Pressure and flow control in drilling operations
US10233708B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 3, 2015 |
| Grant date | Mar 19, 2019 |
| Priority date | — |
| Expiry date | Jun 3, 2035 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B44/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A well drilling system includes a flow control device regulating flow from a rig pump to a drill string, the flow control device being interconnected between the pump and a standpipe manifold, and another flow control device regulating flow through a line in communication with an annulus. Flow is simultaneously permitted through the flow control devices. A method of maintaining a desired bottom hole pressure includes dividing drilling fluid flow between a line in communication with a drill string interior and a line in communication with an annulus; the flow dividing step including permitting flow through a flow control device interconnected between a pump and a standpipe manifold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.