Impeller arrangement
AssigneeSchlumberger Technology Corporation
InventorFrancesco Vaghi
Life of this patent
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Abstract
An impeller arrangement comprises an impeller 10 having at least one first vane surface 26 orientated such that the application of fluid under pressure thereto applies a torque to the impeller 10 in a first rotary direction, at least one second vane surface 28 orientated such that the application of fluid under pressure thereto applies a torque to the impeller 10 in a second, opposite rotary direction, and a valve 34 operable to control the supply of fluid to the first and second vane surfaces 26, 28.
Claims8
An impeller arrangement comprising an impeller having at least one first vane surface orientated such that the application of fluid under pressure thereto applies a torque to the impeller in a first rotary direction, at least one second vane surface orientated such that the application of fluid under pressure thereto applies a torque to the impeller in a second, opposite rotary direction, and a valve operable to control the supply of fluid to the first and second vane surfaces.
Dependencies are inferred from the claim text.