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Model DCFZ-A hydraulic stage tool is a special tool used to complete the cementing operation in two times. Mainly used in the following circumstances,
1.1. Excessive injection of cement at one shot.
1.2. The formation cannot bear the gigantic fluid pressure.
1.3. Packoff special strata.
1.4. Avoid the occurrence of annual air channeling after the cementing job.
1.5. The considerable temperature difference between the upper and lower section makes it rather difficult to adjust the slurry performance.
1.6. Two-stage cementing for deviated and horizontal wells
1.1. Excessive injection of cement at one shot.
1.2. The formation cannot bear the gigantic fluid pressure.
1.3. Packoff special strata.
1.4. Avoid the occurrence of annual air channeling after the cementing job.
1.5. The considerable temperature difference between the upper and lower section makes it rather difficult to adjust the slurry performance.
1.6. Two-stage cementing for deviated and horizontal wells
| Specification (in) | 95/8²(Φ244.5) |
| Opening Pressure (MPa) | 14~16 |
| Closing Pressure (MPa) | 5 |
| Sealing Capacity (MPa) | 25 |
| Rated Load (t) | 238 |
| Connection thread | API 9 5/8² BTC |
| Max. OD. (mm) )) |
282.5 |
| Drill-out ID. (mm) | 220.5 |
| Overall Length (mm) | 930 |
| Length of first-stage plug (mm) | 400 |
| Length of Closing plug (mm) | 286 |