Selective no-go apparatus
US4406325A · kind A · utility
7Cited by
9References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 2, 1981 |
| Grant date | Sep 27, 1983 |
| Priority date | — |
| Expiry date | Oct 2, 2001 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B23/02
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A no-go apparatus for positioning a tool within a landing nipple in a tubing string in a subterranean well includes a mandrel axially movable within the tubing string having selectively radially expandable latches for engaging a specially shaped annular groove formed on the inside cylindrical surface of the landing nipple, thereby preventing downward movement of the latches and mandrel past the groove. The latches are configured to prevent their engagement by any groove or projections in the tubing string other than the correspondingly shaped groove.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.