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8863858 System and method for managing heave pressure from a floating rig  
A system compensates for heave-induced pressure fluctuations on a floating rig when a drill string or tubular is lifted off bottom and suspended on the rig, such as when tubular connections are...
8833462 Method and system for installing subsea well trees  
The disclosure provides a method and system of installing subsea well trees, comprising: creating a glory hole having a depth below a seabed at a well location of a hydrocarbon reservoir; moving a...
8833463 Above mudline whipstock for marine platform drilling operations  
A whipstock system for drilling a wellbore from a water bottom supported platform having wellbores with conductor pipes disposed through guide slots in a template on the bottom of a body of water...
8833465 Subsea differential-area accumulator  
An accumulator for a subsea blowout preventer unit including a blowout preventer includes a body. The body includes a hydraulic fluid chamber and a gas chamber. The hydraulic fluid chamber has a...
8800666 Method for lightening a riser pipe with optimized wearing part  
A riser pipe for drilling an offshore well comprises a main tube extending the well up to a floating support, an auxiliary line being arranged parallel to main tube (4a, 4b). The auxiliary line...
8783379 Fluid transfer device usable in managed pressure and dual-gradient drilling  
A fluid transfer device for use in wellbore drilling includes at least one pressure vessel having a fluid port at a bottom thereof for entry and discharge of a working fluid and a fluid port at a...
8770297 Subsea internal riser rotating control head seal assembly  
An RCD is used to provide a system and method for sealing a marine riser having a rotatable tubular. A bypass internal channel or external line may be used to allow fluid to bypass the RCD seal. An...
8757289 Underwater drilling arrangement and method for making a bore in a bed of a water body  
The invention relates to an underwater drilling arrangement and a method for making a bore in a bed of a lake, sea or river, having a service platform which can be lowered for positioning on the...
8733472 Multi-operational multi-drilling system  
A system including a setback and racking system and a set of wellbay accesses, at least a portion of the setback and racking system positioned at an elevation lower than the elevation of the...
8720577 Downhole swivel apparatus and method  
What is provided is a method and apparatus which can be detachably connected to an annular blowout preventer thereby separating the drilling fluid or mud into upper and lower sections and allowing...
8720603 Underwater drilling arrangement and method for making a bore  
The invention relates to an underwater drilling arrangement for making a bore in the bed of a lake, sea or river with a platform which can be lowered for positioning on the bed of the lake, sea or...
8678094 Multiple activity rig  
An offshore platform may include a pair of trolleys. One trolley may be mounted on top of the platform and the other trolley may be suspended below the platform. Each trolley may be positioned on...
8668028 Underwater drilling arrangement and method for introducing a tubular foundation element into the bed of a body of water  
The invention relates to an underwater drilling arrangement for introducing a tubular foundation element into the bed of a body of water comprising at least one rotary drill drive, whereby a drill...
8640775 Multi-deployable subsea stack system  
Methods for deploying a subsea blowout preventer stack system comprising a lower marine riser package, a blowout preventer stack with a first ram blowout preventer, and an additional blowout...
8640778 Systems and methods for subsea drilling  
A subsea drilling method and system for controlling the drilling fluid pressure, where drilling fluid is pumped down into the borehole through a drill string and returned back through the annulus...
8607895 Drilling fluid additive for reducing lost circulation in a drilling operation  
Generally, the present invention provides drilling fluid additives for reducing or controlling lost circulation in a drilling operation. The additives comprises particles. The particles comprise...
8607894 Offshore thermal treatment of drill cuttings fed from a bulk transfer system  
A system for offshore disposal of drill cuttings including a cleaning system for treating contaminated drill cuttings into drill cuttings and contaminants; a transport system for moving the drill...
8590634 Subsea drilling  
A subsea cutting device for a subsea blow-out preventer or wellhead comprises a tubular body having an axial throughbore, and configured to be fitted to a casing string, the cutting device further...
8567507 Rotating and reciprocating swivel apparatus and method  
What is provided is a method and apparatus wherein a swivel can be detachably connected to an annular blowout preventer thereby separating the drilling fluid or mud into upper and lower sections...
8561705 Lead impression wear bushing  
A wear bushing having a lead impression block is landed axially above a casing hanger and actuated to test an elevation of lock ring grooves formed in a wellhead. Then, drilling operations are...
8517111 Systems and methods for circulating out a well bore influx in a dual gradient environment  
Methods and systems for drilling subsea wells bores with dual-gradient mud systems include drilling the subsea well bore while employing a subsea pumping system, a subsea choke manifold and one or...
8453758 Dual density mud return system  
Systems and methods for lifting drilling fluid from a well bore in a subsea formation are disclosed. Some system embodiments include a drill string suspended within a drilling riser to form the...
8443898 Wellhead safety device  
A wellhead safety device can include a tubular with outer surface portions having different diameters. A first seal groove can be disposed on a first outer diameter. A locking groove can be formed...
8403059 External jet pump for dual gradient drilling  
An apparatus comprises a jet pump assembly affixed to a riser string and to a blowout preventer. The jet pump assembly comprises a conduit and a sealing assembly configured to accelerate a drilling...
