239 results about "Offshore oil and gas" patented technology

A marine oil and gas exploration system used for measuring telluric currents as a natural electromagnetic energy source flowing beneath an ocean and sea floor. The marine exploration system includes a towed fish adapted for being pulled behind a survey ship. The coordinates of the ship and the towed fish can be controlled by a GPS satellite and time data. The fish includes an aerodynamic waterproof housing, somewhat reminiscent of a shape of a fish. Metal sheet electrodes of electric field sensors are mounted on the surface of a tubular nose extending outwardly from the housing. The electric field sensors are in direct contact with the sea water. Typically, the fish is towed approximately 100 feet above the sea floor. The positioning of the fish is maintained by the use of an acoustic “pinger” on the fish. The pinger transmits signals up a towed cable to the survey ship. The fish can also include a cesium magnetometer connected to the electric field sensors. The magnetometer provides for detecting low frequency magnetic components of the electromagnetic fields generated by the telluric currents flowing under the sea floor. A filtering of the magnetic component signals is used to provide a phase and amplitude references for the electric fields. The amplitudes of the electric field at each frequency are ratioed against the amplitudes of similarly filtered components of the magnetometer.

An apparatus for use in offshore oil or gas production in which a plurality of vertical stabilizing columns are supported on a submerged horizontal water entrapment plate is provided to support minimum offshore oil and gas production facilities above a subsea wellhead, or subsea processing facilities, or a submarine pipeline, and whose main function is to provide power or chemicals or to perform other operations such as compression, injection, or separation of water, oil and gas. The apparatus is maintained in the desired location by a plurality of mooring lines anchored to the sea-bed. The respective size and shape of the columns and water entrapment plate are designed to provide sufficient buoyancy to carry the weight of all equipment on the minimum floating platform and mooring lines, umbilical and risers attached to it, and to minimize the platform motion during normal operations.

An apparatus for use in offshore oil or gas production in which a plurality of vertical stabilizing columns are supported on a submerged horizontal water entrapment plate is provided to support minimum offshore oil and gas production facilities above a subsea wellhead, or subsea processing facilities, or a submarine pipeline, and whose main function is to provide power or chemicals or to perform other operations such as compression, injection, or separation of water, oil and gas. The apparatus is maintained in the desired location by a plurality of mooring lines anchored to the sea-bed. The respective size and shape of the columns and water entrapment plate are designed to provide sufficient buoyancy to carry the weight of all equipment on the minimum floating platform and mooring lines, umbilical and risers attached to it, and to minimize the platform motion during normal operations.

The present invention provides a low-temperature cementing slurry system. The slurry system has the characteristics of low density, low temperature early strength and low water loss, and has performances such as thickening time and compressive strength meeting the requirements of deepwater cementing construction site. The low-temperature cementing slurry system comprises the following components by weight: 100 parts of oil well cement, 62-175 parts oil well superfine cement, 7.3-23 parts of nano-silica, 10-32 parts active calcium silicate, 15-50 parts of hollow glass microballoon, 3.6-10 parts of an early strength agent, 3.2-8.6 parts of a fluid loss agent, 0.8-2.0 parts of a dispersing agent and 120-195 parts of water. The low-temperature cementing slurry system has density between 1.30-1.60 g / cm<3>, and is particularly suitable for cementing operations on a deepwater low-temperature surface casing segment. The invention has important significance in reducing the offshore cementing cost, and offshore oil and gas resource exploitation.

The invention relates to a fiber-enhanced aerogel-polymer composite material and a preparation method thereof. Fiber-enhanced aerogel is taken as a reinforcement material, and polymer is taken as a substrate and fills a three-dimensional nanometer hole structure of aerogel to form a composite material having a structure of interlacing polymer with a nanometer three-dimensional network of aerogel. The polymer-based composite material has improved thermal resistance, wear resistance, aging resistance, compression strength, impact resistance, and fracture resistance, and is improved in or endowed with features with the respect to sound, light, electricity, magnetism and heat. The method is simple and easy in technical process and beneficial for industrial massive production, and can promote upgrading of conventional polymer-based composite material industry. The fiber-enhanced aerogel-polymer composite material has high application value in the fields of national defense and military, space and aeronautics, high-speed trains, ships and vessels, automobiles, leisure sports, offshore oil and gas fields, wind power generation, electrician electric power insulation, bulletproof and anti-explosion area, mechanical electric appliances and buildings.

