Balanced thread form, tubulars employing the same, and methods relating thereto
US10041307B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 22, 2015 |
| Grant date | Aug 7, 2018 |
| Priority date | — |
| Expiry date | Nov 21, 2036 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L15/001
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A tubular member has a longitudinal axis, a first end, and a second end. The tubular member includes a pin connector including an external shoulder, an internal shoulder axially spaced from the external shoulder, and a plurality of threads in a region between the external shoulder and the internal shoulder that taper relative to the longitudinal axis at 1.0 to 1.5 inches per foot. The threads include an axial density measured in a number of threads per inch (TPI), and when the pin connector is threadably engaged with a box connector, each of the threads contacts a corresponding box thread on the box connector along a projected radial distance HC. In addition, the threads are configured such that the product of 2(√{square root over (3)})(HC)(TPI) is greater than or equal to 0.95 and less than or equal to 1.05.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.