ClampOn DSP Well Collision Detector
12. March 2010
ClampOn introduces the DSP Well Collision Detector which is designed to prevent collisions involving sidetrack drilling within the proximity of existing wells.
ClampOn DSP Well Collision Detectors provide operators with real time data so
that collision risk analysis calculations are not the only factor determining
the bit’s proximity to existing wells.
This method uses ClampOn non-invasive ultrasonic sensor technology in the form
of a spectrum analyzer. The spectrum analyzer digitizes the ultrasound allowing
for frequency analysis in real-time.
The procedure is patent pending. ClampOn’s experience with this procedure began
at the request of a major operator in the Gulf of Mexico. The operator was involved
in a side track drilling operation which would require the bit to travel in close
proximity to existing wells. The operator believed topside sensors could possibly
detect the ultrasonic signal generated by the drill string and thus help to divert
a possible collision with an existing well. Previous experience proved that ClampOn
topside sensors could detect down hole events. One example would be ClampOn DSP
sensors detecting perforation guns firing at depths of 13,000 to 15,000 feet.
The process involves ClampOn DSP Well Collision Detectors being installed topside
on all existing wells in close proximity to the well being drilled. The drill
string’s approach to existing wells will create an increase in the ultrasonic
signal being observed topside. When dramatic ultrasonic increases are observed,
drilling will be halted and data analyzed. After analysis is complete, the drill
string can be diverted or drilling can resume with the confidence that a collision
has been avoided or that initial calculations were confirmed.
The use of sidetrack drilling is only going to increase as fields mature. Proper
collision avoidance techniques should be considered when preparing for the drilling
operation. The ClampOn DSP Well Collision Detector provides the operator with
an advanced real time collision monitoring system with minimal equipment and personnel
requirements.
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