Drilling string vibration online monitoring and its application

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Journal of Vibration and Shock ›› 2013, Vol. 32 ›› Issue (1) : 60-68.

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Drilling string vibration online monitoring and its application

Liu Ruiwen，Guan Zhichuan , Li Chunshan

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Abstract

Drilling string vibration is a kind of very complex vibration waves, which contains the vibration caused by drilling string and bit working condition, the vibration stimulated by the interaction of bit and the formation, the vibration caused by collision and stick-slip between drilling string and the borehole wall. Study shown that the moving status of drilling string, bit wear conditions and the rock breaking type will caused different characteristic vibration signals. Therefore, to monitoring and analyze drilling string vibration time-frequency characters online, can identify the status of downhole tools and prevent the premature failures and drilling accidents.
Based on the studies of drilling string vibration test methods in and abroad, drilling string triaxial vibration monitoring device on surface was designed and fields tested. Fields tests shown the drilling string abnormal working status, stick pipe and bit faults can be recognized by online analysis of vibration signals. The server vibration caused by incorrect drilling parameters can be prevented by changing weight on bit or rotary speed and the premature failures of drilling tools can be prevented.

Key words

Drilling string vibration / Accelerator / Vibration monitor / Drilling tool failure

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Liu Ruiwen;Guan Zhichuan;Li Chunshan. Drilling string vibration online monitoring and its application[J]. Journal of Vibration and Shock, 2013, 32(1): 60-68