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2 487 909

(13)

(51)

IPC

C09K8/20(2006-01-01)

C09K8/42(2006-01-01)

(21) (22)

Application

2012114634/03, 2012-04-12

(24)

Start date

2012-04-12

(22)

Actual filing date

2012-04-12

(45)

Published

2013-07-20

(72)

Inventor

Durkin Vasilij VjacheslavovichBondarenko Aleksandr VladimirovichMymrin Mikhail NikolaevichRul' Leopol'T AleksandrovichSukhoguzov Leonid Nikolaevich

(73)

Holder

Obshchestvo S Ogranichennoj Otvetstvennost'Ju Institut Prirodnykh Gazov I Gazovykh Tekhnologij Gazprom Vniigaz"

BLOCKING COMPOSITE FOR ISOLATION OF LOSS-CIRCULATION ZONES DURING WELL DRILLING AND WORKOVER OPERATION Russian patent published in 2013 - IPC C09K8/20 C09K8/42

Abstract RU 2487909 C1

FIELD: oil and gas industry.

SUBSTANCE: composite contains (wt %): calcined soda 0.1; caustic soda 0.07; bentonite 1.0-2.0; biopolymer 0.2; polyanionic cellulose 0.5; modified starch 2; potassium chloride 5.0; sodium dodecyl sulphate - sodium lauryl sulphate 0.4; fractionated calcium carbonate 6.0-8.0; water - remaining amount.

EFFECT: improvement in efficiency of strata opening or blocking in conditions of abnormal low pressure.

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RU 2 487 909 C1

Authors

Durkin Vasilij Vjacheslavovich

Bondarenko Aleksandr Vladimirovich

Mymrin Mikhail Nikolaevich

Rul' Leopol'T Aleksandrovich

Sukhoguzov Leonid Nikolaevich

Dates

2013-07-20—Published

2012-04-12—Filed