Drill string member
US7174958B2 · kind B2 · utility
1Cited by
25References
19Claims
0Family size
Inventor
Key dates
| Filing date | Feb 20, 2003 |
| Grant date | Feb 13, 2007 |
| Priority date | — |
| Expiry date | Feb 20, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S138/11
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A drill-string member includes at least one grooved portion on an outer surface thereof. A pair of axially spaced-apart grooved portions are typically provided, with two such pairs axially spaced along the longitudinal length of the member. A plurality of grooves are milled into the grooved portions, and the grooves intersect with one another to form a criss-cross pattern. As the member is rotated, fluid flows up the grooves, where fluid from one groove meets fluid from another groove at each intersection, causing turbulence to be created.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.