13 5/8"-5000psi Hydril Annular Bop Casted API 16A
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13 5/8"-5000psi Hydril Annular Bop Casted API 16A Shaffer Annular Bop The annular preventer (also called bag type, spherical or universal preventer) is the most versatile piece of equipment on the BOP stack since it can close around the casing, drill ......
Hebei E-valves Petroleum Equipment Co., Ltd.
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