Through tubing P and A with two-material plugs
US11401777B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 13, 2020 |
| Grant date | Aug 2, 2022 |
| Priority date | — |
| Expiry date | Jul 13, 2040 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/005
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Methods of plugging a hydrocarbon well by a through-tubing technique wherein the tubing is left in place, and only very short (<5 m) sections are cut, milled, perforated, ruptured and expanded, or combinations thereof. A blocking device is sent downhole if needed to block a bottom of the plug section, and resin dropped onto the blocking device to make a first plug, then cement is deployed onto said first plug to form a second plug. Therefore, the final interval is plugged with a two material binary plug. Once completed, and both primary and secondary barriers are in place, the well can be closed and the Christmas tree removed. A rock-to-rock plug can be set by removing or partially removing the tubular and the outer casing, or just inner casing/tubulars can be removed if the exterior cement and casing are of sufficient quality.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.