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公开(公告)号：US12196725B2
公开(公告)日：2025-01-14
申请号：US18055819
申请日：2022-11-15
Applicant: SOUTHWEST PETROLEUM UNIVERSITY
Inventor： Duo Hou , Zhi Zhang , Zhongling Xiao , Huabo Yang , Jian Ren , Taihe Shi
IPC: G01N3/56 , E21B47/005 , G01N3/12 , G01N25/00
Abstract: The embodiments of the present disclosure disclose an evaluation apparatus and a method for seal integrity of a wellbore in a full life cycle. The apparatus may include an oil pipe temperature and pressure simulation assembly, an oil casing annular temperature and pressure simulation assembly, a formation confining pressure simulation assembly, a casing-cement sheath-formation combination preparation assembly, a blowby characteristic detection assembly, and a monitoring system. The present disclosure may crustal stress quickly complete scanning of cement slurry system and maintenance and preparation of casing-cement sheath-formation combination, intelligent monitor blowby pressure of cement sheath in real time, test the critical blowby pressure curve of cement sheath of oil and gas wells under various production conditions throughout the life cycle for evaluating the seal integrity of wellbore, and provide technical support for the formulation of wellbore safeguard measures.
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公开(公告)号：US11828733B2
公开(公告)日：2023-11-28
申请号：US17690018
申请日：2022-03-09
Applicant: Southwest Petroleum University
Inventor： Duo Hou , Zhongling Xiao , Zhi Zhang , Jian Ding , Jiawei Wang , Taihe Shi
IPC: G01N3/02 , G01M3/00 , G01M3/26 , G01N33/38 , E21B47/005 , E21B43/116
CPC classification number: G01N3/02 , G01M3/002 , G01M3/26 , G01N33/383 , E21B43/116 , E21B47/005
Abstract: The invention discloses a device for testing strength and sealing performance of cement sheath after perforation, comprising a cement sheath curing maintenance simulation component, a perforation operation simulation component, and a cement sheath performance test component. By simulating the detonation effect and fluid-solid coupling effect, quantitatively testing the internal transverse crack and longitudinal crack propagation size, compressive strength and tensile strength, permeability, blowby pressure, blowby velocity and other parameters of the cement sheath, drawing the relation curve between different perforation distances and the maximum blowby pressure and permeability of the cement sheath, determining the perforation distance Hp where the blowby of the cement sheath does not occur, determining the perforation distance HK to ensure the sealing of the cement sheath, and using min (Hp, HK), the critical perforation distance that the cement sheath has sufficient strength to prevent blowby and meet the sealing requirements can be determined.
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公开(公告)号：US11630043B2
公开(公告)日：2023-04-18
申请号：US17648812
申请日：2022-01-25
Applicant: SOUTHWEST PETROLEUM UNIVERSITY
Inventor： Zhi Zhang , Jie Yang , You Wu , Jian Ding , Jiawei Wang
IPC: G01N3/56
Abstract: The present disclosure provides an experimental device for simulating the erosion of a tubing string caused by sand production. The experimental device includes an autoclave, a circulating assembly, a power assembly, a monitoring assembly, or a three-phase feeding assembly. The circulating assembly is sealed and arranged in the autoclave, the circulating assembly includes a circulation loop formed by straight pipes and elbows. The power assembly includes a pump arranged on the circulation loop. The monitoring assembly includes a flowmeter and a temperature and pressure sensor for detecting the circulation loop, and the temperature and pressure sensor is communicatively connected with a PC. The three-phase feeding assembly includes a feeding pipe that is in fluid communication with the circulation loop, and the feeding pipe is connected with one or more gas tanks, a sander feeder, and one or more liquid tanks, respectively.
