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2 087 676

(13)

(51)

IPC

(21) (22)

Application

94031012/03, 1994-08-23

(22)

Actual filing date

1994-08-23

(45)

Published

1997-08-20

(72)

Inventor

Gorbunov Anatolij NikolaevichKamalov Oskar RinatovichAvilov Anatolij KharitonovichRjabokon' Aleksandr Aleksandrovich

(73)

Holder

Gorbunov Anatolij NikolaevichKamalov Oskar RinatovichAvilov Anatolij KharitonovichRjabokon' Aleksandr Aleksandrovich

DEVICE FOR REMOVING SORPTION CRUST FROM INNER SURFACE OF CASING STRINGS Russian patent published in 1997 - IPC

Abstract RU 2087676 C1

FIELD: oil and gas industry. SUBSTANCE: this is used in construction of oil and gas wells. Cleaning members of device are made in the form of bow-shaped spring strips and mounted on their surface are cutting members in the form of segments with radius close to radius of casing string circumference. Cleaning devices are attached to sleeves mounted on casing string being lowered down. Design of device allows for cutting off sorption crust directly at lowering of casing string. EFFECT: high efficiency. 1 dwg

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RU 2 087 676 C1

Authors

Gorbunov Anatolij Nikolaevich

Kamalov Oskar Rinatovich

Avilov Anatolij Kharitonovich

Rjabokon' Aleksandr Aleksandrovich

Dates

1997-08-20—Published

1994-08-23—Filed