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US 5,155,922 AGranted
Depth measuring device with wear resistant guide means
AssigneeSchlumberger Technology Corporation
InventorNeal S. Cooper
Life of this patent
Estimating the term…
Abstract
A cable length measuring device, comprises guide rollers for maintaining the cable in a straight line along a given segment of a line, and two encoding wheels disposed tangentially to the straight segment cable; additional guides, the ends of which bearing against the cable are made of a wear resistant material, are provided between the guide rollers and the tangential wheel/cable contact area.
Claims12
A cable length measuring device, comprising:
- first guide means for maintaining the cable in a straight line along a given segment of a line;
- at least one encoding wheel disposed tangentially to the straight segment cable;
- second guide means disposed between said first guide means and the tangential point of contact, and being made, at least its end bearing against the cable, of a wear resistant material, said second guide means including at least one arm provided, at its end bearing against the cable, with an insert made of said wear resistant material;
- sensors for detecting the revolution of the encoding wheel;
- and
- means for counting the number of wheel revolutions and converting the revolutions into cable length.
3 more elements
A device for measuring the depth of a logging sonde lowered in a borehole traversing an earth formation through a cable wound on a winch, comprising:
- first guide means for maintaining the cable in a straight line along a given segment of a line;
- at least one encoding wheel disposed tangentially to the straight segment cable;
- second guide means disposed between said first guide means and the tangential point of contact, and being made, at least in its end bearing against the cable, of a wear resistant material, said second guide means including at least one arm provided, at its end bearing against the cable, with an insert made of said wear resistant material;
- sensors for detecting the revolution of the wheel;
- and
- means for counting the number of wheel revolutions and for converting the revolutions into a depth value of the logging sonde in the borehole.
3 more elements
Dependencies are inferred from the claim text.