Offshore Barge Fluid Recovery System

Abstract

A fluid recapture system includes a translation sub-system, a recirculation sub-system, and an energy conversion sub-system. The translation sub-system a moveable platform on which the recirculation sub-system and energy conversion sub-system are mounted. The recirculation sub-system includes a fluid line having a first end, a second end, and a fluid channel extending from the first end to the second end. The translation sub-system also includes a basin attached to the second end of the fluid line and a fluid pump disposed on the fluid line. The basin is fluidly connected to the fluid channel of the fluid line. The fluid pump is operable to convey fluid from the basin to the first end of the fluid line. The energy conversion sub-system includes a turbine aligned with the basin and a transmission connected to the fluid pump and connected to the turbine. The transmission is operable to power the pump.

Description

TECHNICAL FIELD

[0001] This disclosure relates to fluid systems in offshore barges, and more particularly to fluid recapture systems in offshore barges.BACKGROUND

[0002] Hydrocarbon production operations at an offshore drilling site requires the use of barges for both drilling operations and maintenance operations. Mobile offshore drilling units (MODUs) are self-contained floatable or floating drilling machines. MODUs can include jackups, semisubmersibles, and submersibles. Jackups are combination drilling rig and floating barge, fitted with long support legs that can be raised or lowered independently of each other. The jackup is towed onto location with its legs up and the barge section floating on the water. Upon arrival at the drilling location, the legs are jacked down onto the seafloor, preloaded to securely drive them into the seabottom, and then all legs are jacked further down. Since the legs have been preloaded and will not penetrate the seafloor further, this jacking down of the legs has the effect of raising the jacking mechanism and attached to the barge and drilling package. The entire barge and drilling structure are slowly raised above the water to a predetermined height above the water, so that wave, tidal and current loading acts only on the relatively small legs and not the bulky barge and drilling package.SUMMARY

[0003] The disclosure relates to a fluid recapture system arranged in a drilling or maintenance barge used in offshore drilling operations. The fluid recapture system includes a translation sub-system, a recirculation sub-system, and an energy conversion sub-system. The translation sub-system moves the recirculation and energy conversion sub-system into alignment with a discharged water stream exiting the barge from an elevated position. The energy conversion sub-system interacts with the discharged fluid to rotate a turbine and transfer the rotational energy generated by the turbine, a fluid pump of the recirculation sub-system. The recirculation sub-system captures at least a portion of the discharged fluid after the fluid interacts with the turbine and redirects the recaptured fluid into the barge for reuse. The fluid pump of the recirculation sub-system conveys the recaptured fluid from the exterior of the barge to the interior of the barge.

[0004] The fluid recapture system can decrease the overall load of a barge by reducing the amount of fresh sea water taken from a surrounding body of water. Fresh seawater is be used as a coolant during various operations performed by the barge or equipment carried by the barge. The fluid recapture system is self contained and at least partially self powered. As such, the fluid recapture system can reduce the overall fluid pump load of the barge during operations by providing a portion of the seawater coolant volume at little to no power costs

[0005] In certain aspects, a fluid recapture system includes a translation sub-system, a recirculation sub-system, and an energy conversion sub-system. The translation sub-system has a moveable platform on which the recirculation sub-system and energy conversion sub-system are mounted. The recirculation sub-system has a fluid line with a first end, a second end, and a fluid channel extending from the first end to the second end. A basin of the recirculation sub-system is attached to the second end of the fluid line and fluidly connects to the fluid channel of the fluid line. The recirculation sub-system also includes a fluid pump disposed on the fluid line. The fluid pump is operable to convey fluid from the basin to the first end of the fluid line. The energy conversion sub-system includes a turbine and a transmission. The turbine is aligned with the basin. The transmission is connected to the fluid pump and is connected to the turbine. The transmission is operable to power the pump.

[0006] Some fluid recapture systems also include a nozzle having an inlet configured to receive a discharged fluid and an outlet configured to expel the discharged fluid. A fluid channel can extend between the inlet and outlet. Some outlets of the nozzle define a nozzle axis. In some systems, the basin and the turbine are arranged on the nozzle axis. In some systems, the turbine is arranged between the nozzle and the basin.

[0007] Some fluid recapture systems also include a shield mounted on the turbine. The shield can have a diameter greater than a diameter of the turbine.

[0008] Some fluid recapture systems also include a flexible connector. The flexible connector can be mounted to the first end of the fluid line. In some systems, the flexible connector fluidly connects the fluid channel of the fluid line to a primary fluid circuit of a barge.

[0009] In certain aspects, a fluid recapture system includes a translation sub-system, a recirculation sub-system, an energy conversion sub-system, and a computer sub-system. The translation sub-system includes a moveable platform and a motor operable to move the moveable platform in a first direction and a second direction, opposite the first direction The recirculation sub-system is mounted to the moveable platform and includes a fluid line having a first end, a second end, and a fluid channel extending from the first end to the second end. The recirculation sub-system also includes a basin attached to the second end of the fluid line and fluidly connect to the fluid channel of the fluid line. The energy conversion sub-system is also mounted to the moveable platform and includes a turbine aligned with the basin. The computer sub-system is operable to control the translation sub-system, the recirculation sub-system, and the energy conversion sub-system. The computer sub-system includes a controller, one or more processors, and a non-transitory computer-readable medium storing instructions executable by the one or more processors to perform operations. The operations include determining an elevation of the fluid recapture system relative to a surface of a body of water and prompting the translation sub-system to move in the first or second direction.

[0010] Some fluid recapture systems also include a fluid pump disposed on the fluid line. The fluid pump can be operable to convey fluid from the basin to the first end of the fluid line. Some fluid recapture systems also include a transmission connected to the fluid pump and connected to the turbine. The transmission can be operable to power the pump. Fluid recapture systems can also include a nozzle defining a fluid channel and an outlet. The outlet can define a nozzle axis. The basin and the turbine can be arranged on the nozzle axis. The operations determining a position of the translation sub-system and prompting the moveable platform to move a predetermined distance in the first or second direction based on at least the position of the translation sub-system.

[0011] Some fluid recapture systems also include rails. The moveable platform can be mounted on the rails and / or can be moveable relative to the rails.

[0012] In certain aspects, a barge includes a barge housing with walls having a discharge wall defining an exit port, a cover, and a base. The walls extend between the cover and the base to define an interior volume of the barge housing. The barge also includes a primary fluid circuit arranged in the interior volume of the housing. The primary fluid circuit is fluidly connected to the exit port. The barge also includes a fluid recapture system with an exposed portion arranged outside the interior volume of the housing and a housed portion arranged in the interior volume of the housing. The exposed portion includes an impeller, a shield mounted on the impeller, and a basin aligned with the impeller. The housed portion includes a translation sub-system having a moveable platform, a transmission mechanically connected to the impeller by a shaft, and a flexible connection fluidly connecting the basin to the primary fluid circuit.

[0013] In some barges, the flexible connection and the basin are connected by a fluid line, A fluid pump can be disposed on the fluid line. In some barges, the impeller is operable to power the fluid pump. In some barges, the transmission is operable to power the fluid pump. The impeller can be operable to power the transmission. The impeller can have multiple blades that extend from an impeller hub and are arranged equidistant around the hub.

[0014] Some barges also include a nozzle mounted to an exterior face of the discharge wall. The nozzle can be aligned with the exit port.

[0015] In some barges, the discharge wall comprises an impeller recess sized to receive the impeller. The discharge wall can define a shaft opening in the impeller recess sized to receive the shaft.

[0016] In some barges, the discharge wall comprises a collector recess sized to receive the basin. In some barges, the collector recess comprises a recess wall and a ledge. The recess wall can define a fluid line opening sized to receive a fluid line connecting the flexible connection with the basin. In some barges, the fluid line rests on the ledge.

[0017] In certain aspects, a barge includes barge housing and a fluid recapture system. The fluid recapture system includes a turbine with an impeller. The impeller a hub, multiple blades extending from the hub, a shaft having a first end and a second end, and a shield mounted to the impeller. The impeller is mounted to second end of the shaft. The shaft and the impeller are rotationally coupled. The impeller is arranged between the shield and the shaft. The fluid recapture system also includes a generator and a fluid pump. The generator is connected to the first end of the shaft. The shaft is rotatable relative to the generator. The turbine powers the fluid pump through the generator The fluid recapture system is moveable relative to the barge housing.

[0018] The details of one or more embodiments are set forth in the accompanying drawings and the description below. Other features, objects, and advantages will be apparent from the description and drawings, and from the claims.BRIEF DESCRIPTION OF DRAWINGS

[0019] FIGS. 1A and 1B are a perspective views of a barge having a fluid recapture system in the floating position and the lifted position, respectively.

[0020] FIGS. 2A and 2B are perspective side views of the fluid recapture system in the retracted and extended position, respectively.

[0021] FIG. 3 is a cross sectional view of the barge with a primary fluid circuit connected to the fluid recapture system in the extended position.

[0022] FIG. 4 is a view of an operational logic procedure for operating a fluid recapture system.

[0023] FIG. 5A is a cross sectional side view of the barge in the floating position and the fluid recapture system in the restricted position.

[0024] FIG. 5B is a cross sectional side view of the barge in the lifted position and the fluid recapture system in the retracted position.

[0025] FIG. 5C is a cross sectional view of the barge in the lifted position and the fluid recapture system in the extended position.

[0026] Like reference symbols in the various drawings indicate like elements.DETAILED DESCRIPTION OF THE DRAWINGS

[0027] Offshore barges transport drilling equipment and facilitate offshore hydrocarbon drilling operations in large bodies of water. The disclosed barge includes a primary fluid circuit contained within and mounted to a barge housing. The primary fluid circuit intakes, stores, and discharges fluid used in offshore drill operations. The primary fluid circuit can be a horizontal water (fluid) discharge system which discharges fluid from the housing of the barge, into the body of water. The barge also includes a fluid recapture system (fluid recapture arrangement) that redirects and recaptures at least a portion of the fluid discharged from the barge housing by the primary fluid circuit. The fluid recapture system can decrease the total energy consumption of the barge by rerouting discharged fluid into the primary fluid circuit and by converting hydrostatic energy of discharged fluid into mechanical (rotational) power sufficient to power a fluid pump. In this configuration, the fluid recapture system can be fully or partially self-powered by harnessing the energy of the existing high-pressure discharge fluid exiting from the barge to the sea, and simultaneously using that energy to convey a portion of the discharged water back to the main circulation tank of the barge.

[0028] FIG. 1A is a perspective view of a barge 100 in a floating (first) position. In the floating position, the barge 100 can be powered by a barge motor (not shown) to move within a body of water to an offshore well or drilling site. The barge 100 includes a housing 102 having multiple (side) walls 104. The side walls 104 include a discharge wall 104a. The housing 102 also includes a ceiling (cover) 104b and a base (barge floor) 104c. The side walls 104, ceiling 104b, and base 104c at least partially define an interior volume 106. The walls 104 extend between the ceiling 104b and the base 104c. The base 104c is arranged between the ceiling 104b and the body of water (e.g., closer to the body of water, or contacting the body of water). Drilling equipment (not shown) can be mounted to an exterior surface 108 of the housing or arranged within the interior space of the housing.

[0029] Translatable legs 110 are mounted to the exterior of the housing 102. In the floating position of the barge 100, the legs 110 are raised relative to the base 104c and / or relative to the housing 102. The legs 110 may be mounted to rails on the exterior of the housing. In the floating a majority portion of the legs extend away from the base of the housing. In some floating position, the legs are at least partially submerged in a body of water. In some floating positions, the legs are arranged at a non-zero distance from the surface of the water). The legs 110 slide in a first (vertical) direction to extend into or out of a body of water and to move relative to the barge housing 102.

[0030] The housing 102 defines a well or casing opening (inlet) 112 in base 104c the housing 102. The opening 112 is (fluidly) connectable to a wellbore drilled in the floor of the body of water (not shown). In some cases, the opening is defined in the walls or ceiling of the housing. Some barges have multiple openings or inlets fluidly connecting the interior space with a connected pipe of casing. The opening can be releasably sealed to isolate the interior space of the housing from the environment (e.g., from a body of water). The housing 102 also includes an exit port 114 defined in the discharge wall 104a. The exit port 114 guides, conveys, and / or expels discharge fluid from a primary fluid circuit 116 (FIG. 3).

[0031] A nozzle 118 of the barge 100 is mounted to the exterior surface 108 of the discharge wall 104a. The nozzle 118 is aligned with or arranged on the exit port 114 such that the fluid exiting the exit port 114 enters the nozzle 118. The nozzle 118 is an L-shaped or curved nozzle. High pressure fluid exiting the exit port 114 is guided by the nozzle 118 from a horizontal direction (e.g., parallel to the body of water, perpendicular to the discharge wall) to a vertical direction (e.g., perpendicular to the body of water, parallel to the discharge wall). The nozzle 118 is mounted to the housing 102. The nozzle 118 is welded to the exterior surface 108 of the discharge wall 104a, however, some nozzles are integral with and / or part of the housing. Some nozzles extend through the housing exit port and a nozzle inlet is at least partially arranged in the interior volume of the housing. In some cases, the outlet discharges or expels fluid in a first direction and the nozzle redirects the discharged or expelled fluid into a second direction. The first direction can be different from the second direction.

