A Calculation Method for WOB Conducting of Directional Well

Abstract:

In the course of drilling fordirectional well and horizontal well,thefriction of drill string affects the WOBconducting directly,the WOBat bottom hole is often lower than the WOBexpected,whichaffects the drilling efficiency seriously.Therefore,analyzing the WOB conductingscientificallyand calculating the actual WOBat bottom hole accurately is the key for ensuring the drilling efficiency. The effectof mud on the axial force and the structural characteristicsof drill string are considered before analyzing the force of drill string in directionalwell. Then basedon the hook load, the actual WOB at bottom hole can be calculated by establishingthe WOB conducting model for directional well,which results in practicalsignificance for analyzing WOB conducting, guiding the drilling constructionand improving drilling efficiency.

• Periodical: Applied Mechanics and Materials (Volume 318)
• Pages: 196-199
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.318.196
• Online since: May 2013
• Authors: Shuang Jin Zheng, Zhi Qiang Huang, Hong Jian Wu
• Keywords: Directional Well, Friction, Hook Load, WOB Conducting

References

[1] Johancsik C. A., Friesen, D.B., Dawson, Rapier, etc. Torque and Drag in Directional Wells 0×96 Prediction and Measurement [J]. JPT, June 1984.

DOI: 10.2118/11380-pa

[2] Ho H-S. An improved Modeling Program for Computing the Torque and Drag in Directional and Deep Wells [J]. SPE 18047, 1987.

[3] Ma shanzhou, Han zhiyong. Calculation of Friction Force and Torque for Drill String in Horizontal Well [J]. Journal of Petroleum University, (Natural Science Edition) ,1996, 20 (6):24-28.

[4] Liu qingyou, Meng qinghua, Pang xiaodong. Research and Application of Drilling Simulation System [M]. Beijing: Science Press. 2009,1:97-98.