GEO-MCW (Multi-probe Self-contained Capacitance Water Hold-up)
Self-contained multi-probe capacitance water hold-up GEO-MCW
Purpose.
Self-contained multi-probe digital capacitance water hold-up is designed to study directional and horizontal wells to determine fluid composition in the wellbore for hydrodynamic and geophysical studies, drilling, and operating and injection wells. To determine the position of the tool in the well there is the sensor of deviation angle and the sensor of rotation the tool.
The tool produces measurements from sensors at a specified equal time intervals. Information is recording in digital form in the internal non-volatile memory of the tool. As memory chips flash-memory is used that allows to save the information when you turn off the power source. After the measurement process data is read into the computer for processing and analysis. You can save data to your PC and transfer to other programs for data processing. Settings and calibration coefficients are saved in the tool memory. The tool does not require erasing the memory before starting record. After filling all the memory, recording starts from the beginning – "in a circle" or stops, depending on mode selected (by defaults recording stops). Due to the low current consumption, GEO-MCW may be in working condition (without replacement power sources) for a long time.
There is a cable-self-contained version, which works in conjunction with tool GEO-7.
Parameter | Value |
---|---|
Capacitance water holdup channel (CWH) | |
The number of sensors | 6 |
Measuring range | from 0% to 60% of water content or from 0 units to 1units |
Relative / absolute error | 10% / ±0.1 unit |
Temperature channel (T) (technological) | |
Measuring range, °C | 0...+120 |
Number of bits of ADC | 10 |
Absolute error, °C | ±3 |
Time constant in liquid, min, not more | 3 |
Deviation channel | |
Indication range | from 0° to 180о |
Absolute error | ±3° |
Rotation channel | |
Indication range from CWH #1 sensor position | from 0 to 360о |
Absolute error in position of the deviation angle 10°-170° | ±5° |
The limiting operational parameters | |
Pressure range, kgf/sq.cm | 0...600 |
Temperature range, °C | 0...120 |
Tool memory | |
Amount of memory of the tool | to 8 650 752 bytes or 2 162 688 measuring points |
Filling memory time | from 1.25 day (time cycle 0.25 sec) to 3 128 days (time cycle 125 sec) |
The time of storage of information | 10 years |
Number of write cycles in the internal memory | 10000 |
Time parameters | |
Time cycle, sec | 0.25-125 |
Delay time of writing of the tool, min | 0-65000 |
Stabilization time of operating mode after power-up, min. | 1 |
The error of the internal clock per day, sec, not more than | +5 |
Power supply | |
Power source | Battery 3.6V diameter 14mm length 50mm |
The minimum voltage, which preserves the metrological characteristics of the tool, V | 3,3 |
The current consumption in the storage mode, mkA, not more | 50 |
Average consumption current in operating mode depends on the time cycle | 1sec – 2.65mA |
Software | |
Turn on/off the record mode (with delay) of the tool via PC | |
View the real values of CWH, angles, voltage of power supply to test tool | |
Set the time cycle from 0.25 sec to 125 sec, programming the mode of operation of the tool | |
Display information with measurement data from the tool to a computer in any interval of work | |
View data on the computer and output the data obtained in the selected range to the printer in numerical and graphic form | |
Communication with PC | USB2.0 |
The reliability of the tool | |
The average time between failures, h, not less | 20000 |
The average restoration time, h, not more | 4 |
Average lifetime, years | 5 |
Size | |
Dimensions (when closed), not more | 42х980mm |
Weight, kg, not more than | 5.2 |
Model | Diameter, mm | Pressure, MPa | Temperature, °C | Description |
---|---|---|---|---|
GEO-MVA-42 MPa/°С | 42 | 60, 80 | 100, 120 | Channels: 6 CWH |
GEO-MVU-42 MPa/°С | 42 | 60, 80 | 100, 120 | Channels: 6 CWH, opening sensor |
GEO-MVA2-42 MPa/°С | 42 | 60, 80 | 100, 120 | Channels: 6 CWH, opening sensor, cable mode |