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公开(公告)号：US11345844B2
公开(公告)日：2022-05-31
申请号：US16887336
申请日：2020-05-29
Applicant: SOUTHWEST PETROLEUM UNIVERSITY , SOUTHWEST PETROLEUM UNIVERSITY ENVIRONMENTAL PROTECTION TECHNOLOGY (CHENGDU) CO., LTD
Inventor： Xiaowei Cheng , Gaoyin Zhang , Shunxiang Luo , Zuwei Chen , Sheng Huang , Kaiqiang Liu , Chunmei Zhang , Kaiyuan Mei , Jian Liu , Zaoyuan Li , Xiaoyang Guo
Abstract: An oil well cement slurry high-temperature suspension stabilizer prepared from oil-based shale drilling cuttings is provided. The high-temperature suspension stabilizer is reasonable in principle, inexpensive and easily available in raw materials, high in product uniformity and good in chemical stability. Meanwhile, waste is changed into wealth. Therefore, the high-temperature suspension stabilizer is environment-friendly and has a broad industrial application prospect.
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公开(公告)号：US20250136860A1
公开(公告)日：2025-05-01
申请号：US19009926
申请日：2025-01-04
Applicant: Southwest Petroleum University
Inventor： Dezhi Zeng , Chengxiu Yu , Hanwen Zhang , Xi Wang , Jiancheng Luo , Chunyan Zheng , Ruikang Ke , Huan Xiao , Gang Tian
IPC: C09K8/80
Abstract: The disclosure belongs to the technical field of well completion engineering in oil and gas engineering, and particularly relates to a high-flow-conductivity proppant and its preparation method. The high-flow-conductivity proppant includes dumbbell-shaped framework granules and an oil-soluble film coating layer coated on the surfaces of the framework granules; the oil-soluble film coating layer melts when meeting oil at the temperature of 30-120° C. The high-flow-conductivity proppant prepared by the method has low bulk density, and the problems that the traditional proppant cannot be transported to the far end of a crack, has poor flow conductivity and the like can be effectively solved.
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公开(公告)号：US12180808B2
公开(公告)日：2024-12-31
申请号：US18337741
申请日：2023-06-20
Applicant: Southwest Petroleum University , Nantong Xieming Technology Co., Ltd. , Sichuan Xieming Technology Co., Ltd.
Inventor： Jialin Tian , Junyang Song , Lei Cha , Heng Li , Yanniu Ren , Chunyu Xing , Lin Yang , Long Ran
Abstract: The disclosure concerns oil drilling technology, and specifically an all-metal intelligent control motor (AMIM). The AMIM comprises an electric control module, a power module and a transmission module. The electric control module determines the axial position of the connecting rod valve through an electromagnet and controls the connection between the connecting rod valve and the piston through an electric motor. The hydraulic pressure of drilling fluid and the spring reaction force in the power module push a double worm to move axially and circumferentially under the action of internal teeth on the inner surface of shell. A one-way bearing ensures that the power module only transmits unidirectional motion. The transmission module axially limits the power module through TC bearings and transmits circumferential motion, drilling pressure and torque to the lower drilling tool. The AMIM is suitable for all kinds of deep well exploration, with a stronger drilling force, a lower cost and a higher applicability.
