Tapered cutting tool for reaming tubular members in well bore
US5086838A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 21, 1991 |
| Grant date | Feb 11, 1992 |
| Priority date | — |
| Expiry date | Mar 21, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T408/78
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A cutting tool (20) has a tool body (26) positioned within a metal casing (12) for reaming the inner peripheral surface of the casing (12) to a uniform smooth inner diameter. Tool body (26) has a lower end body portion (28), a generally cylindrical intermediate body portion (30), and a reduced diameter upper end body portion (22) connected to intermediate body portion (26) by a sloping shoulder (24). Blades (46, 48) have a single column of cutting elements (50) secured thereto in end to end relation to define an outwardly sloping lower column section (51A) along lower end body section (28), a vertical intermediate column section (51B) along intermediate body portion (30) and an inwardly sloping upper column section (51C) along sloping shoulder (34).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.