Results 11 to 20 of about 1,237,027 (216)

Effect of geometric shape of piston on power loss of sliding part between piston and cylinder in swash plate type piston pump and motor

open access: yesNihon Kikai Gakkai ronbunshu, 2018
The power loss due to the friction and the leakage in the sliding part between piston and cylinder of a swash plate type piston pump and motor affects the equipment performance and the efficiency.
Kazuhiko TANAKA   +3 more
doaj   +1 more source

Optimization of gathering pipeline network topology in rolling development of old oilfields

open access: yesYou-qi chuyun, 2020
The layout optimization model for rolling development of gathering pipeline network was built against the problem of network topology changes caused by the increasing wellheads in old blocks and the new wells addition in new blocks in the late ...
Jianfei SUN, Jia LUO, Yongtu LIANG
doaj   +1 more source

Friction characteristics on sliding part between piston and cylinder of swash plate type piston pump (Effect of geometric shape of piston)

open access: yesNihon Kikai Gakkai ronbunshu, 2017
The friction characteristics on sliding part between piston and cylinder in a swash plate type piston pump in which improvement of the power density is demanded affect the equipment performance and the efficiency.
Kazuhiko TANAKA, Yusuke FUJITA
doaj   +1 more source

Two-phase Simulation of Well Control Methods for Gas Kicks in Case of Water and Oil-based Muds [PDF]

open access: yesJournal of Petroleum Science and Technology, 2018
Kick occurrence is a possible event during a drilling process. It is required to be handled immediately using a well control method to avoid blowout, financial losses and damages to the drilling crew.
Yaser Jahanpeyma, Saeid Jamshidi
doaj   +1 more source

Numerical study of changes in coal permeability in a mining workface [PDF]

open access: yesActa Montanistica Slovaca, 2015
At the front of a working coalface, the stress state can differ significantly across different zones. This seriously affects the permeability of the coal seam.
Xiang-chao Shi   +6 more
doaj   +1 more source

Experimental Investigation of the Effects of Porosity, Hydraulic Conductivity, Strength, and Flow Rate on Fluid Flow in Weakly Cemented Bio-Treated Sands

open access: yesHydrology, 2022
Fluid injection in a porous medium is the underlying mechanism for many applications in the fields of groundwater hydraulics, hydrology and hydrogeology, and geo-environmental engineering and in the oil and gas industry.
Charalampos Konstantinou   +1 more
doaj   +1 more source

Calming height requirements for oil shale particles

open access: yes, 2022
Technical memorandum no. 67-34.The primary object of the Anvil Points Oil Shale Research Center Technical memorandum is to advise authorized personnel employed by the Participating Parties (1) that various activities are in progress or that certain ...

core  

Frictional Pressure Drop for Gas–Liquid Two-Phase Flow in Coiled Tubing

open access: yesEnergies, 2022
Coiled tubing (CT) is widely used in drilling, workover, completion, fracturing and stimulation in the field of oil and gas exploration and development. During CT operation, the tubing will present a gas–liquid two-phase flow state.
Shihui Sun   +3 more
doaj   +1 more source

Basic flow characteristics of raw and spent oil shale

open access: yes, 2022
Technical memorandum no. 65-4.Includes charts, technical drawings.These technical memoranda pertain to work performed at Anvil Points.The United States Bureau of Mines facility at Anvil Points, near Rifle, Colorado, was reactivated starting in May 1964 ...

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Dynamic Simulation and Test Verification of Hydraulic Automatic Tensioner for an Engine Timing Chain Drive System

open access: yesChinese Journal of Mechanical Engineering, 2023
As a fundamental component of an automobile engine's timing chain drive system, the hydraulic automatic tensioner significantly enhances fuel economy while minimizing system vibrations and noise.
Zengming Feng, Jinxing Yang, Fei Wang
doaj   +1 more source

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