Linde Polymer Tec Co.,Ltd. is one of the most experienced manufacturers and suppliers of drilling rig blowout preventer back-up rings in China, also supports customized service. Please feel free to buy high quality drilling rig blowout preventer back-up rings for sale here from our factory.
Products Description
Drilling rig blowout preventer back-up rings are a key component used in oil and gas drilling operations to prevent blowout accidents. They are usually installed in the Blowout Preventer (BOP) as part of the sealing device to ensure that the wellhead is effectively sealed under high pressure.
A key component of BOPs is the back-up ring, which plays a vital role in ensuring the integrity of seals under high-pressure conditions.
Benefits of Drilling Rig Blowout Preventer Back-up Rings
- Prevents O-Ring Extrusion: Back-up rings are designed to prevent O-rings from being extruded into gaps during high-pressure operations.
- Pressure Distribution: They help evenly distribute pressure on the O-ring, which is critical in systems that experience fluctuating pressures or varying gap sizes.
- Reduces Friction: Back-up rings minimize friction between the O-ring and the housing, which helps reduce wear and extend the life of the sealing components.
- Thermal Barrier: They act as a thermal barrier, protecting the O-ring from overheating, which can compromise its structural integrity and sealing effectiveness.
Material Technical Data Sheet
| FKM 90 | Property | Unit | Test Method | Test Parameter | Value |
| Hardness | Shore A | ASTM D 2240 | 90 ±5 | ||
| Specific gravity | g/cm3 | ASTM D 1817 | 1.79 | ||
| Tensile strength | MPa | ASTM D 412 | 10 | ||
| Ultimate elongation | % | ASTM D 412 | 116 | ||
| Compression set | % | ASTM D 395 B/1 | 24h / 200°C | 34.8 | |
| Low temp. resistance | °C | ASTM D 1329 | TR10 | -48 | |
| Bending test | internal | 4h / -55°C | pass |
Importance in BOP systems
Durability: Especially when operating in deep water and harsh environments, backup rings need to have a long life to reduce maintenance frequency and extend service life.
Quick replacement: Some BOP designs allow for quick replacement of backup rings to minimize maintenance time and improve operating efficiency. For example, the locking head design of the Hydril GL BOP allows for quick and sure removal of the head for replacement of the sealing unit or other maintenance with minimal time.
Versatility: The backup ring is not only used for sealing but also allows drill pipe rotation and tool joint stripping in the closed state while maintaining a complete seal against the pipe.
Automatic balance: Some BOP designs, such as the Hydril GL, have a unique secondary chamber that automatically compensates (balances) the effects of hydrostatic pressure on deepwater marine risers.
High-pressure hydraulic system: The backup ring operation of the BOP relies on a high-pressure hydraulic system that is always on standby, which stores hydraulic fluid through an accumulator to ensure that the BOP gate can be quickly closed or opened during drilling and completion operations.
about Us
Linde Polymer Tec Co., Ltd. mainly produces a variety of rubber compounds and rubber seals and currently has more than 3,000 material formulas and more than 2,000 product specifications. Products are suitable for automotive, aviation, machinery, petrochemical, medical, food, electronics, military, industrial, and other fields. Since the establishment of the factory, the company has completed the process consistency operation, and the product yield rate has reached 97.1%.
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