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Choke manifold
Choke manifold is a necessary device for controlling well kick and implementing oil-gas well pressure control. When blowout preventer is closed, choke valve can be turned on and off to control certain casing pressures to keep bottom hole pressure a little higher than formation pressure all the time, lest formation fluid should further flow into well. Besides, when well is shut off, choke manifold can be relieved for the realization of soft shut-in. When the pressure rises to a certain level, it can be used to open the well for gushing so as to protect the well.
Choke manifold is composed of choke valve, gate valve, pipeline, pipe fittings and pressure gage, etc.
When well pressure rises, the choke valve (it falls into three kinds: Manually adjustable, hydraulic and positive) on choke manifold can be turned on and off to release the fluid to control casing pressure. Gate valve can be used for direct blowout. When casing pressure is pretty high,
The pressure class of our company's chokes manifold falls into five class: 14MPa, 21MPa, 35MPa, 70MPa and 105MPa. Also, we can design according to customer demand.
Name
Choke manifold
Kill manifold
Model
JG/S2-35
JG/SY-35
JG/SY2-70
JG/S2Y2-105
YG-35
Y-70
YG-105
Main diameter and sideward diameterÂ
31/8× 21/16(80× 52)  41/16× 29/16(103× 65)  41/16× 31/16(103× 78)
 psi(MPa)
Working pressure psi (MPa)3000(21)
5000(35)3000(21)
10000(70)5000(35)
10000(70)
15000(105)
(° F)
Working temperature  º C (° F) LU  -46º C ~ +121º C    (-50° F ~ 250° F)
Working mediums
Drilling fluid,  mud and petroleum (with sulfuretted hydrogen)
Control type
Two-winged manual choke valveÂ
Two-winged  hydraulic manual choke valveÂ
Three-winged hydraulic manual choke valve
Four-winged double-hydraulic manual choke valve
Two-winged main relief valveÂ