The Structure Parameters Optimization of Variable Direction Joint During Extracting Casing in High-Inclination Directional Well

Ai Chi, YU Fahao, FENG Fuping, LÜ Deqing, YU Zhenning

Abstract


During extracting casing in high-inclination directional well, the existence of variable direction joint (VDJ) can enhance the build-up ability of washover string. And it can increase the compatibility between washover head and casing to some extent. However, too large or too small bending angle of VDJ will result in that the washover head cuts the upper and bottom parts of casing. Therefore, it is necessary to design reasonable bending angles for casing damage wells with different borehole curvature. In this paper, through the geometrical and mechanical analysis on the washover string with VDJ, a build-up rate calculation model and an axial force calculation model are established respectively. Moreover, through establishing the finite element model of washover tubing-ball-casing combination, the contact stress distribution is obtained. Under the critical condition of casing breaking when the contact stress exceeds the yield stress, the reasonable bending angle of VDJ matching with different casing damage well is designed. We can conclude that the research results play an important significance for in assuring the safe extracting casing.
Key words: Variable direction joint; Safe extracting; Parameters optimization; Casing damage well


Keywords


Variable direction joint; Safe extracting; Parameters optimization; Casing damage well

Full Text:

PDF

References


[1] Chen, M., Zhu, D. L., & Zhang, G. M. (2001). Application and development of deep casing taking technique. Petroleum Geology & Oilfield Development in Daqing, 20(3), 58-63.

[2] Ai, C., & Shi, X. D. (2010). Frictional resistance analysis and calculation of washover-string in process of extracting casing. Mechanics in Engineering, 32(1), 68-71.

[3] Shuai, J., Yu, Y. N., & Hong, X. F. (1996). Build-up rate calculation on short bent housing motor. Oil Drilling & Petroleum Technology, 18(1), 4-9.

[4] Wang, Z. J., Liu, G. H., & Li, J. (2009). Analysis and prediction of build-up rate using screw drill. Oil Field Equipment, 38(8), 61-65.

[5] Liu, X. W. (2013). Build-up rate calculation and application of bending screw drill with centralizer. Oil Field Equipment, 42(12), 90-93.

[6] Zhang, H. W. (2011). Safety analysis of the tubing in directional well based on the buckling theory (Doctoral dissertation). Xi’an Shiyou University, Xi’an, China.

[7] Zhang, Y. A. (2011). Research on key problems of mechanics for multi-packers fracturing strings pass ability in horizontal well (Doctoral dissertation). Northeast Petroleum University, Daqing, China.

[8] Gao, D. L., & Gao, B. K. (2000). Effects of tubular buckling on torque and dragin horizontal well. Journal of the University of Petroleum (China), 24(2), 1-3.




DOI: http://dx.doi.org/10.3968/6810

Refbacks

  • There are currently no refbacks.


Copyright (c)




Share us to:   


Reminder

  • How to do online submission to another Journal?
  • If you have already registered in Journal A, then how can you submit another article to Journal B? It takes two steps to make it happen:

1. Register yourself in Journal B as an Author

  • Find the journal you want to submit to in CATEGORIES, click on “VIEW JOURNAL”, “Online Submissions”, “GO TO LOGIN” and “Edit My Profile”. Check “Author” on the “Edit Profile” page, then “Save”.

2. Submission

  • Go to “User Home”, and click on “Author” under the name of Journal B. You may start a New Submission by clicking on “CLICK HERE”.

We only use three mailboxes as follows to deal with issues about paper acceptance, payment and submission of electronic versions of our journals to databases:
caooc@hotmail.com; aped@cscanada.net; aped@cscanada.org

 Articles published in Advances in Petroleum Exploration and Development are licensed under Creative Commons Attribution 4.0 (CC-BY)

ADVANCES IN PETROLEUM EXPLORATION AND DEVELOPMENT Editorial Office

Address: 9375 Rue de Roissy Brossard, Québec, J4X 3A1, Canada

Telephone: 1-514-558 6138
Website: Http://www.cscanada.net
Http://www.cscanada.org
E-mail:office@cscanada.net;  office@cscanada.org

Copyright © 2010 Canadian Research & Development Centre of Sciences and Cultures