Patents Assigned to SOUTHWEST PETROLEUM UNIVERSITY
  • Publication number: 20240228864
    Abstract: The present invention discloses a novel high-temperature visual acid etching test device and method; the test device includes a visual rock slab holder, an acid solution storage tank I, an acid solution storage tank II, a heating apparatus, a high-pressure water pump, a low-pressure acid pump, a back-pressure valve, an acid valve A, an acid valve B, an acid valve C, an acid valve D, an acid valve E, an acid valve F, a water valve G, a water valve H, a water valve I, a water valve J, and a water valve K; both the acid solution storage tank I and the acid solution storage tank II are provided with a piston therein, where the acid solution storage tank is divided into upper and lower independent parts by the piston. According to the present invention, the flowing process of an acid solution in a fracture can be directly observed to accurately characterize the distribution of the acid solution in the fracture, which facilitates a study on an acid etching mechanism.
    Type: Application
    Filed: January 3, 2024
    Publication date: July 11, 2024
    Applicant: Southwest Petroleum University
    Inventors: Kun WANG, Shouxin WANG, Jianchun GUO, Chi CHEN, Tao ZHANG, Xiang BAI, Xinghao GOU, Jichuan REN, Cong LU, Bo GOU, Jie LAI
  • Patent number: 12024961
    Abstract: A remote intelligent active drilling pressure control system and method. The system includes a drilling pump, a rotary blowout preventer, a ground simple throttle control manifold, a wellhead back pressure compensation manifold, a graded filling device, a downhole storage-type pressure measuring device, a ground multi-parameter online monitoring system, a drilling hydraulic calculation system, an MPD intelligent control platform and a remote monitoring and control system. The present invention provides a wellbore pressure control thought of “plugging and control integration”, improves the pressure resistance of a formation by circularly plugging while drilling, realizes active control of a wellbore pressure, effectively broadens a “drilling safety density window” of the formation, and reduces the requirements on the pressure control precision of a wellbore pressure control device.
    Type: Grant
    Filed: January 9, 2023
    Date of Patent: July 2, 2024
    Assignee: SOUTHWEST PETROLEUM UNIVERSITY
    Inventors: Gao Li, Hongtao Li, Yijian Chen, Dong Xiao, Jun Jiang, Wenhe Xia, Yongjie Li
  • Publication number: 20240209733
    Abstract: The present invention discloses a method, equipment, and readable storage medium for tracking and evaluating the life cycle EUR of horizontal wells, and relates to the field of oil and gas development technology. The present invention divides the life cycle stages of fractured horizontal wells in unconventional oil and gas reservoirs, provides corresponding EUR evaluation steps for different life cycle stages based on the production performance characteristics of fractured horizontal wells in unconventional oil and gas reservoirs in the drilling and fracturing stage, extraction and testing stage, rapid production decline stage, and low pressure and small volume production stage, and establishes the EUR tracking and evaluation process of fractured horizontal wells in unconventional oil and gas reservoirs throughout their life cycle from drilling to abandonment.
    Type: Application
    Filed: July 19, 2023
    Publication date: June 27, 2024
    Applicant: Southwest Petroleum University
    Inventors: Yulong ZHAO, Xiangyu LIU, Liehui ZHANG, Xiao HE, Jianfa WU, Zhidong YANG, Jie LI, Bin ZENG, Jian ZHENG, Hongxi LI, Chengzhong BU, Jun PAN, Ruihan ZHANG, Tao ZHANG, Ye TIAN, Huiying TANG, Weihua CHEN, Haoran HU, Cheng CHANG, Deliang ZHANG
  • Patent number: 12018529
    Abstract: A spiral magnetic fluid composite sealing structure of a roller bit comprising a cone leg and a roller, wherein the roller and the cone leg are in rotatable connection in a fitting manner through a roller inner hole and a cone leg shaft journal, a sealing groove is formed in an opening end of the roller inner hole, and a spiral magnetic fluid sealing assembly is arranged in the sealing groove. Through the arrangement of the spiral magnetic fluid sealing assembly, a spiral sand discharging effect is realized, compared with a passive sealing mode, the sealing performance is greatly improved by active sand discharging mode, and the service life of sealing is significantly prolonged; a slurry sealing effect of magnetic fluid seals is realized, resulting the sealing gap is tightly sealed under the magnetic action; in addition, the automatic compensation function of magnetic fluid can also be realized.
