EKSPERIMENTAL'NOE ISSLEDOVANIE GIDRODINAMIKI DVUKHFAZNYKH POTOKOV V VERTIKAL'NYKH TRUBAKH. (Experimental Studies of Hydrodynamics of Two-Phase Flow in Vertical Tubes).

The present invention provides compounds with imaging moieties for imaging a subject. The present invention also relates to systems, compositions, and methods for the synthesis and use of imaging agents, or precursors thereof. An imaging agent precursor may be converted to an imaging agent using the methods described herein. In some cases, a composition or plurality of imaging agents is enriched in 18 F. In some cases, an imaging agent may be used to image an area of interest in a subject, including, but not limited to, the heart, cardiovascular system, cardiac vessels, brain, and other organs.

Compositions, methods, and systems for the synthesis and use of imaging agents

An experimental investigation of single Taylor bubbles rising in stagnant and downward flowing non-Newtonian fluids was carried out in an 80 ft long inclined pipe (4°, 15°, 30°, 45° from vertical) of 6 in. inner diameter. Water and four concentrations of bentonite–water mixtures were applied as the liquid phase, with Reynolds numbers in the range 118 < Re < 105,227 in countercurrent flow conditions. The velocity and length of Taylor bubbles were determined by differential pressure measurements. The experimental results indicate that for all fluids tested, the bubble velocity increases as the inclination angle increases, and decreases as liquid viscosity increases. The length of Taylor bubbles decreases as the downward flow liquid velocity and viscosity increase. The bubble velocity was found to be independent of the bubble length. A new drift velocity correlation that incorporates inclination angle and apparent viscosity was developed, which is applicable for non-Newtonian fluids with the Eotvos numbers (E0) ranging from 3212 to 3405 and apparent viscosity (μapp) ranging from 0.001 Pa∙s to 129 Pa∙s. The proposed correlation exhibits good performance for predicting drift velocity from both the present study (mean absolute relative difference is 0.0702) and a database of previous investigator’s results (mean absolute relative difference is 0.09614).

Experimental Study of Single Taylor Bubble Rising in Stagnant and Downward Flowing Non-Newtonian Fluids in Inclined Pipes

Wellbore drift flow relation suitable for full flow pattern domain and full dip range

Eric R. Upchurch

Papers

An improved drift-flux correlation for gas-liquid two-phase flow in horizontal and vertical upward inclined wells

Experimental Study of Single Taylor Bubble Rising in Stagnant and Downward Flowing Non-Newtonian Fluids in Inclined Pipes

Computational Fluid Dynamics Simulations of Taylor Bubbles Rising in Vertical and Inclined Concentric Annuli

Geo-Stopping Using Deep Directional Resistivity LWD: A New Method for Well Bore Placement Using Below-the-Bit Resistivity Mapping

Blowout Prevention and Relief-Well Planning for the Wheatstone Big-Bore Gas-Well Project