Well completion convertible float shoe/collar
US6401824B1 · kind B1 · utility
24Cited by
14References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 13, 2000 |
| Grant date | Jun 11, 2002 |
| Priority date | — |
| Expiry date | Mar 13, 2020 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B34/142
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An improved float shoe/collar apparatus is provided for use during casing run in or floated in. The apparatus has an inner tubular member and outer tubular member, movable upon release of shear pins to cause longitudinal movement relative to each other. The movement of the inner tubular member closes a plurality of downward jets and opens a plurality of upward jets. The apparatus also is equipped with a set of check valves, held open on run in, and activated to close upon cementing to prevent “u-tubing” of fluid back into the casing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.