System and method for measuring the vibration of a structure
AssigneeBaker Hughes Incorporated
InventorsDaniel Boyd Cooper, Erik N. Lee
Life of this patent
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Abstract
A system and method for measuring the vibration of a structure of interest are disclosed. The disclosure provides an acoustic isolation structure to substantially reduce response to acoustic energy generated by external physical stimuli. The acoustic isolation structure is formed by placing a housing, such as an outer conduit, around an inner conduit, forming a gap between the housing and the inner conduit. The gap is then configured to serve as an acoustic isolation layer by either filling the gap with an acoustic isolation material or by substantially evacuating the gap and sealing the ends thereof.
Claims21
A distributed disturbance sensing system having an acoustic isolation structure, comprising:
- a sensing cable contained within an inner conduit, the inner conduit being contained within a housing, the housing and the inner conduit respectively arranged to maintain a gap between an inner surface of the housing and the outer surface of the inner conduit for a substantial length of the housing, the housing being coupled to a structure of interest;
- and
- an acoustic isolation material contained within the gap.
A system to measure the vibration of a downhole component of interest, comprising:
- an inner conduit housing a sensing cable;
- an outer conduit surrounding a length of the inner conduit, the outer conduit being coupled to a downhole component of interest;
- a plurality of caps connecting the outer conduit to the inner conduit;
- at least one elongated chamber enclosed between the outer surface of the inner conduit and the inner surface of the outer conduit, the ends of the chamber being bounded by two of the plurality of caps;
- the elongated chamber being configured to dampen acoustic vibrations.
A method for isolating a distributed acoustic sensing system from external vibration sources, comprising:
- arranging a sensing cable within an inner conduit,
- arranging the inner conduit within an outer conduit, the inner conduit and outer conduit being arranged to form a gap between an outer surface of the inner conduit and an inner surface of the outer conduit;
- and
- configuring the gap to serve as an acoustic isolation layer.
Dependencies are inferred from the claim text.