Patents Assigned to China National Petroleum Corporation
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Publication number: 20240125963Abstract: The present disclosure provides a method and a system for acquiring seismic data of a four-component ocean bottom node (OBN). The method is implemented by the system, comprising controlling installations of a plurality of ocean bottom submerged buoys and a plurality of four-component OBN seismic data acquisition instruments and sending positioning signals and timing signals to the plurality of ocean bottom submerged buoys through armored opto-electronic composite cables. The method also includes obtaining real-time and uninterrupted water temperature data, pressure data, density data, and salt saturation data along the armored opto-electronic composite cables from the ocean surface to locations of the plurality of ocean bottom submerged buoys, and calculating real-time and three-dimensional data of waters of a whole measurement work area through interpolation.Type: ApplicationFiled: December 25, 2023Publication date: April 18, 2024Applicants: BGP INC., CHINA NATIONAL PETROLEUM CORPORATION, OPTICAL SCIENCE AND TECHNOLOGY (CHENGDU) LTD.Inventors: Liang GOU, Gang YU, Haibo LIU, Zhaohong XU, Ximing WANG, Shujun XIA, Shujie AN, Mengxiong XIAO
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Patent number: 11946350Abstract: A method for remotely shutting down a downhole unit of a rotary steering system from ground includes steps of: a: calculating a pressure difference P1 between a front end and a rear end of the drill water hole; b: calculating an extension loss ?P; c: calculating a pressure P2 at the riser after turning on the downlink device; d: calculating an opening area S1 of the throttle valve of the downlink device; and e: adjusting the throttle valve to a calculated opening degree; automatically targeting the function block that needs to be cut off according to a flow change detected downhole, and shutting down the downhole unit. The method can realize self-protection and continuous operation of the entire rotary steering system, reduce frequency of inspection that needs to pull back the drill when the rotary steering system is abnormal, improve drilling efficiency, and reduce costs.Type: GrantFiled: May 25, 2021Date of Patent: April 2, 2024Assignees: CHINA NATIONAL PETROLEUM CORPORATION, CNPC CHUANQING DRILLING ENGINEERING COMPANY LIMITEDInventors: Jing Bai, Jichuan Zhang, Dengyun Lu, Lei Li, Chongjun Huang, Lichun Jia, Chong Liao, Liexiang Han, Dejun Zhang, Gui Tang
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Publication number: 20240085581Abstract: The present disclosure provides a device for full-wave field seismic source based on a gas explosion technology and a method for acquiring seismic data. The device includes a cylindrical explosion-proof metal outer barrel, and four sides of the explosion-proof metal outer barrel are fixedly connected to four high-strength steel plates. The device also includes a cylindrical explosion-proof metal gas explosion inner barrel and pipelines for injecting high-pressure air and high-pressure gas into the gas explosion inner barrel. A center of the gas explosion inner barrel is installed with an electronic ignition gun, which is connected to a GPS timing module connected to the electronic ignition gun. The device further includes a controller configured to control a seismic source of a gas explosion full-wave field.Type: ApplicationFiled: November 6, 2023Publication date: March 14, 2024Applicants: BGP INC., CHINA NATIONAL PETROLEUM CORPORATION, OPTICAL SCIENCE AND TECHNOLOGY (CHENGDU) LTD.Inventors: Liang GOU, Gang YU, Maojun YANG, Ximing WANG
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Publication number: 20240043741Abstract: A polyacrylamide friction reducer wherein the friction reducer contains surfactant functional groups, and wherein the polyacrylamide friction reducer is degradable, can be used for multi-functional, slickwater fracturing fluid projects. Under downhole conditions, the polymer degrades and releases the surfactant molecules to act as oil displacing agent to provide additional stimulation.Type: ApplicationFiled: October 12, 2023Publication date: February 8, 2024Applicants: CNPC USA CORPORATION, BEIJING HUAMEI, INC., CHINA NATIONAL PETROLEUM CORPORATIONInventors: Fuchen Liu, Jianshen Li, Lijun Lin, Jiangshui Huang, Genyao Lin, Lulu Song, Stephanie Yu
