Owner Baker Hughes Incorporated

Inventors Aronstam, Peter S.

Agent Freehills

Pub. Number AU-B-2003279893

PCT Number PCT/US2003/0205

PCT Pub. Number WO2004/003342

Priority 60/392,697 27.06.02 US

Filing date 25 June 2003

Wipo publication date 19 January 2004

Acceptance publication date 12 June 2008

E21B 47/12 (2006.01) Survey of boreholes or wells - Means for transmitting measuring-signals from the well to the surface, e.g. for logging while drilling

G01D 5/26 (2006.01) Mechanical means for transferring the output of a sensing member - using optical means, i.e. using infra-red, visible or ultra-violet light

G01D 5/353 (2006.01) Mechanical means for transferring the output of a sensing member

G02B 6/44 (2006.01) Light guides - Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables

H01S 3/067 (2006.01) Lasers, i.e. devices for generation, amplification, modulation, demodulation, or frequency-changing, using stimulated emission, of infra-red, visible, or ultra-violet waves

H01S 3/094 (2006.01) Lasers, i.e. devices for generation, amplification, modulation, demodulation, or frequency-changing, using stimulated emission, of infra-red, visible, or ultra-violet waves - by coherent light