Results 11 to 20 of about 172,627 (250)

Transport of polymer particles in a oil-water flow in porous media: enhancing oil recovery [PDF]

, 2018
We study a heuristic, core-scale model for the transport of polymer particles in a two phase (oil and water) porous medium. We are motivated by recent experimental observations which report increased oil recovery when polymers are injected after the ...
Keilegavlen, Eirik, Kokubun, Max A. Endo, Kumar, Kundan, Radu, Florin A., Spildo, Kristine   +4 more
core   +2 more sources

The effects of oil contamination on the stability and flow behavior of drilling foams under high-pressure conditions

Results in Engineering, 2023
Foams used in drilling can be contaminated by formation influx containing oil. The stability and flow behavior of foam are affected when it comes into contact with oil.
Oyindamola Obisesan, Ramadan Ahmed, Mahmood Amani   +2 more
doaj   +1 more source

An External Gear Pump with Axial Stepped-gear Structure and Without Additional Trapped-oil Relief-grooves

Jixie chuandong, 2023
In order to solve the problems in the existing gear pump with another trapped oil buffer groove, an external gear pump with axial stepped-gear structure for realizing two different contact ratios is proposed; the trapped-oil load flow from the gear ...
Wang Hao, Song Anran, Li Yulong
doaj  

Quartz-amethyst hosted hydrocarbon-bearing fluid inclusions from the green ridge breccia in the snoqualmie granite, North Cascades,WA, USA [PDF]

, 2017
We wish to acknowledge the constructive criticisms made by the three anonymous reviewers.Their suggestions and comments greatly improved the first version of the manuscript.Peer reviewedPublisher ...
Baba, Mas’Ud, Bowden, Stephen, Costanzo, Alessandra, Feely, Martin, George, Joe, Lindner, Franzisca, Owens, Peter, Parnell, John   +7 more
core   +2 more sources

A Comprehensive Compensation Method for High-speed Gear Pumps Without the Cavitation Phenomenon

Jixie chuandong, 2023
In order to improve the cavitation performance under high-speed for external gear pumps, a comprehensive compensation method with the small backlash, innovative annulus relief-groove and increasing inlet oil-pressure is proposed.
Li Yulong, Hou Xinyu, Zhang Lihua
doaj  

Fluid evolution and paleo-pressure recovery by Raman quantitative analysis in the Shahejie Formation of the western slope belt in Dongpu Sag, Bohai Bay Basin, China

Frontiers in Earth Science, 2023
Inorganic and organic fluids are widely found in sedimentary basins during oil and gas migration and accumulation. This research investigates two types of sandstone reservoirs with different pressure states and fluid evolution of the Shahejie Formation ...
Youjun Tang, Youjun Tang, Yijun Wu, Ruyue Wang, Yahao Huang, Yahao Huang, Yifan Xue, Zhonghong Chen, Tianwu Xu, Ting Wang, Hongbo Li   +10 more
doaj   +1 more source

Prediction Model of Annular Trapped Pressure in the Whole Life Cycle of Deepwater Oil and Gas Wells

Shiyou jixie, 2022
Accurate prediction of annular trapped pressure is great significance for maintaining wellbore integrity and prolonging life cycle of oil and gas wells.
Zhang Geng, Li Jun, Liu Gonghui, Yang Hongwei, Wang Jiangshuai, Wang Chao   +5 more
doaj  

Influence and Analysis of Trapped-oil on Output Characteristic of Gear Motor

Jixie chuandong, 2022
To clarify characteristics of trapped-oil of gear motor and its influence on output torque and output speed， in terms of meshing and oil trapping process of motor gear pair， the medium pressure distribution on the tooth flanks and the solution model of ...
Shengjie Yan, Ruyi Wang
doaj  

Dynamic Pressure Simulation of an External Gear Pump With Relief Chamber Using a Morphological Approach

IEEE Access, 2018
During the working cycle of an external gear pump, hydraulic oil trapped between the pair of meshing gear and pinon teeth may exert high-pressure pulses due to periodic volumetric compression and expansion of the trapped volume. The pressure pulses cause
Hao Tian
doaj   +1 more source

Operation and performance of screw machines with high built-in volume ratio [PDF]

, 2019
A performance calculation of a screw compressor with increased built-in volume ratio was performed in this paper to establish how increased built-in volume ratio influences its efficiency.
Stosic, N.
core   +1 more source