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8162063 |
Dual gradient drilling ship
Dual gradient drilling may be performed by anchoring drilling tubulars from a drilling ship on the seabed. The drilling tubulars may include an inline pump for pumping mud through another set of...
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8142108 |
Riser installation method from an offshore production unit
A riser installation method including the steps of providing a first vessel situated over a hydrocarbon well, supporting a hydrocarbon transfer duct from the first vessel by a first end that is...
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8141645 |
Offshore gas recovery
During an Extended Well Test or Early Floating Production at an offshore hydrocarbon production site, where oil and gas hydrocarbons are produced by a production vessel, applicant stores the...
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8136599 |
Marine riser tower
The invention provides a marine riser apparatus (1) for use in the production of hydrocarbons from offshore wells and an associated method of installation of the apparatus at sea. The riser tower...
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8123438 |
Ram style tensioner
A riser tensioner configured to apply a tension to a riser. The riser tensioner includes a frame configured to be fixedly attached to the riser; plural cylinder assemblies spaced around the riser,...
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8083439 |
Riser support system for use with an offshore platform
A riser support system for use in a body of water comprises a buoyant and ballastable support structure and a plurality of substantially vertical and rigid risers each of which is attached to the...
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8083440 |
Riser tensioner restraint device
An apparatus to restrain a riser tensioner of an offshore drilling rig includes a restraint cone configured to fit within hydraulic cylinders of the riser tensioner, a hoist configured to extend...
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8074720 |
Riser lifecycle management system, program product, and related methods
A system, program product, and method for monitoring and managing a plurality of marine riser assets is provided. The system can include one or more floating vessels each carrying a shipboard...
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8047297 |
System for and method of restraining a subsurface exploration and production system
A system for and method of limiting and controlling the unintended subsurface release of an exploration or production riser system is provided including one or more means for anchoring the riser or...
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8016030 |
Apparatus and method for containing oil from a deep water oil well
An apparatus and method for containing oil from a deep water (greater than 1,000 meters) oil well is disclosed herein. The apparatus has an anchor section, a plurality of riser sections, an upper...
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8016520 |
Connector for releasable connection between an anchorage in the form of a female part arranged on a floating means and a male part formed at the end of a retrievable umbilical
A connector (10) for releasable connection between an anchorage in the form of a female part (1) arranged on a floating means and a male part (2) formed at the end of a retrievable umbilical (3)...
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7987903 |
Apparatus and method for containing oil from a deep water oil well
An apparatus and method for containing oil from a deep water (greater than 1,000 meters) oil well is disclosed herein. The apparatus has an anchor section, a plurality of riser sections, an upper...
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7934560 |
Free standing riser system and method of installing same
A free standing riser system includes a riser, a subsea intervention unit, and an umbilical line. The riser includes interconnected joints linked to one another, a lower-end of the riser being...
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7921919 |
Subsea well control system and method
A system comprising a surface installation in position above a plurality of subsea wells disposed within the watch circle of the surface installation. A plurality of flowlines directly couple at...
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7914234 |
Method and apparatus for restraining a tendon top connector in reverse loading conditions
A tendon top connector for a moored, floating structure such as a tension leg platform, a tension leg buoy or the like has a bowl-shaped extension on the member which transfers the tension of the...
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7854570 |
Pontoonless tension leg platform
A pontoonless tension leg platform (TLP) has a plurality of buoyant columns connected by an above-water deck support structure. The design eliminates the need for subsea pontoons extending between...
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7798232 |
Connecting compliant tubular members at subsea locations
A technique facilitates formation of connections between compliant tubular members and subsea facilities. A compliant tubular member is deployed to a subsea location in a manner that arranges the...
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7798233 |
Overpressure protection device
The present invention relates to overpressure protection systems and methods for use on a production system for transferring hydrocarbons from a well on the seafloor to a vessel floating on the...
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7793724 |
Subsea manifold system
An improved subsea manifold system that is capable of being used in an early production system for producing hydrocarbons from a plurality of wells from a common riser system. The subsea manifold...
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7793725 |
Method for preventing overpressure
The present invention relates to overpressure protection systems and methods for use on a production system for transferring hydrocarbons from a well on the seafloor to a vessel floating on the...
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7793726 |
Marine riser system
A marine riser system for transferring fluid between a well on the seafloor and a vessel floating on the surface of the sea. The riser system has a turret buoy capable of connecting to a floating...
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7766580 |
Energy managing keel joint
A keel joint protector, which, in certain aspects, includes a body made of flexible material, a central open bore through the body, and the body having a plurality of spaced-apart energy management...
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7766581 |
System, method, and apparatus for independent retention of a locking device on mooring connections
A tendon or riser connector has a separate lock-down device that overrides the connector's ability to unlock if the riser or tendon goes slack. The connector has a lock ring that engages a groove...
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7744312 |
Offshore pipe string system and method
A pipe string (44) is pulled out by a tug boat (30) from a floating structure (12) such as a production vessel, as pipe sections (54, 56) are connected in series on the vessel, to eventually lay...
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7744314 |
Clamping device for buoyancy bodies
Buoyancy unit for use on a riser for sub sea applications, particularly for great depths, with a clamp 11 to be tensioned around the riser 16, and with a tensioning member 18 to damp the clamp 11....
