Results 131 to 140 of about 161,873 (336)

New Bit with Rolling PDC Cutter

Shiyou jixie, 2016
The new rolling PDC cutter drill bit technology could effectively address the fixed cutter eccentric wear issue,prolong durability,improve ROP,resulting in improved drilling efficiency and reduced drilling costs,which is a great step of drill bit ...
Shi Jiangang, Wu Xingyong, Dang Wenhui, Deng Ping, Liu Gang   +4 more
doaj  

ABAQUS-Based Simulation and Performance Analysis of Composite Bridge Plug Drilling

Shiyou jixie, 2020
In order to improve the safety, reliability and efficiency of composite bridge plug drilling, by taking the carbon fiber composite bridge plug and bit with cylindrical cutters as the researching objects, finite element simulation of composite bride plug ...
Shen Rufang, Ma Weiguo, Chen Ting
doaj  

Effects of Bit Shape of Electroplated Diamond Tool Used for Drilling Small Diameter Holes in Glass Plate on Machining Fluid Flow and Chip Discharge

, 2023
Tappei Oyamada, A. Mizobuchi, Toru Ishida   +2 more
openalex   +1 more source

Push-and-Twist Drillstring Assemblies [PDF]

, 2017
Deep drilling using a rigid drillstring requires the assembly and disassembly of multiple drill pipes. The interfaces between these pipes provide a challenge for automation because they must transmit large drilling forces and movements while, at the same
Firstbrook, David G., Harkness, Patrick, Li, Xuan, Lucas, Margaret, Timoney, Ryan, Worrall, Kevin   +5 more
core  

Wireless Power Transfer Modalities for Implantable Bioelectronics: Electromagnetic, Acoustic, and Magneto‐Dynamic Perspectives

Advanced Materials Technologies, EarlyView.
This review traces the evolution of wireless power transfer (WPT) for implantable medical devices, spanning electromagnetic, magnetoelectric, acoustic, and magneto‐dynamic systems. Quantitative comparisons of power, distance, and device scale highlight trade‐offs across modalities, while emerging hybrid mechanisms reveal strategies to overcome ...
Junyeop Kim, Yoonseok Park
wiley   +1 more source

Modelling and Simulating Eulerian Venturi Effect of SBM to Increase the Rate of Penetration with Roller Cone Drilling Bit [PDF]

, 2023
Dennis Delali Kwesi Wayo, Sonny Irawan, Alfrendo Satyanaga, Ghulam Abbas   +3 more
openalex   +1 more source

Rock drill for recovering samples [PDF]

, 1969
Rotary impact-type rock drill for recovering rock ...
Ford, A. G.
core   +1 more source

End‐to‐End Sensing Systems for Breast Cancer: From Wearables for Early Detection to Lab‐Based Diagnosis Chips

Advanced Materials Technologies, EarlyView.
This review explores advances in wearable and lab‐on‐chip technologies for breast cancer detection. Covering tactile, thermal, ultrasound, microwave, electrical impedance tomography, electrochemical, microelectromechanical, and optical systems, it highlights innovations in flexible electronics, nanomaterials, and machine learning.
Neshika Wijewardhane, Lyn I. Jones, Richard M. Martin, Helen Winter, Faezeh Arab Hassani   +4 more
wiley   +1 more source

Designing the ejector pellet impact drill bit for hard and tough rock drilling [PDF]

, 2015
A V Kovalyov, S. Ya. Ryabchikov, Ye D Isaev, F R Aliev, M V Gorbenko, A B Strelnikova   +5 more
openalex   +1 more source

Наддолотные амортизаторы [PDF]

, 2010
Наддолотні амортизатори (демпфери) використовують для зменшення амплітуди вібрацій бурового снаряду. Використання амортизаторів збільшує ресурс бурового долота на 20...30 % при збільшенні продуктивності буріння свердловини.The hole shock absorbers ...
Ганкевич, В. Ф., Драбан, Д. И., Островский, И. Р., Сирик, В. Ф., Титов, А. А.   +4 more
core