Invention Grant
- Patent Title: Surface-driven pumping system and method for recovering a fluid from a subsurface hydrocarbon deposit
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Application No.: US15600162Application Date: 2017-05-19
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Publication No.: US10428628B2Publication Date: 2019-10-01
- Inventor: Peter Theodore Markovitch , Larry Cardinal
- Applicant: Dalmatian Hunter Holdings Ltd.
- Applicant Address: CA Calgary, Alberta
- Assignee: Dalmation Hunter Holdings Ltd.
- Current Assignee: Dalmation Hunter Holdings Ltd.
- Current Assignee Address: CA Calgary, Alberta
- Agent D. Doak Home
- Main IPC: E21B43/12
- IPC: E21B43/12 ; F04D13/08 ; F04D15/00 ; F16H1/46 ; F04D13/02 ; F04D13/10 ; F04C2/107 ; F04C13/00 ; F04C15/00

Abstract:
A surface-driven fluid recovery system for recovery of hydrocarbons, having an uphole prime mover, typically an electric motor, and an uphole speed-reduction transmission to reduce speed of rotation supplied by the prime mover to a rod string to thereby reduce frictional and cyclic fatigue stresses imparted on the rod string. A downhole speed-increasing transmission is provided to increase rotational speed prior to supply of rotational energy to a downhole centrifugal or progressive cavity pump. A magnetic coupling is interposed between the prime mover and the speed reduction gearbox or between the speed reduction gearbox and the rod string, to provide damping of high transient rotational stresses between the prime mover and the rod string and/or provide a method for selectively coupling or partially coupling/decoupling the rod string to the prime mover.
Public/Granted literature
- US20180334891A1 SURFACE-DRIVEN PUMPING SYSTEM Public/Granted day:2018-11-22
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