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| Number | Title | Issue Date |
| 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 keel sleeve includes a pivot mechanism that is lockably received in a r... | 12/23/2008 |
| 7404695 | Seafloor-surface connecting installation of a submarine pipeline installed at great depth The invention concerns a seafloor-surface connecting installation for a submarine pipeline (10) set on the seafloor, in particular at great depth, of the hybrid-tower type comprising a static base (13-18) set on the seabed. In the inventive inst... | 07/29/2008 |
| 7402001 | Seafloor-surface coupling device The present invention relates to a bottom-to-surface connection device comprising at least one undersea pipe or riser (1, 1a-1b) capable of including a single float (2, 21-27), said float being connecte... | 07/22/2008 |
| 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 transport structure for storing the processed hydrocarbons. The vessel... | 05/06/2008 |
| 7314084 | Subsea pumping module system and installation method The present invention contemplates a system comprising a pumping module coupled to an intermediate flow inlet (IFI) wherein said IFI is coupled to a base structure disposed on the flow line that routes production from one or more oil wells, allowing for the quick an... | 01/01/2008 |
| 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 section having a curvature along its length and a wall which is internal w... | 11/13/2007 |
| 7225877 | Subsea intervention fluid transfer system A system for subsea transfer of intervention fluids to a subsea intervention apparatus, the system, in certain aspects, including a structure and a frame pivotably mounted thereto, a plurality of frame fluid conduits on the frame for conducting fluid from a connecto... | 06/05/2007 |
| 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 |
| 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 into a helical configuration against the inside of the confining condui... | 01/16/2007 |
| 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 |
| 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 compensator provides tensioning force for supporting a drill string an... | 11/07/2006 |
| 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 protecting the riser (18) from impacts. The... | 10/03/2006 |
| 7104330 | Marine riser tower This invention relates to a marine riser tower (112, 114) for use in the production of hydrocarbons from offshore wells. The riser tower (112, 114) includes a plurality of fluid conduits, which may comprise production flow lines (P), gas-lift lines (G)... | 09/12/2006 |
| 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 platform and the buoyancy system, while the buoyancy compartments provide bu... | 08/29/2006 |
| 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 |
| 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 |
| 7040841 | Shallow water riser support A conduit structure (44) connects subsea oil wells to a floating structure (12) such as a vessel, in shallow water, the conduit structure providing a low cost and reliable fluid connection during drift of the vessel. The conduit structure includes a se... | 05/09/2006 |
| 7032673 | Orientation system for a subsea well An outer wellhead housing has an external locator member initially oriented in a desired direction. An inner wellhead housing lands in the outer wellhead housing. A BOP orientation spool with an external orientation member and an internal orientation member lands on... | 04/25/2006 |
| 7025533 | Concentrated buoyancy subsea pipeline apparatus and method Various apparatuses and methods to traverse an undersea topographic feature (12) with a subsea pipeline (18) are disclosed. The apparatuses and methods of the present invention accomplish this task through the use of a concentrated buoyancy scheme (... | 04/11/2006 |
| 7021865 | Apparatus and method for use in laying or recovering offshore pipelines or cables During recovery of an offshore pipeline, to a floating vessel for repair, for example, the pipeline is secured to a hang-off clamp. Due to the motion of the vessel, oscillating bending moments can be caused in the pipeline below the clamp. To reduce these bending mo... | 04/04/2006 |
| 6968900 | 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 compensator provides tensioning force for supporting a drill string an... | 11/29/2005 |
| 6869253 | Hybrid riser or pipe for fluid transfer Pipe for great water depths allowing transfer of a fluid between a floating support and a point situated below and at a distance from the water surface, characterized in that it comprises: at least one flexible part connected at on... | 03/22/2005 |
| 6854930 | Underwater pipeline connection joined to a riser The present invention relates to an installation providing a bottom-to-surface connection for an undersea pipe resting on the sea bottom, in particular at great depth, the installation being of the hybrid tower type having a static base placed on the sea bottom. In ... | 02/15/2005 |
| 6805201 | 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 platform and the buoyancy system, while the buoyancy compartments provide bu... | 10/19/2004 |
