Externally-orientated internally-corrected perforating gun system and method
US9115572B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 16, 2015 |
| Grant date | Aug 25, 2015 |
| Priority date | — |
| Expiry date | Jan 16, 2035 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/119
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An externally-oriented internally-corrected perforating gun system and method for accurate perforation in a deviated wellbore is disclosed. The system/method includes a gun string assembly (GSA) deployed in a wellbore with an external protuberance member (EPM) and an internal pivot support (IPS). With the EPM oriented to the high side of the wellbore, the center of mass of the GSA positions the GSA at the lower side of the wellbore surface. The IPS is attached to internal gun components such end plate, charge holder tube, detonating cord or charge case. The charges inside the charge holder tube move with the gravitational vector about the IPS and point more accurately in the desired direction for perforating. The external orientation of the EPM along with limited internal swing about the IPS provide for an accurate orientation of the charges that results in efficient and effective perforating through a hydrocarbon formation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.