Results 81 to 90 of about 56,758 (188)

Real Time Torque and Drag Analysis during Directional Drilling

, 2013
The oil industry is generally producing oil and gas using the most cost-effective solutions. Directional drilling technology plays an important role especially because the horizontal wells have increased oil production more than twofold during recent years.
openaire   +2 more sources

Anti-backlash circuit for hydraulic drive system Patent [PDF]

, 1966
Antibacklash circuit for hydraulic drive ...
Acord, J. D.
core   +1 more source

CSO Intelligent Optimization of Drag Torque Parameters of Wet Brakes Based on the SSA-BP Approximate Model

Jixie chuandong
To solve the engineering problem of power loss in wet brakes under non-braking conditions, taking into consideration the influence of the lubricating oil in the clearance of friction pairs on the drag torque of the friction pair, making use of the strong
Li Jie, Wang Shuai, Lan Hai, Wang Zhiyong   +3 more
doaj  

Sensitivity Analysis of Gear Rattle Parametric of Transmission

Jixie chuandong, 2018
Taking a manual transmission as research object,a simulation analysis model of transmission gear rattle is conducted by using the SIMdrive software,this model considering the influencing factors such as input shaft speed fluctuation,clearance,inertia of ...
Shi Xiaohui, Xiong Xiuwen, Guo Dong, Zheng Guangze, Liu Peihai, Zhang Hailin   +5 more
doaj  

Control of VTOL Vehicles with Thrust-direction Tilting

, 2013
An approach to the control of a VTOL vehicle equipped with complementary thrust-direction tilting capabilities that nominally yield full actuation of the vehicle's position and attitude is developed.
Hamel, Tarek, Hua, Minh-Duc, Samson, Claude   +2 more
core   +1 more source

REDUCING TORQUE AND DRAG IN EXTENDED REACH WELLS

Drilling an extended reach well acquires precise engineering in drilling the deviated and horizontal section of the well as there are a lot of technical problems that can appear in these sections. The biggest issues that appear in the deviated and horizontal sections of the well are high values of friction factor that leads to high values of torque and
Gaurina-Međimurec, Nediljka, Pašić, Borivoje, Mijić, Petar, Medved, Igor, El Sabeh, Karim   +4 more
openaire   +1 more source

Piston Retraction-Induced Braking Drag Mechanism of Commercial Vehicle Disc Brake Under Dynamic Working Conditions

Vehicles
Braking drag is a typical fault of brake systems, and clarifying the correlation mechanism between vehicular working conditions and braking drag is critical for brake design improvement.
Jinzhi Feng, Guangqi Chen, Decheng Wei, Chunhui Gong, Zujian Wang, Xu Long, Dongdong Zhang   +6 more
doaj   +1 more source

Measurement and analysis of moment of inertia using torsional pendulum method with air damping consideration

Jixie qiangdu
ObjectiveTo address the issue of accuracy degradation caused by aerodynamic damping when measuring the moment of inertia of irregular specimens with large airfoil surfaces using the torsional pendulum method, a compensation approach based on drag ...
MA Weiping, ZHAO He, SONG Yuzhou, LI Tenglong   +3 more
doaj   +2 more sources

Enhancing start-up and torque in Darrieus VAWTs through a novel plain gurney flap design. [PDF]

Sci Rep
Eltayeb W, Somlal J, SirElkhatim M, Yedukondalu G, Srinath A.   +4 more
europepmc   +1 more source

An optically driven microstructure for torque measurement in rotary molecular motors. [PDF]

Microsyst Nanoeng
Donini G, Bianchi S, Pellicciotta N, Frangipane G, Cannarsa MC, Bagal OS, Di Leonardo R.   +6 more
europepmc   +1 more source