| 6739804 | SCR top connector A mechanical joint assembly for a steel catenary riser (SCR) is disclosed. The lower section of the mechanical joint assembly is comprised of steel or alternate high strength components, rather than elastomers to absorb the high loads and increase life of the unit. ... | 05/25/2004 |
| 6672804 | Device and method for maintaining and guiding a riser, and method for transferring a riser onto a floating support An apparatus for holding and guiding a floating riser relative to a floating support. The apparatus includes a guidance mechanism secured to the floating support for enabling the riser to rotate about a horizontal axis perpendicular to a longitudinal axis... | 01/06/2004 |
| 6659690 | Tapered stress joint configuration A stress joint for a subsea riser has a reduced diameter intermediate section to reduce bending stresses on the connection between the stress joint and the riser as well as the subsea equipment. The stress joint having a riser joint with a threaded upper ... | 12/09/2003 |
| 6648074 | Gimbaled table riser support system For a spar type floating platform having risers passing vertically through the center well of a spar hull, there is provided apparatus for supporting the risers from a gimbaled table supported above the top of the spar hull. The table flexibly is supporte... | 11/18/2003 |
| 6527053 | Arrangement related to riser pipelines A device in connection with a riser (1) for the transport of oil and/or gas, possibly including water, from a transport system, transport pipe (5) or similar structure on the sea bed to a platform or similar arrangement. To permit the use a riser (1) for ... | 03/04/2003 |
| 6431284 | Gimbaled table riser support system For a spar type floating platform having risers passing vertically through the center well of a spar hull, there is provided apparatus for supporting the risers from a gimbaled table supported above the top of the spar hull. The table flexibly is supporte... | 08/13/2002 |
| 6402431 | Composite buoyancy module with foam core A buoyancy system for a floating platform includes at least one composite buoyancy module coupled to a riser. The composite buoyancy module is sized to have a volume to produce a buoyancy force. The composite buoyancy module may include a vessel with a co... | 06/11/2002 |
| 6364022 | Hybrid riser for deep water Hybrid pipe for deep water, comprising a metallic rigid central part having an upper end of which is connected to an upper portion of flexible pipe of predetermined length and having a lower end of which is connected to a lower portion of flexible pipe of... | 04/02/2002 |
| 6276456 | Riser system for sub-sea wells and method of operation A riser system connecting a oil or gas well head and a surface vessel comprises a first riser section maintained substantially vertically under tension, attached for example by a tension cable to a constant load tensioner means mounted on the vessel, and ... | 08/21/2001 |
| 6263971 | Multiphase production system suited for great water depths The invention is a system used for production of petroleum effluents situated at great water depths. The system includes an intermediate floating station situated below the surface at a depth selected according to the pressure of the effluent at the outle... | 07/24/2001 |
| 5887659 | Riser for use in drilling or completing a subsea well There is disclosed an assembly including a protective sleeve spaced about an intermediate pipe of a riser which is adapted to extend through an opening in the bottom of a vertical compartment of a offshore rig for use in drilling or completing a subsea we... | 03/30/1999 |
| 5778981 | Device for suspending a sub sea oil well riser The invention relates to a guide arrangement 1 for a riser assembly 10 including a length of a second riser tube 6 running from a well head 2 to a surface vessel 6. First buoys 8 are provided which permit the evacuation and refilling of water to adjust th... | 07/14/1998 |
| 5697447 | Flexible risers with stabilizing frame A process comprising: organizing the top of the risers; organizing the bottom of the risers; and twisting the risers to impose tension in the risers. A system comprising: an organizer of the top of the risers; an organizer of the bottom of the risers; and... | 12/16/1997 |
| 5354151 | System for loading at sea System for loading at sea comprising a submersible conveying structure and anchoring device for the conveying structure. The loading system includes a bottom or base structure disposed on a sea bed and a maneuvering arrangement for bringing the conveying ... | 10/11/1994 |
| 5163782 | Subsea connection system and active connector utilized in said system A subsea connection system includes a rigid vertical main connector (23) and an active (mobile) lateral connector (24) coupled to a subsea module (20) for connection, respectively, to a main mandrel (25) and to a lateral mandrel (26) rigidly fixed to the ... | 11/17/1992 |
| 4934871 | Offshore well support system An offshore subsea well includes a wellhead to which is connected an elongated somewhat flexible riser extending to the sea surface. The riser pipe is unstayed and is buoyed at least partially by a buoyancy member connected to the riser between the sea su... | 06/19/1990 |
