Drillable ball throwing sliding sleeve for fracturing and acidizing horizontal well in segmented way

• Main Authors: ZHANG HUALI, DENG YOUCHAO, YIN QIANG, LI HANG, LUO JUN, YU CHENGGANG, ZHAO SHENGLAN
• Format: Patent
• Language: Chinese; English
• Published: 29.02.2012
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The utility model relates to a drillable ball throwing sliding sleeve for fracturing and acidizing a horizontal well in a segmented way, applied to oilfield acidizing and fracturing. The lower end of an upper joint is connected with a sand blasting pipe, outside threads are arranged at the lower end of the sand blasting pipe, and the lower end of the sand blasting pipe is in threaded connection with a lower joint; three radial sand blasting holes are arranged on the wall of the sand blasting pipe; an elastic self-locking sliding sleeve is respectively arranged in center holes of the upper joint, the sand blasting pipe and the lower joint, an elastic expansion ring is arranged at the upper end of each elastic self-locking sliding sleeve, axial pin grooves are uniformly distributed on the outer wall at the middle part of each elastic self-locking sliding sleeve, anti-rotation pins are fixed on the sand blasting pipe, and the inner ends of the anti-rotation pins are arranged in the axial pin groove of each elast