DOWNHOLE TOOL WITH C-RING CLOSURE SEAT

摘要

A downhole tool (100) includes a closure seat (116, 176) for seating with a closure, such as a, ball. Shear pins or other connectors temporarily limit axia movement of the closure seat which is initially housed within a restricte diameter portion of the central throughbore in the tool body. The closure sea may be lowered to engage a stop (108, 157), thereby positioning the seat withi an enlarged diameter bore portion of the tool and allowing radial expansion of closure seat to release the ball.