Results 161 to 170 of about 801 (206)

A review of vibration analysis and its applications. [PDF]

Heliyon
Chu T, Nguyen T, Yoo H, Wang J.
europepmc   +1 more source

An Amide-Carboxylic Acid Compound as Gel Structure Breaker to Improve the Rheology of Oil-Based Drilling Fluids. [PDF]

Gels
Zhang Y, Lv K, Huang X, Li Z, Zhang Y, Yuan Z.   +5 more
europepmc   +1 more source

UCST-Activated Network Reinforcement in Hybrid Microgels for Smart Plugging. [PDF]

Gels
Du M, He H, Wang Q, Sheng K, Jiang G, He Y.   +5 more
europepmc   +1 more source

Study on sand particle transport characteristics below the screw pump in a sand producing oil well based on laboratory experiments and numerical simulations. [PDF]

Sci Rep
Zhiliang W, Zhenhua W, Zhensong W, Manlai Z, Ruiquan L.   +4 more
europepmc   +1 more source

Investigation of Friction and Erosion Wear Properties of Titanium and Titanium Alloy Pipes. [PDF]

Materials (Basel)
Mao T, Yu Z, Yan J, Xu Y, Zhang S, Peng L.   +5 more
europepmc   +1 more source

Wireless Underground Sensor Communication Using Acoustic Technology. [PDF]

Sensors (Basel)
Al Moshi MA, Hardie M, Choudhury T, Kamruzzaman J.   +3 more
europepmc   +1 more source

Inverse problems in drill-string torsional vibration [PDF]

, 2020
In this study, a method is developed to better model drill-string torsional vibration by using data to calibrate a Partial Differential Equation (PDE) based model. Drill-string vibration is a complex phenomenon that is widely studied with several approaches to model the complexities encountered in real life.
Alrasheed, Abdulmalik
openaire   +3 more sources

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An Analytical Study of Drill-String Vibration

Journal of Engineering for Industry, 1960
Longitudinal and torsional vibrations in a drill string consisting of drill pipe and collars, and the boundary conditions at the ends of the string, are discussed. A trial-and-error method of solution for the natural frequencies is demonstrated. Since it is very lengthy, certain useful charts are then derived, and a graphical method of solution for the
J. J. Bailey, I. Finnie
exaly   +2 more sources

PASSIVE VIBRATION CONTROL OF PERIODIC DRILL STRING [PDF]

, 2017
In this dissertation, the stop and pass bands (i.e. the band gaps) characteristics are determined for gyroscopic systems by developing an approach which is compatible with such class of systems which is based on the concept of Bloch wave propagation in periodic structures.
Alsaffar, Yaser A.
openaire   +3 more sources