Continuous circulation system for rotational drilling
US10822908B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 17, 2018 |
| Grant date | Nov 3, 2020 |
| Priority date | — |
| Expiry date | Jan 17, 2038 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A circulation coupler for continuous or constant circulation of drilling mud during operation of a drill string, the circulation coupler comprising: a housing having an upper open end and a lower open end, wherein the housing has a port through the housing between the upper and lower ends; an upper rotating control device positioned in the upper open end of the housing, wherein the upper rotating control device comprises a bearing package and a sealing component for sealing engagement with a drill string; and a lower rotating control device position in the lower open end of the housing, wherein the upper rotating control device comprises a bearing package and a sealing component for sealing engagement with a drill string, wherein when a drill sting is positioned within the circulation coupler and engaged by the sealing components of the upper and lower rotating control devices a chamber is defined within the housing between the upper and lower rotating control devices around the drill string.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.