A flow control system for a well includes a primary safety valve and a secondary safety valve disposable within a valve body of the primary safety valve. The secondary safety valve may include a control line port for receiving control fluid pressure from the same control line as the primary safety valve. A choke in fluid communication with the control line port delays a closing of the secondary safety valve relative to a closing of the primary safety valve in response to a decrease in the control fluid pressure.

A valve including a housing having an inlet and an outlet, a piston disposed in the housing, the piston having a first end and a second end, the piston movable between a position blocking fluid flow between the inlet and the outlet and a position allowing fluid flow between the inlet and the outlet, a pressure balance pathway through the housing porting the same pressure to both first and second ends of the piston, an actuator responsive to applied pressure on the valve, the actuator attached to the piston and a biasing arrangement configured to bias the actuator toward a closed position of the valve. A method for injecting a sequestration fluid including maintaining the fluid at a supercritical phase upstream of a valve, opening the valve by increasing pressure of the fluid, delaying phase change of the fluid from supercritical to gas.

A valve including a housing having an inlet and an outlet, a piston disposed in the housing, the piston having a first end and a second end, the piston movable between a position blocking fluid flow between the inlet and the outlet and a position allowing fluid flow between the inlet and the outlet, a pressure balance pathway through the housing porting the same pressure to both first and second ends of the piston, an actuator responsive to applied pressure on the valve, the actuator attached to the piston and a biasing arrangement configured to bias the actuator toward a closed position of the valve. A method for injecting a sequestration fluid including maintaining the fluid at a supercritical phase upstream of a valve, opening the valve by increasing pressure of the fluid, delaying phase change of the fluid from supercritical to gas.

Systems and methods for harvesting geothermal energy use temperature-based flow control to optimize the extraction of thermal energy from a geothermal reservoir. In one example, a thermal transport fluid is flowed into a wellbore traversing a thermal reservoir of a formation. Flow of the thermal transport fluid into and out of the thermal reservoir is dynamically controlled at each of a plurality of injection and/or return locations in response to a downhole parameter such as temperature. For example, flow may be controlled so that the flow into the thermal reservoir is greater at the injection locations where the temperature is hotter and that the flow out of the thermal reservoir is greater at the return locations where the temperature is hotter. The thermal transport fluid produced from the return locations is then conveyed to surface to extra the thermal energy.

Systems and methods for harvesting geothermal energy use temperature-based flow control to optimize the extraction of thermal energy from a geothermal reservoir. In one example, a thermal transport fluid is flowed into a wellbore traversing a thermal reservoir of a formation. Flow of the thermal transport fluid into and out of the thermal reservoir is dynamically controlled at each of a plurality of injection and/or return locations in response to a downhole parameter such as temperature. For example, flow may be controlled so that the flow into the thermal reservoir is greater at the injection locations where the temperature is hotter and that the flow out of the thermal reservoir is greater at the return locations where the temperature is hotter. The thermal transport fluid produced from the return locations is then conveyed to surface to extra the thermal energy.

A retrievable seal guide (RSG) for installing a seal stem in a polished bore receptacle. The RSG has an outer grapple. Inside the grapple is a mandrel. At the end of the RSG is a bullet nose guide. The mandrel is spring loaded with a spring placed under the grapple Near the rear end of the guide is a plug with an o-ring. Note that the bullet nose has an opening formed in it. A channel is also formed down the length of the device. Note too that for tight formations of non-perforated liners the plug can be replaced with a stainless-steel ball that acts as a check valve. As the RSG is pulled out, the guide is pulled back, which compresses the spring forcing the mandrel back until a cam clears the collapsible fingers on the grapple, which allows the RSG to be withdrawn.

A system for setting a wellhead pressure after a through tubing bridge plug is installed in a wellbore includes a slickline unit, a static bottomhole pressure gauge, and a pressure setting unit. The slickline unit includes the static bottomhole pressure gauge. The static bottomhole pressure gauge includes internal memory that stores a measured bottomhole pressure. The pressure setting unit sets a wellhead pressure based on the measured bottomhole pressure stored in the internal memory of the static bottomhole pressure gauge. A related method includes installing a through tubing bridge plug in a wellbore, deploying a slickline unit into the wellbore, wherein the slickline unit includes a pressure gauge, measuring bottomhole pressure with the pressure gauge, and setting a wellhead pressure based on the measured bottomhole pressure.

A system for setting a wellhead pressure after a through tubing bridge plug is installed in a wellbore includes a slickline unit, a static bottomhole pressure gauge, and a pressure setting unit. The slickline unit includes the static bottomhole pressure gauge. The static bottomhole pressure gauge includes internal memory that stores a measured bottomhole pressure. The pressure setting unit sets a wellhead pressure based on the measured bottomhole pressure stored in the internal memory of the static bottomhole pressure gauge. A related method includes installing a through tubing bridge plug in a wellbore, deploying a slickline unit into the wellbore, wherein the slickline unit includes a pressure gauge, measuring bottomhole pressure with the pressure gauge, and setting a wellhead pressure based on the measured bottomhole pressure.

A pump system includes a pump barrel disposed within a housing. A standing valve is disposed at a first end of a pump chamber defined within the pump barrel. A traveling valve is disposed at a second end of the pump chamber. The traveling valve is movable relative to along an axial axis and relative to the housing. A motor stator is disposed inside the housing. produces a rotating electromagnetic field upon receiving electrical power. A motor rotor is rotatably supported within the motor stator and rotates about the axial axis in response to the rotating electromagnetic field. A traveling plug is coupled to the valve body of the traveling body and arranged to move linearly along the axial axis in response to rotation of the motor rotor. The pump system can be disposed in a wellbore to lift fluids up a tubing in the wellbore.

A pump system includes a pump barrel disposed within a housing. A standing valve is disposed at a first end of a pump chamber defined within the pump barrel. A traveling valve is disposed at a second end of the pump chamber. The traveling valve is movable relative to along an axial axis and relative to the housing. A motor stator is disposed inside the housing. produces a rotating electromagnetic field upon receiving electrical power. A motor rotor is rotatably supported within the motor stator and rotates about the axial axis in response to the rotating electromagnetic field. A traveling plug is coupled to the valve body of the traveling body and arranged to move linearly along the axial axis in response to rotation of the motor rotor. The pump system can be disposed in a wellbore to lift fluids up a tubing in the wellbore.