Stabilizer for a steerable drilling system
US10711534B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 7, 2016 |
| Grant date | Jul 14, 2020 |
| Priority date | — |
| Expiry date | Dec 2, 2036 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B17/1078
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
This invention relates to a stabilizer (10) for a steerable drilling system, in particular for use in drilling directional boreholes for oil and gas extraction. There is provided a stabilizer (10) for a steerable drilling system having a first passageway (16) and a second passageway (18) at its outer surface, the passageways being helical and extending along the length of the stabilizer, the first and second passageways being oppositely-oriented, the first and second passageways intersecting one another, the stabilizer having a number of blades (22) between the passageways, the cross-sectional area of the first passageway being larger than the cross-sectional area of the second passageway. The asymmetric passageways enable the stabilizer designer to enhance the performance of the stabilizer during drilling and tripping.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.