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Drilling, perforating and formation analysis

  • US 7,938,175 B2
  • Filed: 01/26/2009
  • Issued: 05/10/2011
  • Est. Priority Date: 11/12/2004
  • Status: Active Grant
First Claim
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1. A system for use in transmitting light in a well bore, comprising:

  • a seal adapted to substantially seal circumferentially around the well bore, and when substantially sealing, define an end of an isolated zone of the well bore;

    a fluid light path comprising a fluid supplied into the isolated zone, the fluid adapted to displace less optically transmissive fluid residing in the well bore; and

    at least one of a laser device adapted to output a laser beam at least partially overlapping the fluid light path or an emitted light receiver adapted to receive light emitted by a heated material at least partially through the fluid light path.

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