Process and device for executing the screwing of a threaded joint for tubes, equipped with a stop
US4700576A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 8, 1985 |
| Grant date | Oct 20, 1987 |
| Priority date | — |
| Expiry date | Oct 8, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49766
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A process is provided for executing the screwing of a threaded joint for steel tubes, designed especially for the petroleum industry, of the type having a male element (1) with external threading (3) and female element (2) with internal threading (4), as well as at least one pair of screwing limit stops (5, 6). A strain gauge which allows the instantaneous determination of longitudinal deformations of the external surface along a line of the female element (2) is applied to the external surface of the female element (2) at a certain distance from the plane of the screwing limit stop and on the side of said plane which is opposite to the threads (3, 4), and the screwing down of the joint is executed until the indications provided by the strain gauge corresponds to an extension of a predetermined value of the surface of the female element (2) along said line at the level of the gauge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.