The oil liquid of tube in the upper pump should be drained off
during the whole barrel tubing type pump and special pump that
usually be used in domestic workover treatment ,the work need the
bottom of pump to connect a bleeder to be fullfilled.The working
principle is :the bleeder shoud be connected to the bottom of pump
and the upper part of standing valve, when the oil need be
discharged during the oilfield work ,lift the sucker rod string and
plunger assembly out of oil well ,put the impulse lever into the
pipeline, the impulse lower down to the bottom and break off the
draining pins of bleeder ,the upper oil liquid can be discharged
through the draining pins.
Currently, the bleeder that we maufactured contain two kinds of
dimension, the usage and effect are same.
There are two fixed modes of draining pins :
2.threaded connection type. The surface treatment contain
3 methods: phosphorization,blueing and galvanization.