Polymer liners in rod pumping wells
USRE36362E · kind E · reissue
41Cited by
12References
20Claims
0Family size
Inventor
Key dates
| Filing date | Apr 29, 1998 |
| Grant date | Nov 2, 1999 |
| Priority date | — |
| Expiry date | Apr 29, 2018 |
Classification
- Technology area (CPC —)General
Abstract
The installation of an abrasion resistent polymer liner in the production tubing string of a well which is being produced by rod pumping for the principal purpose of reducing rod wear on the tubing string, and wear on the rods and/or the rod couplings. In a preferred embodiment of the invention, the polymer liner is characterized by an extruded polymer material having a high density, which is abrasive resistant, and which has a coefficient of friction that is much lower than the coefficient of friction of metal tubing, such as high density polyethylene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.