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Publication number: 20240043740Abstract: A polyacrylamide friction reducer wherein the friction reducer contains surfactant functional groups, and wherein the polyacrylamide friction reducer is degradable, can be used for multi-functional, slickwater fracturing fluid projects. Under downhole conditions, the polymer degrades and releases the surfactant molecules to act as oil displacing agent to provide additional stimulation.Type: ApplicationFiled: October 12, 2023Publication date: February 8, 2024Applicants: CNPC USA CORPORATION, BEIJING HUAMEI, INC., CHINA NATIONAL PETROLEUM CORPORATIONInventors: Fuchen Liu, Jianshen Li, Lijun Lin, Jiangshui Huang, Genyao Lin, Lulu Song, Stephanie Yu
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Publication number: 20240043734Abstract: A low-end rheology modifier for adjusting rheological characteristics of water-based drilling fluid systems, particularly for high salt, high density drilling fluids in high temperature and high-pressure applications. The low end rheology modifier comprises a copolymer and laponite clay, the copolymer comprising tert-Butylacrylamidosulfonic acid (TBAS) and n-vinylpyrrolidone (NVP) crosslinked with N,N?-Methylenebis(acrylamide).Type: ApplicationFiled: August 8, 2022Publication date: February 8, 2024Applicants: CNPC USA CORPORATION, Beijing Huamei Inc., CHINA NATIONAL PETROLEUM CORPORATIONInventors: JANINE SHIPMAN, MENG LU, WEIBIN ZHA
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Patent number: 11885196Abstract: The retrievable packer system includes a packer mandrel, a lock ring, an upper cone, a lower cone, a slip device, a retrieval mandrel, and a slotted retrieval sleeve. The lock ring is attached to the packer mandrel, followed by the upper cone, the slip device, the lower cone, and the retrieval mandrel. The upper connection sleeve and the lower connection sleeve cover the packer mandrel so as to form a chamber in fluid connection with slip flow channels of the slip device. The packer system is run into the borehole with the slotted retrieval sleeve in the first position relative to the lower cone and the slip device in the run-in position. The packer system is set and can be locked at a location in the borehole. The slotted retrieval sleeve can push the upper cone to return the slip device to the run-in position for retrieval of the packer system.Type: GrantFiled: October 24, 2022Date of Patent: January 30, 2024Assignees: CNPC USA Corporation, Beijing Huamei, Inc., China National Petroleum CorporationInventors: Damon Nettles, Perry Batson, Kwami Roberts, Peng Cheng, Jianpeng Yue
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Patent number: 11880012Abstract: A method for extracting a downgoing wavelet and attenuation parameters from VSP data, comprising: performing upgoing and downgoing P-waves separation processing on VSP data to obtain downgoing P-wave data; performing a FFT on seismic data with a preset time window length and cut from the downgoing P-wave data to obtain FFT transformed downgoing P-wave data and a multi-trace downgoing P-wave log spectrum; subtracting a downgoing wavelet log spectrum from the multi-trace downgoing P-wave log spectrum to obtain a wavelet-corrected multi-trace downgoing P-wave log spectrum; performing a correction and an inverse FFT on the FFT transformed downgoing P-wave data to obtain a downgoing wavelet; and obtaining attenuation parameters based on P-wave first arrival time and the parameters of the wavelet-corrected multi-trace downgoing P-wave log spectrum. Also provided are an apparatus for extracting a downgoing wavelet and attenuation parameters from VSP data and a computer device.Type: GrantFiled: January 19, 2021Date of Patent: January 23, 2024Assignee: CHINA NATIONAL PETROLEUM CORPORATIONInventors: Yanpeng Li, Jing Wang
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Publication number: 20240003205Abstract: A method for significantly reducing and/or preventing loss circulation in a well during drilling operations. The method includes pumping water-based drilling fluid comprising shape memory polymer particles into bore hole while drilling and exposing the drilling fluid to an activation temperature. The polymer particles change shape at activation temperature filling all or portion of fractures in the bore hole thus significantly reducing and/or preventing loss circulation in the well.Type: ApplicationFiled: July 1, 2022Publication date: January 4, 2024Applicants: CNPC USA CORPORATION, BEIJING HUAMEI, INC., CHINA NATIONAL PETROLEUM CORPORATIONInventors: WEIBIN ZHA, MENG LU, JANINE SHIPMAN, JIAXIANG REN, FUCHEN LIU, RONGCHAO CHENG
