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7th CIrP Conference on Surface Integrity, CSI 2024

作者： Gonçalves, Maria Clara Coimbra Alsters, rob Curtis, david M'Saoubi, rachid Ghadbeigi, Hassan University of Sheffield Mechanical Engineering Department Mappin Street Sheffield United Kingdom R&D Materials and Technology Development Seco Tools AB Zandterweg 14 Lottum5973 RC Netherlands Advanced Manufacturing Research Centre University of Sheffield RotherhamS60 5TZ United Kingdom R&D Materials and Technology Development Seco Tools AB Fagersta737 82 Sweden Division of Production and Materials Engineering Lund University Ole Römers väg 1 Lund221 00 Sweden

Micromilling is a subtractive manufacturing process that presents challenges due to scale effects and rapid tool wear. To understand the evolution of surface quality when increasing the machined length during the micromilling process, this study assessed the surface roughness, topography, and defects of slots micromilled on Ti-6Al-4V. For the experiments, 1 mm diameter flat end mills were employed, and the cutting parameters were varied using a full factorial design. Subsequently, the surface texture field parameter Sa was assessed every 20 mm, up until the machining length of 260 mm. The analysed results led to the conclusion that, for the adopted set of parameters and the machining length of up to 260 mm, surface roughness was not significantly correlated to the machined length in the micromilling process of Ti-6Al-4V, as the Pearson coefficient, obtained from the correlation analysis, was -0.052. However, the surface roughness was mainly influenced by feed rate (Pearson coefficient of 0.82), with higher feed rates leading to roug surfaces (up to Sa = 0.4 μm) duhere to the tool load increase that causes wider feed marks on the surface. regarding the feed marks, they were affected by the tool rotational frequency due to system vibration. Additionally, surface defects of adhered material, smearing, tearing and side flow were observed. For lower feeds, material adhesion was the main type of defect observed, while higher feed rates favoured the side flow phenomenon. © 2024 The Authors. Published by Elsevier B.V.

关键词： Surface roughness

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The Successful Application of Expansion Tube technology in the Bongor Basin of Chad 13th

The Successful Application of Expansion Tube Technology in t...

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13th International Field Exploration and development Conference, IFEdC 2023

作者： Zhong, Zhao Li, Xiao-Gang Liu, Ji-Tong Ji, Fei Li, Gang-Lu Jia, Tao Liu, Chen-Chao Zhang, Guo-Bin Liu, Shan-Shan CNPC Engineering Technology R&D Company Limited Beijing102206 China China National Oil and Gas Exploration and Development Corporation Beijing100034 China CNPC Bohai Drilling Engineering Company Limited Tianjin300452 China

ISBN: (纸本)9789819702558

The Bongor is the main basin for increasing storage and production in the CNPC Chad. With the continuous deepening of development, underground safety operations face the following problems: the inability to effectively seal the gas layer in the overlying strata of the basement, the high risk of secondary completion of the basement gas injection well, and the poor stability of the wellbore in the M group shale formation. In response to the bottleneck problems faced by underground operations, geological, drilling, logging, and other data were analyzed and sorted. Based on the expansion tube technology, the safety sealing technology for high-pressure gas cap in basement, secondary completion technology for basement gas injection wells, and openhole sealing technology for expansion tubes were optimized and formed. They were successfully applied for the first time in the Bongor Basin, achieving a daily gas injection volume of 2000 Nm3, shortening the construction cycle, improving wellbore quality, and reducing complex underground risks, Subsequently, it will be widely promoted and applied as a mature technology, supporting the efficient development of the Bongor Basin. At the same time, the expansion tube technology has a demonstration effect on the development of similar oil fields due to its good practical functions and application value [1–6]. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Gases

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Effect of Alternating Load on Sand Production of Gas Storage 12th

Effect of Alternating Load on Sand Production of Gas Storage

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12th International Field Exploration and development Conference, IFEdC 2022

