System and method for controlling annular well pressure
US11428069B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Apr 14, 2020 |
| Grant date | Aug 30, 2022 |
| Priority date | — |
| Expiry date | May 8, 2040 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B34/08
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A fast-acting managed pressure drilling rig is disclosed. A main valve configured as an alternative for a conventional rotating control device is provided to control drilling of a wellbore. A second valve is configured to trap pressure in the wellbore. A choke valve maintains well bottomhole pressure within specified limits by trapping pressure or by releasing trapped pressure within the wellbore. A pressure relief choke is configured to provide fine pressure stability control within the well and to act as a pressure relief valve in response to wellbore overpressure. A controller is configured with at least one processor to affect operation of the main valve, the second ratio valve, the choke valve, and the pressure relief choke in response to information received by the controller representing operation of the managed pressure drilling rig.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.