Results 241 to 250 of about 8,057 (285)

Torque and Drag Modeling Advanced Techniques and Troubleshooting

SPE Annual Technical Conference and Exhibition, 2012
Abstract Extreme torque and drag (T&D), especially when unplanned, is a primary limiter to the reach of horizontal and extended-reach wells. Many engineers use T&D software models without a thorough understanding of how the input affects the calculations in the program.
John McCormick, Gefei Liu
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Calculation and Analysis on Drag Torque of the Wet Clutch

Applied Mechanics and Materials, 2015
In order to study the drag torque characteristics of wet clutch, the drag torque with no groove friction plates and with radial groove friction plates were analysed separately, and the influence factors of the drag torque such as the lubricating oil temperature, the depth of the groove, the average gap between the friction plates were also discussed ...
Li Ying Miao, Xiu Sheng Cheng, Xue Song Li, Li Chen Yang   +3 more
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Torque and Drag in Directional Wells-Prediction and Measurement

Journal of Petroleum Technology, 1984
Summary A computer model has been developed to predict drillstring torque and drag, and a versatile rotary torque meter has been built to use in calibrating the model. The principle of the predictive model is that torque and drag forces in a directional wellbore are primarily caused by sliding friction.
C.A. Johancsik, D.B. Friesen, Rapier Dawson   +2 more
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Designing Well Paths to Reduce Drag and Torque

SPE Drilling Engineering, 1987
Summary A deviated well with an undersection trajectory (i.e., a trajectory lying below the conventional tangent section and constantly building to target) can exhibit lower drag and torque than a conventional well geometry in certain circumstances. The influence of well geometry on drag and torque is discussed, making use of the results
M. C. Sheppard, C. Wick, T. Burgess
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Dynamic Torque and Drag Model Coupled With Transient Hydraulic

Volume 9: Offshore Geotechnics; Petroleum Technology, 2023
Abstract A drill-string is an extremely slender mechanical structure and consequently it can oscillate very easily. Drill-string vibrations during drilling operations is the source of many drilling dysfunctions such as decreased drilling performance, damage to downhole equipment, or formation instabilities.
Eric Cayeux, Espen Jettestuen, Adrian Ambrus   +2 more
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Multiphase Drag Modeling for Prediction of the Drag Torque Characteristics in Disengaged Wet Clutches

SAE International Journal of Commercial Vehicles, 2014
<div class="section abstract"><div class="htmlview paragraph">The undesired Drag Torque (DT) which is developed due to the shearing of fluid film in between the disk and separator plate reduces the efficiency of a transmission and increases the fuel consumption of a car.
Shahjada Pahlovy, Syeda Faria Mahmud, Masamitsu Kubota, Makoto Ogawa, Norio Takakura   +4 more
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Torque and Drag Modeling for Horizontal Openhole Completions

Journal of Petroleum Technology, 2006
This article, written by Technology Editor Dennis Denney, contains highlights of paper SPE 97079, "Torque and Drag Modeling for Horizontal Openhole Completions," by R. Rezvani, Halliburton/Sperry Sun, and B. Techentien, Halliburton Energy Services Inc., prepared for the 2005 SPE Annual Technical Conference and Exhibition, Dallas, 9–12 October.
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Oscillatory Drag, Lift, and Torque on a Circular Cylinder in a Uniform Flow

The Physics of Fluids, 1972
Numerical solutions of the equations governing time-dependent, viscous, incompressible fluid flow past a circle are presented for Reynolds numbers 100, 400, and 1000. These solutions show the dramatic rise of the drag coefficient during the development of the Kármán vortex street and reveal the oscillatory character of the drag, lift, and torque that ...
Jordan, Stanley K., Fromm, Jacob E.
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Drag Torque in Disk Brakes: Significance, Measurement and Challenges

SAE International Journal of Commercial Vehicles, 2015
<div class="section abstract"><div class="htmlview paragraph">Drag torque is generated in disk brakes as a result of contact (dynamic friction) between brake disk and brake pads when the braking system is not actuated. Among the negative implications of drag torque are, notably, dispensable additional fuel consumption as well as increased ...
Achim Reich, Angelo Sarda, Martin Semsch
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A Multibody Dynamic Model of Drillstring for Torque and Drag Analysis

Journal of Offshore Mechanics and Arctic Engineering, 2015
Excessive torque and drag in the wellbore can result in the buckling and the failure of the drillstring. Accurate predicting torque and drag is important in drilling operations. Due to the nature of the drilling, determination of torque and drag is a dynamic problem.
Yang Caijin, Cheng Zaibin, Jang Wei, Jiang Shiquan, Ren Gexue   +4 more
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