A buoyancy can for supporting an offshore oil and gas riser includes an axial bore through which the riser extends coaxially, and a radio-axial slot extending through a side of the can and into the axial bore. A pair of spaced-apart support features are disposed coaxially on the riser, and the can includes a pair of corresponding sockets in the axial bore thereof. The sockets are adapted to receive and vertically support respective ones of the support features in a complementary, axial engagement. The can is placed in the water and moved laterally relative to a fully assembled, vertically supported riser such that the riser passes through the radio-axial slot of the can and into the axial bore thereof without the need for disassembly of the upper portion of the riser. The relative vertical positions of the can and riser are then adjusted such that the support features engage and seat within respective ones of their complementary sockets.

The invention discloses a chelated iron desulfurizer and application method thereof, and belongs to the technical field of gas purification. The chelated iron desulfurizer comprises the following components: soluble iron salt, an iron salt chelating agent, a sulfide absorbent, a stabilizing agent, a composite particle settling agent, and a multifunctional corrosion inhibitor; wherein the mole ratio of Fe<3+> to Fe<2+> in soluble iron salts is 1:3-5:1; the mole ratio of chelating agent to iron salts is 1.2:1-3:1, and the pH value of the solution is 8.0 to 9.5. The chelated iron desulfurizer is used to remove sulfur under the assistance of a hyper-gravity technology; the desulfurization efficiency is high, the work sulfur capacity is high, the performance of the desulfurizer is stable, and the oxidation regeneration performance is good. The hyper-gravity chelated iron desulfurization technology has the advantages that the technology is simple, the mass transfer efficiency between gas and liquid is high, the equipment is small and can be easily assembled or disassembled, and the technology can be used to remove H2S from natural gas or associated gas in an offshore oil and gas platform.

A semi-submersible, multicolumn, deep draft, floating offshore oil and gas drilling and production platform comprises a floating hull having an adjustably buoyant base, a plurality of columns vertically upstanding from the base, and an equipment deck that is supported atop the columns when the platform is operationally deployed. Each of the columns comprises a cellular structure that includes a plurality of elongated tubes having a variety of cross-sectional shapes extending from the base to the top of the column. Each of the tubes defines one or more closed compartments. At least one of the compartments has a buoyancy that is fixed, and at least another one of the compartments has a buoyancy that is adjustable. The buoyancy of the compartments and the base can be controllably adjusted with pressurized air to provide a safer and less costly method for deploying the platform for offshore operations.

The invention discloses a solid-phase-free multi-functional well completion working solution and belongs to the field of oil field chemical industry. The solid-phase-free multi-functional well completion working solution is prepared from the following raw materials in part by weight: 1 to 60 parts of inorganic salt, 0.2 to 20 parts of bulk-proofing agent, 0.2 to 5 parts of tackifier, 0.2 to 5 parts of fluid loss agent, 0.2 to 2 parts of corrosion and scale inhibitor, and 0.2 to 5 parts of bactericide. The solid-phase-free multi-functional well completion working solution has the effects of controlling and cleaning a well, protecting hydrocarbon reservoir and preventing a sleeve from being corroded, and meets the multi-functional requirement of offshore oil and gas field operation on the well completion working solution.

A buoyancy can for supporting an offshore oil and gas riser includes an axial bore through which the riser extends coaxially, and a radio-axial slot extending through a side of the can and into the axial bore. A pair of spaced-apart support features are disposed coaxially on the riser, and the can includes a pair of corresponding sockets in the axial bore thereof. The sockets are adapted to receive and vertically support respective ones of the support features in a complementary, axial engagement. The can is placed in the water and moved laterally relative to a fully assembled, vertically supported riser such that the riser passes through the radio-axial slot of the can and into the axial bore thereof without the need for disassembly of the upper portion of the riser. The relative vertical positions of the can and riser are then adjusted such that the support features engage and seat within respective ones of their complementary sockets.

The invention discloses an exploitation device of gas hydrate of a shallow water region and belongs to the technical field of marine energy exploitation. The exploitation device of the gas hydrate of the shallow water region comprises a casing pipe (1) and a sleeve (2) which is connected at the lower end of the casing pipe (1), the casing pipe (1) and the sleeve (2) are communicated, heating wires (3) are arranged inside the sleeve (2), and a cable (5) which supplies power to the heating wires (3) is arranged inside the casing pipe (1) and the sleeve (2). The exploitation device of the gas hydrate of the shallow water region can facilitate the exploitation of the gas hydrate of the shallow water region, and is relatively small in exploitation difficulty, simple in structure, low in cost of investment, easy and convenient to operate, and widely applicable to offshore oil and gas fields. The invention further discloses a method for exploiting the gas hydrate of the shallow water region by utilizing the exploitation device of the gas hydrate of the shallow water region.

