Device borehole autonomous LOTOS-MT
Appointment
The autonomous borehole device LOTOS-MT is designed for research in oil and gas wells during their operation or repair and can solve the following problems:
• measuring pressure and temperature along the wellbore; • determination of the position of coupling joints (for pipes of magnetic and “non-magnetic” metals) and perforation intervals.
Execution
A variant of the device with an extended temperature range is also possible for operation in an environment with a hydrogen sulfide content of up to 30%.
Principle of operation
Information is recorded in digital form in the internal memory of the device. As memory chips, flash memory is used , which allows you to save information when the power source is off. If it is necessary to control and record the speed of movement and the depth of the downhole tools, the ICG depth control module is used . Depth data is used to bind data . recorded by downhole tools to depth.
After the measurement process, the information is read into a computer for processing and analysis. Data can be displayed on a computer screen in digital and graphic form, printed on a printer or transferred to other data processing programs.
Specifications
|
Name |
Value |
|
The upper limit of the measuring range of excess pressure, MPa |
80 |
|
Limits of permissible relative error in measuring overpressure,% |
± 0.2 |
|
Pressure resolution,% of the upper limit of measuring overpressure, not worse |
0.0015 |
|
Maximum working temperature, ° С |
120 |
|
Temperature resolution, ° С, not worse |
0.005 |
|
Time constant of the temperature sensor in water, sec, no more |
3 |
|
Data logging period, ms |
500 |
|
Number of registration points, not less |
135135 |
|
Continuous recording time without reading memory, hours, not less |
18.7 |
|
Overall dimensions: |
|
|
Weight, kg, no more |
7 |
|
Maximum allowable concentration of H 2 S in a controlled environment,% |
thirty |
|
Distance to recording points : |
|