Experimental Study of Polymer-free and Polymer-added Foams for Underbalanced Drilling: Are Two Foam-Flow Regimes Still There?

2012 ◽  
Author(s):  
Ali Reza Edrisi ◽  
Rahul Narayanrao Gajbhiye ◽  
Seung Ihl Kam
Keyword(s):  
Experimental Study ◽  
Flow Regimes ◽  
Foam Flow ◽  
Underbalanced Drilling

Experimental Study of Polymer-Free and Polymer-Added Foams for Underbalanced Drilling: Are Two Foam-Flow Regimes Still There?

SPE Journal ◽  
2013 ◽  
Vol 19 (01) ◽  
pp. 55-68 ◽  
Author(s):  
A.R.. R. Edrisi ◽  
R.N.. N. Gajbhiye ◽  
S.I.. I. Kam
Keyword(s):  
Steady State ◽  
Flow Pattern ◽  
Plug Flow ◽  
Flow Regimes ◽  
High Quality ◽  
Pressure Drops ◽  
Foam Flow ◽  
Underbalanced Drilling ◽  
Segregated Flow ◽  
State Pressure

Summary The foam-assisted underbalanced-drilling technique is more advantageous than the traditional overbalanced drilling near the productive water-sensitive formations because of its reduced formation damage, improved rate of penetration, higher cuttings-transport capacity, and lower circulation losses. However, the complicated nature of foam rheology has been a major impediment to the optimal design of field applications. Earlier studies with surfactant foams without oils and polymers show that foam flow in pipe can be represented by two different flow regimes: the low-quality regime showing either plug-flow or segregated-flow pattern, and the high-quality regime showing slug-flow pattern. The objective of this study is to investigate foam-flow characteristics in horizontal pipes at different injection conditions, with or without oils, by using polymer-free and polymer-added surfactant foams. The results of this study were presented in two different ways—by steady-state pressure drops (or, apparent foam viscosity, equivalently) measured by multiple pressure taps and by the visualization of bubble size, size distribution, and flow patterns in transparent pipes. The results with surfactant foams and oil showed that first, oil reduced the stability of foams in pipes, thus decreasing the steady-state pressure drops and foam viscosities, and second, the presence of oil tended to lower the transition between the high-quality and the low-quality regimes (i.e., lower foam quality at the boundary, or lower f*g equivalently). In addition, the results with surfactant foams with polymer showed that first, polymer thickened the liquid phase and, if enough agitation was supplied, could make foams long-lived and increase foam viscosities, and second, the system sometimes did not reach the steady state readily, showing systematic oscillations. In both cases, though, the experiments carried out in this study showed the presence of two distinct high-quality and low-quality flow regimes.

Experimental Study of Particle Size, Sound Velocity, and Resonance Phenomena in a Two-Phase Foam Flow

2001 ◽  
Vol 32 (4-6) ◽  
pp. 5
Author(s):  
A. P. Sevast'yanov ◽  
I. V. An ◽  
S. I. Vainshtein ◽  
Yu. A. Sevast'yanov ◽  
A. V. Sidnev ◽  
...  
Keyword(s):  
Experimental Study ◽  
Particle Size ◽  
Sound Velocity ◽  
Two Phase ◽  
Foam Flow ◽  
Resonance Phenomena

An Examination of Flow Regimes Associated With Inkjet-Printed Colloidal Drops

2008 ◽  
Author(s):  
Vadim Bromberg ◽  
Sailee Gawande ◽  
Ying Sun ◽  
Timothy Singler
Keyword(s):  
Experimental Study ◽  
Radial Flow ◽  
Internal Flow ◽  
Flow Regimes ◽  
Solid Substrate ◽  
Marangoni Flow ◽  
Single Group ◽  
Evaporation Dynamics

An experimental study of the evaporation dynamics for an inkjet-printed drop on a solid substrate has been attempted. Using fluorescent spherical colloids, the internal flow of an evaporating drop has been observed directly. During the initial stages of the process, a novel inward radial flow carries the particles as a single group towards the center of the drop. Once the particles have converged near the center, a significantly slower outward radial flow proceeds. These flow regimes are qualitatively analyzed and their relationship to a possible thermal Marangoni flow is discussed.

scholarly journals Experimental Study of Non-Newtonian Behavior of Foam Flow in Highly Permeable Porous Media

2020 ◽  
Vol 59 (27) ◽  
pp. 12568-12579 ◽  
Author(s):  
Sagyn Omirbekov ◽  
Hossein Davarzani ◽  
Azita Ahmadi-Senichault
Keyword(s):  
Experimental Study ◽  
Porous Media ◽  
Foam Flow ◽  
Newtonian Behavior

Experimental study of flow regimes and dust emission in a free falling particle stream

2016 ◽  
Vol 292 ◽  
pp. 14-22 ◽  
Author(s):  
Yi Wang ◽  
Xiaofen Ren ◽  
Jiangping Zhao ◽  
Zongkun Chu ◽  
Yingxue Cao ◽  
...  
Keyword(s):  
Experimental Study ◽  
Dust Emission ◽  
Flow Regimes ◽  
Particle Stream ◽  
Free Falling
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