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
申请公布号
RU2222691(C2)
申请公布日期
2004.01.27
申请号
RU20020109485
申请日期
2002.04.11
申请人
BURSHTEJN MARK ANSHELEVICH;GILAEV GANI GAJSINOVICH;LJUBUSHKIN VIKTOR IVANOVICH;TERENT'EV STANISLAV ALEKSEEVICH;TSYBIN ALEKSANDR VLADIMIROVICH