Load detection and indicator apparatus for well tubing or the like
US4793410A · kind A · utility
2Cited by
4References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 13, 1988 |
| Grant date | Dec 27, 1988 |
| Priority date | — |
| Expiry date | Jun 13, 2008 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B19/22
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A load cell apparatus especially suitable for detecting and indicating loads on tubing injected into or withdrawn out of a well with an injector apparatus. The load cell apparatus is located longitudinally directly below the injector apparatus to avoid angling of the tubing as it is run into, or pulled out of, a well. Two gauges are provided to independently indicate positive and negative loads on the tubing and to facilitate determining whether the pipe has hit an obstruction in a well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.