作者： Zhang, Yu-da Yuan, Guang-Jie dong, Jing-Nan Xia, Yan Ban, Fan-Sheng Zang, Chun-Yang Research Institute of Petroleum Exploration and Development Beijing China CNPC Engineering Technology R&D Company Limited Beijing China College of Petroleum Engineering Liaoning Petrochemical University Liaoning China

ISBN: (纸本)9789819919635

Energy types are constantly changing due to the change of demand, and natural gas as a clean energy is gradually accepted by the world at present. In order to ensure the stable supply of natural gas, long-term, safe and effective means of peak regulation have emerged, and gas storage has developed rapidly in recent years. The injection and production condition of gas storage changes with the demand of gas peak adjustment. The formation pressure increases and the matrix stress decreases during gas injection. The formation pressure decreases and the matrix stress increases during gas recovery. Compared with production wells, injection and production wells of gas storage are more susceptible to shear stress and tensile stress under the action of alternating loads, so the phenomenon of sand production in gas storage is very common. In this paper, based on the sand production simulation device of gas storage, the influence of alternating load on sand production of gas storage is discussed through indoor experiment. In the experiment, the magnitude and times of applying alternating load are mainly changed to observe the sand production of core. The experimental results show that the core is more likely to produce sand under the action of alternating load, and the amount of sand produced gradually increases with the increase of the number of alternating load. Unconsolidated sandstones also produce sand when the alternating load is lower than the initial sand-producing pressure. The influence of alternating load on sand production of gas storage provides theoretical and experimental basis for sand production prediction and sand control completion method optimization. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2023.

关键词： Sand

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Study On Shear & Tensile Activation Of Hydraulic Fracturing In Natural Fractured reservoirs

Study On Shear & Tensile Activation Of Hydraulic Fracturing ...

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2023 SPE/IATMI Asia Pacific Oil and Gas Conference and Exhibition, APOG 2023

作者： Zhang, Yang Qiao, Yan Zhou, Fujian ren, dengfeng Liu, Yuzhang Bai, Jie China University of Petroleum Beijing China CNPC Engineering Technology R&D Company Limited China PetroChina Tarim Oilfield Company China Research Institute of Petroleum Exploration & Development China

ISBN: (纸本)9781613999813

The most fundamental purpose of reservoir stimulation is to maximize stimulation volume. For reservoirs developed with natural fractures, the maximization of fracture activation (tensile & shear activation) area should be pursued. Many scholars have studied the mechanical conditions of natural fractures activation, and used stress shadow to optimize cluster spacing. However, there is a lack of in-depth research on fracture propagation law, relationship between fracture activation and stress shadow, and factors affecting natural fracture activation. In this paper, numerical simulation methods are used to establish a true three-dimensional hydraulic fracturing model for reservoirs with natural fractures, and the quantitative evaluation indicators of stress shadow area and activation degree of natural fractures are formed. By studying the effects of different natural fracture properties, mechanical and engineering parameters on fracture propagation, stress shadow and natural fracture activation, the main controlling factors affecting fracture propagation and turning, the relationship between fracture activation and stress shadow, and changing rules of fracture activation are clarified. Finally, the fracture turning and accuracy of model are verified by microseismic monitoring data. Studies have shown that large-scale, high-density natural fractures, high net pressure, low in-situ stress difference, and moderate stress-fracture angle (30°~60°) can easily divert the propagation of hydraulic fractures instead of expanding in the horizontal maximum principal stress (Shmax) direction. Fracture tensile activation has a strong positive correlation with stress shadow area, that is, tensile activation leads to the increase of stress shadow area, while fracture shear activation has almost no correlation. Fracture tensile & shear activation area is in a competitive relationship, and shear fractures are dominant when the stressfracture angle is 45-60°, the in-situ stress differenc

关键词： Stresses

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Effect of cooling scheme and coating of drills on hole quality in drilling of Inconel 718

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Procedia CIrP 2024年 123卷 137-142页

