Method and apparatus for establishing injection into a cased bore hole using a time delay toe injection apparatus
US9121247B2 · kind B2 · utility
15Cited by
2References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 7, 2013 |
| Grant date | Sep 1, 2015 |
| Priority date | — |
| Expiry date | Dec 6, 2033 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An apparatus and method for providing a time delay in injection of pressured fluid into a geologic formation. In one aspect the invention a toe valve activated by fluid pressure that opens ports after a predetermined time interval to allow fluid to pass from a well casing to a formation. The controller time delay enables casing integrity testing before fluid is passed through the ports. This time delay also allows multiple valves to be used in the same well casing and provide a focused jetting action to better penetrate a concrete casing lining.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.