- Centralizers in Directional and Horizontal Wellbores - Are We Using Too Many or Too Few?, Feb. 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 Feb. 6, 2013.
- Torque and Drag Modeling Advanced Techniques and Troubleshooting, Oct. 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, Jun. 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.
Impact of Cuttings Concentration on ECD During Drilling, Apr. 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, Mar. 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, Oct. 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, Aug., 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.
- 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, Mar., 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.