brent217
Petroleum
- Sep 12, 2003
- 2
Hi guys, I am an MWD (Measurement While Drilling) Engineer with Sperry-Sun Drilling Services. I have an MWD manual that says a the pulsation dampner on a drilling rig should be set to between 30 and 40% of standpipe pressure in order for me to get the optimal pulse size from my MWD (positive pulse) tool, but my manual does not say why.
I have been asked at work to find out what happens if the pulsation dampner is set at 0%, 10%, 20% ... 100%, and 200% of standpipe pressure.
I know that at 0% there is simply no dampning effect on either my tool or the pump's pulses.
I have talked to several tool pushes that think that at 100%+ the pulsation dampner is also effectiveless, as they say that if the rubber bladder has the same pressure as the standpipe it cannot absorb anything, but I am not sure.
I have personally never seen a pulsation dampner with more than 40%, so I have no direct experience to compare to. Anyone have any ideas, or can link me to a manual that explains exactly how a pulsation dampner absorbs pulses in the standpipe, and how the diferent settings are derived?
I have been asked at work to find out what happens if the pulsation dampner is set at 0%, 10%, 20% ... 100%, and 200% of standpipe pressure.
I know that at 0% there is simply no dampning effect on either my tool or the pump's pulses.
I have talked to several tool pushes that think that at 100%+ the pulsation dampner is also effectiveless, as they say that if the rubber bladder has the same pressure as the standpipe it cannot absorb anything, but I am not sure.
I have personally never seen a pulsation dampner with more than 40%, so I have no direct experience to compare to. Anyone have any ideas, or can link me to a manual that explains exactly how a pulsation dampner absorbs pulses in the standpipe, and how the diferent settings are derived?