Anti-rotational cementing apparatus
US5842517A · kind A · utility
68Cited by
18References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 5, 1997 |
| Grant date | Dec 1, 1998 |
| Priority date | — |
| Expiry date | May 5, 2017 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/167
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The apparatus of the present invention is a mechanism for use in cementing a casing string in a well bore comprising a float collar connectable to the casing string, a cement plug engagable to the float collar, and a wiper plug engagable to the cement plug, each element utilizing inclined plane J-slots for engagability. When engaged, the J-slots disallow not only rotational movement between the elements, but also vertical movement between the elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.