Flow isolation sub for tubing operated differential pressure firing head
US8763507B2 · kind B2 · utility
9Cited by
27References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 21, 2011 |
| Grant date | Jul 1, 2014 |
| Priority date | — |
| Expiry date | Jan 3, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/1677
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An isolation sub for use in a perforating system that includes a pressure activated firing head. The isolation sub is set between the pressure source that is used to initiate the firing head. A pressure regulator in the sub is responsive to fluctuations in pressure difference between the pressure source and wellbore and isolates the firing head when the pressure difference is at or approaches a designated pressure difference that could initiate the firing head. The pressure regulator includes a spring loaded piston that seals the firing head from the source pressure before the pressure difference activates the firing head.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.