The Annular Blowout Preventer (BOP) is an essential safety device designed to control wellbore pressure during drilling operations. It consists of a body, upper housing, sealing element, dust-proof ring, and piston, ensuring rugged and reliable performance. The Annular BOP is widely used in offshore (subsea and surface) and onshore drilling applications.

  

Features:

• High Storage Capacity: Rubber core stores large quantities of glue, ensuring minimal friction resistance and superior pressure sealing ability.

• Even Load Distribution: The hemispherical head design prevents stress concentration, evenly distributing casing stress and simplifying maintenance.

• Compact and Efficient Design: Short piston stroke, low height, and integrated wear ring enhance performance and durability.

• Long-Life Sealing Element: Designed for extended service life, providing a positive seal even after numerous tests at full working pressure.

• Simple and Strong Construction: Only five major components, simplifying maintenance and reducing downtime.

• Advanced Corrosion Resistance: High sulfate-resistant internal parts are surfaced with high nickel-base alloy, offering resistance against H₂S, CO₂, and other corrosive elements.

• Versatile Application: Capable of sealing a wide range of equipment, including Kellys, drill pipes, tool joints, drill collars, casing, and wireline.

• Compliance with Industry Standards: Manufactured in accordance with API Specification 16A and NACE MR0175 per API Specification 16A, ensuring reliability and safety.

• Temperature Resistance: Standard nitrile packing element withstands temperatures ranging from 40°F to 170°F.

Technical Data

The following table outlines the specifications for different models of the Annular Blowout Preventer:

Annular Blowout Preventer Specifications

Model	Main Bore mm (in)	Working Pressure MPa (psi)	Operating Pressure MPa	Connection Type	Dimension mm	Weight kg
			Top	Bottom	OD	Height
FH18-21	179 (7-1/16)	21 (3000)	8.4–10.5	Studded	Flanged	737	743	1350
FH18-35	-	35 (5000)	-	-	737	790	1572
FH18-70/105	-	70 (10000)	-	-	1092	1136	5070
FH23-21	228 (9)	21 (3000)	-	-	900	830	2104
FH23-35	-	35 (5000)	-	-	998	1200	3540
FH28-21	279 (11)	21 (3000)	-	-	1013	838	2574
FH28-35	-	35 (5000)	-	-	1138	1081	4410
FH28-35/70	-	35 (5000)	-	-	1138	1096	4451
FH28-70/105	-	70 (10000)	-	-	1448	1420	10800
FH35-35	346 (13-5/8)	35 (5000)	-	-	1270	1160	6400
FH35-35/70	-	35 (5000)	-	-	1270	1227	6843
FH35-70/105	-	70 (10000)	-	-	1640	1664	15110
FH43-35	425 (16-3/4)	35 (5000)	-	-	1524	1320	10834
FH48-70	476 (18-3/4)	70 (10000)	-	-	1937	1882	27161

Model	Main bore mm(in)	Working pressure MPa (psi)	Operating Pressure MPa	Connection type		Dimension mm		weight kg
				Top	Bottom	OD	Height
FH18-21	179 (7-1/16)	21(3000)	8.4～10.5	studded	fanged	737	743	1350
FH18-35		35(5000)				737	790	1572
FH18-70/105		70(10000)				1092	1136	5070
FH23-21	228 (9)	21(3000)				900	830	2104
FH23-35		35(5000)				998	1200	3540
FH28-21	279 (11)	21(3000)				1013	838	2574
FH28-35		35(5000)				1138	1081	4410
FH28-35/70		35(5000)				1138	1096	4451
FH28-70/105		70(10000)				1448	1420	10800
FH35-35	346 (13-5/8)	35(5000)				1270	1160	6400
FH35-35/70		35(5000)				1270	1227	6843
FH35-70/105		70(10000)				1640	1664	15110
FH43-35	425 (16-3/4)	35(5000)				1524	1320	10834
FH48-70	476 (18-3/4)	70(10000)				1937	1882	27161

 

Installation & Maintenance

• Proper Installation: Ensures optimal performance and prevents operational failures.

• Regular Inspections: Recommended to check wear and damage to maintain efficiency.

• Lubrication: Periodic lubrication of moving parts extends the service life.

• Storage Guidelines: Store in a controlled environment to prevent corrosion and degradation.

• Spare Parts Availability: Standardized and interchangeable spare parts facilitate quick replacements.

• Follow Manufacturer Guidelines: Adhering to specified maintenance procedures maximizes operational efficiency.

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