Application of Multiphase Flow Methods to Horizontal Underbalanced Drilling

2000 ◽  
Vol 39 (10) ◽  
Author(s):  
S.P. Smith ◽  
G.A. Gregory ◽  
N. Munro ◽  
M. Muqeem
Keyword(s):  
Multiphase Flow ◽  
Underbalanced Drilling

Underbalanced Drilling Analysis of Naturally Fractured Mexican Fields through 2D Multiphase Flow

2000 ◽  
Author(s):  
D. Velazquez Cruz ◽  
H. Rodriguez-Hernandez ◽  
I. Cortes-Monroy ◽  
D. Azpeitia-Hernandez ◽  
J. Blanco-Galan
Keyword(s):  
Multiphase Flow ◽  
Underbalanced Drilling ◽  
Naturally Fractured

scholarly journals Characteristics of a non-circulating transient flow during gas invasion in the underbalanced drilling process

2019 ◽  
Vol 23 (4) ◽  
pp. 2257-2264
Author(s):  
Na Wei ◽  
Ying-Feng Meng ◽  
An-Qi Liu ◽  
Hai-Tao Li ◽  
Lin Jiang ◽  
...  
Keyword(s):  
Multiphase Flow ◽  
Transient Flow ◽  
Mathematic Model ◽  
Simulation Method ◽  
Pressure Profile ◽  
Drilling Process ◽  
Transient Pressure ◽  
Underbalanced Drilling ◽  
Wellbore Flow ◽  
Gas Liquid Flow

The wellbore flow in a liquid-based underbalanced drilling process consists of a steady multiphase flow during normal drilling and a transient gas-liquid flow without mud-cycling. The theory of steady multiphase flow has been used to calculate the pressure profile of normal drilling. Therefore, it is vital to figure out how to calculate the transient pressure variation caused by formation fluid flow-ing into wellbore when the mud-cycling is stopped. In this paper, a numerical simulation method and a mathematic model are established to study the wellbore flow and to control pressure during the underbalanced drilling process with liquid-based mud. The results also shed a light on the hidden mechanism of this special flow.

The Virtual Well Engineer – A Real – Time Surveillance Tool for Managed Pressure Drilling Operations

2007 ◽  
Vol 18-19 ◽  
pp. 277-285
Author(s):  
Babs Mufutau Oyeneyin ◽  
Phil Burge ◽  
Lisa Hogg ◽  
Chris Anderson
Keyword(s):  
Multiphase Flow ◽  
Complex Environments ◽  
Hole Cleaning ◽  
Functional Capabilities ◽  
Drilling Performance ◽  
Underbalanced Drilling ◽  
Pressure Profiles ◽  
Managed Pressure Drilling ◽  
Engineering Team ◽  
Drilling Operations

Well engineers face ever increasing technical challenge of drilling in complex environments and the use of Managed Pressure Drilling(MPD) techniques to control annular pressure for improved drilling performance in the oil industry has growing interest[1-4]. Understanding hole cleaning and controlling annular pressure in this complex environment is becoming increasingly important for a range of applications. The Virtual Well Engineer[VWE] has been identified as the engineering tool to address these issues in order to deliver a successful MPD operation. The VWE is the product name for a suite of well planning , monitoring and simulation packages with focus on Managed Pressure Drilling includng underbalanced drilling that allows the well engineering team to interact with virtual reality. Recent works initiated by the Well Engineering Group at The Robert Gordon University have extended the knowledge of multiphase flow in a drilling annulus through the tracking of the transient multiphase flow pattern prevailing and effects on hole cleaning , the pressure profiles and identification of hot spots in concentric and eccentric annular sections . The mechanistic models developed at RGU form the core algorithms for the VWE. This paper presents the architecture and functional capabilities of the VWE – HydraulicsDTS™ , which is used in simulating well operations.

scholarly journals Prediction of frictional pressure loss for multiphase flow in inclined annuli during Underbalanced Drilling operations

2016 ◽  
Vol 3 (4) ◽  
pp. 275-282 ◽  
Author(s):  
Ali Barati-Harooni ◽  
Adel Najafi-Marghmaleki ◽  
Afshin Tatar ◽  
Milad Arabloo ◽  
Le Thi Kim Phung ◽  
...  
Keyword(s):  
Multiphase Flow ◽  
Pressure Loss ◽  
Underbalanced Drilling ◽  
Drilling Operations

Investigation on the control of multiphase flow behavior in a continuous casting tundish during ladle change

2020 ◽  
Vol 117 (6) ◽  
pp. 619
Author(s):  
Rui Xu ◽  
Haitao Ling ◽  
Haijun Wang ◽  
Lizhong Chang ◽  
Shengtao Qiu
Keyword(s):  
Multiphase Flow ◽  
Flow Behavior ◽  
Rolled Strip ◽  
Impact Zone ◽  
Steel Cleanliness ◽  
Carry Over ◽  
Slag Carry Over ◽  
Hot Rolled ◽  
Turbulence Inhibitor ◽  
The Impact

The transient multiphase flow behavior in a single-strand tundish during ladle change was studied using physical modeling. The water and silicon oil were employed to simulate the liquid steel and slag. The effect of the turbulence inhibitor on the slag entrainment and the steel exposure during ladle change were evaluated and discussed. The effect of the slag carry-over on the water-oil-air flow was also analyzed. For the original tundish, the top oil phase in the impact zone was continuously dragged into the tundish bath and opened during ladle change, forming an emulsification phenomenon. By decreasing the liquid velocities in the upper part of the impact zone, the turbulence inhibitor decreased considerably the amount of entrained slag and the steel exposure during ladle change, thereby eliminating the emulsification phenomenon. Furthermore, the use of the TI-2 effectively lowered the effect of the slag carry-over on the steel cleanliness by controlling the movement of slag droplets. The results from industrial trials indicated that the application of the TI-2 reduced considerably the number of linear inclusions caused by ladle change in hot-rolled strip coils.

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