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What are the two types of blowout preventer?

Feb. 27, 2024

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### Types of Blowout Preventer.

A blowout preventer is a critical piece of equipment used in drilling operations to prevent the uncontrolled release of oil and gas from a well. There are two main types of blowout preventers, annular blowout preventers (BOPs) and ram blowout preventers.

What are the two types of blowout preventer?

#### Annular Blowout Preventer (BOP).

An annular blowout preventer, also known as a spherical blowout preventer, is a large, donut-shaped valve that can be closed around the drill pipe or casing to prevent a blowout. It consists of a rubber sealing element that can expand and contract to create a seal around the drill pipe. Annular blowout preventers are commonly used in combination with ram blowout preventers for increased safety.

- **Operation**: Annular blowout preventers can be closed hydraulically or manually to create a seal around the drill pipe. The rubber sealing element provides a flexible and adaptable seal that can accommodate variations in the size of the drill pipe.

#### Ram Blowout Preventer (BOP).

A ram blowout preventer uses two opposing steel plates, known as rams, to seal off the wellbore in the event of a blowout. There are two main types of ram blowout preventers - blind rams and pipe rams.

- **Blind Ram**: Blind rams are solid steel plates that can be closed to seal off the wellbore when there is no drill pipe present. They are used as a last resort when other blowout preventers fail to control the flow of oil and gas.

- **Pipe Ram**: Pipe rams have a groove that allows them to close around the drill pipe, providing a more secure seal. They are commonly used when the drill pipe is present and need to be sealed off quickly.

In summary, annular blowout preventers utilize a rubber sealing element to create a flexible seal around the drill pipe, while ram blowout preventers use steel plates (blind rams or pipe rams) to seal off the wellbore in different scenarios. Both types of blowout preventers play a crucial role in ensuring the safety of drilling operations and preventing catastrophic blowouts.

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