Multi-stage perforation and shock wave combined device and method for initial fracture enhancement
US11840914B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 1, 2023 |
| Grant date | Dec 12, 2023 |
| Priority date | — |
| Expiry date | Aug 1, 2043 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/09
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A multi-stage perforation and shock wave combined device and method for initial fracture enhancement are provided. The multi-stage perforation and shock wave combined device for initial fracture enhancement includes a perforating gun and a shock wave excitation nipple, where the perforating gun is configured to fire perforating bullets into a formation to form initial fractures; the shock wave excitation nipple is connected to the perforating gun, and includes an energetic rod capable of exploding after excitation and a feeding assembly; the feeding assembly includes a pushing head, a reciprocating spring, and a feeding spring; and the reciprocating spring is configured to push the pushing head, so as to push a spare energetic rod into a target position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.