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2 222 691

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IPC

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Application

2002109485/03, 2002-04-11

(24)

Start date

2002-04-11

(22)

Actual filing date

2002-04-11

(45)

Published

2004-01-27

(72)

Inventor

Burshtejn M.A.Gilaev G.G.Ljubushkin V.I.Terent'Ev S.A.Tsybin A.V.

(73)

Holder

Burshtejn Mark AnshelevichGilaev Gani GajsinovichLjubushkin Viktor IvanovichTerent'Ev Stanislav AlekseevichTsybin Aleksandr Vladimirovich

PUMP SAND FILTER Russian patent published in 2004 - IPC

Abstract RU 2222691 C2

FIELD: equipment used in oil wells while oil is extracted from wells with show of sand. SUBSTANCE: sand filter includes inner perforated framework with filtering mesh or wire coiling and perforated housing. Perforation of housing comes in the form of lateral slots directed from wall of housing towards its outer surface, downwards with respect to axis of filter. Lower edge of slot in outer cylindrical surface of housing is located above upper edge of slot in inner surface of housing. EFFECT: enhanced functional efficiency of sand filter. 1 dwg

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RU 2 222 691 C2

Authors

Burshtejn M.A.

Gilaev G.G.

Ljubushkin V.I.

Terent'Ev S.A.

Tsybin A.V.

Dates

2004-01-27—Published

2002-04-11—Filed