Method, Drilling Machine, Drill bit and Bottom Hole Assembly for Drilling by Electrical Discharge by Electrical Discharge Pulses
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| Other Authors: | , , , |
| Summary: | Title screen Machine for ground drilling, with a circulating fluid, by the utilization of electric discharge generated by high-voltage pulses between electrodes. It may comprise: - A drill-bit 1 with electrodes movable relative to each other, so that bottom-hole physical contact be secured for all the electrodes 4 on all bottom-hole topographies. - Pointed hydraulic nozzles for jetting the fluid, to remove primary cuttings and with pressure expansion across the nozzles 7 at no less than 4 MPa. - A high-voltage pulse generator deployed down-hole at a minimum distance from the drill-bit 1. - A rotating or oscillating bit causing the borehole cross-sectional excavation to occur, and electric discharge between a plurality of electrodes situated on the bit face along one or a few radii and tangents. - A bottom hole assembly for annular hole-making with core storage, transportation, down-hole closed loop discharge fluid circulation. A discharge fluid storage may be incorporated. A drilling method is also described. |
| Language: | Russian |
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| Online Access: | https://worldwide.espacenet.com/publicationDetails/biblio?CC=US&NR=2009133929A1&KC=A1&FT=D&ND=3&date=20090528&DB=EPODOC&locale=ru_ru# |
| Format: | Electronic Book |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=637205 |
| Summary: | Title screen Machine for ground drilling, with a circulating fluid, by the utilization of electric discharge generated by high-voltage pulses between electrodes. It may comprise: - A drill-bit 1 with electrodes movable relative to each other, so that bottom-hole physical contact be secured for all the electrodes 4 on all bottom-hole topographies. - Pointed hydraulic nozzles for jetting the fluid, to remove primary cuttings and with pressure expansion across the nozzles 7 at no less than 4 MPa. - A high-voltage pulse generator deployed down-hole at a minimum distance from the drill-bit 1. - A rotating or oscillating bit causing the borehole cross-sectional excavation to occur, and electric discharge between a plurality of electrodes situated on the bit face along one or a few radii and tangents. - A bottom hole assembly for annular hole-making with core storage, transportation, down-hole closed loop discharge fluid circulation. A discharge fluid storage may be incorporated. A drilling method is also described. |
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