Results 191 to 200 of about 4,548 (235)
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Torque and Drag in Directional Wells-Prediction and Measurement
Journal of Petroleum Technology, 1984Summary 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 +2 more
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Designing Well Paths to Reduce Drag and Torque
SPE Drilling Engineering, 1987Summary 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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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 +4 more
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<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 +4 more
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Torque and Drag Modeling for Horizontal Openhole Completions
Journal of Petroleum Technology, 2006This 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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Particulate Science and Technology, 2012
The mutual influence of translational and rotational spherical particle movements in calm water was studied using experimental data and numerical simulation. Spherical balls with a density close to that of water were speeded up in special devices, which ensured the required ball rotational and translational velocity in the given plane.
Lukerchenko, N. (Nikolay) +4 more
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The mutual influence of translational and rotational spherical particle movements in calm water was studied using experimental data and numerical simulation. Spherical balls with a density close to that of water were speeded up in special devices, which ensured the required ball rotational and translational velocity in the given plane.
Lukerchenko, N. (Nikolay) +4 more
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Oscillatory Drag, Lift, and Torque on a Circular Cylinder in a Uniform Flow
The Physics of Fluids, 1972Numerical 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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An Innovative Workflow for Real-Time Torque and Drag Monitoring
SPE/IADC International Drilling Conference and Exhibition, 2023Abstract Abnormal torque and drag (T & D), which commonly includes overpull, underpull, and high-torque load, are indications of excess frictional effects between the drillstring and the wellbore walls. Numerous conditions can cause these effects, including tight hole, differential sticking, poor hole cleaning, key seats, etc ...
Kewen Sun +3 more
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Effect of Steerable BHA on Drag and Torque In Wells
European Petroleum Conference, 1990Abstract Steerable bottom hole assemblies are often used when drilling deviated wells. Planning of such deviated wells often include studies of torque and drag calculations for the planned well-path and BHA's in order to have a fairly good idea of friction and torque to be encountered when drilling.
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Calculation of Drag Torque Losses by Component of a Transfer Case
SAE Technical Paper Series, 2019<div class="section abstract"><div class="htmlview paragraph">In recent decades, fuel economy has become a key indicator of an automaker corporate social responsibility and a market differentiation factor, and ultimately it is regulated by government agencies such as EPA through CO<sub>2</sub> emissions compliance tests.
Ricardo Rivera Rodriguez +1 more
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Quantifying Tortuosities by Friction Factors in Torque and Drag Model
SPE Annual Technical Conference and Exhibition, 2002Abstract Tortuosity occurs when a well deviates from a straight hole. The most commonly known tortuosity is the local dogleg severity variation associated with the use of steerable motors in "slide/drill/slide" drilling. However, there is a tortuosity that exists in many wells, which the authors will refer to as "micro-tortuosity" in ...
Tom Gaynor +3 more
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