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API BOP spherical rubber core packing element bop packing unit


Spherical rubber core Features:
1)Used as BOP seal rubber
3)Pressure: 2000-15000psi
4)High quality with the best price
5)Fast delivery
The packing element for Annular BOP FH35-35 is a special high-performance product which is developed and updated lately for preventing blowout. The packing element is combined by the main body which is made up of the independent innovation rubber-based polymer alloy material and the high strength metal frame, which conforms to the USA 16A, SATM D412, D624, D2240, and D471 standards. It is suitable for the drilling work on the oil field, which shares a high-cost performance compared to the other same types of packing elements. And the repair seal kits are equipped.

Spherical rubber core

Model Dimensions(mm) Weight(kg) Working Temperature Range Of Seal Well
FH18-21 Φ478×215 65.2 – 18~93°C 0-180
FH28-35 Φ703×323 270 0-280
FH35-35 Φ478×215 370 0-346.1

In the structure, it is divided into annular blowout preventer with spherical plastic core, annular blowout preventer with cone-shaped plastic core, and blowout preventer with tube-shaped plastic core. Annular BOP top cap and housing are connected by bolts or claw blocks

Blowout preventer with spherical plastic core and dust-proof ring.

Performance characteristics: reasonable structure, easy operation, long life of plastic core, adapt to a wide range, capable to seal pipe string with nominal paths from 0-DN in ans shapes, better performance by combining with ran blowout preventer in the use.

Working Principle

When wells must be sealed in case of kicks high pressure (10.5Mpa) oil from control systems enters into close-cavity under piston from housing oil outlet, to promote plastic core moving upward along ball surface, so that bearing tendons move closer to each other to moce the rubber between them to the center of wellhead so as to seal drilling tools or fully seal wellhead. In opening , hydraulic pressure oul enters into open-cavity above piston from housing oul inlet, to push piston moving downwards , so that plastic will reset with its own elasticity, wellhead will be open.

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