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.

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

IPC: G01N33/28 ,  G01N1/38

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.

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

IPC: G01N3/08 ,  G01N33/24 ,  E21B49/02

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.

公开(公告)号：US11536125B1

公开(公告)日：2022-12-27

申请号：US17844301

申请日：2022-06-20

Applicant: Chengdu University of Technology

Inventor： Bin Yang ,  Hao Zhang ,  Yufan Guo ,  Bo Yang ,  Yin Zhong ,  Yang Yang ,  Wenjing Ma ,  Yue Li

IPC: E21B43/267 ,  B01F23/231 ,  B01F23/50 ,  E21B43/26

Abstract: The present invention discloses a method for proppant suspension and suspension parameter optimization based on bubble bridge effect, comprising: select a proppant and hydrophobically modify its surface to obtain a hydrophobically surface-modified proppant; prepare a bubbly fracturing base fluid; make the first optimization of the base fluids according to the average radius of the proppant and the average radius of the bubbles of the base fluids; optimally select the base fluids selected for the second time according to the interaction energy between the proppant particle and the bubble after the hydrophobically surface-modified proppant mixed with the base fluid; the basic parameters of the bubbly fracturing base fluid selected at the third time were used for the perfect selection for proppant suspension. The present invention establishes a procedure on experimental evaluation and parameter calculation optimization by suspending fracturing proppant with the bubble bridge effect on the hydrophobic surface.

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

IPC: G01N3/08 ,  G01N33/24 ,  E21B49/02

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.

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

IPC: G01N11/00 ,  B08B9/08 ,  G01N11/14 ,  E21B21/00

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.