Results 71 to 80 of about 536,917 (308)

The Development of Multifunction Wellbore Cleaning Tool

Shiyou jixie, 2016
The wellbore cleaning tool of foreign service company features single function, no specific collection schemes for different debris and poor fishing performance.
Yu Pengwei, Zuo Qichuan, Zhu He, Wang Degui, Xu Chunyuan, Ma Dong   +5 more
doaj  

Analytical and experimental study of a reverse circulation drill bit with an annular slit

Advances in Mechanical Engineering, 2016
A new type of drill bit designed with an annular slit was developed to enhance the reverse circulation effect of the down-the-hole hammer drilling technology. A computational fluid dynamics code, Fluent, was used to simulate the flow phenomena inside the
Pinlu Cao, Yunwang Chen, Miaomiao Liu, Baoyi Chen, Jinsong Wang   +4 more
doaj   +1 more source

Unusual circulation patterns of the Rias Baixas induced by Minho freshwater intrusion (NW of the Iberian Peninsula). [PDF]

PLoS ONE, 2014
The Minho River, situated 30 km south of the Rias Baixas, is the most important freshwater source flowing into the Western Galician coast (NW of the Iberian Peninsula).
Magda Catarina Sousa, Renato Mendes, Ines Alvarez, Nuno Vaz, Moncho Gomez-Gesteira, João Miguel Dias   +5 more
doaj   +1 more source

Keratin 19 as a prognostic marker and contributing factor of metastasis and chemoresistance in high‐grade serous ovarian cancer

Molecular Oncology, EarlyView.
Keratin 19 (KRT19) is overexpressed in high‐grade serous ovarian cancer with high levels of Kallikrein‐related peptidases (KLK) 4–7 and is associated with poor survival. In vivo analyses demonstrate that elevated KRT19 increases peritoneal tumour burden.
Sophia Bielesch, Isabel Vogel, Sina Nokodian, Johanna Moeller, Antonia Blechschmidt, Vicky Hecht, Vanessa Kuentzel, Katharina Thiedig, Melissa Schwab, Oliver Schilling, Holger Bronger, Marion Kiechle, Viktor Magdolen, Tobias Dreyer   +13 more
wiley   +1 more source

Simulation and Experimental Study on Cuttings-Carrying for Reverse Circulation Horizontal Directional Drilling with Dual Drill Pipes

Advances in Civil Engineering, 2019
In the past decades, horizontal directional drilling (HDD) has been successfully used to install various pipelines in different strata. However, construction accidents such as drill-burying and drill-sticking occur occasionally when pipelines installed ...
Lingrong Kong, Yu Wang, Bohong Wu, Zhiqiao Wang   +3 more
doaj   +1 more source

Study on Change Rules of Factors Affecting Gas Loss during Coalbed Air Reverse Circulation Sampling

Advances in Civil Engineering, 2021
The gas loss in sampling is the root of coalbed gas content measurement error. The pressure and particle size have a significant impact on the gas loss.
Demin Chen, Wei Long, Yanyan Li, Rui Zhang   +3 more
doaj   +1 more source

CaMKII-dependent regulation of cardiac Na(+) homeostasis. [PDF]

, 2014
Na(+) homeostasis is a key regulator of cardiac excitation and contraction. The cardiac voltage-gated Na(+) channel, NaV1.5, critically controls cell excitability, and altered channel gating has been implicated in both inherited and acquired arrhythmias.
Grandi, Eleonora, Herren, Anthony W
core   +2 more sources

Deciphering transcriptional plasticity in pancreatic ductal adenocarcinoma reveals alterations in sensory neuron innervation

Molecular Oncology, EarlyView.
Pancreatic sensory neurons innervating healthy and PDAC tissue were retrogradely labeled and profiled by single‐cell RNA sequencing. Tumor‐associated innervation showed a dominant neurofilament‐positive subtype, altered mitochondrial gene signatures, and reduced non‐peptidergic neurons.
Elena Genova, Michele Montrone, Uday Rangaswamy, Francesco Diversi, Irene Schiavo, Denise Ferrarini, Roberta Di Florio, Irene Longo, Michele Coscia, Nicola Zamboni, Giorgia Demontis, Lisa Veghini, Vincenzo Corbo, Remo Sanges, Paul Heppenstall   +14 more
wiley   +1 more source

The effect of a meridional flow on Parker's interface dynamo

, 2004
Parker's interface dynamo is generalized to the case when a homogeneous flow is present in the high-diffusivity (upper) layer in the lateral direction (i.e. perpendicular to the shear flow in the lower layer).
A. Kerekes, Basu, Charbonneau, Choudhuri, Dikpati, Dikpati, Hathaway, K. Petrovay, Kosovichev, Makarov, Markiel, Mason, Moss, Parker, Petrovay, Petrovay, Phillips, Tobias, Wang, Weiss   +19 more
core   +2 more sources

Eddy-Mediated Regime Transitions in the Seasonal Cycle of a Hadley Circulation and Implications for Monsoon Dynamics [PDF]

, 2008
In a simulation of seasonal cycles with an idealized general circulation model without a hydrologic cycle and with zonally symmetric boundary conditions, the Hadley cells undergo transitions between two regimes distinguishable according to whether large ...
Bordoni, Simona, Schneider, Tapio
core   +1 more source