Patents Assigned to PetroChina Company Limited
  • Patent number: 11926787
    Abstract: A well cementing method is described for improving cementing quality by controlling the hydration heat of cement slurry. By controlling the degree and/or rate of hydration heat release from cement slurry, the method improves the hydration heat release during formation of cement with curing of cement slurry, improves the binding quality between the cement and the interfaces, and in turn improves the cementing quality at the open hole section and/or the overlap section. The cementing method improves cementing quality of oil and gas wells and reduces the risk of annular pressure.
    Type: Grant
    Filed: April 21, 2020
    Date of Patent: March 12, 2024
    Assignees: PetroChina Company Limited, CNPC Engineering Technology R&D Company Limited
    Inventors: Shuoqiong Liu, Hua Zhang, Jianzhou Jin, Ming Xu, Yongjin Yu, Fengzhong Qi, Congfeng Qu, Hong Yue, Youcheng Zheng, Wei Li, Yong Ma, Youzhi Zheng, Zhao Huang, Jinping Yuan, Zhiwei Ding, Chongfeng Zhou, Chi Zhang, Zishuai Liu, Hongfei Ji, Yuchao Guo, Xiujian Xia, Yong Li, Jiyun Shen, Huiting Liu, Yusi Feng, Bin Lyu
  • Patent number: 11858827
    Abstract: A preparation method of a nanotube hierarchically structured lithium titanate includes the steps of: S1. dispersing a titanium source into an aqueous solution containing lithium hydroxide and hydrogen peroxide and stirring to obtain a mixed solution; S2. subjecting the mixed solution obtained in step S1 to a reaction by heating to obtain a precursor having a nanowire-like structure; S3. subjecting the precursor having a nanowire-like structure obtained in step S2 to separation and drying; S4. subjecting the precursor having a nanowire-like structure after separation and drying to a low-temperature annealing treatment; S5. subjecting the precursor having a nanowire-like structure after the low-temperature annealing treatment to a liquid thermal reaction to obtain the nanotube hierarchically structured lithium titanate. The method includes a simple process and easily controllable process parameters, and may be easily scaled-up for industrial production.
    Type: Grant
    Filed: August 29, 2019
    Date of Patent: January 2, 2024
    Assignee: PETROCHINA COMPANY LIMITED
    Inventors: Xu Jin, Jianming Li, He Liu, Hang Jiao, Xiaoqi Wang, Liang Sun, Xiaodan Liu
  • Patent number: 11802233
    Abstract: A permeability-enhancing flooding system for tight oil reservoirs and preparation and use thereof are disclosed. The permeability-enhancing flooding system is present in a state of oil-in-water droplet and composed of a surfactant, an oil-soluble substance and water, and has an outer phase that is an aqueous solution containing the surfactant, and an inner phase that is the oil-soluble substance; and the surfactant comprises one of nonionic gemini surfactants and anionic gemini surfactants, or a combination of two or more thereof. The preparation process for the permeability-enhancing flooding system is simple to operate, suitable for industrialized production, and low in overall cost, and has obvious application prospects in the field of tight oil reservoirs for an enhanced oil recovery.
    Type: Grant
    Filed: October 29, 2020
    Date of Patent: October 31, 2023
    Assignee: PetroChina Company Limited
    Inventors: Bin Ding, Chunming Xiong, Xiangfei Geng, Baoshan Guan, Falin Wei, Jingjun Pan, Baocheng Wu, Jingfeng Dong, Youguo Yan
  • Publication number: 20230220755
    Abstract: Provided is a method and apparatus for predicting oil and gas yields in in-situ oil shale exploitation, the method includes: acquiring an original TOC value, a Ro value and an original HI value of a shale to be measured; and obtaining oil and gas yields in in-situ exploitation of the shale based on the original TOC value, Ro value, original HI value thereof and pre-established models for predicting oil and gas yields in in-situ oil shale exploitation, the models are pre-established based on oil and gas yield data obtained by performing a thermal simulation experiment on a plurality of different shale samples, and the original TOC value, Ro value and original HI value thereof. The above technical solution achieves a quantitative prediction of oil and gas yields in in-situ oil shale exploitation, and improves the accuracy and efficiency of prediction of oil and gas yields in in-situ oil shale exploitation.
