Failure analysis of 127mm G105 drill pipe

Author(s):  
Li Fangpo ◽  
Liu Yonggang ◽  
Lu Caihong
Keyword(s):  
2011 ◽  
Vol 314-316 ◽  
pp. 1210-1213
Author(s):  
Fang Po Li ◽  
Yong Gang Liu ◽  
Wang Yong

The failure cause of Φ127mm G105 IEU drill pipe upset was investigated through mechanical properties testing, optical morphologies and fracture surface analysis. The result show that drill pipe upset’s failure reason is the elephant hide and decarburization layer in its out-surface caused by improper upset treatment in forging process. Elephant hide and decarburization layer existing in drill pipe upset changed seriously reduced its strength and fatigue property. Under the effect of alternating stresses, the crack first initiated from the deepest position of elephant hide and developed quickly. In the end, it leaded the drill pipe to early piecing failure.


2013 ◽  
Vol 31 ◽  
pp. 255-267 ◽  
Author(s):  
Yuanhua Lin ◽  
Xing Qi ◽  
Dajiang Zhu ◽  
Dezhi Zeng ◽  
Hongjun Zhu ◽  
...  

2013 ◽  
Author(s):  
Yonggang Liu ◽  
Zhanghua Lian ◽  
Tiejun Lin ◽  
Fangpo Li ◽  
Changqig Chen

2019 ◽  
Vol 14 (2) ◽  
Author(s):  
Deden Suripto

The a research on the damage of tubing-drill pipes at an oil company, has been carried out. Failure of the component may be caused by many factors including material selection and their mishandling during in service. The objective of this research was to find out the reason of any failure or defects of a material during in, some testing methods were used, namely: visual and dimensions test, strength and hardness tests, macroscopic and microscopic test, the chemical analysis of material test, and SEM/EDS test. The results of proved that there were some corrosive elements such as the Cl and S-2 so that there was a the potential for the occurence of pitting and crevice corrosivation at the end of screws and these will be penetrated into the passivation layers of Fe2O3 that absorb aggressive anions such as Cl - and S-2.Keywords : failure analysis, drill pipe, corrosionAbstrak Penelitian terhadap kerusakan pada pipa ulir pada lingkungan perminyakan ,telah dilakukan. Kegagalan dari suatu komponen dapat disebabkan oleh berbagai macam faktor, mulai dari kesalahan pemilihan material sampai dengan kesalahan operator dalam service-nya. Tujuan penelitian adalah untuk mencari penyebab kegagalan terjadinya cacat pada material tubing setelah dioperasikan. Untuk mengetahui penyebabnya dilakukan analisa kegagalan dengan menggunakan beberapa metode, yaitu: pemeriksan visual dan dimensi, pengujian tarik dan kekerasan, pemeriksaan makroskopis dan mikroskopis, pengujian komposisi kimia bahan, dan pengujian SEM/EDS. Hasil penelitian membuktikan bahwa adanya unsur korosif dalam material seperti CL- dan S-2 sehingga sangat potensial untuk terjadinya serangan korosi sumuran maupun korosi celah kikisan pada ujung ulir dan akan berpenetrasi pada lapisan pasivasi Fe2O3 yang sifatnya mengabsorbsi anion-anion agresif seperti CL- dan S-2Kata kunci : analisis kegagalan, pipa ulir, korosi.


2014 ◽  
Vol 3 ◽  
pp. 447-453 ◽  
Author(s):  
Yan Han ◽  
Xuehu Zhao ◽  
Zhenquan Bai ◽  
Chengxian Yin
Keyword(s):  

ICPTT 2012 ◽  
2012 ◽  
Author(s):  
Jianjun Wang ◽  
Yaorong Feng ◽  
Xiangzhen Yan ◽  
Hanxiu Peng ◽  
Zhiyong Luan

2016 ◽  
Vol 59 ◽  
pp. 605-623 ◽  
Author(s):  
Sajad Mohammad Zamani ◽  
Sayed Ali Hassanzadeh-Tabrizi ◽  
Hassan Sharifi
Keyword(s):  

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