A composition comprising by weight:[0001]70 to 96% of at least one polyamide chosen from PA-11, PA-12, aliphatic polyamides resulting from the condensation of an aliphatic diamine having from 6 to 12 carbon atoms and an aliphatic diacid having from 9 to 12 carbon atoms, and 11 / 12 copolyamides having either more than 90% of nylon-11 units or more than 90% of nylon-12 units;[0002]4 to 10% of a plasticizer;[0003]0 to 25% of an NBR or H-NBR elastomer; and[0004]the sum of the amount of plasticizer and the amount of elastomer is between 4 and 30%;can be manufactured by melt-blending the various constituents using standard techniques for thermoplastics. The composition is particularly useful for pipes used in the operation of offshore oil and gas fields. They exhibit very good ageing resistance. They are also useful for simpler pipes in motor vehicles, these compositions withstanding the ageing caused by the temperature under the bonnet of motor vehicles and the nature of the fluids transported. Pipes which comprise at least one layer of this composition are useful for offshore uses and for simpler pipes used in motor vehicles.

The invention discloses an offshore oil and gas transportation flexible vertical pipeline. The pipeline comprises a cable, a flexible pipe for oil and gas transportation, an anchor chain for determining the spatial path of the pipeline, and a buoyancy component, wherein the cable is connected with the anchor chain through a connecting component and is provided with a constraint component which sleeves the flexible pipe to prevent the flexible pipe from being drifted; and the anchor chain supported by the buoyancy component is provided with a vertical gravity catenary segment and a transverse wave line segment to determine the spatial path of the vertical pipeline. The flexible vertical pipe is used for realizing the oil and gas transportation, and the cable and the gravity anchor chain can effectively constrain the flexible pipe, so that reliable oil and gas transportation is realized, the flexible pipe is prevented from being subjected to large-displacement drifting in seawater and is well protected, and the pipeline is firm, reliable, safe, and convenient and easy to construct at a high speed, and has low cost.

A method has been provided for gathering, transporting, and marketing hydrocarbons from offshore fields. The method can include gathering different quality oils and then storing and / or segregating the oils according to such qualities. The oils can then be marketed, according to the qualities, to one or more locations via a floating vessel. In some configurations, the method can further include a gathering of gas and then processing of at least a portion of the gathered gas on the vessel. Gas processing techniques can include, among others, a compression of the gas, a generation of electricity, an internal utilization on the vessel, and a gas-to-liquids processing. The product of some of the processing techniques can, in turn, be marketed to one or more locations.

The invention relates to the oil field production technology field and especially relates to an offshore oil and gas well test pipe column and ground flow decision system. The system comprises a data layer, an application service layer and a knowledge base layer. The data layer is quoted from external data, various kinds of databases are established and a support is provided for output of the application service layer. The application service layer comprises a pre-decision of a test pipe column and a ground flow, flow simulation of the test pipe column and the ground flow, flow guarantee of the test pipe column and the ground flow and real-time analysis. The knowledge base layer carries out automatic correction on a correlation parameter in a simulation model and guides the flow simulation of the test pipe column and the ground flow and a flow guarantee analysis. The decision system can realize an individual decision of the test pipe column and the ground flow and can realize highly decision fusion and an integration decision of the test pipe column and the ground flow so that a test pipe column and ground flow design is scientific and reasonable and safety guarantee is provided for test work.

The invention discloses a construction program of a semi-submersible platform for offshore oil and gas development, and comprises the following steps: preparing parts, making an upgrade support, and folding a pontoon and a column into a lower part structure; a plurality of elevating brackets are arranged on the exterior of two sides in the longitudinal direction of a main deck, a plurality of elevating brackets are arranged on the hollow position of two sides in the longitudinal direction of the main deck, a lower elevating lifting point is arranged on a position which corresponds to strong structure of the close lower part of the main deck under the elevating brackets of the interior and the exterior, a elevating beam on the top part of the elevating bracket is provided with pressure synchronous elevating equipment which is connected with lower elevating lifting point on the main deck so as to carry out the overall hydraulic synchronizing elevating and lifting on the main deck, the lower part structure of the main deck is moved under thereof to be in place, and the pressure synchronous lifting equipment slowly lowers to enable the main deck to be located on the lower part structure and to be welded and provided with a tube support structure. The invention has simple operation, time saving and energy saving and improved working efficiency.