    Type: Grant
    Filed: March 17, 2023
    Date of Patent: June 25, 2024
    Assignee: SOUTHWEST PETROLEUM UNIVERSITY
    Inventors: Yi Zhou, Fuxiao Zhang, Xinlin Lei, Ruchen Wang, Wenchao Song
  • Publication number: 20240200432
    Abstract: A method for predicting a risk of early screen-out in a near-well zone based on distributed fiber acoustic sensing (DAS) is provided.
    Type: Application
    Filed: December 15, 2023
    Publication date: June 20, 2024
    Applicant: SOUTHWEST PETROLEUM UNIVERSITY
    Inventors: Xiyu CHEN, Jingze LI, Yongming LI, Tai CHANG, Le HE, Juhui ZHU
  • Patent number: 12000767
    Abstract: The invention discloses a natural gas diffusion coefficient measurement auxiliary device based on a hand-operated lifting device, comprising a core chamber, a bracket, a core preservation device, and a hand-operated lifting device; the left side of the core chamber is connected with a methane measuring chamber, and the right side of the core chamber is connected with a nitrogen measuring chamber; a rotatable bracket is installed on the lower left side of the core chamber, and the lower right side of the core chamber is connected with the hand-operated lifting device; the core chamber is rotated by the hand-operated lifting device with the support as the center; a horizontal platform at the lower part of the core chamber is provided with a revolving door that can accommodate the left end of the core chamber; a core preservation device is installed at the lower part of the revolving door.
    Type: Grant
    Filed: May 18, 2020
    Date of Patent: June 4, 2024
    Assignee: Southwest Petroleum University
    Inventors: Shuyong Hu, Tingting Qiu, Liehui Zhang, Yulong Zhao, Huiying Tang, Xindong Wang, Nana Song, Xueqiang Guo
  • Patent number: 11993743
    Abstract: A double-chamber microcapsule includes a capsule core and a microcapsule wall encapsulating the capsule core, wherein the microcapsule wall is a thermo-sensitive polymer encapsulating the content of a second chamber; the capsule core is a pH responsive polymer encapsulating the content of a first chamber, the pH responsive polymer is obtained by polymerizing a pH responsive monomer and a cross-linking monomer; the content of the first chamber is different from the content of the second chamber, each is selected from a solid acid or a solid alkali.
    Type: Grant
    Filed: June 2, 2023
    Date of Patent: May 28, 2024
    Assignee: Southwest Petroleum University
    Inventors: Lu Liu, Xiaolin Pu
  • Patent number: 11988055
    Abstract: A controllable downhole drilling and completion tool separating device and their method of use are provided. The device includes an upper mandrel connector, an outer sleeve, a claw clamp sleeve, a claw clamp locking ring, a mandrel sleeve, a lower connector, a piston ring and a pressure bearing ball. The upper end of the lower connector is on the outer side of the upper connector in a sleeving mode. A first annular cavity is between the lower connector and the upper connector. The piston ring is on the outer side of the upper connector in a sleeving mode and located in the first annular cavity. The claw clamp sleeve and the outer sleeve are sequentially arranged on the outer side of the upper connector in a sleeving mode. A second annular cavity is communicated with the first annular cavity and formed between the claw clamp sleeve and the upper connector.