    Type: Application
    Filed: February 24, 2020
    Publication date: July 13, 2023
    Applicant: PetroChina Company Limited
    Inventors: Lianhua HOU, Jinhua FU, Jinghong WANG, Xianyang LIU, Zhongying ZHAO
  • Patent number: 11692426
    Abstract: The invention provides a method and an apparatus for determining an integrated exploitation approach for a shale and adjacent oil reservoirs. The method includes: determining a thickness of an effective shale, a top effective boundary and a bottom effective boundary of adjacent effective oil reservoirs; determining a maximum seepage radius of each of the adjacent effective oil reservoirs to the effective shale; determining a well pattern; determining a well completion approach; and determining a total number of perforation clusters of gas injection wells, a number of perforation clusters corresponding to each of the adjacent effective oil reservoirs, a gas injection amount per unit time of each of the perforation clusters, and a total gas injection amount per unit time of the gas injection wells. The effective shale is in communication with all the adjacent effective oil reservoirs by boring-through of a fluctuating horizontal well or a vertical well.
    Type: Grant
    Filed: February 24, 2020
    Date of Patent: July 4, 2023
    Assignee: PetroChina Company Limited
    Inventors: Lianhua Hou, Jinghong Wang, Weijie Hou, Ziyun Zhang, Futai Jing
  • Patent number: 11634961
    Abstract: A metal-based dissolvable ball seat comprises a mandrel, a tail base, a sliding body, a slip and a sealing ring. The mandrel can be disengaged from the tail base under predefined shearing force. The sliding body is disposed to sleeve the mandrel and located above the tail base; the slip is disposed outside the mandrel and slidably abutted against the tail base and the sliding body respectively; the slip and the sliding body are slidably abutted against each other through a first conical surface structure, and/or the slip and the tail base are slidably abutted against each other through a second conical surface structure; the sealing ring is movable along axial direction of the mandrel together with the slip; when the sliding body and the tail base are approaching each other, the slip opens up and the sealing ring expands outward. A setting system and a setting method are provided.
    Type: Grant
    Filed: September 30, 2020
    Date of Patent: April 25, 2023
    Assignee: PetroChina Company Limited
    Inventors: Xiaowei Xue, Jianguo Yao, Zhiguo Wang, Guofu Ren, Xiangjun Hu, Siwen Guo, Minqi Zhao, Changqing Feng, Kai Li, Penggang Huang
  • Patent number: 11629283
    Abstract: The present invention discloses a N,N,N?,N?-tetradodecyl-substituted diphenyl ether sulfonate anionic Gemini surfactant and the synthesis method thereof. It has a structural formula of: and is prepared in a two-step reaction comprising: S1. subjecting 4,4?-diaminodiphenyl ether and bromododecane to an amine alkylation reaction to obtain N,N,N?,N?-tetradodecyl-substituted diphenyl ether; and S2. sulfonating the N,N,N?,N?-tetradodecyl-substituted diphenyl ether with concentrated sulfuric acid to produce the target product, N,N,N?,N?-tetradodecyl-substituted diphenyl ether sulfonate. The surfactant of the present invention has a high surface activity and can be synthesized with a simple procedure under mild reaction conditions, and can be easily separated and purified.
    Type: Grant
    Filed: November 22, 2019
    Date of Patent: April 18, 2023
    Assignee: PetroChina Company Limited
    Inventors: Xiangfei Geng, Bin Ding, Jianhui Luo, Bo Huang, Jianyong Xie, Pingmei Wang, Yang Gao, Baoliang Peng
  • Patent number: 11565944
    Abstract: A process for preparing a titanic acid salt, titanic acid, and titanium oxide having a controllable particle size and a hierarchical structure, wherein the process includes the steps of: preparing a titanium-containing peroxo-complex solution; adding a basic metal compound to the titanium-containing peroxo-complex solution to form a mixture solution; adding one of polyvinyl alcohol, hydroxypropyl methyl cellulose, and polyethylene glycol to the mixture solution to form a precursor dispersion; and subjecting the precursor dispersion to a solvothermal reaction to obtain the titanic acid salt having a hierarchical structure. The process for preparing a titanic acid salt, titanic acid, and titanium oxide having a controllable particle size and a hierarchical structure, can not only realize the regulation of morphology and particle diameter of constituent units in the hierarchical structure, but also can achieve the regulation of particle size in the hierarchical structure.
