is designed for directional and horizontal trajectory monitoring and operative controlling while drilling using a wireless electromagnetic communication channel.

Description

ZTM-172 telemetry system consists of the downhole tool and surface receiving and processing complex.

Downhole tool includes:

– electrical separator;

– nonmagnetic extender;

– electronic block with directional sensor;

– turbogenerator.

Surface receiving and processing complex includes:

– software;

– a device of conjugation with the object (USO);

– notebook computer with software parameter collection, processing and vizualization; measured by telemetry system;

– connection cables on coil (antenna, ground);

– driller pendant;

– notebook computer with software parameter collection, processing and vizualization; displayed on driller pendant.

Features and Advantages

  • the possibility of whipstock orientation within the borehole vertical portions;
  • the possibility of operation in conductor while cement stone and circulation check valve drilling;
  • keeps the set trajectory without drilling process interruption;
  • automatic compensation of artificial magnetic fields influence;
  • the possibility of azimuth and zenith measurement authenticity control;
  • complete sets supply to provide regular operation under rig conditions;
  • continuous directional parameters measuring and recording in real-time;
  • check measurement performance in statics;
  • telemetry system signal transfer frequency switch from surface;
  • two methods of whipstock angle setting measurement – gravitational and magnetic;
  • the possibility of GR modul use;
  • the use during downhole turbine motor and rotary drilling;
  • directional parameters mapping on driller pendant, and also main technological drilling parameters measurement and imaging (depth, moment on driving tool, mud pressure);
  • cooperation with GEOSENSOR drilling parameters control station.

Exploitation limiting conditions

Specifications

Parameter

Range

Accuracy

Frequency

Resolution

Renovation time

Type of data

Azimuth

0÷360°

±1.5°

±1.5°

36 sec at 10 Hz of transfer  frequency

Monitored and raw

Zenith angle

0÷100°

±0.15°

±0.15°

0.1°

Monitored

Gravitational whipstock

0÷360°

±0.5°

±0.5°

1.4°

36 sec at 5 Hz transfer frequency (4 times in 1 transfer)

Monitored

Magnetic whipstock

0÷360°

±1.0°

±1.0°

1.4°

4 sec at 10 Hz transfer frequency (4 times in 1 transfer)

Monitored

Label azimuth (whipstock) till 3° zenith angle

0÷360°

 

±1.5°

 

±1.5°

 

1.4°

4 sec at 5 Hz transfer frequency (4 times in 1 transfer)

Monitored

Magnetic field, uT

0÷200°

±0.15°

±0.15°

0.01

 

 

36 sec at 10 Hz transfer frequency

Monitored

Temperature, C°

0÷100°

±2.0°

±2.0°

1.4

Raw

Vibration, g

0÷55

±1°

±1°

1.4

Raw

 

Transfer frequency, Hz

2.5; 5; 10

 

 

 

 

 

Certificate

ZTM-172 telemetry system has a certificate of conformance.