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Patent number: 11851606Abstract: The disclosure includes a new test method of evaluating lost circulation prevention with expandable geopolymers. The expandable geopolymer is tested using a permeability plugging tester, slot disk, drilling fluid, and a piston to determine how much fluid is released from the test cell.Type: GrantFiled: October 28, 2021Date of Patent: December 26, 2023Assignees: CNPS USA CORPORATION, BEIJING HUAMEI INC., CHINA NATIONAL PETROLEUM CORPORATIONInventors: Weibin Zha, Meng Lu, Janine Shipman
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Patent number: 11851612Abstract: A novel surfactant composition that comprises of two surfactant components, a solvent, and water. The surfactant composition is added to a fracturing fluid, which is then pumped downhole into a subterranean formation where the novel characteristics of the fracturing fluid lend to improved oil production over the fracturing fluid without the surfactant composition.Type: GrantFiled: November 15, 2022Date of Patent: December 26, 2023Assignees: CNPC USA CORPORATION, Beijing Huamei, Inc., China National Petroleum CorporationInventors: Jiangshui Huang, Nancy Zhou, Lijun Lin, Fuchen Liu, Guodong Wu, Bo Huang
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Patent number: 11827780Abstract: The patent application discloses a degradable polymers compounds. The polymer compounds comprises product of blends of polyglycolic acid and polylactic acid in a weight ratio of from about 99/1 to about 50/50 in mixture with a compatibilizer poly(lactic-co-glycolic acid), wherein the compounded product has a tensile strength of at least about 12,000 psi.Type: GrantFiled: December 8, 2021Date of Patent: November 28, 2023Assignees: CNPC USA CORPORATION, BEIJING HUAMEI INC., CHINA NATIONAL PETROLEUM CORPORATIONInventors: Peixiang Xing, Jiaxiang Ren, Peng Cheng, Yu Liu
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Publication number: 20230295515Abstract: Some reservoirs have tight oil formations, such as the Changqing reservoir. The surfactant polymer flooding and low-tension gas flooding are two potential chemical flooding methods for use in tight oil formations. In these methods, an oil displacement agent, or surfactant, is added. Derivatives of nonionic surfactants with extended chains (by propylene oxide and ethylene oxide) from di-alkyl alcohols were developed and tested. A synergistic blend of surfactants was developed between the di-alkyl chain surfactants and a commercially available anionic surfactants that lowers interfacial tension and improves surfactant solubility in high salinity water and oil.Type: ApplicationFiled: March 23, 2023Publication date: September 21, 2023Applicants: CNPC USA Corporation, Beijing Huamei, Inc., China National Petroleum CorporationInventors: Nancy Chun Zhou, Fuchen Liu, Meng Lu, Steven Vaughan
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Patent number: 11753581Abstract: This disclosure describes the composition and methods of use for a novel delayed polymer gelation system. This polymer gelation system includes a polymer of acrylamide, AMPS and 100-2,000 ppm polyethylene glycol diacrylate in inverse emulsion form, and a polyethyleneimine (PEI) with Mw of 5,000-100,000 Dalton as the crosslinking agent.Type: GrantFiled: December 4, 2019Date of Patent: September 12, 2023Assignees: CNPC USA Corporation, Beijing Huamei, Inc., China National Petroleum CorporationInventors: Meng Lu, Fuchen Craig Liu
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Publication number: 20230265335Abstract: This disclosure describes the composition and methods of use for a novel delayed polymer gelation system for high temperature and high salinity applications. This polymer gelation system includes a polymer of acrylamide, AMPS and 500-5000 ppm polyethylene glycol diacrylate in inverse emulsion form, and a polyethyleneimine (PEI) with a MW of 2,000-30,000 daltons as the crosslinking agent.Type: ApplicationFiled: March 31, 2023Publication date: August 24, 2023Applicants: CNPC USA Corporation, Beijing Huamei, Inc., China National Petroleum CorporationInventors: Meng Lu, Danhua Zhang, Fuchen Liu, Nancy Zhou, Jianshen Li, Weibin Zha
