Failure analysis and improvement measures of step transition zone of drill pipe joint

2020 ◽  
Vol 109 ◽  
pp. 104211
Author(s):  
Zhi Zhang ◽  
Xiaohua Zhu
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 ◽  
...  

2022 ◽  
Vol 133 ◽  
pp. 105949
Author(s):  
Ganlin Cheng ◽  
Fei Guo ◽  
Xiaohua Zang ◽  
Zhaoxiang Zhang ◽  
Xiaohong Jia ◽  
...  

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Zhiqiang Huang ◽  
Zhongquan Yin ◽  
Wei Wu

Purpose The purpose of this study is to solve the oil drill pipe joints and casing excessive wear problems and to improve the drill pipe joint-casing wear resistance and anti-friction properties. Design/methodology/approach On the surface of the drill pipe joints using oxyacetylene flame bead weld (BW) wear-resistant welding wire ARNCO-100XTTM prepares welding layer, high-velocity oxygen fuel (HVOF) Cr3C275-NiCr25 prepares coating and subsonic flame spray and remelt (SFSR) Ni60 prepares coating, then comparing and analyzing the friction and wear of the three types of wear-resistant layers and the casing under the condition of 1.8 g/cm3 mud drilling fluid lubrication. The wear resistance and anti-friction performance of the drill pipe joints were evaluated based on the wear situation, finally revealing its friction and wear mechanisms. Findings Three types of wear-resistant layers can improve the surface wear resistance of drill pipe joints, the wear-resistant layer and the substrate are well combined and the welding layers and coating are both dense and uniform. The wear resistance of the HVOF-Cr3C275-NiCr25 coating is 10.9 times that of the BW-ARNCO-100XTTM weld layer, and the wear resistance of the SFSR-Ni60 weld layer is 2.45 times that of the BW-ARNCO-100XTTM weld layer. The anti-friction properties of SFSR-Ni60 welding layer is the best, followed by HVOF-Cr3C275-NiCr25 coating, and the anti-friction properties of BW-ARNCO-100XTTM welding layer is the worst among the three. Originality/value The research results of this paper have great practical value in the process and material of improving the wear resistance and anti-friction performance of the drill pipe joint casing.


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.


Materials ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7379
Author(s):  
Hao Yin ◽  
Jian Liang ◽  
Xiaoyong Ren ◽  
Jie Zhao ◽  
Xin He ◽  
...  

Coating on the surface is one of the main ways to improve the corrosion resistance and wear resistance of materials. In this work, the corrosion, erosion, and wear resistance of WC–10Co4Cr coating and 27CrMoV substrate were compared by simulating the actual working conditions of the drill pipe. The simulation results show that the most serious corrosion occurred at the pipe body and the dominating erosion arose at the pipe joint closing to the inlet of the flow field. WC–10Co4Cr coating has excellent protection to 27CrMoV substrate, resulting in a 400 mV increase in corrosion potential, a two-orders-of-magnitude decrease in the corrosion current, and four times the improvement of the impedance value. The erosion resistance of the WC–10Co4Cr coating increased to more than 30% higher than that of the 27CrMoV substrate. The friction coefficient of the WC–10Co4Cr coating was much lower than that of the 27CrMoV substrate, and the wear resistance of the coating was higher than that of the substrate.


Petroleum ◽  
2019 ◽  
Vol 5 (1) ◽  
pp. 102-112 ◽  
Author(s):  
Liangliang Dong ◽  
Xiaohua Zhu ◽  
Desheng Yang

Sign in / Sign up

Export Citation Format

Share Document