API standard Caremon and Shaffer Annular Blowout Preventer (BOP) with spherical rubber for well head control equipment

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US $90,000-1,000,000 / Sets | 1 Set/Sets (Min. Order)
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Quick Details
Place of Origin:
Jiangsu, China (Mainland)
Brand Name:
Model Number:
Machine Type:
Drilling Equipment
Carbon Steel
Processing Type:
Oil Drilling Rig
Packaging & Delivery
Packaging Details
Export packing for API standard Caremon and Shaffer Annular Blowout Preventer (BOP) with spherical rubber for well head control equipment
Lead Time :
30 day


Product Description
annular BOP

 1.Annular BOPs are designed to form a seal in the annular space between the drill pipe and the wellbore and are usually mounted at the top of the BOP stack.

2.Annular BOP is used for controlling wellhead pressure during drilling to prevent well blowout effectively and realize safe

Adopts sphere rubber core or tapering core structure.

The top and bottom connection is flange or thread.



 1. Standard:API16A 

 2. Bore size:7 1/16—21 1/4” 

 3. Material :forged and casing 

 4. Pressure: 2000-10000psi


There are A type (cone gum core )annular BOP and D type(ball gum core) annular BOP



1. Annular Blowout Preventer

Technical parameter

1.13 5/8" 10000 / 15000psi Annular Blowout preventer

2.Shaffer and Hydril type  BOP

3.Annular BOP is simple and requires less-maintenance.

4.Low profile saves the installing space.

5.Packing unit has enough rubber volume and long service life.

6.Wide losing rang, losing various sizes of drill tools and wire line less than Bop bore

7.According to the latest API Spec 16A standard,NACE MR-01-75andquality standard of  ISO 9001

8.H2S Trim.

9.Packing unit can be interchanged by Hydril's

10.Top connection:13 5/8"10000psi 6BX BX159 CRA Studded or Flanged

11.Bottom connection: 13 5/8" 15000psi 6BX BX159 CRA Flanged or Studded


13.Dimension:1636 x 1636 x 1802

14.A hydraulic control system is used to close or open the annular preventer,when it is closed,high pressure oil is directed to the closing chamber positioned in the lower side of the piston,causing the piston to move upward.The rubber core is compressed by the moving piston.Because the annular BOP has a cap,the packing unit can not move upward and only can move toward the center of the well to pack off a string or seal off the well.

When well open is required,operate the reversal valve to direct high pressure oil from the upper oil-port into the chamber in the upper side of the piston so as to push the piston to move down,and then the closing chamber is relieved,the squeeze pressure at the cone of rubber core is removed,the wellhead is opened.


2. Annular BOP Available:

working Pressure (MPa)

Bore Sizes (mm)

















14       √ 

 3.BOP Technical Specification:

No.ItemTechnical Specification
1Standard: API Spec 16A
2Bore size:7-1/16” - 26-3/4”
3Working pressure:2000psi-10000psi (14 Mpa-70Mpa)
4Operating temperature:-18deg--121deg
5Top & nottom connection:Flanged,studded, etc.
6MaterialAISI 4130, AISI4140, 35CrMo, Forging or Casting
7Ram Type:Pipe ram, bland ram, variable ram and shearing ram



Packaging & Shipping
Company Information

Rugao Yaou Import and Export Trade Co.,Ltd is an international integrative

Corporation in oil/gas drilling industry ,combined with sales,service and technical consult.its was founded in 2002 with expression of passion,professional and advance.As  a fresh power,we are impacting and pushing China oil well equipments to expand and service the world market

Our supply scope has covered most products of oil/gas drilling and service:oil drilling rig/worker rig,spare parts on rig ,drill handling tools,downhole tools.pipe line,wellhead control equipment,solid control equipment,Wellhead cement tools,fishing tools,oil production tools etc,as well as accessories.We regulatethat every product which deliver to oilfield must be compliance with latest API and ISO standard ,from producing to inspection to transportation,Rugao Yaou has many techinicians to supervise and control the quality ,packing and shipment ,and feedback all information to customers at he first time.sometimes we also can provide GOST standard according to client special request

Meanwhile,Rugao Yaou is pleasure to support technology advice and proposal to oilfields and factories .An effective team gathered from various branch of oil industry is touching and serving to world wide oilfield .In a very long period,Rugao Yaou has been striving the interchange ablity between China-made and other countries .We believe communication is the recourse of our inspiration.

Based on China fast-development petroleum machine industry system,Rugao Yaou Import and Export Trade Co.,Ltd has already established a stable and complete recourse net.We have gained the close relationship and priority from many powerful manufacturers .This obvious advantage makes us always can supply competitive price,technology and delivery.

Rugao Yaou is a bridge .Connect China With  world

Our Services

 The after-sale service work is an important part of our marketing and sales work

The quality of service provided will not only influence the company credit,

But also closely relate to the safely running of the equipments.

In order to maintain the good reputation,yaou company will strictly observe relevant national regulations about produce-quality law and provide high quality products with the principle of hospitable reception,enthusiastic service,quick response and prompt resolution.we will conscientiously implement the after-sale service work in full-scale,and make commitment to our dients as follows:

1)all products are customized according to customer’s requirements,and loyalty to customer.

2)Once found size and quality problems,pls contact us in time,we will solve the problem for customers in the    first time,strictly in accordance with regulations of the company

3)Once found you get loss because of our fault,all charges shall be borne by yaou company.

4) The loss caused by improper use by the customer,shall be borne by the yours,but company should offer      technical assistance to help customers to solve practical problems

5)We are professional oilfield equipment supplier in China more than 10 years.

6)Backup skillful and experienced sales team would help you get an efficient solution.

7)We have our own logistics company and this could guarantee the service after sales


Company view of Rugao Yaou                                             


























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