Wiper plug perforating system
US8127846B2 · kind B2 · utility
72Cited by
8References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 27, 2009 |
| Grant date | Mar 6, 2012 |
| Priority date | — |
| Expiry date | Jun 11, 2029 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/11
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method and system for cementing and perforating a wellbore in a single step by coupling a perforating gun with a wiper plug. The method includes injecting cement in a wellbore having casing therein and an annulus between the casing and wellbore. A wiper plug is dropped on the cement having a perforating gun attached to the wiper plug. The plug is forced downward pulling the perforating gun along. The downward motion of the plug in turn pushes the cement out the bottom end of the casing and into the annulus. The cement in the annulus is allowed to set and the perforating gun is activated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.