Mechanics in Engineering ›› 2018, Vol. 40 ›› Issue (3): 289-293.DOI: 10.6052/1000-0879-17-392

• Applied Research • Previous Articles     Next Articles

AN EXPERIMENT OF FRICTION OF COILED TUBING WITH RESIDUAL DEFORMATION IN HORIZONTAL WELL

ZHOU Zhihong1, LÄU Zhang, YIN Zhuocheng, ZHENG Guang, YU Li, PENG Xiongwen   

  1. School of Mechanical Engineering, Yangtze University, Jingzhou 424023, Hubei, China
  • Received:2017-11-13 Revised:2018-03-16 Online:2018-06-15 Published:2018-07-17

Abstract:

The coiled tubing (CT) drilling technology is extensively employed in various operations of oil wells.The residual deformation of the CT caused by the winding on the reel has a magnificent effect on its extension length in horizontal wells. The friction curve fitting functions for various ratios of the diameter of the pipe to that of the tube and the residual deformation curve are obtained through similar experiments. The similarity of the model experiment and the actual coiled tubing operation is analyzed and the similarity constants are obtained, and then the friction between the coiled tubing and the casing wall is calculated. The final results show that the friction of a 2-inch CT with a residual deformation in the horizontal well is about 2.3 times of that of the CT without the residual deformation.

Key words:

coiled tubing|friction|residual deformation|horizontal well

CLC Number: