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The HFH plug is sealed at the designated position of the working cylinder by the sealing assembly, so that the pressure under the HFH type plug is sealed, and there is no pressure above the HFH type plug to ensure the safe operation of the wellhead.
Size | Lock cylinder salvage diameter | fishing neck |
1.875＂ | 2＂ | 1.375＂ |
2.313＂ | 2.5＂ | 1.375＂ |
2.813＂ | 3＂ | 1.75＂ |
3.813＂ | 4＂ | 3.125＂ |
HFH plugs is composed of inner salvage neck, nut, retaining ring, elastic retaining ring, outer cylinder, sealing assembly, lock cylinder key, etc.
When the HFH type plug is downhole, the key of the lock cylinder is retracted and will not be seated; when it reaches the predetermined position, the plug cannot be moved down, so it is jarred down slowly to make the plug firmly seated, and then the type A is cut off by jarring downward. After lowering the shear pin of the tool, continue to lower the key, the lock cylinder key will be propped up under the action of the inner salvage neck cone surface, continue to lower the A-type lowering tool, the lock cylinder of the A-type lowering tool is recovered, jarred upwards, and cut off Insert the shear pin of the tool and pull out the tool.
1. Before going downhole each time, check that the lock cylinder key can shrink freely without jamming, and replace the broken pin.
2. Check the sealing assembly to ensure that the sealing assembly is intact (if damaged, replace it in time).
The HFH plug is sealed at the designated position of the working cylinder by the sealing assembly, so that the pressure under the HFH type plug is sealed, and there is no pressure above the HFH type plug to ensure the safe operation of the wellhead.
Size | Lock cylinder salvage diameter | fishing neck |
1.875＂ | 2＂ | 1.375＂ |
2.313＂ | 2.5＂ | 1.375＂ |
2.813＂ | 3＂ | 1.75＂ |
3.813＂ | 4＂ | 3.125＂ |
HFH plugs is composed of inner salvage neck, nut, retaining ring, elastic retaining ring, outer cylinder, sealing assembly, lock cylinder key, etc.
When the HFH type plug is downhole, the key of the lock cylinder is retracted and will not be seated; when it reaches the predetermined position, the plug cannot be moved down, so it is jarred down slowly to make the plug firmly seated, and then the type A is cut off by jarring downward. After lowering the shear pin of the tool, continue to lower the key, the lock cylinder key will be propped up under the action of the inner salvage neck cone surface, continue to lower the A-type lowering tool, the lock cylinder of the A-type lowering tool is recovered, jarred upwards, and cut off Insert the shear pin of the tool and pull out the tool.
1. Before going downhole each time, check that the lock cylinder key can shrink freely without jamming, and replace the broken pin.
2. Check the sealing assembly to ensure that the sealing assembly is intact (if damaged, replace it in time).
