METHOD OF DETERMINING LOCATION OF BOTTOM BOUNDARY OF TOROS AND HUMMOCK CONSOLIDATED LAYER IN ELECTRO-THERMAL DRILLING Russian patent published in 2017 - IPC E21C39/00 G01N9/00 

FIELD: oil and gas industry.

SUBSTANCE: electro-thermal well drilling is performed in ice along with recording on a computer or a drilling speed logger. Simultaneously with drilling, suction of the meltwater heating crown from the edge of the working zone is carried out and then it is supplied onto the ice surface to the location of the drill operator. The operator visually monitors the presence and intensity of the fluid flow, recording the transition from the air-water mixture to the constant fluid flow by marking the drilling speed in the computer register by pressing a special button. The dependence of the drilling speed is compared with the operator's mark on the presence of a constant flow of water, taking into account the time of water passing from the well through the hose to the outlet of the pump. The change in drilling speed, corresponding to the transition of a drill from dense ice to loose ice or the void closest to the mark, is defined as the drill exit from the consolidated layer and the depth of the bottom boundary of the consolidated layer is established.

EFFECT: determination of the depth of the bottom boundary of the consolidated layer for non-core drilling.

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