作者： Jinming Zhou Stefan Frejd Kateryna Slipchenko Andrii Hrechuk rachid M’Saoubi Division of Production and Materials Engineering Lund University Lund Sweden Seco Tools AB R&D Material and Technology Development Fagersta Sweden

Challenges in drilling nickel-based superalloys, such as Inconel 718 (IN718), are multifaceted. High requirement of hole surface quality in drilling such alloy must deal with extreme material properties and complex process condition in drilling operation. This paper presents an experimental investigation on the effect of PVd coated solid carbide drills under different internal cooling schemes on hole quality in drilling IN 718 alloy. Three types of solid carbide drills were used in the series of drilling experiments, including PVd coated and uncoated drills, and different design in the number of internal cooling channels, two channels and four channels. The objective of the investigation is to assess the effect of coating and efficiency of internal cooling on surface quality in drilling IN718 alloy. Surface quality on drilled holes in terms of roughness, burr formation, subsurface deformation and strain hardening has also been measured and analyzed on the machined specimen. The roughness and burr size on drilled holes demonstrated little differences among the three types of testing drills. Surface roughness was severely deteriorated by the chip trapped in the hole leaving scratch and smears on the surface. Nevertheless, the scheme of internal cooling channels and PVd coating exhibited noticeable influence on quality of drilled hole surface.

关键词： drill Superalloy Surface quality PVd coating Cooling Burr

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Mesoporous SiO_(2)nanoparticles with low surface energy and multi-level roughness as shale wellbore stabilizers in oil-based drilling fluid

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Petroleum Science 2025年第1期22卷 384-397页

作者： Hong-Yan du Kai-He Lv Jin-Sheng Sun Mei-Chun Li Yuan Geng Xian-Bin Huang Hao-Kun Shen Muhammad Arqam Khan School of Petroleum Engineering China University of PetroleumEast ChinaQingdao266580ShandongChina Key Laboratory of Unconventional Oil&Gas Development Ministry of EducationQingdao266580ShandongChina CNPC Engineering Technology R&D Company Ltd. Beijing102206China Co-Innovation Center of Efficient Processing and Utilization of Forest Resources College of Materials Science and EngineeringNanjing Forestry UniversityNanjing210000JiangsuChina Department of Petroleum Engineering NED University of Engineering&Technology395007Pakistan

Oil-based drilling fluids possess excellent properties such as shale inhibition, cuttings suspension, and superior lubrication, making them essential in the development of unconventional oil and gas ***, wellbore instability, caused by the invasion of drilling fluids into shale formations, remains a significant challenge for the safe and efficient extraction of shale oil and gas. This work reports the preparation of mesoporous SiO2nanoparticles with low surface energy, utilized as multifunctional agents to enhance the performance of oil-based drilling fluids aimed at improving wellbore stability. The results indicate that the coating prepared from these nanoparticles exhibit excellent hydrophobicity and antifouling properties, increasing the water contact angle from 32°to 146°and oil contact angle from 24°to134.8°. Additionally, these nanoparticles exhibit exceptional chemical stability and thermal *** these nanoparticles into oil-based drilling fluids reduced the surface energy of the mud cake from 34.99 to 8.17 m J·m-2and increased the roughness of shale from 0.26 to 2.39 μm. These modifications rendered the mud cake and shale surfaces amphiphobic, effectively mitigating capillary infiltration and delaying the long-term strength degradation of shale in oil-based drilling fluids. After 28days of immersion in oil-based drilling fluid, shale cores treated with MF-SiO2exhibited a 30.5% increase in compressive strength compared to untreated cores. Additionally, these nanoparticles demonstrated the ability to penetrate and seal rock pores, reducing the API filtration volume of the drilling fluid from11.2 to 7.6 m L. This study introduces a novel approach to enhance the development of shale gas and oil resources, offering a promising strategy for wellbore stabilization in oil-based drilling fluid systems.

关键词： Fluorosilane Wettability Wellbore stability drilling engineering Self-cleaning Antifouling

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development and Application of Full Vector Geosteering Comprehensive Analysis Software-OneSteer 11th

Development and Application of Full Vector Geosteering Compr...

