CAD-Embedded CFD Helps Drill Bit Company Solve Erosion Problem







February 2009

Encore Bits LLC solved a difficult erosion problem in an oilfield drill bit by using FloEFD computational fluid dynamics software (CFD) from Mentor Graphics Mechanical Analysis (formerly Flomerics) to improve flow around the bit. Salvo made changes in the bit geometry and nozzle configuration that substantially increased its life and enhanced cuttings removal. “CFD helped us understand the problem and guided us as we iterated the design to an optimized solution,” said Vince Salvo, Design Engineer for Encore Bits.

Encore developed the F5165D to provide a bit that can drill an entire section of a well with only one bit and be rebuilt several times to reduce the costs for both the operator and Encore. Early versions of the bit showed an erosion problem affecting the ability to rebuild the bit. Encore sets its rental rates based on being able to rebuild these bits and an erosion problem will result in a substantial decrease in the profit margin.
Obviously, the drilling process provides no way to discover what kind of flow pattern might be causing this problem. Very large drill bit producers use traditional CFD codes that cost in the region of $25,000 to lease on an annual basis. An even greater cost for most companies is the need to hire experts to run the codes.

But in the last few years a new generation of CFD software has been introduced that addresses all the major reasons for the relative lack of use of CFD software. Its use of native 3D CAD data, automatic gridding of the flow space, the managing of flow parameters as object-based features helps eliminate the need for engineers to understand the computational part of CFD. Instead, the software enables them to focus on the fluid dynamics of the product which is already their responsibility to understand and master.

From the simulation results Salvo gained an understanding of the problem. This almost immediately gave him ideas on how to improve the flow performance of the design. He tried out these ideas, singly and in combination by first modifying the design in the familiar Pro/ENGINEER Wildfire CAD environment and then by simply pushing a button to re-run the embedded CFD simulation, in the fully-embedded Pro/ENGINEER environment available with FloEFD.Pro. With each design iteration, he gained additional insights that generated steady improvements.

“By altering the nozzle configuration and the blade shapes, we were able to achieve lower fluid velocities in critical positions while maintaining and somewhat increasing velocities in junk slot areas,” Salvo said. These changes resulted in a bit that has better cleaning and cooling ability while also improving the wear characteristics. Decreasing erosion also helps us prolong the life of this bit giving us better profitability over the product lifecycle. This project clearly demonstrates that FloEFD.Pro offers the potential for huge advancements to companies whose products involve fluid flow.”


For further information, please contact:

Nazita Saye
Head of Marketing
Mentor Graphics Mechanical Analysis, UK
81 Bridge Road
Hampton Court
Surrey, KT8 9HH
UK

Tel: +44 (0)20 8487 3000
Fax: +44 (0)20 8487 3001



Review Article Be the first to review this article
Trimble

Harris

Featured Video
Jobs
Currently No Featured Jobs
Upcoming Events
2017 Conference on Big Data from Space (BiDS'17) at Centre de Congrès Pierre Baudis Toulouse France - Nov 28 - 30, 2017
GeoDATA 2017 London Showcase at ILEC Conference Centre 4 Lillie Road London United Kingdom - Nov 30, 2017
Geospatial World Forum 2018 at Hyderabad International Convention Centre Hyderabad India - Jan 16 - 19, 2018
International LiDAR Mapping Forum at Hyatt Regency 650 15th Street, Denver CO - Feb 5 - 7, 2018
Teledyne Optech
University of Denver GIS Masters Degree Online
Teledyne:
CADalog.com - Countless CAD add-ons, plug-ins and more.



Internet Business Systems © 2017 Internet Business Systems, Inc.
25 North 14th Steet, Suite 710, San Jose, CA 95112
+1 (408) 882-6554 — Contact Us, or visit our other sites:
AECCafe - Architectural Design and Engineering EDACafe - Electronic Design Automation TechJobsCafe - Technical Jobs and Resumes  MCADCafe - Mechanical Design and Engineering ShareCG - Share Computer Graphic (CG) Animation, 3D Art and 3D Models
  Privacy PolicyAdvertise