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2 291 182

(13)

(51)

IPC

C09K8/20(2006-01-01)

(21) (22)

Application

2005120083/03, 2005-06-28

(24)

Start date

2005-06-28

(22)

Actual filing date

2005-06-28

(45)

Published

2007-01-10

(72)

Inventor

Jakovlev Igor' Grigor'Evich

(73)

Holder

Gosudarstvennoe Obrazovatel'Noe Uchrezhdenie Vysshego Professional'Nogo Obrazovanija Gosudarstvennyj Neftegazovyj Universitet"

WEIGHTED DRILLING FLUID FOR EXPOSING PRODUCING FORMATIONS Russian patent published in 2007 - IPC C09K8/20

Abstract RU 2291182 C1

FIELD: oil and gas production.

SUBSTANCE: weighted drilling fluid for exposing zones with abnormally high formation pressures contains, wt %: clay 1-2, barite 10-60, sodium formate as stabilizing reagent 10-30, and carboxymethylated starch as rheological and filtration property regulator 1-5.

EFFECT: improved flocculation property of fluid, increased drilling speed, increased heat resistance of fluid, and decreased corrosion effect.

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RU 2 291 182 C1

Authors

Jakovlev Igor' Grigor'Evich

Dates

2007-01-10—Published

2005-06-28—Filed