is designed for directional and horizontal trajectory monitoring and operative controlling while drilling using a wireless electromagnetic communication channel.
Azimut-4-108 telemetry system composition
Azimut-4-108 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 visualization; measured by telemetry system;
– connection cables on coil (antenna, ground);
– driller pendant;
– notebook computer with software parameter collection, processing and visualization; 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 while turbo and rotation 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 specofoc resistance 0,5÷20 Ohm·m |
3000 2000 |
|
Flow-in, at which system serviceability remains, l/s |
9…15 |
|
Maximum operating temperature, ºC |
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 |
|
Dimensions, mm: |
108 |
| Conjunctive tool-joint thread | 3-88 |
| Weigth, kg | up to 250 |
|
Parameter |
Range |
Accuracy |
Frequency |
Resolution |
Renovation time |
Type of data |
|
Azimuth |
0÷360° |
±2.0° |
±2.0° |
1° |
72 sec at 5 Hz of of transfer frequency |
Monitored and raw |
|
Zenith angle |
0÷100° |
±2.0° |
±2.0° |
0.1° |
Monitored |
|
|
Gravitational whipstock |
0÷360° |
±0.5° |
±0.5° |
1.4° |
72 sec at 5 Hz transfer frequency (4 times in 1 transfer) |
Monitored |
|
Magnetic whipstock |
0÷360° |
±2.0° |
±2.0° |
1.4° |
9 sec at 5 Hz transfer frequency (4+4 times in 1 transfer) |
Monitored |
|
Label azimuth (whipstock) till 3° zenith angle |
0÷360° |
±3.0° |
±3.0° |
1.4° |
18 sec at 5 Hz transfer frequency (4 times in 1 transfer) |
Monitored |
|
Magnetic field |
0÷200°mT |
±0.15° mT |
±0.15°mT |
0.01 mT |
72 sec at 5 Hz transfer frequency |
Monitored |
|
Temperature, C° |
0÷100 ºC |
±2.0° |
±2.0° |
1.4 ºC |
Raw |
|
|
Vibration, g |
0÷55 g |
±1 g |
±1 g |
1.4 g |
Raw |
|
|
Transfer frequency, Hz |
2.5; 5; 10 |
|
|
|
|
|
Certificate of type approval of measuring tool, reg. No. 60483-15 GOST-R certificate.