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7487836 |
Riserless modular subsea well intervention, method and apparatus
A subsea well intervention system that permits dynamic disconnection from subsea well intervention equipment without removing any of the equipment during a drive-off condition is provided. The...
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7314088 |
System for retrieving a tubular element from a well
A system is disclosed for retrieving a tubular element extending into a subsea well provided with a wellhead, the tubular element being provided with a hanger suspending the tubular element at the...
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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...
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6834721 |
System for disconnecting coiled tubing
A disconnect system for coiled tubing. A first end of the coiled tubing is disconnected from a second end of the coiled tubing by holding the coiled tubing in a stationary position at a first and a...
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6832874 |
Modular seabed processing system
To install a modular seabed processing system ( 1 ) on a seabed, a monopile foundation ( 3 ) is first lowered down and driven into the seabed. A docking unit ( 4 ) is lowered towards the installed...
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6808021 |
Subsea intervention system
A system that is usable with subsea wells that extend beneath a sea floor includes a station that is located on the sea floor and an underwater vehicle. The underwater vehicle is housed in the...
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6793019 |
Tapered ramp positive lock latch mechanism
A tool lands a flowline connector on a base and soft land the connector to a mandrel. After the tool lands on the base, the tool locks to the base and then pushes the connector the mandrel until it...
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6622799 |
Method for subsea pod retrieval
A method for controlling subsea drilling operations including, in at least certain aspects, controlling the subsea drilling operations with a control system having three subsea pod containers of a...
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6588509 |
Well casing installation and removal apparatus and method
A downhole well drilling apparatus includes an above-ground mast and an axially elongated generally cylindrical pneumatic hammer drill supported by the mast and mounted in an axially vertical...
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6422315 |
Subsea drilling operations
A method for retrieving a subsea pod from a lower marine riser package platform by connecting a buoyant pod retriever to the subsea pod and raising the subsea pod to the surface. In certain...
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6182762 |
Storm valve
A method and apparatus for temporarily storing the lower portion of a string of drill pipe in a well which has a cased portion wherein a packer, installed between a storm valve located below the...
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6142233 |
Tree running tool with actuator for latch
A tree running tool is provided which has a means for actuating a latch for latching a side valve tree to a wellhead. Also disclosed is a tree running tool having an external axially movable...
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6113314 |
Disconnectable tension leg platform for offshore oil production facility
A quick connect/disconnect system for an offshore oil/gas production platform is facilitated by a submerged connection header for the platform. The platform comprises a vessel with a connection bay...
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6062312 |
Tree running tool with emergency release
In accordance with certain preferred aspects of the present invention, there is provided tree running tool with a mechanical mechanism for unlatching the tree running tool from a side valve tree....
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6015013 |
Lightweight intervention system for use with horizontal tree with internal ball valve
A lightweight intervention apparatus is described for use with a single bore intervention operation and which is suitable for use with a sub-sea horizontal tree with a tree cap and integral ball...
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5947642 |
Method and apparatus for connecting an underwater flexible riser to a structure on the surface
The present invention relates to an apparatus and to a method for facilitating the connection of underwater flexible risers coming from the sea bed at any point located above the sea surface on a...
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5657823 |
Near surface disconnect riser
An offshore marine structure for drilling wells into the ocean floor including a floating vessel which carries the necessary drilling equipment. A riser which extends from the vessel to a well head...
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5480521 |
Tendon foundation guide cone assembly and anode
A method of providing a cathodic protection to an installed pile is disclosed in which a plurality of anodes are provided on a tendon foundation guide assembly which is attached to a lowering unit...
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5199495 |
Split wear bushing for a drilling rig
A split wear bushing for a subsea well assembly provides a standoff for the drill pipe to avoid damage to the casing near where it secures to the casing hanger. The split wear bushing has an outer...
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5146990 |
Anchoring structure for marine riser assembly
An anchor system for temporarily anchoring the lower end of a lower marine riser package (LMRP) assembly, drilling riser, and drill string used in drilling subsea wells. The anchor system includes...
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5143483 |
Hydraulic stab subassembly for remotely operated vehicle vertical interface tool
An hydraulic stab sub for use in a remote location that can be inserted into a receptacle with the seals in a retracted position. The seals are expanded to a sealing portion using hydraulic...
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5129459 |
Subsea flowline selector
A flowline selector device has a housing with a single passage at the upper end and two or more passages at the lower end. A tube connects to the upper end and has a lower end that is offset from...
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5088556 |
Subsea well guide base running tool
A running tool for use with a subsea well guide base when drilling from a floating drill ship is designed to be releasably detached without rotation so that the tool can be uncoupled at the surface...
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5002129 |
Removable guide post
Guide posts for any part of a sub-sea oil or gas installation can be installed in or removed from a guide foot solely by vertical movement. The guide post end has a surrounding locking sleeve...
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4987956 |
Apparatus for use in drilling a well at an offshore location
Apparatus is disclosed for use in drilling an offshore well wherein a drill string suspended from a drill ship for extension within a riser pipe, lower marine riser package and subsea wellhead...
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4986359 |
Release apparatus and method for threaded conductor pipe
A torque tool and mating profile allow large diameter conductor pipe to easily be retrieved from a subsea well. The profile will be located near the sea floor immediately above a left-hand threaded...