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公开(公告)号：US12153004B1
公开(公告)日：2024-11-26
申请号：US18818596
申请日：2024-08-29
Applicant: Southwest Petroleum University , Sichuan Hengyi Petroleum Technology Services Co., Ltd , Shale Gas Research Institute, PetroChina Southwest Oil and Gas Field Company
Inventor： Xinyang He , Kun Zhang , Chengzao Jia , Yan Song , Hulin Niu , Jing Li , Yijia Wu , Jiayi Liu , Bo Li , Yiming Yang , Liang Xu , Yongyang Liu , Jia He , Jiajie Wu , Zhi Gao , Tian Tang , Cheng Yang , Lei Chen , Xuefei Yang , Fengli Han , Xueying Wang , Weishi Tang , Jingru Ruan , Hengfeng Gou , Lintao Li , Yipeng Liu , Ping Liu
Abstract: A method for calculating a surface relaxation rate of a shale includes: a relaxation time T distribution curve and a pore throat radius r distribution curve are obtained through experiments; abscissas of the two distribution curves are standardized, and the abscissa of the relaxation time T distribution curve is expanded or shrunk to ensure an abscissa value corresponding to a maximum ordinate value in the transformed relaxation time T distribution curve is same as an abscissa value corresponding to a maximum ordinate value in the pore throat radius r distribution curve; straight lines with a number of N parallel to a y-axis of a combined curve graph including the two distribution curves are drawn and a ρ value corresponding to each straight line is calculated; and ρ value with the number of N are processed to obtain a final surface relaxation rate ρ′.
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公开(公告)号：US12146374B2
公开(公告)日：2024-11-19
申请号：US18159192
申请日：2023-01-25
Applicant: SOUTHWEST PETROLEUM UNIVERSITY
Inventor： Hongtao Li , Gao Li , Jun Jiang , Wenhe Xia , Xu Yang
Abstract: The present invention discloses an active intelligent wellbore pressure control system, which includes a ground multi-parameter online monitoring system (86), a rotary blowout preventer (1), a wellhead back pressure compensation manifold, an automatic plugging material filling device (62), a drilling device, an MPD intelligent control system (87), a remote monitoring and control system (88), and a high-precision hydraulic calculation system (105). 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, reduces the requirements on the pressure control precision of a wellbore pressure control device, solves the problem that a conventional MPD technology cannot deal with the situation that the “drilling safety density window” of the formation is extremely narrow or even zero, and expands the application range of the MPD technology.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20240368988A1
公开(公告)日：2024-11-07
申请号：US18616109
申请日：2024-03-25
Applicant: Southwest Petroleum University
Inventor： Feng Wu , Chunchao Chen , Ao Wang , Yujing Long , Siyuan Chen , Yingying Luo
Abstract: Disclosed is a calculation method for a mobile fluid saturation after reservoir fracturing based on netting analysis, including: performing a fracturing experiment and micro-computed tomography (CT) experiment designs before and after fracturing; dividing a pore development area and a dense area; comparing micro-CT scanning experimental images of the same reservoir core sample before and after fracturing, and dividing a fracture network formed after fracturing; analyzing the propagation of fracturing fractures by netting analysis; determining a porosity of fracturing reconstruction; further determining a mobile fluid saturation after fracturing; and combining with a logging curve to realize the continuous calculation of mobile fluid saturation after fracturing. According to the present disclosure, on the basis of micro-CT scanning data before and after fracturing, the mobile fluid saturation after fracturing is quantitatively calculated by netting analysis and logging curves to cause the evaluation of the mobile fluid saturation after fracturing to be more accurate.
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7.发明公开公开(公告)号：US20240353389A1
公开(公告)日：2024-10-24
申请号：US18346259
申请日：2023-07-02
Applicant: Southwest Petroleum University
Inventor： Jie ZHANG , Xuefeng SUN , Qiulai XUE , Cuinan LI , Qiang WEI , Zhilin LI , Mubai DUAN , Xianjie HE
CPC classification number: G01N33/2841 , G01N13/00 , G01N33/2823
Abstract: Disclosed is an experimental device and method for solubility determination of methane in oil-based drilling fluid, comprising a pressure-resistant gas chamber and an equilibrium still both arranged in a constant-temperature oil bath heating oven, a gas booster pump, and a vacuum system used for vacuuming the pressure-resistant gas chamber and the equilibrium still, and a data acquisition device for collecting temperature and pressure signals; the gas booster pump is connected to drive air source inlet, a gas check valve is arranged on the pipe between the pressure-resistant gas chamber and the gas booster pump that is also connected with a high-pressure gas cylinder, the equilibrium still is divided into a dissolution equilibrium chamber at the top and a hydraulic oil chamber at the bottom by a high-pressure dynamic seal structure, the dissolution equilibrium chamber is connected to a liquid inlet funnel through the fourth globe valve.
