Chemical injection mandrel pressure shut off device

摘要

A shut off system for a hydrocarbon recovery mandrel includes an inline valve assembly that contains a nipple that includes a chemical flow line. The chemical flow line is operative to transfer fluids from outside the wellbore to a mandrel channel; where the mandrel channel is disposed in the mandrel. A valve assembly includes a cylinder and a piston shaft; where the cylinder contacts the chemical flow line; where the piston shaft reciprocates in the cylinder in response to opposing applied pressures. The piston shaft contacts a sealing object that is operative to facilitate or to prevent fluid flow from the chemical flow line to the mandrel channel. The cylinder includes a port that provides fluid communication from the cylinder to the mandrel channel and an actuating assembly; where the actuating assembly is operative to displace the piston shaft in the cylinder to prevent fluid communication between the chemical flow line and the mandrel channel.

主权项

1. A shut off system for a hydrocarbon recovery mandrel comprising:
an inline valve assembly comprising:
a nipple comprising a chemical flow line; the chemical flow line being operative to transfer fluids from outside the wellbore to a mandrel channel; where the mandrel channel is disposed in the mandrel; anda check pad in communication with the nipple via a sleeve to form a fluid leak proof contact and where the check pad contains a passage for the chemical flow line to contact the cylinder; where the sleeve is in direct contact with the nipple and in direct contact with the check pad to form a fluid leak proof contact and where the sleeve contains a passage for the chemical flow line to contact the cylinder; a valve assembly comprising:
a cylinder and a piston shaft; where the cylinder contacts the chemical flow line;where the piston shaft reciprocates in the cylinder in response to opposing applied pressures;where the piston shaft contacts a sealing object that is operative to facilitate or to prevent fluid flow from the chemical flow line to the mandrel channel; where the cylinder comprises a port that provides fluid communication from the cylinder to the mandrel channel; and
an actuating assembly; where the actuating assembly is operative to displace the piston shaft in the cylinder to prevent fluid communication between the chemical flow line and the mandrel channel.