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11th International Field Exploration and development Conference, IFEdC 2021

作者： Zhang, Hong-lin Mi, Kai-fu Guo, Chen Guo, Tian-ming Zhang, Ying-jin Wang, dong Beijing Petroleum Machinery Co. Ltd. CNPC Engineering Technology R&D Co. Ltd. Beijing China

ISBN: (纸本)9789811921483

To prolong the service life and calculate the service time of flexible shaft of titanium alloy, the feasibility of using S-N curve to predict the material life was demonstrated through theoretical derivation. And the S-N curve of fatigue stress was obtained through the ultra-high cycle fatigue test. By using finite element and parameterized method, stress concentration factor under different rounded corners were calculated, stress distribution under different rounded values and bend angles were simulated. The optimal solution of rounded value was calculated. And the optimal solution under different bend angles of safety coefficient was calculated. Though those, the allowable maximum value of the bend angle was determined;And the minimum service time of the flexible shaft under the preferred value was deduced. The fracture mechanics simulation was conducted to calculate the changed law of stress extreme value under different crack depths. The maximum value of crack depth was also calculated. Based on the Paris formula and crack maximum calculation results, the limit cycle times and crack extension rate of the flexible shaft are derived, Consequently, the crack initiation law and service time of flexible shaft of titanium alloy were studied. Field tests and metallographic tests were carried out to verify the correctness of the calculation of crack initiation and propagation law. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Stress concentration

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The influence of structure of the electromagnetic coupler in the wired drill pipe on its equivalent circuit parameters 4

The influence of structure of the electromagnetic coupler in...

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4th International Conference on Advanced Electronic Materials, Computers and Software engineering, AEMCSE 2021

作者： Jia, Jia Su, Yinao Shen, Yue Wang, Long Zhang, Lingtan Ling, Yan School of Petroleum Engineering Qingdao China CNPC Engineering Technology R&D Company Limited Beijing China College of Science Qingdao China

ISBN: (纸本)9781665415965

The telemetry drill string is a high-speed data transmission system of downhole measurement while drilling. The drill string is formed by connected wired drill pipes in series to transmit downhole information to the ground. The electromagnetic signal realizes non-contact cascade transmission through the electromagnetic coupler formed by the drill pipe joint coil. The voltage transfer function of the electromagnetic coupler seriously affects the signal transmission characteristics of the telemetry drill string. The electromagnetic coupler can be regarded as a high-frequency transformer with a special structure. Its structural parameters have a great influence on the equivalent circuit parameters of the coupler. The coupling coefficient of the coupler is directly related to the transmission capacity of electromagnetic signals. In this paper, the above influence factors are systematically studied through the electromagnetic simulation analysis of the coupler. research shows that the coil groove width of the magnetic core in the coupler affects on the coil inductance and the coupling coefficient;the coil groove depth of the magnetic core has a certain effect on the coil inductance, but it has a great influence on the coupling coefficient. The gap between the contact surfaces of the magnetic core has a big effect on the coil inductance and coupling efficient. In the structural design of the coupler, shallow groove depth should be used and the gap between contact surfaces of the magnetic cores should be reduced as much as possible to obtain a larger coupling coefficient, which is beneficial for the coupling transmission of electromagnetic signals. The research in this article has a certain guidance on the structure design of electromagnetic coupler. © 2021 IEEE.

关键词： Equivalent circuits

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research on Network Application of Intelligent Campus Based on SdN technology

Research on Network Application of Intelligent Campus Based ...

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Image Processing and Computer Applications (ICIPCA), IEEE International Conference on

作者： Yunyi Mei Qi Shao Qingzhong Gao Tong Zhao Yanlong Zhang Lingzhi Jing Yang Yu CNPC Engineering Technology R&D Company Limited Beijing China National Engineering Research Center of Oil & Gas Drilling and Completion Technology Beijing China Kunlun Digital Technology Co. Ltd. Beijing China CNPC Great Wall Drilling Company Beijing China

There are some problems in traditional network architecture, such as traffic can not be real-time scheduling, business information can not be visualized, operation and maintenance is complex, and fault location efficiency is low. In order to meet the needs of “digital Petroleum” network infrastructure construction, a company introduced SdN technology into the campus office network, and carried out network optimization management and innovation practice, this paper puts forward a network transformation scheme based on SdN “The network follows the people”, through deploying SdN control server and adjusting the network equipment configuration, the office network can be expanded flexibly and maintained efficiently, to meet the needs of different types of application traffic classification management and intelligent precision scheduling, effectively improve the level of intelligent network management.

