Electrohydraulic Drilling

a drilling method in which the rock at the bottom of a borehole filled with water is broken by a water hammer that is created by means of a high-voltage (up to 200 kilovolts) pulse discharge. The method was first developed in the USSR by L. V. Iutkin in the 1950’s.

The drill consists of a nonrotating tubular electrode and a rotating central electrode. High-voltage current pulses are supplied to the electrodes from the surface at a given rate. Electrical breakdown in the interelectrode gap occurs via the water. In the liquid, the expanding gas pocket of the breakdown creates the water hammer that breaks the rock at the bottom of the borehole.

单词	electrohydraulic drilling
释义	Electrohydraulic Drilling Electrohydraulic Drilling a drilling method in which the rock at the bottom of a borehole filled with water is broken by a water hammer that is created by means of a high-voltage (up to 200 kilovolts) pulse discharge. The method was first developed in the USSR by L. V. Iutkin in the 1950’s. The drill consists of a nonrotating tubular electrode and a rotating central electrode. High-voltage current pulses are supplied to the electrodes from the surface at a given rate. Electrical breakdown in the interelectrode gap occurs via the water. In the liquid, the expanding gas pocket of the breakdown creates the water hammer that breaks the rock at the bottom of the borehole.
随便看	thickskin thick skinned thick-skinned thick-skinnedly thick-skinned structure thick skin, to have a thickskull thick-skulled thick-skulledly thicksotropic thick-split graft thickspread thickspreadly thick squall thick-stemmed thick stuff thick-thin chart thick/thin on the ground thick wall cylinder thick wind thick-winded thickwire thick with thick with somebody thick with someone