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R & C Machine Devon Ltd. Patents |
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Assignee: R & C Machine Devon Ltd.
Address: Edmonton, CA
No. of patents: 1
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 4237980 |
Check valve for fluid-producing wells |
December 9, 1980 |
| A check valve is provided for use in the tubing string of a fluid producing well. The check valve is removably seated within the restricted diameter of a seating nipple in the tubing string. Resilient holddown means at the base of the valve are provided for this purpose. The check valve |
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