[0032] The barge 100 includes a computer sub-system 150 and fluid recapture system 200 for recapturing at least a portion of fluid discharged from the nozzle 118. The fluid recapture system 200 is moveable relative to the housing 102, discharge wall 104a, and / or the primary fluid circuit 116 (FIG. 3). The fluid recapture system can include the nozzle. The fluid recapture system 200 includes a housed (first) portion 202 (e.g., a housed arrangement) and an exposed (second) portion 204 (e.g., exposed arrangement). The housed portion 202 is arranged and / or fixed in the interior volume 106 of the barge housing 102 of the barge 100. The exposed portion 204 is arranged or fixed outside the interior volume 106 of the barge housing 102.

[0033] In some cases, the fluid recapture system includes a transitional (third) portion (e.g., a transitional arrangement). The transitional portion is arranged in the interior volume of the barge housing in some positions of the moveable fluid recapture system and arranged exterior to the housing (e.g., outside the interior volume of the housing) in other position of the moveable fluid recapture system. For example, in a first (retracted) position of the fluid recapture system, the housed and transitional portions may be arranged in interior volume of the barge housing and the exposed position may be arranged outside the barge housing. In a second (extended) position of the fluid recapture system, the housed portion may be arranged in the interior volume and the transitional portion and exposed portion may be arranged outside the barge housing.

[0034] The computer sub-system 150 includes a controller 152, one or more processors 154, and a non-transitory computer-readable medium storing instructions executable by the one or more processors to perform operations. The operations can include determining an elevation of the fluid recapture system relative to a surface of a body of water; and prompting the translation sub-system to move in the first or second direction. The computer sub-system can also determine the position of the translation sub-system and prompt the translation sub-system to move in a first or second direction by a predetermined distance. The fluid recapture system 200 is operably connected and controllable by the computer sub-system 150. The legs 110 are also operably connected and controllable by the computer sub-system 150. The computer sub-system can also connect and / or control mounted drilling, transport, and / or other operational equipment on or in the barge.

[0035] FIG. 1B is a perspective view of the barge 100 in the lifted (second) position. In the second position, the legs 110 slide along the walls 104 of the housing 102 towards and past the base 104c of the housing 102. In the lifted position, the legs 110 of the barge extend into the body of water and contact the floor of the body of water. The legs 110, after contacting the floor, press the barge housing away from a surface of the body of water such that the base 104c of the housing 102 is a non-zero and / or predefined distance dlifted (FIGS. 5B and 5C) from the surface of the body of water.

[0036] FIGS. 2A and 2B are a perspective views of the fluid recapture system 200 in a (first) retracted position and a (second) extended position, respectively. In the retracted position, the exposed portion 204 of the fluid recapture system 200 mates with the exterior face 208 of the discharge wall 104a. The releasable engagement or mating of the discharge wall 104a with the exposed portion 204 of the fluid recapture system 200 protects the fluid recapture system from the environment during transportation and other operations. In the extended position, the exposed portion 204 of the fluid recapture system 200 is at least partially aligned with the nozzle 118 (FIGS. 3 and 55910C). In the extended position, the exposed portion 204 of the fluid recapture system 200 at least partially aligns with the nozzle 118 (FIGS. 1A, 1B, and 3) so that fluid discharged from the nozzle 118 contacts at least a part of the exposed portion 204 of the fluid recapture system 200. The discharged fluid is pressurized and exits the nozzle 118 at an elevated location relative to the fluid recapture system 200. The fluid recapture system 200 is operable to capture at least a portion of the energy of the discharge fluid and convert the hydrostatic energy into mechanical power. The fluid recapture system 200 also recirculates the captured fluid into the primary fluid circuit 116 of the barge 100 using the converted mechanical power. The recapture and recirculation of the discharged fluid can reduce the energy load operating the primary fluid circuit, for example, by reducing the energy load of fluid pumps in the primary fluid circuit when drawing and conveying fresh fluid from the surrounding body of water.

[0037] Some recapture systems interact with about 5% to about 100% of the discharged fluid for generating power. In some cases, for example, about 25% to about 50%, about 10% to about 90%, about 20% to about 75%, about 20% to about 90%, about 40% to about 80%, about 30% to about 75%, about 40% to about 90%, about 50% to about 90%, about 50% to about 75%, about 50% to about 80%, or about 25% to about 90% of the discharge fluid interacts with the fluid recapture system generate (recapture) energy of the discharged fluid. In some cases, the fluid recapture system is operable interact with at least about 5%, at least about 10%, at least about 20%, at least about 25% at least, about 30%, at least about 40%, at least about 50%, at least about 60%, at least about 70% at least about 75%, at least about 80%, or at least about 90% of the discharged fluid from the nozzle.

[0038] Some recapture systems recollect (recapture) about 1% to about 100% of the discharge fluid expelled from the nozzle (e.g., about 25% to about 50% of the discharge fluid). For example, the fluid recapture system can collect about 10% to about 80%, about 15% to about 75%, about 20% to about 10% to about 90%, about 20% to about 75%, about 20% to about 90%, about 40% to about 80%, about 30% to about 75%, about 40% to about 90%, about 50% to about 90%, about 50% to about 75%, about 50% to about 80%, or about 25% to about 90% of the discharge fluid for recirculation and reuse in barge operations. In some cases, the fluid recapture system is operable to recapture at least about 5%, at least about 10%, at least about 20%, at least about 25% at least, about 30%, at least about 40%, at least about 50%, at least about 60%, at least about 70% at least about 75%, at least about 80%, or at least about 90% of the fluid discharged from the nozzle.

[0039] Some recapture systems recollect (recapture) an amount of discharge fluid proportional to the total amount of fluid used in the barge. For example, the recapture system may provide about 25% to about 50% of the total fluid used in the primary fluid circuit of the barge. In some cases, the fluid recapture system is operable to recapture about 1% to about 100% of the total volume of fluid used in barge operations. The fluid recapture system can collect and / or provide about 10% to about 80%, about 15% to about 75%, about 20% to about 10% to about 90%, about 20% to about 75%, about 20% to about 90%, about 40% to about 80%, about 30% to about 75%, about 40% to about 90%, about 50% to about 90%, about 50% to about 75%, about 50% to about 80%, or about 25% to about 90% of the total fluid volume used in barge operations or used by be primary fluid circuit in barge operations.

[0040] The fluid recapture system 200 includes a translation sub-system 210, an energy conversion sub-system 212, and a recirculation sub-system 214. The energy conversion sub-system 212 and the recirculation sub-system 214 are mounted to or arranged on the translation sub-system 210. The translation sub-system 210 is operably connected and controlled by the computer sub-system 150. The translation sub-system 210 is moveable relative to the discharge wall 104a to move the fluid recapture system 200 between the extended and retracted positions.

[0041] The translation sub-system 210 includes a moveable platform 220 mounted on a guiding structure. The guiding structures can be part of the translation sub-system, part of the barge housing, or separate from both translation sub-system and barge housing. The guiding structure in the barge 100 are rails 222 mounted to the base 104c of the barge housing 102. The moveable platform 220 includes a first wheel 224 and a second wheel 226. The rails 222 include a first rail 228 and second rail 230 each rail 228, 230 defining a groove 232. The groove 232 on the first rail 228 is sized to receive the first wheel 224. The groove 232 on the second rail 230 is sized to receive the second wheel 226. The rails 222 are fixed to (e.g., attached to or integral with (the base 104c of the barge housing (FIG. 1A). The rails can be bolted to the barge housing or welded to the barge housing. The wheels 224, 226 move within the grooves 232 of the rails 222 to move the platform 220 in a forward (first) direction and backwards (second) direction. The second direction is opposite the first direction. In this configuration, the moveable platform 220 translates in the forward direction towards the discharge wall 104a (FIG. 1A) of the barge housing 102 (FIG. 1A). The moveable platform 220 translates in the backwards direction, away from the discharge wall 104a (FIG. 1A).

[0042] The translation sub-system 210 includes a driver for moving recapture sub-system 200 between positions (e.g., between the first, retracted position and the second, extended position). In the translation sub-system 210, the driver is a motor 234 connected to the first and second wheels 224, 226. The motor 234 is operably connected to and controlled by the computer sub-system 150. In use, the computer sub-system 150 prompts the motor 234 to move or terminate movement of the wheels 224, 226.

[0043] The energy conversion sub-system 212 and recirculation sub-system 214 are translationally fixed to the moveable platform 220. In this configuration, movement of the platform 220 along the rails 222 also translates the energy conversion sub-system 212 and the recirculation sub-system 214 in the same direction relative to the barge housing 102 and / or the discharge wall 104a. The rails can include wheel stops and / or speed bumps arranged at a location on the rails that correspond with the extended and retracted positions.

[0044] In some systems, the energy conversion sub-system and the fluid recirculation sub-system are moveable relative to each other. For example, the translation sub-system can include a first moveable platform and a second moveable platform translatable relative to each other and relative to the discharge wall 104a. The energy conversion sub-system can be arranged on or mounted to the first moveable platform. The fluid recirculation sub-system can be arranged on or mounted to the second moveable platform. In some cases, the translation sub-system is an expandable or slidable connection (e.g., hydraulically powered movement or pistons) rather than a moveable platform. In some cases, the moveable platform includes continuous track (caterpillar tread, tank treads) rather than wheels to move the moveable platform. While the translation sub-system has been described as guided by rails, some translation sub-systems can be steerable or fixed to a different guiding structure.

[0045] The rails can include triggers and / or sensors indicating the platform location relative to the rails. The triggers and / or sensors are operable to connect to the computer sub-system and to transmit platform position data generated by the triggers and / or sensors. Position sensors of the translation sub-system can transmit (platform) translation data to the computer sub-system. The computer sub-system can determine and / or identify the position of the fluid recapture system at least partially based on the translation data. The translation sensors can include contact sensors, pressure sensors, acoustic sensors, magnetic sensors, and / or conductive sensors that measure or sense the position of the wheels relative to the rails. In some cases, the wheels include rotational sensors for measuring a rotation rate or revolution count. The rotation sensors can transmit rotational data generated by the rotation sensors to the computer sub-system and the computer sub-system can determine a velocity, distance, and / or acceleration of the translation sub-system based at least in part, on the received rotational data. In some cases, the guiding structure (rails) of the translation sub-system include wheel stops at a first location on the guiding 11 tructuree and a second location of the guiding structure. The first location can correspond to one of the retracted or extended position of the fluid recapture system and the second location can correspond to the other one of the retracted or extended position of the fluid recapture system.

[0046] The energy conversion sub-system 212 is mounted on the moveable platform 220. The energy conversion sub-system is translationally fixed to the moveable platform 220 such that movement of the moveable platform 220 also moves the energy sub-system 212.

[0047] The energy conversion sub-system 212 includes an energy capture unit and an energy converter unit. The energy capture unit in the energy conversion sub-system is a turbine 236. The energy converter unit is a transmission 237. Some energy capture units are water wheels, impellers, propellers, fans, heat plates, or thermal batteries. Some energy converter units are mechanical energy converter units for receiving mechanical energy and outputting mechanical energy (e.g., translational or rotational energy).

[0048] The turbine 236 includes a shaft 238 and an impeller The impeller 240 is mounted, fixed to, or integral with the shaft 238 by a keyway (e.g., a keyway connection). The impeller 240 and shaft 238 are rotationally coupled by the keyway. In this configuration, rotation of the impeller 240 also rotates the shaft 238 via the keyway connection. Keyway connections can include a key seat (e.g., a groove embedded in the shaft or impeller), a key, and a keyway (e.g., a groove embedded in the impeller or shaft). Some shafts and impellers are rotationally connected by another connector or connection (e.g., a clutch connection, weld connection, or other mechanical connection). In some sub-systems, the shaft and impeller are connected by linkages that transfer the rotational force of the impeller to the shaft. In this configuration, the rotational speed of the impeller can be different from the rotational speed of the shaft (e.g., faster, or slower).

[0049] The shaft 238 extends from a first (exposed) end 242 to a second (housed) end 244. The impeller 240 is mounted to the first end 242 of the shaft 238. The first end 242 of the shaft 238 and the impeller 240 are arranged outside or external to the interior volume 106 of the barge housing 102. In this configuration, the impeller 240 and first end 242 are arranged adjacent to the external face 208 of the discharge wall 104a. The second end 244 is arranged in the interior volume 106 of the barge housing 102. The shaft 238 is slidable relative to the barge housing 102 (FIGS. 3 and 5A-C) through a shaft aperture (FIG. 3) defined in the housing 102 (FIG. 3).

[0050] The impeller 240 includes a hub 246 attached to the second end 244 of the shaft 238. In some cases, the impeller is a water wheel or a propeller. Multiple blades 248 extend radially from the hub 246 and terminate in tips 250. Some blades are angled. The blades 248 are arranged equidistant around the hub 246. A first rim 252 and a second rim 254 each slidably connect to the tips 250 of the blades 248 such that the blades 248 are rotationally constrained to the rims 252. The blades can be connected to the rims by a cam and track (e.g., protrusion and groove) connection. The first and second rim can be arranged on or adjacent to the tips. The first end 242 and the second end 244 of the shaft 238 define a shafted axis 256. The hub 246 first rim 252, and second rim 254 are centered on the shaft axis 256. The hub 246 is arranged concentrically relative to the first and second rims 252, 254. The first rim 252 is arranged between the exterior face 208 of the discharge wall 104a and the second rim 254. The first rim 252 is fixed a distance drims from the second rim 254. The distance drims can be about equal to a width of the blades. The first rim and second rims 252, 254 define a slot 258 through which discharged fluid can pass. The slot 258 can be about equal to a width of the blades or less than the width of the blades.

