Method and apparatus for establishing communication with a downhole portion of a control fluid pipe
US4981177A · kind A · utility
93Cited by
11References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 17, 1989 |
| Grant date | Jan 1, 1991 |
| Priority date | — |
| Expiry date | Oct 17, 2009 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B29/08
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A downhole tool, such as a safety valve or a stand-alone nipple, has a tubular housing. An axially extending bore is provided in the wall of the housing. A radially extending recess is provided in the internal bore wall of the housing, encompassing the axially extending bore, and a control fluid pipe is passed through the bore and the recess. A cutting tool is mounted for radial movements in the recess and is actuated by downward jarring forces imparted by an auxiliary tool. The control pipe is severed by the cutting element and the lower severed end portion of the control pipe is concurrently crimped to close such end portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.