Differential Valve - American Completion Tools

	Differential Valve

DIFFERENTIAL VALVE
This valve is used as the bleed valve in chamber lift installation for bleeding the tail chamber gas from the chamber, which allows for the formation to refill the chamber. The valve is normally open and closes when differential pressure closes against the calibrated spring.

FUNCTION
When chamber is empty, there is a reduction in chamber pressure. Due to this differential, valve opens which allows the passage of gas from the top of chamber and prevents trapping of gas in top of the chamber. When gas pressure on the top of the liquid in the chamber increases, the spring compresses & valve closes.

Engineering Data for Differential Valve
Type	Assy. No.	Nominal OD (inch)	Packing OD (inch)		Latch Or End Conn.	Running Tool Type	Pulling Tool Type	Mandrel Type
			Upper	Lower
PDV	160-1024-320-00	1	1-1/32	1-1/32	-	-	-	Series -12
PDV-R	160-1024-320-01	1	1-1/32	1-1/32	BK-2, M	MR	MP	TMP