Power operated pipe slips and pipe guide
US4306339A · kind A · utility
33Cited by
10References
4Claims
0Family size
Inventor
Key dates
| Filing date | Feb 21, 1980 |
| Grant date | Dec 22, 1981 |
| Priority date | — |
| Expiry date | Feb 21, 2000 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B19/10
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A pipe or casing spider coaxially overies a base ring and is provided with a plurality of slips supported by a slip ring above the spider. The slip ring and slips are moved vertically by a plurality of pressure cylinders interposed between the base ring and slip ring. A support plate coaxially underlies the base ring and is provided with a radial latch tongue slidable toward and away from the axis of the spider for maintaining a tubular string coaxially aligned with the spider.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.