    Type: Grant
    Filed: January 3, 2023
    Date of Patent: May 21, 2024
    Assignee: SOUTHWEST PETROLEUM UNIVERSITY
    Inventors: Gao Li, Pan Fang, Dong Xiao, Hongtao Li, Xu Yang, Yongjie Li, Yangyang Xu, Guo Liu
  • Publication number: 20240159692
    Abstract: The present invention discloses a device and method for measuring the relative permeability of propped fractures in shale considering probability distribution, comprising a gas cylinder, a water pump, a booster pump, a rock slab holder, a differential pressure sensor, a directional X-ray source, an X-ray detector, an X-ray shielding box, a tee, a liquid meter, a gas meter, an electronic balance, and a vacuum pump; the inlet of rock slab holder is respectively connected with the gas cylinder and the water pump by the pipe, the outlet is connected with the liquid meter and the vacuum pump by the tee, and the differential pressure sensor is connected with both ends of the rock slab holder; the booster pump is connected with the rock slab holder by the pipe; the inlet of the gas meter is connected with the liquid meter, and the outlet is connected to the external atmosphere.
    Type: Application
    Filed: December 30, 2022
    Publication date: May 16, 2024
    Applicant: Southwest Petroleum University
    Inventors: Zhenglan LI, Yonggang DUAN, Mingqiang WEI, Quantang FANG, Le LUO, Keyi REN, Lei MENG, Shuxin LI, Zhihong NIE
  • Patent number: 11982609
    Abstract: A method for determining lower radius limit of movable throat of shale is provided, and it includes: performing a low-temperature nitrogen adsorption test on a target shale to obtain first pore radii; performing a high-pressure mercury injection test on the target shale to obtain second pore radii; performing a nuclear magnetic resonance test on the target shale to obtain third pore radii; obtaining a relationship diagram of distribution frequencies and pore radii according to three pore radii; distinguishing, according to the pore radii, relationship diagram data, and performing normalization processing to determining a relationship curve of normalized frequency data and the pore radii; and determining a lower radius limit of movable throat of shale according to relationship curve. A problem of describing characteristics of shale occurrence space with complex pore structures and strong heterogeneity is solved, the method is suitable for determining lower radius limit of movable throat of shale.
    Type: Grant
    Filed: September 28, 2023
    Date of Patent: May 14, 2024
    Assignee: Southwest Petroleum University
    Inventors: Yu Xiong, LingHong Wang, MeiHua Chen, TingTing Lei, MeiJuan Guo, HaiTao Hong, XiuQing Li, Rui Zhang
  • Patent number: 11982182
    Abstract: Methods and systems for testing retrograde condensation damage in a near well zone of a condensate gas reservoir with a high condensate content are provided. The device comprises a long rock core holder, a first two-way valve, a second two-way valve, a first single-way valve, a second single-way valve, a third single-way valve, a fourth single-way valve, a first three-way valve, a second three-way valve, a third three-way valve, a confining pressure pump, a confining pressure gauge, a vacuum pump, a high-pressure high-precision displacement pump, a first intermediate container, an outlet pressure gauge, a displacement pump, a back pressure valve, a gas meter, a second intermediate container, an inlet pressure gauge, a test tube, a constant temperature oven, a gas flowmeter, a gas chromatograph, a six-way valve, a sample preparation device, and a thermostatic chamber.
    Type: Grant
    Filed: November 29, 2023
    Date of Patent: May 14, 2024
    Assignee: SOUTHWEST PETROLEUM UNIVERSITY
    Inventors: Youwei He, Shuai Qiu, Jiazheng Qin, Yong Tang, Keji Long, Zhenhua Rui
  • Patent number: 11979506
    Abstract: In a method for statistical analysis of aggregate encrypted data with key-leakage resilience for smart grids, every user area is managed by a fog node which plays the role of data aggregation gateway and data relay. All the users' electricity consumption data sent by smart meters in the same user area are firstly aggregated by the fog node to generate a fog-level aggregate ciphertext. Then the fog node further generates a digital signature for the fog-level aggregate ciphertext and sends these data to a cloud server for long-time storage. The cloud server stores all the aggregate ciphertexts and digital signatures received from different user areas in its database, and provides data query and statistical analysis services for the control center of smart grids. On the premise of without violating users' privacy, the cloud server could provide enough information for the control center, enabling it to compute the sum, arithmetic mean and variance of all users' data in specified areas in a privacy-preserving way.
