pumping unit

API 16A Annular Blowout Preventer BOP

2019-08-22 17:03:00 42

API 16A Annular Blowout Preventer  BOP

Product Description


The Blowout preventer(BOP) is an essential pressure control device during drilling and operations, as it serves to prevent the uncontrolled leakage of oil/gas from the wells.Over the past 40 years, Shengji has been maintaining and repairing BOPs at the Shengli oilfield. In 2006, Shengji got its API 16A certificate (certificate No. API 16A-0172) for fabricating BOPs and related accessories. Since then, Shengji has developed three series of BOPs; a drilling BOP, a work over BOP and oil producing BOP. Shengji can also produce annular BOPs, single ram BOPs and double ram BOPs. The BOP rams are manifold, including: blind ram, pipe ram, shear ram and variable diameter ram. Due to its stable performance and long service life, Shengji BOP wins high praise from our customers.

Shengji's APi 16A hydraulic annular BOP can be used in work over and driling operations equipped with hydraulic control systems.The BOPs are designed and manufactured in fully conformity to the API 16A standard. The annular BOP mainly consists of a body, a header, a rubber core and a piston. The inner rubber core is interchangeable.While the annular BOP can be used independently, it normally works with a single or a double BOP.It can seal the drilling tool or well bore efficiently, preventing oil well blow outs.Its anti H2S performance conforms to the NACE MR 0175 standard.API 16A Annular Blowout Preventer BOP

Key Feature


1.Annular BOP can fully seal the wellhead when there is no string inside the wellbore.

2.Annular BOP can seal the annulus space of the wellhead when there is a string, wire line and cable inside the wellbore.

3.Snubbing can be performed if the butt welding drill pipe has an 18°bevel. 

4.Equipped with an energy accumulator, and a tubing coupling can pass through the annular BOP under pressure when well pressure is less than 3Mpa.





Nominal diameter(in)

7 1/16

7 3/8

Rated working pressure(psi)



Strength pressure test(psi)



Oil cylinder working pressure(psi)



Piston stroke



Metal temperature class



Nonmetal temp. class



Oil cylinder closed chamber volume



Oil cylinder open chamber volume



Bolt quantity and diameter

12-M30 x 3 x 140

12-M36 x 3 x 180

Ring gasket




737 x 740

737 x 770





API 16A Annular Blowout Preventer BOP

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Quality Control

API 16A Annular Blowout Preventer BOP 

Company Information

SHENGJI GROUP (formerly known as General Machinery Plant,SINOPEC) established in 1964 and restructured in 2007, covers an area of 158 acres, 1500 employees,1200 advanced equipment, annual revenue $150 milliion. SJ has 18 production plants, 8 subsidiaries and several offices around the main oilfield in the world.The group owns high level R & D center and National Laboratories carrying out strategic cooperation with China University of Petroleum and other several scientific research institutes of SINOPEC. SJ has obtained more than 150 national patents.The products have been exported to U.S.A, Canada, Peru, Ecuador, Venezuela, India, Saudi Arabia, Oman, Bahrain,  Iran,Turkmenistan,Kazakhstan,Russia,Sudan,etc.Shengji is Sinopec, CNPC, CNOOC, Shell, Chevron, GE, Schlumberger, Haliburton, Weatherford excellent supplier.

API 16A Annular Blowout Preventer BOPAPI 16A Annular Blowout Preventer BOPAPI 16A Annular Blowout Preventer BOP 

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API 16A Annular Blowout Preventer BOP