Results 21 to 30 of about 2,972,520 (248)
BMC Cardiovascular Disorders, 2021 Background To evaluate the prognosis of acute cerebral infarction at 1-year follow-up in different circulation infarctions. Methods Clinical data of 858 consecutive patients with acute cerebral infarction were collected. Of the 858 cases, 21 (2.45%) were
Li-Li Chen +6 more
doaj +1 more source
Materials for Controlling Severe Lost Circulation - Laboratory Evaluation
, 2017 Lost circulation is still today one of the most costly problems for oil and gas operators. It may occur into permeable formations, depleted zones, induced or nature fractures and cavernous formations while drilling, cementing or during workover jobs in ...
C. R. Miranda +6 more
core +1 more source
Journal of Petroleum Exploration and Production Technology, 2019 Presence of natural fractures in sub-surface makes an oil well drilling operation very challenging. As one of the major functions of drilling mud is to maintain bottomhole pressure inside a wellbore to avoid any invasion of unwanted high-pressure influx (
Faysal Ahammad +2 more
doaj +1 more source
One Sack Rapid Mix and Pump Solution to Severe Lost Circulation
, 2011 Lost circulation events continue to plague drilling operations. Severe lost circulation can result in complete loss of the hole along with drilling equipment.
Dennis K. Clapper +6 more
core +1 more source
Applied SciencesTo address the challenges associated with severe lost-circulation formations, including large loss-channel dimensions, rapid fluid losses, and the tendency of conventional bridging or physical-filling materials to accumulate at fracture entrances rather ...
Hongjun Wu +6 more
doaj +1 more source
Lagrangian modelling of a person lost at sea during the Adriatic scirocco storm of 29 October 2018 [PDF]
Natural Hazards and Earth System Sciences, 2020 On 29 October 2018 a windsurfer's mast broke about 1 km offshore from Istria during a severe scirocco storm in the northern Adriatic Sea. He drifted in severe marine conditions until he eventually beached alive and well in Sistiana (Italy) 24 ...
M. Ličer +4 more
doaj +1 more source
Rheology of a New Gel Used for Severe Lost Circulation Control
, 2010 Lost circulation is a common problem in drilling project, especially the severe loss which consumes much material and costs much time, sometimes induced wellbore collapse, drill pipe sticking, overflow, blowout and well abandon at last.
Xunyong Nie +4 more
core +1 more source
Microbiome‐blood–brain barrier interactions in aging — mechanisms and therapeutic potential
FEBS Letters, EarlyView.Aging reshapes the gut microbiome (↓SCFA‐producing commensals; ↑pro‐inflammatory outputs), shifting circulating metabolites (↓SCFAs; ↑LPS, ↑TMAO, ↑PAA) that act at the BBB to increase nonspecific transcytosis, alter transport, and promote astrocyte reactivity, heightening brain vulnerability.
Daniel Cuervo‐Zanatta +3 more
wiley +1 more source
Zuanjingye yu wanjingyeHigh filtration rate lost circulation materials have several shortcomings such as inability to use at elevated temperatures, inability to mix with oil-based drilling fluids and low acid solubility etc.
Yutong LIU +3 more
doaj +1 more source
Tumour–host interactions in Drosophila: mechanisms in the tumour micro‐ and macroenvironment
Molecular Oncology, EarlyView.This review examines how tumour–host crosstalk takes place at multiple levels of biological organisation, from local cell competition and immune crosstalk to organism‐wide metabolic and physiological collapse. Here, we integrate findings from Drosophila melanogaster studies that reveal conserved mechanisms through which tumours hijack host systems to ...
José Teles‐Reis, Tor Erik Rusten
wiley +1 more source