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| Number | Title | Issue Date |
| 7380614 | Remotely operated water bottom based drilling system using cable for auxiliary operations A method for drilling formations below the bottom of a body of water includes disposing a drilling system on the bottom of the body of water. The formations are drilled by rotating a first drill rod having a first core barrel latched therein and advancing the drill ... | 06/03/2008 |
| 7367143 | Cutter and method for working the soil A cutter for working the soil includes a cutting frame, at least two cutting wheels that are supported on the cutting frame in a rotatably drivable manner about parallel axes of rotation, and an adjusting device, The adjusting device functions to adjust the center d... | 05/06/2008 |
| 7299867 | Hanger mounted in the bore of a tubular component A hanger mounted within a bore of a tubular string component has a split ring, a tapered key and a passageway formed in the hanger. The split ring has interfacial surfaces cooperating with interfacial surfaces of the tapered key. The bore may be located within a tub... | 11/27/2007 |
| 7270185 | Drilling system and method for controlling equivalent circulating density during drilling of wellbores A drilling system for drilling subsea wellbores includes a tubing-conveyed drill bit that passes through a subsea wellhead. Surface supplied drilling fluid flows through the tubing, discharges at the drill bit, returns to the wellhead through a wellbore annulus, and... | 09/18/2007 |
| 7264057 | Subsea intervention A method and system of subsea intervention comprises lowering one or more assemblies of intervention equipment into the sea. Underwater marine units (such as remote operated vehicles or small submarines) may be employed to connect the assemblies to each other and to... | 09/04/2007 |
| 7261164 | Floatable drill cuttings bag and method and system for use in cuttings disposal In aspects, embodiments of the present invention provide devices, systems and methods for managing cuttings formed during drilling of a subsea wellbore. By managing, it is meant the processing, storage, transportation and disposal of the cuttings. In an exemplary ap... | 08/28/2007 |
| 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 |
| 7252159 | Underwater rock boring apparatus having differential global positioning system receiver and boring method thereof The present invention relates to an underwater rock boring apparatus having differential global positioning system receiver and boring method thereof, new boring technology—a satellite navigation device orients the accurate position of a target—is brought to the... | 08/07/2007 |
| 7252150 | Downhole tool A downhole tool including a selectively releasable joint, a downhole drilling assembly including the downhole tool, and a corresponding method. In one embodiment of the invention, a downhole drilling assembly includes a downhole tool having a first body and a second... | 08/07/2007 |
| 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 |
| 7185705 | System and method for recovering return fluid from subsea wellbores A subsea return fluid recovery system for recovering drilling fluid and cuttings (“return fluid”) from a subsea wellbore in one embodiment includes a hub at the opening of the subsea wellbore that directs fluid into a transport device. In one embodiment, the hub... | 03/06/2007 |
| 7165634 | Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells The steel drill string attached to a drilling bit during typical rotary drilling operations used to drill oil and gas wells is used for a second purpose as the casing that is cemented in place during typical oil and gas well completions. Methods of operation are des... | 01/23/2007 |
| 7147068 | Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells The steel drill string attached to a drilling bit during typical rotary drilling operations used to drill oil and gas wells is used for a second purpose as the casing that is cemented in place during typical oil and gas well completions. Methods of operation are des... | 12/12/2006 |
| 7093662 | System for drilling oil and gas wells using a concentric drill string to deliver a dual density mud A system for controlling drilling mud density at a location either at the seabed (or just above the seabed) or alternatively below the seabed of wells in offshore and land-based drilling applications is disclosed. The present invention combines a base fluid of lesse... | 08/22/2006 |
| 7055623 | Method for the drilling of the initial phase of deep water oil wells with an underwater well head Improved method for the drilling of the initial phase of deep water oil wells with an underwater well head consisting in the positioning and cementation of the conductor pipe and anchorage casing by means of a single drilling phase. A tapered hole (with a double dia... | 06/06/2006 |
| 7048050 | Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells The steel drill string attached to a drilling bit during typical rotary drilling operations used to drill oil and gas wells is used for a second purpose as the casing that is cemented in place during typical oil and gas well completions. Methods of operation are des... | 05/23/2006 |
| 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 |
| 7036610 | Apparatus and method for completing oil and gas wells A method of drilling and completing a wellbore in a geological formation to produce hydrocarbons from a well comprising at least the following four steps: drilling the well with a retrievable drill bit attached to a casing; removing the retrievable drill bit from th... | 05/02/2006 |
| 7027968 | Method for simulating subsea mudlift drilling and well control operations A method of simulating subsea mudlift drilling well control operations using a computer system. The method includes simulating a drilling circulation system. The simulation includes simulating drilling the wellbore at a selected rate of penetration, and the simulati... | 04/11/2006 |
| 7018164 | Auxiliary pipe loading device A pipe handling device with an auxiliary pipe loading device for use with a horizontal boring machine is disclosed. The auxiliary pipe loading device includes an auxiliary pipe receiving member that is connected to a pipe handling assembly at a location remote from ... | 03/28/2006 |
