Results 121 to 130 of about 891,157 (304)
The Position Analysis of Drilling Fluid Retention in Horizontal Well [PDF]
, 2011 The driving force caused by density difference of slurry and drilling fluid is a function of circumference angle and radius in horizontal well displacing.
Jun He +3 more
core +1 more source
Study and Field Trials on Dissolvable Frac Plugs for Slightly Deformed Casing Horizontal Well Volume Fracturing. [PDF]
ACS Omega, 2022 Zhang P, Pu C, Pu J, Wang Z.
europepmc +1 more source
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective High‐resolution MRI enables detailed assessment of intracranial vessel wall pathology in moyamoya vasculopathy. We aimed to classify adult moyamoya vasculopathy etiologies using high‐resolution MRI and to examine subtype‐specific associations between high‐resolution MRI features and ischemic infarction.
Guangsong Han +8 more
wiley +1 more source
In Situ Stress Distribution and Variation Monitored by Microseismic Tracking on a Fractured Horizontal Well: A Case Study from the Qinshui Basin. [PDF]
ACS Omega, 2022 Tian L, Li Z, Cao Y, Liu S, Song Y.
europepmc +1 more source
Predictive Ability of Plasma p‐tau217 for β‐Amyloid Status: A Prospective Multicenter Study
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective Plasma tau phosphorylated at threonine 217 (p‐tau217) measured with fully automated platforms has shown high accuracy for Alzheimer's disease (AD) diagnosis, but real‐world multicenter data remain limited. We aimed to validate the diagnostic performance of p‐tau217 for identifying AD pathology in a real‐world multicenter cohort ...
Miquel Massons +33 more
wiley +1 more source
Horizontal inequalities, political environment, and civil conflict : evidence from 55 developing countries, 1986-2003 [PDF]
Several studies of civil war have concluded that economic inequality between individuals does not increase the risk of internal armed conflict. This is perhaps not so surprising.
Ostby, Gudrun
core
Supporting Technology of Shale Gas Horizontal Well Cementing Tool
Shiyou jixie, 2016 To meet the special requirement of shale gas horizontal well cementing,and to address the issues like difficult casing running in shale gas horizontal well,poor casing centralization in horizontal section,and casing float collar and float shoe close ...
Zhou Zhanyun +5 more
doaj
Effect of Sulfur Deposition on the Horizontal Well Inflow Profile in the Heterogeneous Sulfur Gas Reservoir. [PDF]
ACS Omega, 2021 Shao M +5 more
europepmc +1 more source
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Background and Purpose White matter hyperintensities (WMH) are a core neuroimaging marker of cerebral small vessel disease (CSVD). Sleep apnoea (SA) is a recognized vascular risk factor, but its associations with regional WMH burden, short‐interval WMH change and cognitive performance in population‐based cohorts remain incompletely defined. We
Peng Cheng +4 more
wiley +1 more source
Open Journal of Natural Science, 2016 由于水平井钻井技术的飞速发展，水平井–直井联合开发技术已经逐渐成熟，然而在设计油田开发方案和油藏工程计算时，对于压裂水平井–直井联合开发井网压裂水平井参数的优化还比较少。本文依据大庆某外围低渗透薄层水平井–直井联合开发油田的地质特征和开发特征，应用油藏数值模拟Eclipse软件并采用LGR局部加密网格技术建立了具有代表性的机理模型，从而对水平井–直井联合开发井网压裂水平井的参数进行优化，研究结果为类似水平井–直井联合开发油田压裂水平井参数优选提供了指导。 Due to the rapid development of horizontal well drilling technology, Horizontal well-Vertical well joint development ...
openaire +1 more source