Anti rotational device for down hole hydraulic pumping unit
Patent
·
OSTI ID:7062638
This patent describes, for use in a down hole pumping unit operated by a sucker rod driven by a hydraulic pump having a cylinder and cylinder rod, an anti rotational device for connecting the cylinder rod to the sucker rod while permitting rotation of the sucker rod comprising: vertical spacer means connectable adjacent an upper end therof in fixed relation to the cylinder rod; means rotating the sucker rod; means connecting the sucker rod adjacent a lower end of the vertical spacer means for rotation relative thereto; and vertical guide means permitting vertical movement of the vertical spacer means while preventing rotation thereof.
- Assignee:
- NOV; EDB-87-053219; NOV-87-045555
- Patent Number(s):
- US 4637459
- OSTI ID:
- 7062638
- Country of Publication:
- United States
- Language:
- English
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