发明名称 |
Transducer for sonic logging-while-drilling |
摘要 |
<p>An acoustic wave transducer useful in sonic logging while drilling a borehole includes an array of transducer elements mounted circumferentially around a drill collar. The elements are bonded in an elastomer ring that is received in an external groove in the collar and are protected by a shield having windows. The elements are electrically connected in parallel so that when excited by an electrical pulse, the elements generate a monopole acoustic wave that propagates out into the formation. When used as a receiver, the elements detect averaged acoustic waves from the formation around the circumference of the collar and have minimum sensitivity to multipole waves traveling through the drill collar. <IMAGE></p> |
申请公布号 |
AU721408(B2) |
申请公布日期 |
2000.07.06 |
申请号 |
AU19960074107 |
申请日期 |
1996.12.03 |
申请人 |
ANADRILL INTERNATIONAL, S.A. |
发明人 |
JEFFREY B ARON;SHU-KONG CHANG;DONALD A KLASEL;TING M LAU |
分类号 |
E21B47/01;G01V1/52;(IPC1-7):H04R1/26;E21B47/16;G01V1/40;E21B47/14 |
主分类号 |
E21B47/01 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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