Results 231 to 240 of about 8,055 (288)

Torque and drag field applications in horizontal wells

International Journal of Oil, Gas and Coal Technology, 2017
The industry of drilling for oil, gas geothermal, and storage purposes necessitates construction of challenging wells in recent applications. Challenging wells are required to be designed prior to the drilling to selection of the equipment to be utilised
Tuna Eren, Burak Kagan Caglayan, Mustafa Verşan Kök   +2 more
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Torque and Drag Calculations in Multilateral Wells

SPE Nigeria Annual International Conference and Exhibition, 2022
Abstract Multilateral drilling technology has advanced to the point that it is now feasible to explore and extract resources from previously unprofitable reservoirs. It may also help to enhance field development management by allowing for more efficient fluid flow from the formation.
Darlington Etaje, Roman Shor, Reza Lashkari   +2 more
openaire   +1 more source

Numerical and experimental investigation of drag torque in a two-speed dual clutch transmission

Mechanism and Machine Theory, 2014
The theoretical analysis of drag torques within a two-speed dual clutch transmission is presented in this article. The numerical models are developed to study the different sources of drag torques in dual clutch transmission. Simulations are performed in
Nong Zhang, Paul Walker, Jiageng Ruan
exaly   +2 more sources

Simulations of drag torque affecting synchronisers in a dual clutch transmission

Japan Journal of Industrial and Applied Mathematics, 2011
Drag torque contributes significantly to the engagement of synchronisers in vehicle transmissions. Little is understood of how drag torque varies during transient engagement.
Nong Zhang, Paul Walker
exaly   +2 more sources

Dynamic Torque and Drag Model

SPE Annual Technical Conference and Exhibition, 2020
Abstract It is generally acceptable to use soft string model for simple wells and stiff string for high dogleg wells. But these models fail to reveal the complex mechanical behaviors of tubular string in tripping in, tripping out, and sliding drilling operations with time as some segments of tubular string may move upward and downward ...
Robello Samuel, Wenjun Huang
openaire   +1 more source

Drillstring Analysis With a Discrete Torque/Drag Model

SPE Drilling & Completion, 2013
Summary The only standard drillstring model in use today is the torque/drag model because of its simplicity and general availability. Field experience indicates that this model generally gives good results but sometimes performs poorly.
Robert F. Mitchell, Arve Bjørset, Gaute Grindhaug   +2 more
openaire   +2 more sources

How Good is the Torque-Drag Model?

Proceedings of SPE/IADC Drilling Conference, 2007
Abstract Perhaps the only "standard" drillstring model in use today is the torque-drag model originally developed by Johancsik (1973) in 1984, and put in a standard form by Sheppard (1987). Because of the simplicity and general availability of this model, it has been used extensively for planning and in the field.
Robert F. Mitchell, Robello Samuel
openaire   +1 more source

Advanced Torque and Drag Considerations in Extended-Reach Wells

IADC/SPE Drilling Conference, 1996
Abstract Excessive torque and drag can be critical limitations in Extended-Reach Drilling (ERD). This paper details issues related to torque and drag prediction, monitoring, and management in ERD wells. Results are presented from sensitivity analyses of extreme ERD trajectories such as 7 to 8 km departures at 1600 m TVD.
M. L. Payne, Fereidoun Abbassian
openaire   +2 more sources

Dynamic Model for Stiff-String Torque and Drag

SPE Drilling & Completion, 2013
SummaryA dynamic stiff-string torque-and-drag (T&D) model is presented that assumes steady-state motion of the drillstring as its basis for calculations. Results are compared with previously published T&D models that are based on static equilibrium.
Vadim Tikhonov, Khaydar Valiullin, Albert Nurgaleev, Lev Ring, Raju Gandikota, Pavel Chaguine, Curtis Cheatham   +6 more
openaire   +1 more source

Experimental Investigation on Unstable Vibration Characteristics of Plates and Drag Torque in Open Multiplate Wet Clutch at High Circumferential Speed

Journal of Fluids Engineering, Transactions of the ASME, 2017
The drag torque caused by the viscous shear in open multiplate wet clutches has been studied in most available literature whose focus is placed on low circumferential speed. However, the drag torque increases drastically in the high circumferential speed
Shiyang Hou, Jibin Hu
exaly   +2 more sources