Apparatus and methods for releasing drilling rig and blowout preventer (BOP) prior to cement bonding
US9187976B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 16, 2012 |
| Grant date | Nov 17, 2015 |
| Priority date | — |
| Expiry date | Oct 24, 2033 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/261
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Apparatus and methods for managing cementing operations are provided. An example method includes connecting a cementing adapter atop a casing head itself positioned atop a surface casing landed within a conductor pipe, connecting a drilling adapter atop the cementing adapter, connecting a blowout preventer to the drilling adapter, and drilling for and running production casing. The method also includes positioning a casing hanger at least partially within a bore of the cementing adapter to be immobilized therein to retain back pressure of cement within an annulus located between the production casing and the surface casing, cementing the production casing within the surface casing, and removing the drilling adapter and blowout preventer after running the cement, but typically prior to cement bonding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.