INJECTION VALVE

摘要

A tubing mounted injection valve for an injection well is described. In one embodiment, the orifice in the flow tube is removably mounted so that it can be retrieved from the surface with a wireline rig or other surface equipment. In another embodiment, the flow tube has a surface treatment internally which creates the necessary turbulence to overcome the resistance of a return spring while at the same time providing larger clearance for passing tools therethrough for further operations downhole below the injection valve body.