Triple Combo LWD (2ННК-ГГКЛП-LWD-121)
Triple Combo LWD is specially designed to provide fully compensated azimuthal readings of neutron porosity, compensated density and effective atomic number, Pe and borehole caliper image.
Tool applications:
- borehole design control during drilling;
- registration of images of density, hydrogen content and natural gamma activity in 16 sectors;
- borehole profile registration according to density and acoustic caliper data;
- routing drilling in the reservoir thanks to azimuth measurements;
- allocation of collectors;
- determining the nature of reservoir saturation;
- determination of technological parameters of drilling (pipe and annular pressure, annular temperature).
The device can operate both from its own and from external power sources.
Compensated neutron-neutron logging measuring device contains a chamber for placement of an ampoule source of fast neutrons IBN-8-5, a measuring unit lithology-density logging contains a camera for placement of a Cs-137 gamma radiation source type IGI-Ts-4.
The neutron source is recoverable.
| Measured parameters | Range | Accuracy (relative) | Statistical accuracy** |
| Water-saturated porosity (2NNA each), % | 0÷60 | 4.2+2.3(40/Кп-1), % | ±5 % relative error |
| Density, g/cm3 | 1.5÷2.0 2.0÷3.0 |
±1.5% ±1.2% |
±1.0% |
| Photoelectric Absorption Index (Pe), b/e− | 1.0÷2.5 2.5÷7.0 |
± 0.2 b/e− |
± 0.15 b/e− |
| Distance from the outer surface of the 2GGK probe to the borehole wall*, mm |
|
± 3 mm |
± 1.5 mm |
| Distance from the outer surface of the acoustic caliper sensor to the borehole wall*, mm | 0÷100 σпж=1.0 g/сm3 0÷70 σпж=1.2 g/сm3 0÷30 σпж=1.6 g/сm3 |
±2,5 mm | - |
| Annular and pipe pressure, МPа | 0÷140 | ±2.5% | |
| Annular temperature, °С | 0÷140 | ±2.5% | |
| Vertical resolution | 35 сm (10 in) GGK 50 сm (20 in)(2NNA each) |
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*During rotary drilling, the azimuthal distribution of the recorded data is carried out over 16 sectors
**at a speed of 20 m/h (65 ft/hr)
| Общие технические данные | |||
| Length, mm | 3330 (121.3”) | no more | |
| Body Diameter, mm | 121 (4.75”) | no more | |
| Maximum Stabiliser Diameter, mm | 137, 144, 156 | ||
| Hole Size | 142÷168 (5.59” to 6.61”) |
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| Total Weight, kg | 270 kg (595 lbs) | no more | |
| Operating Temperature Range:°С: when working in the well
|
10 to 150°С (50 to 302°F) 45 to 60°С (-49 to 140°F) |
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| Maximum pressure, МPа | 137 | ||
| Ultimate load: Make up torque Permissible tensile force Permissible compressive force |
20 kNm (14.7 kft·lbs) 1000 N (225 klbs) |
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| Max. bending moment | when sliding | 15 kN m (11 kft·lbs) |
|
| during rotation | 9 kN·m (6.6 kft·lbs) |
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| Maximum Dogleg Severity (rotating)\(sliding) | when sliding | 10°/10 m (30.5°/100ft) |
|
| during rotation | 5°/10 m (15°/100ft) |
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| Battery life | 240 h | not less | |
| Vibration resistance in the range 10÷60 Hz | 20 g | ||
| Max Shock | 50 g | ||
| Max Flowrate | 24 l/s (380 gpm) | not less | |
| Connections | (NC38/ NC38) | ||
| The moment of fastening of the locking thread | 11.2÷13.4 кН×m | ||
