Tubing Retrievable Sub Surface Safety Valve Control Line Isolation Tool to Serve as a Downhole Barrier

Abstract

The Tubing Retrievable Sub Surface Safety Valves (TRSSSV) are commonly deployed in drilling operations as a means to shut-in a wellbore in the event the integrity of a surface wellhead is compromised during operation. However, current Tubing Retrievable Sub Surface Safety Valves commonly experience a number of failures and malfunctions due to surface leaks at the Control Line Exit block. For instance, some Tubing Retrievable Sub Surface Safety Valves may fail to function as designed when Control Line Exit block losses integrity and hydraulic pressure within the control line is lost, which may lead to uncontrolled closure of Tubing Retrievable Sub Surface Safety Valves flapper during well production or so called "Slam Closure", causing significant wear or damage of the safety valve components, which over time may result in significant Tubing Retrievable Sub Surface Safety Valves wear or failure that leads to performing costly well workover to change out the valve as well as loos in production for the duration the well is shut in. Therefore, a need existed for additional tools or methods capable of isolating the reservoir pressure and fluids from below the Tubing Retrievable Sub Surface Safety Valve to act as a downhole barrier for control line conduit, in order to perform required surface repair to the control line exit block for the duration of this operations.