Liner hanger system and method with non-pressure sensitive actuation
US12305466B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 18, 2021 |
| Grant date | May 20, 2025 |
| Priority date | — |
| Expiry date | Apr 13, 2042 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B23/0413
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A technique facilitates reducing or eliminating the risk of premature actuation of a liner hanger system and/or premature release of a miming tool. According to an embodiment, the technique utilizes a running string for deploying a liner hanger assembly having a liner hanger which may be actuated at a desired location to suspend a liner/casing from a surrounding casing string. An anti-preset module may be used in cooperation with the liner hanger to prevent premature actuation of the liner hanger. By way of example, the anti-preset module may use pressure equalization between a region within the miming string and a region between the miming string and the liner hanger to prevent pressure imbalances which could actuate the liner hanger. Additionally, a locking mechanism, e.g. releasable lock dogs, may be used to temporarily lock the liner hanger against premature actuation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.