SHUT-IN TOOL

摘要

A wireline tool (2) is designed to be landed in a ported landing nipple (10) and locked therein by means of a locking mandrel (34). When so positioned, the tool can be cycled between respective positions in which the well can be flowed, the reservoir shut-in, or the tool run out of the well, by controlled application of tension to the wireline (6). The tool comprises a mandrel core which passes through the locking mandrel (34). A lower portion (44) of the core is guided in rotation by means of the engagement of pins (60) inwardly projecting from the locking mandrel and engaging with a jay slot assembly machined on the outer surface of the core. A bore extends through the mandrel core so that reservoir pressure is applied to a pressure gauge mounted in a socket on the tool at least when the tool is in the shut-in position.