Tubular connection
US4917409A · kind A · utility
114Cited by
6References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 6, 1988 |
| Grant date | Apr 17, 1990 |
| Priority date | — |
| Expiry date | Sep 6, 2008 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B17/0423
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An improved threaded connection adapted to secure adjacent conduits in a continuous flow conduit forming relationship. The threaded connection employs a tapered or wedge shaped thread with angled or tapered thread load flanks to obtain superior mechanical strength by controlling stress levels in the connection. To insure proper make-up of the connection the dimension of the thread structure is controlled to prevent trapping of thread lubricant during rotational make-up which may produce false torque make-up values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.