[0051] The turbine 136 also includes a shield 260 mounted to the impeller 240 at the second rim 254. The shield is domed and connects to the second rim 254 of the impeller 140. An edge 262 of the shield 260 includes a mating surface for releasably engaging the shield with the exterior face 208 of the discharge wall 104a. In the shield 260 the mating surface is a seal ring (not shown). The seal engages with the exterior face 208 of the discharge wall 104a and isolates the impeller and shaft from the environment when the fluid recapture system is in the retracted position. The shield 260 also includes a surface 266 oriented away from the impeller 240 and barge housing 102. The surface 266 is a rubber surface that protects the impeller 240 from the environment, for example, during transportation. In some cases, the shield is made of or includes rubber. In some recapture systems, the shield is separate from the turbine. In some cases, the shield is mounted to the hub.

[0052] The transmission 237 (gearbox) includes a set of gears (gear set) for adjusting the speed and / or direction of the rotational energy of the turbine 236. The transmission 237 connects to the pump 146 and transfers mechanical energy from the transmission 237 to the pump 146. For example, the transmission 237 rotates the pump 146.

[0053] Some energy converters, for example, electric generators, can convert rotational motion of the turbine into electrical energy. Electric generators receive rotational motion from the turbine and produce electric power which can be used to charge batteries or power other electrical equipment. Some energy converters are operable to convert the rotational motion of the turbine into other mechanical motion and / or electrical power (e.g., to power a motor, battery, or other electrical power source).

[0054] The turbine size and operational parameters (e.g., rotational speed capacity), can be proportional to the barge size and desired fluid volumes in the primary fluid circuit. Water pressure and velocity can also determine the nozzle size, impeller size, and shaft size.

[0055] Energy converters of the energy conversion sub-system can be connected (directly or indirectly) to at least one pump of the recirculation sub-system for conveying recollected discharge fluid into the interior volume of the barge housing. In direct connection, the power output by the energy converter transfers directly to the fluid pump. In indirect connection, the power output by the energy converter charges a battery and the battery is operable to power a motor of the fluid pump. In direction connection, the power output by the energy converter is equal to the power received by the pump. In indirect connection, the power output by the energy converter may or may not be equal to the power received by the fluid pump.

[0056] In the energy conversion sub-system 212, the energy converter is the transmission 137 which is directly connected to a recirculation pump 146 of the recirculation sub-system 214. In direct connection, the output power of the transmission 237 is equal to the input power received by the pump 146.

[0057] In a direct connection configuration of the fluid recapture system, increases and decreases in output power generation by the transmission generate proportional changes in input power received by the recirculation pump. As such, increased flow rates or increased fluid volumes of the expelled fluid can increase the rotational energy captured by the turbine and increase the volume of fluid captured by the basin. The turbine transfers the increased (rotational) energy to the transmission. The transmission, due to the direct connection configuration, proportionally transfers the increased energy to the pump. The pump, due to the increased fluid rate or fluid volume of the expelled fluid also has a higher load requirement to transfer an increased volume of recovered fluid form the basin to the main tank of the primary fluid circuit. The increased load requirement is offset by the proportional increase in power the pump receives from the transmission. In this configuration, the recapture sub-system increases or decreases power generation proportionally as the load required to move the recovered fluid increases or decreases, respectively. The fluid recapture system can convey variable amounts of discharge fluid without increasing the overall energy load of the barge.

[0058] The recirculation sub-system 214 includes the fluid pump 146 (e.g., at least one fluid pump) arranged on a fluid line 270. The fluid line 270 extends from a first (housed) end 272 to a second (exposed) end 274. The first end 272 is arranged in the interior volume of the housing 102. The second end 274 is arranged outside the interior volume of the housing (e.g., outside the housing 102. The fluid line 270 defines a fluid channel 276 extending from the first end 272 to the second end 274 of the fluid line 270. The fluid channel is operable to guide fluid from the second end of the fluid line to the first end of the fluid line (e.g., from the basin to the primary fluid circuit).

[0059] Recirculation sub-systems also include a collector or collector body that is vertically aligned with the impeller. In the recirculation sub-system 214, collector is a basin 280. The basin 280 includes a body 282 having a first open end 284 and a second open end 286. The first open end 284 defines a mouth (first opening) 288 having a mouth cross section. The basin 280 has a rectangular cross sectional, however, other basins or collectors can have a cross sections of a different shape. The second end 286 of the basin 280 defines a drain 290 (second opening, drainage hole) having a drain cross section. The drain cross section is circular, however, other drain cross sections can be a different shape. The area of the mouth cross section is greater than the area of the drain cross section.

[0060] The basin 280 connects to the second end 286 of the fluid line 270 at the drain of 290 of the basin 280. The second end of the fluid line and / or the second end of the basin can also include at least one connector for engaging and fluidly connecting the basin to the fluid line. The basin 280 vertically aligns with the nozzle 118 in the extended position so that at least part of the fluid discharged by the nozzle is collected or recovered by the basin 280. In some basins, the second end also includes a valve at the drain of the basin for controlling a flow of collected fluid. The basin may include a grate or filter arranged over the mouth to prevent the basin from retaining solid debris.

[0061] The recirculation sub-system also includes the fluid pump 146. The fluid pump 146 is operably connected to and controlled by the computer sub-system 150. The fluid pump is powered by the power converter (e.g., the output power of the power converter). The energy converter is mounted on or attached to the fluid pump 146. The fluid pump is operable to convey fluid from the basin at the second end of the fluid line to the first end of the fluid line.

[0062] The recirculation (recovery) sub-system 210 includes a flexible connector 294 (e.g., expandable connector, compressible connector, stretchable connector) arranged in the interior volume 106 at the first end 272 of the fluid line 270. The flexible connector 294 can be integral with the fluid line or attached to the fluid line. In some cases, the flexible connector 294 is separate from the recirculation sub-system. The flexible connector 294 has a compressed state (FIG. 2A) and an expanded state (FIG. 2B). The flexible connector 294 is in the compressed state when the fluid recapture system 200 is in the retracted position. The flexible connector 294 is in the expanded state when the fluid recapture system 200 is in the extended state. The flexible connector 294 moves between the compressed and expanded state as the translation sub-system 210 moves the fluid recapture system 200 between the retracted and expanded position, respectively. The flexible connector 294 fluidly connects the first end 272 of the fluid line 270 with the primary fluid circuit 116 (FIG. 3) of the barge 100. In some barges, the flexible connector fluidly connects the recirculation sub-system to the primary fluid circuit of the barge.

[0063] The flexible connector 294 includes an expandable body that stretches (expands) or contracts (compresses). The flexible connector can include or be made of an elastic material and / or can include a bellows section (e.g., accordion section). The flexible connector defines a channel extending through the body of the flexible connector to fluidly connect the first end 272 of the fluid line 270 with the primary fluid circuit. Some flexible connectors are attached to a valve configured to control the fluid connection between the fluid recapture system and the primary fluid circuit of the barge. The valve may be located on a rigid pipe connected to the flexible connector.

[0064] FIG. 3 is a cross sectional side view of the barge 100 with the primary fluid circuit 116, the fluid recapture system 200, and the nozzle 118. The fluid recapture system 200 is in the extended position so that the impeller 240 and the basin 280 are vertically aligned with the nozzle 118. The flexible connector 294 is in the expanded state. The flexible connector 194 fluidly connects the basin to the primary fluid circuit 116 via the fluid line 270.

[0065] The discharge wall 104a of the housing 102 defines an impeller (first) recess 296 and a collector (second) recess 297. The impeller recess 296 is sized to receive the impeller 140. In some barges, the impeller recess is sized to receive the impeller and a portion of the shaft (e.g., the exposed portion of the fluid recapture system). The housing 102 also defines a shaft opening 298 defined in the impeller recess 296 of the housing 102. The shaft opening 298 is sized to receive the shaft 138. The shaft 138 is slidable through the shaft opening 298. The housing also defines a fluid line opening 299 in the collector recess 297 sized to receive the fluid line 270 of the recirculation sub-system. The collector recess 297 includes a ledge 297a and an inner wall 297b. The fluid line opening 299 is arranged in the inner wall 197b adjacent the ledge 197a. The fluid line 270 sits on the ledge 297a and is slidable relative to the ledge 197b. The ledge can provide structural support to the fluid line.

[0066] The primary fluid circuit 116 includes a primary fluid pipe 300 extending from the opening 112 in the base 104c of the barge housing 102 to the exit port 114 defined in the discharge wall 104a of the barge housing 102. The primary fluid pipe 300 is arranged in the interior volume 106 of the barge and is operable to guide pressurized fluid 304 from the opening 112 to the exit port 114. Fluid flowing the in the primary fluid circuit can be water, sea water, or a waste fluid. The fluid 304 flowing in the circuit 116 is seawater 304a.

[0067] The primary fluid circuit also includes a (seawater) pump 306 (fluid pump) disposed on the fluid pipe 300. The seawater pump 306 is operable to draw in and convey seawater from a casing 308 connected to the opening 112 into the interior volume of the fluid circuit. The seater pump can pressurize the fluid flowing in the primary fluid circuit.

[0068] The primary fluid circuit 116 has a main circulation tank 310 arranged downstream of the seater pump 306. The main circulation tank 310 is sized to retain of seawater 304 prior to use in barge operations. The seawater 304 then flows from the main circulation tank 310 to downstream operations where the seawater is used (e.g., consumed) for cooling purposes The seawater can also be used for other maintenance or operations other than cooling. After using the seawater in operations, the seawater continues to flow through to primary fluid circuit towards the exit port 114. At the exit port 114, the consumed seawater 304 is discharged into the nozzle 118 mounted to the exterior face 208 of the discharge wall 104a. The nozzle receives discharged fluid (discharged seawater) 304b and redirects the discharged fluid 304b to the fluid recapture system 200.

[0069] The nozzle 118 defines a fluid channel 320 extending from a nozzle inlet 322 (first aperture, inlet body) to a nozzle outlet 324 (second aperture, outlet body). The nozzle outlet 324 is arranged at a predetermined distance dnoz from the discharge wall 104a (e.g., a fixed distance from an exterior face 208 of the discharge wall of the housing). The fluid channel 320 receives, directs, and expels the discharged fluid 304b (e.g., fluid discharged from the exit port of the barge housing).

[0070] The nozzle outlet 324 defines a nozzle axis 328. In the extended position, the basin 280 and the impeller 240 are aligned with the nozzle axis 328. In some systems, the nozzle axis intersects at least a part of the basin and / or impeller intersect the axis. In some barges, the basin and / or impeller are centered on the nozzle axis.

[0071] The nozzle inlet 322 defines an intake axis 330. The intake axis 330 is perpendicular to the nozzle axis 328 and the nozzle 118 forms an L-shape. In some systems, the outlet axis is angled relative to the intake axis. In some cases, the nozzle axis is parallel with or arranged on the intake axis. In some cases, the exit port of the housing defines the intake axis. In some barges, the exit port and the nozzle inlet define the intake axis.

[0072] The nozzle outlet 324 directs and expels discharge fluid 304b to the impeller 240 of the turbine 236. Expelled discharge fluid 304c expelled from the nozzle outlet 324 (expelled fluid 304c) forms a flow path 340 outside the barge 100. At least a portion of the impeller 240 intersects the first flow path 340 of the expelled fluid 304c (free falling discharge fluid). The interaction between the expelled fluid 304c and the impeller 240 rotates the impeller 240 and the shaft 238. The rotation of the turbine 236 powers the pump 146 via the energy converter. The expelled fluid 304c falling from the impeller 240 forms a second flow path 342. In some cases, some expelled fluid may avoid interaction with the impeller and joins or partially forms the second flow path. At least a portion of the basin 280 intersects the second flow path 342. In the barge 100, at least a portion of the mouth 288 (e.g., the mouth cross section) intersects the second flow path 342 and recovers at least a portion of the expelled fluid 304c. The recovered fluid 304d (e.g., the expelled fluid recaptured by the fluid recapture system) is conveyed by the fluid pump 146 from the basin 280 to the main tank of the primary fluid circuit via the fluid line 270 and flexible connector 294. The addition of the recovered fluid 304d to the seawater 304a in the main tank of the primary fluid circuit 116 can reduce the amount of fresh seawater 304 required to fill the tank, thereby reducing the energy load of the seawater pump and the total energy load of the barge 100.

[0073] [[Inventors: Based on your comments, I moved this paragraph above to the “alternate versions” section of this detailed description (generally starting at ¶0082). FIG. 4 is a view of a logic diagram 301 showing the electronic operation of the barge 100. The computer sub-system of the barge may prompt other components of the barge or components connected to the barge, in accordance with the logic diagram. The logic diagram 301 shows operation of the fluid recapture system 200 (FIGS. 2A-B) moving between the retracted position and the extended position while the barge 100 is in the lifted position.

[0074] In the logic diagram 301, the computer sub-system 150 controls motor switches to prompt a motor (FIG. 2A) of the fluid recapture system 200. When moving the fluid recapture system 200 from the retracted position to the extended position, the computer sub-system 150 confirms that the barge is in the lifted position then prompts the motor to move the fluid recapture system 200 in the forward (first) direction, towards the discharge wall 104a. The motor stops, or the computer prompts the motor to stop forward movement when a forward limit switch sensor is triggered. The motor stops and the fluid recapture system 200 has fully transitioned from the retracted position to the extended position.

