Abstract: A sliding sleeve design for downhole components is provided. The sliding sleeve can be used in gas lift systems.

Abstract: Electric gas lift valves and systems including a gas lift valve. The gas lift valve may comprise an integrated back check valve and choke valve. The integrated back check valve and choke valve may be retrievable. The gas lift valve may comprise an actuator. The gas lift valve may comprise a fail-closed mechanism comprising a power spring and an electro-magnet that powers a disconnect clutch. The fail-closed mechanism may be configured to close the choke valve in response to a loss of a functionality of the actuator. The gas lift valve may comprise a needle valve that is configured to place the choke valve to vary in an inflow rate. The choke valve may be modular.

Abstract: An electric gas lift valve may comprise a casing, gas lift mandrel, one or more annulus, a tubing, a venturi sleeve, a needle, a governor, anti-rotational key, a rotational (rotating) bellow, a gearbox housing that houses a gearbox, an electrical motor, and an encoder. The bellow therefore allows the electrical motor, encoder and gearbox to be hermetically sealed against the external environment. Bellows that absorb torsion are provided. A bellow configured to absorb torsion comprising: a plurality of convolutions bent following a circular trajectory such that a start edge of a first convolution of the plurality of convolutions coincides with a finish edge of a last convolution of the plurality of convolutions, the start edge of the first convolution coupled to the finish edge of the last convolution.