Nowadays, there are several manufactures providing this equipment such as Hydril, NOV (Shaffer) and Cameron. The following videos will help you understand how the annular preventer work. Open – On the other hand, if the hydraulic fluid is pumped into the retract port, the element will be pushed down resulting in releasing the tubular. The illustration below demonstrates the drawing of an annular preventer.Ĭlose – When the hydraulic oil is pumped into the extend port, the element inside will be lifted and squeezed the pipe/tubular. The annular preventer consists of a body, a cap, a piston and a rubber packing element. There are some models which can utilize wellbore pressure to provide additional sealing capability. Blowout Preventers - Weatherford International Hydril Gk 13 5 8 Operation Manual download free Download Hydril gx annular operator manual.pdf Download Opel. The annular preventers are able to seal around several size of drill pipe/drill collar, work string, wireline, tubing, etc. Annular preventers are the most versatile well control equipment and there are many names referring it as bag preventers, or spherical preventers.
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