Reaming tool suitable for running on casing or liner
US7621351B2 · kind B2 · utility
11Cited by
119References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 11, 2007 |
| Grant date | Nov 24, 2009 |
| Priority date | — |
| Expiry date | May 11, 2027 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B17/14
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A reaming tool includes a tubular body having a nose portion with a concave center. A plurality of blades defining junk slots therebetween extend axially behind the nose and taper outwardly from the exterior of the tubular body. Rotationally leading edges of the blades carry a plurality of cutting elements from the axially leading ends. Selected surfaces and edges of the blades bear tungsten carbide, which may comprise crushed tungsten carbide. The shell of the nose is configured to ensure drillout from the centerline thereof toward the side wall of the tubular body. A method of drilling out a reaming tool is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.