A floating platform for recovery of oil and gas from offshore oil and gas fields supports one or more decks above the water surface to accommodate equipment for drilling and processing oil, gas and water recovered from the oil and gas field. The platform includes a central column having a portion substantially below the water surface, and including a portion which extends above the water surface. The central column includes a base node and a plurality of pontoons extending outwardly therefrom and is anchored to the seabed by one or more tendons secured to the pontoons and to the seabed. Ballast modules fixedly or removably secured to the base node and / or the pontoons accept solid or liquid ballast for lowering the vertical center of gravity of the platform.

The invention relates to a remote control device and a method of an offshore oil and gas well safety valve, belonging to the field of safety valve remote control. The remote control device of the offshore oil and gas well safety valve comprises a master control center upper computer, GPRS (General Packet Radio Service) modules, antennae, a safety valve single chip control device and electromagnetic relays, wherein the land master control center upper computer is sequentially connected with a first GRPS module, a first antenna, a second GPRS module, a second antenna, the safety valve single chip control device, a first electromagnetic relay, a second electromagnetic relay and a third electromagnetic relay; the three electromagnetic relays are in parallel connections; and the first electromagnetic relay is connected with a subsurface safety valve, the second electromagnetic relay is connected with a wellhead safety valve, and the third electromagnetic relay is connected with a well casing safety valve. The invention improves the safety and the automation level of the production of the offshore oil and gas well platform, and has the advantages of powerful function, simple installation, convenient use, safety and reliability.

Methods for developing an offshore field comprising deploying a lead drilling and production vessel to a offshore field to drill and complete at least one well. Production from the at least one well is initiated and evaluated. A secondary production vessel is selected based upon the evaluated production and is deployed to the offshore field to replace the lead drilling and production vessel and support production of the at least one well.

Method and structures perform decommissioning of offshore oil and gas platforms with associated wells. By installing on a platform (1) a movable decommissioning rig tower (2) but stripping away most of the other structures and equipment on the platform (1), and specifically not providing supporting resources such as drilling mud and power, accommodation, etc. on the platform, it is possible for both the rig tower (2) and a further rig tower (28) installed on a jack up rig (20) located alongside the platform (1) to access the well bay (5) of the platform. Thereby, two wells may be accessed simultaneously through the same well bay (5) and respective decommissioning operations carried out simultaneously and independently.

A floating platform for recovery of oil and gas from offshore oil and gas fields includes a hull having a portion located substantially below the water surface, and including a portion thereof which extends above the water surface. The platform is anchored to the seabed by one or more tendons secured to the base of the hull and the seabed. The playload capacity of the floating platform is increased without redesigning the structural design of the hull by attaching a column extension or mounting a detachable buoyancy module to the lower end of the hull for accomodating changing platform pay load requirements.

A personnel transfer device, of the type commonly used in offshore oil and gas operations, has a means for lowering personnel from the personnel transfer device in a controlled manner, with the personnel transfer device in an elevated position. In one embodiment, the personnel transfer device has an automatic descender device fixed thereto. Such personnel transfer devices are typically lifted by cranes mounted on offshore platforms or drilling rigs, and move personnel from elevated positions on the platform or drilling rig to and from the decks of boats. In the event of a crane failure during the personnel transfer procedure, resulting in the personnel transfer device suspended in the air in an elevated position, personnel that are in the personnel transfer device can use the automatic descender to safely lower themselves from the elevated personnel transfer device to a waiting boat, the water's surface, etc.

The invention relates to a column stabilized offshore nuclear power platform. The bottom of the nuclear power platform is provided with an ring-shaped floating box, the bottom of the ring-shaped floating box is fixed to the seabed of a shoal water area through a suction pile foundation, and a cross-shaped horizontal transversal support is disposed in a hollow position of the ring-shaped floating box; four corners of the floating box are respectively provided with columns, the outside face of each column is provided with a suspension chain type or tensioning anchoring system used for locating in a deepwater area; the upper portion of the ring-shaped floating box is connected with the bottom of the platform deck, and axes of columns and the axis of the suction pile foundation coincide; and a cylindrical nuclear island cabin is disposed between the middle portion of the horizontal transversal support in the ring-shaped floating box and the platform deck, the upper end of the nuclear island cabin penetrates through the platform deck, the platform deck is provided with a nuclear island hatch cover and an anticollision protection structure, and the sea level is higher than an immersion height needed by the nuclear island cabin after the nuclear power platform is arranged in place. The column stabilized offshore nuclear power platform is good in security, simple in structure, easy to mount and arrange in place, and low in engineering cost, and the column stabilized offshore nuclear power platform can provide stable, reliable and clean energy for exploitation of offshore oil and gas fields in shoal water areas and deepwater areas, islands and seaside users.

