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| Number | Title | Issue Date |
| 7325628 | Anchor for vehicle, vehicle and anchor in combination, and method of using the anchor A seabed anchor (20) is fixed to and deployable from an ROV (10) for positively anchoring the ROV (10) to the seabed (100). The seabed anchor (20) comprises three nested telescoping tubes (26, 28, & 30). The upper end... | 02/05/2008 |
| 7314087 | Heave compensation system for hydraulic workover The present invention relates generally to offshore drilling and production operations, and, more particularly, to marine drilling workover/intervention tensioning and compensating devices and methodologies. A heave compensated hydraulic workover device and/or syste... | 01/01/2008 |
| 7308943 | 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 disturbing the tree, many advantages follow, including access to the producti... | 12/18/2007 |
| 7299760 | Floating LNG import terminal and method for docking A floating terminal for offloading an LNG carrier vessel in the sea. The floating terminal of open frame construction is moored toward its front end with a rotatable mooring arrangement so that the terminal may weathervane in response to environmental forces. Marine... | 11/27/2007 |
| 7281585 | Offshore coiled tubing heave compensation control system An offshore oil well assembly is provided that includes a floating vessel and a coiled tubing injector supported on the floating vessel. A coiled tubing string is movable by the injector into and out of a wellbore. The assembly also includes at least one measurement... | 10/16/2007 |
| 7255180 | Modular drill system requiring limited field assembly and limited equipment support A modular transfigurable drilling rig comprises one or more transfigurable containers with drilling equipment to form an operational drilling rig. The transfigurable containers include a first and second load bearing support and a load bearing bottom disposed betwee... | 08/14/2007 |
| 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 |
| 7191839 | Drilling rig apparatus and downhole tool assembly system and method A drilling rig is provided which is adapted to selectively drill using coiled tubing and jointed-pipe. The rig includes a base, a mast, a top drive slidably mounted to said mast for performing jointed-pipe operations, and a tubing injector for performing coiled tubi... | 03/20/2007 |
| 7117810 | Platform structure The invention relates to a floating platform (1) for offshore drilling or production of hydrocarbons, comprising a topsides (2) and a substructure (3) having a lower pontoon (4) and columns (5) connecting the pontoon (4) to ... | 10/10/2006 |
| 6955223 | Blow out preventer handling system A process to transport a blow out preventer for a drilling rig having a drawworks wherein the blow out preventer is transported between a storage area and a use position over a wellbore. The process includes the steps of connecting an upper connector end of an elong... | 10/18/2005 |
| 6691784 | Riser tensioning system In a substructure (10) for a floating oil or gas production platform, an arrangement to tension a plurality of risers (16) extending from the sea bed up to the substructure, the arrangement comprising: a conventional hydraulic tensioner/heave compensator ... | 02/17/2004 |
| 6622793 | Method for carrying out operations on petroleum and gas fields and deep-sea platform for realizing the same A method for carrying out operations on petroleum and gas fields is provided. The method involves using a platform which is located underwater when in working position at a depth where it is not subject to storm waves or under the lower surface of an ice ... | 09/23/2003 |
| 6579040 | Method and apparatus for air can vent systems An air-can riser tensioning device for use in the production of oil and gas at offshore locations includes at least one air-can used to place a vertical force on the riser. The air-can includes an open port that extends into the water toward the sea floor... | 06/17/2003 |
| 6488447 | Composite buoyancy module A buoyancy system for a deep water floating platform includes at least one composite buoyancy module coupled to the a riser having a length greater than 1000 feet and an associated weight. The composite buoyancy module is sized to have a volume to produce... | 12/03/2002 |
| 6435775 | Buoyancy system with buoyancy module seal A buoyancy system for a deep water floating platform includes at least one buoyancy module coupled to the a riser. The module may be coupled to a ring structure of an end cap coupled to the riser, or two modules may be coupled to a ring structure to coupl... | 08/20/2002 |
| 6408948 | Tubing handling for subsea oilfield tubing operations A tubing handling for subsea oilfield tubing operations, includes an isolation tube to mechanically and/or chemically protect the drill string and improved passage of the drill string and fluid return line to the drilling vessel that further protects them... | 06/25/2002 |
| 6244347 | Subsea well drilling and/or completion apparatus There are disclosed two embodiments of a subsea drilling, completion and/or workover apparatus which includes a spar buoy having a well therethrough, and a riser which extends through the well in the buoy for connection to the subsea wellhead during the d... | 06/12/2001 |
