Annular BOP

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 wellbore efficiently, preventing oil well blowouts.

Description
Inquiry

Working Principle:

When wells must be sealed in case of kicks high pressure (10.5Mpa) oil from control systems enters into close-cavity under piston from housing oil outlet, to promote plastic core moving upward along ball surface, so that bearing tendons move closer to each other to move the rubber between them to the center of wellhead so as to seal drilling tools or fully seal wellhead. In the opening, hydraulic pressure oil enters into the open cavity above the piston from the housing inlet, to push the piston moving downwards, so that plastic will reset with its own elasticity, wellhead will be open.

Specifications:

Model	Main bore mm(in)	Working pressure MPa (psi)	Operating Pressure MPa	Connection type		Dimension mm mm		weight kg
Model	Main bore mm(in)	Working pressure MPa (psi)	Operating Pressure MPa	Top	Bottom	OD	Height	weight kg
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	228 (9)	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