Method for fracturing sub-surface hardpan by drawing a particularly-angled tine therethrough
US4974681A · kind A · utility
3Cited by
6References
3Claims
0Family size
Inventor
Key dates
| Filing date | Dec 16, 1988 |
| Grant date | Dec 4, 1990 |
| Priority date | — |
| Expiry date | Dec 16, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01B13/08
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for fracturing below ground hardpan which includes entering a sub-soil tine beneath the lower surface of a layer of hardpan, with the upper surface angle of the tine in range of orientation which provides an improved fracturing width.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.