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Publication number: 20230228162Abstract: A pressure compensation device with an accumulator group for controlled pressure drilling includes an electrical flat valve, a check valve, an accumulator group, a flanged pup joint and a support base. The electrical flat valve is connected to the check valve and is mounted on a top surface of the support base. The accumulator group mounted on the whole support base is a pre-storage pressure compensation device for controlled pressure drilling, and is located at a downstream position of the check valve. The liquid inlet end of the accumulator group is connected to the check valve, and the liquid discharge end is connected to the flanged pup joint.Type: ApplicationFiled: September 7, 2020Publication date: July 20, 2023Applicants: CNPC BOHAI DRILING ENGINEERING COMPANY LIMITED, CHINA NATIONAL PETROLEUM CORPORATION, CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)Inventors: Jinshan MA, Baojiang SUN, Jintao QI, Liming WEI, Fengliang XI, Gang LIU, Zhiyuan WANG, Xing WANG, Haichao XU, Long MA, Jiacui LUAN, Lei CHEN, Guodong CHEN, Yuanlin ZHAO, Zisen YANG, Qiang HUANG, Menglei MA, Xiantao MENG, Hongyin WEI
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Publication number: 20230213669Abstract: The present invention provides an intelligent geophysical data acquisition system and acquisition method for shale oil and gas optical fiber. A pipe string is arranged in a metal casing, and an external armored optical cable is fixed outside the metal casing; an, internal armored optical cable is fixed outside the pipe string; the external armored optical cable comprises a downhole acoustic sensing optical cable, two multi-mode optical fibers, a strain optical cable and a pressure sensor array, and further comprises horizontal ground acoustic sensing optical cables arranged in the shallow part of the ground according to an orthogonal grid, and artificial seismic source excitation points arranged on the ground according to the orthogonal grid.Type: ApplicationFiled: March 10, 2023Publication date: July 6, 2023Applicants: BGP INC., CHINA NATIONAL PETROLEUM CORPORATION, OPTICAL SCIENCE AND TECHNOLOGY (CHENGDU) LTDInventors: Gang Yu, Xing Liang, Liang Gou, Yunjiang Rao, Ximing Wang, Shujun Xia, Shujie An, Junjun Wu, Yuanzhong Chen, Zengling Ran, Renzhi Zhang
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Publication number: 20230193119Abstract: A hydraulic fracture fluid is provided. The fluid can include a liquid solvent, one or more surfactants, a proppant-forming compound, and one or more curing agents. The liquid reacts to form proppant in-situ under downhole conditions.Type: ApplicationFiled: February 13, 2023Publication date: June 22, 2023Applicants: CNPC USA Corporation, Beijing Huamei, Inc., China National Petroleum CorporationInventors: Lijun Lin, Jiangshui Huang, Litao Bai, Stephanie Yu, Fuchen Liu, Congbin Yin, Wei Gong
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Patent number: 11649395Abstract: Some reservoirs have tight oil formations, such as the Changqing reservoir. The surfactant polymer flooding and low tension gas flooding are two potential chemical flooding methods for use in tight oil formations. In these methods, an oil displacement agent, or surfactant, is added. Nonionic surfactants with extended chains (by propylene oxide and ethylene oxide) from dialkyl alcohols or dialkyl amines were tested. A synergistic blend of surfactants was developed between the nonionic surfactants and anionic surfactants that lowers interfacial tension and improves surfactant solubility in water and oil.Type: GrantFiled: June 17, 2020Date of Patent: May 16, 2023Assignees: CNPC USA CORPORATION, BEIJING HUAMEI, INC., CHINA NATIONAL PETROLEUM CORPORATIONInventors: Nancy Chun Zhou, Fuchen Liu
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Patent number: 11618844Abstract: The invention provides a high temperature resistant Portland cement slurry and a production method thereof. The high temperature resistant Portland cement slurry comprises the following components by weight: 100 parts of an oil well Portland cement, 60-85 parts of a high temperature reinforcing material, 68-80 parts of fresh water, 1-200 parts of a density adjuster, 0.1-1.5 parts of a suspension stabilizer, 0.8-1.5 parts of a dispersant, 3-4 parts of a fluid loss agent, 0-3 parts of a retarder and 0.2-0.8 part of a defoamer. The high temperature resistant Portland cement slurry has a good sedimentation stability at normal temperature, and develops strength rapidly at a low temperature. The compressive strength is up to 40 MPa or more at a high temperature of 350° C., and the long-term high-temperature compressive strength develops stably without degradation.Type: GrantFiled: January 28, 2019Date of Patent: April 4, 2023Assignees: CHINA NATIONAL PETROLEUM CORPORATION, CNPC ENGINEERING TECHNOLOGY R&D COMPANY LIMITEDInventors: Hua Zhang, Jianzhou Jin, Shuoqiong Liu, Fengzhong Qi, Yongjin Yu, Ming Xu, Jinping Yuan, Zhiwei Ding, Chongfeng Zhou, Chi Zhang, Zishuai Liu, Yusi Feng, Yuchao Guo