Threaded joint for oil country tubular goods
US9982815B2 · kind B2 · utility
1Cited by
8References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 29, 2014 |
| Grant date | May 29, 2018 |
| Priority date | — |
| Expiry date | Jul 1, 2035 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B17/08
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A premium threaded joint has a pin-side shoulder angle θ1, a box-side shoulder angle θ2, a seal interference quantity δ and a seal point distance xp satisfying θ2−θ1=α×δ/xp, α=7 to 14, and a pin distal end thickness tp1 defined by a difference Re−Ri between a radius Re of a pin most distal end portion and an inner radius Ri of a pin distal end portion is 0.25 times or more as large as a pin raw pipe thickness tp0.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.