发明名称 |
METHOD OF SEALING THE CASING STRING-BOREHOLE ANNULUS |
摘要 |
repair and sealing operations on wells of oil and gas deposits, particularly, methods of recovery of seal of casing-string-borehole annulus. SUBSTANCE: method consists in treatment of casing string in interval of securing of casing string-borehole annulus with variable polarity of electric current with its density of 20-40 A/sq.m. Simultaneously, treatment is additionally carried out with variable polarity electric current and its periodically varying density from 1 to 20 A/sq.m. In doing so, time for treatment with current of positive polarity exceeds that for treatment with current of negative polarity. EFFECT: higher efficiency of sealing of casing string-borehole annulus and elimination of flows-over in casing string-borehole annulus. 2 dwg, 1 ex
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申请公布号 |
RU2165005(C1) |
申请公布日期 |
2001.04.10 |
申请号 |
RU20000124576 |
申请日期 |
2000.09.27 |
申请人 |
ZAKRYTOE AKTSIONERNOE OBSHCHESTVO "GEOTEKHNOKIN" |
发明人 |
BREKHUNTSOV A.M.;DZHAFAROV I.S.;KHISMETOV T.V.;SHARIFULLIN F.A.;BARANOV V.B.;GORBUNOV M.P.;SHATSKIJ A.V. |
分类号 |
E21B33/13;(IPC1-7):E21B33/13 |
主分类号 |
E21B33/13 |
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