Results 51 to 60 of about 136,396 (361)
Experimental research into the effect of some operation factors and rock properties on the rate of penetration [PDF]
, 2020 Purpose. The purpose of this research is to investigate the effect of weight on bit (WOB), rotary speed (RPM), and some rock properties on the rate of penetration (ROP). Methods.
Ali, Mahrous A.M. +4 more
core +1 more source
Advanced Engineering Materials, EarlyView.High‐temperature interactions between low‐sulfur Al‐killed Mn–B steel and MgO–C refractories (0 and 50 wt% recyclates) are studied via finger immersion tests (1600 °C). Surface‐active elements influence infiltration. MgO/CaS layer forms, along with spinel and calcium silicate.
Matheus Roberto Bellé +5 more
wiley +1 more source
Zuanjingye yu wanjingyeLost circulation in reservoir drilling has been encountered in deep coalbed methane drilling in the east of Junggar Basin (Xinjiang) because the reservoir formations have insufficient pressure bearing capacity.
Yingbiao LIU +6 more
doaj +1 more source
Quantum Emitters in Hexagonal Boron Nitride: Principles, Engineering and Applications
Advanced Functional Materials, EarlyView.Quantum emitters in hexagonal boron nitride have emerged as a promising candidate for quantum information science. This review examines the fundamentals of these quantum emitters, including their level structures, defect engineering, and their possible chemical structures.
Thi Ngoc Anh Mai +8 more
wiley +1 more source
Lost Circulation Prediction Based on Long Short-Term Memory Network and Random Forest Algorithm
Zuanjingye yu wanjingyeLost circulation is one of the key factors restricting drilling safety and efficiency. To realize accurate prediction of lost circulation, a hybrid model for the prediction of lost circulation is presented based on long short-term memory (LSTM) and ...
Aiting CAI +4 more
doaj +1 more source
Influence of Platform Motion to Pressure Fluctuation of Downhole Drilling Fluid
Shiyou jixie, 2022 Riserless drilling technology controls the liquid level of drilling fluid in the rotary blowout preventer by controlling the rotating speed and flow rate of the seabed drilling fluid lift pump,so as to control the wellbore pressure.In view of the ...
Wang Chuan +5 more
doaj
Advanced Functional Materials, EarlyView.Electric control of magnetic tunnel junctions offers a path to drastically reduce the energy requirements of the device. Electric field control of magnetization can be realized in a multitude of ways. These mechanisms can be integrated into existing spintronic devices to further reduce the operational energy.
Will Echtenkamp +7 more
wiley +1 more source
Zuanjingye yu wanjingyeThe production rate of a shale gas well generally declines fast, resulting in a low average recovery of the well. Refracturing of an old well with shale gas production pressure depletion can effectively enhance the ultimate recovery of the well, and ...
Xin JIN +4 more
doaj +1 more source
Advanced Functional Materials, EarlyView.Most matter is nominally frozen in the polar regions or space, and liquid crystal materials are no exception. Consequently, soft actuators, including liquid crystal elastomers (LCEs), are inoperative under such extreme cold in response to stimuli, as their motion relies on mechanical deformation.
Hyeonseong Kim +5 more
wiley +1 more source
Zuanjingye yu wanjingyeGas wells drilled in the Gaoshiti block of the Southern Sichuan Gas District have encountered serious formation blocking problem, resulting in significant decline in the gas production.
Yu HE +5 more
doaj +1 more source