Spinner for use in connecting pipe joints
US4683962A · kind A · utility
Inventor
Key dates
| Filing date | Oct 6, 1983 |
| Grant date | Aug 4, 1987 |
| Priority date | — |
| Expiry date | Oct 6, 2003 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B19/168
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A spinner for rotating a pipe, such as a spinner mandrel, including a chambered frame having aligned openings through which the pipe can be inserted, drive assembly, such as a sprocket, rotatably mounted in the chamber, endless flexible spinning member, such as a multistrand roller chain, normally slackly encircling the pipe and the drive assembly, and clutch assembly, such as an idler sprocket in engagement with the multistrand roller chain and a hydraulically actuatable piston for laterally moving the idler sprocket, for decreasing the slack sufficiently to force the endless spinning member into frictional rotational driving engagement with the pipe. The preferred embodiment comprises a kelly spinner for use on an oil rig for independently spinning the kelly in order to more safely connect and disconnect drill pipe joints with the kelly during drilling operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.