Release tool
US12371959B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 1, 2023 |
| Grant date | Jul 29, 2025 |
| Priority date | — |
| Expiry date | Oct 16, 2043 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/017
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A release tool for connecting a workstring to a toolstring. The release tool will be used for contingency if the toolstring gets stuck downhole and hopefully rarely would be actuated. In the present disclosure, the release tool is not broken or destroyed, but is simply disconnected into two parts using the propellent of a low explosive combustion element. This element produces gasses that drive the disconnecting process. The gasses are directed to press a tubular piston to translate from a first position where a wedging portion of the tubular piston is inside a lock ring bracing the lock ring in a locking configuration to a second position where the wedging portion is out of contact with the lock ring. The lock ring is then able to slip free from one or more locking grooves releasing the upper portion of the release tool from the lower.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.