Presentations

  • Centralizers - Are we Using Too Many or Too Few, October 30, 2014
    Gefei Liu, the president of Pegasus Vertex, Inc., gave a presentation at the Lafayette Petroleum Club SPE Workshop on Thursday, October 30, 2014 in Lafayette, LA.
    This SPE workshop was organized by Evangeline SPE section. More than 60 people from industry and universities attended the lunch workshop.
    Gefei Liu Presentation in Lafayette Centralizers
  • Centralizers in Directional and Horizontal Wellbores - Are We Using Too Many or Too Few?,
    February 6, 2013

    Gefei Liu, president of PVI, gave a presentation entitled, “Centralizers in Directional and Horizontal Wellbores – Are We Using Too Many or Too Few?” to Canadian Association of Drilling Engineers (CADE) at Westin Hotel in downtown Calgary on February 6, 2013.
    2013-CADE
  • Torque and Drag Modeling Advanced Techniques and Troubleshooting, October 8 - 10, 2012
    John McCormick from Halliburton and Gefei Liu from Pegasus Vertex, Inc., gave a presentation (SPE 156945) entitled "Torque and Drag Modeling Advanced Techniques and Troubleshooting" during the 2012 SPE Annual Technical Conference and Exhibition, at the Henry B. Gonzalez Convention Center, San Antonio, Texas, on October 8 - 10, 2012.
  • Centralizer Selection and Placement Optimization, June 21, 2012
    Lawrence Weber from Chevron and Gefei Liu from Pegasus Vertex, Inc. gave a presentation (SPE 150345) entitled, "Centralizer Selection and Placement Optimization" at the 2012 SPE Deepwater Drilling Conference and Exhibition, at Moody Gardens Hotel, Galveston, Texas, on June 21, 2012.
    Click on the thumbnail below to watch a brief casing centralizer placement introduction video.
    Casing Centralizer Placement Video
  • Impact of Cuttings Concentration on ECD During Drilling, April 10, 2012
    Yanghua (Lily) Xiang and Gefei Liu from Pegasus Vertex, Inc. gave a presentation entitled, "Impact of Cuttings Concentration on ECD During Drilling" during the 2012 AADE Fluids Technical Conference and Exhibition, at the Hilton Houston North, Houston, Texas, on April 10, 2012.
  • Improving Casing Wear Prediction and Mitigation Using a Statistically Based Model, ePoster 151448, March 6, 2012
    ePoster by S.B. Mitchell from WWT International and Y.L. Xiang from Pegasus Vertex. during the IADC/SPE Drilling Conference and Exhibition at Town and Country Resort & Convention Center, San Diego, California, March 6, 2012.
  • Casing Wear Prediction and Prevention, October 21, 2011
    Yanghua (Lily) Xiang and Gefei Liu from Pegasus Vertex, Inc. gave a presentation entitled "Casing Wear Prediction and Prevention" during the 2011 CAPA PETROLEUM AND PETROCHEMICAL TECHNICAL SYMPOSIUM on Friday, October 21, 2011.
  • CT Reach Analysis, August 2011
    Gefei Liu, president of PVI, gave a lunch-n-learn presentation entitled, "CT Reach Analysis" in Houston (ICoTA USA Chapter), August 9, 2011.
    There were more than 70 people pre-registered and attended this event.
    presentation at ICoTA
  • Comparing the Results of a Full-Scale Buckling Test Program to Actual Well Data: A New Semi-Emprical Buckling Model and Methods of Reducing Buckling Effects, SPE Paper Number:  144535-PP, March 2011
    Authored by Sarah Mitchell and Dr. Norman Bruce Moore, WWT International Inc.; James Franks, Pioneer Natural Resources; and Gefei Liu and Yanghua (Lily) Yang, Pegasus Vertex Inc.
    This paper was prepared for presentation at the SPE Western North American Regional Meeting held in Anchorage, Alaska, USA, May 7-11,2011.
ICoTA
2013CADE
Gefei Liu Presentation in Lafayette Centralizer