Stage cementing tool
US8800655B1 · kind B1 · utility
34Cited by
4References
20Claims
0Family size
Inventor
Key dates
| Filing date | Feb 1, 2011 |
| Grant date | Aug 12, 2014 |
| Priority date | — |
| Expiry date | Dec 31, 2031 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/146
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A mechanical stage cementing tool that includes a mechanical opening and closing seat sleeve and a pin sub. The mechanical stage cementing tool may be converted to a hydraulic stage cementing tool by inserting a hydraulic tube assembly into the mechanical opening and closing seat sleeve at a hydraulic modification area and by adding a hydraulic seat to the pin sub. The stage cementing tool has a running-in-hole position, an open position, and a closed position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.