Polycentric reamer
US5372209A · kind A · utility
28Cited by
5References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 8, 1993 |
| Grant date | Dec 13, 1994 |
| Priority date | — |
| Expiry date | Jun 8, 2013 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/28
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A polycentric reamer having a body thrust unit and reaming unit is especially useful for locally reaming a borehole beneath a casing string. By asymmetrically positioning a reaming unit within a body formed from non-coaxial mated cylinders, superior results are achieved. These results include minimizing wear on the casing string.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.