Southwest Petroleum University

Southern Marine Science and Engineering Guangdong Laboratory (zhanjiang)

Xin Jing

Guorong Wang

Yang Tang

Yufa He

Xushen Li

Qingyou Liu

Qingping Li

Jinzhong Wang

Jinhai Zhao

Zeliang Li

Guangjie Yuan

Peng Zhao

Shouwei Zhou

Lin Zhong

Hexing Liu

Jie Wu

Yanjun Li

Leizhen Wang

Zhong Li

Jiang Lu

Haoyu Xiong

Jianglin Zhu

Xiaoyu Fang

Zhidong Zhang

A cavity creation tool by crushing with multi-stage controllable water jet, it is used in natural gas hydrate development and mainly consists of an inner tube upper joint, an inner tube lower joint, an intermediate sleeve, an inner structure consisting of a coaxial throttle push rod, an outer layer sleeve, an outer layer structure consisting of a supporting ring, a jet head mounted to the intermediate sleeve and threading the outer layer sleeve, and a jet crushing structure consisting of a single-stage telescopic jet head and a two-stage telescopic jet head.

Cavity creation tool by crushing with multi-stage controllable water jet for natural gas hydrate development

Disclosed is an oil extraction and gas production method capable of in-situ sand control and removal by downhole hydraulic lift achieved by downhole oil extraction and gas production system and ground oil extraction and gas production system. The downhole systems mainly comprises a double-layer tube, a double-layer tube reducing joint, a double-layer tube packer, a hydrodynamic turbine motor, a sludge screw pump, a soil-sand separator and a negative pressure absorber; the ground system comprises a power fluid pressurizing module and a mix fluid treatment module. The present application lowers the difficulty of pumping and lifting downhole formation fluid; achieves downhole and in-situ sand control and sand discharge, alleviates the blockage and erosion of sand particles on equipments and reduces energy consumption; decreases the production cost and improves the operation efficiency, therefore is suitable for oil extraction and gas production in high sand content wells.

Oil extraction and gas production method capable of in-situ sand control and removal by downhole hydraulic lift

The present invention relates to a combined crushing super-variable-diameter drill bit for natural gas hydrate exploitation, including a joint, an outer cylinder connected to the joint by thread, a nozzle I mounted in the outer cylinder, a mechanical locking mechanism, a blade telescoping mechanism, an end cap connected to the outer cylinder by thread, a seal ring IV mounted to the end cap, and a nozzle II mounted in the end cap by threaded connection. The present invention achieves integrated operation of conventional drilling and draw-back expanding, which can effectively solve the problems that the existing hydrate drill bit cannot drill a large borehole, cannot mechanically lock an extending position of the blade to stabilize the size of the borehole, and a single crushing method is inefficient.

Combined crushing super-variable-diameter drill bit for natural gas hydrate exploitation

Growing community of inventors

Chengdu, China

Xin Jing