Pulling tool apparatus
US4113236A · kind A · utility
15Cited by
2References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 23, 1976 |
| Grant date | Sep 12, 1978 |
| Priority date | — |
| Expiry date | Aug 23, 1996 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B23/001
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A pulling tool apparatus for assisting equipment to descend down a wellbore, such as logging tools being lowered into a deviated wellbore. The pulling tool includes a pump located in the tool housing for pulling drilling mud into the lower end of the pulling tool and discharging the drilling mud in an upward direction so as to provide a downward force on the logging tool and logging cables. Several pulling tools can be used at the same time, each being spaced at intervals along the logging cable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.