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2 520 101

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(51)

IPC

E21B31/00(2006-01-01)

(21) (22)

Application

2012140598/03, 2012-09-21

(24)

Start date

2012-09-21

(22)

Actual filing date

2012-09-21

(45)

Published

2014-06-20

(72)

Inventor

Goronovich Sergej NikolaevichOlejnikov Aleksandr NikolaevichKozhina Tat'Jana VladimirovnaKuznetsov Roman Jur'EvichCherepanov Vsevolod VladimirovichBel'Skij Dmitrij Gennad'Evich

(73)

Holder

Obshchestvo S Ogranichennoj Otvetstvennost'Ju Nauchno-Issledovatel'Skij I Proektnyj Institut Nefti I Gaza"

METHOD FOR PREVENTION OF DRILLING EQUIPMENT STICKING IN WELL Russian patent published in 2014 - IPC E21B31/00

Abstract RU 2520101 C2

FIELD: oil and gas industry.

SUBSTANCE: method includes suppression of sodium chloride crystallisation on the well walls by treatment of salt-saturated mud with an inhibitor of sodium chloride crystallisation. Glycerine is used as an inhibitor of sodium chloride crystallisation; it is added to the salt-saturated mud in quantity of 5-30 wt % to the volume of the salt-saturated mud depending on the temperature in the well.

EFFECT: enlargement of inventory for sticking prevention, simplified technology, improved characteristics of the drilling mud.

4 tbl

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RU 2 520 101 C2

Authors

Goronovich Sergej Nikolaevich

Olejnikov Aleksandr Nikolaevich

Kozhina Tat'Jana Vladimirovna

Kuznetsov Roman Jur'Evich

Cherepanov Vsevolod Vladimirovich

Bel'Skij Dmitrij Gennad'Evich

Dates

2014-06-20—Published

2012-09-21—Filed