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11th International Field Exploration and development Conference, IFEdC 2021

作者： Lin, Wang Wu, dong Liu, Lifeng Zhu, Weixing Xue, Hongzhi CNPC Engineering Technology R&D Company Limited Beijing China PetroChina Research Institute of Petroleum Exploration and Development Beijing China

ISBN: (纸本)9789811921483

Horizontal well technology is a favorable means for the efficient development of "deep, low permeability, offshore, unconventional" and other complex reservoirs, and its key is to improve the drilling rate of the target geological body. Based on the analysis of the business process and requirements of geosteering, aiming at the geological characteristics of China's continental shale, carbonate and glutenite reservoirs, the key technical problems such as geo-steering based stratigraphic structure model modeling, main LWd instrument curve forward modeling, interactive geological model editing, dynamic extraction of stratigraphic parameters, multi-information fusion seismic inversion and so on have been solved, and a full vector geosteering comprehensive analysis software named OneSteer was developed. The software is applied to the field geo-steering analysis of carbonate reservoir in southwest of China and shale reservoirs in Xinjiang oilfields, which improves the drilling encounter rate, reduces the drilling risk, improves the drilling efficiency, and achieves satisfactory results. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Extraction

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research on Quantitative Method and Main Control Factors of drilling Crew Operation Effect 13th

Research on Quantitative Method and Main Control Factors of ...

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13th International Field Exploration and development Conference, IFEdC 2023

作者： Xiao, Yue Zhou, Tuo Jing, Ning Li, Hang-Yuan Wang, Gang Liu, Ji-Tong Ye, dong-Qing Zhong, Zhao Li, Bing-rou Jin, Yu-Lai Li, Gan-Lu Li, Jing CNPC Engineering Technology R&D Co. LTD. Beijing China PetroChina International Exploration and Development Co. LTD. Beijing China Beijing China Tianjin Petroleum Vocational and Technical College Tianjin China

ISBN: (纸本)9789819702558

The assessment of drilling crew is crucial for evaluating the operational effectiveness, improving management levels, and improving drilling operation quality and efficiency. Currently, most drilling crew operation evaluation only consider drilling speed and wellbore quality, which cannot fully reflect the overall operational effectiveness of the drilling crew and is not conducive to oilfield enterprises evaluating the operational effectiveness of the drilling crew. Based on sorting statistics and programming calculations methods, and considering the actual drilling site, a multi-level evaluation method for drilling crews was established to quantify the effectiveness of drilling crew operations and provide an evaluation method for multi drilling crew operation projects, considering key indicators such as drilling workload, drilling efficiency, drilling timeliness, wellbore quality control, and diesel consumption, which reflects workload, quality, efficiency, and economy respectively. A method for evaluating the main control factors of drilling operation performance was established based on the grey correlation analysis method, using the drilling crew score as the evaluation indicator for drilling crew operation performance. Taking XX Oilfield as an example, the performance of 8 drilling crews in XX Oilfield in 2020 was quantitatively scored. The analysis results showed that the order of evaluation for XX Oilfield in 2020 was: crew 2 > crew 4 > crew 3 > crew 5 > crew 1 > crew 6 > crew 7 > crew 8. Well quality is the main controlling factor affecting the performance of the drilling crew, and the evaluation results are in line with the actual situation of XX Oilfield. The multi-level drilling crew evaluation method established in this article provides assessment methods for multi-drilling crew operation projects and provides a theoretical basis for the formulation of operation management measures for project companies. © The Author(s), under exclusive license to Spring

关键词： Quality control

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Experimental Investigation of Control rod drops Into Perturbed Fuel Assemblies

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Journal of Nuclear Engineering and radiation Science 2023年第4期9卷 041801页

