Downhole abrading tool having a taggant injection assembly for indicating excessive wear
US7565928B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 2006 |
| Grant date | Jul 28, 2009 |
| Priority date | — |
| Expiry date | Jun 2, 2027 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B27/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A downhole abrading tools has a body with a first end for connection with a rotating component of a drill string and a cutting end for rotation in unison with the body. The downhole abrading tool also includes a passage through the tool for circulating a drilling fluid. Disposed within the drilling fluid passageway is a taggant injection assembly having one or more taggants disposed therein that facilitates injection of taggants into the drilling fluid upon the cutting end experience excessive wear. The taggants are then transported to the surface location along with the drilling fluid for detection by the operator of the downhole abrading tool.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.