    Type: Grant
    Filed: August 29, 2019
    Date of Patent: January 31, 2023
    Assignee: PETROCHINA COMPANY LIMITED
    Inventors: Jianming Li, Xu Jin, He Liu, Xiaodan Liu, Xiaoqi Wang, Liang Sun
  • Patent number: 11554966
    Abstract: The present invention provides a nanostructured titanic acid salt and a preparation process and use thereof. The process comprises preparing a dispersion containing titanium peroxy complex; slowly adding a metal compound to the dispersion containing the titanium peroxy complex to form a solution; adding an alcohol to the solution under normal temperature and normal pressure to produce the nanostructured titanic acid salt precursor precipitate in the solution, and separating the precipitate to obtain the titanic acid salt precursor; drying the precursor, and then heat treating it to obtain the nanostructured titanic acid salt product. The present invention provides a process for preparing a titanic acid salt with simple preparation process, easy control for process parameters and easy large-scale industrial production.
    Type: Grant
    Filed: August 29, 2019
    Date of Patent: January 17, 2023
    Assignee: PetroChina Company Limited
    Inventors: Xu Jin, Jianming Li, Xiaoqi Wang, Hang Jiao, Liang Sun, Xiaodan Liu
  • Patent number: 11535638
    Abstract: The present disclosure discloses an arylaminosilane compound, a propylene polymerization catalyst and preparation thereof. The arylaminosilane compound has a structure of wherein R1 is a C1-C8 alkyl group or a C1-C8 silanyl group; R2, R3, R4, R5 and R6 are each independently H or a C1-C12 alkyl group; R7, R8 and R9 are each independently a C1-C8 alkyl group or a C1-C8 alkoxy group. When the arylaminosilane compound is used as an external electron donor of a propylene polymerization catalyst in propylene polymerization reaction, the catalyst has good hydrogen response.
    Type: Grant
    Filed: April 8, 2020
    Date of Patent: December 27, 2022
    Assignee: PETROCHINA COMPANY LIMITED
    Inventors: Jianjun Yi, Liang Cui, Xilai Zhang, Junyu Lei, Haijun Hao, Shisheng Zhao, Kefeng Wang, Junpeng Zhuang, Shenghui Zhang
  • Patent number: 11531130
    Abstract: There is disclosed in the present disclosure a seismic full horizon tracking method, a computer device and a computer-readable storage medium. The method includes: acquiring three-dimensional seismic data; extracting horizon extreme points from the three-dimensional seismic data to construct a sample space; equally dividing the sample space into a plurality of sub-spaces with overlapping portions, and performing a clustering process on the horizon extreme points in each sub-space to obtain horizon fragments corresponding to each horizon of the three-dimensional seismic data; establishing a topological consistency between the horizon fragments; and fusing the horizon fragments corresponding to each horizon of the three-dimensional seismic data based on the topological consistency, to obtain a full horizon tracking result of the three-dimensional seismic data.
    Type: Grant
    Filed: April 8, 2020
    Date of Patent: December 20, 2022
    Assignee: PETROCHINA COMPANY LIMITED
    Inventors: Mingjun Su, Zhong Hong, Qingyun Han, Tao Deng, Xiangli Cui, Feng Qian, Guangmin Hu, Yunze Xu
  • Patent number: 11505734
    Abstract: A nonionic Gemini surfactant, (octylphenol polyoxyethylene ether disubstituted) dicarboxylic acid diphenyl ether has a structural formula of: and is prepared by a two-step reaction: S1, diphenyl ether 4,4?-dicarboxylic acid is subjected to an acyl chlorination reaction to obtain diphenyl ether 4,4?-dicarbonyl dichloride; S2, diphenyl ether 4,4?-dicarbonyl dichloride is subjected to an esterification reaction with octylphenol polyoxyethylene ether (OP-10) to obtain the target product (octylphenol polyoxyethylene ether disubstituted) dicarboxylic acid diphenyl ether. The surfactant is expected to be applied in tertiary oil recovery as an alkali/surfactant, in polymer/surfactant binary composite flooding, in alkali/surfactant/polymer ternary composite flooding, as a microemulsion emulsifier and the like, and it can also be compounded with a common surfactant to reduce the use cost, and thus create conditions for its large-scale application.
