Stinger for Actuating Surface-Controlled Subsurface Safety Valve

A stinger for actuating a downhole tool using pressure communicated via at least one control line, the downhole tool disposed with tubing, the control line running through the tubing, the downhole tool having a tool bore for passage of tubing flow therethrough, the tool having a first key exposed in the tool bore, the stinger comprising:

• a body configured to insert at least partially into the tool bore of the downhole tool, the body defining a body bore for passage of the tubing flow therethrough, the body defining a piston chamber therein in communication with the at least one control line,
• a piston disposed in the piston chamber and being movable therein in response to the pressure;
• and
• a second key connected to the piston and being exposed on the body, the second key being engageable with the first key and being moved with the piston between first and second positions.

A method for use in tubing having tubing flow, the method comprising:

• installing a tool downhole with respect to the tubing, the tool having a tool bore for communicating the tubing flow;
• connecting a stinger to at least one control line;
• running the stinger downhole in the tubing to the tool;
• inserting the stinger at least partially in the tool bore;
• engaging a second key on the stinger with a first key exposed in the tool bore;
• moving the second key connected to a piston in a piston chamber of the stinger by communicating pressure in the at least one flow line relative to the piston chamber;
• and
• mechanically operating a function of the tool from at least a first state to a second state by moving the first key of the tool from at least a first position to a second position using the second key of the piston.