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7628224 |
Shallow/intermediate water multipurpose floating platform for arctic environments
A method and apparatus for conducting simultaneous drilling and production are provided. The apparatus can include a ship shape floating vessel, wherein the ship shape floating vessel includes at...
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7591316 |
Production system
A known deepwater solution for production risers for extracting oil and gas is the SLOR™ riser. The design of the SLOR™ riser is not compatible with large numbers of risers and thus there is a nee...
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7565877 |
Spar platform having closed centerwell
A spar platform for use in the offshore drilling or production of fossil fuels includes a hull having a centerwell. An airtight and watertight barrier traverses the centerwell, forming a variable...
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7556452 |
Control of flexible riser curvature at the keel of a floating structure
A bend-limiting conduit controls the curvature of a catenary riser extending from the seafloor as it enters the centerwell of a spar-type offshore platform through the keel of the platform. The...
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7540692 |
System, method, and apparatus for locking down tendon or riser moorings
A tendon or riser connector has a separate lock-down device that overrides the connector's ability to unlock if the riser or tendon goes slack. The locking device has blocks that are radially...
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7537416 |
Riser support system for use with an offshore platform
A riser support system for use in a body of water comprises a buoyant and ballastable support structure and a plurality of substantially vertical and rigid risers each of which is attached to the...
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7517173 |
Bearing element
The invention relates to a bearing element, a universal joint and an offshore construction, comprising such a bearing element. The bearing element comprises a rotation axis, a rotation body...
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7503728 |
Stabilized floating support
The support (1) includes a working deck (2) and floatation members (3) supporting this deck (2). According to the invention, the spacing between the vertical axes (Z) passing through the centre of...
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7467914 |
Apparatus and method for supporting a steel catenary riser
An apparatus for supporting a steel catenary riser (SCR) from a floating structure having a keel includes a flexible support tube or keel sleeve through which the SCR passes. The support tube or...
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7413384 |
Floating offshore drilling/producing structure
A deep draft semi submersible structure wherein the semi-submersible has a center of gravity below its center of buoyancy and the structure is a floating vessel with at least three vertically...
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7393158 |
Shrink for centralizer assembly and method
A centralizer system is provided for use in a marine riser system, the centralizer being preferably heat-shrink fitted to an upset portion of a keel joint, the upset portion having tapered sections...
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7373986 |
Riser connector
A riser connector connects the upper portion of a riser (12) having a latching enlargement (32) to a receptacle (14) on a vessel (16), so the riser upper end (22) can connect to a fluid coupling...
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7367750 |
Riser installation vessel and method of using the same
A vessel for exploration of hydrocarbons includes one or more risers extending from the vessel to the seabed, a hydrocarbon processing unit connected to the one or more risers and to a storage or...
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7334967 |
Method and arrangement by a workover riser connection
A slip joint for a riser between a well and a floating petroleum installation, for example an oil platform. The slip joint includes, an outer pipe and an inner pipe, the pipes arranged to enable...
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7318387 |
Water intake riser
A water intake riser that can be suspended from a vessel having a riser connected to a riser hanger, which riser hanger includes a first tubular element, a second tubular element to which the riser...
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7293940 |
Guide tube for a flexible pipe for transporting hydrocarbons
A guide tube for a flexible pipe for transporting hydrocarbons comprising an internal tubular element of a substantially rectilinear section extending along an axis (A) and extended by a free...
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7287936 |
Shallow water riser configuration
A shallow water riser extending between a seabed connection and a floating support connection and of a length through the shallow water to be in wave form with at least one and, as illustrated, two...
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7217067 |
Riser keel joint assembly
A riser joint keel assembly. A tapered riser joint is connected to a larger diameter outer sleeve through a connection that allows the tapered section and outer sleeve to function as one unit. In...
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7189029 |
Multi-catenary type rising column
An undersea pipe of the riser type providing a connection between a floating support and the sea bottom. The riser has a rigid pipe of the catenary type extending from the floating support to a...
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7163062 |
Riser
A riser for conveying fluids from a subsea location to a surface vessel comprises an upper section which is located in a confining conduit, said upper section being allowed to deform elastically...
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7140807 |
Hybrid composite steel tendon for offshore platform
A tendon for an offshore floating platform has a tubular section formed of joints of steel pipe secured together. The tubular section has an interior sealed from sea water to provide buoyancy. A...
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7131496 |
Portable drill string compensator
A closed system drill string compensator having a hydraulic fluid accumulator, at least one air pressure vessel, and a piston and a piston rod slidably engaged within a cylinder. The drill string...
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7121767 |
Rugged foam buoyancy modules and method of manufacture
A buoyancy module comprises a multi-layer outer protective shell that has an exterior surface and an interior surface. A first layer of foam buoyancy material is located adjacent to the interior...
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7114885 |
Protection means for a flexible riser
The invention relates to flexible risers for transfer of hydrocarbons between a sea bed installation and a vessel (10) floating at the sea surface. The riser (18) is provided with means (20) for...
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7104329 |
Marine bottomed tensioned riser and method
A new marine oil production riser system for use in deepwater applications is disclosed. An efficient means for accommodating movements of the host facility, while maintaining riser top tension...
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