Results 101 to 110 of about 9,104 (217)

Vibration Damage Analysis of Bottom Hole Assembly Under Axial Impact Based on Dynamic Analysis

Applied Sciences
Impact Drilling Technology is one of the most effective methods for enhancing the penetration rate and efficiency in hard rock formations. Downhole axial vibration impact tools can provide a stable impact load, but they also increase the complexity of ...
Qilong Xue, Yafeng Li, Jianbo Jia, Lun Zhao   +3 more
doaj   +1 more source

Modelling of Nonlinear Torsional-Flexural Vibrations of Drill Strings

International Journal of Mathematics and Physics, 2015
Nonlinear flexural-torsional vibrations of shallow drill-strings are investigated. The drill-string is represented as an elastic rod rotating at constant angular velocity under the action of the longitudinal compressive force. The nonlinear model of flexural and torsional vibrations of drill-string is constructed on the basis of the theory of finite ...
A.S. Sergaliyev, L.A. Khajiyeva
openaire   +1 more source

Побудова математичної моделі компенсатора вертикальних переміщень бурильної колони підкронблочного типу [PDF]

, 2014
Буріння свердловин в умовах надглибокого моря має низку особливостей в порівнянні із аналогічним процесом на суші, основною із яких є неможливість забезпечення стаціонарного положення бурової установки над свердловиною внаслідок її хитавиці.
Слабий, О. О.
core  

Спектр поздовжніх коливань бурильної колони [PDF]

, 2014
Запропоновано математичну модель параметричних коливань бурильної вежі з урахуванням всіх її елементів, а також залежність процесів буріння від параметрів елементів механічної системи.
Векерик, В. І., Левчук, К. Г., Мойсишин, В. М.   +2 more
core  

Feasibility of decreasing pipe sticking probability using nanoparticles [PDF]

, 2009
U članku je prikazana nova metoda za sprečavanje ili smanjivanje mogućnosti prihvata cijevi u bušotini tijekom izrade naftnih i plinskih bušotina. Ova metoda, primjenjiva na vertikalne i koso umjerene bušotine, uključuje nanočestice u sastavu isplake za ...
Abouzar Mirzaei Paiaman, Bandar Duraya Al-Anazi   +1 more
core   +1 more source

Natural Frequency Analysis of a Stepped Drill String in Vertical Oil Wells Subjected to Coupled Axial–Torsional–Lateral Vibrations

Energies
Drilling oil and gas wells is a complex process that requires a combination of several parameters to dig into the ground. Inappropriate drilling parameter settings and reaction forces can lead to unwanted vibrations, which can negatively impact the drill
Mohamed Zinelabidine Doghmane
doaj   +1 more source

Determination of the characteristics of drill string vibrations during the drilling process

Technology audit and production reserves
The object of research is vibration processes of a certain origin in the drill string with typical design deviations depending on the mode parameters of drilling. A drill string is an oscillating system with an infinite number of degrees of freedom of a multifactor system.
Oleksandr Titlov, Viktor Svitlytskyi, Sergii Iagodovskyi   +2 more
openaire   +1 more source

Research on Stick-slip Vibration Level Estimation of Drillstring Based on SVM

Shiyou jixie, 2019
To evaluate the severity of stick-slip vibration of drill string, a risk assessment method based on factor analysis (FA) and support vector machine (SVM) is proposed.
Chen Chong, Zhang Shimin, Peng He, Cui Can, Liu Yang   +4 more
doaj  

Index to NASA Tech Briefs, January - June 1966 [PDF]

, 1966
Index to NASA technological innovations for January-June ...

core   +1 more source

Microgravity: A Teacher's Guide With Activities in Science, Mathematics, and Technology [PDF]

, 1997
The purpose of this curriculum supplement guide is to define and explain microgravity and show how microgravity can help us learn about the phenomena of our world.
Rogers, Melissa J. B., Vogt, Gregory L., Wargo, Michael J.   +2 more
core   +1 more source