Threaded coupling end for a percussion drill string component
US10627023B2 · kind B2 · utility
0Cited by
3References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 19, 2016 |
| Grant date | Apr 21, 2020 |
| Priority date | — |
| Expiry date | Jan 1, 2037 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B17/0426
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A threaded coupling for a drill string component includes a body on which is formed a thread. A reduction in stress concentrations and a resistance to bending moments are achieved at the thread by reducing a thread depth at at least one axial end of the thread and by arranging an endmost flank of a crest or root of the thread at an endmost helical turn.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.