DEVICE FOR CLEANING TUBING PIPES COLUMN (VARIANTS) Russian patent published in 2005 - IPC

FIELD: oil industry.

SUBSTANCE: device has automatic scrapper, including body with axial aperture, knives, fixed on outer side surface of body, lower and upper stopping bushings. In tubing column upper and lower scrapper drive limiters are made. Upper drive limiter is made with possible change of direction of scrapper body movement for opposite direction by interaction with its upper stopping bushing. Device is provided with valve positioned lower than body but higher than lower scrapper drive limiter. Lower end stopping bushing of body is made with saddle for interaction with valve with possible interaction of the latter with lower limiter for changing direction of valve drive together with body for opposite direction. Upper drive limiter for scrapper is provided with limiter of valve drive relatively to body for separating valve from body and changing its movement direction in tubing pipes column with opposite direction independently from scrapper body movement. Second variant of device is different, because it has valve positioned lower than body, but higher than lower scrapper drive limiter. Lower edge stopping bushing of body is made with saddle for interaction with valve with possible interaction of the latter with lower limiter for changing drive direction of valve together with body on opposite one. Valve is provided with valve drive limiter relatively to upper scrapper drive limiter in tubing pipes column for separating valve from body and changing its movement direction on opposite one in tubing column independently from scrapper body movement. According to third variant device is different because it is provided with valve below the body and intermediate section with axial aperture and knives, positioned between body and valve, knives being fixed on it outer side surface and upper and lower connecting bushings. Lower end stopping bushing of body is made with saddle for interaction with upper connecting bushing of intermediate section. Lower connecting bushing of intermediate section is made with saddle for interaction with valve. Valve and intermediate section are provided with drive limiters for, respectively, valve and intermediate section relatively to upper scrapper drive limiter in tubing column for separating valve and intermediate section from body and changing their moving direction on opposite one in tubing column independently from each other and from scrapper body movement. According to fourth variant device is different because it is provided with valve positioned above lower scrapper drive limiter, outer diameter of valve being less than diameter of axial aperture of body for passing of valve upwardly through axial aperture of body. Upper edge stopping bushing of body is made with saddle for interaction with valve with possible interaction of the latter with lower and upper scrapper drive limiters for changing direction of scrapper movement in tubing pipes column.

EFFECT: higher efficiency.

4 cl, 12 dwg