[0075] Some systems terminate movement once the translation system has moved a predetermined distance. In this configuration, the computer sub-system determines that the translation sub-system has moved the predetermined distance from the retracted position, then prompts the translation sub-system to terminate movement. The movement of the translation sub-system by the predetermined distance also moves the exposed portion of the fluid recapture system the predetermined distance away from the exterior face of the discharge wall. The predetermined distance can be about the distance between the exterior surface of the discharge wall and the nozzle outlet (or an axis defined by the nozzle outlet). In some cases, the predetermined distance is about equal to the sum of a distance between the exterior surface of the discharge wall and the nozzle outlet (or an axis defined by the nozzle outlet), and at least half a width of the blade of the turbine (or a distance between the first and second rims, drim).

[0076] FIG. 5A is a view of the barge 100 in a body of water 350 in the floating position and the fluid recapture system 200 in the retracted position. In the floating position, the legs 110 of the barge 100 are raised and extend away from a surface 352 of a body of water. The barge 100 can move freely about the body of water 350 and transport drilling equipment to a site. The fluid recapture system 200 is in the retracted position. The impeller 240 is arranged in the impeller recess 196 of the discharge wall 104a and the basin 280 is arranged in the collector recess 297 of the discharge wall 104a. The shield 260 of the turbine 136 is engaged with the exterior face 208 of the discharge wall 104a and the exposed portion of the energy conversion sub-system 212 of the fluid recapture system 200 is fluidically isolated from the body of water 350. The flexible connection is in the compressed state. Once the barge 100 arrives at the site, the barge may transition from the floating position to the lifted position. The computer sub-system prompts the legs to translate or slide along the housing 102 towards the body of water 350. The legs 110 contact a floor of the body of water and continue to extend towards the body of water. The legs 110 continue to press towards the water 350 and the barge housing 102 lifts away from the surface 352 of the water. An air gap sensor can determine the height or distance between the surface 352 of the body of water 350 and the housing 102. Once a predetermined height or distance is achieved, the computer sub-system 150 prompts the legs 110 to terminate movement.

[0077] FIG. 5B is a cross sectional front view of the barge 100 in the body of water 350 in the lifted position. In the lifted position, the barge can perform operational and drilling procedures. The barge 100 includes a seawater pipeline extending from the floor of the barge housing 102. The seawater pipe 308 extends below the surface 352 of the body of water 350 to the opening 112 in the base 104c of the barge housing 102. Seawater pump of the primary fluid circuit 116 is operable to draw seawater 304 from the body of water 350 into the primary fluid circuit 116. Because the barge is in the lifted position, the recapture sub-system may move between the retracted position and the extended position.

[0078] To move from the retracted position to the extended position, the computer sub-system 150 prompts the translation sub-system 210 to move the moveable platform 220 a predetermined distance. In some cases, the predetermined distance is the distance between the impeller and / or basin and the nozzle axis when the fluid recapture system is in the retracted position. The translation sub-system moves the energy conversion sub-system and the recirculation sub-system the predetermined distance so that the basin and impeller are at least partially aligned with the nozzle axis. The flexible connector 294 remains connected to the static main fluid tank 247 of the primary fluid circuit 116 and remains connected to the translating first end 272 of the fluid line 270. To maintain these connections, the flexible connection 194 stretches or expands at least the predetermined distance.

[0079] FIG. 5C is a view of barge 100 in the body of water 350 in the lifted position and the fluid recapture system 200 in the extended position. In the extended position, the flexible connection is in the expanded state and maintains a fluid connection between the first end 272 of the fluid line 270 and the main tank of the primary fluid circuit. The fluid recapture system is operable and position to capture energy from expelled discharge fluid 304b and recover (capture) discharge fluid for recirculating into the primary fluid circuit.

[0080] While a translation sub-system with a wheels and rails has been described, some translation sub-systems include gears and racks for controlling movement of the translation sub-system relative to the housing.

[0081] While a translation sub-system with two states has been described, some translation sub-system can include additional states and / or positions. For example, some translation sub-systems can have an extended position that includes one or more sub-states that fully align, partially align, and / or fully unaligned the fluid discharge system with the nozzle. In this configuration, the computer sub-system can monitor the fluid recapture system in the extended position and pr the motor to move further in the first direction or an opposite second prompt the translation sub-system to move in the first or second direction relative to the discharge wall, thereby increasing or decreasing the amount of discharged water interacting with the turbine.

[0082] In some systems, the translation sub-system can move the recapture sub-system laterally to align the recaptures sub-system with a first and / or second fluid path.

[0083] In some barges, the size and cross section of the nozzle outlet is proportional or equal to the size and cross section of the mouth of the basin.

[0084] While a recapture system with an energy conversion sub-system has been described, some systems include multiple energy conversion units arranged vertically (e.g., long the nozzle axis) and / or or horizontally (e.g., perpendicular to the nozzle axis) on the exterior face 208 of the discharge wall. For example, an energy conversion sub-system can include at least two waterwheels or turbines arranged on the nozzle axis, offset from the nozzle axis. A first turbine may be arranged between the second turbine and the nozzle outlet. In this configuration, the expelled discharge fluid can interact with both turbines, either turbine, or neither turbine.

[0085] While an energy converter unit (transmission) for receiving rotational energy and transmitting rotational energy has been described by the transmission 237, some energy converter units receive rotational energy and transmit a movement energy (e.g., axial movement, or translation).

[0086] While an energy converter unit (transmission) for receiving mechanical energy and transmitting mechanical energy has been described by the transmission 237, some energy converter units receive mechanical energy and transmit electrical energy, magnetic energy, hydraulic energy, motional energy, thermal energy, elastic (spring energy), chemical energy, or electromagnetic energy.

[0087] In some energy conversion sub-systems, the energy converter unit is an electrical generator (generator) for producing electrical power from rotational motion. The electrical power (energy) produced or generated by the generator can be retained in a battery (not shown) such that the rotation of the turbine charges a battery connected to the generator. A battery in the energy conversion sub-system can reduce volatility in the power provided to the recapture sub-system. For example, variations in discharge fluid volume and discharge fluid flow rate can cause proportional variations in the power levels generated by the generator. A battery can store energy during periods of increased or peak power generation and can provide supplemental power in periods of decreased or low power generation. In this configuration, the power received by the fluid recapture system (e.g., the at least one pump of the reticulation sub-system, is more uniform and / or smooth as compared to a direct connection between the at least one pump and the generator.

[0088] The battery can be operatively connected to and controlled by the computer sub-system. The computer sub-system can determine a desired power output level (range) or receive a known power output level (range) of the battery based on received sensor data. The computer sub-system can receive a known power input range of the at least one pump of the recirculation sub-system or determine a desired power input level (range) of the pump of the recirculation sub-system. In some cases, electrical power produced or generated by the generator directly powers at least one pump in the fluid recirculation sub-system.

[0089] While a recapture system with an energy conversion sub-system has been described, some systems include multiple energy conversion sub-systems arranged vertically (e.g., long the nozzle axis) and / or or horizontally (e.g., perpendicular to the nozzle axis) on the exterior face 208 of the discharge wall.

[0090] While a recapture system with a recirculation sub-system has been described, some systems include multiple recirculation sub-systems arranged vertically (e.g., long the nozzle axis) and / or or horizontally (e.g., perpendicular to the nozzle axis) on the exterior face 208 of the discharge wall.

[0091] While a barge with a single recapture system has been described, some barges include multiple recapture systems arranged on the discharge wall or arranged on other walls.

[0092] While a recapture system having an energy conversion sub-system has been described, some recapture systems do not include an energy conversion sub-system. In such a configuration, the basin recovers at least a portion of the expelled fluid flowing in the first flow path.

[0093] While a recapture system having a recirculation sub-system has been described, some recapture systems do not include a recirculation sub-system. In such a configuration, the turbine can be used to charge a battery and the discharged fluid falls into the body of water. In some cases, the turbine can provide power to other components in the primary fluid circuit (e.g., the seawater pump) and / or the barge 100.

[0094] While a fixed, L-shaped nozzle has been described, some nozzles are hinged and / or differently shaped. For example, in some nozzles, the nozzle outlet is a cone, spiral, serpentine, or other shape for flowing fluid. In some systems, the nozzle outlet is moveable relative to the nozzle inlet and / or discharge wall, for example by a hinged connection. A hinged outlet can include a recapture (first, hinged, aligned) state in which the nozzle outlet aligns with the turbine to direct fluid to the turbine. The hinged outlet can have an avoidant (second, unhinged, unaligned) state in which the nozzle outlet is not aligned with the turbine and directs a discharged fluid to flow directly into the body of water without interacting with the turbine and / or basin. In some cases, the nozzle has an intermediate (third, partly hinged, partly aligned) state between the recapture state and avoidant state. In the intermediate state, the nozzle can be hinged so that a first portion of the fluid interacts with the turbine and / or basin and a second portion of the fluid flows directly into the body of water without interacting with the turbine and / or basin. The computer sub-system can control the state of the nozzle. For example, the nozzle can be controlled to guide a consistent flow or volume of fluid through the turbine and / or basin so that the turbine generates a consistent power level where the discharge flow may be variable. The nozzle can also be controlled to telescopically collapse or expand to protect the nozzle during transportation or drilling operations. In some nozzles, the size of the nozzle outlet is controlled by the computer sub-system, for example to increase or decrease the diameter of the nozzle outlet.

[0095] While a barge for offshore drilling operations has been described, some barges are include and / or transport maintenance equipment (e.g., maintenance barges). Maintenance barges are similar to the drilling barges, however, maintenance barges do no connect to the wellbore or casing. Maintenance barges include a fluid pump, for example a jockey pump, for intaking seawater at the opening in the floor of the barge.

[0096] A number of embodiments have been described. Nevertheless, it will be understood that various modifications may be made without departing from the spirit and scope of the disclosure. Accordingly, other embodiments are within the scope of the following claims.

Examples

Embodiment Construction

[0027]Offshore barges transport drilling equipment and facilitate offshore hydrocarbon drilling operations in large bodies of water. The disclosed barge includes a primary fluid circuit contained within and mounted to a barge housing. The primary fluid circuit intakes, stores, and discharges fluid used in offshore drill operations. The primary fluid circuit can be a horizontal water (fluid) discharge system which discharges fluid from the housing of the barge, into the body of water. The barge also includes a fluid recapture system (fluid recapture arrangement) that redirects and recaptures at least a portion of the fluid discharged from the barge housing by the primary fluid circuit. The fluid recapture system can decrease the total energy consumption of the barge by rerouting discharged fluid into the primary fluid circuit and by converting hydrostatic energy of discharged fluid into mechanical (rotational) power sufficient to power a fluid pump. In this configuration, the fluid r...

TECHNICAL FIELD

[0001] This disclosure relates to fluid systems in offshore barges, and more particularly to fluid recapture systems in offshore barges.BACKGROUND

[0002] Hydrocarbon production operations at an offshore drilling site requires the use of barges for both drilling operations and maintenance operations. Mobile offshore drilling units (MODUs) are self-contained floatable or floating drilling machines. MODUs can include jackups, semisubmersibles, and submersibles. Jackups are combination drilling rig and floating barge, fitted with long support legs that can be raised or lowered independently of each other. The jackup is towed onto location with its legs up and the barge section floating on the water. Upon arrival at the drilling location, the legs are jacked down onto the seafloor, preloaded to securely drive them into the seabottom, and then all legs are jacked further down. Since the legs have been preloaded and will not penetrate the seafloor further, this jacking down of the legs has the effect of raising the jacking mechanism and attached to the barge and drilling package. The entire barge and drilling structure are slowly raised above the water to a predetermined height above the water, so that wave, tidal and current loading acts only on the relatively small legs and not the bulky barge and drilling package.SUMMARY

[0003] The disclosure relates to a fluid recapture system arranged in a drilling or maintenance barge used in offshore drilling operations. The fluid recapture system includes a translation sub-system, a recirculation sub-system, and an energy conversion sub-system. The translation sub-system moves the recirculation and energy conversion sub-system into alignment with a discharged water stream exiting the barge from an elevated position. The energy conversion sub-system interacts with the discharged fluid to rotate a turbine and transfer the rotational energy generated by the turbine, a fluid pump of the recirculation sub-system. The recirculation sub-system captures at least a portion of the discharged fluid after the fluid interacts with the turbine and redirects the recaptured fluid into the barge for reuse. The fluid pump of the recirculation sub-system conveys the recaptured fluid from the exterior of the barge to the interior of the barge.

[0004] The fluid recapture system can decrease the overall load of a barge by reducing the amount of fresh sea water taken from a surrounding body of water. Fresh seawater is be used as a coolant during various operations performed by the barge or equipment carried by the barge. The fluid recapture system is self contained and at least partially self powered. As such, the fluid recapture system can reduce the overall fluid pump load of the barge during operations by providing a portion of the seawater coolant volume at little to no power costs

[0005] In certain aspects, a fluid recapture system includes a translation sub-system, a recirculation sub-system, and an energy conversion sub-system. The translation sub-system has a moveable platform on which the recirculation sub-system and energy conversion sub-system are mounted. The recirculation sub-system has a fluid line with a first end, a second end, and a fluid channel extending from the first end to the second end. A basin of the recirculation sub-system is attached to the second end of the fluid line and fluidly connects to the fluid channel of the fluid line. The recirculation sub-system also includes a fluid pump disposed on the fluid line. The fluid pump is operable to convey fluid from the basin to the first end of the fluid line. The energy conversion sub-system includes a turbine and a transmission. The turbine is aligned with the basin. The transmission is connected to the fluid pump and is connected to the turbine. The transmission is operable to power the pump.

