A tubing drain with a reusable body and a replaceable sacrificial burst element, the tubing drain comprising an annular body with a window and first and second connector ends, each connector end connectable to an end of tubing sections in a tubing string. The tubing drain also has an inner body insertable into the annular body, the inner body providing the replaceable sacrificial burst element. A burst profile in the inner body aligns with the window in the annular body and provides a burst element which may be configured to burst when a target pressure differential occurs across the burst profile, thereby draining fluids from the tubing string into the casing string.

The disclosure presents processes to improve the calibration of adjustable choke valves corresponding to a specific size of positive choke bean. Typically, manufacturers specify a position of the adjustable choke valve that corresponds to a specific choke bean size. Hydrocarbon fluid conditions and composition vary and subterranean formation characteristics vary which can lead to errors in the calibration. By comparing flow rate parameters of the hydrocarbon fluid flowing through the adjustable choke manifold and the positive choke manifold, errors in calibration can be detected and corrected. The factors involved with the hydrocarbon fluid and the error correction can be used to update a choke model. The choke model can then be used for future calibrations of the adjustable choke valve.

The disclosure presents processes to improve the calibration of adjustable choke valves corresponding to a specific size of positive choke bean. Typically, manufacturers specify a position of the adjustable choke valve that corresponds to a specific choke bean size. Hydrocarbon fluid conditions and composition vary and subterranean formation characteristics vary which can lead to errors in the calibration. By comparing flow rate parameters of the hydrocarbon fluid flowing through the adjustable choke manifold and the positive choke manifold, errors in calibration can be detected and corrected. The factors involved with the hydrocarbon fluid and the error correction can be used to update a choke model. The choke model can then be used for future calibrations of the adjustable choke valve.

A downhole tool comprises a mechanical energy storage component that retains energy supplied by a first pressure increase and transfers such energy to actuate another component of the tool. In one aspect, the tool is a toe valve that is activated for opening ports thereon upon application of a first pressure and actuated to open the ports upon application of a second pressure lower than the first pressure.

A jarring tool includes a spring and a hydraulic piston cylinder arrangement for controlling the release of a mandrel to initiate a jarring force. The tool includes an adjustment mechanism for adjusting the minimum amount of an upward pulling force required to release the mandrel. The adjustment mechanism includes an axially adjustable trigger sleeve that cooperates with a dog clutch surrounding the mandrel.

A jarring tool includes a spring and a hydraulic piston cylinder arrangement for controlling the release of a mandrel to initiate a jarring force. The tool includes an adjustment mechanism for adjusting the minimum amount of an upward pulling force required to release the mandrel. The adjustment mechanism includes an axially adjustable trigger sleeve that cooperates with a dog clutch surrounding the mandrel.

An annulus safety valve assembly for controlling gas flow in a wellbore annulus that includes a passage, a check valve in the passage, and an actuator that is selectively changed between first and second states. The actuator is bi-stable, and requires no energy to remain in either state. When the actuator is put into one of the states, the check valve configuration is changed from one way flow to two way flow. Reconfiguring the check valve into the two way flow configuration vents lift gas from inside the annulus that is below the check valve.

An annulus safety valve assembly for controlling gas flow in a wellbore annulus that includes a passage, a check valve in the passage, and an actuator that is selectively changed between first and second states. The actuator is bi-stable, and requires no energy to remain in either state. When the actuator is put into one of the states, the check valve configuration is changed from one way flow to two way flow. Reconfiguring the check valve into the two way flow configuration vents lift gas from inside the annulus that is below the check valve.

Provided, in one aspect, is a fluid flow device. The fluid flow device, in one aspect, includes a housing having at least one fluid inlet and at least one fluid outlet, and a sleeve positioned within the housing. The fluid flow device according to this aspect additionally include a fluid flow member positioned within the sleeve, wherein the sleeve and fluid flow member are movable with respect to one another to define a first overlap distance and a first fluid flow path length when the housing encounters a first fluid flow pressure, and a second greater overlap distance and a second greater fluid flow path length when the housing encounters a second greater fluid flow pressure, the first fluid flow path length and the second greater fluid flow path length configured to provide a constant flow of the fluid out of the at least one fluid outlet.

Provided, in one aspect, is a fluid flow device. The fluid flow device, in one aspect, includes a housing having at least one fluid inlet and at least one fluid outlet, and a sleeve positioned within the housing. The fluid flow device according to this aspect additionally include a fluid flow member positioned within the sleeve, wherein the sleeve and fluid flow member are movable with respect to one another to define a first overlap distance and a first fluid flow path length when the housing encounters a first fluid flow pressure, and a second greater overlap distance and a second greater fluid flow path length when the housing encounters a second greater fluid flow pressure, the first fluid flow path length and the second greater fluid flow path length configured to provide a constant flow of the fluid out of the at least one fluid outlet.