Results 81 to 90 of about 921,124 (210)

Degradable cellulose acetate-based waterborne polyurethane sand-fixing agents for sand control in desert regions

open access: yesPolymer Testing
In hot and arid desert regions, degradable chemical sand-fixing agents are efficient in dealing with problems caused by wind-blown sand movement without damaging the environment.
Wanjia Yang, Benli Liu
doaj   +1 more source

Flow Performance Test and Evaluation Method for ZZS Sand Control Screen

open access: yesShiyou jixie, 2021
Conventional sand control methods are easy to encounter sand plug by reservoir sand under complex production conditions, thereby significantly reducing its flow performance. For this reason, a fold-type(ZZS)sand control screen is developed.
Chen Yang   +5 more
doaj  

Compressive strength of concrete using glass powder as a filler replacement [PDF]

open access: yes, 2012
A lot of researches have been done to improve the quality of concrete that can be used in long term period and design a more economic concrete for the construction. Using waste glass as a construction material is a good way to help the environment.
Nur Shahira Diana , Salehuddin
core  

Luminescence dating of wind-blown sands from the Broo Peninsula, Shetland [PDF]

open access: yes, 2012
This report provides a temporal framework to support University of Stirling geo-archaeological investigations near Huesbreck, Broo Pennisula (Shetland), examining how the early modern population there, adapted to harsh climate conditions in the 18-19th ...
Kinnaird, T.C.   +2 more
core  

Spatiotemporal dynamics and influencing factors of soil quality in aeolian desertified lands of the Qinghai-Tibet Plateau

open access: yesEcological Indicators
Aeolian desertified land (ADL) is widespread across the Qinghai-Tibet Plateau (QTP), posing a significant threat to regional ecological stability. Accurately assessing the spatiotemporal dynamics of soil quality and influencing factors is crucial for ...
Mengzhen Huang   +5 more
doaj   +1 more source

Drag-type Multistage Fracturing Sand Control String

open access: yesShiyou jixie, 2017
The thin layer heavy oil reservoirs in Shengli Oilfield have the features of great interlayer differences, long reservoir section and multiple layers, which result in uneven treatment of thin layers using conventional fracturing and sand control ...
Zhou Sihong
doaj  

Visual art inspired by the collective feeding behavior of sand-bubbler crabs

open access: yes, 2018
Sand--bubblers are crabs of the genera Dotilla and Scopimera which are known to produce remarkable patterns and structures at tropical beaches. From these pattern-making abilities, we may draw inspiration for digital visual art.
A Burton   +22 more
core   +1 more source

Sand Production Mechanism of Loose Sandstone Reservoir in Deepwater Gas Field

open access: yesShiyou jixie, 2023
In the process of deepwater oil and gas exploitation, sand production from reservoir has become a key problem affecting the normal production of wells, and especially in the high-yield gas wells of deepwater gas field, the excessive high production rate ...
Deng Fucheng   +5 more
doaj  

A Small Displacement Annular-plunger Rod Pump

open access: yesShiyou jixie, 2016
To address the issues of the conventional pump for deep pumping wells of low permeability reservoir like imbalanced supply and production, low pump efficiency, high pump leakage, a small displacement annular-plunger rod pump has been developed.The pump ...
Qu Wentao   +4 more
doaj  

Applicability Analysis and Effect Evaluation of Artificial Borehole Wall Sand Control in Bohai Oilfield

open access: yesShiyou jixie, 2021
The artificial borehole wall sand control technology does not require to look for puncturing and leaking points and does not affect the sand control drift diameter of the original well, it is increasingly used in the treatment of sandy wells resulted ...
Yuan Weiwei   +4 more
doaj  

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