I have a job with 500+ feet of slick line 2 1/2" that I want to blow out. using all the proper air attachment and catcher. do I have to run a ball a second time to make sure there is not any slurry left in the pipe ? and if anyone has any other helpful ideas.

Yes have a guy film it. I would love to see it. Dont post it but give it to me. I will have some people go over it and check it out.  Be safe my friend and keep everyone out of range witch is about a mile. lol

IF you have it all together and blowit out at a safe speed with a 'tight' ball, a second time is not needed. But then IF you have it all together, what would it hurt? You can always do the "sponge - water - sponge" program the first go round.

Put tight ball in one end of 10 foot pipe, fill with water, put one tight sponge in other end of 10 foot pipe and attach pipe to existing slick line and attach blow out cap to water filled pipe.

what i do is clean out like a foot of the end that your going to hook to on the slickline and then pour some water in then put a sponge in like a 2.5 or maybe even 2.5 with a rag around it and then hook everything up and start to blow then if you can have someone run along the pipe and tap on it with a hammer to see how far along you are then you can judge how much air to use then you dont have a huge blast at the end thats my advice hope it helps

the set up will be 5x4 elbo off the pump then 4x2 1/2 reducer then into 2 1/2 elbo then straight down about 35' this is a 5 story under ground parking garage. I also want ideas on a hammer valve should it be on the top or the bottom ?

mite want to throw some bags in down the drop and maybe some slurry and the bottom of the drop

i would definently use baggies to hold your water back on the drop, i have found that a small sponge soaked in hydrolic oil will work also, when blowing out pipes, as long as you push a tight sponge at a slow speed u should be good, but if it's all hooked up, u might as well put some insurance on it and blow a 2nd one threw

What kind of pump are u using. Yesterday i pump through 400' of 2.5" with a tk50. We went through the woods uphill about 50' then strait downhill from there. when done I pumped hopper down and sucked a sponge back to the pump. I havent blown out system in a long time.

for my line pump i use scwhing WPT70 seems to be a good pump, i usually suck a sponge back as well,but it will not suck more than 180' of 2.5" of rubber

I have visions of slinky the cobra here,make sure the discharge side is secured.Using a catchers mit not approved unless your over 300 lbs,just kidding.

Many,

I was assuming ALL PIPE, I know, don't assume.

You can't blow out ANY HOSE at the end that the air will exhaust. You can, but if/when someone is hurt, well that's your ass. NO way to fight that, you would be flat wrong.

Can I ask why you don't use water? I think it's safer in the long run.I understand you have all the proper stuff to blow out with air.But water would be safer

Just asking

Ruck

BV,all kidding aside.Make sure you are using a proper blow out cap,2 valves and good communication with the air side.As for the discharge side there is always the option of staying plugged in during this.As your pumping in reverse slowly apply air to only assist the ball.This is a simple process and lightly tap on pipe and follow,when close to end dump air,close air off,open dump valve.When ball is say 100' or so stop air and pump should be able to pull.

As a note of safety,never open clamp untill air is disconnected and both valves open.Oh,make sure the mud is a little loser that's in the system to aid in cleanout.

Well let’s get this clear. The danger of blowing out a system is not just the pressure but also the high volume of the compressed air. If you want to blow out 500 feet of 2.5inch line there is almost 1 yard of concrete in it. then if you put the hole 115 psi on the line and the ball comes out, there is also 8 yard’s of air coming free. How ever keeping your pressure as low as possible you cane reduce the amount of air coming free to a ½ to 1 yard. Our practice is blow out the line tile the ball is 10 \ 15 feet from the end release the air, this connect the system walk the last feet’s empty, carry the last dirty hose with the ball in side to the pump and blow out the ball. A little air is enough.

sorry for the late reply but I was in Mexico for 4 days. thanks to all of you that replyed on the air blow for the 21/2" pilpe

BV