Analiza przyczyn pęknięć w złączu rura płuczkowa-zwornik w wiertnictwie
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Abstract
W pracy omówiono przyczyny występowania pęknięć złączy rura-zwornik podczas eksploatacji rur płuczkowych. Na podstawie badań stwierdzono niewłaściwy sposób wykonania złącza elektrody zostały źle dobra- ne i sprzyjały powstawaniu pęknięć. Ujawniono również wykorzystanie do produkcji rur płuczkowych niewłaściwego gatunku stali. Dla porównania przedstawiono zmiany właściwości i mikrostruktury złącza rura-zwornik wykonanego metodą zgrzewania tarciowego.
Analysis of the causes of cracks in the drill pipe-nipple joint region
Abstract
The paper presents analysis of the causes of cracks in the pipe-nipple joint region of the drill pipes occurred during service. The results of performed examinations showed the wrong way of making the pipe-nipple joint by welding instead of friction welding. In addition, electrodes used for welding were incorrect and favored crack nucleation and propagation in the heat affected zone of nipple joint. Also discloses the use of the drill pipe of the wrong steel grade. The changes in hardness and microstructure of the pipe-nipple joint properly made by friction welding were shown for comparison.
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References
Han L., Hu F., Wang H., Feng Y., Li H.: A new method to determine the required impact toughness for petroleum drill pipe used in critical sour environment. Procedia Engineering, 16, (2011), 667÷672.
Miscow G.F., de Miranda P.E.V., Netto T.A., Plácido J.C.R.: Techniques to characterize fatigue behaviour of full size drill pipes and small scale samples. International Journal of Fatigue, 26, (2004), 575÷584.
Liu Y., Li F., Xu X., Yang B., Lu C.: Simulation technology in failure analysis of drill pipe. Procedia Engineering, 12, (2011), 236÷241.
Li F., Liu Y., Wang X., Lu C.: Failure analysis of Ø127 mm IEU G105 drill pipe wash out. Engineering Failure Analysis, 18, (2011), 1867÷1872.
Shuan-lu L., Ji B., Kang Y., Zhang H., Qin T., Chi J.: Cause analysis on drill pipe bending and fracture. Engineering Failure Analysis, 17, (2010), 1483÷1489.
Lu S., Feng Y., Luo F., Qin C., Wang X.: Failure analysis of IEU drill pipe wash out. International Journal of Fatigue, 27, (2005), 1360÷1365.
Murthy G.V.S., Das G., Das S.K., Parveen N., Singh S.R.: Hardbanding failure in a heavy weight drill pipe. Engineering Failure Analysis, 18, (2011), 1395÷1402.