E - Fixed Constructions
21
B
166/44
E21B 34/06 (2006.01) E21B 34/14 (2006.01)
Patent
CA 1133826
VALVE Abstract of the Disclosure A sleeve valve which may be made up as a part of a tubing string in which the valve member has two positions. Dogs carried by the valve member alternately cooperate with spaced grooves in the body in said positions. The dogs are alternately engageable by a shifting tool to shift the valve member in opposite directions and after the valve member has been shifted, the dogs are disengaged from the shifting tool. The valve is disclosed as a part of a testing system employ- ing a circulating tool, a cushion valve, a seal unit, and a landing nipple with a transducer fitting. This invention relates to valves. In one form, it relates to valves which may form a part of a tubing string. Preferably, the valve depends from a well packer. In many instances it is desirable to be able to shift a sleeve between open and closed position. It is also fre- quently desirable to shift the sleeve with an operating tool which after the sleeve is shifted is released so that the positioning of the shifting tool is not critical or the shifting tool may move a further distance to perform other functions or to land other equipment, or for other reasons it is desirable that the valve member be shifted and then released. In the testing of wells, it is frequently desirable to be able to selectively produce the well through the tubing. In some instances, it is desirable to provide a sleeve valve, preferably depending from a packer, with ports which may be opened and closed to provide for flow from the well through the valve. It is an object of this invention to provide a valve having a valve member shiftable between open and closed posi- tions in which the shifting tool is released from the valve member automatically upon the valve member reaching either its open or closed position. Another object is to provide a valve as in the preceding object with a shutter to protect the seals in the system which shutter is automatically operable in response to movement of the valve member. Another object is to provide a valve such as a sleeve valve with spaced dogs which are engageable by a shifting tool to move the valve member between open and closed position and in which the dogs are engaged by a shifting tool and then release the shifting tool as they move into cooperating grooves to alternately latch the valve member in open or closed posi- tion. Another object is to provide a sleeve valve with latching collets in which the collets are protected against damage during shifting of the valve member. Other objects, features and advantages of this invention will be apparent from the drawings, the specification and the claims.
350943
Otis Engineering Corporation
Smart & Biggar
LandOfFree
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