Downhole latch
US6978830B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 28, 2003 |
| Grant date | Dec 27, 2005 |
| Priority date | — |
| Expiry date | Feb 25, 2024 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/385
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A progressive cavity pump pumps liquid downhole to a lower formation past a packer set in a casing of a wellbore. The rotor of the pump is axially restrained by a bearing assembly spaced below the pump for controlling uphole reactive loading on the rotor. Preferably the rotor is releasably coupled to the bearing assembly for release and recovery of the rotor from the bearing assembly. Such a releasable coupling is a latch comprising a plunger telescopically and releasably coupled with a housing using a dog and track arrangement, the dog and track utilizing the telescoping action to actuate the coupling and releasing of the latch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.