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Measurement
Capabilities: Instrument reads
inclination and tool-facing (rotational attitude in hole, also called
roll) to ± 0.5º without restriction. Inclination accuracy under
working conditions is dependent on the precision of alignment in the
hole and only reaches instrument accuracy when the survey train is
precisely centralized. Standard survey procedures normally limit
accuracies to the range ± 0.75º to ± 1.0º irrespective of instrument
accuracy. Tool facing can be determined in holes inclined 1º or more
from vertical.
Construction:
Stainless Steel outer container with no need for user access into the e-SYNC
because normal start/instruction and data communication is accomplished
by Bluetooth wireless communication with a palm type device. The removal
of a pressure proof protective cover provides access to a wired communication socket and battery charging connection.
Size:
Outside diameter 35.56 mm (1.40
inches), length 30 to 50 cm dependent on sensor configuration. Maximum
weight 3.4 kg (7.5 lb).
Application
Examples:
a) The e-SYNC
attached to a standard overshot for bore-hole inclination readings every
time the wireline core-barrel assembly is retrieved.
b) Attached to a
clay-impression dropper, the e-SYNC
can provide core orientation in any hole with inclination > 1º from
vertical. The e-SYNC can do the same job with any in-hole tool such as a camera
for used for peripheral scans or core stub photos in core orientation.
This application category involves the attachment
of the e-SYNC to the in-hole
tool.
c) Paired with a mule
shoe socket installed in the rod train in a known (rotational)
orientation above an in-hole tool, the e-SYNC
attached to a mule shoe dropper
can determine the facing direction of the in-hole tool relative to the
vertical. If changes in the facing-direction need to be made, the rods
are rotated through the required angle. A check of the accuracy of the
rod rotation can be made by another e-SYNC
survey. This application is used in wedging operations, directional
drilling, and in strain and stress gauge placements amongst others.
Sensors:
All the sensors are solid state controlled by an internal CPU.
Pressure
and Temperature Limits: 85º C
and 30,000 kPa (4300 psi)
Battery
Life: Fully
charged batteries provide power for 18 hours. Low battery condition on
hand-held device notifies user to recharge batteries.
Information
Required from Potential User:
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