Fiber Optic Cameras

Fiber optic cameras operate from a 7/32" cable containing both electrical conductors (for power and telemetry) and optical fiber (to carry a full-frame rate video signal). At the surface, video is typically captured, compressed as H.264, and stored to a hard drive. It may be annotated with time, depth, and other information. Finally, it is published to external hard drive, flash drive, or DVD.

Images sent over fiber optic cable are pristine, but come at the cost of requiring a dedicated fiber cable drum. For some surveys, in particular fluid entry, fiber can help to see what other technologies might miss. It can prove a cost-effective option for lengthy surveys, as well.

Downhole Vision's Fiber Down-View system has the following specifications:

Outer diameter:1-11/16" (43mm)
Length:99" (251cm) with inline centralizer
61.5" (156cm) without inline centralizer
Max temperature:257°F (125°C)
Max pressure:10,000psi (69MPa)
Tool string weight:31lbs (14kg) with centralizer
Frame rate:30fps NTSC / 25fps PAL

Other configurations include:

  • Side-view
  • High pressure (15kpsi with 1.75" OD)