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公开(公告)号：US20210260547A1
公开(公告)日：2021-08-26
申请号：US17315216
申请日：2021-05-07
Applicant: Southwest Petroleum University , Engineering Technology Research lnstitute,Southwest Oil and Gas Field Company of Petro China
Inventor： Zhi Zhang , Jinming Liu , Huali Zhang , Yufei Li , Jiawei Wang , Duo Hou , Jian Ding , Yuanjin Zhao , Lin Zhang , Wei Luo , Chuanlei Wang , Pengfei Sang
Abstract: A piston pressure device includes a gas concentration-regulating piston pressure device and a high temperature autoclave. In the gas concentration-regulating piston pressure device, the proportion and concentration of corrosive gases can be accurately adjusted, intermediate gases can be stored and filled into the high temperature autoclave according to experimental needs, and an actual corrosion process in oilfield is accurately simulated. Meanwhile, the corrosive gases can be supplemented in real time during the experiment, and dynamic gas distribution in a high-temperature high-pressure corrosion experiment process is realized. The present invention has the advantages as follows: the piston pressure device is resistant to high temperature and high pressure, corrosion-resistant, simple in structure and convenient to operate; the concentration and proportion of the corrosive gases are accurately controlled to be invariable in the high-temperature high-corrosion experiment process; and reliability of high-temperature high-pressure corrosive experimental results is increased.
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公开(公告)号：US11583822B2
公开(公告)日：2023-02-21
申请号：US17315216
申请日：2021-05-07
Applicant: Southwest Petroleum University , Engineering Technology Research Institute, Southwest Oil and Gas Field Company of Petro China
Inventor： Zhi Zhang , Jinming Liu , Huali Zhang , Yufei Li , Jiawei Wang , Duo Hou , Jian Ding , Yuanjin Zhao , Lin Zhang , Wei Luo , Chuanlei Wang , Pengfei Sang
Abstract: A piston pressure device includes a gas concentration-regulating piston pressure device and a high temperature autoclave. In the gas concentration-regulating piston pressure device, the proportion and concentration of corrosive gases can be accurately adjusted, intermediate gases can be stored and filled into the high temperature autoclave according to experimental needs, and an actual corrosion process in oilfield is accurately simulated. Meanwhile, the corrosive gases can be supplemented in real time during the experiment, and dynamic gas distribution in a high-temperature high-pressure corrosion experiment process is realized. The present invention has the advantages as follows: the piston pressure device is resistant to high temperature and high pressure, corrosion-resistant, simple in structure and convenient to operate; the concentration and proportion of the corrosive gases are accurately controlled to be invariable in the high-temperature high-corrosion experiment process; and reliability of high-temperature high-pressure corrosive experimental results is increased.
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Patent Agency Ranking
公开(公告)号：US11378501B2
公开(公告)日：2022-07-05
申请号：US16828981
申请日：2020-03-25
Applicant: Southwest Petroleum University
Inventor： Zhi Zhang , Yuanjin Zhao , Duo Hou , Nan Cai , Xiankang Zhong , Pengfei Sang , Jian Ding , Jinming Liu , Jiawei Wang
Abstract: A rotary fatigue tester with complex loads includes a pump, a first motor, a second motor, a circulatory loop, an experimental kettle body, and a holding device. The experimental kettle body is a cylindrical tank, the circulatory loop is located on the experimental kettle body, a pump is located within the circulatory loop and is connected with a corrosive gas pipeline; the holding device is located within the experimental kettle body for fixing a test piece, a force-bearing pole is located at one side of the experimental kettle body for applying a shear force to the test piece, the holding device and the force-bearing pole are connected with the first motor and the second motor respectively. The rotary fatigue tester is able to simultaneously apply the axial alternating load and tangential alternating load to the test piece, for simulating the force of the test piece under complex loads.
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公开(公告)号：US20210231520A1
公开(公告)日：2021-07-29
申请号：US17229802
申请日：2021-04-13
Applicant: Southwest Petroleum University , Engineering Technology Research Institute, Southwest Oil and Gas Field Company of Petro China
Inventor： Zhi Zhang , Duo Hou , Huali Zhang , Yufei Li , You Wu , Lin Zhang , Wei Luo , Chuanlei Wang , Xiankang Zhong , Pengfei Sang
Abstract: A sealing integrity evaluation device for high-temperature and high-pressure casing-cement ring-formation and a method thereof are provided. the device includes: a high-temperature autoclave, a temperature and pressure control system, and a casing-cement-formation combination; wherein the autoclave realizes alternating temperature and pressure during the experiment; the control system monitors, controls and records the temperature and pressure data; the combination simulates a full size or a compact size casing-cement-formation of a well. Casing-cement-formation combination samples are designed and prepared by simulating working conditions such as alternating temperature, pressure, and casing internal pressure, by testing the channeling and leakage pressure of the first interface and the second interface of combination, analyzing the shape and size of the internal defects, testing the compressive strength, provided a more stable and reliable experimental method and data support for the detection of cementing sheath sealing ability and the evaluation of sealing integrity.
