Anchoring device for well tools
US4018275A · kind A · utility
Inventor
Key dates
| Filing date | May 12, 1976 |
| Grant date | Apr 19, 1977 |
| Priority date | — |
| Expiry date | May 12, 1996 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B23/02
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An improved anchoring device for well tools including installing and actuating apparatus for providing visual indication at the ground surface verifying proper latching and locking of the device in a casing string. The anchoring device includes a tubular housing assembly, a packer cup assembly secured to the lower portion of the housing assembly, an expansion sleeve slidably disposed within the housing assembly for forcing latching dogs radially outwardly from the housing assembly to engage an annular recess in the casing string, a setting sleeve longitudinally slidably disposed within the housing assembly telescopically related to the expansion sleeve and a lock sleeve releasably secured to the setting sleeve and telescopically related to the expansion sleeve. Three sets of cam-actuated dogs carried by the expansion sleeve react to the relative longitudinal displacement between the expansion sleeve, setting sleeve and lock sleeve to transfer upward force applied by a wire line to latch the anchoring device in the casing string, lock the device in the latched position and actuate the installing and actuating tool to positively indicate whether or not the anchoring device has been p…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.