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Research and development on foam breaking and recycling technology in air-foam drilling

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Global Geology 2009年第4期12卷 204-209,214页

作者： cao pinlu ZHANG Jincheng WU Xia HUANG Jinyun Institute of Drilling Engineering Technology Zhongyuan Petroleum Exploration Bureau Puyang 457001 Henan China

In recent years,air-foam combining the advantages of both liquid and air drilling has been utilized as a drilling medium. Air-foam drilling has proved its efficiency in numerous situations where serious problems were encountered,such as in fractured formations and depleted or high permeable zones. However,the major disadvantage of air-foam drilling system is that the foam can only be used once,so that an extremely large pit is required to contain the foam to allow sufficient room for cuttings and for the foam to dissipate. Moreover,it needs enormous volume prepared,consuming abundance of water and ingredient additives,which results in the high cost of foam drilling. The recycling foam fluid by using foam breaking technology is the only effective method to solve these problems associated with the known foam drilling. Various types of equipment and technique have been employed to suppress foam formation in biological and process equipment in foam drilling. The study described various methods of foam breaking technology,and the trend of the foam breaking technology for foam drilling is discussed.

关键词： air-foam drilling foam breaking recycling

Tooth arrangement design of retractable DTH hammer bit used for drilling while casing

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Global Geology 2023年第1期26卷 40-46页

作者： ZHANG Boyao CHEN Baoyi YANG Da BO Kun cao pinlu College of Construction Engineering Jilin UniversityChangchun 130061China

Down-the-hole(DTH)hammer with casing while drilling(CWD)is a technology that has been proven to be able to alleviate many of the problems faced by complex ***,the drill bit is suffered from rapid wear,low drilling efficiency,and high energy consumption due to the unreasonable tooth arrangement and impact energy selection in drilling process,which affect the application effect of this *** software was used for numerical simulation of rock breaking behavior under impact load with the single,three,and five teeth arrangement drill bit respectively,to improve the application effect and solve the aforementioned technical *** on the calculated parameters of tooth arrangement,we designed a novel drill bit for hard rocks and provided a theoretical basis for the tooth arrangement of largediameter drill bits.

关键词： casing while drilling drill bit tooth arrangement rock breaking ABAQUS

Reliability analysis of retractable drill bit with air reverse circulation used for drilling while casing

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Global Geology 2023年第1期26卷 47-56页

作者： WANG Minqi YIN Qilei CHEN Baoyi QI Bo BO Kun cao pinlu College of Construction Engineering Jilin UniversityChangchun 130026China

Casing-while-drilling(CWD)with down the hole(DTH)hammer drilling technology has been widely used in unconsolidated formations,due to its advantages in protecting the borehole wall,excellent rock cuttings capacity,and fast penetration rate in hard *** an important component of the CWD system,the structure of the retractable drill bit needs not only to ensure to form stronger reverse circulation,but also to be expandable or retractable as needed,otherwise the drill bit cannot be lift and put down smoothly in the casing,and may lead to drilling *** paper developed a new type of reverse circulation DTH hammer drill bit used for CWD drilling *** retractable performance of this type of drill bit is studied using ADAMS *** results show that it is smoothly expandable and retractable as designed under the conditions of the weight of the bit(WOB)of 0.5–2.0 t and the rotation speed of 30–60 r/*** investigate the reverse circulation effect of the drill bit,Fluent software was used to simulate the flow characteristic inside *** simulation results indicated that it can form strong reverse circulation,and the entrainment ratio h can reach 9.5%.

关键词： DTH hammer drilling air reverse circulation casing-while-drilling retractable drill bit

Viscosity testing method of ultra-low temperature drilling fluids for polar glacier drilling

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Global Geology 2012年第4期15卷 276-280页

作者： HAN Lili XU Huiwen cao pinlu YU Dahui P.G.Talalay College of Construction Engineering Jilin University

According to the working environment of the polar glacier core drilling, a separatory funnel capillary viscometer which can be used for testing the viscosity of liquids under ultra-low temperature conditions was de- signed. This viscometer has a simple structure and it is easy to operate, which can meet the testing requirements of different temperature conditions. The viscosity of the dimethyl silicone oil KF-96L-2.0cs was measured under different temperatures using this designed viseometer, and it is found that the viscometer coefficient K changes linearly with temperature. This testing method has relatively high test accuracy and its relative error is less than 4%, which can be used to test the viscosity of the different liquids in ultra-low temperature conditions.

关键词： polar drilling separatory funnel-capillary viscometer viscosity dimethyl silicone oil viscometer coefficient

Improvements of drilling fluid processing for cable-suspended electromechanical drills

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Global Geology 2013年第2期16卷 99-105页

作者： YU Dahui Pavel Talalay XU Huiwen cao pinlu Mikhail Sysoev HAN Lili HAN Junjie Polar Research Center Jilin University College of Construction Engineering Jilin University

Deep ice drilling in Polar Regions plays a key role in paleo-climate, microbiological and glaciological researches. For deep ice and subglacial coring the special purpose-built electromechanical cable-suspended drills with bottom-hole circulation are designed and explored. Used at present drilling fluid circulation systems are specified by very high fluid wastes during processing. Measurements in deep drilling projects in Antarctic and Greenland ice sheets showed that 25%-40% of the drilling fluid, pumped into the hole, is retrieved to the surface with cable and drill, and up to 45% of retrieved fluid goes to waste. This leads not only to increasing of the fluid consumption and cost of the project in general but also to severe contamination of air, surface and near-surface snow-firn layers at the drilling site. In order to reduce wastes and environmental impact, it is proposed to modify drilling fluid processing system by avoiding of evaporation and leakages of fluid as far as practicable. Drilling fluid is prepared and pumped into the hole according to predetermined program on semiautomatic mode, and volume and density of blended and pumped into the hole drilling fluid are measured continuously. Components of the drilling fluid are stored and mixed in the special closed containers equipped by pressure relief valves. Separation of drilling fluid from ice cuttings is carried out by two steps: firstly, fluid is separated with hydro extractor and then with thermal separator. To reduce the amount of removed drilling fluid with cable special squeezing collar is installed on the borehole mouth. All these arrangements are able to decrease drilling fluid wastes in many times.

