Abstract: A downhole flow control device and associated method, wherein the downhole flow device is configured for use with a tubing string, the downhole flow device including a flow path configured to permit flow between external and internal locations of a tubing string; a barrier member configured to selectively vary the flow path; and a receiver configured to receive a control signal to permit control of the barrier member. Beneficially, the downhole flow device may be at least partially operable by fluid or fluid pressure from the tubing string or wellbore. Corresponding fracking valve assemblies, completion assemblies, inflow control device and hydraulic distribution modules may be provided.

Abstract: A turbine has a flow pathway with an inlet in communication with the fluid channel. A rotor is disposed in the flow pathway and is rotatable around a rotation axis under the action of fluid flowing along the flow pathway. The rotation axis of the rotor is oblique to an axis extending along the fluid channel. The outlet of flow pathway may return fluid to the fluid channel. The turbine may also be provided with a flow control arrangement so as to vary the flow of fluid past the rotor and to prevent the rotor from damage. The rotor may be positioned apart from the fluid channel and so as not to obstruct the fluid channel.

Abstract: A turbine for use in extracting energy from fluid flowing along a fluid channel defines a portion of the fluid channel and includes a flow pathway in communication with the fluid channel. A moveable element, such as a rotor, is disposed around the fluid channel and is moveable under the action of fluid flowing along the flow pathway so as to extract energy therefrom. The turbine may be associated with other apparatus in the fluid system, and may be capable of storing extracted energy for later use.

Abstract: A turbine has a flow pathway with an inlet in communication with the fluid channel. A rotor is disposed in the flow pathway and is rotatable around a rotation axis under the action of fluid flowing along the flow pathway. The rotation axis of the rotor is oblique to an axis extending along the fluid channel. The outlet of flow pathway may return fluid to the fluid channel. The turbine may also be provided with a flow control arrangement so as to vary the flow of fluid past the rotor and to prevent the rotor from damage. The rotor may be positioned apart from the fluid channel and so as not to obstruct the fluid channel.