Downhole valve assembly

摘要

A downhole valve assembly operable to control production fluid flow around an obstruction in a production tubing string. The obstruction may be caused by another valve or valve assembly located in the production tubing string, where the valve is closed and blocks flow through the production tubing. The downhole valve assembly comprises a tubular body that includes an axial passage extending through the body and one or more ports extending substantially radially through the body. The downhole valve assembly also includes one or more actuating members operable to move relative to the body. Movement of the actuating members selectively opens the ports such that a fluid flow path through the ports is defined between an annulus region outside of the valve assembly and the axial passage such that the blockage can be bypassed.

主权项

1. A downhole valve assembly operable to control production fluid flow around an obstruction in a production tubing string; wherein the downhole valve assembly comprises:
a tubular body comprising an axial passage extending through the body; one or more ports extending substantially radially through the body; and one or more actuating members operable to move relative to the body to selectively open the ports such that a fluid flow path through the ports is defined between an annulus region outside of the valve assembly and the axial passage, at least one of the actuating members comprises a mechanically actuated actuating member adapted for mechanical engagement with a retrievable downhole tool such that as the downhole tool is retrieved from a surrounding wellbore towards a terranean surface and removed from the downhole valve assembly, the mechanically actuated actuating member is simultaneously moved relative to the tubular body from a first position, in which the valve assembly is in an unprimed state where the ports are closed and further operation of the one or more actuating members to open the ports is inhibited; to a second position in which the valve assembly is in a primed state where the ports are closed and further operation of the one or more actuating members to open the ports is permitted.