| 6968902 | 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 cased. Then a tubing hanger is run through a drilling riser and landed in the wellhead housing. The... | 11/29/2005 |
| 6926089 | Downhole actuation system utilizing electroactive fluids Downhole wellbore tools are actuated by electrically controllable fluids energized by a magnetic field, for example. When energized, the viscosity state of the fluid may be increased by a degree depending on the fluid formulation. Reduction of the controllable fluid... | 08/09/2005 |
| 6907931 | Method and device for driving into the marine subsurface at great depths, a tubular tool for soil sampling or for measuring soil characteristics The invention concerns a device for driving into the marine subsurface, in particular at great depths exceeding a thousand meters, a tubular tool for soil sampling or for measuring said soil characteristics. The invention is characterized in that the tubular tool ( | 06/21/2005 |
| 6705411 | Downhole coring device The invention relates to a downhole rotary coring device placeable in a drill string and comprising a head section, a motor, and a core barrel having an outer motor comprising a rotor connected to the outer barrel and a stator to the head section, whereby the rotor ... | 03/16/2004 |
| 6390206 | Core sampler A hydrostatic working device for taking samples from the bottom of the sea. The working device has an outer tube (1), the cylinder tube (1), the cylinder tube with lead-through (5 and 7), and an inner tube (2), the sampling tube with a piston, whereby the... | 05/21/2002 |
| 6374924 | Downhole drilling apparatus A downhole drilling apparatus for interconnection in a casing or liner string having a drill bit disposed thereon for enabling the drilling of intersecting wellbores without removal of the drill bit is disclosed. In a disclosed embodiment, the apparatus c... | 04/23/2002 |
| 6315061 | Brine-based drilling fluids for ballast tank storage Drilling fluids are stored in the ballast compartments of drilling vessels to reduce the dependency of a drilling operation on the supply of drilling fluids from work boats. The composition of the brine-based drilling fluid stored in the ballast compartme... | 11/13/2001 |
| 6273645 | Position penetrated anchor system The invention relates to a method for installing anchors on the bottom of the sea. Wires (4) and a suction anchor (2) are attached to a frame (1). Through the centre of the frame's vertical axle a mounting device (6) for an anchor holder (7) is placed. Th... | 08/14/2001 |
| 5456325 | Method and apparatus for driving a probe into the earth A remotely actuated clamping apparatus for obtaining a secure coupling between a vibration unit generating longitudinally directed driving forces and a probe designed for penetrating the earth, such as into underwater sediments at water depths too great f... | 10/10/1995 |
| 5035291 | Seafloor drilling apparatus Apparatus for drilling a large diameter hole in the surface of a material includes an upper body; a lower body rotatably connected to the upper body; a motor for rotating the lower body relative to the upper body; cutting discs, connected to the lower bod... | 07/30/1991 |
| 4964473 | Method for driving a hydraulic submerged tool Method for driving a hydraulic submerged tool whereby the hydraulic pressure energy is generated in a submerged power converter, being driven by pressurized surrounding water which after the energy transfer is exhausted into the surrounding water, said po... | 10/23/1990 |
| 4817734 | Submergible electrohydraulic drive unit for ramming and working devices to be used under water A submergible electrohydraulic drive unit is a multi-purpose device for driving different underwater ramming and working devices and has a housing with a throughgoing central receiving space for a ramming pile or a respective ramming or working device, ri... | 04/04/1989 |
| 4813495 | Method and apparatus for deepwater drilling A method and apparatus for drilling subsea wells in water depths exceeding 3000 feet (preferably exceeding 4000 feet). Drilling mud returns are taken at the seafloor and pumped to the surface by a centrifugal pump that is powered by a seawater driven turb... | 03/21/1989 |
| 4770255 | Arrangement for underwater drilling of foundations The invention concerns an arrangement for underwater drilling of foundations, comprising at least one cutter (27) and one pump (29) for discharge of excavated material, and hydraulic motors for driving the said cutter and the said pump. It comprises an hy... | 09/13/1988 |
| 4759413 | Method and apparatus for setting an underwater drilling system A method and apparatus for setting an underwater conductor pipe in which the conductor pipe is lowered into the wellhole on a drill string as the borehole is being formed by a drill bit and underreamer positioned at the end of the drill string below the e... | 07/26/1988 |
| 4640552 | Method and apparatus for splitting ice masses A method and apparatus is disclosed for breaking apart large masses of ice wherein a borehole is drilled into a mass of ice, the hole is blocked and pressurized to split the ice mass.... | 02/03/1987 |
| 4579484 | Underwater tapping machine An underwater tapping machine having a body equipped for attachment to a fitting secured to a pipeline and a rotatable boring bar within the body, a gear case affixed to the body to activate the boring bar, a containment vessel supported by the tapping ma... | 04/01/1986 |
| 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 |
| 4255068 | Method and a device for undersea drilling The method consists in boring a shaft in the sea floor to form a drilling station of sufficient size to accommodate personnel and equipment, in lining the shaft walls with a casing which is cemented against the walls and surmounted by a water-tight self-c... | 03/10/1981 |
| 4234046 | Pressure differential seafloor corer-carrier A pressure differential seafloor corer-carrier for obtaining long core samples of seafloor sediments. The corer-carrier is composed of two main components: The first component is a pump assembly that pumps seawater and sediment as to create a negative pre... | 11/18/1980 |