关键词： polar drilling drilling fluid cable-suspended electromechanical drill

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冲击挤密作用下土体变形机理的有限元分析

煤田地质与勘探 2009年第2期37卷 36-38页

作者：孙庆曹品鲁殷琨同济大学地下建筑与工程系上海200092 中原石油勘探局钻井工程技术研究院河南濮阳457001 吉林大学建设工程学院吉林长春130026

潜孔锤冲击挤密钻进过程中土体变形机理的分析是非常复杂的,既涉及到材料非线性、几何非线性,又涉及到界面接触摩擦,属于高度非线性问题。利用有限元分析软件ANSYS初步建立了潜孔锤在土中冲击挤密钻进的有限元模型,模拟分析了钻具周围... 详细信息

潜孔锤冲击挤密钻进过程中土体变形机理的分析是非常复杂的,既涉及到材料非线性、几何非线性,又涉及到界面接触摩擦,属于高度非线性问题。利用有限元分析软件ANSYS初步建立了潜孔锤在土中冲击挤密钻进的有限元模型,模拟分析了钻具周围土体的应力、应变位移情况。结果表明,冲击钻进过程中钻头下方土体随压力的不断增大而发生塑性流动,产生急剧变形而破坏。钻具周围的土被重塑和扰动,土的工程性质发生了较大的变化,孔壁周围比较密实稳定。

关键词：冲击挤密有限元 ANSYS 土体变形

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阶梯式钻头挤土机理的有限元分析

煤田地质与勘探 2009年第3期37卷 74-77页

作者：曹品鲁殷琨高科王文龙中原石油勘探局钻井工程技术研究院河南濮阳457001 吉林大学建设工程学院吉林长春130026

为了分析阶梯钻头冲击挤密作用下土体的变形机理,将土体视为DP材料,服从Drucker-Prager屈服准则,通过钻具与土体之间的接触以及施加冲击载荷来模拟钻进过程,建立了潜孔锤冲击挤密钻进的有限元模型。以非线性瞬态动力学有限元分析为手段... 详细信息

为了分析阶梯钻头冲击挤密作用下土体的变形机理,将土体视为DP材料,服从Drucker-Prager屈服准则,通过钻具与土体之间的接触以及施加冲击载荷来模拟钻进过程,建立了潜孔锤冲击挤密钻进的有限元模型。以非线性瞬态动力学有限元分析为手段,利用有限元软件ANSYS9.0对阶梯钻头冲击挤密作用下土体的变形机理进行了模拟分析。结果表明,在冲击载荷作用下,冲击功主要用于竖向压缩土体,水平方向的挤压作用相对较小。阶梯钻头对土体的破坏作用可以看作是每个台阶的微剪切作用,当台阶布置合理时,土体沿等效锥面整体破坏,破坏后的土体在等效锥面的作用下被挤向孔壁四周,挤密效果较好。

关键词：挤土效应变形机理有限元阶梯钻头

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人工神经网络在基坑变形性状研究中的应用

城市道桥与防洪 2005年第2期 108-110页

作者：韩冰陈晨曹品鲁吉林大学建设工程学院吉林长春130026

基坑工程不仅要保证维护结构本身的安全,而且要保证周围建(构)筑物的安全和正常使用。开展基坑工程变形性状研究具有重要意义。影响基坑变形的因素很复杂,传统的计算方法已无法准确预测基坑的变形。人工神经网络(ANN)有很强的解决非线... 详细信息

基坑工程不仅要保证维护结构本身的安全,而且要保证周围建(构)筑物的安全和正常使用。开展基坑工程变形性状研究具有重要意义。影响基坑变形的因素很复杂,传统的计算方法已无法准确预测基坑的变形。人工神经网络(ANN)有很强的解决非线性问题的能力。近些年来基于ANN的方法在岩土工程中得到了广泛的应用。本文对ANN在基坑工程中的应用研究进行了综述,并对其发展方向进行了分析。

关键词：基坑工程人工神经网络应用研究发展方向

工程教育专业认证背景下地质工程类课程思政系统化设计与实践

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高校学生工作研究 2022年第1期 80-88页

作者：博坤曹品鲁陈宝义吉林大学建设工程学院

工程教育专业认证结合课程思政建设的教学实践,为工科专业高等教育的人才培养和改革方向提供了根本遵循,也从方法上回答了“培养什么人、怎样培养人、为谁培养人”的问题。吉林大学地质工程专业开展了系统化的课程思政建设工作,确定了... 详细信息

工程教育专业认证结合课程思政建设的教学实践,为工科专业高等教育的人才培养和改革方向提供了根本遵循,也从方法上回答了“培养什么人、怎样培养人、为谁培养人”的问题。吉林大学地质工程专业开展了系统化的课程思政建设工作,确定了符合学校定位的、可量化的人才培养目标,构建了专业核心价值体系。通过分析专业认证的核心思想及毕业要求与课程思政的关系,构建了合理的课程思政实施方案,在知识传授和能力培养中实现价值引领,真正发挥好课程育人的作用。

关键词：课程思政专业认证工程教育教学实践