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Hardware

   

Der BOREHOLE SHUTTLE ist ein kabelloses, geophysikalisches Loggingsystem für stark abgelenkte und horizontale Explorationsbohrungen, das gemeinsam mit der RAG seit 1992 auf Seilkernbohranlagen zu einem sicheren und kostengünstigen Messverfahren entwickelt wurde.

Cable-less geophysical logging system for highly deflected and horizontal exploratory drillings. Developed jointly with Ruhrkohle AG with wire-line core drilling rigs to achieve a sophisticated and demonstrably reliable and cost-effective measuring system.

Technische Daten /Technical specifications:

Borehole-Shuttle
  Sensors:

Dip/Caliper: A 12 channel ultrasonic transducer head, working in impulse-echo method, senses the amplitude and traveltime of the acoustic beam, reflected from the borehole wall.
Inclination/Roll: Three-axis accelerometer sensors allow reading of the actual inclination, the roll position, and the movement of the sonde.
Gamma-Gamma-Density: A radioactive source emits gamma-rays into the formation. The receiver is located at 50 cm distance, 20'' Long Space Density, and senses the scattered gamma-rays.
Gamma: The gamma sensor is located in the upper part of the sonde. A NaJ-photocounting unit senses the naturally radioactivity of the formation.
Depth measurement: During logging a Drill-String-Recorder with attached rope-sensor is mounted at the derrick.

 

 
Technical Data:  
length mounted 5,34 m
length of sensor part 0,95 m
diameter 60 mm
weight 61 kg
temperature 70° C
pressure approx. 200 bar
mission time approx. 10 h
logging interval approx. 1200 m
logging speed recom. 200 m/h
inner core barrel type HQ, CHD101, SK4 ¼
  l
  further adaptations are possible

 

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