01 / 02A K341 expansion packer developed for staged fracturing and sand-control strings. A check mechanism retains setting pressure, while a balanced emergency reverse-circulation valve provides a contingency flow path before retrieval.
| Bearing Pressure (MPa) | Reverse Flushing Pressure (MPa) | Releasing Force (T) | Setting Pressure (MPa) | Outer Diameter (mm) | Inner Diameter (mm) | Temperature Resistance (°C) | Tensile Resistance of Tools (T) |
|---|---|---|---|---|---|---|---|
| 70 | 4 | 12 | 20-70 | 100–220 | 45-120 | 120-210 | 60 |
The supplied structure diagram identifies the upper connector, one-way valve, rubber sleeve, lower joint, balance valve and reverse-wash valve.
Used in staged fracturing and sand-control strings where loss of expansion pressure or emergency circulation must be controlled.
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