    Type: Grant
    Filed: July 14, 2020
    Date of Patent: May 7, 2024
    Assignee: SOUTHWEST PETROLEUM UNIVERSITY
    Inventors: Xiaojun Zhang, Chao Huang, Jingwei Zhang, Jie Gong, Ziyu Zhou, Shuang Zheng, Jie Zhao
  • Publication number: 20240133281
    Abstract: A calculation system for predicting a proppant embedding depth based on a shale softening effect is provided, including a sampling test terminal, a scheduling module, a monitoring module, and a calculation module, wherein the scheduling module, the monitoring module, and the calculation module are connected in communication, and the monitoring module is connected to an external operating system through a wireless network, wherein the external operating system is configured to perform a hydraulic fracturing operation and receive a first control signal and/or a second control signal from the monitoring module. The sampling test terminal is configured to test the samples and obtain test data. The scheduling module is configured to determine a target construction parameter.
    Type: Application
    Filed: December 23, 2023
    Publication date: April 25, 2024
    Applicant: SOUTHWEST PETROLEUM UNIVERSITY
    Inventors: Cong LU, Qijun ZENG, Jianchun GUO, Jiaxing LIU, Jun WU, Junkai LU, Cheng LUO, Guangqing ZHOU, Xianbo MENG, Jiandong WANG, Yanhui LIU, Xiaoshan WANG, Xin SHAN
  • Patent number: 11965389
    Abstract: A patching construction method using a hydraulic variable-grade expansion tool for blocking during drilling is provided, which includes a conversion joint, a supporting central pipe, a supporting ring, an expansion pipe, pressure gradient piston subs, double female thread connection subs, T-shaped limiting subs, a tapered centering sub, double male thread central shafts, split supporting subs, an expansion cone, a piston sub with male and female threads, a T-shaped ball compressor, a lower U-shaped pressing sleeve, a ball-seat fixing sleeve, a reciprocating spring, a sealing ball seat, a sealing ball, a tapered guide sub, etc.
    Type: Grant
    Filed: September 29, 2022
    Date of Patent: April 23, 2024
    Assignee: SOUTHWEST PETROLEUM UNIVERSITY
    Inventors: Xiaohua Zhu, Feilong Cheng, Changshuai Shi
  • Patent number: 11965412
    Abstract: A quantitative evaluation method for integrity and damage evolution of a cement sheath in an oil-gas well is provided based on a fractal theory, an image processing technology, structural features and failure mechanisms of a casing-cement sheath-formation combination. The method uses correlations among fractal dimensions of casing-cement sheath interface morphology, cement sheath microscopic pore morphology, particle morphology of an initial blank group, and macroscopic mechanical properties including a radial cementing strength of the cement sheath interface, a tensile strength, and a compressive strength to quantitatively evaluate the integrity of the cement sheath of the blank group.
    Type: Grant
    Filed: May 5, 2023
    Date of Patent: April 23, 2024
    Assignee: SOUTHWEST PETROLEUM UNIVERSITY
    Inventors: Kuanhai Deng, Niantao Zhou, Yuanhua Lin, Mingyuan Yao, Ming Zhang, Deqiang Yi, Pengfei Xie, Yang Peng
  • Publication number: 20240125959
    Abstract: A method for predicting a size range of a lost circulation channel based on deep learning (DL) is provided. The method includes the following steps: S1: acquiring data of the lost circulation channel, and establishing a prediction dataset of the size range of the lost circulation channel; S2: preprocessing the prediction dataset of the size range of the lost circulation channel, and determining the size range of the lost circulation channel; S3: establishing a prediction model for the size range of the lost circulation channel; and S4: optimizing the prediction model for the size range of the lost circulation channel, and predicting the size range of the lost circulation channel. The method overcomes the shortcomings of conventional methods, for example, the prediction value of the size of the downhole lost circulation channel is single, inaccurate and not real-time.
