Southwest Petroleum University

Southern Marine Science and Engineering Guangdong Laboratory (zhanjiang)

Other

Chengdu University of Technology

Southern Marine Science and Engineering Guangdong

Yufa He

Guorong Wang

Yang Tang

Qingyou Liu

Qingping Li

Jinhai Zhao

Jinzhong Wang

Lin Zhong

Xushen Li

Zeliang Li

Shouwei Zhou

Peng Zhao

Hexing Liu

Guangjie Yuan

Leizhen Wang

Yanjun Li

Jiang Lu

Xin Jing

Qiang Fu

Wang Li

Zhong Li

Jianglin Zhu

Xiaoyu Fang

Pu Yang

Yulin Zhang

Xiang Gao

Jun Liu

Jie Wu

Jie Wang

Haoyu Xiong

Hu Deng

Liming Fan

Rutao Ma

Chuan Wang

Xiaoqiang Guo

Chuanhua Ma

Yuan Huang

Zhidong Zhang

Shunxiao Huang

Dongqing Xia

Jiaxin Yao

Xiaolong Ma

Jianfei Wei

Anchao Wei

Wujun Tong

Miantao Guan

Linlin Zeng

Jianxun Wang

A pure electric modular subsea test tree is provided, which includes a connect-disconnect device, wherein the first channel is formed in the connect-disconnect device; the connect-disconnect device is provided with a locking assembly and a connection drive mechanism for driving the locking assembly, and the first electrical connection plug is embedded in the connect-disconnect device, and the connection drive mechanism is electrically connected with the first electrical connection plug; a shear-seal assembly, wherein a second channel communicated with the first channel is formed in the shear-seal assembly; the shear-seal assembly includes at least one shear-seal device capable of plugging the second channel; a connection part is formed on the shear-seal assembly; a heating device is arranged at one end of the shear-seal device far from the connection part. The disclosure relates to a pure electric modular subsea test tree, which has fast response speed and high operation safety.

Pure electric modular subsea test tree

The disclosure relates to an omni-directional horizontally oriented deflecting tool for a coiled tubing, which includes an inner central pipe, an outer central pipe, a conical outer cylinder, a piston outer cylinder, an anchoring mechanism, a sealing mechanism, a reversing mechanism and a steering mechanism. The anchoring mechanism includes a cone, an O-shaped sealing ring I, a cone spring, a slip, a slip spring, a slip seat, a claw I and a pin shaft I, and the sealing mechanism includes a piston, an O-shaped sealing ring II, a claw II, a pin shaft II, an upper rubber cylinder seat, a rubber cylinder, a connecting cylinder, a lower rubber cylinder seat and a gasket.

Omni-directional horizontally orientaed deflecting tool for coiled tubing

The disclosure discloses a solid fluidization tubular separator for marine natural gas hydrate, which includes a first separator and a second separator, wherein the first separator includes the first separation sleeve, the power liquid pipe, the swirl baffle, the recovery mechanism and the sand discharge mechanism. After the hydrate is sucked into the first separation sleeve to generate a circumferential velocity, so that the mud and sand with high density are separated to the pipe wall of the first separation sleeve, and the mud and sand separated to the pipe wall are settled down from the gap between the swirl baffle and the pipe wall along the pipe wall. The hydrate swirl flows into the recovery mechanism, and then leaves the first separation sleeve and enters the second separator, so as to realize the separation of mud and sand and natural gas hydrate.

Solid fluidization tubular separator for marine natural gas hydrate

The invention discloses an experimental device for natural gas hydrate solid-state fluidized mining and crushing, the experimental device comprising a power liquid supply module, a hydrate suction module, a pipeline conveying module, a hydrate fluidized crushing module, a secondary processing module and an experimental data information collection and processing module. An experimental method for the experimental device comprises: turning on the power liquid supply module, the hydrate suction module, the pipeline conveying module, the hydrate fluidized crushing module and the secondary processing module, and collecting pressure and flow data at a plurality of locations by the experimental data information collection and processing module. The present invention has the following beneficial effects: a jet solid-state fluidized mining process is simulated, and a plurality of pressure and flow detection points and sampling ports for crushed samples are provided at the same time so as to facilitate parameter collection; a plurality of component parameters are flexibly variable, including changing a drag-back speed of a moving slider, shape parameters of jet nozzles, and a pressure and flow of a power liquid; a spray head is designed to simplify the experimental device, and a dynamic process of jet crushing may be observed from a side surface of an experimental tank.

