Hydrodynamic and hydromagnetic stability

https://www.tpbin.com/Uploads/Subjects/028d1af0-9f8c-4286-a4d7-9948123aa14a.pdf

Recent advances in the field of cement hydration and microstructure analysis

CFD–DEM approach to investigate the effect of drill pipe rotation on cuttings transport behavior

Real time prediction of drilling fluid rheological properties using Artificial Neural Networks visible mathematical model (white box)

Experimental investigation of hole cleaning in directional drilling by using nano-enhanced water-based drilling fluids

This experimental study focuses on the rheological characterization of polymer-based drilling foams using a Foam Generator/ Viscometer. This apparatus generates and replenishes foam to a flow-through Couette viscometer. Experimental results show that besides foam quality, liquid phase rheology plays a great role in foam rheology and wall roughness also affects rheology

Rheology Characterization of Polymer Drilling Foams using a Novel Apparatus

A Fast Graphic Approach To Estimate Hole Cleaning for Directional Drilling

The key to successful drilling through a narrow operating window zone and using MPD operations is to apply proper annular backpressure to get the desired bottom hole pressure. This requires accurate knowledge of the pressure loss in the wellbore. Solids have important effects on annular pressure profile, which must be considered when drilling through a narrow mud window zone and using MPD operations. This paper focuses on the effects of real-time solids monitoring on the wellbore pressure profile. A practical approach is proposed to determine the solids concentration and solids behavior in different positions of the wellbore at any time during drilling, which can give an accurate real-time annular pressure profile in the well. To study the solids behavior in the wellbore, a series of experiments were conducted on a 90-ft-long, 4.5”×8” full-scale flow loop to simulate field conditions. Solids concentration, bed development and pressure gradient as a function of time were recorded. A solid-liquid moving pattern map including fluid velocity, ROP, inclination angle and fluid properties has been developed for practical applications. Engineering formulas have been proposed to account for the complex solids behaviors in calculating a real-time annular pressure profile in the wellbore. Results of this work can be used to precisely control the annular pressure profile, guide the setting of annular backpressure in MPD, operation parameter optimization and well path design. Examples of applications of this method are shown in the paper.

Nicholas Takach

Papers

Rheology Characterization of Polymer Drilling Foams using a Novel Apparatus

A Fast Graphic Approach To Estimate Hole Cleaning for Directional Drilling

Application Of Real-Time Solids Monitoring in Well Design, Annulus Pressure Control And Managed Pressure Drilling

Experimental Study of Aerated Mud Flows under Horizontal Borehole Conditions

Rheology and Hydraulics of Polymer (HEC) Based Drilling Foams at Ambient Temperature Conditions