Actuator module for wireline cutting safety valve

摘要

A portable add-on actuator module for use with a wireline cutting surface safety valve to provide supplemental energy for closing and simultaneously cutting a wireline extending through the surface safety valve in the event of an emergency. The unit includes a spring loaded locking collet assembly arranged to engage a locking recess within the stem of a surface safety valve so that the spring force may be added to normal valve closing forces such as line pressure and valve stem springs to supplement such forces for insuring the cutting by the surface valve member of a wireline extending through the member. The actuator module has a body which rests on the safety valve body without the use of any connecting structure. The module also includes structure for hydraulically compressing the spring for connecting the module on a safety valve and for hydraulically shifting the latching collet assembly to a disengaging condition for releasing the module from a safety valve.