    Type: Application
    Filed: March 30, 2023
    Publication date: April 18, 2024
    Applicant: Southwest Petroleum University
    Inventors: Gui WANG, Rongcang FAN, Zhengguo ZHAO, Xiantao XIE, Yanjun REN, Fang LI
  • Publication number: 20240125969
    Abstract: The present disclosure provides a method for experimentally determining a critical sand-carrying gas velocity of a shale gas well. The method includes: collecting well structure and production data, calculating parameter ranges of a gas flow velocity and a liquid flow velocity; carrying out a physical simulation experiment of sand carrying in the shale gas well to obtain the sand holding capacity of the wellbore under different experimental conditions, and calculating a sand holding rate; by observing a change curve of the sand holding rate of the wellbore vs. the gas flow velocity, defining a turning point, and sensitively analyzing the influence of other experimental variables on the turning point, to calculate the critical sand-carrying production of the shale gas well under different conditions. Therefore, this calculation method is simple and applicable, and provides a theoretical basis for the optimization design of water drainage and gas production process.
    Type: Application
    Filed: December 18, 2023
    Publication date: April 18, 2024
    Applicant: Southwest Petroleum University
    Inventors: Yonghui Liu, Jinhong Jiang, Chengcheng Luo, Ning Wu, Xuanzhi Zheng, Xinke Tang, Xin Li, Zhengyang Liu, Boren Yang, Tianjian Liu
  • Patent number: 11959879
    Abstract: Disclosed is a method and device for determining characteristics of metallic casing and casing attenuation, the method includes the following steps: obtaining the ratio of first magnetic field with metallic casing and without metallic casing at DC mode; obtaining magnetic related parameter of the metallic casing; obtaining magnetic permeability of metallic casing; obtaining the ratio of second magnetic field with metallic casing and without metallic casing at AC mode; obtaining electrical related parameter of the metal casing through the ratio of the second magnetic field and the magnetic related parameter of the metal casing; obtaining electrical conductivity of metallic casing through the electrical related parameter; obtaining casing attenuation of metallic casing through the magnetic related parameter and the electrical related parameter. The beneficial effect of this disclosure is: this method can obtain characteristics and casing attenuation of metallic casing without measuring impedance.
    Type: Grant
    Filed: April 8, 2022
    Date of Patent: April 16, 2024
    Assignee: Southwest Petroleum University
    Inventor: Guozhong Gao
  • Patent number: 11946374
    Abstract: 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.
    Type: Grant
    Filed: July 5, 2023
    Date of Patent: April 2, 2024
    Assignee: Southwest Petroleum University
    Inventors: Yang Tang, Miantao Guan, Yulin Zhang, Peng Zhao, Guorong Wang, Jinhai Zhao, Qingyou Liu, Jinzhong Wang, Xiang Gao, Yufa He, Hu Deng, Liming Fan, Rutao Ma
  • Patent number: 11940367
    Abstract: A device for simulating carbon dioxide storage in a deep saline aquifer, including a CO2 gas source, first and second valves, first and second pressure pumps, first, second and third pressure gauges, a water storage tank, a simulation box, a first flow meter, a gas-liquid separator, a recycling tank, a microcomputer-display assembly, a structure plate, core holders, an injection pipeline, a connection pipeline, a baffle, a piezometer, a second flow meter, a heater, a lifter and an acoustic logging tool. The CO2 gas source, the first valve, the first pressure pump and the first pressure gauge for gas injection. The water storage tank, a second pressure pump and a second pressure gauge for water injection. The second valve, the third pressure gauge, the first flow meter, the gas-liquid separator and the recycling tank form an output pipeline.
    Type: Grant
    Filed: November 3, 2023
    Date of Patent: March 26, 2024
    Assignee: Southwest Petroleum University
    Inventors: Ping Yue, Hongnan Yang, Yuan Lei, Xu Zheng, Peng Song, Pengyu Chen, Zhouhua Wang, Simin Qu