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4917195 |
Quick latch mud mat apparatus
A subsea drilling drive pipe apparatus for drilling offshore wells from a floating vessel into the ocean floor. An elongated drilling drive pipe including a plurality of locking pads which are...
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4911243 |
Method for disconnecting a marine drilling riser assembly
Disclosed is a method for disconnecting a marine riser assembly from a subsea wellhead when the marine riser assembly contains substantially gas, the marine riser assembly comprising a riser and a...
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4907914 |
Tether connector for a tension leg platform
A releasable latch-type connector for a tension leg platform tether. A tether portion of the latch is provided with an annularly arranged set of shear lugs. The tether portion of the latch is...
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4902044 |
Well apparatus
There is disclosed a subsea wellhead connector comprised of a lower tubular member mounted on the upper end of a lower wellhead member, and an upper tubular member suspended from an upper wellhead...
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4901803 |
Method and equipment for performing drilling operations and servicing in an underwater well from a floating surface installation
Apparatus for performing drilling operations and for servicing an underwater well from a surface installation comprises a main string that is removable from the top of the wellhead in a way that is...
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4872708 |
Production tieback connector
A subsea tieback connector including an annular body having an external downwardly facing shoulder with high pressure gasket type sealing means therein, a sleeve positioned within said annular body...
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4859117 |
Reversible mechanical coupling, particularly for tensional anchorages
A reversible mechanical coupling to be clamped in a suitable seat by means of clamping levers and wedges, in which the clamping levers are pivoted to arms rigid with said wedges by two lateral...
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4856594 |
Wellhead connector locking device
A wellhead connector for connecting a riser to a wellhead in a subsea well remains connected even though hydraulic pressure is removed. The wellhead connector has a housing which slides over the...
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4836288 |
Casing hanger and packoff running tool
A well tool for running, landing and setting a casing hanger and a packoff in a wellhead housing, and pressure-testing the integrity of the packoff seal, all in a single trip into the well.
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4828035 |
Subsea guidepost latch mechanism and method for using
A subsea guidepost latch mechanism which latches a guidepost to a guidepost-receptacle by means of an external snap ring on the guidepost and an internal groove in the guidepost-receptacle. The...
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4813496 |
Drill ahead tool
A drill ahead tool for drilling the initial portion of a subsea well allows an operator to drill ahead after running conductor pipe. The running tool locates in the wellhead housing secured to the...
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4809784 |
Tool for underwater connections on an oil production station
Sphere of application: underwater oil production installations using electrical and hydraulic interconnections between the various assemblies of the underwater station such as well heads, control...
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4732214 |
Subsea production test valve assembly
A subsea test assembly securable in a subsea blowout preventer stack is used in methods for performing wellbore tests and for disconnecting a tubular string from a subsea wellhead. The test valve...
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4693315 |
Bleedoff tool for well test system
Disclosed is a safety system for well testing, utilizing a new and novel bleedoff tool in the subsea test tree handling string, which provides rapid pressure reduction in the handling string and...
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4673041 |
Connector for well servicing system
A remotely operable connector having releasably connectable male and female members. The male member sealingly engages the female member on connection. The female member houses radially moveable...
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4666340 |
Offshore platform with removable modules
A method and apparatus for positioning drilling equipment modules on an offshore platform apparatus which are removeably connected to the platform and adapted to contain equipment associated with...
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4619324 |
Wellhead connector locking mechanism
A wellhead connector assembly allows connection of a wellhead connector to a subsea wellhead without requiring hydraulic components to remain with the wellhead connector. The connector has latch...
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4611662 |
Remotely operable releasable pipe connector
A remotely releasable pipe connector is described and comprises a first tubular connector or "pin connector" having at least one laterally extending locking member, and a slotted second tubular...
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4611661 |
Retrievable exploration guide base/completion guide base system
A system for connecting an exploratory well into a producing well by retrieving a permanent guide base (P) and replacing the same with a completion guide base (C) containing the necessary equipment...
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4609304 |
Apparatus for enabling a self-contained submersible module including a length of conduit for connection to a collector to be repetitively put into place and removed
Apparatus for enabling a self-contained submersible module including a length of conduit for connection to a collector to be repetitively put into place and removed. The collector (3) is located on...
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4602893 |
Ring gasket installation tool
A method and apparatus are described for the installation and removal of a ring gasket from an underwater wellhead connection. The ring gasket is carried by a ring gasket installation tool from the...
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4585369 |
Mechanical connection means
This connection means comprises a male connector (1) with a circular groove (5) and a female connector comprising a body (2), a cap (3) and a sleeve (4). The cap (3) hangs from the bottom end of...
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4550781 |
Method of and apparatus for cutting and recovering of submarine surface casing
A method of cutting and retrieving submarine well casing which includes the steps of lowering a tool on a string into the bore of the well casing which tool includes a casing cutter, a bumper sub...
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4523878 |
Remotely replaceable guidepost method and apparatus
A method and apparatus for remotely replacing damaged guideposts attached to a subsea structure are provided. A receptacle is permanently attached to the subsea structure. The guidepost is inserted...
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