The invention belongs to the design technology of marine oil and gas equipment, and in particular relates to a fatigue design method of a deepwater riser. This method considers the coupling effect of vortex-induced motion of the floating platform and vortex-induced vibration of the riser when calculating the fatigue damage of the deep-water riser. The influence of fatigue damage caused by vortex-induced motion of the floating platform on the fatigue damage of the riser caused by the current is considered, and the influence of the fatigue damage caused by the extreme wave load on the fatigue damage of the riser is considered. The present invention is more in line with the actual fatigue damage accumulation essence of the deep water riser, more in line with the known Miner's linear damage accumulation criterion, more in line with the current environmental load change trend and characteristics, more scientific and reasonable, and the design result is safer and more reliable.

Methods for developing an offshore field comprising deploying a lead drilling and production vessel to a offshore field to drill and complete at least one well. Production from the at least one well is initiated and evaluated. A secondary production vessel is selected based upon the evaluated production and is deployed to the offshore field to replace the lead drilling and production vessel and support production of the at least one well.

The invention relates to an offshore nuclear power platform for shallow ice sea regions. The offshore nuclear power platform is provided with more than three suction pile foundations, wherein one end of each suction pile foundation is connected with a seabed; the other end of each suction pile foundation is connected with the bottom of a cylindrical buoyancy tank, and each suction pile foundation can be separated from the cylindrical buoyancy tank; the top periphery of the cylindrical buoyancy tank is connected with the bottom of a platform deck through more than three stand columns; a cylindrical nuclear island chamber is arranged between the middle of the top of the cylindrical buoyancy tank and the platform deck; the upper end of the cylindrical nuclear island chamber is communicated with the platform deck, and a nuclear island chamber cap and an anti-collision protection structure are arranged on the platform deck; after the nuclear power platform is positioned, the sea level needs to be higher than the height of sea submerging the nuclear island chamber. The offshore nuclear power platform disclosed by the invention is high in safety and simple in structure; the platform construction has no special requirements; for transit, dry transport of barges can be adopted, and wet transport in the state that the platform floats can also be adopted; the mounting and positioning procedures are simple, and the construction cost is low; the offshore nuclear power platform can provide stable, reliable and clean energy sources for the development of offshore oil and gas fields in the shallow ice sea regions, and users on islands and seashores.

An extendable draft offshore oil and gas drilling and production platform (“EDP”) includes a buoyant deck having a central opening, an adjustably buoyant pontoon, and a single, adjustably buoyant column. The column is mounted upright on the pontoon, and is vertically movable through the central opening of the deck. The deck is supported on an upper end of the column above a body of water for offshore operations. The pontoon, and optionally, the column, have compartments with a buoyancy that is adjustable by pumps or sea water ballast and pressurized air. In one embodiment, the compartments can comprise a plurality of tubes. In another embodiment, a lower end of the column may comprise an open truss structure. The platform combines the advantages of a SPAR platform with those of a deep draft extendable draft platform.

A floating platform for recovery of oil and gas from offshore oil and gas fields supports one or more decks above the water surface to accommodate equipment for drilling and processing oil, gas and water recovered from the oil and gas field. The platform includes a central column having a portion substantially below the water surface, and including a portion which extends above the water surface. The central column includes a base node and a plurality of pontoons extending outwardly therefrom and is anchored to the seabed by one or more tendons secured to the pontoons and to the seabed. Ballast modules fixedly or removably secured to the base node and / or the pontoons accept solid or liquid ballast for lowering the vertical center of gravity of the platform.

A riser system for offshore oil and gas production for communicating systems located on the seabed with floating facilities suitable for accommodating floating facility static and dynamic offsets and motions. The riser system comprises a riser extending from the seabed to a floating facility that is supported by a hybrid support system.

The invention relates to an underwater wellhead descending tool used for offshore oil and gas production. The underwater wellhead descending tool comprises a spindle, an upper support block, a lower support block, a driving block, a locking ring and a protective cover. The upper support block and the lower support block are connected and sleeved on the spindle by bolts, the spindle is connected with the driving block in a threaded manner, axial through holes with guide effects are formed in the driving block, the corresponding bolts penetrate the axial through holes of the driving block, the opening elastic locking ring is mounted between the driving block and the lower support block, and the protective cover is positioned on the top of the underwater wellhead descending tool and is connected onto the upper support block by bolts. The underwater wellhead descending tool has the advantages that a wellhead can be effectively descended and recycled by the aid of the underwater wellhead descending tool, the underwater wellhead descending tool is simple in structure, working procedures are simple and convenient, the wellhead can be quickly mounted and recycled, and the work efficiency can be improved.