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Well depth monitor software design based on laser distance measuring device

Well depth monitor software design based on laser distance m...

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Abu dhabi International Petroleum Exhibition and Conference 2020, AdIP 2020

作者： Han, Haochen Hu, Yongjian Zhang, Yong Sun, Qi Sun, Chengqin Fang, Zhimeng Chen, Haoweu CNPC Engineering and Technology R&D Company

ISBN: (纸本)9781613997345

Well depth is one of the most valuable parameters in drilling engineering. Commonly well depth is calculated by the absolute difference in height based on the revolution of drawwork sensor, which is a pulse encoder or incremental optical encoder. Both encoders have complicated calibration process, and the measurement is easily disturbed. different from the traditional indirect measurement from the drawwork sensor, the direct measurement provided by laser distance device can simplify the process and decrease the systemic error. The principle of the measurement is to calculate the distance by the product of the atmospheric refraction coefficient and the speed of light. In our design, we fixed the laser distance device on the hook and placed the reflector under the crown to measure the height variant. Modern industrial laser distance device with high accuracy can finish multiple measurements per unit time and calculate the average to reduce the measurement error effectively. The well depth measurement system software based on laser distance measuring device can shorten and simplify the calibration process or even realize automatic calibration. The laser distance measuring device can be used effectively in the severe weather, such as strong winds, and minimize the error caused by manual operation. We completed the optimization of laser distance sensor and selected Sick dL 100 as the main laser sensor, as well as a laser measurement prototype in lab. After thousands of trials and errors, it turns out to be applicable. In order to be compatible with the new well depth measurement system, we developed a corresponding software *** Framework and WPF. With the help *** framework and WPF, UI and core codes of the software are separated in physical isolation, which can improve the development efficiency and make preparation for further extension and optimization. The software supports portal communication and ethernet, which can connect with the laser distance device conv

关键词： Signal encoding

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development Strategy and Countermeasures of China's CBM Industry under the Goal of “Carbon Peak and Neutrality”

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Journal of Earth Science 2023年第4期34卷 975-984页

作者： Fengyin Xu Xia Yan Fenglin Wang Xinyuan Ma Jian Yun Hongna Wang Borui Xu Shuangyuan Zhang delei Mao China United Coalbed Methane National Engineering Research Center Co. Ltd.Beijing 100095China Research Institute of Petroleum Exploration&Development PetroChina Coalbed Methane Co.Ltd.Beijing 100028China Research management department CNPC Research Institute of Safety and Environment Technology Co.Ltd.Beijing 102249China Exploration technical R&D Center CNPC Exploration Software Co.Ltd.Beijing 100080China

China’s coalbed methane(CBM) industry is in an extremely important “climbing period” and “strategic opportunity period”,which can be generally characterized by “three low and one small”:low degree of exploration and development,low adaptability of main technology,low return on investment and small development *** the “carbon peak and neutrality” background,the development status of CBM industry is systematically *** resources,technology,management problems and reasons are *** and countermeasures to accelerate the industrial development are put forward according to the factors such as efficient development of resources,major technical breakthrough,talent team training,policy formulation and implementation,return on investment and so *** existing problems are as follows:(a) The overall occurrence conditions in China are complicated and the development is difficult compared with the other countries.(b) The research precision accuracy of CBM resource conditions is not enough.(c) The adaptability of technology is poor.(d) The management mode is not *** view of these problems,this paper puts forward the “two steps” development strategy and the technical and management countermeasures of “five in one”.The corresponding “five in one” technology and management countermeasures are the formulation and implementation of relevant safeguard measures in accordance with the principle of collaborative innovation in five aspects:resources,technology,talents,policies and *** the above measures,the dream and grand blueprint of CBM industry shall be realized.

关键词： coalbed methane CBM industry carbon peak carbon neutrality development strate-gy countermeasures.

