Thermal compensating tubing anchor for a pumpjack well
US10053936B2 · kind B2 · utility
4Cited by
9References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 7, 2015 |
| Grant date | Aug 21, 2018 |
| Priority date | — |
| Expiry date | Sep 11, 2036 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/127
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Apparatus and method for limiting the expansion and contraction of a production tubular within a pumpjack oil well includes an anchor having a hydraulic dampening chamber and an expansion joint. A piston is attached to the tubular and position within the hydraulic dampening chamber so that axial expansion and contraction of the tubular caused by thermal and loading forces is resisted by the constrained movement of the piston within the hydraulic chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.