Method and apparatus for weighing a sucker-rod pumped well
US4509365A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 26, 1983 |
| Grant date | Apr 9, 1985 |
| Priority date | — |
| Expiry date | Sep 26, 2003 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B49/065
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Method and apparatus for checking a sucker-rod pumped well for defects by weighing the well. A load cell connected between the sucker-rod and a power unit develops a signal representative of the load on the sucker-rod. The sucker-rod load is checked with the rod and an associated downhole pump plunger in a stationary position. The load readings are corrected for load cell drift by a computer, and a corrected load value displayed on a digital display unit. The load readings are updated periodically and any changes in load reading can be used to determine the presence of a defect and to ascertain the type of defect in the pumping apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.