Oil country tubular goods casing coupling
US11008819B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 23, 2018 |
| Grant date | May 18, 2021 |
| Priority date | — |
| Expiry date | Oct 5, 2039 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L15/06
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A threaded coupling suitable for drilling oil and gas wells is provided. The threaded coupling having a first end and a second end. A first portion of the threaded coupling proximal to the first end can have a first thread profile, and a second portion of the threaded coupling proximal to the second end can have a second thread profile that is different from the first thread profile. In particular, at least two threads of the second thread profile proximate to the second end are reduced in height according to an extra machining angle. The first thread profile and the second thread profile can further be tapered according to a taper angle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.