Results 91 to 100 of about 972,039 (207)

The Rock Breaking Mechanism of a Combined High Voltage Electric Impulse-Pdc Bit Drilling Technology

Social Science Research Network, 2023
Wei-Ji Liu, Hai Hu, Xiaohua Zhu
semanticscholar   +1 more source

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
doaj  

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
doaj  

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
doaj  

Mechanisms underlying lateral force applied to a PDC cutter on a PDC drill bit during rotary rock breaking

Objective To improve the rock-breaking efficiency and durability of drill bits in the theoretical research on the optimal design of drill bits, the key is to systematically reveal both the rock-breaking mechanisms of polycrystalline diamond compact (PDC)
Xin, HAN, Wei, LIU, Jiusen, WEI, Deli, GAO   +3 more
core   +1 more source

Design and Drilling Simulation of Open-Hole Penetration PDC Bit

Shiyou jixie
Penetration bit is a key tool for dredging the wellbore during the re-entry operation of old wells.The wellbore is often lost due to frequent sidetracking of new holes during the open-hole penetration process in old wells.To solve this problem,an open ...
Xu Xiaofeng, Wu Yan, Song Wei, Kuang Yuchun, Liao Limei   +4 more
doaj  

Field Test of Torsion Impactorin Well Jinyue 7-1

Shiyou jixie, 2017
To address the issues of deep well drillingin China like low ROP and high cost, it is necessary to suppress the influence of "stick-slip vibration" on PDC bit.
Li Wei, Sun Wenfeng, Yan Tie, Chen Shichun, Li Yue   +4 more
doaj  

Impact of Rock Cuttings on Downhole Fluid Movement in Polycrystalline Diamond Compact (PDC) Bits, Computational Fluid Dynamics, Simulation, and Optimization of Hydraulic Structures

Fluids
The flow occurring at the bottom of a polycrystalline diamond compact (PDC) drill bit involves a complex process made up of drilling fluid and the drilled rock cuttings.
Lihong Wei, Jaime Honra
doaj   +1 more source

Test and Numerical Simulation Analysis of Vertical Wheel Assisted Drilling Unit

Shiyou jixie
In difficult-to-drill deep formations,PDC bits struggle to penetrate and have low rock-breaking efficiency,and provide poor bit azimuth stability in steering drilling.This paper presents a PDC bit with a wheel and axle integrated vertical wheel cutting ...
Yang Yan, Huang Kuilin, Song Dongdong, Huang Zequan, Qiu Shunzuo, Hu Jiaqi   +5 more
doaj  

Numerical Simulation of Downhole Particle Flow in Horizontal Well with PDC Bit

Shiyou jixie, 2019
In the deep shale gas horizontal well drilling, the low cutting carrying efficiency often lead to the problem of bit ball. To address the problem, the CFD-DEM coupling method is used to simulate the horizontal well flow field between PDC bit and ...
Kuang Yuchun, Zhang Rui, Luo Jinwu, Zhu Guanghui   +3 more
doaj