[0006] Some fluid recapture systems also include a nozzle having an inlet configured to receive a discharged fluid and an outlet configured to expel the discharged fluid. A fluid channel can extend between the inlet and outlet. Some outlets of the nozzle define a nozzle axis. In some systems, the basin and the turbine are arranged on the nozzle axis. In some systems, the turbine is arranged between the nozzle and the basin.

[0007] Some fluid recapture systems also include a shield mounted on the turbine. The shield can have a diameter greater than a diameter of the turbine.

[0008] Some fluid recapture systems also include a flexible connector. The flexible connector can be mounted to the first end of the fluid line. In some systems, the flexible connector fluidly connects the fluid channel of the fluid line to a primary fluid circuit of a barge.

[0009] In certain aspects, a fluid recapture system includes a translation sub-system, a recirculation sub-system, an energy conversion sub-system, and a computer sub-system. The translation sub-system includes a moveable platform and a motor operable to move the moveable platform in a first direction and a second direction, opposite the first direction The recirculation sub-system is mounted to the moveable platform and includes a fluid line having a first end, a second end, and a fluid channel extending from the first end to the second end. The recirculation sub-system also includes a basin attached to the second end of the fluid line and fluidly connect to the fluid channel of the fluid line. The energy conversion sub-system is also mounted to the moveable platform and includes a turbine aligned with the basin. The computer sub-system is operable to control the translation sub-system, the recirculation sub-system, and the energy conversion sub-system. The computer sub-system includes a controller, one or more processors, and a non-transitory computer-readable medium storing instructions executable by the one or more processors to perform operations. The operations include determining an elevation of the fluid recapture system relative to a surface of a body of water and prompting the translation sub-system to move in the first or second direction.

[0010] Some fluid recapture systems also include a fluid pump disposed on the fluid line. The fluid pump can be operable to convey fluid from the basin to the first end of the fluid line. Some fluid recapture systems also include a transmission connected to the fluid pump and connected to the turbine. The transmission can be operable to power the pump. Fluid recapture systems can also include a nozzle defining a fluid channel and an outlet. The outlet can define a nozzle axis. The basin and the turbine can be arranged on the nozzle axis. The operations determining a position of the translation sub-system and prompting the moveable platform to move a predetermined distance in the first or second direction based on at least the position of the translation sub-system.

[0011] Some fluid recapture systems also include rails. The moveable platform can be mounted on the rails and / or can be moveable relative to the rails.

[0012] In certain aspects, a barge includes a barge housing with walls having a discharge wall defining an exit port, a cover, and a base. The walls extend between the cover and the base to define an interior volume of the barge housing. The barge also includes a primary fluid circuit arranged in the interior volume of the housing. The primary fluid circuit is fluidly connected to the exit port. The barge also includes a fluid recapture system with an exposed portion arranged outside the interior volume of the housing and a housed portion arranged in the interior volume of the housing. The exposed portion includes an impeller, a shield mounted on the impeller, and a basin aligned with the impeller. The housed portion includes a translation sub-system having a moveable platform, a transmission mechanically connected to the impeller by a shaft, and a flexible connection fluidly connecting the basin to the primary fluid circuit.

[0013] In some barges, the flexible connection and the basin are connected by a fluid line, A fluid pump can be disposed on the fluid line. In some barges, the impeller is operable to power the fluid pump. In some barges, the transmission is operable to power the fluid pump. The impeller can be operable to power the transmission. The impeller can have multiple blades that extend from an impeller hub and are arranged equidistant around the hub.

[0014] Some barges also include a nozzle mounted to an exterior face of the discharge wall. The nozzle can be aligned with the exit port.

[0015] In some barges, the discharge wall comprises an impeller recess sized to receive the impeller. The discharge wall can define a shaft opening in the impeller recess sized to receive the shaft.

[0016] In some barges, the discharge wall comprises a collector recess sized to receive the basin. In some barges, the collector recess comprises a recess wall and a ledge. The recess wall can define a fluid line opening sized to receive a fluid line connecting the flexible connection with the basin. In some barges, the fluid line rests on the ledge.

[0017] In certain aspects, a barge includes barge housing and a fluid recapture system. The fluid recapture system includes a turbine with an impeller. The impeller a hub, multiple blades extending from the hub, a shaft having a first end and a second end, and a shield mounted to the impeller. The impeller is mounted to second end of the shaft. The shaft and the impeller are rotationally coupled. The impeller is arranged between the shield and the shaft. The fluid recapture system also includes a generator and a fluid pump. The generator is connected to the first end of the shaft. The shaft is rotatable relative to the generator. The turbine powers the fluid pump through the generator The fluid recapture system is moveable relative to the barge housing.

[0018] The details of one or more embodiments are set forth in the accompanying drawings and the description below. Other features, objects, and advantages will be apparent from the description and drawings, and from the claims.BRIEF DESCRIPTION OF DRAWINGS

[0019] FIGS. 1A and 1B are a perspective views of a barge having a fluid recapture system in the floating position and the lifted position, respectively.

[0020] FIGS. 2A and 2B are perspective side views of the fluid recapture system in the retracted and extended position, respectively.

[0021] FIG. 3 is a cross sectional view of the barge with a primary fluid circuit connected to the fluid recapture system in the extended position.

[0022] FIG. 4 is a view of an operational logic procedure for operating a fluid recapture system.

[0023] FIG. 5A is a cross sectional side view of the barge in the floating position and the fluid recapture system in the restricted position.

[0024] FIG. 5B is a cross sectional side view of the barge in the lifted position and the fluid recapture system in the retracted position.

[0025] FIG. 5C is a cross sectional view of the barge in the lifted position and the fluid recapture system in the extended position.

[0026] Like reference symbols in the various drawings indicate like elements.DETAILED DESCRIPTION OF THE DRAWINGS

[0027] Offshore barges transport drilling equipment and facilitate offshore hydrocarbon drilling operations in large bodies of water. The disclosed barge includes a primary fluid circuit contained within and mounted to a barge housing. The primary fluid circuit intakes, stores, and discharges fluid used in offshore drill operations. The primary fluid circuit can be a horizontal water (fluid) discharge system which discharges fluid from the housing of the barge, into the body of water. The barge also includes a fluid recapture system (fluid recapture arrangement) that redirects and recaptures at least a portion of the fluid discharged from the barge housing by the primary fluid circuit. The fluid recapture system can decrease the total energy consumption of the barge by rerouting discharged fluid into the primary fluid circuit and by converting hydrostatic energy of discharged fluid into mechanical (rotational) power sufficient to power a fluid pump. In this configuration, the fluid recapture system can be fully or partially self-powered by harnessing the energy of the existing high-pressure discharge fluid exiting from the barge to the sea, and simultaneously using that energy to convey a portion of the discharged water back to the main circulation tank of the barge.

[0028] FIG. 1A is a perspective view of a barge 100 in a floating (first) position. In the floating position, the barge 100 can be powered by a barge motor (not shown) to move within a body of water to an offshore well or drilling site. The barge 100 includes a housing 102 having multiple (side) walls 104. The side walls 104 include a discharge wall 104a. The housing 102 also includes a ceiling (cover) 104b and a base (barge floor) 104c. The side walls 104, ceiling 104b, and base 104c at least partially define an interior volume 106. The walls 104 extend between the ceiling 104b and the base 104c. The base 104c is arranged between the ceiling 104b and the body of water (e.g., closer to the body of water, or contacting the body of water). Drilling equipment (not shown) can be mounted to an exterior surface 108 of the housing or arranged within the interior space of the housing.

[0029] Translatable legs 110 are mounted to the exterior of the housing 102. In the floating position of the barge 100, the legs 110 are raised relative to the base 104c and / or relative to the housing 102. The legs 110 may be mounted to rails on the exterior of the housing. In the floating a majority portion of the legs extend away from the base of the housing. In some floating position, the legs are at least partially submerged in a body of water. In some floating positions, the legs are arranged at a non-zero distance from the surface of the water). The legs 110 slide in a first (vertical) direction to extend into or out of a body of water and to move relative to the barge housing 102.

[0030] The housing 102 defines a well or casing opening (inlet) 112 in base 104c the housing 102. The opening 112 is (fluidly) connectable to a wellbore drilled in the floor of the body of water (not shown). In some cases, the opening is defined in the walls or ceiling of the housing. Some barges have multiple openings or inlets fluidly connecting the interior space with a connected pipe of casing. The opening can be releasably sealed to isolate the interior space of the housing from the environment (e.g., from a body of water). The housing 102 also includes an exit port 114 defined in the discharge wall 104a. The exit port 114 guides, conveys, and / or expels discharge fluid from a primary fluid circuit 116 (FIG. 3).

[0031] A nozzle 118 of the barge 100 is mounted to the exterior surface 108 of the discharge wall 104a. The nozzle 118 is aligned with or arranged on the exit port 114 such that the fluid exiting the exit port 114 enters the nozzle 118. The nozzle 118 is an L-shaped or curved nozzle. High pressure fluid exiting the exit port 114 is guided by the nozzle 118 from a horizontal direction (e.g., parallel to the body of water, perpendicular to the discharge wall) to a vertical direction (e.g., perpendicular to the body of water, parallel to the discharge wall). The nozzle 118 is mounted to the housing 102. The nozzle 118 is welded to the exterior surface 108 of the discharge wall 104a, however, some nozzles are integral with and / or part of the housing. Some nozzles extend through the housing exit port and a nozzle inlet is at least partially arranged in the interior volume of the housing. In some cases, the outlet discharges or expels fluid in a first direction and the nozzle redirects the discharged or expelled fluid into a second direction. The first direction can be different from the second direction.

[0032] The barge 100 includes a computer sub-system 150 and fluid recapture system 200 for recapturing at least a portion of fluid discharged from the nozzle 118. The fluid recapture system 200 is moveable relative to the housing 102, discharge wall 104a, and / or the primary fluid circuit 116 (FIG. 3). The fluid recapture system can include the nozzle. The fluid recapture system 200 includes a housed (first) portion 202 (e.g., a housed arrangement) and an exposed (second) portion 204 (e.g., exposed arrangement). The housed portion 202 is arranged and / or fixed in the interior volume 106 of the barge housing 102 of the barge 100. The exposed portion 204 is arranged or fixed outside the interior volume 106 of the barge housing 102.

[0033] In some cases, the fluid recapture system includes a transitional (third) portion (e.g., a transitional arrangement). The transitional portion is arranged in the interior volume of the barge housing in some positions of the moveable fluid recapture system and arranged exterior to the housing (e.g., outside the interior volume of the housing) in other position of the moveable fluid recapture system. For example, in a first (retracted) position of the fluid recapture system, the housed and transitional portions may be arranged in interior volume of the barge housing and the exposed position may be arranged outside the barge housing. In a second (extended) position of the fluid recapture system, the housed portion may be arranged in the interior volume and the transitional portion and exposed portion may be arranged outside the barge housing.

[0034] The computer sub-system 150 includes a controller 152, one or more processors 154, and a non-transitory computer-readable medium storing instructions executable by the one or more processors to perform operations. The operations can include determining an elevation of the fluid recapture system relative to a surface of a body of water; and prompting the translation sub-system to move in the first or second direction. The computer sub-system can also determine the position of the translation sub-system and prompt the translation sub-system to move in a first or second direction by a predetermined distance. The fluid recapture system 200 is operably connected and controllable by the computer sub-system 150. The legs 110 are also operably connected and controllable by the computer sub-system 150. The computer sub-system can also connect and / or control mounted drilling, transport, and / or other operational equipment on or in the barge.

[0035] FIG. 1B is a perspective view of the barge 100 in the lifted (second) position. In the second position, the legs 110 slide along the walls 104 of the housing 102 towards and past the base 104c of the housing 102. In the lifted position, the legs 110 of the barge extend into the body of water and contact the floor of the body of water. The legs 110, after contacting the floor, press the barge housing away from a surface of the body of water such that the base 104c of the housing 102 is a non-zero and / or predefined distance dlifted (FIGS. 5B and 5C) from the surface of the body of water.

[0036] FIGS. 2A and 2B are a perspective views of the fluid recapture system 200 in a (first) retracted position and a (second) extended position, respectively. In the retracted position, the exposed portion 204 of the fluid recapture system 200 mates with the exterior face 208 of the discharge wall 104a. The releasable engagement or mating of the discharge wall 104a with the exposed portion 204 of the fluid recapture system 200 protects the fluid recapture system from the environment during transportation and other operations. In the extended position, the exposed portion 204 of the fluid recapture system 200 is at least partially aligned with the nozzle 118 (FIGS. 3 and 55910C). In the extended position, the exposed portion 204 of the fluid recapture system 200 at least partially aligns with the nozzle 118 (FIGS. 1A, 1B, and 3) so that fluid discharged from the nozzle 118 contacts at least a part of the exposed portion 204 of the fluid recapture system 200. The discharged fluid is pressurized and exits the nozzle 118 at an elevated location relative to the fluid recapture system 200. The fluid recapture system 200 is operable to capture at least a portion of the energy of the discharge fluid and convert the hydrostatic energy into mechanical power. The fluid recapture system 200 also recirculates the captured fluid into the primary fluid circuit 116 of the barge 100 using the converted mechanical power. The recapture and recirculation of the discharged fluid can reduce the energy load operating the primary fluid circuit, for example, by reducing the energy load of fluid pumps in the primary fluid circuit when drawing and conveying fresh fluid from the surrounding body of water.

