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;
– mandrel sub MK150×6×1:8-3-147 .

Surface receiving and processing complex includes:
– software;
– a device of conjugation with the object (USO);
– notebook computer;
– connection cables on coil (antenna, ground);
– remote driller’s panel.

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

Communication channel action distance in sections, m:

with specific resistance 20…400 Ohm•m

with specific resistance 0,5…20 Ohm•m

 

5000

3200

Flow-in, at which system serviceability remains, l/s

15-72

Maximum operating temperature, °С

120

Maximum operating pressure, MPa

60

Vibration limiting level, at which telemetry system saves serviceability, m/s2

200 (~20 g)

Maximum curvature intension, skidding/rotation, degree/10 m

5/2

Specifications

Dimensions, mm:

diameter      

length

 

178

10 000

Conjunctive tool-joint thread      

З-147

Weight, kg    

up to 450

 

Parameter

Range

Accuracy

Frequency

Resolution

Renovation time

Type of data

Azimuth

0÷360°

±1.5°

±1.5°

72 sec at 5 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°

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

Monitored

Magnetic whipstock

0÷360°

±1.0°

±1.0°

1.4°

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

Monitored

Label azimuth (whipstock) till 3° zenith angle

 

0÷360°

 

±1.5°

 

±1.5°

 

1.4°

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

Monitored

Magnetic field, uT

0÷200°

±0.15°

±0.15°

0.01

72 sec at 5 Hz transfer frequency

Monitored

Temperature

0÷100°C

±2.0°C

±2.0°C

1.4°C

Raw

Vibration, g

0÷55 g

±1 g

±1 g

1.4 g

Raw

 

Transfer frequency, Hz

1.25; 2.5; 5; 10

 

 

 

 

 

Certificate

ZTM-172 telemetry system has a certificate of conformance.