Tubing string hanging apparatus
US5465788A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 1, 1995 |
| Grant date | Nov 14, 1995 |
| Priority date | — |
| Expiry date | Feb 1, 2015 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/0415
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An apparatus for rotatably hanging a tubing string in the wellhead of a well casing. The apparatus includes a tubing hanger shell that has a mandrel rotatably mounted therein. The mandrel has upper and lower ends with the upper end connected to a tubing rotator and the lower end engaging a tubing string. To facilitate the connection and disengagement of the mandrel to the tubing rotator, a hollow sleeve is used to couple the parts together. The hollow sleeve is received within the mandrel and has longitudinal splines which engage corresponding splines on the mandrel to transfer rotational energy from the rotator to the mandrel. The rotator is removed from the mandrel through the application of force, and through movement, in a direction parallel to the longitudinal axis of the tubing string.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.