[0037] Some recapture systems interact with about 5% to about 100% of the discharged fluid for generating power. In some cases, for example, about 25% to about 50%, about 10% to about 90%, about 20% to about 75%, about 20% to about 90%, about 40% to about 80%, about 30% to about 75%, about 40% to about 90%, about 50% to about 90%, about 50% to about 75%, about 50% to about 80%, or about 25% to about 90% of the discharge fluid interacts with the fluid recapture system generate (recapture) energy of the discharged fluid. In some cases, the fluid recapture system is operable interact with at least about 5%, at least about 10%, at least about 20%, at least about 25% at least, about 30%, at least about 40%, at least about 50%, at least about 60%, at least about 70% at least about 75%, at least about 80%, or at least about 90% of the discharged fluid from the nozzle.

[0038] Some recapture systems recollect (recapture) about 1% to about 100% of the discharge fluid expelled from the nozzle (e.g., about 25% to about 50% of the discharge fluid). For example, the fluid recapture system can collect about 10% to about 80%, about 15% to about 75%, about 20% to about 10% to about 90%, about 20% to about 75%, about 20% to about 90%, about 40% to about 80%, about 30% to about 75%, about 40% to about 90%, about 50% to about 90%, about 50% to about 75%, about 50% to about 80%, or about 25% to about 90% of the discharge fluid for recirculation and reuse in barge operations. In some cases, the fluid recapture system is operable to recapture at least about 5%, at least about 10%, at least about 20%, at least about 25% at least, about 30%, at least about 40%, at least about 50%, at least about 60%, at least about 70% at least about 75%, at least about 80%, or at least about 90% of the fluid discharged from the nozzle.

[0039] Some recapture systems recollect (recapture) an amount of discharge fluid proportional to the total amount of fluid used in the barge. For example, the recapture system may provide about 25% to about 50% of the total fluid used in the primary fluid circuit of the barge. In some cases, the fluid recapture system is operable to recapture about 1% to about 100% of the total volume of fluid used in barge operations. The fluid recapture system can collect and / or provide about 10% to about 80%, about 15% to about 75%, about 20% to about 10% to about 90%, about 20% to about 75%, about 20% to about 90%, about 40% to about 80%, about 30% to about 75%, about 40% to about 90%, about 50% to about 90%, about 50% to about 75%, about 50% to about 80%, or about 25% to about 90% of the total fluid volume used in barge operations or used by be primary fluid circuit in barge operations.

[0040] The fluid recapture system 200 includes a translation sub-system 210, an energy conversion sub-system 212, and a recirculation sub-system 214. The energy conversion sub-system 212 and the recirculation sub-system 214 are mounted to or arranged on the translation sub-system 210. The translation sub-system 210 is operably connected and controlled by the computer sub-system 150. The translation sub-system 210 is moveable relative to the discharge wall 104a to move the fluid recapture system 200 between the extended and retracted positions.

[0041] The translation sub-system 210 includes a moveable platform 220 mounted on a guiding structure. The guiding structures can be part of the translation sub-system, part of the barge housing, or separate from both translation sub-system and barge housing. The guiding structure in the barge 100 are rails 222 mounted to the base 104c of the barge housing 102. The moveable platform 220 includes a first wheel 224 and a second wheel 226. The rails 222 include a first rail 228 and second rail 230 each rail 228, 230 defining a groove 232. The groove 232 on the first rail 228 is sized to receive the first wheel 224. The groove 232 on the second rail 230 is sized to receive the second wheel 226. The rails 222 are fixed to (e.g., attached to or integral with (the base 104c of the barge housing (FIG. 1A). The rails can be bolted to the barge housing or welded to the barge housing. The wheels 224, 226 move within the grooves 232 of the rails 222 to move the platform 220 in a forward (first) direction and backwards (second) direction. The second direction is opposite the first direction. In this configuration, the moveable platform 220 translates in the forward direction towards the discharge wall 104a (FIG. 1A) of the barge housing 102 (FIG. 1A). The moveable platform 220 translates in the backwards direction, away from the discharge wall 104a (FIG. 1A).

[0042] The translation sub-system 210 includes a driver for moving recapture sub-system 200 between positions (e.g., between the first, retracted position and the second, extended position). In the translation sub-system 210, the driver is a motor 234 connected to the first and second wheels 224, 226. The motor 234 is operably connected to and controlled by the computer sub-system 150. In use, the computer sub-system 150 prompts the motor 234 to move or terminate movement of the wheels 224, 226.

[0043] The energy conversion sub-system 212 and recirculation sub-system 214 are translationally fixed to the moveable platform 220. In this configuration, movement of the platform 220 along the rails 222 also translates the energy conversion sub-system 212 and the recirculation sub-system 214 in the same direction relative to the barge housing 102 and / or the discharge wall 104a. The rails can include wheel stops and / or speed bumps arranged at a location on the rails that correspond with the extended and retracted positions.

[0044] In some systems, the energy conversion sub-system and the fluid recirculation sub-system are moveable relative to each other. For example, the translation sub-system can include a first moveable platform and a second moveable platform translatable relative to each other and relative to the discharge wall 104a. The energy conversion sub-system can be arranged on or mounted to the first moveable platform. The fluid recirculation sub-system can be arranged on or mounted to the second moveable platform. In some cases, the translation sub-system is an expandable or slidable connection (e.g., hydraulically powered movement or pistons) rather than a moveable platform. In some cases, the moveable platform includes continuous track (caterpillar tread, tank treads) rather than wheels to move the moveable platform. While the translation sub-system has been described as guided by rails, some translation sub-systems can be steerable or fixed to a different guiding structure.

[0045] The rails can include triggers and / or sensors indicating the platform location relative to the rails. The triggers and / or sensors are operable to connect to the computer sub-system and to transmit platform position data generated by the triggers and / or sensors. Position sensors of the translation sub-system can transmit (platform) translation data to the computer sub-system. The computer sub-system can determine and / or identify the position of the fluid recapture system at least partially based on the translation data. The translation sensors can include contact sensors, pressure sensors, acoustic sensors, magnetic sensors, and / or conductive sensors that measure or sense the position of the wheels relative to the rails. In some cases, the wheels include rotational sensors for measuring a rotation rate or revolution count. The rotation sensors can transmit rotational data generated by the rotation sensors to the computer sub-system and the computer sub-system can determine a velocity, distance, and / or acceleration of the translation sub-system based at least in part, on the received rotational data. In some cases, the guiding structure (rails) of the translation sub-system include wheel stops at a first location on the guiding 11 tructuree and a second location of the guiding structure. The first location can correspond to one of the retracted or extended position of the fluid recapture system and the second location can correspond to the other one of the retracted or extended position of the fluid recapture system.

[0046] The energy conversion sub-system 212 is mounted on the moveable platform 220. The energy conversion sub-system is translationally fixed to the moveable platform 220 such that movement of the moveable platform 220 also moves the energy sub-system 212.

[0047] The energy conversion sub-system 212 includes an energy capture unit and an energy converter unit. The energy capture unit in the energy conversion sub-system is a turbine 236. The energy converter unit is a transmission 237. Some energy capture units are water wheels, impellers, propellers, fans, heat plates, or thermal batteries. Some energy converter units are mechanical energy converter units for receiving mechanical energy and outputting mechanical energy (e.g., translational or rotational energy).

[0048] The turbine 236 includes a shaft 238 and an impeller The impeller 240 is mounted, fixed to, or integral with the shaft 238 by a keyway (e.g., a keyway connection). The impeller 240 and shaft 238 are rotationally coupled by the keyway. In this configuration, rotation of the impeller 240 also rotates the shaft 238 via the keyway connection. Keyway connections can include a key seat (e.g., a groove embedded in the shaft or impeller), a key, and a keyway (e.g., a groove embedded in the impeller or shaft). Some shafts and impellers are rotationally connected by another connector or connection (e.g., a clutch connection, weld connection, or other mechanical connection). In some sub-systems, the shaft and impeller are connected by linkages that transfer the rotational force of the impeller to the shaft. In this configuration, the rotational speed of the impeller can be different from the rotational speed of the shaft (e.g., faster, or slower).

[0049] The shaft 238 extends from a first (exposed) end 242 to a second (housed) end 244. The impeller 240 is mounted to the first end 242 of the shaft 238. The first end 242 of the shaft 238 and the impeller 240 are arranged outside or external to the interior volume 106 of the barge housing 102. In this configuration, the impeller 240 and first end 242 are arranged adjacent to the external face 208 of the discharge wall 104a. The second end 244 is arranged in the interior volume 106 of the barge housing 102. The shaft 238 is slidable relative to the barge housing 102 (FIGS. 3 and 5A-C) through a shaft aperture (FIG. 3) defined in the housing 102 (FIG. 3).

[0050] The impeller 240 includes a hub 246 attached to the second end 244 of the shaft 238. In some cases, the impeller is a water wheel or a propeller. Multiple blades 248 extend radially from the hub 246 and terminate in tips 250. Some blades are angled. The blades 248 are arranged equidistant around the hub 246. A first rim 252 and a second rim 254 each slidably connect to the tips 250 of the blades 248 such that the blades 248 are rotationally constrained to the rims 252. The blades can be connected to the rims by a cam and track (e.g., protrusion and groove) connection. The first and second rim can be arranged on or adjacent to the tips. The first end 242 and the second end 244 of the shaft 238 define a shafted axis 256. The hub 246 first rim 252, and second rim 254 are centered on the shaft axis 256. The hub 246 is arranged concentrically relative to the first and second rims 252, 254. The first rim 252 is arranged between the exterior face 208 of the discharge wall 104a and the second rim 254. The first rim 252 is fixed a distance drims from the second rim 254. The distance drims can be about equal to a width of the blades. The first rim and second rims 252, 254 define a slot 258 through which discharged fluid can pass. The slot 258 can be about equal to a width of the blades or less than the width of the blades.

[0051] The turbine 136 also includes a shield 260 mounted to the impeller 240 at the second rim 254. The shield is domed and connects to the second rim 254 of the impeller 140. An edge 262 of the shield 260 includes a mating surface for releasably engaging the shield with the exterior face 208 of the discharge wall 104a. In the shield 260 the mating surface is a seal ring (not shown). The seal engages with the exterior face 208 of the discharge wall 104a and isolates the impeller and shaft from the environment when the fluid recapture system is in the retracted position. The shield 260 also includes a surface 266 oriented away from the impeller 240 and barge housing 102. The surface 266 is a rubber surface that protects the impeller 240 from the environment, for example, during transportation. In some cases, the shield is made of or includes rubber. In some recapture systems, the shield is separate from the turbine. In some cases, the shield is mounted to the hub.

[0052] The transmission 237 (gearbox) includes a set of gears (gear set) for adjusting the speed and / or direction of the rotational energy of the turbine 236. The transmission 237 connects to the pump 146 and transfers mechanical energy from the transmission 237 to the pump 146. For example, the transmission 237 rotates the pump 146.

[0053] Some energy converters, for example, electric generators, can convert rotational motion of the turbine into electrical energy. Electric generators receive rotational motion from the turbine and produce electric power which can be used to charge batteries or power other electrical equipment. Some energy converters are operable to convert the rotational motion of the turbine into other mechanical motion and / or electrical power (e.g., to power a motor, battery, or other electrical power source).

[0054] The turbine size and operational parameters (e.g., rotational speed capacity), can be proportional to the barge size and desired fluid volumes in the primary fluid circuit. Water pressure and velocity can also determine the nozzle size, impeller size, and shaft size.

[0055] Energy converters of the energy conversion sub-system can be connected (directly or indirectly) to at least one pump of the recirculation sub-system for conveying recollected discharge fluid into the interior volume of the barge housing. In direct connection, the power output by the energy converter transfers directly to the fluid pump. In indirect connection, the power output by the energy converter charges a battery and the battery is operable to power a motor of the fluid pump. In direction connection, the power output by the energy converter is equal to the power received by the pump. In indirect connection, the power output by the energy converter may or may not be equal to the power received by the fluid pump.

[0056] In the energy conversion sub-system 212, the energy converter is the transmission 137 which is directly connected to a recirculation pump 146 of the recirculation sub-system 214. In direct connection, the output power of the transmission 237 is equal to the input power received by the pump 146.

[0057] In a direct connection configuration of the fluid recapture system, increases and decreases in output power generation by the transmission generate proportional changes in input power received by the recirculation pump. As such, increased flow rates or increased fluid volumes of the expelled fluid can increase the rotational energy captured by the turbine and increase the volume of fluid captured by the basin. The turbine transfers the increased (rotational) energy to the transmission. The transmission, due to the direct connection configuration, proportionally transfers the increased energy to the pump. The pump, due to the increased fluid rate or fluid volume of the expelled fluid also has a higher load requirement to transfer an increased volume of recovered fluid form the basin to the main tank of the primary fluid circuit. The increased load requirement is offset by the proportional increase in power the pump receives from the transmission. In this configuration, the recapture sub-system increases or decreases power generation proportionally as the load required to move the recovered fluid increases or decreases, respectively. The fluid recapture system can convey variable amounts of discharge fluid without increasing the overall energy load of the barge.

