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Study on the technology of rotary drilling rig used for bored piles

Li Lin,Min Feng

Strategic Study of CAE 2010, Volume 12, Issue 4, Pages 33-36

Abstract: All the piles are constructed by rotary drilling rig.Based on the construction of the bridge, the paper analyses the construction techniques of rotary drillingrig, details the drilling mud, drilling rig's installation, drilling, and summarizes the features

Keywords： rotary drilling rig construction bored pile technology feature

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Development Path of Offshore Drilling Equipment in China

Liu Jian

Strategic Study of CAE 2020, Volume 22, Issue 6, Pages 40-48 doi: 10.15302/J-SSCAE-2020.06.006

Abstract:

China has made achievements in offshore drilling equipment, and it cannow develop the shallow-water drilling rigs independently.However, as far as deep-water drilling equipment is concerned, there still exists a big gap between ChinaTo accelerate the development of China’s offshore drilling equipment, this study first analyzesmachine, deep-water drilling machine, and new-type marine drilling machine; it then summarizes the development

Keywords： offshore drilling rig deep-water drilling rig development of equipment test sea test

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Investigation on drilling-grinding of CFRP

Yanming QUAN, Wenwang ZHONG

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 1, Pages 60-63 doi: 10.1007/s11465-009-0008-y

Abstract: Conventional drills have a very short life in the drilling of this kind of composites and the qualitymechanism of the two kinds of diamond tools is not like the cutting effect of the conventional solid twist drilling

Keywords： composites drilling-grinding cemented/plated diamond tool life machined quality

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Dynamic analysis of a rig shafting vibration based on finite element

Van Thanh NGO, Danmei XIE, Yangheng XIONG, Hengliang ZHANG, Yi YANG

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 3, Pages 244-251 doi: 10.1007/s11465-013-0264-8

Abstract: Taking a rig shafting as an example, this paper studies the lateral vibration of the rig shafting with

Keywords： Finite element method (FEM) lateral vibration rig shafting rotor-bearing system dynamic characteristics

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Soybean drying characteristics in microwave rotary dryer with forced convection

Ruifang WANG, Zhanyong LI, Yanhua LI, Jingsheng YE

Frontiers of Chemical Science and Engineering 2009, Volume 3, Issue 3, Pages 289-292 doi: 10.1007/s11705-009-0022-y

Abstract: A new hybrid drying technique by combining microwave and forced convection drying within a rotary drum, i.e., microwave rotary drying, was developed with the purpose to improve the uniformity of microwaveIn a laboratory microwave rotary dryer, rewetted soybean was utilized as experimental material to study

Keywords： cracking microwave rotary drying soybean

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Design and analysis of a new high frequency double-servo direct drive rotary valve

Muzhi ZHU,Shengdun ZHAO,Jingxiang LI

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 4, Pages 344-350 doi: 10.1007/s11465-016-0406-x

Abstract: The structure of the rotary valve has received considerable research interest because of its favorableThis paper studied the high frequency double-servo direct drive rotary valve (DDRV), and proposed a novel

Keywords： direct drive rotary valve computational fluid dynamics (CFD) flow regulation

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Technical advance and developmentof China geophysical equipment

Wang Tiejun,Hao Huimin,Li Guoqi,Luo Fulong,Tao Zhifei,Chen Lianqing,Hou Jinhai

Strategic Study of CAE 2010, Volume 12, Issue 5, Pages 78-83

Abstract:

The rapid growth of China petroleum industry has brought about the steady development of its geophysical equipment technology. For example, our seismic instrument has experienced its sixth upgrade. As a result, our geophysical equipment technology has met world advanced standards. After 20 years of painstaking efforts in R&D and by means of technology-introducing, digesting, absorbing, and innovating, some of our vibrator technologies have reached the world advanced level and still some have taken the world leading positions. Our seismic auxiliary equipment has much improved and earned its reputation in the global market after 30 years of independent R&D.

Keywords： industry geophysical prospecting equipment seismic instrument vibrator transportation vehicle seismic drillingrig

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Calculation and research on deepwater drilling riser flexural equation and natural frequency

Jiang Wei

Strategic Study of CAE 2011, Volume 13, Issue 5, Pages 66-73

Abstract: justify;">Flexural equation was established in this paper, which was based on application of deepwater drillingTherefore, simple calculation method for natural frequency of drilling riser was achieved.Free-hinged beam was taken as constraint condition of flexural equation combined with drilling stringPurpose of research was to provide reasonable design and selection for deepwater drilling riser, andprovide a more efficient and applied method, which would show guiding significance for deepwater drilling

Keywords： deepwater drilling drilling riser flexural equation natural frequency shape function

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The application of DX rotary and squeezed pile on railway bridge engineering

Zhang Dehua,Wang Mengshu

Strategic Study of CAE 2009, Volume 11, Issue 7, Pages 92-96

Abstract:

