233 results about "Moon pool" patented technology

An offshore floating production, storage, and off-loading vessel has a monolithic non ship-shaped hull of polygonal configuration surrounding a central double tapered conical moon pool and contains water ballast and oil storage compartments. The exterior side walls of the hull have flat surfaces and sharp corners to cut ice sheets, resist and break ice, and move ice pressure ridges away from the structure. An adjustable water ballast system induces heave, roll, pitch and surge motions of the vessel to dynamically position and maneuver the vessel to accomplish ice cutting, breaking and moving operations. The moon pool shape and other devices on the vessel provide added virtual mass capable of increasing the natural period of the roll and heave modes, reducing dynamic amplification and resonance due to waves and vessel motion, and facilitate maneuvering the vessel. The vessel may be moored by a disconnectable turret buoy received in a support frame at the bottom of the moon pool and to which flexible well risers and mooring lines are connected.

Column-stabilized floating offshore platform structures (10) having spaced apart buoyant main vertical columns (11) joined at lower ends by horizontal lower truss members (13) in a pin connection and joined at upper ends by a buoyant deck mount structure (14), and/or by horizontal truss members, to form a moment connection. A buoyant keel tank (15) having a central moon pool (15A) can be retracted and extended relative to the main columns between a retracted transport mode and an extended operating mode. Ballast of the columns and keel tank can be adjusted to raise or lower the center of gravity of the structure with respect to its center of buoyancy to stabilize the structure and compensate for variable or fixed loads, deck payloads, environmental conditions, and operational and installation stages. A three-sided deck mount allows on-site float-over deck installation.

Applicants have created a method and system of deep sea mining comprising mining SMS deposits from the sea floor with a subsea miner, pumping the solids from the subsea miner through a jumper and pumping the solids from the jumper up a riser to a surface vessel. Further, applicants have created a method of deploying a deep sea mining system, comprising stacking a riser hangoff structure on top of a subsea pump module forming an assembly; picking up the assembly by a hanging mechanism, hanging the assembly on a moon pool, attaching a first riser joint; disconnecting the riser hangoff structure from the assembly; and attaching at least one second riser joint to form the riser.

A spool for deploying and retrieving multiple separate strings of continuous tubing, such as over the side of or through the moon pool of a boat, rig or other vessel, without the need of an injector head. The spool has at least one rotating swivel to permit pumping of fluid(s) down, or back up, tubing strings while the spool is rotating or stationary. A level-wind assembly having at least one sheave directs the continuous tubing overboard, but also level-winds the tubing onto the spool in an orderly fashion through lateral movement of the sheave. The system is powered by a hydraulic power unit with a remote control console.

The invention discloses a semi-submersible type production platform of reservoir oil positioned below a water surface. The semi-submersible type production platform comprises an annular buoyancy tank, a box-shaped deck and at least three upright posts, wherein the annular buoyancy tank is internally provided with a water ballast tank, an oil storage compartment and a pump compartment; the box-shaped deck is provided with an oil-gas processing system, well drilling equipment, a positioning mooring system and a moon pool and internally provided with a production function compartment and a well drilling equipment compartment; and the annular buoyancy tank is connected with the box-shaped deck through the upright posts. The semi-submersible type production platform has an oil-gas production function, a storage and transportation function and a well drilling function, can be removed and reused, is flexible and suitable for the early pilot production and a deepwater oil field and bore well development, can be used effectively lowering the economic risk of the development of a deepwater oil and gas field, has more excellent motion performance compared with a ship form and a circular platform by adopting a semi-submersible type platform structure form and can meet the requirement for simultaneous performance of platform well drilling and production operation under the conditions of harsh marine environments, i.e. the South China Sea and the like.

The invention provides a novel floating type multifunctional seaborne test platform. The novel floating type multifunctional seaborne test platform comprises a floating type platform and a matched sea mooring system, wherein the floating type platform comprises a floating body structure, a stand column, a freeboard deck, a lower deck and an upper deck, a rectangular moon pool is formed in the middle of the test platform, a derrick and an electric hoist arranged on the derrick are arranged above the moon pool, the sea mooring system comprises a navy one-side anchor machine and an anchor chain, the upper deck is provided with a deck house, a starboard of the upper deck is provided with a hydraulic slewing crane, the test platform is further provided with a flow rate and flow direction meter, a master control chamber is also formed in the deck house, and a data acquisition device, 3G wireless transmission equipment, a ballast tank control face plate and a computer are arranged in the master control chamber. The novel floating type multifunctional seaborne test platform can provide the test platform located in a natural sea area for various marine scientific experiments, can provide valuable on-site experimental data for development of various fields of oceanographic engineering, and has great promotion and popularization effects on the oceanographic engineering.

