is designed to control technical condition of tubing, casing pipes and downhole filters by a complex of methods including defectoscope and thickness measuring tool, highly sensitive thermometer, gamma-ray logging, pressure sensor and recording measurement results in non-volatile memory.
In most drilling wells MID-A is used to control:
- well construction having till 4 casings;
- compliance to casing interval project with different diameter and wall thickness;
- tail liner installation interval;
- casing integrity and rate of wear during tool operation.
In the running wells MID-K-GK allows to define:
- perforation intervals;
- cut through failure position;
- casing blowout in double casing string well program;
- factual installation intervals of sealing patch;
- factual installation depth of casing packer and etc.;
- well construction till 4 casings;
- corrosion intervals and casing rate of wear;
- casing failure intervals, requiring repair;
- first, second and third casing thickness.
|
Pipe maximum diameter, mm |
324 |
|
A single-pipe wall thickness measurement error, mm: for single pipes 2.5” for single pipes 5” |
±0.4 ±0.5 |
|
Through-tubing casing 5″ wall thickness measurement error, mm |
±0.7 |
|
Minimum length of a “crack”-type detectable defect along the pipe axis, mm: for single pipes 2.5″ for single pipes 5″ for casing pipes 5″ through-tubing measurement |
30 50 70 |
|
Minimum length of a “transversal crack”-type detectable defect |
1/6 of the perimeter |
|
Thermometer resolution, °С |
0.01 |
|
Thermometer time constant, sec |
0.5 |
|
Maximum operating temperature, °С |
120, 150 |
|
Maximum operating pressure, MPa |
100 (110) |
|
Downhole dimensions, mm: diameter |
42 |
|
Run time, h |
no less 30 |