Method and apparatus for ballistic tailoring of propellant structures and operation thereof for downhole stimulation
US9447672B2 · kind B2 · utility
7Cited by
29References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2013 |
| Grant date | Sep 20, 2016 |
| Priority date | — |
| Expiry date | Apr 22, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF42B1/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Propellant structures and stimulation tools incorporating propellant structures may comprise composite propellant structures including two or more regions of propellant having different compositions, different grain structures, or both. An axially extending initiation bore containing an initiation element may extend through a center of the propellant structure, or may be laterally offset from the center. An offset initiation bore may be employed with a composite grain structure. Methods of tailoring ballistic characteristics of propellant burn to result in desired operational pressure pulse characteristics are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.