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| Number | Title | Issue Date |
| 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 comprises rigid pipelines arranged in a riser tower bundle (... | 03/20/2012 |
| 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 computer, a plurality of riser assets to be tracked and monitored, a riser... | 12/13/2011 |
| 7975769 | Field development with centralised power generation unit The invention relates to a hydrocarbon exploration system, comprising a first vessel (1) having a turret (3) around which the vessel can weathervane, the turret being moored to the sea bed (4), and a second vessel (7) connected with at le... | 07/12/2011 |
| 7520330 | System and method for limiting vortex-induced vibrations on an offshore production riser The present invention relates to a method and to a system for limiting vortex-induced vibrations on a riser suspended at one end from a support and subjected to substantially transverse fluid flows. The system comprises suspension means (10) for hanging the r... | 04/21/2009 |
| 7416025 | Subsea well communications apparatus and method using variable tension large offset risers Disclosed are compliant variable tension risers (106) to connect deep-water subsea wellheads (102) to a single floating platform (104) in wet tree or dry try systems. The variable tension risers (106) allow several subsea wellheads (10... | 08/26/2008 |
| 7328747 | Integrated buoyancy joint A buoyancy system includes a plurality of buoyancy joints distributed along a riser system. Each joint can include a riser pipe, an external frame disposed around a riser and a vessel, and a buoyant cladding disposed between the vessel and the frame. ... | 02/12/2008 |
| 7328741 | System for sensing riser motion A riser monitoring assembly is provided to monitor and manage a riser extending between subsea well equipment and a floating vessel. A riser measurement instrument module is connected adjacent a selected portion of the riser provides dynamic orientation data for the... | 02/12/2008 |
| 7324929 | Method and system for simulating a hydrocarbon-bearing formation The invention is a method for simulating one or more characteristics of a multi-component, hydrocarbon-bearing formation into which a displacement fluid having at least one component is injected to displace formation hydrocarbons. The first step of the method is to ... | 01/29/2008 |
| 7318479 | Assembly for connecting a jumper to a subsea structure An assembly for connecting a jumper to a subsea structure. The assembly comprises a jumper connector attached to an end of the jumper that has a vertically disposed main body adapted for receiving a plurality of lines, which connect into a corresponding plurality of... | 01/15/2008 |
| 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 wave areas in contact with the seabed. A protective sheath optionall... | 10/30/2007 |
| 7240736 | Drilling and producing deep water subsea wells Subsea wells are drilled and completed with an offshore floating platform in a manner that allows simultaneous work on more than one well. A first well is drilled and casing. Then a tubing hanger is run through a drilling riser and landed in the wellhead housing. Th... | 07/10/2007 |
| 7231981 | Inline compensator for a floating drill rig An apparatus and method for protecting against the problems associated with heave of a floating drilling rig are disclosed. The disclosed invention is a unique inline compensator in which a plurality of cylinders housed within a tubular housing and a plurality of lo... | 06/19/2007 |
| 7219740 | Well production and multi-purpose intervention access hub A well production and multi-purpose intervention access hub for flowing fluids from multiple wells to a host facility through a flowline. The hub comprises a production header module and a flowline header module configured for fluid communication with the flowline. ... | 05/22/2007 |
| 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 its bore. The inner tubular member joins to a portion of the conductor ... | 05/15/2007 |
| 7210531 | Protective element for a riser segment A protective element for a riser segment, including an elongated buffer body, at least one foot connected with the buffer body, the at least one foot being provided with an engagement part arranged to engage on a main pipe of a riser segment, the distance between th... | 05/01/2007 |
| 7200540 | System and method for automated platform generation Systems for implementing methods for generating platform location sets comprising selecting a set of platform locations; determining additional platform locations to add to the set of platform locations; validating the additional platform locations, and determining ... | 04/03/2007 |
| 7191836 | Dry tree subsea well communications apparatus and method using variable tension large offset risers Disclosed are compliant variable tension risers (106) to connect deep-water subsea wellheads (102) to a single floating platform (104). The variable tension risers (106) allow several subsea well-heads (102), in water depths from 4... | 03/20/2007 |
| 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 structure. When connected to the cable, the first frame assembly extends lon... | 03/20/2007 |
| 7188677 | Tensioning system for production tubing in a riser at a floating installation for hydrocarbon production A device for tensioning and relieving production tubing (49) extending from a subsea hydrocarbon well (107) up through a riser (63) to a floating installation (87), a continuous production tubing extension (85) passing through a te... | 03/13/2007 |
| 7188574 | Cylindrical hull structural arrangement An improved floating circular hull construction arrangement. The hull is divided into sections by watertight flats. The flats are stiffened with angles or bulb tees curved to form concentric circles that are in turn supported by the radial girders spaced around the ... | 03/13/2007 |
