Wellhead hydraulic drive unit
AssigneesInnovative Production Technologies Ltd., Sabre Machining Ltd., Ed Matthews
InventorsEd Matthews, Gregg Lacusta, Jim Anaka
Life of this patent
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Abstract
The present invention provides a wellhead hydraulic drive unit to operate various styles of downhole pumps, which is installed as an integral part of a wellhead thereby eliminating the need for a stuffing box. The wellhead hydraulic drive unit comprises a hollow hydraulic cylinder having a piston positioned therein, a hydraulic fluid supply attached to the hydraulic cylinder for raising the piston within the hydraulic cylinder, a hollow ram slideably received within the inner wall of the hydraulic cylinder and connected to the piston for reciprocation in response to the piston; and a production tube inserted through the ram for enabling well fluid to be discharged from the well.
Claims20
An in-casing wellhead hydraulic drive unit for operable connection to a downhole production pump via pump connecting means, comprising:
- (a) a hydraulic cylinder configured for placement within and in landed engagement with an uppermost portion of a wellhead casing, having top and bottom ends, an inner wall and a piston positioned within said inner wall for reciprocation within the hydraulic cylinder;
- (b) hydraulic fluid supply means coupled to the hydraulic cylinder for raising of the piston within the hydraulic cylinder;
- (c) ram means having a top and bottom end and a bore therethrough, slideably received within the inner wall of the hydraulic cylinder and operably connected to the piston for reciprocation in response to the piston;
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- (d) stationary production tube means, inserted through the bore of the ram means and connected to the hydraulic cylinder for enabling well fluid to be discharged from the well.
An in-casing wellhead hydraulic drive unit for operable connection to a downhole production pump via pump connecting means, comprising:
- (a) a hydraulic cylinder configured for placement within and landed engagement with an uppermost portion of a wellhead casing, having top and bottom ends, an inner wall and a piston positioned within said inner wall for reciprocation within the hydraulic cylinder, said piston having a plurality of passages therethrough through which hydraulic tubing extends, said hydraulic tubing adapted to pressurize an annular area below said piston so as to cause said piston to rise when said annular area is pressurized by hydraulic fluid from said hydraulic tubing;
- (b) hydraulic fluid supply means coupled to the hydraulic tubing for raising of the piston within the hydraulic cylinder;
- (c) ram means having a top and bottom end and a bore therethrough, slideably received within the inner wall of the hydraulic cylinder and operably connected to the piston for reciprocation in response to the piston;
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- (d) production tube means inserted through the bore of the ram means and connected to the hydraulic cylinder for enabling well fluid to be discharged from the well via said production tube.
Dependencies are inferred from the claim text.