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BOTTOM-HOLE TELEMETRIC SYSTEM (BTS) ATLAS

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Telemetry, Electronics
BOTTOM-HOLE TELEMETRIC SYSTEM (BTS) ATLAS
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Telemetry, Electronics
BOTTOM-HOLE TELEMETRIC SYSTEM (BTS) ATLAS
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Purpose
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Characteristics
The bottom-hole telemetric system (BTS) produced by Neft-Servis LLC has a hydraulic communication channel and is designed to promptly control the trajectory of drilling vertical, deviated and horizontal wells and provide side-tracking by continuous measurement of the whipstock orientation angle, azimuth, slope angle and the natural gamma radiation of the surrounding rock.

No.

Name

Qty.

Submersible part

1

Upper sub, top: coupling Z-86, bottom: nipple 2 7/8, AOТ*

1

2

Circulating pulsator sub 3.5” (90mm), top: coupling 2 7/8 AON, bottom: nipple Z-73*

1

3

Pulsator*

1

4

Battery power unit

4

5

Drift indicator unit

2

6

Gamma ray logging unit

2

7

Tandem

1

8

Non-magnetic drill pipe 3.5” (90mm)*

1

9

Centralizer*

18

10

Centralizer screw

18

11

Medium sub, top: nipple Z-73, bottom: nipple Z-73*

1

Surface part

12

Driller's display

1

13

Cutout box

1

14

Barrier-interface unit

1

15

Uninterruptible power supply unit

1

16

Automated work station of telemetry engineer

2

17

Maintenance unit kit

Set of sensors:

18

Pressure sensor

1

19

Casing weight sensor

1

20

Depth sensor

1

Cable set:

21

Trunk cable 1

1

22

Trunk cable 2

1

23

Power cable of driller's display

1

24

Universal cable

4

Parameter

Value

Surface part (explosion hazard zone)

Operating temperature range, °C

from minus 40 to plus 60

Protection index of the components covering, dust and water resistance

IP66

Explosion protection class as per ATEX: driller's display

EX ia IIC T4

depth sensor

EX ia IIC T4 Ga

casing weight sensor

EX ia IIC T4

pressure sensor

EX ia IIC T4

cutout box

EX ia IIC T4

Surface part (safe zone)

Operating temperature range, °C

from 10 to 60

Relative humidity (at 25±5 °C)

up to 90%

Submersible part assembled

DC power supply range, V

from +22 to +37

Outer diameter (OD), mm

90±0.87

Length including subs, mm

12470+10

Upper connection*

Coupling Z-86

Lower connection*

Nipple Z-73

Mud flow rate, l/s*

10±2

Slope angle rate*

30°/100m

Maximum operating temperature, °C

125

Maximum working pressure, bar

1300

Maximum steady-state axial and transverse vibrations, g

5

Blow: shock pulse value, g, not more than shock pulse time, sec, not more than

45 0.025

Power consumption, mA×h, not more than

Supply voltage 31V at temperature up to 50°C. If the temperature increases, energy consumption may increase by 10%

Inclinometry unit: power saving mode transfer rate 0.9 bit/sec transfer rate 1.5 bit/sec

25

70

70

Gamma ray logging unit: power saving mode transfer rate 0.9 bit/sec transfer rate 1.5 bit/sec

70

70

70

Pulsator: power saving mode transfer rate 0.9 bit/sec transfer rate 1.5 bit/sec

15

235

400

General: power saving mode

110

375

540

Inclinometry unit

Measuring range

Resolution

Accuracy of measuring

Slope angle, °

0 to 180

0.1

±0.2

Azimuth,° measuring angle from 3 to 5 measuring angle from 5 to 10 measuring angle from 10 to 170

0 to 360

0.35

± 2.5,

± 1.5,

± 1.0,

Whipstock orientation angle, gravity, °

0 to 360

1.4

± 1.5

Whipstock orientation angle, magnetic, °

0 to 360

1.4

± 1.5

Temperature, °C

from 0 to 125

2

± 3.0

Magnetic field intensity, nT

from 0 to 70,000

100

± 200

Gamma ray logging unit

Measuring range of gamma radiation, API

from 0 to 200 ± 3%

Statistical repeatability, API

± 3

Vertical resolution, m

0.15

* - The parameters are specified for 90mm diameter.