PLUG FOR ISOLATION OF LOST-CIRCULATION ZONE IN WELL DRILLING Russian patent published in 1994 - IPC

Abstract RU 2018631 C1

FIELD: well drilling. SUBSTANCE: plug includes band-thread filler and has drilled out weight for its arrangement in wellbore in working position. Band-thread filler is made in form of bundle to provide for its straightening in flow of grouting mortar. One end of bundle is rigidly tied with drilled out weight. EFFECT: higher reliability of isolation due to restriction of grouting mortal spreading, and cut down material expenditures. 2 dwg

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RU 2 018 631 C1

Authors

Zhzhonov V.G.

Kateev I.S.

Vakula Ja.V.

Dates

1994-08-30—Published

1991-12-06—Filed