Method and apparatus for rotating tubing conduits
US4239083A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 7, 1979 |
| Grant date | Dec 16, 1980 |
| Priority date | — |
| Expiry date | May 7, 1999 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/14
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An apparatus which is carriable on a tubing string extendible within a subterranean well, wherein the tubing string has an upper tubing section which is extendible from and above the apparatus to the top of the well, and a lower tubing section which is extendible from and below the apparatus. The apparatus is manipulatable to rotate the lower tubing section without rotating the upper tubing section and comprises first and second housings, one of the housings and the lower tubing section being rotatable relative to the other of the housings. Actuator means are insertable within at least one of the housings for applying rotation to one of the housings. Co-engaging means are provided on the actuator means and one of the housings for applying rotational force to one of the housings and the lower tubing section to rotate the one housing and the lower tubing section without rotating the other of the housings and the upper tubing section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.