Mechanically locking hydraulic jar and method
US11098549B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 31, 2019 |
| Grant date | Aug 24, 2021 |
| Priority date | — |
| Expiry date | Dec 31, 2039 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/12
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A mechanically locking hydraulic jar device includes an outer sleeve, an inner sleeve partially disposed in an inner bore of the outer sleeve, and a mechanical lock engaging the outer sleeve and the inner sleeve in a default position to axially secure the inner sleeve to the outer sleeve. Activation of the hydraulic jar disables the mechanical lock to allow axial movement of the inner sleeve relative to the outer sleeve, which generates an impact force when the inner sleeve reaches an activated position. The hydraulic jar device also includes an upward block and a downward block configured to limit the upward and downward axial movement, respectively, of the inner sleeve relative to the outer sleeve when the mechanical lock is disabled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.