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2 049 909

(13)

(51)

IPC

(21) (22)

Application

92002049/03, 1992-10-21

(22)

Actual filing date

1992-10-21

(45)

Published

1995-12-10

(72)

Inventor

Kateev I.S.Zhzhonov V.G.Fatkullin R.Kh.Vakula Ja.V.

(73)

Holder

Tatarskij Gosudarstvennyj Nauchno-Issledovatel'Skij I Proektnyj Institut Neftjanoj Promyshlennosti

PLUG FOR OSCILLATION OF LOST CIRCULATION ZONE IN WELL DRILLING Russian patent published in 1995 - IPC

Abstract RU 2049909 C1

FIELD: gas and oil producing industry. SUBSTANCE: plug for isolation of lost circulation zone has strip-threadlike fillers of different density. Besides, it has load in form of drilled material. Fillers have different in size strip lengths made in form of bundle whose one end is rigidly connected with end of weight. Fillers with density less than 1 g/cu.cm are connected with central part of load, and those with density exceeding 1 g/cu.cm are connected with periphery part of load. EFFECT: higher efficiency of isolation of lost circulation zone and reduced material expenditures due to restricted spreading of grouting mortar into formation. 2 dwg

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RU 2 049 909 C1

Authors

Kateev I.S.

Zhzhonov V.G.

Fatkullin R.Kh.

Vakula Ja.V.

Dates

1995-12-10—Published

1992-10-21—Filed