Apparatus for use in enlarging a borehole
US6929078B1 · kind B1 · utility
19Cited by
15References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 21, 2002 |
| Grant date | Aug 16, 2005 |
| Priority date | — |
| Expiry date | Dec 15, 2022 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A device for enlarging a bore includes an elongate body having a forward end, a rear end and an axis of rotation. The body of the device is adapted to be moved through the bore while being rotated about its axis. The device also includes a cutting blade which is attached to the body at or near its forward end, and a plurality of mixing wings. Each of the mixing wings has a unique shape, and each is attached to the body behind the cutting blade so that the axis of rotation of the body is within the plane spanned by the mixing wing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.