Results 101 to 110 of about 425 (156)

Multifunctional Downhole Drilling Motor Speed Sensor Based on Triboelectric Nanogenerator. [PDF]

Micromachines (Basel)
Zhang Y, Su S, Zhang L, Gao Y, Wu C.
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

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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

The Study on Vibration of Drill String of ERW

2008 International Conference on Computer Science and Software Engineering, 2008
During exploitation of extended reach well (ERW) drilling engineer, the problem of drill string failure is very serious; drill string vibrations are main reasons. In this paper drill string of extended reach well of different part is object being studied. The models about various vibrations are set up. Modal vibrations of drill string are studied.
Han Chunjie, Yan Tie
openaire   +1 more source

Drilling String Vibration: Modelling and Simulation

Volume 11A: Honoring Symposium for Professor Carlos Guedes Soares on Marine Technology and Ocean Engineering, 2018
The offshore industry has a significant impact on the global economy and it is expected to grow over the next 4 years. A crucial part of an offshore structure is the drill string. Drill strings can be seriously damaged by vibration during drilling operations. The control of vibrations in drill strings is essential.
Amat, Sergio, Henríquez Velez, Gustavo E, Légaz, María José   +2 more
openaire   +2 more sources

Nonlinear Stochastic Drill-String Vibrations

Journal of Vibration and Acoustics, 2002
Lateral vibrations of drill-strings used in oil well operations are considered. A finite elements based discretization procedure leads to a nonlinear dynamic system which is used to represent the drill-string inertia and stiffness characteristics, as well as the elasticity of the wall of the well.
P. D. Spanos, A. M. Chevallier, N. P. Politis   +2 more
openaire   +1 more source

Stick-Slip Vibration of Drill Strings

Journal of Engineering for Industry, 1991
The stick-slip vibration is introduced as a new mechanism to explain the large amplitude torsional oscillation of the drill strings in oil and gas well drillings. A record of field data is identified and simulated according to the new mechanism. The analytical results derived from the numerical simulation agree with the field data with 95.6 percent ...
Yu-Hwa Wang, Yao-Qun Lin
openaire   +1 more source

An Experimental Study of Drill-String Vibration

Journal of Engineering for Industry, 1960
This paper describes equipment which has been developed for the measurement of axial force, torque, and axial and rotational motions at the top of a drill string. Measurements made in two wells with this equipment represent the first time these quantities have been recorded during drilling.
I. Finnie, J. J. Bailey
openaire   +1 more source