M-i Drilling Fluids UK Limited

Managed Pressure Operations Pte, Limited

Downhole Products Limited

M-l Drilling Fluids UK Limited

Circulate Plus Limited

Jonathan Peter Buckland

Christian Leuchtenberg

Rae Andrew Younger

James Linklater

James Edward Atkins

Alexander Craig Mackay

Stuart Thomas Rothnie

Alex Macgregor

James Bisset

Baptiste Gougeon

Alexander John Macgregor

A circulation valve for a well, with a housing allowing fluid flow with an outlet from the housing and a control sleeve controlling flow through the outlet. A support member supports the control sleeve, closing the outlet when the valve is in compression. The support member is slidable with respect to the control sleeve and disengages from the control sleeve when the valve is in tension, permitting movement of the control sleeve to open the outlet in response to a minimum flow rate through the valve while the valve is in tension.

Circulation valve

A guide shoe (), adapted for connection to an end of a tubular for deployment in a wellbore of an oil, gas, or water well, includes: a body () having an axis () and being adapted for connection to the tubular such that torque can be transmitted between the tubular and the body (); a nose () adapted for connection to the body (); a locking mechanism () adapted to shift between an unlocked configuration, in which rotation of the nose () around the axis of the body () is permitted in first and second directions, and a locked configuration in which rotation of the nose () around the axis of the body () is restricted in at least one of the first and second directions. The guide shoe includes a resilient biasing device () urging the nose () into the locked configuration.

Guide shoe with lockable nose

A valve assembly () for use particularly in a deviated wellbore of an oil, gas or water well comprises a body () with an axis and first and second resiliently deformable seats () to seat a valve closure member () such as a ball, the seats being deformable to allow passage of the ball at different first and second fluid pressures acting on the seated valve closure member. The first and second seats are axially spaced from one another on a control sleeve () on opposite sides of an inner end of a selectively operable fluid outlet conduit connecting the bore with an external surface of the valve assembly, and operation of the valve assembly at pressures between the first and second pressures opens and closes the outlet while maintaining the ball between the first and second seats.

Valve assembly and method of controlling fluid flow in an oil, gas or water well

A valve assembly for use in a wellbore of an oil, gas or water well, having a valve seat to seat a valve closure member such as a ball, and a control member that is adapted to cycle the valve assembly between first and second configurations of the valve assembly when the ball is seated on the seat. The valve assembly may be adapted to return the valve assembly to the first configuration when the valve closure member is seated on the seat, and may repeatedly, continuously and/or sequentially cycle from first to second configurations and back to first configuration to open and close an outlet port while the same valve member is seated on the seat. The valve seat may comprise first and second seat members and retain the ball in a cleft between the first and second seat members.

Downhole valve apparatus

A filter device housed within a body component. The filter device can include an outer filter and an inner filter positioned coaxially within the outer filter. The outer and inner filters may be composed of a material having mesh, slots, holes, or any other openings being of a sufficient size and shape to restrict passage of items of a predetermined size or larger. Formed between the inner and outer filters is a first annular space into which fluid that is provided down the drill string may enter. The filter device may also include a valve within the internal bore which regulates passage of wellbore fluid provided to the drill string, or for a wireline or slickline, to pass through the filter device in order to access other components of the drill string downhole from the filter device.

Fish through filter device

A valve assembly comprising a body having a main passage, and a valve member which is located in the main passage and which is rotatable between an open position in which the main passage is substantially open, and a closed position in which the valve member substantially blocks the main passage, and an actuator which is movable generally parallel to the longitudinal axis of the main passage, the actuator being engaged with the valve member such that movement of the actuator generally parallel to the longitudinal axis of the main passage causes the valve member to rotate between its open and closed positions.

Valve assembly

An assembly of a drill pipe and a connector () for connecting a hose () to a side-bore () of a the drill pipe (), the drill pipe () having a wall () enclosing a main bore (), and the side-bore () extending through the wall () from the main bore () to the exterior of the drill pipe (), the connector () comprising a hose connector body () which forms a first end of the connector () which is adapted to be connected to the hose (), and a drill pipe connector body () which forms a second end of the connector () which is connected to the drill pipe (), the connector () having an exterior surface and an interior surface which encloses a bore () extending from the first end of the connector () to a second end of the connector (), the drill pipe connector body () being provided with at least one bayonet connector formation () which extends from the exterior surface of the connector () generally radially outwardly relative to the bore (), the bayonet connector formation () extending over less than half of the circumference of the exterior surface of the drill pipe connector body (), wherein the drill pipe connector body () is also provided with means for ensuring a substantially fluid tight seal between the connector () and the surface of the drill pipe () enclosing the side-bore ().

Growing community of inventors

Inverurie, United Kingdom

Jonathan Peter Buckland