Welleng Science and Technology Ltd.

Stefan Neil Lewis Stewart

Peter Barnes Moyes

A valve apparatus, such as a downhole valve apparatus, includes a housing having a flow path therein and a valve member mounted within the housing and being operable between closed and open configurations to control flow along the flow path. An actuator assembly is moveable from a first position to a second position to sequentially perform first and second actuation functions, the first actuation function being associated with the operation of an auxiliary system, and the second actuation function opening the valve member from its closed configuration.

Growing community of inventors

Aberdeen, United Kingdom

Stefan Neil Lewis Stewart