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8.发明公开公开(公告)号：US20240344428A1
公开(公告)日：2024-10-17
申请号：US18412729
申请日：2024-01-15
Applicant: Southwest Petroleum University
Inventor： Cheng CAO , Zehao XIE , Liehui ZHANG , Yulong ZHAO , Shaomu WEN , Xian PENG , Longxin LI , Ye TIAN , Xiang ZHOU
CPC classification number: E21B41/0064 , E21B43/30 , E21B2200/20
Abstract: An optimized design method and system for carbon dioxide geological storage parameters of a depleted gas reservoir is provided, including: collecting data of a depleted gas reservoir in which carbon dioxide geological storage is to be carried out, and establishing a numerical simulation model of the depleted gas reservoir; carrying out fitting of production performance history to obtain current state information; simulating and predicting production performance data after carbon dioxide injection into depleted oil and gas reservoirs under different combinations of well pattern parameters and injection parameters using a numerical simulation technology; calculating a parameter value representing a uniform pressure rise according to the production performance data; updating well pattern parameters and injection parameters using a genetic algorithm; repeating above steps until an iterative convergence condition is met; and determining an optimal combination of carbon dioxide injection process parameters according to an output optimal target value.
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9.发明授权公开(公告)号：US12116891B1
公开(公告)日：2024-10-15
申请号：US18616109
申请日：2024-03-25
Applicant: Southwest Petroleum University
Inventor： Feng Wu , Chunchao Chen , Ao Wang , Yujing Long , Siyuan Chen , Yingying Luo
CPC classification number: E21B49/088 , E21B43/26 , E21B2200/20
Abstract: Disclosed is a calculation method for a mobile fluid saturation after reservoir fracturing based on netting analysis, including: performing a fracturing experiment and micro-computed tomography (CT) experiment designs before and after fracturing; dividing a pore development area and a dense area; comparing micro-CT scanning experimental images of the same reservoir core sample before and after fracturing, and dividing a fracture network formed after fracturing; analyzing the propagation of fracturing fractures by netting analysis; determining a porosity of fracturing reconstruction; further determining a mobile fluid saturation after fracturing; and combining with a logging curve to realize the continuous calculation of mobile fluid saturation after fracturing. According to the present disclosure, on the basis of micro-CT scanning data before and after fracturing, the mobile fluid saturation after fracturing is quantitatively calculated by netting analysis and logging curves to cause the evaluation of the mobile fluid saturation after fracturing to be more accurate.
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公开(公告)号：US20240337157A1
公开(公告)日：2024-10-10
申请号：US18600875
申请日：2024-03-11
Applicant: Southwest petroleum university
Inventor： Xiaohua Zhu , Weiji Liu , Yaojie Cheng
Abstract: A valve-controlled high-energy hydrostatic down-the-hole (DTH) impact hammer is provided, including an upper joint, a shell, a drainage device, an upper fixed valve sleeve, a lower fixed valve sleeve, a main valve, a piston hammer, a supporting sleeve, a sealing piston, a guiding sleeve, a stop ring, a fixing casing pipe, and a drilling bit. The impact hammer is internally defined with a first chamber, a second chamber, a third chamber and a pressure relief chamber. The first chamber is responsible for providing drilling fluid to move the piston hammer up and down by realizing the pressure change of the drilling fluid in the second and third chambers through the holes and flow channels in the upper and lower fixed valve sleeves. The impact hammer transfers the main pressure relief mode from the axis of the impact hammer to the pressure relief chamber between the supporting sleeve and the shell.
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