Pilot Drilling Control Limited

Other

Frank's International, Inc.

Swietlik, George

Mcloughlin, Stephen John

George Swietlik

Robert Large

Stephen John McLoughlin

Matthew Clubb

Burney J Latiolais, Jr

Dougal Hugo Brown

Burney Latiolais

Stuart Card

Peter Ryan Morris

Christopher David Down

Joseph Fitzgerald

Malcolm Adrian Abbott

Alan Payne

Ryan Peter Morris

Stephen John Mcloughlin

A flow stop valve positionable in a downhole tubular, and a method, in which the flow stop valve is in a closed position when a pressure difference between fluid outside the downhole tubular and inside the downhole tubular at the flow stop valve is below a threshold value, thereby preventing flow through the downhole tubular. The flow stop valve is in an open position when the pressure difference between fluid outside the downhole tubular and inside the downhole tubular at the flow stop valve is above a threshold value, hereby permitting flow through the downhole tubular.

Flow stop valve

A flow stop valve () for placement in a downhole tubular operating in a dual fluid density system, wherein the flow stop valve is arranged such that it is in communication with a pressure difference between one of: fluid outside the downhole tubular and inside the downhole tubular at the flow stop valve; and fluid above and below the flow stop valve inside the downhole tubular, wherein the flow stop valve comprises a first valve element () arranged such that the pressure difference acts across at least a portion of the first valve element and that the first valve element is movable between open and closed positions under action of said pressure difference so as to selectively permit flow through the downhole tubular, wherein the first valve element comprises a first passage () arranged so as to transmit fluid from a first port () in a first side of the first valve element to a second side of the first valve element, the first port being positioned such that it is adjacent to a low pressure flow region () when the flow stop valve is in an open position.

A downhole device comprising a mandrel suitable for connection to a drilling assembly, a housing surrounding the mandrel with the housing being suitable for connection to the alternate end of a drilling assembly and a compensating mechanism configured to adjust an axial force applied to said mandrel by changing the relative position of the mandrel with respect to the housing.

Method system and apparatus for reducing shock and drilling harmonic variation

A flow stop valve () positionable in a downhole tubular (), and a method, are provided. The flow stop valve () is in a closed position when a pressure difference between fluid outside the downhole tubular () and inside the downhole tubular () at the flow stop valve () is below a threshold value, thereby preventing flow through the downhole tubular. The flow stop valve () is in an open position when the pressure difference between fluid outside the downhole tubular () and inside the downhole tubular () at the flow stop valve () is above a threshold value, thereby permitting flow through the downhole tubular ().

A downhole assembly for insertion into a borehole comprising an articulated mandrel, a passive and an active damping mechanism operating on said mandrel for exercising control over torsional stick-slip and further proposing an improvement over the prior art which diminishes lateral shock.

Downhole assembly

A flow stop valve positioned in a downhole tubular, particularly a flow stop valve which may be used with a dual density fluid in deep sea drilling or cementing application. The flow stop valve includes a housing and first and second receiving portions attached to first and second ends of the housing. A flow through the valve is selectively permitted between the housing and the first and second receiving portions. A valve element, such as a spindle, is slidably received in the first and second receiving portions. The valve element and housing together form a valve to selectively prevent flow through the flow stop valve. A first end face of the valve element and the first receiving portion define a first chamber and a second end face of the valve element and the second receiving portion define a second chamber.

Flow stop valve and method

A downhole tubular connector comprising a first body portion and a seal provided on the first body portion, the seal being adapted to selectively provide a seal with a downhole tubular, the downhole tubular connector further comprises a seal protector, wherein one of the seal protector and seal is movable with respect to the other of the seal protector and seal, the seal protector or seal being movable from a first position, in which at least a portion of the seal is protected by a first end of the seal protector, to a second position, in which the portion of the seal is exposed. The seal protector may be disposed so as to be movable from the first position to the second position by contact of the sleeve with the downhole tubular as the downhole tubular connector is brought into engagement with the downhole tubular.

Downhole tubular connector

A hydraulic connector to provide a fluidic connection between a fluid supply and a downhole tubular, the connector comprising: a body; an engagement assembly comprising an extendable portion selectively extendable from the body, the engagement assembly being configured to extend and retract a seal assembly disposed at a distal end of the extendable portion into and from a proximal end of the downhole tubular; and a valve assembly operable between an open position and a closed position, the valve assembly being configured to: allow a fluid to communicate between the fluid supply and the downhole tubular through the seal assembly when in the open position; and prevent fluid communication between the fluid supply and the downhole tubular when in the closed position.

A method to connect a lifting assembly to a bore of a downhole tubular includes providing a communication tool to a distal end of the lifting assembly, the communication tool comprising a body assembly, an engagement assembly, a valve assembly and a seal assembly, sealingly engaging a first portion of the seal assembly in the bore of the downhole tubular, selectively permitting fluid to flow between the lifting assembly and the downhole tubular with the valve assembly, and disengaging the first portion of the seal assembly from the bore of the downhole tubular.

Hydraulic connector apparatuses and methods of use with downhole tubulars

A tool to direct a fluids from a lifting assembly and a bore of a downhole tubular includes an engagement assembly configured to selectively extend and retract a seal assembly disposed at a distal end of the tool into and from a proximal end of the downhole tubular and a valve assembly operable between an open position and a closed position, wherein the valve assembly is configured to allow fluids from the lifting assembly to enter the downhole tubular through the seal assembly when in the closed position and wherein the valve assembly is configured to allow fluids from the downhole tubular to be diverted from the lifting assembly when in the open position.

A hydraulic connector to provide a fluid tight connection between a fluid supply and a downhole tubular includes an engagement assembly configured to extend and retract a seal assembly disposed at a distal end of the hydraulic connector into and from a proximal end of the downhole tubular, and a valve assembly operable between an open position and a closed position, wherein the valve assembly is configured to allow the fluids to communicate between the fluid supply and the downhole tubular through the seal assembly when in the open position, and wherein the valve assembly is configured to prevent fluid communication between the fluid supply and the downhole tubular when closed position.

A connector () which provides a fluid tight connection between a fluid supply and a drill-string (), the connector () comprising a piston-rod () and a cylinder (), the piston-rod () having a seal at or towards its free end which is adapted to sealingly engage the drill-string () when the piston-rod () is at least partially extended from the cylinder ().

Drill-string connector

A downhole drilling toolcomprises a drillstring, a drilling head, and a freewheelfor transferring drive from the drillstring to the drilling head. The freewheelis positioned between the drillstringand the drilling head

Downhole drilling tool

A downhole tool comprises a joint, and a resilient memberwhich extends through the joint and provides a restoring force which tends to strengthen the joint. The joint may comprise a flex couplingwhich allows limited articulation of the joint. First and second drill string sectionsmay be interconnected by the joint, the resilient memberbeing fixed to interior surfaces of the first and second drill string sectionsA downhole tool may also comprise primary and secondary sleevesthat are supported relative to the mandrelof the drill string. Rotational drive may be transferred from one of the sleeves to the other.

Downhole fluid-tight flexible joint

A drill string tool such as a drill string stabilizer () comprises a circumferentially continuous bearing sleeve () having an outside diameter which is equal to or greater than the outside diameter of a radially outermost part of the drill string tool.

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Lowestoft, United Kingdom

George Swietlik