Method and device for carrying out interventions in wells where high temperatures prevail
US5217075A · kind A · utility
100Cited by
12References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 12, 1991 |
| Grant date | Jun 8, 1993 |
| Priority date | — |
| Expiry date | Nov 12, 2011 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/0175
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A well tool such as a measuring sonde is arranged in a protective housing and introduced into a well at the end of a tubing. A retractable latching device fastens the tool to the housing and to an electrical transmission cable. The tubing is connected with a pumping assembly capable of circulating up to the housing a cooling fluid at a temperature lower than the temperature prevailing in the well and the tool is operated by moving the tool out of the housing and by bringing the tool regularly back into the housing, which is permanently cooled by the fluid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.