Results 81 to 90 of about 161,873 (336)
Numerical Simulation on Rock Breaking of PDC Bit during Rotary Steerable Drilling
Shiyou jixie, 2021 When conventional PDC bits are used with rotary steerable tools, problems such as insufficient buildup rate and poor stability may occur, which seriously affect the normal operation of rotary steerable drilling systems.
He Wenhao +5 more
doaj
Advanced Healthcare Materials, EarlyView.This review explores how alternative invertebrate and small‐vertebrate models advance the evaluation of nanomaterials across medicine and environmental science. By bridging cellular and organismal levels, these models enable integrated assessment of toxicity, biodistribution, and therapeutic performance.
Marie Celine Lefevre +3 more
wiley +1 more source
MECHANICAL ANALYSIS OF THE DRILL BIT IN THE DUAL CASING SIDETRACKING
Jixie qiangdu, 2016 In the dual casing sidetracking,the oil casing wall,cement ring,technical casing wall and rock formations’ hardness are different,furthermore,in the process of dual casing sidetracking the bit in contact with the oil casing wall,cement ring,technical ...
KONG ChunYan, LIANG Zheng, ZHANG DeRong
doaj
Study on Rock Breaking Characteristics of a Hybrid Bit
Shiyou jixie, 2020 Existing conventional PDC and roller bits are unable to meet the rock breaking requirements in deep and hard formations, difficult-to-drill formations and soft and hard formations.
吴泽兵 +4 more
doaj
Thermal Processing Creates Water‐Stable PEDOT:PSS Films for Bioelectronics
Advanced Materials, Volume 37, Issue 13, April 2, 2025.Instead of using chemical cross–linkers, it is shown that PEDOT:PSS thin films for bioelectronics become water‐stable after a simple heat treatment. The heat treatment is compatible with a range of rigid and elastomeric substrates and films are stable in vivo for >20 days.
Siddharth Doshi +16 more
wiley +1 more source
STRUCTURAL OPTIMIZATION AND FATIGUE LIFE STUDY OF AIR HAMMER BIT
Jixie qiangduDue to the low fatigue life of the air hammer bit in the drilling process, the drilling efficieney is greatly reduced and the drilling cost is increased.
FENG ChunYu +5 more
doaj
Study on Dynamic Characteristics of drill String-drill Bit-rock System
Shiyou jixie, 2017 Drill bit, drill string and rock system as a whole, has coupled and interacted dynamic characteristics, which is neglected in most of researches. In view of this, considering the coupling of axial and lateral torsion of the lower drilling tool and the ...
Hu Zhiqiang +3 more
doaj
Ultrasonic Planetary Core Drill: Overview and Results from Field Trial [PDF]
, 2017 In the effort to explore the subsurface of terrestrial bodies, we seek to obtain better samples from ever greater depths. Many organisations are working towards technologies that can achieve this goal whilst ensuring compatibility with the likely ...
Harkness, Patrick +4 more
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The Promise of Solid Lubricants for a Sustainable Future
Advanced Materials, EarlyView.Lubricants are vital for technology, saving energy and resources. The industry seeks sustainable solutions beyond fossil fuels. Solid lubricants offer extremely low friction and reduce environmental impact, especially in harsh conditions. Can these solids truly replace liquid lubricants, or are they limited to extreme applications?
Philipp G. Grützmacher +7 more
wiley +1 more source
Аналіз відпрацювання доліт типу PDC на родовищах України і світу [PDF]
, 2008 Проанализировано использование и отработка долот типа РОС на месторождениях Украины и мира, построены регрессионные зависимости проходки от некоторых факторов: характеристики буримых пород, диаметра инструмента, осевой нагрузки, числа оборотов, объёма ...
Драганчук, О. Т. +1 more
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