| |
Shown below in Figure #1 is a 2 3/8" below
packer valve (BPV). A BPV checks the flow direction and supplies
an adjustable degree of backpressure to the pump discharge.
Particularly at DGWS start up, this prevents excessive flow
rates flowing through the DGWS system in below production
disposal applications when the pump intake pressure is greater
then the injection pressure.
On specific DGWS start up's, the fluid level in the tubing/casing
annulus can be considerably high. Depending on the pump
intake depths, the high fluid level can contribute to a
high pump intake pressure. When the pump intake pressure
is considerably higher then the pump discharge pressure,
fluid will flow through the system at a much higher rate
then the pump capacity. To slow down or stop this excessive
flow rate a BPV is installed below the pump discharge. The
BPV can be installed in-line or most commonly, below the
isolation packer. In addition, the BPV serves as a below
packer check and is also available in 2 7/8" and 3
½" sizes.
|
