Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Akira Otsuka0
Hitoshi Sugiyama0
Hitoshi Tashiro0
Jahir Pabon0
David Hoyle0
Date of Patent
February 26, 2008
Patent Application Number
10416264
Date Filed
November 16, 2000
Patent Citations Received
Patent Primary Examiner
Patent abstract
A formation logging tool having a substantially continuous central mandrel with regularly spaced mass blocks disposed thereon, at least some of the mass blocks carrying sensors such as receivers. By adopting this structure, the tool can be made to behave as a mass-spring structure and its flexural and extensional behaviour controlled such that its dispersion curve does not extend into the dispersion curve of the formation to be logged. The structure can be applied to the whole of the logging tool or just to the receiver section and/or any spacer section between the receiver and the transmitter section.
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