Squeezed pile with plates (being DX pile) is a new type pile that has been developed in recent years. Based on common cast-in-place pile, it adequately avails itself of the bearing capacity of each soil hard layer. According to the difference of design bearing capacity and engineering geological condition, it consists of plates by the squeezing equipment of hydraulic pressure in the different parts of DX pile. DX pile is a sort of change-section pile and is priority to shaft resistance between friction pile and shaft pile. Making use of the tip resistance of breaches and plates and shaft resistance around the branches is in order to add the shaft resistance and tip resistance. In situ test has shown that it can sharply improve the bearing capacity of pile. DX squeezed pile cannot only be applied in clay, silt, sand, weathering rock mass and residual deposits of soil, but also can be used in interactive layers of gravel,clay,and sand. The diameter of DX squeezed pile can be 400~2 000 mm,and the length of it can be more than 60 m. It is a new type of pile which has a bright future for application. Now it has got the extensive application in high building, bridge,civil engineering and high structure. Due to it's good bearing capacity and low settlements,it can an be applied and promoted to different foundation engineering of railway bridge engineering,and would get a good prospect of application and extension.

Keywords： DX pile DX rotary and squeezed pile bearing capacity

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The optimum drilling technique in the northeast area of Sichuan

Han Laiju,Ma Guangjun,Zhao Jinhai

Strategic Study of CAE 2010, Volume 12, Issue 10, Pages 44-49

Abstract: complicated, which causes many complex cases and accidents like lost circulation and collapse when drillingROP was slow and drilling cycle was long.deepwell in south China, through introducing and developing new technology and new tools, like gas drillingand vertical drilling equipments, combined with existing techniques such as underbalanced drilling,compound drilling, optimum drilling technique system fit for complicated deepwell in northeast area of

Keywords： northeast area of Sichuan optimum drilling gas drilling vertical drilling MPD with lower-densitydrilling fluid bit optimization compound drilling

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Effectiveness analysis and optimum design of the rotary regenerator for thermophotovoltaic (TPV) system

Xi WU, Hong YE, Jianxiang WANG, Jie HE, Jian YANG

Frontiers in Energy 2012, Volume 6, Issue 2, Pages 193-199 doi: 10.1007/s11708-012-0184-z

Abstract: The influence of the period of rotation on the effectiveness of the thermophotovoltaic (TPV) rotary regeneratorBased on the modified model, the influence of geometrical parameters of rotary regenerator on the effectivenessThe results demonstrate that the effectiveness increases with the increase of the rotary regenerator

Keywords： thermophotovoltaic (TPV) system rotary regenerator effectiveness carryover loss

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Performance of rolling piston type rotary compressor using fullerenes (C70) and NiFe

Ruixiang WANG,Yihao ZHANG,Yi LIAO

Frontiers in Energy 2020, Volume 14, Issue 3, Pages 644-648 doi: 10.1007/s11708-017-0453-y

Abstract: A novel way for a compressor to improve its coefficient of performance was proposed in this paper. Fullerenes (C70) and NiFe O nanocomposites were modified by span 80 and dispersed in refrigeration oil by solid grinding (SG). Besides, the tribological properties of the nanocomposites were investigated using a four ball friction tester. The results show that when the mass concentration of fullerenes nanocomposite is higher than 60 ppm and the concentration of nano-oil is 2 g/L, the friction coefficient decreases from 0.13 to 0.06 which means the wear is reduced. The coefficient of performance of the compressor under the air conditioning test condition can be raised by 1.23%.

Keywords： rotary compressor friction coefficient nanocomposite materials coefficient of performance fullerenes

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Co-pyrolysis of sludge and kaolin/zeolite in a rotary kiln: Analysis of stabilizing heavy metals

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 7, doi: 10.1007/s11783-021-1488-1

Abstract:

• Adding kaolin/zeolite promotes the formation of stable heavy metals.

Keywords： Co-pyrolysis Sewage sludge Heavy metals Rotary kiln Immobilization mechanism

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Effects of delamination in drilling glass/polyester composite

Mehdi GANJIANI, Majid SAFARABADI, Nabi MEHRI-KHANSARI, Hossein ORUJI

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 2, Pages 552-567 doi: 10.1007/s11709-021-0699-7

Abstract: Considering failures during machinery processes such as drilling, a precautionary analysis involvingeffect of mode delamination and corresponding interlaminar crack propagation was considered during the drilling

Keywords： delamination VCCT ARCAN specimen drilling mode II

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Novel precision piezoelectric step rotary actuator

LIU Jianfang, YANG Zhigang, ZHAO Hongwei, CHENG Guangming

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 3, Pages 356-360 doi: 10.1007/s11465-007-0062-2

Abstract: A novel piezoelectric (PZT) precision step rotary actuator was developed on the basis of PZT technologydistributed thin flexible hinge to solve problems such as ineffective anchoring/loosening, low step rotaryIt greatly improves the ability to drive the existing PZT step rotary actuator.

Keywords： developed stability ineffective anchoring/loosening technology piezoelectric