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Yancheng Qihang Petroleum Machinery Co., Ltd
Yancheng Qihang Petroleum Machinery Co., Ltd

China API 16A Annular Blowout Preventer BOP manufacturer


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API 16A Annular Blowout Preventer BOP 

Payment Terms: T/T,L/C 
Place of Origin: Jiangsu, China (Mainland) 
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Product Detail

Model No.: QH-FH35-35
Production Capacity: 10 Sets/Month
Delivery Date: 45 Days
Nominal Bore: 7-1/16", 11", 13-5/8", 20-3...
Material Class: AA, BB, CC, DD, EE, FF
Temp Class: L, P, R, S, T, U, V
Performance Requirement: PR1, PR2
Paint Color: Red or Customized
Means of Transport: Ocean
Packing: Plywood
Product Name: Annular Blowout Preventer
Working Pressure: 2000 PSI - 10000 PSI
Material: AISI4130 Forged
Product Specification Level: PSL1 - PSL4
Standard Carried: API Spec 16A, NACE-MR0175

API16A Annular Blowout Preventer (BOP)
Nominal Bore: 7-1/16", 11", 13-5/8", 20-3/4", 21-1/4"
Working Pressure: 2000 PSI - 10000 PSI


A Blowout Preventer (BOP) is a large, specialized valve or similar mechanical device, used to seal, control and monitor oil and gas wells to prevent blowouts, the uncontrolled release of crude oil and/or natural gas from a well. They are usually installed in stacks of other valves.

An Annular Blowout Preventer can close around the drill string, casing or a non-cylindrical object, such as the kelly. Drill pipe including the larger-diameter tool joints (threaded connectors) can be "stripped" (i.e., moved vertically while pressure is contained below) through an annular preventer by careful control of the hydraulic closing pressure. Annular blowout preventers are also effective at maintaining a seal around the drillpipe even as it rotates during drilling. Annular BOPs are typically located at the top of a BOP stack, with one or two annular preventers positioned above a series of several ram preventers. Annular preventers have only two moving parts, piston and packing unit, making them simple and easy to maintain relative to ram preventers.

The Annular BOPs manufactured by our company features a compact structure, which can seal Kelly, drill pipe sub, drill collar, and various shapes and sizes of cable. Meanwhile, the annular BOP can provide fixed pressure control during running and retrieving drill pipes. 

Detailed Specifications:

Product Name: Annular Blowout Preventer (BOP)

Nominal Bore: 7-1/16", 11", 13-5/8", 20-3/4", 21-1/4"

Material: AISI 4130 (Forged)

Main Parts: Upper Housing, Body, Piston, Retainer Ring, Packing Unit and Wear Ring.

Top & Bottom Connection: Flanged or Studded

Standards Applied: API Spec 16A, NACE MR0175

Pressure Rating: 2000 PSI to 10000 PSI

Material Class: AA, BB, CC DD, EE, FF

Temp Class: L, P, R, S, T, U, V

Operating Temperature: -18deg - 121deg

Paint Color: Red or Customzed

Performance Requirement: PR1, PR2

Product Specification Level: PSL1, PSL2, PSL3, PSL4

Application: Well Drilling, Well Control


  • Annular BOP can be spherical or conical. Spherical BOP can be completed with bolted cover or wedge cover.

  • Annular BOP is relatively simpler and easier to maintain than Ram Blowout Preventers.

  • Simple structure

  • Easy to operate

  • Reliable performance

Annular Blowout Preventers and Double Ram Blowout Preventer Produced by Qihang Wellhead

All of Qihang's raw materials and products are subject to rigorous and comprehensive quality check and testing.

Delivery of Qihang's Double Ram Blowout Preventer and Annular Blowout Preventers and BOP Control Unit 

Qihang produces Top Quality API 16A Annular Blowout Preventer (BOP) at Competitive Prices.

Contact us Today for your specific needs.

 Mr. Bruce

Tel: 0086-139-62481639
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Company Info

Yancheng Qihang Petroleum Machinery Co., Ltd [China (Mainland)]

Business Type:Manufacturer, Trading Company, Service
City: Yancheng
Province/State: Jiangsu
Country/Region: China (Mainland)

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