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：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：US12292411B2

公开(公告)日：2025-05-06

申请号：US18888210

申请日：2024-09-18

Applicant: Chengdu University Of Technology

Inventor： Jiping She ,  Yunfei Wang ,  Furong Gong ,  Wenjing Ma ,  Shiyu Zhang ,  Gege Teng ,  Huimin Li

IPC: G01N3/02 ,  G01N33/24

Abstract: The provided are a device and method for measuring a bonding strength between a contaminated rock surface and a solidified material. The device includes a fixing and measuring assembly and four rock slabs enclosing a rectangular prism, where outer surfaces of the four rock slabs are fitted to two transverse support plates and two longitudinal support plates, respectively; the two longitudinal support plates are arranged between the two transverse support plates; upper and lower ends of the rock slabs are provided with an upper cover and a bottom plate, respectively; the upper cover and the bottom plate are detachably fixed to the two transverse support plates, respectively; the two transverse support plates are detachably fixed to each other through a second screw; a hydraulic device is provided among the four posts; and a movable end of the hydraulic device is provided with a supporting airbag.

公开(公告)号：US12263453B1

公开(公告)日：2025-04-01

申请号：US18897048

申请日：2024-09-26

Applicant: Chengdu University Of Technology

Inventor： Jiping She ,  Wenjing Ma ,  Furong Gong ,  Yunfei Wang ,  Gege Teng ,  Shiyu Zhang ,  Huimin Li

IPC: B01F23/00 ,  B01F23/50 ,  B01F23/53 ,  B01F27/90 ,  B01F29/83 ,  B01F35/212 ,  B01F35/22 ,  B01F35/31 ,  B01F35/32 ,  B01F35/33 ,  C09K8/50 ,  B01F35/30 ,  B01F101/49 ,  E21B41/00

Abstract: The provided are a thickening device and method for uniform solidification of composite lost circulation material made up of liquid and granular lost circulation materials. The thickening device includes a base. The base is provided with a side wall; an upper end of the side wall is provided with a detachable top cover; the base, the side wall, and the top cover form a sealed chamber; the base is provided with a rotating support platform; the rotating support platform is provided with a detachable slurry cup; the slurry cup is provided therein with agitating shafts; the agitating shafts each are provided with a blade; a top end of the agitating shaft is connected to a threaded rod through a ball head connector; an upper end of the agitating shaft is provided with a second gear, and the threaded rod is provided with a second limit platform.

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.