Method for improved well control with a downhole device
US8151904B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2007 |
| Grant date | Apr 10, 2012 |
| Priority date | — |
| Expiry date | Dec 1, 2027 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B34/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A drilling system includes a downhole well control device that can be used to control out-of-norm wellbore conditions. The downhole well control device can control one or more selected fluid parameters. The well control device in cooperation or independent of surface devices exerts control over one or more drilling or formation parameters to manage an out-of-norm wellbore condition. An exemplary well control device hydraulically isolates one or more sections of a wellbore by selectively blocking fluid flow in a pipe bore and an annulus. The control device also selectively flows fluid from the pipe bore to the annulus. A communication device provides on-way or bidirectional signal and/or data transfer between the controller(s), surface personnel and the well control device. Exemplary application of the well control device include controlling a well kick, controlling drilling fluid being lost to the formation and controlling a simultaneous kick and loss.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.