Drilling BOP is mainly used to control well pressure by quick well shut in case of overflow and well kick to prevent blowout.
U-shape Dual Ram BOP
Pressure containing parts are forgings, providing excellent strength and impact ductility.
A large inventory of ram rubber which can seal by itself.
Areas exposed to fluids are welded with high nickel-based alloy for sour service.
Annular BOP
Pressure containing parts are forged from premium alloy steel, providing excellent strength and impact ductility.
A large inventory of ram rubber, low frictional resistance during open/close, help to seal the well under pressure.
Packing is interchangeable with BOP of the same model abroad.
| Type | U-shape Dual Ram BOP | Annular BOP |
| Model | 7 1/16"~13 5/8" | 7 1/16"~13 5/8" |
| Rated Pressure | 2,000~5,000 psi 13.8 MPa~34.5 MPa |
|
| Hydraulic Pressure | 1,200~1,500 psi 8.3MPa~10.3MPa |
|
| Nominal Bore | 7 1/16"~13 5/8" | 7 1/16"~13 5/8" |
| Working Temperature | -29℃ ~121℃ (T-20) | |
| Medium | Oil, natural gas (H2S), water | |
| Standard | API 16A/NACE MR0175 | |
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