    Type: Grant
    Filed: November 22, 2019
    Date of Patent: November 22, 2022
    Assignee: PetroChina Company Limited
    Inventors: Xiangfei Geng, Bin Ding, Jianhui Luo, Bo Huang, Jianyong Xie, Pingmei Wang, Yongcan Peng, Baoliang Peng
  • Patent number: 11428065
    Abstract: A method and an apparatus for oil production by increasing resistance of borehole wall for improving an energy utilization rate of injection gas includes injecting gas into an oil reservoir so that a gas pressure in the oil reservoir reaches an initial oil reservoir pressure. The initial oil seepage pressure is present at a position where the inside of the production well is in communication with the oil reservoir. The initial oil seepage pressure is less than the initial oil reservoir pressure. The method also includes monitoring gas production and oil production of the production well and increasing the initial oil seepage pressure to an increased oil seepage pressure when a ratio of the gas production to the oil production is higher than a predetermined ratio. The increased oil seepage pressure is smaller than the initial oil reservoir pressure.
    Type: Grant
    Filed: March 20, 2020
    Date of Patent: August 30, 2022
    Assignee: Petrochina Company Limited
    Inventors: Xinglong Chen, Qingxin Song, Zhidong Yang, Shanyan Zhang, Zemin Ji, Yulong Pu
  • Patent number: 11414511
    Abstract: The invention discloses a carboxymethyl inulin graft polymer scale and corrosion inhibitor and a preparation method thereof. The main chain of the carboxymethyl inulin graft polymer scale and corrosion inhibitor consists of the following repeating unit (I): in the repeating unit (I), x:y=(20˜80):(20˜80); the range of z is from 2 to 70, the degree of carboxymethyl substitution is from 1.5 to 2.5. The beneficial effect of the technical scheme proposed in the present invention is: it has excellent scale inhibition and corrosion inhibition properties; the monomers are cheap and easily available; the reaction conditions are mild and easy to control; at the same time, the monomer raw materials don't contain phosphorus and nitrogen, and are environmentally friendly.
    Type: Grant
    Filed: April 30, 2020
    Date of Patent: August 16, 2022
    Assignees: YANGTZE UNIVERSITY, PETROCHINA COMPANY LIMITED
    Inventors: Weichu Yu, Aibin Wu, Jingfeng Dong, Zhenhu Lyu, Zhichen Wang, Fengjuan Zhang
  • Patent number: 11415721
    Abstract: The present disclosure discloses a resistivity measurement method, device and system. The method comprises: placing a core to be measured into the core holder after a 100% saturated water treatment, and injecting a predetermined confining pressure by the confining pressure pump; turning on the displacement source to carry out a displacement, and at an interval of a predetermined time period, acquiring a current value by the ammeter and a voltage value by the voltmeter; determining a resistivity of the core according to the current value, the voltage value, an arc length of the curved electrode, and a radius and a length of the core. The present disclosure can realize a rock resistivity measurement in a vertical direction under formation conditions for a plunger-type core, without needing to change the core preparation technology or method.
    Type: Grant
    Filed: May 31, 2019
    Date of Patent: August 16, 2022
    Assignees: PetroChina Company Limited, Sichuan Kelite Oil and Gas Technology Co. Ltd
    Inventors: Jiahuan He, Keming Zhou, Li Zeng, Yong Duan, Nong Li, Fusen Xiao, Hongbin Chen, Huajie Yu, Chunyan Zou
  • Patent number: 11402530
    Abstract: The embodiments of the present application disclose a method for acquiring a converted wave, an electronic device, and a readable storage medium, wherein the method for acquiring a converted wave comprises: acquiring a relational expression between a P-wave reflection coefficient and an incident angle by Zoeppritz equation; simplifying the relational expression between the P-wave reflection coefficient and the incident angle; calculating a derivative for the simplified relational expression between the P-wave reflection coefficient and the incident angle, to obtain an expression of a wave to be converted; correcting parameters in the expression of the wave to be converted to obtain a converted wave.
