Connection for percussion drilling
US12241313B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 2019 |
| Grant date | Mar 4, 2025 |
| Priority date | — |
| Expiry date | Nov 24, 2041 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B1/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A connection for use in percussion drilling includes a male coupling and a female coupling. Each coupling includes a body and a respective screw thread formed on a respective inner or outer surface of the respective body. Each thread has a thread-form including a crest, a root, a contact flank and a non-contact flank. Each thread-form has a contact flank angle and a non-contact flank angle inclined relative to a respective baseline located at a respective minor or major diameter thereof. Each non-contact flank angle is greater than the respective contact flank angle. The crest of each thread-form is inclined from the respective contact flank to the respective non-contact flank such that an apex of the respective thread-form defining a respective minor or major diameter thereof is located adjacent to the respective non-contact flank.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.