China Petroleum Chemical Corporation

Sinopec Southwest Oil & Gas Company

Huawei Technologies Co., Limited

Sichuan University

Chengdu University of Technology

Chen Chen

Zhimin Hou

Shunqu Hu

Dan Hu

Haitao Yang

Yin Zhao

Wei Lei

Tao Liu

Jiang Qian

Wei Zhao

Zhenwei Gan

Qiang Wang

Bin Qi

Zhi Xie

Yijun Zhou

Yongmao Lin

Bing Zeng

Shuyuan Zhu

Jun Chen

Wenqiang Li

Wu Zhao

Song Li

Keren Dai

Lei Wang

Jingyu Cui

Wenfeng Pang

Xianlin Shi

Wenjiang Teng

Zhong Tang

Chuanxiao Li

Zexiang Miao

Jianfa Ci

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 reservoir bank landslide susceptibility evaluation method. The method includes the following steps: S, acquiring geophysical parameters; S, calculating stability of a reservoir bank after impoundment through a static geological evaluation model according to the geophysical parameters; S, obtaining an average displacement velocity in a geographic coordinate system according to single look complex (SLC) images after impoundment; and S, according to the average displacement velocity in the geographic coordinate system and the stability of the reservoir bank after impoundment of the reservoir, obtaining a reservoir bank landslide susceptibility grade. According to the method, a problem that present landslide susceptibility evaluation methods all adopt a single model to evaluate landslide susceptibility, which has low evaluation accuracy of the landslide susceptibility is solved.

Reservoir bank landslide susceptibility evaluation method

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 self-adaptive luggage transfer device and system. The self-adaptive luggage transfer device includes a base, a conveyor mechanism, a lifting mechanism and a self-adaptive extendable transfer mechanism. The lifting mechanism is arranged between the conveyor mechanism and the base and is configured to drive the conveyor mechanism to lift. The self-adaptive extendable transfer mechanism is obliquely arranged between the conveyor mechanism and the base and is in transmission connection with the lifting mechanism. Two ends of the self-adaptive extendable transfer mechanism are movably connected to an output end of the conveyor mechanism and the base, respectively. The conveyor mechanism is configured to drive an end of the self-adaptive extendable transfer mechanism connected to the conveyor mechanism to lift in a first direction, and the lifting mechanism is configured to drive at least one end of the self-adaptive extendable transfer mechanism to move in a second direction.

Self-adaptive luggage transfer device and system

A deblocking filtering method and a deblocking filter are provided. The method includes: determining, according to a current pixel value of a to-be-filtered pixel in a picture block and pixel values of pixels in a first neighbouring partition of the to-be-filtered pixel, a first filtering offset value of the to-be-filtered pixel; performing prediction on the pixel value of the to-be-filtered pixel according to pixel values of pixels in a second neighbouring partition of the to-be-filtered pixel to obtain a prediction value of filtered value of the to-be-filtered pixel; and determining an actual filtered value of the to-be-filtered pixel according to the current pixel value, the first filtering offset value, and the prediction value of filtered value.

Deblocking filtering method and deblocking filter

An intra-frame encoding method, an intra-frame decoding method, an encoder, and a decoder, where the intra-frame encoding method includes obtaining reference pixel values of a current picture block obtaining a predicted value of a first-type pixel in the current picture block according to the reference pixel values of the current picture block using an intra-frame prediction algorithm, obtaining residual values of the first-type pixel, obtaining transform coefficients according to the residual values of the first-type pixel, quantizing the transform coefficients, reconstructing the first-type pixel according to the quantized transform coefficients and the predicted value of the first-type pixel, and obtaining a reconstructed value of the second-type pixel according to the reconstructed value of the first-type pixel using an interpolation method. Hence, flexible encoding can be implemented, and encoding efficiency can be improved.

Intra-frame encoding method, intra-frame decoding method, encoder, and decoder

Growing community of inventors

Chengdu, China

Chen Chen