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  • Circulation Subs and Their Impact on Downhole Hydraulics, October 9 - 11, 2017

    Gefei Liu and John E McCormick, SPE-187151-MS, 2017 SPE Annual Technical Conference and Exhibition, San Antonio, Texas, Oct. 9 - 11, 2017

  • Displacement Demystified, March 2017

    Dr. Hu and Gefei Liu, Oilfield Technology, March 2017.
    In this article, Dr. Hu and Gefei Liu explain how to improve displacement efficiency in cementing jobs.

    Displacement Demystified | Drilling Engineering Paper | .pdf file
  • Design and Simulation of Foamed Cement Jobs (РАСЧЕТ И МОДЕЛИРОВАНИЕ ПРОЦЕССА ЦЕМЕНТИРОВАНИЯ ПРИ ПРИМЕНЕНИИ ВСПЕНЕННОГО ТАМПОНАЖНОГО РАСТВОРА), June 2015

    Gefei Liu, Russian Oil & Gas Technology magazine (OGT), June 2015.

    Design and Simulation of Foamed Cement Jobs | Drilling Engineering Paper | .pdf file
  • Factoring In The Top 5, June 2014

    Gefei Liu, Oilfield Technology Magazine, June 2014.
    In this article, Gefei Liu, Pegasus Vertex, Inc., USA, examines five main factors that must be taken into account when centralizing casing during cementing operations.

    Factoring in The Top 5 | Drilling Engineering Paper | .pdf file
  • CEMVIEW - Cementing Engineering Calculations Made Easy (ПРОГРАММА CEMVIEW ОБЛЕГЧАЕТ РАСЧЕТ ПАРАМЕТРОВ ЦЕМЕНТИРОВАНИЯ), January 2014

    Gefei Liu, Russian Oil & Gas Technology magazine (OGT), January 2014.

    Cementing Engineering Calculations Made Easy | Drilling Engineering Article | .pdf file
  • Torque and Drag - Every Drilling and Completion Engineer Should Know (ПРЕДСТАВЛЕНИЕ О КРУТЯЩЕМ МОМЕНТЕ И ТРЕНИИ), May 2013

    Gefei Liu, Russian Oil & Gas Technology magazine (OGT), May 2013.

    Torque and Drag - Every Drilling and Completion Engineer Should Know | Drilling Engineering Paper | .pdf file
  • Centralizer Placement Optimization (ОПТИМАЛЬНОЕ РАЗМЕЩЕНИЕ ЦЕНТРАТОРОВ ОБСАДНОЙ КОЛОННЫ), October 2012

    Gefei Liu, Russian Oil & Gas Technology magazine (OGT), October 2012.

  • Seeing Through Software, September 2012

    Gefei Liu, Cissy Zhao, Oilfield Technology Magazine, September 2012.

    Seeing Through Software | Drilling Engineering Article | .pdf file
  • Casing Wear: Causes, Prediction and Prevention (ИЗНОС ОБСАДНЫХ ТРУБ), May 2012

    Yuexi Zhao and Gefei Liu, Russian Oil & Gas Technology magazine (OGT), May 2012.

  • The ABC of T&D, February 2012

    Gefei Liu, Oilfield Technology Magazine, Feb 2012.

  • Comparing the Results of a Full-Scale Buckling Test Program to Actual Well Data: New Semi-Empirical Buckling Model and Methods of Reducing Buckling Effects, December 2011

    Authored by Sarah Mitchell and Dr. Norman Bruce Moore, WWT International Inc./ James Franks, Pioneer Natural Resources/ and Gefei Liu and Yanghua (Lily) Xiang, Pegasus Vertex Inc., SPE Drilling & Completion, Volume 26, Number 4, pp. 578-596, December 2011.

  • Drilling Software Reduces Risk and Optimizes Operation (УМЕНЬШЕНИЕ РИСКОВ И ОПТИМИЗАЦИЯ БЛАГОДАРЯ ИСПОЛЬЗОВАНИЮ ПРИ БУРЕНИИ ПРОГРАММНЫХ СРЕДСТВ), July 2011

    Rachel Bi and Gefei Liu, Russian Oil & Gas Technology magazine (OGT), July 2011.

  • Casing Wear in Extended Reach and Multilateral Wells, June 2010

    Ali Y. Garkasi, Yanghua Xiang and Gefei Liu, World Oil Magazine, June 2010.

  • Software Assists Wellbore Cleanup, January 2003

    Gefei Liu, Hart's E&P Magazine, January 2003.

  • Predicting Surge Pressures That Result From Running Liners, April 2001

    Gefei Liu, World Oil Magazine, April 2001.

  • Foam Computer Model Helps in Analysis of Underbalanced Drilling, July 1996

    Gefei Liu and George H. Medley, Oil & Gas Journal, July 1996.

  • Fracture Tip and Critical Stress Intensity Factor of a Hydraulically Induced Fracture, August 1993

    C.H. Yew and Gefei Liu, SPE Production & Facilities, August 1993.