Guide head for pipe rackers
US3937514A · kind A · utility
17Cited by
4References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 22, 1974 |
| Grant date | Feb 10, 1976 |
| Priority date | — |
| Expiry date | Nov 22, 1994 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B19/14
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A pipe guide head for well pipe racking apparatus has plural slides defining different sizes of pipe receiving guide openings, extensible from retracted positions within the body to extended positions for receiving pipe, each slide being connected with a lever arm pivoted on the body to close the lever arm across the pipe opening upon extension of the slide and open the lever upon retraction of the slide. Fluid pressure operated actuators are connected with the slides to extend and retract them.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.