Wellhead hydraulic drive unit

Details Wellhead hydraulic drive unit Wellhead hydraulic drive unit

F - Mech Eng,Light,Heat,Weapons

04

B

F04B 47/04 (2006.01) E21B 33/03 (2006.01)

Patent

CA 2415446

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.

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