Automated well pressure control and gas handling system and method
US10648315B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2016 |
| Grant date | May 12, 2020 |
| Priority date | — |
| Expiry date | Jun 29, 2036 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B17/01
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method includes pumping fluid into a drill string extending through a riser into a well. A managed pressure drilling system is operated to maintain a selected fluid pressure in the well between the well and the drill string. A fluid influx into the well or a fluid loss into a formation traversed by the well is detected using measurements of fluid pressure in the well and fluid flow into and out of the well. The method includes automatically abating the fluid influx by closing an annular blowout preventer disposed in the riser or abating the fluid loss by operating the annular blowout preventer and pumping a sacrificial fluid into the drill string.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.