Rotary full-bore fracturing switch

• Main Authors: REN JIAMIN, GAO HENGCHAO, JIANG GUANGBIN, LI YUBAO, YU XUEXIN, LYU FANGLEI, ZHANG JIAN, TIAN HAORAN, ZHOU JINGCAI, LI GAN
• Format: Patent
• Language: English
• Published: 08.07.2015
• 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 discloses a rotary full-bore fracturing switch. The rotary full-bore fracturing switch comprises an upper connector, a lower connector, an outer sleeve, a sliding sleeve and a rotary sleeve. The upper connector and the lower connector are connected with the upper end and the lower end of the outer sleeve respectively. A radial through hole is formed in the circumferential wall of the upper end of the outer sleeve. The sliding sleeve capable of axially moving is sleeved with the outer sleeve. The rotary sleeve is sleeved with the lower connector. The sliding sleeve is connected with the rotary sleeve through a shear pin. The rotary sleeve axially moves while rotating, the sliding sleeve is accordingly driven to axially move, and therefore the radial through hole is opened and closed through the sliding sleeve. The fracturing switch is turned on through an assembling tool and can be repeatedly turned on and repeatedly turned off, and meanwhile a coincident bore is achieved. As the rotation of the turning-on tool is converted into the axial movement of the sliding sleeve inside the fracturing switch, the pulling force of the sliding sleeve is large, the on-off success rate is increased, the oil deposit exploiting efficiency and the device applicability are improved accordingly, and particularly the reliability of a directional well and the reliability of a horizontal well are improved.