A differential pressure sliding sleeve and water injection pipe column

• Main Authors: HAN ZHONGXUAN, FANG ZHIGANG, ZHAO SHUO, LI YUNTAO, WEN WEIHAO, MA SHUAIBANG
• Format: Patent
• Language: Chinese; English
• Published: 09.06.2020
• 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 provides a differential pressure sliding sleeve and a water injection string, relates to the technical field of oil and gas drilling and production, and is used for solving the technical problems that an existing water injection mode is prone to failure and complex in maintenance and operation, the differential pressure sliding sleeve comprises a body and a sliding sleeve body; acentral channel is further formed in the body and penetrates through the body in the axis direction of the body. An overflowing channel is formed in the side wall of the body and penetrates through the side wall; the body is sleeved with the sliding sleeve, and a pressure cavity communicated with the overflowing channel is formed between the sliding sleeve and the body; a first connecting piece fixedly connected with the side wall of the body is arranged on the sliding sleeve; when the fluid pressure in the pressure cavity is larger than the preset pressure, the first connecting piece is disconnected, the sliding sle