Electrical surface activated downhole circulating sub
AssigneeHalliburton Energy Services, Inc.
InventorsJames W. Estep, Albert Odell, Harold D. Johnson
Life of this patent
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Abstract
A preferred novel circulating sub includes an electric motor, hydraulic intensifier, connecting rod, valve sleeve, valve plug, and angled nozzles. Upon activation of the circulating sub the electric motor drives the valve sleeve over the valve plug, causing a flow of drilling fluid to exit the angled nozzles. Upon deactivation of the circulating sub, the electric motor removes the valve sleeve from the valve plug, allowing the flow of drilling fluid to once again flow to the drill bit. Because the electric motor is reversible, the circulating sub can be repeatedly activated and deactivated.
Claims17
A circulation sub suitable to direct a flow of fluid, said circulation sub comprising:
- an electric motor;
- a housing;
- a valve poppet being associated with said electric motor such that application of force by said electric motor directly to said valve poppet moves said valve poppet from a first position to a second position with respect to said housing;
- wherein said flow of fluid through said circulation sub travels a first route when said valve poppet is in said first position and travels a second route when said valve poppet is in said second position.
A circulating sub comprising:
- means for directing a flow of drilling fluid from a first path to a second path;
- and
- electric motor means for directly driving said means for directing said flow of drilling fluid.
A circulation sub suitable to direct a flow of fluid through a housing, said fluid being under pressure, said circulation sub comprising:
- an electric motor;
- a valve poppet being associated with said electric motor such that application of force by said electric motor to said valve poppet moves said valve poppet from a first position to a second position with respect to said housing;
- wherein said flow of fluid through said circulation sub travels a first route when said valve poppet is in said first position and travels a second route when said valve poppet is in said second position and wherein said valve poppet is not actuated by function of said pressure.
A circulating sub comprising:
- means for directing a flow of drilling fluid from a first path to a second path, said drilling fluid being under pressure;
- means for driving said means for directing said flow of drilling fluid;
- wherein said means for directing said flow of drilling fluid is not actuated by function of said pressure.
Dependencies are inferred from the claim text.