Results 51 to 60 of about 1,493 (183)

Simulation Study on the Drilling of PDC Bit at Compound Drilling Condition

Shiyou jixie, 2016
The forces on the PDC bit at the bottomhole could impact the PDC bit drilling efficiency and cutter wear.The cutter-rock interactions could be more complex in compound drilling mode.A new PDC bit drilling simulation method for compound drilling based on ...
Zheng Jiawei, Kuang Yuchun, Wang Xia, Zou Ziyou, Chen Yuzhong, Yang Yingxin   +5 more
doaj  

Improving breaking efficiency of hard rock: Research on the mechanism of impact-shear rock breaking technology

Energy Exploration & Exploitation
To expedite drilling operations in hard rock of coal mines, a new type of impact-shear drill bit was developed, and its mechanism of speed-up and efficiency increase was studied.
Pei Ju, Dongzhuang Tian
doaj   +1 more source

Cutting Test Device for PDC Bit with Mixed Cutter Arrangement

Shiyou jixie, 2019
The existing PDC bit single-cutter test device is very inconvenient to adjust the parameters such as single-cutter rake angle. It is necessary to carry out frequent replacement of multiple sets of tools, which is not suitable for the mixed cutting ...
Liu Zhong, Hu Wei, Miao Mingcai, Hou Huihui   +3 more
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Study on the Wear Law of PDC Bits in Conglomerate

Shiyou jixie, 2020
A simplified model of dual-cutter PDC bits was established to model how the PDC bit is being worn when drilling into dense conglomerate. Then the rock breaking process was investigated using an Archard wear model and finite element software, and how the ...
Huang Peng, Guan Feng, Zheng Liwei, Wang Lili, Yang Minghe   +4 more
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Customized Design and Application of High ROP Bit for Deep Shale Gas

Shiyou jixie
As the development scale of shale gas expands， improving the rate of penetration （ROP） of deep shale gas has become the key to improving development efficiency， and designing more targeted bit based on formation characteristics is an effective means to ...
Zhu Xiaohua, Deng Kaichuang, Liu Weiji, Li Ke, Li Yuanjun, Chen Wei, Yan Juntao   +6 more
doaj   +3 more sources

Optimization Design Method of PDC Bit Based on Impact Failure Mechanism

Shiyou jixie
To enhance the anti-failure capability of PDC bits and extend bit service life， the main impact characteristics of PDC cutters in different regions of the bit were investigated.
Shi Jiangang Liu Yingbiao Xi Chuanming Guo Yong Wu Desheng
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Study on Mechanism of Stick–Slip Vibration Based on Torque Characteristics of PDC Bit

Applied Sciences
Stick–slip vibration (SV) of drill string systems is the main cause of fatigue failure of PDC bits under complex drilling conditions. Exploring its mechanism is helpful for identifying the causes of bit failure and developing preventive measures to ...
Lijun Li, Chunliang Zhang, Aixuan Wu
doaj   +1 more source

Research and Application of Ridged Diamond Element Bit

Shiyou jixie, 2018
To address the problems of cylindrical PDC cutters like thermal wear, impact damage and balling and the required high WOB for conical cutters, the ridged diamond element drill bit technology is studied.
Feng Songlin, Fan Song, Bao Lijun, Hou Baodong   +3 more
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Analysis on Fluid-Solid-Thermal Coupling Field in Rock Breaking Under Composite Impact Loads Based on Simulation Model

Shiyou jixie
In order to reveal the rock-breaking mechanism of full-size PDC bit under composite impact loads,from the perspective of temperature,a simulation model of fluid-solid-thermal coupling in rock breaking of PDC bit under composite impact loads was built ...
Cao Jifei, Zou Deyong, Li Cheng, Wang Hanxiang, Che Jiaqi, Zhang Weiqiang, Huang Zhe   +6 more
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An Experimental and Numerical Simulation Study on Rock Cutting Based on Pre-Breaking

Shiyou jixie, 2019
The design of the mixed-cutter placement can only rely on the engineering experience. The combination of experiment and numerical simulation is used to study the rock breaking force and rock breaking efficiency of the PDC cutter under different pre ...
Liu Zhong, Hou Huihui, Hu Wei
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