[0058] The recirculation sub-system 214 includes the fluid pump 146 (e.g., at least one fluid pump) arranged on a fluid line 270. The fluid line 270 extends from a first (housed) end 272 to a second (exposed) end 274. The first end 272 is arranged in the interior volume of the housing 102. The second end 274 is arranged outside the interior volume of the housing (e.g., outside the housing 102. The fluid line 270 defines a fluid channel 276 extending from the first end 272 to the second end 274 of the fluid line 270. The fluid channel is operable to guide fluid from the second end of the fluid line to the first end of the fluid line (e.g., from the basin to the primary fluid circuit).

[0059] Recirculation sub-systems also include a collector or collector body that is vertically aligned with the impeller. In the recirculation sub-system 214, collector is a basin 280. The basin 280 includes a body 282 having a first open end 284 and a second open end 286. The first open end 284 defines a mouth (first opening) 288 having a mouth cross section. The basin 280 has a rectangular cross sectional, however, other basins or collectors can have a cross sections of a different shape. The second end 286 of the basin 280 defines a drain 290 (second opening, drainage hole) having a drain cross section. The drain cross section is circular, however, other drain cross sections can be a different shape. The area of the mouth cross section is greater than the area of the drain cross section.

[0060] The basin 280 connects to the second end 286 of the fluid line 270 at the drain of 290 of the basin 280. The second end of the fluid line and / or the second end of the basin can also include at least one connector for engaging and fluidly connecting the basin to the fluid line. The basin 280 vertically aligns with the nozzle 118 in the extended position so that at least part of the fluid discharged by the nozzle is collected or recovered by the basin 280. In some basins, the second end also includes a valve at the drain of the basin for controlling a flow of collected fluid. The basin may include a grate or filter arranged over the mouth to prevent the basin from retaining solid debris.

[0061] The recirculation sub-system also includes the fluid pump 146. The fluid pump 146 is operably connected to and controlled by the computer sub-system 150. The fluid pump is powered by the power converter (e.g., the output power of the power converter). The energy converter is mounted on or attached to the fluid pump 146. The fluid pump is operable to convey fluid from the basin at the second end of the fluid line to the first end of the fluid line.

[0062] The recirculation (recovery) sub-system 210 includes a flexible connector 294 (e.g., expandable connector, compressible connector, stretchable connector) arranged in the interior volume 106 at the first end 272 of the fluid line 270. The flexible connector 294 can be integral with the fluid line or attached to the fluid line. In some cases, the flexible connector 294 is separate from the recirculation sub-system. The flexible connector 294 has a compressed state (FIG. 2A) and an expanded state (FIG. 2B). The flexible connector 294 is in the compressed state when the fluid recapture system 200 is in the retracted position. The flexible connector 294 is in the expanded state when the fluid recapture system 200 is in the extended state. The flexible connector 294 moves between the compressed and expanded state as the translation sub-system 210 moves the fluid recapture system 200 between the retracted and expanded position, respectively. The flexible connector 294 fluidly connects the first end 272 of the fluid line 270 with the primary fluid circuit 116 (FIG. 3) of the barge 100. In some barges, the flexible connector fluidly connects the recirculation sub-system to the primary fluid circuit of the barge.

[0063] The flexible connector 294 includes an expandable body that stretches (expands) or contracts (compresses). The flexible connector can include or be made of an elastic material and / or can include a bellows section (e.g., accordion section). The flexible connector defines a channel extending through the body of the flexible connector to fluidly connect the first end 272 of the fluid line 270 with the primary fluid circuit. Some flexible connectors are attached to a valve configured to control the fluid connection between the fluid recapture system and the primary fluid circuit of the barge. The valve may be located on a rigid pipe connected to the flexible connector.

[0064] FIG. 3 is a cross sectional side view of the barge 100 with the primary fluid circuit 116, the fluid recapture system 200, and the nozzle 118. The fluid recapture system 200 is in the extended position so that the impeller 240 and the basin 280 are vertically aligned with the nozzle 118. The flexible connector 294 is in the expanded state. The flexible connector 194 fluidly connects the basin to the primary fluid circuit 116 via the fluid line 270.

[0065] The discharge wall 104a of the housing 102 defines an impeller (first) recess 296 and a collector (second) recess 297. The impeller recess 296 is sized to receive the impeller 140. In some barges, the impeller recess is sized to receive the impeller and a portion of the shaft (e.g., the exposed portion of the fluid recapture system). The housing 102 also defines a shaft opening 298 defined in the impeller recess 296 of the housing 102. The shaft opening 298 is sized to receive the shaft 138. The shaft 138 is slidable through the shaft opening 298. The housing also defines a fluid line opening 299 in the collector recess 297 sized to receive the fluid line 270 of the recirculation sub-system. The collector recess 297 includes a ledge 297a and an inner wall 297b. The fluid line opening 299 is arranged in the inner wall 197b adjacent the ledge 197a. The fluid line 270 sits on the ledge 297a and is slidable relative to the ledge 197b. The ledge can provide structural support to the fluid line.

[0066] The primary fluid circuit 116 includes a primary fluid pipe 300 extending from the opening 112 in the base 104c of the barge housing 102 to the exit port 114 defined in the discharge wall 104a of the barge housing 102. The primary fluid pipe 300 is arranged in the interior volume 106 of the barge and is operable to guide pressurized fluid 304 from the opening 112 to the exit port 114. Fluid flowing the in the primary fluid circuit can be water, sea water, or a waste fluid. The fluid 304 flowing in the circuit 116 is seawater 304a.

[0067] The primary fluid circuit also includes a (seawater) pump 306 (fluid pump) disposed on the fluid pipe 300. The seawater pump 306 is operable to draw in and convey seawater from a casing 308 connected to the opening 112 into the interior volume of the fluid circuit. The seater pump can pressurize the fluid flowing in the primary fluid circuit.

[0068] The primary fluid circuit 116 has a main circulation tank 310 arranged downstream of the seater pump 306. The main circulation tank 310 is sized to retain of seawater 304 prior to use in barge operations. The seawater 304 then flows from the main circulation tank 310 to downstream operations where the seawater is used (e.g., consumed) for cooling purposes The seawater can also be used for other maintenance or operations other than cooling. After using the seawater in operations, the seawater continues to flow through to primary fluid circuit towards the exit port 114. At the exit port 114, the consumed seawater 304 is discharged into the nozzle 118 mounted to the exterior face 208 of the discharge wall 104a. The nozzle receives discharged fluid (discharged seawater) 304b and redirects the discharged fluid 304b to the fluid recapture system 200.

[0069] The nozzle 118 defines a fluid channel 320 extending from a nozzle inlet 322 (first aperture, inlet body) to a nozzle outlet 324 (second aperture, outlet body). The nozzle outlet 324 is arranged at a predetermined distance dnoz from the discharge wall 104a (e.g., a fixed distance from an exterior face 208 of the discharge wall of the housing). The fluid channel 320 receives, directs, and expels the discharged fluid 304b (e.g., fluid discharged from the exit port of the barge housing).

[0070] The nozzle outlet 324 defines a nozzle axis 328. In the extended position, the basin 280 and the impeller 240 are aligned with the nozzle axis 328. In some systems, the nozzle axis intersects at least a part of the basin and / or impeller intersect the axis. In some barges, the basin and / or impeller are centered on the nozzle axis.

[0071] The nozzle inlet 322 defines an intake axis 330. The intake axis 330 is perpendicular to the nozzle axis 328 and the nozzle 118 forms an L-shape. In some systems, the outlet axis is angled relative to the intake axis. In some cases, the nozzle axis is parallel with or arranged on the intake axis. In some cases, the exit port of the housing defines the intake axis. In some barges, the exit port and the nozzle inlet define the intake axis.

[0072] The nozzle outlet 324 directs and expels discharge fluid 304b to the impeller 240 of the turbine 236. Expelled discharge fluid 304c expelled from the nozzle outlet 324 (expelled fluid 304c) forms a flow path 340 outside the barge 100. At least a portion of the impeller 240 intersects the first flow path 340 of the expelled fluid 304c (free falling discharge fluid). The interaction between the expelled fluid 304c and the impeller 240 rotates the impeller 240 and the shaft 238. The rotation of the turbine 236 powers the pump 146 via the energy converter. The expelled fluid 304c falling from the impeller 240 forms a second flow path 342. In some cases, some expelled fluid may avoid interaction with the impeller and joins or partially forms the second flow path. At least a portion of the basin 280 intersects the second flow path 342. In the barge 100, at least a portion of the mouth 288 (e.g., the mouth cross section) intersects the second flow path 342 and recovers at least a portion of the expelled fluid 304c. The recovered fluid 304d (e.g., the expelled fluid recaptured by the fluid recapture system) is conveyed by the fluid pump 146 from the basin 280 to the main tank of the primary fluid circuit via the fluid line 270 and flexible connector 294. The addition of the recovered fluid 304d to the seawater 304a in the main tank of the primary fluid circuit 116 can reduce the amount of fresh seawater 304 required to fill the tank, thereby reducing the energy load of the seawater pump and the total energy load of the barge 100.

[0073] [[Inventors: Based on your comments, I moved this paragraph above to the “alternate versions” section of this detailed description (generally starting at ¶0082). FIG. 4 is a view of a logic diagram 301 showing the electronic operation of the barge 100. The computer sub-system of the barge may prompt other components of the barge or components connected to the barge, in accordance with the logic diagram. The logic diagram 301 shows operation of the fluid recapture system 200 (FIGS. 2A-B) moving between the retracted position and the extended position while the barge 100 is in the lifted position.

[0074] In the logic diagram 301, the computer sub-system 150 controls motor switches to prompt a motor (FIG. 2A) of the fluid recapture system 200. When moving the fluid recapture system 200 from the retracted position to the extended position, the computer sub-system 150 confirms that the barge is in the lifted position then prompts the motor to move the fluid recapture system 200 in the forward (first) direction, towards the discharge wall 104a. The motor stops, or the computer prompts the motor to stop forward movement when a forward limit switch sensor is triggered. The motor stops and the fluid recapture system 200 has fully transitioned from the retracted position to the extended position.

[0075] Some systems terminate movement once the translation system has moved a predetermined distance. In this configuration, the computer sub-system determines that the translation sub-system has moved the predetermined distance from the retracted position, then prompts the translation sub-system to terminate movement. The movement of the translation sub-system by the predetermined distance also moves the exposed portion of the fluid recapture system the predetermined distance away from the exterior face of the discharge wall. The predetermined distance can be about the distance between the exterior surface of the discharge wall and the nozzle outlet (or an axis defined by the nozzle outlet). In some cases, the predetermined distance is about equal to the sum of a distance between the exterior surface of the discharge wall and the nozzle outlet (or an axis defined by the nozzle outlet), and at least half a width of the blade of the turbine (or a distance between the first and second rims, drim).

[0076] FIG. 5A is a view of the barge 100 in a body of water 350 in the floating position and the fluid recapture system 200 in the retracted position. In the floating position, the legs 110 of the barge 100 are raised and extend away from a surface 352 of a body of water. The barge 100 can move freely about the body of water 350 and transport drilling equipment to a site. The fluid recapture system 200 is in the retracted position. The impeller 240 is arranged in the impeller recess 196 of the discharge wall 104a and the basin 280 is arranged in the collector recess 297 of the discharge wall 104a. The shield 260 of the turbine 136 is engaged with the exterior face 208 of the discharge wall 104a and the exposed portion of the energy conversion sub-system 212 of the fluid recapture system 200 is fluidically isolated from the body of water 350. The flexible connection is in the compressed state. Once the barge 100 arrives at the site, the barge may transition from the floating position to the lifted position. The computer sub-system prompts the legs to translate or slide along the housing 102 towards the body of water 350. The legs 110 contact a floor of the body of water and continue to extend towards the body of water. The legs 110 continue to press towards the water 350 and the barge housing 102 lifts away from the surface 352 of the water. An air gap sensor can determine the height or distance between the surface 352 of the body of water 350 and the housing 102. Once a predetermined height or distance is achieved, the computer sub-system 150 prompts the legs 110 to terminate movement.

[0077] FIG. 5B is a cross sectional front view of the barge 100 in the body of water 350 in the lifted position. In the lifted position, the barge can perform operational and drilling procedures. The barge 100 includes a seawater pipeline extending from the floor of the barge housing 102. The seawater pipe 308 extends below the surface 352 of the body of water 350 to the opening 112 in the base 104c of the barge housing 102. Seawater pump of the primary fluid circuit 116 is operable to draw seawater 304 from the body of water 350 into the primary fluid circuit 116. Because the barge is in the lifted position, the recapture sub-system may move between the retracted position and the extended position.

[0078] To move from the retracted position to the extended position, the computer sub-system 150 prompts the translation sub-system 210 to move the moveable platform 220 a predetermined distance. In some cases, the predetermined distance is the distance between the impeller and / or basin and the nozzle axis when the fluid recapture system is in the retracted position. The translation sub-system moves the energy conversion sub-system and the recirculation sub-system the predetermined distance so that the basin and impeller are at least partially aligned with the nozzle axis. The flexible connector 294 remains connected to the static main fluid tank 247 of the primary fluid circuit 116 and remains connected to the translating first end 272 of the fluid line 270. To maintain these connections, the flexible connection 194 stretches or expands at least the predetermined distance.

