|
|
|
| MECHANISM OF EROSION-CORROSION WASHOUT FAILURE IN INTERNAL UPSET TRANSITION ZONE FOR DRILLPIPE BASED ON APPLICATION OF FLOW FIELD ANALYSIS |
| LIU Wenhong, LI Lei, LIU Yonggang, PAN Zhiyong, WANG Jianjun |
| Key Laboratory of Oil Tubular Goods Engineering，Tubular Goods Research Center of CNPC，Xi'an 710065 |
|
|
|
|
Abstract The velocity field and pressure field of Φ127 mm API drill pipe washout failure were simulated respectively by using the method of computational fluid dynamics. The result shows that flow field induced by the existence of the drill pipe corrosion pits plays a role of linking the role of failure, the deeper the corrosion pits, the larger the turbulent kinetic energy at the bottom of the pits； the more the entrance flow rate, the greater the part of the shear stress at the corrosion pits, the more the leakage of the drill pipe. In the same operating conditions, the box end of the drill pipe are more easy leakage than that of the pin end which are closely related to the Bernoulli effect；When very small slip appeared in the pipe body, the drill pipe usually washed out at the upper location of the well, this is mainly according to the annular pressure, when the annular pressure are small, the turbulent energy and the maximum velocity were usually occurred at the location.
|
|
Received: 18 August 2010
|
|
|
|
Corresponding Authors:
LIU Wenhong
E-mail: liuwenhong001@cnpc.com.cn
|
Cite this article:
LIU Wenhong, LI Lei, LIU Yonggang, PAN Zhiyong, WANG Jianjun. MECHANISM OF EROSION-CORROSION WASHOUT FAILURE IN INTERNAL UPSET TRANSITION ZONE FOR DRILLPIPE BASED ON APPLICATION OF FLOW FIELD ANALYSIS. J Chin Soc Corr Pro, 2011, 31(2): 160-164.
URL:
https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2011/V31/I2/160
|
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