| 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 point of contact with the sea bottom. The catenary riser comprises a low... | 03/13/2007 |
| 7175748 | Subsea production system A subsea well fluid processing system has a separator for separating heavier and lighter components of well fluid flowing from a subsea well and directing the lighter components to flow to a surface processing facility. A choke is located downstream of the separator... | 02/13/2007 |
| 7156039 | Keel guide system A technique for guiding a riser in an offshore environment. The technique utilizes a keel guide that permits the passage of connectors or other components therethrough. A bushing is mounted within the keel guide to guide the relative linear motion of the riser assem... | 01/02/2007 |
| 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 extending from the platform downwardly through a depth of water into the... | 12/19/2006 |
| 7128156 | Wellbore rig with heat transfer loop apparatus A rig, the rig useful in well operations, the rig having rig structure above the earth, and heat transfer loop apparatus connected to the rig for supplying heat transfer fluid for use on the rig, either from a loop or loops with portion(s) in water or portion(s) in ... | 10/31/2006 |
| 7128159 | System and method for limiting vortex-induced vibrations on an offshore production riser The present invention relates to a method and to a system for limiting vortex-induced vibrations on a riser suspended at one end from a support and subjected to substantially transverse fluid flows. The system comprises suspension means (10) for hanging the r... | 10/31/2006 |
| 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 surface. A second layer of foam buoyancy material that includes macrosp... | 10/17/2006 |
| 7100694 | Marine riser tower The invention relates to a marine riser tower having a plurality of rigid metallic conduits bundled together with a metallic tubular core. The conduits may include production lines for hydrocarbons, water injection lines, and/or gas lift lines. A production line or ... | 09/05/2006 |
| 7096958 | Compliant buoyancy can guide A floating offshore platform, of the type having a buoyancy can disposed within a support structure, includes a can guide assembly that has at least two compliant compression pads that are configured and arranged to provide a non-linear load-versus-deflection charac... | 08/29/2006 |
| 7097387 | Engineered material buoyancy system and device There is provided a buoyancy system for a structure having at least one component being substantially stationary with respect to the bottom of a water covered area. The system comprises a set of buoyancy modules of engineered materials to apply an identified amount ... | 08/29/2006 |
| 7080689 | Instrumentation assembly for an offshore riser The present invention relates to an instrumentation assembly intended for an offshore riser (2) operated from a floater (1). It comprises a central processing unit (PC) connected by conducting cables (27) to: a... | 07/25/2006 |
| 7073593 | Method of drilling and operating a subsea well A method of preparing and operating a subsea well (23), comprising the steps of: locating a drill-through subsea tree (24) on a subsea wellhead; sealingly connecting a high pressure drilling riser (22) between the tree and a drilling platform at... | 07/11/2006 |
| 7073978 | Lightweight catenary system A lightweight catenary system for deepsea operations in which a lightweight flexible pipe such as disclosed in U.S. Pat. No. 6,491,779 is suspended in seawater from a vessel or platform, and having a positive or nearly positive buoyancy, and which is stabilized by d... | 07/11/2006 |
| 7070361 | Apparatus and methods for providing VIV suppression to a riser system comprising umbilical elements Apparatus for suppressing vortex induced vibrations on a marine element of a riser system wherein the riser system comprises at least one umbilical element. Systems comprising and methods of using said apparatus to suppress vortex induced vibrations. The apparatus, ... | 07/04/2006 |
| 7066686 | Automatic control methods for positioning the lower end of a filiform structure, notably an oil pipe, at sea Method intended for automatic control of an underwater pipe for connecting the lower end of the pipe to a wellhead, wherein the following stages are carried out: Stage 1: determining a mathematical model expressing the position of ... | 06/27/2006 |
| 7059416 | Buoyancy can for offshore oil and gas riser 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 coa... | 06/13/2006 |
| 7044072 | Cylindrical hull structure An improved floating circular hull construction arrangement. The hull is divided into sections by watertight flats. In each section, longitudinal stiffeners spaced around the inside of the outer shell terminate adjacent the flats and do not penetrate the flats. The ... | 05/16/2006 |
| 7044228 | Flowline jumper for subsea well A subsea well system has a flowline jumper that extends between components on the sea floor. The jumper has connectors on each end for connecting to the two components and has a curved portion. At least a portion of the jumper is buoyant to cause it to assume a vert... | 05/16/2006 |
| 7040406 | Subsea riser disconnect and method A subsea riser disconnect assembly 10 may be actuated from a drilling rig DR by axial movement of an upper riser 35 relative to a lower riser 28, for disconnecting the upper riser 35 from the lower riser 28. A subsea riser valve as... | 05/09/2006 |
| 7037724 | Method for storing and transporting crude oil Disclosed is a method for transporting blended crude oils comprising the steps of; (a) admixing a first crude oil with a second, different crude oil to form a crude oil admixture; (b) determining a first value representing the content of unprecipitated asphaltenes i... | 05/02/2006 |
