External refacing indicator for a tool joint
US6896300B2 · kind B2 · utility
1Cited by
14References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 12, 2002 |
| Grant date | May 24, 2005 |
| Priority date | — |
| Expiry date | Dec 25, 2022 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B17/042
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Makeup plates on the abutting surfaces of a tool joint pin and a tool joint box are provided. The makeup plates are recessed in a short distance from the outer diameter of the tool joint elements, such that when the joint is made up, the makeup plate develops an easily visible gap between the tool elements. In this way, a quick determination may be made, without measurement, as to whether the joint can be refaced, or require re-machining.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.