A vessel for operating on underwater wells has a deck; a moon pool extending through the deck; a further deck elevated above the moon pool and having a hole; and a compensation unit, which is mounted on the deck above the moon pool, is arranged between the deck and the further deck, and is provided with a frame sliding along the deck, a support carrier moveable with respect to the frame in a direction substantially vertical and suitable to support items, and a driving assembly connecting the support carrier to the frame and suitable to be selectively set so as to displace in the direction the support carrier either in a heave compensation mode or in a elevator mode.

The invention discloses an annular lower floating body semi-submersible platform. The annular lower floating body semi-submersible platform is provided with a lower floating body (1) and an upper ship body (2) which are connected through stand columns (3), wherein the lower floating body (1) is a regular hexagonal annular column body; the stand columns (3) are pentagonal column bodies and are uniformly distributed on the six corners of the lower floating body (1); the upper ship body (2) is a hexagonal frustum with a flare; and a moon pool (9) is arranged in the center of a box-type deck (8) of the upper ship body (2). The annular lower floating body semi-submersible platform is excellent in motion performance, has the characteristic of unconditional stability, is wide in application range of operation water depth, good in overall structure strength, light in weight, low in manufacturing cost and low in operation energy consumption, and can be applied to deepwater oil and gas exploitation under harsh marine environment conditions.

A semi-submersible floating platform for offshore drilling and/or production of petroleum product from the seabed includes a base having a first moon pool; a plurality of vertical outer buoyancy columns extending upwardly from the base; a deck structure supported by the buoyancy columns and having a second moon pool; a central columnar buoyancy apparatus having a lower portion guided within the first moon pool and an upper portion guided within the second moon pool; and at least one vertical riser passing through the buoyancy apparatus. Each riser has a lower portion that is horizontally restrained within the buoyancy apparatus below the center of gravity thereof. In a preferred embodiment, the platform includes at least two vertical risers attached to a single buoyancy apparatus.

A turret mooring system for a vessel which includes a moon pool comprises a turret which is positioned in the moon pool, a buoy and anchor chain assembly for anchoring the turret to the sea floor, a bearing assembly for rotatably connecting the turret to the vessel, and a bearing support assembly which comprises an upper ring member to which the bearing assembly is connected, a lower ring member which is connected to the vessel in the moon pool, and a number of elongated support beams which are connected between the upper and lower ring members. In addition, the lower ring member is connected to the vessel near the vertical center of the vessel in order to minimize the deflections of the bearing assembly due to hogging and sagging of the vessel.

The invention discloses a floating type self-elevating drilling platform which is provided with a main deck, an upper structure of the main deck, a floating pad, pile legs, an elevating mechanism and a mooring system. The area and the thickness of the floating pad are larger than those of the main deck, the center of the floating pad is provided with a moon pool, and the floating pad is internally divided into a plurality of bins. A well drilling module is located on or is close to the upper portion of the geometrical center of the main deck, the number of the pile legs is three, the three pile legs are of a truss structure, the bottom of each pile leg is in rigid connection with the floating pad, and the main deck vertically lifts along the pile legs through the elevating mechanism and is fixed at the predetermined height. Each pile leg comprises an upper section hollow sealing body and a lower section hollow sealing body, and during the operation, the waterline is located within the height range of the upper section and is positioned through the mooring system. Different from a traditional self-elevating platform, the floating type self-elevating drilling platform is not in contact with a seabed during the operation, the floatation center is higher than the gravity, the movement performance is good, the oil storage capacity is high, and the floating type self-elevating drilling platform can be used for oil gas drilling and production in a sea area within a 500-meter water depth and is particularly suitable for a water depth of 200-500 m.

The invention relates to a double moon pool floating production drilling oil storage ship. The double moon pool floating production drilling oil storage ship is characterized by comprising a ship body main deck region, and a process module, a production moon pool, a drilling moon pool, a drilling support module, a power module and a living region which are sequentially arranged from a stern to a bow, and a power positioning system and a stern oil transportation and discharging device; the process module comprises an oil, gas and water separator; one of a dry production tree and a wet production tree is arranged in the production moon pool region; the drilling moon pool is arranged in the middle of the ship body; a drilling channel with a large opening on the upper part and a small openingon the lower part is formed on the ship body at the drilling moon pool; the drilling support module comprises a well port module, a solid control module, and a slurry module; the living region comprises an accommodation region, a changing room, an equipment room, a workshop, and a central control room, and is provided with an air-conditioning system and a helicopter deck; the power positioning system comprises a position measurement system arranged in the living region, a power positioning control system and an execution mechanism which are arranged in the living region and the bow and the stern; and the stern oil transportation and discharging device is arranged on the stern of the ship body.

