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.

A system and method for fracturing multiple zones along a length of a wellbore during a single run are provided. A single magnetic shifter device may be lowered on coiled tubing to shift open multiple sleeve assemblies set along the wellbore to expose different fracture zones for desired fracturing treatments. The sleeve assemblies may each include a magnetic sensing system designed to detect a magnetic field output from the shifter device. The magnetic sensing system may output a control signal to an electro-hydraulic lock to collapse a baffle component of the sleeve assembly. Once the baffle is collapsed, an isolation component of the shifter device may engage the collapsed baffle to form a plug through the wellbore. Pressure applied from the surface may push the baffle and a sliding sleeve of the sleeve assembly downward, thereby exposing fracturing ports through the casing of the wellbore.

A system and method for fracturing multiple zones along a length of a wellbore during a single run are provided. A single magnetic shifter device may be lowered on coiled tubing to shift open multiple sleeve assemblies set along the wellbore to expose different fracture zones for desired fracturing treatments. The sleeve assemblies may each include a magnetic sensing system designed to detect a magnetic field output from the shifter device. The magnetic sensing system may output a control signal to an electro-hydraulic lock to collapse a baffle component of the sleeve assembly. Once the baffle is collapsed, an isolation component of the shifter device may engage the collapsed baffle to form a plug through the wellbore. Pressure applied from the surface may push the baffle and a sliding sleeve of the sleeve assembly downward, thereby exposing fracturing ports through the casing of the wellbore.

A device for limiting the flow of drilling fluid through a section of drill string includes a body with a hole in the periphery. Flow enters the device through one axial end, at least a portion of the flow exits through the other axial end. Some of the fluid flow can be diverted through the peripheral hole. A spring-biased axial piston may have an approximately constant force throughout its range of travel. The piston moves axially in response to the changing fluid flow rate to enable a constant amount of flow exiting the axial end of the tool to be achieved while diverting away excess flow through the side.

The invention relates to a multistage high pressure fracturing system and tubular hydraulic valve (THV) system for connection to a completion string to enable isolation of a zone of interest within a well. In particular, the system enables access to a downhole formation for fracturing the zone of interest and for hydrocarbon production. The system generally includes a plug counting system, a plug capture system and a valve system wherein dropping a series of plugs down the completion string enables successive capture of individual plugs within individual THVs for subsequent fracturing operations.

The invention relates to a multistage high pressure fracturing system and tubular hydraulic valve (THV) system for connection to a completion string to enable isolation of a zone of interest within a well. In particular, the system enables access to a downhole formation for fracturing the zone of interest and for hydrocarbon production. The system generally includes a plug counting system, a plug capture system and a valve system wherein dropping a series of plugs down the completion string enables successive capture of individual plugs within individual THVs for subsequent fracturing operations.

A system for tracking an object in oil and gas wellbore operations wherein a releasable object carrying a first signal system is released into tube system associated with a wellbore. The first signal system communicates with one or more second signal systems positioned along the travel path of the object; along the surface of the formation; and/or throughout the wellbore. First signal system and the second signal system may communicate by RF signals. First signal system and any second signal systems positioned on the surface communicate by through-the-earth or very low frequency signals. A global positioning system may be utilized in conjunction with any second signal systems on the surface to identify the absolute location of the object in the underground wellbore. The first signal system carried by the object may be a piezoelectric system disposed to transmit a signal when the object experiences a predetermined pressure.

Injection of CO.sub.2 may be controlled and optimized, and CO.sub.2 plume leaks monitored in real time, using a controlled sleeve system deployed into a well, where the controlled sleeve system comprises a predetermined set of ports extending from an outer surface of a substantially tubular housing through to an inner annulus of the housing and one or more selectively actuated sliding sleeves configured to selectively open, occlude, and close the predetermined set of ports. One or more sensors configured to be deployed in the well may be present. A wireless remotely actuated flow controller disposed at least partially within the housing and operatively in communication with the sensor comprises a sleeve actuator controller operatively connected to the selectively actuated sliding sleeve and a sensor data acquisition module operatively in communication with the sensor. A communications module is operatively in communication with the wireless remote actuated flow controller. Power may be supplied via a power supply operatively in communication with the wireless remote actuated flow controller, the communications module, and the sensor. The controlled sleeve system is placed into communication with a surface control system disposed proximate a surface location of the well and CO.sub.2 injected into a geological formation of the well, at least partially through the controlled sleeve system. The surface system is used to selectively actuate the selectively actuated sleeve to selectively choke, occlude, and permit the flow of CO.sub.2.

Injection of CO.sub.2 may be controlled and optimized, and CO.sub.2 plume leaks monitored in real time, using a controlled sleeve system deployed into a well, where the controlled sleeve system comprises a predetermined set of ports extending from an outer surface of a substantially tubular housing through to an inner annulus of the housing and one or more selectively actuated sliding sleeves configured to selectively open, occlude, and close the predetermined set of ports. One or more sensors configured to be deployed in the well may be present. A wireless remotely actuated flow controller disposed at least partially within the housing and operatively in communication with the sensor comprises a sleeve actuator controller operatively connected to the selectively actuated sliding sleeve and a sensor data acquisition module operatively in communication with the sensor. A communications module is operatively in communication with the wireless remote actuated flow controller. Power may be supplied via a power supply operatively in communication with the wireless remote actuated flow controller, the communications module, and the sensor. The controlled sleeve system is placed into communication with a surface control system disposed proximate a surface location of the well and CO.sub.2 injected into a geological formation of the well, at least partially through the controlled sleeve system. The surface system is used to selectively actuate the selectively actuated sleeve to selectively choke, occlude, and permit the flow of CO.sub.2.