The Sinusoidal Buckling Mechanical Analysis for the Coiled Tubing Based on Energy Method

Chun Sheng He; Ju Bao Liu; Qian Bei Yue; Yan Wang

doi:10.4028/www.scientific.net/AMM.477-478.141

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 477-478The Sinusoidal Buckling Mechanical Analysis for...

The Sinusoidal Buckling Mechanical Analysis for the Coiled Tubing Based on Energy Method

Abstract:

Columns are prone to sinusoidal buckling and repeated instability on the effect of drilling pressure and fluid pressure during drilling operation. The resulted large area of random contact to borehole wall would affect the drilling efficiency. It made the backreaming and loading hard and the drilling pressure low. Using energy method, taking flexural deformation energy and external potential energy of strings, hole section (slant hole, bending hole, level hole) and annular clearance etc. into consideration, derived the counting function of force that sinusoidal buckling occurred on coiled tubing when it contact with the wellbore, establishing the mechanical analysis method of calculating for sinusoidal buckling of slim lined construction roof bolt and string borehole. It proves an effective method for the applying of coiled tubing drilling pressure and the optimization of process parameters.

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Periodical:

Applied Mechanics and Materials (Volumes 477-478)

Pages:

141-145

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.477-478.141

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Online since:

December 2013

Authors:

Chun Sheng He, Ju Bao Liu, Qian Bei Yue*, Yan Wang

Keywords:

Coiled Tubing, Contact Force, Energy Method, Sinusoidal Buckling

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* - Corresponding Author

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