China Petroleum Chemical Corporation

Sinopec Southwest Oil & Gas Company

Jingyu Cui

Zhimin Hou

Shunqu Hu

Yongmao Lin

Wei Lei

Tao Liu

Chen Chen

Wei Zhao

Zhenwei Gan

Qiang Wang

Bin Qi

Zhi Xie

Lei Wang

Yijun Zhou

Dan Hu

Wenjiang Teng

A differential-pressure sliding sleeve has an outer cylinder with a flow guiding hole being provided in a wall of the outer cylinder, an inner cylinder arranged in an inner cavity of the outer cylinder, an upper joint extending into the outer cylinder and fixedly connected to an upper end of the outer cylinder, a lower joint extending into the outer cylinder and fixedly connected to a lower end of the outer cylinder, and a dissolvable carrier ring arranged between the lower joint and the inner cylinder. An area of the axial upper end surface of the inner cylinder is greater than that of an axial lower end surface thereof, so that the working fluid generates a pressure difference to provide downward pressure for the inner cylinder, which moves downward under the pressure after the carrier ring is dissolved to open the flow guiding hole.

Differential pressure sliding sleeve, and oil and gas well fracturing construction method using same

A tool for perforating, packing and fracturing and a tubing string comprising the tool are disclosed. The tool comprises an upper connector, a connection sleeve, a mandrel, a packer, a lower connector, and an inner sleeve. The upper connector is provided with communication holes, and a nozzle is provided at each communication hole. The inner sleeve is provided on an inner wall of the upper connector to block the nozzle. Under an action of a fracturing fluid, the inner sleeve moves downwards to expose the nozzle, and the packer is packed. Then, perforating is performed through the nozzle. After perforating is finished, the nozzle is configured to be lost at a communication hole, and then fracturing is performed. When the tool is used, operation cost can be reduced, and reservoir stimulation effect can be improved.

Tool for jet packing and fracturing and tubular column comprising same

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Chengdu, China

Jingyu Cui