| 6171027 | Cantilevered jack-up platform A drilling rig, in particular for the offshore industry, in the form of a jack-up platform on which a cantilever is mounted so as to be movable at least substantially horizontally and in a first direction, with the cantilever projecting more or less outsi... | 01/09/2001 |
| 6047781 | Multi-activity offshore exploration and/or development drilling method and apparatus A multi-activity drillship, or the like, method and apparatus having a single derrick and multiple tubular activity stations within the derrick wherein primary drilling activity may be conducted from the derrick and simultaneously auxiliary drilling activ... | 04/11/2000 |
| 6000480 | Arrangement in connection with drilling of oil wells especially with coil tubing The present invention relates to an arrangement in connection with the drilling of oil wells, especially with coil tubing, and more specifically an arrangement comprising heave compensation by such drilling, comprising a first frame-like structure (3) whi... | 12/14/1999 |
| 5240081 | Mudline subsea wellhead system A subsea well drilling and completion system allows the use of a jack-up rig for drilling with completion by a floater rig. The system uses an outer wellhead housing which is run on releasable conductor riser. An inner wellhead housing is lowered through ... | 08/31/1993 |
| 5044450 | Spar-buoy boring derrick and mooring facility A spar-buoy type boring device including a main pipe and a central pipe installed in the main pipe. The main pipe, which has a service deck at the top and a float near the top so that the float stays underneath the water, is anchored at the bottom to a si... | 09/03/1991 |
| 4919065 | Submarine vehicle intended to measure data at the deep ocean sea-bottom The invention is related to a submarine vehicle for the deep ocean research. This vehicle is composed of a penetrator (1) and of a support structure (2 to 7). The vehicle descends by gravity due to a ballast disposed in the lower part (11) of the penetrat... | 04/24/1990 |
| 4913238 | Floating/tensioned production system with caisson A floating/tensioned production system for use in deepwater drilling and production operations generally combining a relatively small tension leg platform with a semisubmersible platform. The semisubmersible platform is provided with a working deck suppor... | 04/03/1990 |
| 4762185 | Off-shore drilling A semi-submersible drill rig structure includes a ring-like enclosure surrounding a central drilling axis. In the structure are magazines holding drill string elements vertically. Lifting means on the structure raise the vertical drill string elements fro... | 08/09/1988 |
| 4716972 | Floating drilling platform A floating semisubmersible off-shore drilling platform or the like comprises an upper working level portion and a lower pontoon portion. When the platform is transported from one place to another, it floats on the pontoon portion, but when it is working a... | 01/05/1988 |
| 4702321 | Drilling, production and oil storage caisson for deep water A drilling, production and oil storage caisson for use in deep water offshore well operations in which the caisson has such a deep draft that its bottom end is subject only to minimal excitation forces caused by wave, wind and current acting on the caisso... | 10/27/1987 |
| 4630681 | Multi-well hydrocarbon development system A multi-well hydrocarbon development system is economically established and operated by drilling cluster wells through the piles securing the base structure which supports a semisubmersible tension leg buoy through a single leg assembly. The buoy includes... | 12/23/1986 |
| 4502551 | Deep draft drilling platform A deep draft oil well drilling platform having a large hollow body is shaped, designed, and ballasted to have a substantial portion thereof submerged under the surface of the ocean a sufficient distance to be substantially unaffected by surface waves and ... | 03/05/1985 |
| 4305468 | Method for drilling wellbores from an offshore platform A method for drilling wellbores from an offshore platform to penetrate a subterranean formation using a combination of surface drilling techniques and subsea drilling techniques to achieve an improved effectiveness by avoiding the necessity for large cond... | 12/15/1981 |
| 4136996 | Directional drilling marine structure Marine structure adapted to be fixed to the ocean floor for drilling wellbores into the latter. A drill conductor cage is removably positioned within the marine structure at a submerged position. The cage holds one or more drill string guides in a manner ... | 01/30/1979 |
| 4100754 | Method and apparatus for installing pipes in off-shore locations Pipes which are to be inserted vertically into the sea bed for the extraction of fluids therefrom, such as liquids and gases, are connected together in groups, with each pipe group being constructed on shore and then supported horizontally by the water wh... | 07/18/1978 |
| 4068729 | Apparatus for multiple wells through a single caisson A multiple well platform is described for producing hydrocarbons, preferably using a free-standing single riser caisson. Although the wells are connected up to the surface, the largest casings (and preferably most of the other casings) are terminated at a... | 01/17/1978 |
| 4054104 | Submarine well drilling and geological exploration station A submarine well drilling and geological exploration station includes an inner pressure hull specially configured for submerged drilling and exploration and an outer fairing hull of conventional submarine design. The pressure hull is divided by an air loc... | 10/18/1977 |
