Downhole apparatus and method
AssigneeRed Spider Technology Limited
InventorsMichael John Christie, Stuart Gordon, Irvine Cardno Brown, Michael Adam Reid
Life of this patent
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Abstract
A downhole apparatus adapted to be run on a workstring in a well bore. The apparatus has a body including ports and a valve which is rotatable to open and close the ports to selectively allow fluid flow through the body between regions of a well bore above and below the apparatus. The valve is rotated via a gearbox and motor in the apparatus. A sealing arrangement between the valve and body is also described. A method of running the apparatus in a well bore and monitoring pressure above the apparatus in order to control opening and closing of the valve under predetermined conditions is presented.
Claims23
A downhole apparatus adapted to be run on a workstring, the apparatus comprising a body for connecting with a workstring;
- one or more ports provided in the body for passage of fluid between regions of the wellbore above and below the apparatus;
- a valve member movable relative to the body between the first position in which the ports are open to allow fluid flow there through, and a second position in which the ports are closed to prevent fluid flow there through;
- wherein the valve member is connected to a drive shaft of a gearbox and motor assembly to thereby be rotated with respect to the body between the first and second positions.
Dependencies are inferred from the claim text.