1. CG gyro main features:

l         Automatically north finding.

l         High measurement accuracy, both the slim and large inclination are guaranteed.

l         Continuous measurement, dynamical real time recording.

l         Fast measurement speed, reach to 5000m/hr or more.

l         Shock resistance, vibration, high reliability.

l         Simple, easy to use, save time

l         Chinese /English software interface, completely recording.

l         Automatic drift correction

Application:

2      Old wellbore trajectory retest, new well wellbore trajectory measurement.

2      Directional well, Cluster wells toolface orientation.

2      Casing window whipstock orientation.

2      Offshore platforms cluster wells measurement and orientation.

2. Main performance and specifications:

Model: ER-01A

1. Parameters can be measured:

Inclination, azimuth, high side toolface, north direction toolface,

and probe temperature.

2. Measurement accuracy(1σ):

Azimuth: 0~360 deg, error: ≤0.5 deg

Inclination: 0~70deg, error: ≤0.1deg

Gravity toolface: 0~360deg, error: ≤1.5 deg

North direction toolface: 0~360deg, error: ≤0.5deg

3． Environment condition:

Operating temperature:‐20℃～175℃(with thermal sleeve)

Pressure: 100Mpa

Shock: 700g, 0.5ms, ?sine

4． Outside dimension:

Downhole probe outside dimension: 48mm,

Downhole probe length: 1120mm,

Total length of downhole tools: 4550mm,

Centralizer length 566mm,

Extra heavy bar length: 1000mm,

Standard R-type single-point guide shoe or standard E-type guide shoe.

5．Test software:

V2.0.0.1 Gyro inclinometer dedicated software.

6．Measuring method:

Trajectory measurements: continuous,

Measurement speed: < 5000 m/h

7． Ground host:

Gyro dedicated host.

Model: ER-01C

1. Parameters can be measured:

Inclination, azimuth, high side toolface, north direction toolface,

and probe temperature.

2. Measurement accuracy(1σ):

Azimuth: 0~360 deg, error: ≤0.5 deg

Inclination: 0~70deg, error: ≤0.1deg

Gravity toolface: 0~360deg, error: ≤1.5 deg

North direction toolface: 0~360deg, error: ≤0.5deg

3． Environment condition:

Operating temperature:‐20℃～90℃

Pressure: 80 Mpa

Shock: 700g, 0.5ms, ?sine

4． Outside dimension:

Downhole probe outside dimension: 45mm,

Downhole probe length: 1120mm,

Total length of downhole tools: 4550mm,

Centralizer length 566mm,

Extra heavy bar length: 1000mm,

Standard R-type single-point guide shoe or standard E-type guide shoe.

5．Test software:

V2.0.0.1 Gyro inclinometer dedicated software.

6．Measuring method:

Trajectory measurements: continuous,

Measurement speed: < 5000 m/h

7． Ground host:

Gyro dedicated host.