| 摘要 |
Apparatus and method for a providing a completion assembly (15) for running at an end of a completion string (10) which provides a remotely operable tubing mounted valve (30) used to control the flow of fluids through the tubing in hostile well conditions. The tubing mounted completion assembly has a tubular body for connection in the string below a production packer (16) with a through bore from a first inlet and a first outlet coaxially aligned with the string; a downhole electronic actuating mechanism (32), a downhole hydraulic pump (34) and a hydraulically operated ball valve member (50). The actuating mechanism operates the hydraulic pump to provide a hydraulic control line to control movement the valve member from a first position, where the member is open and a through bore is created between the inlet and outlet of the assembly, to a second position, where the valve seals the throughbore and, finally, back to the first position. |