    Type: Grant
    Filed: May 20, 2019
    Date of Patent: August 2, 2022
    Assignee: PetroChina Company Limited
    Inventors: Jianhu Gao, Shengjun Li, Xueshan Yong, Shian Shen, Bingyang Liu, Jinyong Gui
  • Patent number: 11387452
    Abstract: The present invention provides a linear porous lithium titanate material, preparation and product thereof. The material comprises a lithium titanate material having a crystal phase which is a spinel type, wherein the lithium titanate material has a linear structure having an aspect ratio of greater than 10, and the linear lithium titanate material has a porous structure; wherein the linear porous lithium titanate material has a structure composed of a plurality of particles having an oriented growth direction. The material has a long-axis structure which facilitates the effective migration of electrons, a porous structure which facilitates the rapid intercalation and deintercalation process of lithium ions, sodium ions or potassium ions, and a large specific surface area which facilitates the contact area between the electrolyte solution and the electrodes and reduces the current density, thus is excellent in a rapid charge-discharge performance of the battery.
    Type: Grant
    Filed: August 30, 2019
    Date of Patent: July 12, 2022
    Assignee: PetroChina Company Limited
    Inventors: Jianming Li, Xu Jin, He Liu, Xiaoqi Wang, Xiaodan Liu, Hang Jiao
  • Patent number: 11377941
    Abstract: A gasflow distribution device includes an outer pipe, a gland, a filter screen, and a filling block with a pore structure. The outer pipe is a hollow outer pipe, used for placing the filling block, with an open upper end and a lower end with a bottom of which the center part is provided with a bottom hole, wherein the filling block is sealed to an inner wall of the outer pipe. The gland has a bottom end provided with a circular groove for setting the filter screen, and a top end distributed evenly with a plurality of top holes through the gland. The gland is connected to the outer pipe. The device can distribute gasflow proportionally, and can be used for separate-layer gas injection.
    Type: Grant
    Filed: April 15, 2020
    Date of Patent: July 5, 2022
    Assignee: PETROCHINA COMPANY LIMITED
    Inventors: Xinglong Chen, Jingyao Wang, Chengming Zhang, Shitou Wang, Jiazhong Wu, Zhong Ren
  • Patent number: 11353442
    Abstract: The invention provides a physical simulation experimental device and method for water invasion and drainage gas recovery in gas reservoir, and the experimental device includes: a heterogeneous reservoir model having a first core holder, a second core holder, a third core holder and a fourth core holder, wherein the third core holder is connected between the first core holder and the second core holder, and the fourth core holder is connected between an outlet end of the first core holder and an outlet end of the second core holder; a gas injection mechanism having a gas injection bottle and a gas injection cylinder; a water body simulation mechanism having a water storage tank and a water injection pump. The invention can simulate and reveal different drainage gas recovery modes, timings, scales and their influences on the recovery ratio of the gas reservoir.
    Type: Grant
    Filed: October 25, 2019
    Date of Patent: June 7, 2022
    Assignee: PETROCHINA COMPANY LIMITED
    Inventors: Xuan Xu, Xizhe Li, Yong Hu, Yongxin Han, Yunsheng Wei, Yujin Wan, Chunyan Jiao, Zhenhua Guo, Haifa Tang, Weigang Huang, Guangzhen Chu, Yunhe Su
  • Patent number: 11352572
    Abstract: The present invention provides a low viscosity poly-?-olefin lubricating oil and a synthesis method thereof. The method comprises: (1) the ?-olefin raw material is subjected to dehydration treatment so that the water content in the raw material is ?10 ppm; (2) a reaction of the dehydration treated ?-olefin raw material is carried out in the presence of a complex catalyst and gaseous BF3 to obtain a reaction product, wherein the pressure of the gaseous BF3 is 0.01 to 1 MPa; (3) the reaction product obtained in step (2) is sequentially subjected to flash distillation, gas stripping, centrifugation, and washing treatment to obtain an intermediate product; (4) the intermediate product obtained in step (3) is subjected to distillation under reduced pressure to separate the unreacted ?-olefin raw material and ?-olefin dimers, and the remaining heavy fractions are subjected to hydrogenation saturation treatment followed by fractionation and cutting-off.
    Type: Grant
    Filed: October 24, 2019
    Date of Patent: June 7, 2022
    Assignee: PETROCHINA COMPANY LIMITED
    Inventors: Hongling Chu, Sihan Wang, Kecun Ma, Xianming Xu, Libo Wang, Guizhi Wang, Yan Jiang, Legang Feng, Yulong Wang, Enhao Sun, Hongliang Huo, Tong Liu, Yali Wang, Xiuhui Wang, Han Gao, Yuanyuan Cao, Fengrong Wang, Weihong Guan, Ruhai Lin, Xuemei Han, Yunguang Han, Fuling Huang, Buwei Yu