Results 31 to 40 of about 1,167 (156)
Control of Drilling Vibrations: A Time-Delay System-Based Approach [PDF]
, 2013 International audienceThe main purpose of this study is the control of both axial and torsional vibrations occurring along a rotary oilwell drilling system.
Boussaada, Islam +3 more
core +3 more sources
A parametric study for the design of an optimized ultrasonic-percussive planetary drill tool [PDF]
, 2016 Traditional rotary drilling for planetary rock sampling, in situ analysis, and sample return are challenging because the axial force and holding torque requirements are not necessarily compatible with lightweight spacecraft architectures in low-gravity ...
Harkness, Patrick +4 more
core +1 more source
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
doaj +1 more source
Full and half-wavelength ultrasonic percussive drills [PDF]
, 2018 Ultrasonic-percussive drills are a leading technology for small rock drilling applications where power and weight-on-bit are at a premium. The concept uses ultrasonic vibrations to excite an oscillatory motion in a free-mass, which then delivers ...
Harkness, Patrick +2 more
core +1 more source
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
doaj +1 more source
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
doaj +1 more source
Nonlinear Dynamic Characteristic Analysis of a Landing String in Deepwater Riserless Drilling
Shock and Vibration, Volume 2018, Issue 1, 2018., 2018 The landing string is an important component of deepwater riserless drilling systems. Determination of the dynamic characteristics of the landing string plays an essential role in its design for ensuring its safe operation. In this paper, a dynamic model is developed to investigate the dynamic response characteristics of a landing string, where a ...
Jun Liu +5 more
wiley +1 more source
Effect of particle shape and fragmentation on the response of particle dampers [PDF]
, 2013 A particle damper (PD) is a device that can attenuate mechanical vibrations thanks to the dissipative collisions between grains contained in a cavity attached to the vibrating structure.
Carlevaro, Carlos Manuel +2 more
core +1 more source
A multibody dynamic model of the drilling system with drilling fluid
Advances in Mechanical Engineering, 2016 This article is intended to present a multibody dynamic model of the drilling system, consisting of drillstring and drilling fluid. The drillstring is a complex rigid–flexible coupling system, including rigid bodies, Euler–Bernoulli beam elements ...
Yanhui Ma +4 more
doaj +1 more source
The vibration modal characteristics of drillstring in compound drilling
Journal of Physics: Conference Series, 2022 Abstract The compound drilling plays an important role in improving borehole quality. The modal analysis model of drillstring is established to analyze the modal of longitudinal vibration, lateral vibration and torsional vibration, respectively. Compared with longitudinal and torsional vibrations, the intrinsic frequency range of lateral
Heyi Yuan +4 more
openaire +1 more source