GJCX-1 High-precision Tri-Component Borehole Magnetometer

Applications and Feature

• It is mainly used for borehole magnetic prospecting. It is applicable      for the measurements of horizontal components (X, Y) and vertical      component (Z) of the magnetic field in the borehole greater than φ46mm. In      addition, it is used as the high-precision teleclinometer without magnetic      hole or away from the magnetic well.

It can solve the following problems

1.     Validate the ground magnetic anomaly and judge the anomaly nature

2.     Coordinate the ground magnetic survey for 3D interpretation.

3.     Measure the deflection direction and dip angle in a high precision manner.

4.     Direct the drilling layout and well drilling.

5.     Confirm the depth and direction of blind ore.

6.     Confirm the discovery orebody position, extension, range and thickness.

7.     Confirm the occurrence of orebody.

8.     Search the associated deposit of attractive mineral.

Main Technical Specifications

• Measuring range: -99999nT~+99999nT

• Difference of readings at the opposite orientation of X, Y magneto      sensitive element ≤100nT

• Difference of readings at the opposite orientation of Z magneto      sensitive element ≤50nT

• Measuring range of dip angle: 0~45°, error<0.1°

• Measuring range of azimuth: 0~360°, error<2° (dip angle≥1°)

• Linearity≤2‰

• Measuring mode: Point measurement (frequency: Once/75s )

• Serial port R232 transmission data

• Downhole instrument probe OD: φ42mm

• Measured well depth≤2000m

• Probe withstanding pressure≤200kg/cm2

• Instrument power supply: AC220V±10%, 50Hz±10%

• Operational environment: Temperature: -10°~70°, temperature: 90%      (40°C)

• Overall dimension of instrument: φ42×2600mm, weight: 10kg