Stuffing box for progressing cavity pump drive

Details Stuffing box for progressing cavity pump drive Stuffing box for progressing cavity pump drive

E - Fixed Constructions

21

B

E21B 33/08 (2006.01) E21B 43/12 (2006.01)

Patent

CA 2711206

Progressive cavity (PC) pump drive heads require a stuffing box to seal crude oil from leaking onto the ground where the polish rod passes from the crude oil passage in the wellhead to the drive head. Using a pressurization system for the stuffing box, such that the pressure output exceeds the pressure at the wellhead, stuffing box seal life can be extended. Pressurization fluids are introduced between a primary rotary well fluid seal and a pressurization rotary seal. Any leakage of pressurization fluids from the pressurization rotary seal can be directed through a leak passage from the stuffing box or re-circulated through the leak passage to a source of pressurization fluid.

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