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公开(公告)号：US20200225135A1
公开(公告)日：2020-07-16
申请号：US16828981
申请日：2020-03-25
Applicant: Southwest Petroleum University
Inventor： Zhi Zhang , Yuanjin Zhao , Duo Hou , Nan Cai , Xiankang Zhong , Pengfei Sang , Jian Ding , Jinming Liu , Jiawei Wang
Abstract: A rotary fatigue tester with complex loads includes a pump, a first motor, a second motor, a circulatory loop, an experimental kettle body, and a holding device. The experimental kettle body is a cylindrical tank, the circulatory loop is located on the experimental kettle body, a pump is located within the circulatory loop and is connected with a corrosive gas pipeline; the holding device is located within the experimental kettle body for fixing a test piece, a force-bearing pole is located at one side of the experimental kettle body for applying a shear force to the test piece, the holding device and the force-bearing pole are connected with the first motor and the second motor respectively. The rotary fatigue tester is able to simultaneously apply the axial alternating load and tangential alternating load to the test piece, for simulating the force of the test piece under complex loads.
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9.发明公开公开(公告)号：US20230168164A1
公开(公告)日：2023-06-01
申请号：US17690018
申请日：2022-03-09
Applicant: Southwest Petroleum University
Inventor： Duo Hou , Zhongling Xiao , Zhi Zhang , Jian Ding , Jiawei Wang , Taihe Shi
CPC classification number: G01N3/02 , G01M3/002 , G01M3/26 , G01N33/383 , E21B47/005
Abstract: The invention discloses a device for testing strength and sealing performance of cement sheath after perforation, comprising a cement sheath curing maintenance simulation component, a perforation operation simulation component, and a cement sheath performance test component. By simulating the detonation effect and fluid-solid coupling effect, quantitatively testing the internal transverse crack and longitudinal crack propagation size, compressive strength and tensile strength, permeability, blowby pressure, blowby velocity and other parameters of the cement sheath, drawing the relation curve between different perforation distances and the maximum blowby pressure and permeability of the cement sheath, determining the perforation distance Hp where the blowby of the cement sheath does not occur, determining the perforation distance HK to ensure the sealing of the cement sheath, and using min (Hp, HK), the critical perforation distance that the cement sheath has sufficient strength to prevent blowby and meet the sealing requirements can be determined.
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公开(公告)号：US11624022B2
公开(公告)日：2023-04-11
申请号：US17863859
申请日：2022-07-13
Applicant: Southwest Petroleum University
Inventor： Xiankang Zhong , Haonan Li , Zhi Zhang , Junying Hu , Li Zhou , Xi Yuan , Lingjie Li
IPC: C09K8/54
Abstract: The present invention discloses a preparation method for the plant-based nano corrosion inhibition bactericide for oilfield, comprising the following steps: Step 1. Prepare the aloin liquid; Step 2. Stir the carbon nanotube, hydroxyethyl methacrylate and acrylic acid to react for 4 h at a constant temperature of 80° C. to get the carbon nanotube after fiber treatment, namely the modified carbon nanotube; Step 3. Mix the aloin liquid with imidazoline-ammonium-salt, add acetonitrile, and then add modified carbon nanotube, increase the temperature to 95° C. stir and react for 12 hours, and filter after naturally cooling down to room temperature and get the carbon nanotube loaded with bactericide; Step 4. Stir the carbon nanotube loaded with bactericide, diphenylmethane diisocyanate and polycaprolactone to react for 6 hours at a constant temperature of 95° C. and in the reaction process, continuously inject helium to get the target bactericide.
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