Flame jet tool for drilling to great depths
US4099584A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 10, 1976 |
| Grant date | Jul 11, 1978 |
| Priority date | — |
| Expiry date | Jun 10, 1996 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B27/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A flame jet tool for drilling a hole in the ground at great depths is disclosed. The tool comprises a flame jet lance having a drill bit and an associated fuel system. The lance is disposed in a guide sheath such that the lance may be raised and lowered therefrom. The tool may also include means for capturing debris. In operating the flame jet tool of the present invention, the guide sheath is lowered into a preexisting well hole a specific distance. The guide sheath is fixed to the sides of the hole and the flame jet lance is lowered from the guide sheath. At a predetermined point, the drill bit is ignited and caused to rotate thus increasing the depth of the hole. By the use of the flame jet tool of the present invention, holes of significant depth can be increased and materials of extraordinary hardness can be pierced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.