For gas lift, gas lift valves install on a completion in a wellbore. The gas lift valve has a pressure-sensitive valve and a check valve configured to control communication in the valve. A piston is held closed with a first connection relative to the valve's outlet exposed to tubing pressure, while the check valve is held open in the valve with a second connection. Pressure testing can be performed on the integrity of the tubing and casing by increasing the tubing and annulus pressures while the piston stays closed. The gas lift valve is then actuated for operation by increasing the tubing or annulus pressure beyond a predetermined limit of the first connection to release the piston to move open relative to the outlet. The movement of the piston releases the hold of the second connection on the check valve so the check valve can function normally as a one-way valve.

A method of intervention in a failed deep-set tubing-retrievable subsurface safety valve disposed in a deepwater or ultra-deepwater subsea well uses a deep-set wireline-retrievable subsurface safety valve that may be deployed via wireline into the failed deep-set tubing-retrievable subsurface safety valve. The deep-set wireline-retrievable subsurface safety valve has a closure actuation mechanism that is disposed below the closure device. In addition, the closure actuation mechanism includes a pressure-balanced piston that is exposed to wellbore fluids on both distal ends of the piston, thereby allowing the piston to actuate the closure device in deepwater and ultra-deepwater wells with significant hydrostatic head in the control line. Advantageously, the method does not require re-completion of the well and a light intervention vessel may be used as the platform for performing the intervention, rather than a conventional drilling rig or platform, substantially reducing non-productive down-time, lost profits, and costs associated with resuming production.

Systems and methods include a mechanical isolation device that comprises a sleeve, which includes a port for fluid flow between an internal bore of the sleeve and an inside of a tubular. A receiver positioned in the internal bore includes a first orifice at a first axial location on the receiver, and a second orifice at a second axial location on the receiver. The second orifice is either aligned or un-aligned with the port of the sleeve. The receiver is slidable within the sleeve to: (i) move the first orifice into alignment with the port and either move the second orifice out of alignment with the port or keep the second orifice out of alignment with the port; and (ii) move the first orifice out of alignment with the port so that a portion of the receiver covers the port to block fluid flow between the internal bore of the sleeve and the port.

A surface-controlled wireline-retrievable safety valve includes a seat housing having a plurality of flow ports that is configured to house a hard seat. A closure device has a plurality of equalization ports, is disposed within the seat housing, and is configured to controllably move off the hard seat and expose the plurality of flow ports to a central lumen of the safety valve under hydraulic actuation. A power piston having a shoulder portion includes a top end that is attached to the closure device and the shoulder portion is disposed within a hydraulic chamber housing forming a differential area. A hydraulic actuation port may be configured to receive hydraulic actuation fluid from a surface pump. A hydraulic passage may be configured to convey the hydraulic actuation fluid from the hydraulic actuation port to the differential area via a hydraulic access port.

A valve includes a piston, a flow tube, and a coupling transferring longitudinal movement between the piston and flow tube and enabling rotational movement of the flow tube with respect to the piston. The coupling includes a connector and a thrust sleeve. The connector includes a piston attachment feature and a thrust sleeve attachment feature, the piston attachment feature attached to the piston. The thrust sleeve includes a pocket, the thrust sleeve attachment feature disposed within the pocket. The thrust sleeve includes portions disposed radially interiorly and radially exteriorly of the thrust sleeve attachment feature.

The present invention is a retrievable back pressure valve device and method of using the same that may be placed in tubing during well completion and retrieved as desired by dropping a ball down hole, which then interacts with the valve to shear the positioning points allowing for retrieval as the valve is allowed to move up the well to be removed from same.

A system and method for controlling fluid flow inside a tubular in a wellbore includes a tubular comprising an internal bore and a latch profile on an inner surface of the tubular. A receiver is positioned within the internal bore of the tubular at the latch profile so that the tubular and the receiver form a unit for insertion into the wellbore. An interior of the receiver defines a fluid flow channel, and the fluid flow channel includes an internal taper. A float valve is provided for dropping into the wellbore and the receiver. The float valve includes an external taper at an external surface of the float valve, and the external taper abuts against the internal taper of the receiver so that the float valve in the receiver blocks the fluid flow channel.

A chemical injection valve can include a valve stem reciprocably disposed relative to a primary seal, and a variable flow restrictor upstream of the primary seal relative to a direction of flow through the chemical injection valve. The variable flow restrictor restricts the flow when the valve stem is disengaged from the primary seal. A chemical injection system can include a chemical treatment pumped through a chemical injection valve and into an interior of a tubular string in a well, the chemical injection valve including a valve stem, a primary seal sealingly engaged with the valve stem in a closed position and disengaged from the valve stem in an open position, and a flow restrictor that restricts the flow of the chemical treatment downstream from the primary seal in the open position.

An annular safety valve sealing package comprises an annular safety valve comprising a tubular housing; a first annular sealing element comprising a first elastomeric material and disposed about the tubular housing of the annular safety valve; a second annular sealing element comprising a second elastomeric material and disposed about the tubular housing of the annular safety valve adjacent the first annular sealing element; and a third annular sealing element comprising a third elastomeric material and disposed about the tubular housing of the annular safety valve adjacent the second annular sealing element and on an opposite side of the second annular sealing element from the first annular sealing element. At least two of the first elastomeric material, the second elastomeric material, or the third elastomeric material have different compositions.

A production tubing pressure insensitive wireline retrievable safety valve includes an upper and a lower packing to create a hydraulic seal in an annulus surrounding a portion of the wireline retrievable safety valve and a hydraulic fluid intake port to receive hydraulic fluid in the annulus surrounding the wireline retrievable safety valve within the hydraulic seal from a surface. The hydraulic fluid is communicated to a piston shoulder chamber disposed below the hydraulic seal to move a power piston under actuation pressure and compress a power spring disposed within a gas chamber. A ball valve connected to the power piston moves a ball off seat when the power piston is forced down allowing fluid communication through a plurality of flow ports into a central lumen of the wireline retrievable safety valve exposed when the ball is off seat.