Anti-rotation apparatus for limiting rotation of cementing plugs
US6796377B2 · kind B2 · utility
14Cited by
32References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 23, 2002 |
| Grant date | Sep 28, 2004 |
| Priority date | — |
| Expiry date | Aug 2, 2022 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/167
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An apparatus for preventing or limiting the rotation of cementing plugs in a casing string during drillout. The apparatus includes an outer housing with a sleeve disposed therein. The sleeve has an inner surface configured to engage cementing plugs received therein to cause an interference fit. The sleeve will hold the cementing plugs when rotational forces, such as drilling forces, are applied so that during drillout, rotation of the cementing plug is prevented or is at least limited.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.