作者： Park, Namgyu Kwon, Ohjoon Yoo, Youngik Kim, Taesoon Nuclear Fuel Technology Department R&D Center KEPCO Nuclear Fuel Daedeok-daero 989 beon-gil Yuseong-gu Daejeon34057 Korea Republic of Nuclear Fuel Technology Department R&D Center KEPCO Nuclear Fuel 242 Daedeok-daero 989 beon-gil Yuseong-gu Daejeon34057 Korea Republic of SMR Development Unit Central Research Institute Korea Hydro & Nuclear Power Co. LTD 70 Yuseong-daero 1312 beon-gil Yuseong-gu Daejeon34101 Korea Republic of

This paper discusses permanent deformation of the fuel assembly of pressurized water reactors that have to satisfy a drop time requirement of the control rod assembly. during a seismic event, the fuel assemblies and the reactor core exhibit transient vibration. When the fuel assemblies collide, they develop impact forces in the spacer grids along the fuel assemblies. If the impact forces on some spacer grids of the fuel assembly exceed an allowable strength, the buckling occurs in the corresponding spacer grids, followed by permanent deformation. The geometry change of the buckled spacer grids leads to the movement of the guide tube positions in the fuel assembly. Therefore the geometry change is associated with the distortion of the control rod drop path. In this study, the permanent deformation of the spacer grids was measured during the impact tests, and the maximum deviation of the guide tube from the original position was investigated. Control rod drop tests were also performed to measure the change in drop time according to the deformation of the fuel assembly. Using actuators in the loop test facility, the authors realized the first and second bending mode shapes of the fuel assembly under the flowing water condition. Based on a series of drop tests, the critical fuel assembly deformation was identified that could lead to a violation of an allowable drop time of the control rod. Copyright © 2023 by ASME.

关键词： Control rods

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A micro-crosslinked amphoteric hydrophobic association copolymer as high temperature-and salt-resistance fluid loss reducer for water-based drilling fluids

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Petroleum Science 2024年第3期21卷 1980-1991页

作者： Jian Li Yu-Xi Ji Xiao-Xiao Ni Kai-He Lv Xian-Bin Huang Jin-Sheng Sun School of Petroleum Engineering China University of Petroleum(East China)Qingdao266580ShandongChina Key Laboratory of Unconventional Oil&Gas Development China University of Petroleum(East China)Qingdao26650ShandongChina Inspection and Testing Center of Huabei Oil Field Company PetroChinaRenqiu062552HebeiChina Drilling Fluid Research Institute CNPC Engineering Technology R&D Company LimitedBeijing102206China

during ultradeep oil and gas drilling,fluid loss reducers are highly important for water-based drilling fluids,while preparing high temperature-and salt-resistance fluid loss reducers with excellent rheology and filtration performance remains a ***,a micro-crosslinked amphoteric hydrophobic association copolymer(i.e.,dAdC)was synthesized using N,N-dimethyl acrylamide,diallyl dimethyl ammonium chloride,2-acrylamido-2-methylpropane sulfonic acid,hydrophobic monomer,and pentaerythritol triallyl ether *** to the synergistic effects of hydrogen bonds,electrostatic interaction,hydrophobic association,and micro-crosslinking,the dAdC copolymer exhibited outstanding temperature-and *** rheological experiments have shown that the dAdC copolymer had excellent shear dilution performance and a certain degree of salt-responsive viscosity-increasing *** dAdC copolymer could effectively adsorb on the surface of bentonite particles through electrostatic interaction and hydrogen bonds,which bring more negative charge to the bentonite,thus improving the hydration and dispersion of bentonite particles as well as the colloidal stability of the drilling ***,the drilling fluids constructed based on the dAdC copolymer exhibited satisfactory rheological and filtration properties(FLHTHP=12 m L)after aging at high temperatures(up to200℃)and high salinity(saturated salt)***,this work provided new insights into designing and fabricating high-performance drilling fluid treatment agents,demonstrating good potential applications in deep and ultradeep drilling engineering.

关键词： Fluid loss reducer Temperature-and salt-resistance Hydrophobic association Amphoteric Micro-crosslinking

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