Applicants have created a method and system of deep sea mining comprising mining SMS deposits from the sea floor with a subsea miner, pumping the solids from the subsea miner through a jumper and pumping the solids from the jumper up a riser to a surface vessel. Further, applicants have created a method of deploying a deep sea mining system, comprising stacking a riser hangoff structure on top of a subsea pump module forming an assembly; picking up the assembly by a hanging mechanism, hanging the assembly on a moon pool, attaching a first riser joint; disconnecting the riser hangoff structure from the assembly; and attaching at least one second riser joint to form the riser.

The invention relates to an automatic control system for a winch and a control method of the automatic control system. The automatic control system for the winch is characterized by comprising a drilling moon pool arranged on a ship body, a plurality of winches and pulleys are arranged circumferentially on the drilling moon pool, and one end of each of steel cables on the winches is suspended on a drilling deck in the drilling moon pool and the other end of each of the steel cables bypasses the corresponding pulley to be connected with a counterweight suspended outboard, and a production stand pipe and a drilling marine riser which are inserted into the bottom of the sea are arranged at the bottom of the drilling deck; and the ship body and the counterweight are both provided with data acquisition modules, output ends of the data acquisition modules are connected with a winch control module arranged in a ship body control cabin, an output end of the winch control module is connected with a winch execution module, and an output end of the winch execution module is connected with a motor of the winch. The automatic control system for the winch has a simple and smart structural design, can shorten motion compensation stroke, is high in automation degree and accurate in calculation, and can be widely used for a drilling process.

Provided is a device for reducing liquid oscillation in a moon pool of an oceanographic engineering structure. Being fixed on the inner wall of the moon pool, a stream guidance cover comprises an outer housing, an inner housing, a plurality of vertical ribs and a plurality of arc-shaped transverse rib plates that are fixedly and integrally connected with the inner wall of the moon pool. The outer housing and the inner housing are both in trumpet shapes. The inner housing is installed between the outer housing and the inner wall of the moon pool. The vertical ribs are radially and uniformly distributed among the outer housing, the inner housing and the inner wall of the moon pool. The plurality of arc-shaped transverse rib plates are fixed at intervals among the outer housing, the inner housing and the inner wall of the moon poll layer by layer. The outer housing and the inner housing are both provided with multiple rows of round holes from top to bottom. The device for reducing the liquid oscillation in the moon pool of the oceanographic engineering structure is simple in structure. The stream guidance cover or multiple layers of wave attenuating rings or multiple rows of arc-shaped wave attenuating plates can effectively prevent the waves climbing, thereby preventing the occurrence of overtopping on the deck, reducing the formation of vortex inside the moon pool, and improving the hydrodynamic property of watercraft. The coupling effect between the sea water and the structure is weakened; and the oscillation of the oceanographic engineering structure is relieved.

The invention discloses water surface support launching and retrieval system for deep sea mining engineering. The water surface support launching and retrieval system for deep sea mining engineering comprises a moon pool valve device, a cable launching and retrieval device, a mining car launching and retrieval device, a pipeline automatic docking and disassembly device, a pipeline storage and transport and auxiliary connection device, a tower frame and lifting device, a hose launching and retrieval device, and a auxiliary operating device. Each device is arranged on the periphery of the moon pool and a deck of a ship tail. The water surface support launching and retrieval system for deep sea mining engineering is used to safely launch all the equipment and auxiliary facilities of the underwater mining system in the specified sea condition to the required operating points under the water, and all the equipment and facilities can be safely retrieved to a surface mother ship in the specified sea condition. Operation cooperative control can be carried out by a central control room in the launching and retrieval system, the operation can also be carried out near a device machine. The water surface support launching and retrieval system for deep sea mining engineering is reasonable in space arrangement, and closely connected in work process. The operation of the launching and retrieval is completed safely and reliably, and the efficiency of the launching and retrieval is improved effectively.

The present invention relates to a moon pool and to a drillship comprising same. The moon pool is formed in the drillship, and comprises a first space penetrating through an upper deck from the bottom surface of the drillship to enable drilling, and a second space which is formed at the side portion of the first space in the lengthwise direction of the drillship, and which has a bottom surface opened toward the lower side of the drillship. As the second space of the moon pool is formed at the side portion of the first space of the moon pool in the lengthwise direction of the drillship, the moon pool has an elongate effective length, to thereby vary the vertical movement of the seawater in the moon pool and reduce resistance of the drillship during sailing. Further, a separation wall is arranged such that a top surface thereof is located at a predetermined height between the first space and the second space, to reduce the amplitude of sloshing movement of the seawater in the moon pool, and reduce resistance caused by the sloshing movement. Further, the opening opened toward the lower side of the first space keeps the transverse width thereof at a constant level in the direction of the stern of the drillship, and then is gradually tapered, thereby relatively reducing the amount of seawater flowing into the first space and reducing resistance of the drillship.