Piston pump

I bet its very complex for then You need to know the dimensions of the cylinder where the piston is located, the dimensions of the piston, the length of the pipes inside the well, the positive and negative head, the mptor specs., driving the piston, the diameters f the inlet/outlet and so on and on....

Easier, use a water flow meter and save all the trouble!!!!!

ducan,don't make it more complicated than it is. The question is : a tube vertically in a liquid , the piston or plunger set at the level as the liquid, now pull up the piston or plunger to create a vacuum, how far will the liquid fallow the piston up the pipe. Logically the piston is the same as the I.D. of the pipe, end .I think it has to do of the weight of the liquid per volume w/v but what is the formula for it ?

Johann you hust opened the pandora box. Read #3 . Now we all will have more and more questions. Lets enjoy the fun now.

Johann,

It will depend on how much air space you have between the piston and the liquid you are trying to raise.

Mike

you have a column of water of a certain diameter.

Let us say the cross section of the pipe is 1 cm and the well is 100 meters deep.(10,000 CM)

This column is then 10 liters. ~22 pounds

This entire column needs to be lifted.pressure at the bottom is 10,000 gms per square CM..

If you lift it 1 meter, then 100 CC spills out at the top and your string of pipes now drops down 1 meter(with appropriate valve closures) and you do the next lift.

fit this to your case by scaling

Usually the pump is a short stroke device located at the bottom of the well. Typically a number of rods and centering spiders go down the hole to the lift plunger fitted inside the pipe as an integral part. The rods push the piston down and built in flapper valves allow the fluid up through the piston. A foot valve prevents back flow. When the string of rods is lifted it lifts the entire fluid filled column by the stroke of the pump, and of course the filled column empties at the top into some collection mechanism, barrel etc. In the case of sour oil with H2S under pressure entrained in the oil, a sealed gland for the rod to move through is provided with a froth separator tank and a way to deal with the pressure and the sour gas is dealt with safely (H2S is 100 times a toxic as CO, but it stinks so that people are usually warned off). In the case of water it may just spill into irrigation ditches.

They cannot use a cable to pull the piston as you cannot push on a rope.

the common horsehead or walking beam you see on oil fields is of this type

http://www.roadsideattractions.ca/oilpump.htm

http://www.modellerschoice.com/DesktopDefault2.aspx?tabid=41&productid=6705

http://www.acclaimimages.com/search_terms/walking_beam.html

equal to the stroke of pump

what a confusing question. If the cylinder is below or on the same level as the liquid, your only variable is the weight of the liquid in the stand pipe and the amount of horsepower necessary to move the piston up and down. If you have unlimited horsepower, you can pump to an infinite height. If the pump is above the liquid, you are depending on ambient air pressure to push the liquid up the pipe, so you need to be concerned about how tall a column of liquid can be supported by air pressure. Water is about 30 feet at sea level. Mercury is about 30 inches. Other fluids will depend on the density of the fluid. You can vacuum pump petroleum much higher than 30 feet. But put your piston at the bottom of the hole on a level with the fluid or below and attach a powerful enough engine and your standpipe could be as high as the moon.

Thanks guys. I have a more serious question, Why is everybody reading something into this question that is not ask for. So let me rephrase it.

Set a bicycle pump next to a tub of water, hold or press the handle all the way down,put the hose into the water and than pull up the handle. How much water can you lift by the vacuum created below the plunger - seal.

I know the amount will vary because of the different weights of the liquid's. Don't tell me you can lift it up to the moon if the pipe is long enough or how many hp it takes or the cable will bend also diameter of the pipe makes no difference.

There is a formula that is used how much liquid weight can be raised in a vacuum tube created by a plunger . WHAT IS THAT FORMULA ??

Patm - Pvapor = rho*G*h/Gc

Patm - atmospheric pressure

Pvap - vapor pressure of the fluid

Rho - fluid density

G - acceleation due to gravity

Gc - Gravitational conversion constant (english units only)

H - columb of liquid hieght

Excellant answer Capn! Give this man a vote. (I did)

Vapor pressure of the liquid is the key variable in determining how high a vacuum can lift a liquid. Of course if the liquid is Hg, density also becomes a factor. Compare 29 inch lift for Hg vs. 33 feet for water. Another minor effect might be temperature, in so far as it affects the liquid density.

the max height you can draw water u into a standpipe is limited to the 14.7 PSI pressure yoiu gave at sea level. about 32 feet. We use large water columns like this, called barometric columns for process water control. Warmer water = lower heigght, as it is a function of vapor pressure.

When you said oil pump, that type is down at the bottom of the hole and does not suck, instead it is pulled uop by the rods, some pupms are quite deep