The GYF hydraulic stage collar is a hydraulically opened staging cementing device. The circulation hole is opened through the crappy pressure in the tube to provide a channel connecting the annulus. After the cement slurry is injected, the closing plug is replaced to push the sliding sleeve downward to close the circulation hole, and the circulation channel is permanently locked. It can be used for double-stage cementing or liner hanger top-cementing operations in vertical wells, horizontal wells and extended well.
| Size | Casing（Thickness） | Sealing Capacity MPa | ||
| In | mm | Lb/ft | mm | |
| 5-1/2 | 139.7 | 17 20 | 7.72 9.17 | 35/50 |
| 7 | 177.8 | 26 29 32 35 | 9.19 10.36 11.51 12.65 | 35/50 |
| 7-5/8 | 193.7 | 29.7 33.7 39 | 9.52 10.92 12.7 | 35/50 |
| 9-5/8 | 244.5 | 40 43.5 47 53.5 | 10.03 11.05 11.99 13.84 | 35/50 |
| 13-3/8 | 339.7 | 48 54.5 61 68 | 8.38 9.65 10.92 12.19 | 35/50 |
The GYF hydraulic stage collar is a hydraulically opened staging cementing device. The circulation hole is opened through the crappy pressure in the tube to provide a channel connecting the annulus. After the cement slurry is injected, the closing plug is replaced to push the sliding sleeve downward to close the circulation hole, and the circulation channel is permanently locked. It can be used for double-stage cementing or liner hanger top-cementing operations in vertical wells, horizontal wells and extended well.
| Size | Casing（Thickness） | Sealing Capacity MPa | ||
| In | mm | Lb/ft | mm | |
| 5-1/2 | 139.7 | 17 20 | 7.72 9.17 | 35/50 |
| 7 | 177.8 | 26 29 32 35 | 9.19 10.36 11.51 12.65 | 35/50 |
| 7-5/8 | 193.7 | 29.7 33.7 39 | 9.52 10.92 12.7 | 35/50 |
| 9-5/8 | 244.5 | 40 43.5 47 53.5 | 10.03 11.05 11.99 13.84 | 35/50 |
| 13-3/8 | 339.7 | 48 54.5 61 68 | 8.38 9.65 10.92 12.19 | 35/50 |
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