Micro-Resistivity Imaging Logging Tool (MRIT-0)

There are six respective independent mechanical pads in the Micro Resistivity Imaging Logging Tool and each pad has 25 measurement button electrodes.There are 150 corresponding resistivity curves acquired for imaging processing to obtain the formation of micro resistivity image. The improved pad design makes the image more clear and can be adapted to a higher mineralization degree of drilling fluid. The instrument

cancommunicate with surface system, the original 5700 surface system, Halliburton EXCELL 2000system.

Specification:

OD: 5in(12.7cm)

Borehole Diameter: 6.25in～21in (15.875 cm～53.34cm) Make-up Length: 24.18ft (7.37m)

Max. Temperature: 175℃ Max. Pressure:140MPa Logging Speed:

High rate 30ft/min (9.1m/min) image mode Low rate 20ft/min (6.1m/min) image mode

Sensor Type: Micro-resistivity button electrode Sample Rate: 120samples/ft (394samples/m) Data rate: 310byte/frame (low data rate)

456byte/frame(high data rate) Frame rate:20 frame/S

Micro-resistivity Range: 0.2 ohm-m～10,000 ohm-m

0<Rt/Rm<20,000

Vertical resolution: 90%:0.2in

Depth of investigation: No more than 12in, decided by formation structure

Caliper:(6arms) 6～21in, Resolution:0.1in, Accuracy:±0.1in