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research on the method of dynamic PdC cutters distribution 5

Research on the method of dynamic PDC cutters distribution

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5th International Conference on Energy engineering and Environmental Protection, EEEP 2020

作者： Peng, Qi Zhou, Yingcao Yang, Xiongwen Liu, Yu Cheng, Chris CNPC Engineering Technology R and D Company Limited Beijing China Research Institute of Petroleum Exploration and Development Beijing China CNPC USA Corporation HoustonTX United States

PdC bit design, especially the design of the crown and cutters of PdC bit, is a relatively complex analysis process, which involves many factors such as the back-dip angle, cutting depth, cutting force, cutting power and other factors of PdC cutters. At present, the traditional design methods of PdC cutters distribution are mostly based on analysis of rock breaking efficiency of single cutter, which can only reflect the working state of the single cutter under the set parameters, and cannot fully reflect the differences of different positional cutters during the cutting process. In order to solve this problem, this article proposes a dynamic method through target formation lithology characteristics. The working parameters of all the PdC cutters are analyzed in detail basing on equal wear theory and bottom hole covering theory. The working parameters include static parameters (cutting position, back dip angle, cutting depth, effective cutting area.) and dynamic parameters (cutting force, cutting power, cutting torque and cutting energy etc.). The energy required by all the PdC cutters to break rock of per volume during drilling process is taken as the target constraint condition for iterative analysis. This design method can intuitively and effectively analyse the working parameters of cutters which located bit core, nose, shoulder and gauge area, and it provides a good reference for dynamic balance design of PdC bit. © Published under licence by IOP Publishing Ltd.

关键词： Lithology

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Copolymer intercalated hydrotalcite sustained release-type fluid loss additive for water-based drilling fluid: Synthesis, characterization, and performance evaluation

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Colloids and Surfaces A: Physicochemical and engineering Aspects 2023年第1期669卷

作者： Li, Pengpeng Liu, Ming Feng, Jie Hui, Baotong Hu, Miaomiao Guo, Jintang School of Chemical Engineering and Technology Tianjin University Tianjin300350 China CNPC Engineering Technology R&D Company Limited Beijing102206 China Zhejiang Shaoxing Institute Tianjin University Zhejiang312300 China

The polyanionic copolymer fluid loss additive (PSAdM) intercalated hydrotalcite sustained release-type fluid loss additive (PSAdM–LdH) was fabricated through in situ intercalation polymerization to alleviate the deterioration of filtration and rheological properties of water-based drilling fluid (WBdF) under extreme geological conditions (e.g., high-temperature and alt-gypsum formations). The PSAdM between layers of LdH can be slowly exchanged by anions in WBdF to give full play to its original efficiency. results of FT–Ir, TG and Xrd demonstrate that the PSAdM successfully intercalated the layers of LdH, and the intercalation rate was approximately 14 wt%. In addition, results of filtration measurements of WBdF demonstrate that the PSAdM–LdH significantly decreased the filtration volume, even though after thermal rolling at 200 °C the filtration volume of brine drilling fluids contained 2 wt% PSAdM–LdH was reduced by approximately 50% compared with PSAdM. Moreover, the introduction of PSAdM–LdH enhanced the thixotropy of WBdF because of forming a dynamic reversible gel structure by copolymer and charged clay colloidal particles (LdH and bentonite), which is conducive to giving full play to the water power of the bit, and carrying and suspending the drill cutting well in the annulus. Therefore, PSAdM–LdH has broad application prospects for exploring and developing super-deep reservoirs. © 2023 Elsevier B.V.

关键词： drilling fluids

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An Experimental Method for Obtaining Optimal Proppant Packing ratios for Micro-Sized Proppant Placement in Unconventional reservoirs

An Experimental Method for Obtaining Optimal Proppant Packin...

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2024 Abu dhabi International Petroleum Exhibition and Conference, AdIPEC 2024

作者： Liu, Huifeng Zhang, Jiayuan Luan, Guilin Feng, Shengjie Chen, Zhangxin Wang, duo CNPC R&D DIFC Company Limited Dubai United Arab Emirates State Key Laboratory of Continental Shale Oil Northeast Petroleum University Heilongjiang Daqing China Institute of Unconventional Oil & Gas Northeast Petroleum University Heilongjiang Daqing China Eastern Institute of Technology Ningbo China

ISBN: (纸本)9781959025498

Coal bed methane and shale gas reservoirs are extensively developed in China, not only because of their large reserves, but also because they are clean energy resources and contribute to the net zero emissions. However, these reservoirs are usually typical unconventional reservoirs with tight matrix and natural fractures. Hydraulic fracturing with micro-sized proppants is used to develop them cost-effectively. However, a quantitative design for micro-sized proppant injection is not mature and is still raising attention in industry. different from traditional proppants, micro-sized proppants ( Copyright 2024, Society of Petroleum Engineers.

