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- W2377939667 abstract "The acoustic logging while drilling (LWD)technology has undergone a rapid development in recent years.A key technology of the LWD acoustic measurement is the design of an acoustic isolator to suppress acoustic propagation along the drill pipe,such that the acoustic signals from formation can be effectively measured under the LWD conditions.In order to optimize the groove technique commonly used for the LWD isolator design,we apply a 3D finite-difference elastic-wave modeling technique to simulate and analyse the acoustic response of a drill pipe before and after cutting grooves.Analyses of the simulation results reveal the relationship between in the collar s stopband characteristics (suches as center frequency and width)and collar size,and that between collar wave attenuation and the width and depth of grooves.Based on the results,a new-type LWD acoustic isolator structure is designed,and the theoretical acoustic attenuation curve and the borehole response characteristics for typical soft and hard formation conditions are obtained.The field experiment well test results indicate that an LWD acoustic tool with the new-type acoustic isolator can suppress the interfere of collar wave and measure a high quality formation compressional-wave data and slowness." @default.
- W2377939667 created "2016-06-24" @default.
- W2377939667 creator A5008135736 @default.
- W2377939667 date "2011-01-01" @default.
- W2377939667 modified "2023-09-26" @default.
- W2377939667 title "LWD acoustic color mode wave attenuation character research and isolator design" @default.
- W2377939667 hasPublicationYear "2011" @default.
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