8387704 System and method for simultaneous sea drilling operations  
A system and method for carrying out simultaneous operations of assembling, dismantling, and maintaining equipment installed by an oil rig, using the tools, systems, and the areas available on the...
8387705 Systems and methods for running casing into wells drilled with dual-gradient mud systems  
Systems and methods for running and cementing casing into wells drilled with dual-gradient mud systems include running casing through a subsea wellhead connected to a marine riser, the casing...
8365830 Multi-deployable subsea stack system  
Methods for deploying a subsea blowout preventer stack system comprising a lower marine riser package, a blowout preventer stack with a first ram blowout preventer, and an additional blowout...
8347982 System and method for managing heave pressure from a floating rig  
A system compensates for heave induced pressure fluctuations on a floating rig when a drill string or tubular is lifted off bottom and suspended on the rig, such as when tubular connections are...
8342249 Offshore drilling system  
According to one or more aspects of the invention, a method for drilling an offshore wellbore into a seabed from a platform positioned proximate to the water surface comprises making-up a first...
8322460 Dual density mud return system  
Systems and methods for lifting drilling fluid from a well bore in a subsea formation are disclosed. Some system embodiments include a drill string suspended within a drilling riser to form the...
8322439 Arrangement and method for regulating bottom hole pressures when drilling deepwater offshore wells  
An arrangement and a method to control and regulate the bottom hole pressure in a well during subsea drilling at deep waters: The method involves adjustment of a liquid/gas interface level in a...
8322432 Subsea internal riser rotating control device system and method  
An RCD is used to provide a system and method for sealing a marine riser having a rotatable tubular. A bypass internal channel or external line may be used to allow fluid to bypass the RCD seal. An...
8316963 Cuttings processing system  
A method for using a vessel assembly including two or more vessels in multiple drilling unit operations, the method including using a vessel in the container assembly for cuttings storage, and...
8316945 Downhole swivel apparatus and method  
What is provided is a method and apparatus which can be detachably connected to an annular blowout preventer thereby separating the drilling fluid or mud into upper and lower sections and allowing...
8176985 Well drilling and production using a surface blowout preventer  
Production and drilling may be achieved by a system which uses a rotating head coupled to surface blowout preventer stack for fluid flow control. A casing connects these surface components to a...
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...
8157014 Subsea solids processing apparatuses and methods  
In a dual-gradient drilling apparatus, a subsea solids processing unit includes a housing, a solids processing mechanism disposed in the housing between a drilling mud inlet and a drilling mud...
8120508 Cable link for a wellbore telemetry system  
A cable link may include a first link connector in signal communication with at least one sensor in a drill string and coupled to the drill string, a second link connector spaced apart from the...
8118102 Downhole swivel apparatus and method  
What is provided is a method and apparatus wherein a swivel can be detachably connected to an annular blowout preventer thereby separating the drilling fluid or mud into upper and lower sections...
8087466 Centralization and running tool and method  
The invention relates to a centralization and running tool (CTR) in a subsea installation in connection with offshore related oil and gas exploration, where the subsea installation (SCM) is...
8079426 Integrated drilling deck and bop handling  
A method for handling a blow-out-preventer on a drilling platform and a drilling platform having a lower pontoon structure; a plurality of columns extending upwards from the lower pontoon...
8011435 Subsea lateral drilling  
A method for drilling a borehole in a producing subsea wellbore wherein a flexible conduit is connected at one end to a surface vessel and at the other end via a pressurized subsea wellhead to the...
7975770 Dual-BOP and common riser system  
The disclosure is drawn to methods of drilling wells utilizing blow out prevention components of differing pressure ratings. In the initial drilling phase, a lower pressure rated blow out...
7975771 Method for running casing while drilling system  
At least a portion of a subsea well is drilled casing-while-drilling techniques. A landing shoulder is formed within an outer string of a casing. The outer string of casing is secured to an outer...
7968184 Erosion resistant surface and method of making erosion resistant surfaces  
An erosion resistant surface using a dense array of elastic whiskers to slow the velocity of erosive particles before impacting with the surface. A carbon nanotube forest is grown on the surface to...
7958948 Method and system for return of drilling fluid  
A system and method is described for use and return of drilling fluid/cuttings from a well, which is drilled on the ocean floor, in connection with offshore related oil production and gas...
7950452 Anti-fouling system for offshore drilling structures  
An anti-fouling system for offshore drilling structures which injects metallic ions into seawater pumping systems. An ion generator may be positioned at various positions including the strainer...
7950463 Method and arrangement for removing soils, particles or fluids from the seabed or from great sea depths  
A method for removing soils, particles or fluids from the seabed or from great sea depths, includes positioning a platform or a vessel above an offshore location, lowering a riser from the vessel...
7938190 Anchored riserless mud return systems  
A riserless mud recovery system including a mud return line secured by an anchor is disclosed. Some system embodiments for drilling a well bore in an offshore location having a water surface and a...
7921917 Multi-deployable subsea stack system  
Methods for deploying a subsea blowout preventer stack system comprising a lower marine riser package, a blowout preventer stack with a first ram blowout preventer, and an additional blowout...
Matches 1 - 50 out of 217 1 2 3 4 5 >