关键词： Silica sand

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Optimization design of gas injection and brine discharge process parameters in salt cavern gas storage

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International Journal of Thermofluids 2025年 27卷

作者： Kang, Yi Yuan, Guangjie Guan, Yueyang Fu, Pan Yuan, Yuan Tian, Shouceng CNPC Engineering Technology R&D Company Limited Beijing China College of Petroleum Engineering China University of Petroleum Beijing China China State Key Laboratory of Oil and Gas Resources and Exploration Beijing China SouthWest Petroleum University Sichuan China

The gas injection and brine discharge technology, as a key technique in salt cavern construction, is crucial for effectively removing brine from the cavern to optimize storage capacity. However, during the later stage of gas injection and brine discharge, the presence of insoluble particles in the salt rock formation poses a risk of clogging the brine discharge pipe as the pipe extends deeper into the cavern to maximize brine removal. To address this, numerical simulations using Fluent software were conducted, employing the enhanced realizable k-epsilon turbulent model and Eulerian multiphase flow model to analyze the transport behavior of gas, liquid, and solid phases in the salt cavern, as well as the gas injection and brine discharge strategies. By integrating numerical simulations with orthogonal experimental methods, the influence of gas injection pressure and brine discharge pipe diameter on the gas injection and brine discharge process was investigated. The results indicate that, under higher gas injection pressures, particularly at 14 MPa, the risk of brine discharge pipe clogging due to sediment deposition at the pipe inlet is reduced, with lower sediment mound heights observed. Additionally, smaller brine discharge pipe diameters, such as 114.3 mm, result in decreased sediment mound heights and reduced risk of pipe clogging. These findings provide theoretical insights and technical guidance for practical applications and construction practices in the field. © 2025

关键词： Caves

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Study on Effect of Supercritical Carbon dioxide on Mechanical Properties of Tight Sandstone reservoir in Sichuan Basin 13th

Study on Effect of Supercritical Carbon Dioxide on Mechanica...

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13th International Field Exploration and development Conference, IFEdC 2023

作者： Wang, du Luo, Wei Wang, Chuan-Lei Peng, Huan Zhou, Lang Ma, Zhi-Han Engineering Technology Research Institute of Southwest Oil and Gas Field Company PetroChina Chengdu China National Energy R&D Center of High-Sulfur Gas Reservoir Exploitation Chengdu China

ISBN: (纸本)9789819702671

In order to study the influence of supercritical carbon dioxide on the mechanical properties of tight sandstone reservoirs in the Sichuan Basin and to understand the interaction mechanism between supercritical carbon dioxide and tight sandstone, methods such as triaxial compression experiments, rock morphology analysis experiments, and whole rock analysis experiments were used to clarify the influence of supercritical carbon dioxide on the mechanical properties of sandstone in the Sichuan Basin and to preliminarily analyze the interaction mechanism between supercritical carbon dioxide and sandstone. The research results show that: (1) under the action of supercritical carbon dioxide,the compressive strength of sandstone will decrease significantly, the Young's modulus will decrease, the Poisson's ratio will increase, and the brittleness will increase;(2) with the increase of the time of supercritical carbon dioxide, the compressive strength decreases faster, the Young's modulus gradually decreases, the Poisson's ratio does not change much, and the brittleness increases. The failure mode of sandstone changes from shear failure to the complex failure mode of "tensile failure + shear failure";(3) Supercritical carbon dioxide will not only change the pore structure of sandstone, but also the mineral composition of sandstone. The conclusion is that supercritical carbon dioxide will react chemically with some minerals in sandstone, causing mineral dissolution and precipitation, and to some extent changing the pore structure of sandstone, resulting in the degradation of its mechanical properties. The research results of this paper have certain guiding significance for the design of supercritical carbon dioxide fracturing in the Sichuan Basin. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Sandstone

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