Method and apparatus for making threaded joints
US4208775A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 1978 |
| Grant date | Jun 24, 1980 |
| Priority date | — |
| Expiry date | Sep 12, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/53687
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus are provided for making threaded joints, such as pipe joints, within a range of predetermined applied torque and turns values. A pipe or a pipe and a coupling are threaded onto the end of a pipe string. The applied torque is monitored and, when a reference torque is exceeded, the number of turns made is counted. According to a representative aspect of the invention, when either the actual torque or the actual turns are within a predetermined percentage of a predetermined minimum value for that parameter and the other parameter has exceeded a predetermined minimum value, an indication is generated to the operator of the apparatus that he should be ready to stop the joint making operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.