It measures:

l   Well Deviation

l   Position,

l   Gravity Tool Face,

l   Magnetism Tool Face,

l   Gravity Sum

l   Magnetic Field Sum,

l   Temperature

l   Natural Gamma

l   Directional Gamma (equipped with directional gamma probe)

Main Technical Parameters:

1.work environment parameters

Pulser: positive pulse, key type

Size of non-magnetic drill collar: 89mm～229mm(3.5*～9*)

Mud displacement: 10---55L/S

Mud density:1g/cm³～2.1g/cm³(7.5ppg～18ppg)

Sand content : <2%

Working temperature of instrument under the shaft:-30℃～+150℃

Diameter of instrument:Φ48mm andΦ38mm

Pressure resistance of instrument under the shaft: max 138MPa (20000PSI)

2.measurement accuracy and range of direction probe:

Measurement accuracy of well deviation: +0.1o  range: 0-180

Measurement accuracy of position: +1o  range: 0-360

Measurement accuracy of gravity tool face: +1o  range: 0-360

Measurement accuracy of magnetism tool face: +1o  range :0-360

3.measurement accuracy and range of gamma probe:

Measurement range: 0-1000API

Sensitivity: 2/API

Measurement accuracy: +2%

Resolution ratio:173mm(6.8")(thin well wall8"well,50%)

Vibration (3 axles):30g, 50-300Hz

Compact: 500g, 0.5mS axle Z

        1000g, 0.5mS axle X and Y

4.measurement accuracy and range of direction gamma probe:

Measurement range: 0-1500API

Sensitivity: 0.65CPS per API

Measurement accuracy: +2%

Resolution ratio of thin layer:8.8")(thin well wall8"well,50%)

Vibration (3 axles): 20g, 50-1500Hz