Remotely operated isolation valve

A method of operating an isolation valve in a wellbore, comprising:

• deploying a work string into the wellbore through a tubular string disposed in the wellbore, wherein:
• the work string comprises a deployment string, a shifting tool, and a bottomhole assembly (BHA), and
• the tubular string comprises the isolation valve and an actuator;
• and
• operating the actuator using the shifting tool, thereby opening or closing the isolation valve,
• wherein:
• the isolation valve isolates a formation from an upper portion of the wellbore in the closed position, and
• interaction between the shifting tool and the actuator provides an indication detectable at surface in response to the opening or closing of the isolation valve.

A method of operating an isolation valve in a wellbore, comprising:

• deploying a work string into the wellbore through a tubular string disposed in the wellbore, wherein:
• the work string comprises a deployment string, a shifting tool, and a bottomhole assembly (BHA), and
• the tubular string comprises the isolation valve and first and second actuators;
• and
• operating the first actuator using the shifting tool, thereby opening the isolation valve;
• and
• operating the second actuator using the shifting tool, thereby closing the isolation valve and isolating a formation from an upper portion of the wellbore.

An isolation assembly for use in a wellbore, comprising:

• an isolation valve operable between an open and a closed position;
• an opener power sub having an opener profile for receiving a driver of a shifting tool and operable to open the isolation valve in response to being driven by the shifting tool;
• and
• a closer power sub having a closer profile for receiving the driver and operable to close the isolation valve in response to being driven by the shifting tool.

A power sub for use in a wellbore, comprising:

• a tubular housing having a bore formed therethrough;
• a tubular mandrel disposed in the housing, movable relative thereto, and having a profile formed through a wall thereof for receiving a driver of a shifting tool;
• a first piston operably coupled to the mandrel and operable to pump hydraulic fluid to an outlet of the housing;
• and
• a release operable to receive a release of the shifting tool after operation of the power sub, thereby depressurizing the shifting tool.

A power sub for use in a wellbore, comprising:

• a tubular housing having a bore formed therethrough;
• a tubular mandrel disposed in the housing and rotatable relative thereto;
• and
• a piston operably coupled to the mandrel such that rotation of the mandrel longitudinally reciprocates the piston relative thereto, thereby pumping hydraulic fluid to an outlet of the housing.

A shifting tool for use in a wellbore, comprising:

• a tubular housing having a bore formed therethrough and a pocket formed in a wall thereof;
• a tubular mandrel disposed in the housing and longitudinally movable relative thereto;
• a seat longitudinally connected to the mandrel and radially movable relative thereto between an engaged position for receiving a blocking member and a disengaged position for releasing the blocking member;
• an arm pivoted to the housing, moveable relative to the housing between an extended position, a released position, and a retracted position, and disposed in the pocket in the retracted position;
• and
• a cam operably connecting the arm and the mandrel,
• wherein:
• the arm is movable from the retracted position to the extended position in response to movement of the mandrel relative to the housing,
• the arm is further movable from the extended position to the released position in response to further movement of the mandrel relative to the housing, and
• the seat is operable to move to the disengaged position when the arm is in the released position.