[0079] FIG. 5C is a view of barge 100 in the body of water 350 in the lifted position and the fluid recapture system 200 in the extended position. In the extended position, the flexible connection is in the expanded state and maintains a fluid connection between the first end 272 of the fluid line 270 and the main tank of the primary fluid circuit. The fluid recapture system is operable and position to capture energy from expelled discharge fluid 304b and recover (capture) discharge fluid for recirculating into the primary fluid circuit.

[0080] While a translation sub-system with a wheels and rails has been described, some translation sub-systems include gears and racks for controlling movement of the translation sub-system relative to the housing.

[0081] While a translation sub-system with two states has been described, some translation sub-system can include additional states and / or positions. For example, some translation sub-systems can have an extended position that includes one or more sub-states that fully align, partially align, and / or fully unaligned the fluid discharge system with the nozzle. In this configuration, the computer sub-system can monitor the fluid recapture system in the extended position and pr the motor to move further in the first direction or an opposite second prompt the translation sub-system to move in the first or second direction relative to the discharge wall, thereby increasing or decreasing the amount of discharged water interacting with the turbine.

[0082] In some systems, the translation sub-system can move the recapture sub-system laterally to align the recaptures sub-system with a first and / or second fluid path.

[0083] In some barges, the size and cross section of the nozzle outlet is proportional or equal to the size and cross section of the mouth of the basin.

[0084] While a recapture system with an energy conversion sub-system has been described, some systems include multiple energy conversion units arranged vertically (e.g., long the nozzle axis) and / or or horizontally (e.g., perpendicular to the nozzle axis) on the exterior face 208 of the discharge wall. For example, an energy conversion sub-system can include at least two waterwheels or turbines arranged on the nozzle axis, offset from the nozzle axis. A first turbine may be arranged between the second turbine and the nozzle outlet. In this configuration, the expelled discharge fluid can interact with both turbines, either turbine, or neither turbine.

[0085] While an energy converter unit (transmission) for receiving rotational energy and transmitting rotational energy has been described by the transmission 237, some energy converter units receive rotational energy and transmit a movement energy (e.g., axial movement, or translation).

[0086] While an energy converter unit (transmission) for receiving mechanical energy and transmitting mechanical energy has been described by the transmission 237, some energy converter units receive mechanical energy and transmit electrical energy, magnetic energy, hydraulic energy, motional energy, thermal energy, elastic (spring energy), chemical energy, or electromagnetic energy.

[0087] In some energy conversion sub-systems, the energy converter unit is an electrical generator (generator) for producing electrical power from rotational motion. The electrical power (energy) produced or generated by the generator can be retained in a battery (not shown) such that the rotation of the turbine charges a battery connected to the generator. A battery in the energy conversion sub-system can reduce volatility in the power provided to the recapture sub-system. For example, variations in discharge fluid volume and discharge fluid flow rate can cause proportional variations in the power levels generated by the generator. A battery can store energy during periods of increased or peak power generation and can provide supplemental power in periods of decreased or low power generation. In this configuration, the power received by the fluid recapture system (e.g., the at least one pump of the reticulation sub-system, is more uniform and / or smooth as compared to a direct connection between the at least one pump and the generator.

[0088] The battery can be operatively connected to and controlled by the computer sub-system. The computer sub-system can determine a desired power output level (range) or receive a known power output level (range) of the battery based on received sensor data. The computer sub-system can receive a known power input range of the at least one pump of the recirculation sub-system or determine a desired power input level (range) of the pump of the recirculation sub-system. In some cases, electrical power produced or generated by the generator directly powers at least one pump in the fluid recirculation sub-system.

[0089] While a recapture system with an energy conversion sub-system has been described, some systems include multiple energy conversion sub-systems arranged vertically (e.g., long the nozzle axis) and / or or horizontally (e.g., perpendicular to the nozzle axis) on the exterior face 208 of the discharge wall.

[0090] While a recapture system with a recirculation sub-system has been described, some systems include multiple recirculation sub-systems arranged vertically (e.g., long the nozzle axis) and / or or horizontally (e.g., perpendicular to the nozzle axis) on the exterior face 208 of the discharge wall.

[0091] While a barge with a single recapture system has been described, some barges include multiple recapture systems arranged on the discharge wall or arranged on other walls.

[0092] While a recapture system having an energy conversion sub-system has been described, some recapture systems do not include an energy conversion sub-system. In such a configuration, the basin recovers at least a portion of the expelled fluid flowing in the first flow path.

[0093] While a recapture system having a recirculation sub-system has been described, some recapture systems do not include a recirculation sub-system. In such a configuration, the turbine can be used to charge a battery and the discharged fluid falls into the body of water. In some cases, the turbine can provide power to other components in the primary fluid circuit (e.g., the seawater pump) and / or the barge 100.

[0094] While a fixed, L-shaped nozzle has been described, some nozzles are hinged and / or differently shaped. For example, in some nozzles, the nozzle outlet is a cone, spiral, serpentine, or other shape for flowing fluid. In some systems, the nozzle outlet is moveable relative to the nozzle inlet and / or discharge wall, for example by a hinged connection. A hinged outlet can include a recapture (first, hinged, aligned) state in which the nozzle outlet aligns with the turbine to direct fluid to the turbine. The hinged outlet can have an avoidant (second, unhinged, unaligned) state in which the nozzle outlet is not aligned with the turbine and directs a discharged fluid to flow directly into the body of water without interacting with the turbine and / or basin. In some cases, the nozzle has an intermediate (third, partly hinged, partly aligned) state between the recapture state and avoidant state. In the intermediate state, the nozzle can be hinged so that a first portion of the fluid interacts with the turbine and / or basin and a second portion of the fluid flows directly into the body of water without interacting with the turbine and / or basin. The computer sub-system can control the state of the nozzle. For example, the nozzle can be controlled to guide a consistent flow or volume of fluid through the turbine and / or basin so that the turbine generates a consistent power level where the discharge flow may be variable. The nozzle can also be controlled to telescopically collapse or expand to protect the nozzle during transportation or drilling operations. In some nozzles, the size of the nozzle outlet is controlled by the computer sub-system, for example to increase or decrease the diameter of the nozzle outlet.

[0095] While a barge for offshore drilling operations has been described, some barges are include and / or transport maintenance equipment (e.g., maintenance barges). Maintenance barges are similar to the drilling barges, however, maintenance barges do no connect to the wellbore or casing. Maintenance barges include a fluid pump, for example a jockey pump, for intaking seawater at the opening in the floor of the barge.

[0096] A number of embodiments have been described. Nevertheless, it will be understood that various modifications may be made without departing from the spirit and scope of the disclosure. Accordingly, other embodiments are within the scope of the following claims.

Examples

Embodiment Construction

[0027]Offshore barges transport drilling equipment and facilitate offshore hydrocarbon drilling operations in large bodies of water. The disclosed barge includes a primary fluid circuit contained within and mounted to a barge housing. The primary fluid circuit intakes, stores, and discharges fluid used in offshore drill operations. The primary fluid circuit can be a horizontal water (fluid) discharge system which discharges fluid from the housing of the barge, into the body of water. The barge also includes a fluid recapture system (fluid recapture arrangement) that redirects and recaptures at least a portion of the fluid discharged from the barge housing by the primary fluid circuit. The fluid recapture system can decrease the total energy consumption of the barge by rerouting discharged fluid into the primary fluid circuit and by converting hydrostatic energy of discharged fluid into mechanical (rotational) power sufficient to power a fluid pump. In this configuration, the fluid r...

Claims

1. A fluid recapture system comprising:a translation sub-system comprising:a moveable platform;a recirculation sub-system mounted to the moveable platform, the recirculation sub-system comprising:a fluid line having a first end, a second end, and a fluid channel extending from the first end to the second end;a basin attached to the second end of the fluid line and fluidly connect to the fluid channel of the fluid line; anda fluid pump disposed on the fluid line, wherein the fluid pump is operable to convey fluid from the basin to the first end of the fluid line; andan energy conversion sub-system mounted to the moveable platform, the energy conversion sub-system comprising:a turbine aligned with the basin; anda transmission connected to the fluid pump and connected to the turbine, wherein the transmission is operable to power the pump.

2. The fluid recapture system according to claim 1, further comprising a nozzle having an inlet configured to receive a discharged fluid and an outlet configured to expel the discharged fluid, wherein a fluid channel extends between the inlet and outlet.

3. The fluid recapture system according to claim 2, wherein the outlet of the nozzle defines a nozzle axis.

4. The fluid recapture system according to claim 3, wherein the basin and the turbine are arranged on the nozzle axis.

5. The fluid recapture system according to claim 4, wherein the turbine is arranged between the nozzle and the basin.

6. The fluid recapture system according to claim 1, further comprising a shield mounted on the turbine, wherein the shield has a diameter greater than a diameter of the turbine.

7. The fluid recapture system according to claim 1, further comprising a flexible connector, wherein the flexible connector is mounted to the first end of the fluid line.

8. The fluid recapture system according to claim 7, wherein the flexible connector fluidly connects the fluid channel of the fluid line to a primary fluid circuit of a barge.

9. A fluid recapture system comprising:a translation sub-system comprising:a moveable platform; anda motor operable to move the moveable platform in a first direction and a second direction, opposite the first direction;a recirculation sub-system mounted to the moveable platform, the recirculation sub-system comprising:a fluid line having a first end, a second end, and a fluid channel extending from the first end to the second end;a basin attached to the second end of the fluid line and fluidly connect to the fluid channel of the fluid line; andan energy conversion sub-system mounted to the moveable platform, the energy conversion sub-system comprising:a turbine aligned with the basin; anda computer sub-system operable to control the translation sub-system, the recirculation sub-system, and the energy conversion sub-system, wherein the computer sub-system comprising:a controller; andone or more processors, a non-transitory computer-readable medium storing instructions executable by the one or more processors to perform operations, the operations comprising:determining an elevation of the fluid recapture system relative to a surface of a body of water; andprompting the translation sub-system to move in the first or second direction.

10. The fluid recapture system according to claim 9, further comprising a fluid pump disposed on the fluid line, wherein the fluid pump is operable to convey fluid from the basin to the first end of the fluid line.

11. The fluid recapture system according to claim 10, further comprising a transmission connected to the fluid pump and connected to the turbine, wherein the transmission is operable to power the pump.

12. The fluid recapture system according to claim 11, further comprising a nozzle defining a fluid channel and an outlet; wherein the outlet defines a nozzle axis, wherein the basin and the turbine are arranged on the nozzle axis.

13. The fluid recapture system according to claim 11, wherein the operations further comprise:determining a position of the translation sub-system; andprompting the moveable platform to move a predetermined distance in the first or second direction based on at least the position of the translation sub-system.

14. The fluid recapture system according to claim 9, further comprising rails; wherein the moveable platform is mounted on the rails, wherein the platform is moveable relative to the rails.

15. The fluid recapture system according to claim 9, further comprising a generator operable to transfer mechanical energy from the turbine to the pump.

16. A barge comprising:a barge housing comprising:walls comprising a discharge wall defining an exit port;a cover; anda base, wherein the walls extend between the cover and the base to define an interior volume of the barge housing;a primary fluid circuit arranged in the interior volume of the housing, wherein the primary fluid circuit is fluidly connected to the exit port; anda fluid recapture system comprising:an exposed portion arranged outside the interior volume of the housing, the exposed portion comprising:an impeller;a shield mounted on the impeller; anda basin aligned with the impeller; anda housed portion arranged in the interior volume of the housing, the housed portion comprising:a translation sub-system having a moveable platform,a transmission mechanically connected to the impeller by a shaft, anda flexible connection fluidly connecting the basin to the primary fluid circuit.

17. The barge according to claim 16, wherein the flexible connection and the basin are connected by a fluid line, wherein a fluid pump is disposed on the fluid line.

18. The barge according to claim 17, wherein the impeller is operable to power the fluid pump.

19. The barge according to claim 17, wherein the transmission is operable to power the fluid pump.

20. The barge according to claim 19, wherein the impeller is operable to power the transmission.

21. The barge according to claim 17, wherein the impeller comprises multiple blades extending from an impeller hub, wherein the blades are arranged equidistant around the hub.

22. The barge according to claim 16, further comprising a nozzle mounted to an exterior face 208 of the discharge wall, wherein the nozzle is aligned with the exit port.

23. The barge according to claim 16, wherein the discharge wall comprises an impeller recess sized to receive the impeller, wherein the discharge wall defines a shaft opening in the impeller recess sized to receive the shaft.

24. The barge according to claim 16, wherein the discharge wall comprises a collector recess sized to receive the basin.

25. The barge according to claim 24, wherein the collector recess comprises a recess wall and a ledge, wherein the recess wall defines a fluid line opening sized to receive a fluid line connecting the flexible connection with the basin.

26. The barge according to claim 25, wherein the fluid line rests on the ledge.

27. A barge comprising:a barge housing; anda fluid recapture system comprising:a turbine comprising:an impeller comprising:a hub,multiple blades extending from the hub;a shaft having a first end and a second end, wherein the impeller is mounted to second end of the shaft, wherein the shaft and the impeller are rotationally coupled; anda shield mounted to the impeller, wherein the impeller is arranged between the shield and the shaft,a generator connected to the first end of the shaft, wherein the shaft is rotatable relative to the generator; anda fluid pump, wherein the turbine powers the pump through the generator, wherein the fluid recapture system is moveable relative to the barge housing.

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