Results 151 to 160 of about 568,250 (204)

Experimental and Theoretical Studies on Enhanced Lubricity of Hyperbranched Polyamide-Amine for Water-Based Drilling Fluids. [PDF]

Polymers (Basel)
Wang W, Lin R, Xu L, Zhang Z, Wang L, Yang S, Feng W, Xu P, Huang M.   +8 more
europepmc   +1 more source

Preparation and Performance Evaluation of a Lost-Circulation-Control Gel for Fractured Formations. [PDF]

Gels
Zheng Y, Qiu X, Yu Z, Xiao F, Deng T, Xu P, Pu L, Liu J.   +7 more
europepmc   +1 more source

The protocol for mesoscopic wide-field optical imaging in mice: from zero to hero. [PDF]

Biol Methods Protoc
Kislukhina EN, Lizunova NV, Surin AM, Bakaeva ZV.   +3 more
europepmc   +1 more source

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

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

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

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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
I Finnie
exaly   +2 more sources

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

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

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