Experimental device and experimental method for natural gas hydrate solid-state fluidized mining and crushing

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

An in situ exploitation-separation-backfilling integration apparatus for natural gas hydrates is disclosed, consisting of a cyclonic suction device for coarse fraction, a jet flow device for sand discharge and a spiral cyclone device for fine fraction. The cyclonic suction device for coarse fraction is provided with a vortex trough and a cyclonic auxiliary flow channel; the jet flow device for sand discharge mainly consists of a sand discharge sliding sleeve, a sand discharge jet cylinder and a spring, wherein the sand discharge sliding sleeve can control the spraying out of hydraulic fluid and it is provided with a sand discharge butting head; inside the spiral cyclone device for fine fraction is a tapered structure and its upper portion is provided with a centering bracket.

In situ exploitation-separation-backfilling integration apparatus used for natural gas hydrates

The present invention discloses a testing device and method for simulating longitudinal-transverse-torsional coupled nonlinear vibration of a drill string in deep-water riser-free drilling. The testing device comprises a pool (), a motor () and a hook load adjustment device (), wherein a guide wheel () is provided on the top of the pool (); a support seat A () and a support seat B () are fixed on the bottom surface of the pool (); an organic glass tube () is fixed between the support seat A () and the support seat B (); a casing () is respectively provided on the top surface of the support seat B () and the top surface of the trailer (); the left end of the plastic tube () extends into the organic glass tube () along the axis of the organic glass tube (). The present invention further discloses a simulation method. The present invention has the following beneficial effects: the structure is compact; the longitudinal-transverse-torsion coupled vibration responses of the drill string under different rotating speeds of the drill string, ocean flow rates, flow rates of the drilling fluid, torsional excitations and longitudinal excitations at the bottom of the formation section is simulated, thereby filling up the blank in the riser-free drilling system.

Test device for simulating longitudinal-lateral-torsional coupled nonlinear vibration of drill string of deepwater riserless drilling and method therefor

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

The present invention provides an automatic jet breaking tool for solid fluidization exploitation of natural gas hydrate, which mainly includes an upper joint, an outer cylinder, an inner sliding sleeve, a lockup sliding sleeve, a thrust bearing, a spring, a jet joint, a telescopic jet sprinkler, a plug block and an extrusion seal ring. The present invention mainly adopts the principle of throttling control pressure to control the position of the inner sliding sleeve by controlling a flow rate of a drilling fluid, so as to turn on and turn off the jet breaking tool. The application of the present invention can realize automatic jet breaking of solid fluidization exploitation of the natural gas hydrate, reduce procedures of a round trip operation, and effectively improve the efficiency and safety of the exploitation operation of the natural gas hydrate.

Automatic jet breaking tool for solid fluidization exploitation of natural gas hydrate

Disclosed is a device for solid-state fluidized mining of natural gas hydrates in a shallow seabed, including: a sea surface support system, a pipeline delivery system, and an undersea drilling system. The sea surface support system includes a hydrate drilling vessel floating on seawater. The pipeline delivery system includes a continuous double-layer oil pipe, a recyclable conduit installed in a sediment cover, an open-hole steering packer installed outside the recyclable conduit. The undersea drilling system includes a hydrate slurry separator, a single screw pump, a hydraulic motor, a jet head and a differential pressure sliding sleeve close to the hydrate drill bit. The present invention has the following beneficial effects. The device achieves a multi-directionally horizontal drilling and production in the hydrate reservoir with a single well head, improving the drilling efficiency and single well production.

Device and method for solid-state fluidized mining of natural gas hydrates in shallow seabed

Growing community of inventors

Chengdu, China

Yufa He