Results 21 to 30 of about 345,800 (104)
Spectral Analysis of the Infinite-Dimensional Sonic Drillstring Dynamics
Mathematics, 2023 By deploying sonic drilling for soil structure fracturing in the presence of consolidated/ unconsolidated formations, this technique greatly reduces the friction on the drillstring and bit by using energetic resonance, a bit-bouncing high-frequency axial
Kaïs Ammari, Lotfi Beji
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Nonlinear Dynamics in Drilling Engineering
, 2021 Shock and Vibration, Volume 2021, Issue 1, 2021.
Qilong Xue +3 more
wiley +1 more source
Journal of Earth Energy Engineering, 2021 Drillstrings often vibrate severely and tend to twist off during hard rock drilling. Therefore, dynamic testing is crucial in the design of drilling systems. Designers tend to employ the most powerful analytical tools, using the most elaborate electronic
Mejbahul Sarker
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Investigating Drillstring Vibration and Stability in Coring Drilling
Energies, 2022 Transverse vibration of drillpipe in coring drilling is undesirable. Here, the influence of the core on drillpipe vibration is considered for the first time.
Yuchen Sun +5 more
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New Damped-Jerk trajectory for vibration reduction [PDF]
, 2014 This paper derives a jerk-shaped profile to address the vibration reduction of underdamped flexible dynamics of motion system. The jerk-limited profile is a widespread smooth command pattern used by modern motion systems.
BEAREE, Richard
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Design of a Testing Facility for Investigation of Drill Pipes Fatigue Failure
The Journal of Engineering Research, 2017 Drillstring and down-hole tool failure usually results from failing to control one or more of the vibration mechanisms. The solution starts with the ability to measure different modes of vibration, hence identifying different vibration mechanisms ...
Jamil Abdo +3 more
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Investigation of drillstring vibration reduction tools [PDF]
, 2012 Drilling related problems such as drillstring vibration is an important cause of premature failure of drillstring components and drilling inefficiency. The vibration of drillstring interferes with measurement collected while drilling.
Al Dushaishi, Mohammed Fayez
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Vibration analysis of simultaneous drilling and reaming BHA
Journal of Petroleum Exploration and Production Technology, 2020 The drillstring used in the oil and gas exploration is a complex structure due to the different forces acting on it. One of the primary sources of drillstring vibrations is the cutting forces caused by the drill bit contact with the rock formation.
Mohammed F. Al Dushaishi +1 more
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Effects of axial impact load on the dynamics of an oilwell drillstring
Advances in Mechanical Engineering, 2019 This article studies the dynamics of oilwell drillstring under large and small axial impact loads. For the case of large impact load, the drillstring is regarded as a continuous bar under the impact load of a falling mass, and the energy conservation ...
Liping Tang, Xiaohua Zhu, Hongzhi Lin
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Petroleum, 2022 The self-excited stick-slip oscillations of oilwell drillstrings are attributed to the nonlinear interaction between the drill-bit and the rock formation.
Mohammed Y.A. Alkaragoolee, David Bryant
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