Results 21 to 30 of about 633,289 (344)
Energies, 2023 The exploration and development of new hydrocarbon deposits face increasing challenges, primarily driven by the shift away from hydrocarbons towards renewable energy sources like shallow geothermal deposits, wind farms, and photovoltaics.
Przemyslaw Toczek +3 more
doaj +1 more source
Electroplastic cutting influence on power consumption during drilling process [PDF]
, 2016 The aim of this study is to report the use of non-conventional material removal process technique. It was found that electropulses (EPs) assisted drilling process improves the material machinability based on the eletroplastic influence.
González Rojas, Hernan Alberto +3 more
core +2 more sources
Organic-rich shale in Lianggaoshan Formation: study on macroscopic and microscopic mechanical properties and mechanism of influencing factors [PDF]
Oil ShaleThis study investigates the mechanical properties of organic-rich shale from the Lianggaoshan Formation using uniaxial and triaxial tests, nanoindentation, and atomic force microscopy. Key parameters such as elastic modulus and hardness are analyzed with
Yangbing Li +7 more
doaj +1 more source
Full and half-wavelength ultrasonic percussive drills [PDF]
, 2018 Ultrasonic-percussive drills are a leading technology for small rock drilling applications where power and weight-on-bit are at a premium. The concept uses ultrasonic vibrations to excite an oscillatory motion in a free-mass, which then delivers ...
Harkness, Patrick +2 more
core +1 more source
An experimental study on the CO2/sand dry-frac process
Natural Gas Industry B, 2014 The CO2/sand dry-frac process is a waterless fracturing technology in which CO2 instead of water is used as fracturing fluid. The application of the technology abroad (in the USA and Canada) shows that it works well in stimulating low-pressure, low ...
Song Zhenyun +8 more
doaj +1 more source
Abundance analysis of cool extreme helium star: LSS 3378 [PDF]
, 2006 Abundance analysis of the cool extreme helium (EHe) star LSS 3378 is presented. The abundance analysis is done using LTE line formation and LTE model atmospheres constructed for EHe stars.
Asplund +17 more
core +2 more sources
Drilling Burr Minimization by Changing Drill Geometry [PDF]
Materials, 2020 This article presents an attempt to solve the problem of the formation of burrs and drilling caps in the process of drilling in difficult-to-cut materials, specifically in the titanium alloy Ti-6Al-4V. In order to eliminate these phenomena, a chamfer of specific length and angle was made on FANAR drill’s margin.
Emilia Franczyk +2 more
openaire +2 more sources
Magnetic Interference Correction Method for Dynamic Measurement of Steering Head and Its Application
Shiyou jixieDuring the operation of the rotary steering system， the magnetic interference faced by the steering head when performing dynamic measurement tasks mainly comes from two aspects： one is the magnetic influence of the internal current fluctuation of the M30
Zhu Jinsong +6 more
doaj +1 more source
You-qi chuyun, 2021 As the environmental protection requirements for surrounding sea areas of Tongming Strait are high, the crossing strata are complex and changeable, the underground fresh water and sea water appear alternately, the crossing section is long with large ...
Yuguang MING +5 more
doaj +1 more source
Development and Application of Drilling Shock Absorption and Stabilization Tool
Shiyou jixieDuring drilling in medium to deep strata， the complexity and poor drillability of these formations may lead to buckling and jumping of drilling tool， resonance fatigue of drill string， and low drilling efficiency.
Guan Yanlei +6 more
doaj +1 more source