Method and apparatus for coupling wireline tools to coil tubing
US4877089A · kind A · utility
21Cited by
13References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 18, 1987 |
| Grant date | Oct 31, 1989 |
| Priority date | — |
| Expiry date | Jun 18, 2007 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/017
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Apparatus for coupling wireline tools to coil tubing wherein a pull-out, disconnect, is provided. The pull-out consists of two tubular members with flared, bell-shaped portions, one such portion being coaxially disposed within the other. A ferrule applies pressure to the interface of the surfaces of said flared portions. Sufficient tension on the coil tubing pulls the flared portion of the interior member through the neck and out of the exterior member. Pilot valves prevent intrusion of bore hole fluid into the coupling device during logging and into the coil tubing if a pull-out has been effected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.