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7628207 |
Accumulator for subsea equipment
Pressure-balanced accumulator apparatus for use in subsea operations is disclosed which comprises a housing and an accumulator within the housing at the first end of the housing. The accumulator...
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7621338 |
Non-orienting tree cap
A wellhead assembly includes a tree cap having a production mandrel extending down into a production passage of a Christmas tree to form a seal. The tree has an annulus bore and an annular cavity...
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7614453 |
Stress distributing wellhead connector
In accordance with certain embodiments, the present invention provides a connector for attaching to a multi-toothed profile on a wellhead features a tooth profile that staggers loading preferably...
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7607485 |
Tubing hanger and wellhead housing with mating tubing annulus passages
A subsea wellhead assembly has a tubing annulus path that extends partly through the tubing hanger and partly through the wellhead housing. A tubing hanger tubing annulus passage extends through...
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7604047 |
Universal tubing hanger suspension assembly and well completion system and method of using same
A tubing hanger suspension assembly for an oil and gas well completion system and a method of installing same. The tubing hanger suspension assembly includes a tubing hanger housing which is...
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7578350 |
Gas minimization in riser for well control event
A system for controlling gas in a subsea drilling operation is disclosed in one embodiment. The system includes a subsea blow-out preventer, riser coupled to the blow-out preventer, a gas sensor, a...
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7565931 |
Dual bore well jumper
A dual bore well jumper establishing fluid communication between a subsea well and a subsea flowline. The dual bore well jumper comprises a first pipe comprising a first pipe bore and a second pipe...
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7565932 |
Subsea flowline jumper containing ESP
A subsea production system on a sea floor has a pump flowline jumper with a straight intermediate portion and two end portions. Each end portion has a connector for ROV assisted connection between...
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7516795 |
Subsea petroleum production system method of installation and use of the same
A subsea petroleum production system for artificial lift, including a pumping module coupled to a flow base, the system being installed downstream of a Wet Christmas Tree (WCT) on the seabed. The...
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7490673 |
Universal connection interface for subsea completion systems
A subsea completion system includes a first component which comprises a first connection interface, a second component which comprises a second connection interface, and a third component which...
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7464762 |
System for neutralizing the formation of slugs in a riser
A system inserted between the base of a riser ( 5 ) and a production well flowline for collecting an effluent consisting of at least a gas phase and a liquid phase, includes a capacity ( 1 )...
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7445046 |
Nested velocity string tubing hanger
An outer tubing hanger is secured to an outer string of tubing and landed in a wellhead housing. A Christmas tree is connected to the wellhead housing. While in a first mode, an isolation tube...
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7441594 |
Full bore wellhead load shoulder and support ring
A full bore support system for a hanger or other equipment in a wellhead features a support groove in the wellhead that can be integrally made or on an insert. A support ring can have a variety of...
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7434624 |
Hybrid tension-leg riser
This invention provides a production riser system that enables fluid communication in a deepwater drilling environment through the use of a variable buoyancy device supporting both a hybrid riser...
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7426963 |
Piggable flowline-riser system
This invention relates to a flowline-riser production system for the recovery of hydrocarbons from offshore wells, and a method for pigging the interior surfaces of the riser and flowlines. More...
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7422066 |
System for direct vertical connection between contiguous subsea equipment and method of installation of said connection
A system for the direct vertical connection between contiguous sub sea equipment is described, having one or more hydrocarbon flow and/or control interconnection between same, so as to dispense...
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7407011 |
Tubing annulus plug valve
A tubing hanger lands in a tubular outer wellhead member and supports a string of production tubing. The tubing hanger has a production passage for communicating with the interior of the production...
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7395864 |
Method and apparatus for preventing slug flow in pipelines
Disclosed is a method and system for controlling the formation of liquid or gas slugs along a pipeline. In embodiments, an injection unit injects a liquid surface tension reducing agent, such as a...
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7380607 |
Casing hanger with integral load ring
A subsea wellhead assembly includes a housing with a bore containing at least one conical generally upward facing load shoulder that inclines relative to an axis of the bore. A hanger is lowered...
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7360601 |
Submersible well pump installation procedure
A method of installing an electrical pump assembly in a subsea wellhead member avoids having to run the pump assembly through the wellhead member after removing the wear bushing. The operator first...
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7331396 |
Subsea production systems
A subsea production system is disclosed. The subsea production system may comprise a well head, a tubing spool, a tubing hanger, an annulus, a production tree, and a bypass flow path.
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7325598 |
Vacuum assisted seal engagement for ROV deployed equipment
A method and apparatus for attaching a first component which comprises a depending portion to a second component which comprises a bore that is sized and configured to receive the depending...
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7314085 |
Well operations system
A wellhead has, instead of a conventional Christmas tree, a spool tree ( 34 ) in which a tubing hanger ( 54 ) is landed at a predetermined angular orientation. As the tubing string can be pulled...
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7314088 |
System for retrieving a tubular element from a well
A system is disclosed for retrieving a tubular element extending into a subsea well provided with a wellhead, the tubular element being provided with a hanger suspending the tubular element at the...
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7284615 |
Method and system for installing and maintaining a pipeline while minimizing associated ground disturbance
A pipeline installation and maintenance method and system is disclosed in which a number of interconnectible platform modules are assembled into drilling platforms from which a segmented pipeline...
