公开(公告)号：US11542789B2

公开(公告)日：2023-01-03

申请号：US17537447

申请日：2021-11-29

申请人： Southwest Petroleum University ,  Southern Marine Science and Engineering Guangdong Laboratory (Zhanjiang)

发明人： Yang Tang ,  Peng Zhao ,  Guorong Wang ,  Jinhai Zhao ,  Qingyou Liu ,  Jinzhong Wang ,  Guangjie Yuan ,  Yufa He ,  Qingping Li ,  Xushen Li ,  Xiaoyu Fang ,  Zeliang Li ,  Xin Jing

IPC分类号： E21B41/00 ,  E21B34/10

摘要： 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.

公开(公告)号：US11199050B2

公开(公告)日：2021-12-14

申请号：US17086398

申请日：2020-10-31

申请人： Southern Marine Science and Engineering Guangdong Laboratory (Zhanjiang) ,  Southwest Petroleum University

发明人： Guorong Wang ,  Yang Tang ,  Xin Jing ,  Qingyou Liu ,  Shouwei Zhou ,  Xushen Li ,  Lin Zhong ,  Qingping Li ,  Yufa He ,  Zhong Li ,  Yanjun Li ,  Hexing Liu ,  Jianglin Zhu ,  Jiang Lu ,  Leizhen Wang

IPC分类号： E21B10/32 ,  E21B10/43 ,  E21B41/00 ,  E21B10/18 ,  E21B10/16 ,  E21B10/25

摘要： 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.

公开(公告)号：US11506033B2

公开(公告)日：2022-11-22

申请号：US17566556

申请日：2021-12-30

申请人： Southwest Petroleum University

发明人： Yang Tang ,  Haoyu Xiong ,  Guorong Wang ,  Jinzhong Wang ,  Jinhai Zhao ,  Guangjie Yuan ,  Zhidong Zhang ,  Xushen Li ,  Yufa He ,  Jie Wu ,  Xin Jing ,  Peng Zhao ,  Zeliang Li

IPC分类号： E21B43/12 ,  E21B43/04 ,  E21B43/38

摘要： 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.