Results 31 to 40 of about 235,371 (297)
Stability Analysis and Visual Application of Drill String Drag and Torque Test Device
Shiyou jixie, 2021 The nonlinear buckling of the drill string during drilling affects the safe and stable operation of the drag and torque test device. For the horizontal well drag and torque test device, based on the dynamic software ADAMS, combined with the force balance
Wu Zebing +5 more
doaj
Shiyou jixie, 2021 The stick-slip vibration of the horizontal well drill string system seriously threatens the safety of downhole drill strings and tools, reduces the drilling efficiency of the horizontal section, making the drill bit fail prematurely.
Zhu Jieran +5 more
doaj
Drill string rotary speed influence on equivalent circulating density value [PDF]
, 2018 Presented article displays a debate about very complex and still not fully understood issue of drill string rotary speed (DSRS) impact on pressure losses in wellbore annulus, thus Equivalent Circulating Density (ECD) value.
Kiebzak, P. +5 more
core +2 more sources
Western String Chamber Orchestra, November 14, 1996
, 2016 Recorded during a live performance at Dalton Center Recital Hall, Western Michigan University, Kalamazoo, Michigan, November 14, 1996, 8:00 p.m., the 137th concert of the School of Music's 1996-1997 season.Western String Chamber Orchestra, Bruce J ...
Western String Chamber Orchestra
core +2 more sources
Western String Chamber Orchestra, April 9, 1997
, 2016 Recorded during a live performance at Dalton Center Recital Hall, Western Michigan University, Kalamazoo, Michigan, April 9, 1997, 8:00 p.m., the 502nd concert of the School of Music's 1996-1997 season.Western String Chamber Orchestra, Bruce J. Uchimura,
Western String Chamber Orchestra
core +2 more sources
Implantable Ionic Memristors Based on Natural Polymer Heterojunctions
Advanced Functional Materials, EarlyView.We report an implantable natural polymer‐based ionic memristor composed of hyaluronic acid, chitosan, and PDMS. The device achieved 98.94% accuracy in MNIST classification while reducing training time by 36.8% compared with a conventional artificial neural network (ANN).
Dong‐yup Lee +6 more
wiley +1 more source
Petroleum, 2023 Improper drilling parameters may cause severe vibration of drill string which leads to reduce the rate of penetration and drilling tool premature failure accidents in the drilling process of ultra-deep well.
Yuan Li +4 more
doaj +1 more source
Helical Buckling of Drill-Strings [PDF]
MATEC Web of Conferences, 2018 This paper presents experimental and numerical investigations of the complex drill-string vibration, with particular attention to the helical buckling of drill-strings and its influence on the system dynamics. The analysis is conducted using a novel experimental drilling rig, capable of exhibiting of all major types of drill-string vibration, including
Kapitaniak, Marcin +2 more
openaire +3 more sources
Advanced Functional Materials, EarlyView.Borophene is introduced as a programmable 2D bio‐interface that organizes DNA through dual boron–sulfur and nucleobase interactions. This molecular architecture enables efficient long‐range nanosurface energy transfer, establishing new design principles for functional nano–bio interfaces and amplification‐free optical biosensing.
Teresa Aditya +11 more
wiley +1 more source
Analysis on Casing Wear Induced by Drill String Whirling during Workover Drill Grinding
Shiyou jixie, 2021 When the drill string rotates in the wellbore, it will whirl, collide with and rub against casing inwall, resulting in casing wear and reducing wellbore safety.
Cao Yinping +3 more
doaj