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7275591 |
Tubing hanger with ball valve in production string
The invention provides a wellhead assembly including a wellhead housing supporting a tubing hanger within its central bore and forming a housing stem port through its outer wall to the central...
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7234524 |
Subsea chemical injection unit for additive injection and monitoring system for oilfield operations
A system monitors and controls the injection of additives into formation fluids recovered through a subsea well. The system includes a chemical injection unit and a controller positioned at a...
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7231983 |
Split locking ring for wellhead components
The present invention is directed to a split locking ring for wellhead components. In one illustrative embodiment, the device comprises a first internally threaded wellhead component, a second...
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7225873 |
Coiled tubing cutter
A cutting module to sever a tubing in a well includes a piston and shear blade. The piston includes at least two moveable telescoping elements, which are adapted to expand the first piston from a...
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7225876 |
Connector assembly
A reciprocable connector assembly for coupling a service line through a path in a wellhead and hangar wall, the assembly comprising: connector for coupling with a corresponding connector disposed...
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7219741 |
Tubing annulus valve
A subsea wellhead assembly has a tubing hanger with a tubing annulus passage and a production passage. A metal-sealing shuttle valve is mounted in the tubing hanger for blocking upward flow through...
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7216714 |
Modular, distributed, ROV retrievable subsea control system, associated deepwater subsea blowout preventer stack configuration, and methods of use
A distributed function control module adapted for use in a modular blowout preventer (BOP) stack for use subsea comprises a housing, adapted to be manipulated by a remotely operated vehicle (ROV)...
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7216699 |
Sub mudline abandonment connector
An inner tubular member of a subsea wellhead assembly carries a locking member that moves between a locked and unlocked positions lands within an outer tubular member having a grooved profile in...
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7201229 |
Tree mounted well flow interface device
A subsea production tree has an external annular profile formed on an upper portion of the tree. A vertical passage extending from a lower end of the tree to an upper end of the tree for...
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7191837 |
Motion compensator
A motion compensator is used on a floating vessel servicing a subsea well. The motion compensator includes a first frame assembly adapted to be connected to a cable extending from a lifting...
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7165620 |
Wellhead completion system having a horizontal control penetrator and method of using same
A well completion system includes a completion device defining a bore therein attached to a wellhead and a tool, disposed within the bore, comprising an operational element and a control receptacle...
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7152681 |
Method and arrangement for treatment of fluid
A method utilizes the energy of water that flows out from a high-pressure reservoir. Water and hydrocarbons are separated in a down-hole separator and are brought separately to the seabed. In a...
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7150324 |
Method and apparatus for riserless drilling
An offshore riserless drilling system drills a subsea borehole from a platform and through a cased borehole. The system comprises a lightweight drill string suspending a bottomhole assembly and...
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7134498 |
Well drilling and completions system
A system for use in down hole operations, the system comprising a wellhead; a BOP ram package connected at one end to the wellhead and having an axial bore extending from the wellhead to the other...
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7121346 |
Intervention spool for subsea use
A wellhead assembly for use on a well with a blowout preventer stack having a bore therethrough that utilizes an intervention spool sealingly secured between a horizontal tree and the blowout...
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7117945 |
Well operations system
A wellhead has, instead of a conventional Christmas tree, a spool tree ( 34 ) in which a tubing hanger ( 54 ) is landed at a predetermined angular orientation As the tubing string can be pulled...
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7111687 |
Recovery of production fluids from an oil or gas well
A method and assembly for recovering fluids from, or injecting fluids into, a well having a christmas tree; the fluids typically flow between first and second flowpaths in a continuous path. The...
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7096957 |
Internal beam buoyancy system for offshore platforms
A buoyancy system to buoy a riser of an offshore oil platform includes buoyancy compartments coupled around an elongated internal beam. The internal beam can withstand loads between the oil...
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7096955 |
Long duration fuel cell system
A subsea fuel cell and system adapted for long duration use. The subsea fuel cell comprises a fuel cell stack and a water discharge system. In alternate embodiments, the subsea fuel cell can...
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7093660 |
Well operations system
A wellhead has, instead of a conventional Christmas tree, a spool tree in which a tubing hanger is landed at a predetermined angular orientation. As the tubing string can be pulled without...
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7073591 |
Casing hanger annulus monitoring system
A subsea wellhead assembly has the capabilities of communicating from a tree assembly mounted on an inner wellhead housing to a casing annulus. A passage in the wellhead assembly extends within the...
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7063160 |
Non-orienting tubing hanger system with a flow cage
In a subsea wellhead assembly, a tubing hanger in communication with the subsea well has a hanger port extending through its side. A diverter surrounds the tubing hanger and diverts well fluid...
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7051804 |
Subsea protective cap
A cap for covering an open upper end of a subsea structure includes a base and a body. The base has a size, after shrinkage, at least slightly larger than the exterior of the open upper end of the...
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7044227 |
Subsea well injection and monitoring system
A subsea wellhead assembly has the capabilities of communicating from the outer surface of an inner wellhead housing to a casing annulus. A connector, adapted to attach to a riser, connects to the...
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7040412 |
Adjustable hanger system and method
An adjustable hanger system and related method connect a hanger to a wellhead, with a hanger supporting a tubular secured at its lower end in the well. The wellhead includes a housing 20 having a...
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