Results 121 to 130 of about 6,364,937 (291)
Lost circulation experimental study in oil based mud and analyzing experimental data [PDF]
, 2012 Master's thesis in Petroleum engineeringThe problem of lost circulation have for a long time occurred during the drilling operation. During the drilling through induced and natural fractures, huge drilling fluid losses lead to the higher operational ...
Gerner, Anton
core
Advanced Science, EarlyView.A low dose of dexmedetomidine, delivered by ROS‐responsive nanoparticles, preferentially accumulates in the ischemic intestine and restores gut vascular barrier integrity after ischemia/reperfusion injury. This nanoparticle‐based strategy prevents bacterial translocation and liver damage without cardiorespiratory side effects, working through HDAC ...
Hu‐Fei Zhang +10 more
wiley +1 more source
Aryl‐Tethered Pendant Sterically Shielded Imidazoliums for Durable Anion Exchange Membranes
Advanced Science, EarlyView.An aryl‐tethered, sterically shielded imidazolium architecture protects cationic sites from hydroxide attack while avoiding vulnerable benzylic cation–polymer linkages. Incorporated into poly(arylimidazolium) membranes, this dual‐protection design enhances alkaline and oxidative durability and supports prolonged alkaline water electrolysis, offering a ...
Jinggui Lei +8 more
wiley +1 more source
Designing lost circulation pills for polymer based drill-in fluids
, 2008 Specially designed non-damaging lost circulation pills (LCP) are being effectively applied for drilling depleted zones worldwide. Optimizing the LCP compositions stop the lost circulation effectively and protect the production zone from liquid and solids
ALPER KAHVECİOĞLU
core
PLXDC2 siRNA‐Mediated Intervention Attenuates Microglial Senescence Through cGAS‐STING Signaling
Advanced Science, EarlyView.PLXDC2 was identified as a microglial target in Parkinson's disease through human and mouse single‐cell analyses. Ferritin‐armed biomimetic nanovesicles delivered PLXDC2 siRNA, deferoxamine, and CeO2 nanoparticles across the blood–brain barrier, reducing cGAS‐STING activation, iron burden, oxidative stress, and senescence in microglia, thereby ...
Heyue Lu +13 more
wiley +1 more source
The Effect of Lost Circulation Material on Herschel-Bulkley Parameters
, 2023 To hinder loss of drilling fluids into downhole formations while drilling geothermal, CO2 injection or petroleum wells, Lost Circulation Material (LCM) is added to the drilling fluids. These materials consist of many granular, fibrous, and flaky materials.
Sele, Karoline Gjestland +3 more
openaire +1 more source
Lost circulation technology development projects [PDF]
, 1990 Lost circulation is the phenomenon where circulating drilling fluid is lost to fractures or pores in the rock formation rather than returning to the surface through the wellbore annulus.
Glovka, D.A.
core
Advanced Science, EarlyView.After ischemic stroke, injured neurons transfer circMagi1 to endothelial cells through extracellular vesicles. Within endothelial cells, circMagi1 binds ANXA2 and enhances its engagement with TRIM65, promoting ANXA2 ubiquitination and proteasomal degradation to constrain angiogenic repair.
Youkun Bi +16 more
wiley +1 more source
Advanced Science, EarlyView.Extrusion‐based 3D printing of silicones and discrete electronic components are combined to create cortical implants for rodents that integrate thermal neuromodulation and electrical recording. Linked to an autonomous auxiliary driver unit, the system enables rapid, stable and localized hypothermia alongside ECoG recording.
Spencer Ryan Moore +6 more
wiley +1 more source
Macromolecular Materials and EngineeringLost circulation is a critical issue in drilling. This work reports the investigations on shape memory epoxy polymers (SMEPs) with high switching temperatures, and good thermal, mechanical and shape memory properties for plugging in deep drilling.
Qian Ma +5 more
doaj +1 more source