China Petroleum Chemical Corporation

Sinopec Southwest Oil & Gas Company

Zhimin Hou

Shunqu Hu

Tao Liu

Chen Chen

Zhenwei Gan

Bin Qi

Wei Lei

Wei Zhao

Yongmao Lin

Dan Hu

Zhi Xie

Yijun Zhou

Jun Chen

Jiang Qian

Qiang Wang

Lei Wang

Wenfeng Pang

Jingyu Cui

Wenjiang Teng

Yancheng Yan

Jianfa Ci

Xingwen Wang

Haifeng Dong

Lin Lan

Zhou Fang

Zhiguo Qiao

Xiaogang Wang

Jian Pan

A wellbore staged operation method includes running, after a first well drifting operation is performed on a wellbore, a pipe string () in the wellbore, wherein the pipe string () includes, along a direction from bottom to top, a floating hoop (), a plug seat (), a toe-end sliding sleeve (), and a fracturing sliding sleeve (); performing a cementing operation, wherein cement slurry pumped into an inner chamber of the pipe string () enters an annulus between the pipe string and the wellbore through the plug seat () and the floating hoop () to form a cement sheath, the cement sheath isolating the toe-end sliding sleeve () from the fracturing sliding sleeve (); performing a second drifting operation to ensure the toe-end sliding sleeve () of the pipe string () exposed; performing a pressure test for the pipe string; and performing staged fracturing constructions.

Wellbore staged operation method and rubber plug for said method

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 sliding sleeve device has an outer cylinder, a circulation hole being provided in the wall of the outer cylinder; and an inner cylinder provided in an inner cavity of the outer cylinder. In an initial state, the inner cylinder and the outer cylinder are fixed to each other to seal the circulation hole. In a first state, the inner cylinder is movable relative to the outer cylinder, thereby unsealing the circulation hole. A protection mechanism is provided in the circulation hole, which has an inner member located on the radially inner side and an outer member located on the radially outer side.

Sliding sleeve device

A new sliding sleeve relates to the technical field of oil and gas well completion and reservoir stimulation, comprising an upper connector, a lower connector, an outer housing, an inner sleeve and a shear pin. The upper connector and the lower connector are respectively connected to two ends of the outer housing, and the inner sleeve is locked in the outer housing via the shear pin, wherein a flow guiding hole is provided in the outer housing, and the inner sleeve can open or close the flow guiding hole, wherein at least two grooves for engaging with at least two corresponding tooth-shaped elements on a sliding sleeve opening tool are disposed along an axial direction in the inner sleeve, and wherein an erosion-resistant ring is embedded in the groove, and an inner diameter of the erosion-resistant ring is larger than or equal to an inner diameter of the inner sleeve.

Sliding sleeve

A sliding sleeve opening tool includes an engaging element, a ball seat and a guiding head connected in sequence, as disclosed herein. The engaging element includes at least two elastic pawls uniformly disposed in a circumferential direction and at least one engaging part disposed on an external circumferential surface of an elastic pawl, and the engaging element is further provided with a first fluid channel which runs through the engaging element. The ball seat is provided with a second fluid channel which runs through the ball seat, and within the second fluid channel a taper hole section for bearing a sealing ball is disposed, the second fluid channel being in communication with the first fluid channel. The guiding head is provided with a third fluid channel which runs through the guiding head, and the third fluid channel is in communication with the second fluid channel. The sliding sleeve opening tool has at least one of the pushing function, the fishing function, the pushing assistance function, the mud scraping function and the sealing function.

Tool for opening sliding sleeve

A device for perforating, packing, and fracturing and a tubing string comprising the device are disclosed, wherein the device comprises an upper connector, a nozzle sleeve, a mandrel, a packer, a lower connector, a first inner sleeve provided inside the upper connector, and a second inner sleeve provided inside the nozzle sleeve, further wherein the upper connector is provided with a fracturing hole, and a nozzle is provided at the nozzle sleeve.

Device for jet packing and fracturing and tubular column comprising 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

Zhimin Hou