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Patent Agency Ranking
公开(公告)号：US20210116341A1
公开(公告)日：2021-04-22
申请号：US17137388
申请日：2020-12-30
Applicant: Chengdu University of Technology
Inventor： Hao Zhang , Bin Yang , Ying Zhong , Yang Yang , Jiping She , Guanchang Pan , Kun Chang , Xinyang Wang
Abstract: The invention discloses an experimental test method for subcritical propagation rate of rock fractures based on triaxial stress-strain curve, including: Step 1: preparing test sample core for experiment; Step 2: putting core into triaxial rock mechanics test system, applying constant radial confining pressure to core, and applying axial stress in the axial direction until the core is macroscopically damaged; recording experimental parameters of axial stress, strain and corresponding loading time of the core; Step 3: drawing stress-strain curve of the test core according to detection data points of axial stress and axial strain; Step 4: in the stress-strain curve of the test core, starting time and ending time of the subcritical propagation stage of fractures inside the core correspond to the initiation stress σci and damage stress σcd, respectively, and calculating subcritical propagation rate of the subcritical fracture propagation stage of the test core.
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公开(公告)号：US11912933B1
公开(公告)日：2024-02-27
申请号：US18495788
申请日：2023-10-27
Applicant: Chengdu University of Technology
Inventor： Bo Yang , Yu Liu , Hao Zhang , Di Yang , Min Ren , Yang Yang , Ying Zhong , Bin Yang , Jiping She
IPC: C09K8/60
CPC classification number: C09K8/602
Abstract: The invention provides a suspension modifier directly added into fracturing fluid for real-time proppant modification during fracturing and the application thereof, relating to the field of oil and gas production technologies. The suspension modifier is a controlled release nanoemulsion and comprises surface hydrophobic modifier, surfactant, cosurfactant and water. The suspension modifier is directly added into clear-water or active-water fracturing fluid while the proppant is added into water. After stirring, the suspension modifier is capable of self-assembling and being adsorbed on the proppant surface, so that the proppant surface becomes hydrophobic and aerophilic. The invention no longer requires the proppant to be pretreated, and the bubble-suspended proppant can be obtained directly by adding the suspension modifier to the clear-water or active-water fracturing fluid, and meanwhile adding the proppant to the fracturing fluid. This technology is not only easy to operate, but also low in cost for proppant treatment.
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公开(公告)号：US11650194B2
公开(公告)日：2023-05-16
申请号：US17647599
申请日：2022-01-11
Applicant: Chengdu University of Technology
Inventor： Jiping She , Hao Zhang , Bin Yang , Yang Yang , Yang Li , Jianjun Ni , Gege Teng , Ying Zhong
CPC classification number: G01N33/2823 , G01N1/38
Abstract: A dynamic damage evaluation instrument of drilling fluid based on a glass core includes a controller and a support. A kettle body is provided on the support, a well for receiving drilling fluid is provided inside the kettle body, and a well cover is provided at an upper end of the kettle body. A core holding assembly communicating with the well is provided at a side of the kettle body, and a metering assembly is movably provided at the other end of the core holding assembly. A stirrer for stirring drilling fluid is provided inside the well, and a power component for driving the stirrer is provided outside the kettle body. A data detection hole for mounting a temperature and pressure sensor and a pressurization hole for mounting a pressurization device are formed on the well cover.
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公开(公告)号：US10989639B1
公开(公告)日：2021-04-27
申请号：US17137388
申请日：2020-12-30
Applicant: Chengdu University of Technology
Inventor： Hao Zhang , Bin Yang , Ying Zhong , Yang Yang , Jiping She , Guanchang Pan , Kun Chang , Xinyang Wang
Abstract: The invention discloses an experimental test method for subcritical propagation rate of rock fractures based on triaxial stress-strain curve, including: Step 1: preparing test sample core for experiment; Step 2: putting core into triaxial rock mechanics test system, applying constant radial confining pressure to core, and applying axial stress in the axial direction until the core is macroscopically damaged; recording experimental parameters of axial stress, strain and corresponding loading time of the core; Step 3: drawing stress-strain curve of the test core according to detection data points of axial stress and axial strain; Step 4: in the stress-strain curve of the test core, starting time and ending time of the subcritical propagation stage of fractures inside the core correspond to the initiation stress σci and damage stress σcd, respectively, and calculating subcritical propagation rate of the subcritical fracture propagation stage of the test core.
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公开(公告)号：US12000766B2
公开(公告)日：2024-06-04
申请号：US17671607
申请日：2022-02-15
Applicant: Chengdu University of Technology
Inventor： Jiping She , Hao Zhang , Yang Yang , Bin Yang , Yang Li , Jianjun Ni , Shiyu Zhang , Ying Zhong
CPC classification number: G01N11/14 , B08B9/0808 , B08B2209/08 , E21B21/003 , G01N2011/0006
Abstract: An automatically-cleanable thickening performance evaluation instrument for drilling LCMs includes a cleaning device, a kettle body, a thickening motor, a heating component, a test ending component, a top cover, and a bottom cover, where upper and lower ends of the kettle body are both opened; the kettle body is arranged in a third bearing inner race, a third bearing outer race is connected to a first limb, and the first limb is configured to limit a position of the kettle body; and the kettle body is detachably connected to the thickening motor and driven by the thickening motor to rotate. The instrument can realize electric heating and air pressurization to simulate the underground environment, and the kettle body can be completely sealed, such that a measured thickening time is close to an actual thickening time. Moreover, the instrument can be automatically cleaned at the end of a test.
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