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A MEASUREMENT-WHILE-DRILLING ACOUSTIC SYSTEM EMPLOYING MULTIPLE, SEGMENTED TRANSMITTERS AND RECEIVERS
A MEASUREMENT-WHILE-DRILLING ACOUSTIC SYSTEM EMPLOYING MULTIPLE, SEGMENTED TRANSMITTERS AND RECEIVERS
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机译:一种采用多个分段发射器和接收器的全钻测量声学系统
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摘要
This invention is directed toward apparatus and methods for obtaining acoustic measurements or "logs" of earth formations penetrated by a borehole. More particularly, the invention is directed toward obtaining the acoustic measurements while the borehole is being drilled. The downhole apparatus comprises a plurality of segmented transmitters and receivers which allows the transmitted acoustic energy to be directionally focused at an angle ranging from essentially 0 degrees to essentially 180 degrees with respect to the axis of the borehole. Downhole computational means and methods are used to process the full acoustic wave forms recorded by a plurality of receivers. A two way communication system is also used in the preferred embodiment of the invention.
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