METHOD TO PREVENT CASING PIPE CRUSHING INSIDE WELL DRILLED IN PERMAFROST ROCK

METHOD TO PREVENT CASING PIPE CRUSHING INSIDE WELL DRILLED IN PERMAFROST ROCK

FIELD: oil and gas production, particularly to prevent damage of oil, gas and injection well casing pipes during well conservation and killing in permafrost rock zones. ^ SUBSTANCE: method involves arranging hydrosandblast perforator inside casing pipe at permafrost rock location site and cutting ca...

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Hauptverfasser: KONJUKHOV DMITRIJ ALEKSANDROVICH, KALASHNIKOV ANTON VLADIMIROVICH, KOROBOV STANISLAV VLADIMIROVICH, GUBAJDULLIN MARSEL' GALLIULOVICH
Format: Patent
Sprache:eng ; rus
Schlagworte:
EARTH DRILLING
EARTH DRILLING, e.g. DEEP DRILLING
FIXED CONSTRUCTIONS
MINING
OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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creator KONJUKHOV DMITRIJ ALEKSANDROVICH
KALASHNIKOV ANTON VLADIMIROVICH
KOROBOV STANISLAV VLADIMIROVICH
GUBAJDULLIN MARSEL' GALLIULOVICH
description FIELD: oil and gas production, particularly to prevent damage of oil, gas and injection well casing pipes during well conservation and killing in permafrost rock zones. ^ SUBSTANCE: method involves arranging hydrosandblast perforator inside casing pipe at permafrost rock location site and cutting casing pipe walls; arranging isolation cement bridges in area of outer casing pipe surface contact with upper and lower permafrost rock zone boundaries; supplying pressurized highly-viscous liquid, for instance heavy oil, in perforated cavities (channels) beyond casing pipes; removing free water from thawed rock area surrounding well to decrease water content in rock and elimination of ice formation in the case of repeated rock freezing. ^ EFFECT: elimination of casing pipe crushing in permafrost rock zones, seal failure in temporarily abandoned or killed oil and gas well during secondary freezing of thawed rock. ^ 1 dwg
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arranging isolation cement bridges in area of outer casing pipe surface contact with upper and lower permafrost rock zone boundaries; supplying pressurized highly-viscous liquid, for instance heavy oil, in perforated cavities (channels) beyond casing pipes; removing free water from thawed rock area surrounding well to decrease water content in rock and elimination of ice formation in the case of repeated rock freezing. ^ EFFECT: elimination of casing pipe crushing in permafrost rock zones, seal failure in temporarily abandoned or killed oil and gas well during secondary freezing of thawed rock. ^ 1 dwg</abstract><oa>free_for_read</oa></addata></record>
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subjects EARTH DRILLING
EARTH DRILLING, e.g. DEEP DRILLING
FIXED CONSTRUCTIONS
MINING
OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
title METHOD TO PREVENT CASING PIPE CRUSHING INSIDE WELL DRILLED IN PERMAFROST ROCK
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