WorldWide Drilling Resource

Jet Pumps by Bill Corey In the 1930s, jet pumps came into existence. Until then, if you wanted water with a pump, you had to be within 25 feet of the source. With the invention of the jet or packer, which is a pump all by itself, we now had the opportunity to draw water from100 feet or more! UsingBernoulli’s Law, there are three simple parts to a jet - the body, nozzle, and venturi. The body is what directs the water coming from the pump, known as the drive water, to the back or inlet of the nozzle. It also takes the water from the venturi tube and moves it to the inlet or suction of the pump. There is also a hole connecting the well to what we call the mixing chamber. There are three chambers in the body - one being connected to the drive pipe and ends with the water being forced through the nozzle. The nozzle is actually conical in shape. The big hole is where the drive water enters the nozzle, and in a very short distance the hole be- comes much smaller. This is where Bernoulli takes over and forces the water through the smaller hole causing it to speed up. The reason we want this to happen is because on the outlet of the nozzle - the mixing chamber - the water velocity increases. Higher velocity means lower pressure. The pressure drops to the point it causes the well water to be pulled into the mixing chamber. Just on the outlet of the nozzle is also the venturi tube. The hole in it collects the mixture of well water and nozzle water, hence the name mixing chamber, and pushes it through the venturi. As the water moves through the venturi, the tube itself opens wider at the discharge, which allows the water to slow down. As it slows, it converts the high velocity into higher pressure and pushes the water out of the body into the pipe leading to the suction. It is the hole size both in the nozzle and venturi which allows different amounts of water or pressure. Most single-stage horizontal pumps can go between 40-100 feet down. Back in the 30s, this was amazing. When you add more stages, you also allow for a deeper depth to water. Remember, the deeper you go the less water you get, but it still works. In today’s world, jet pumps are used more for booster applications, but there are those who still want the ability to work on their own pump before they have to call someone. Remember, do-it-yourselfers are not your competition, they are your customers. Bill Bill Corey may be contacted via e-mail to michele@worldwidedrillingresource.com Pipe Threader Does the Job The full-featured, high-performance Model 6590 pipe threading machine from Wheeler-Rex is capable of cutting, threading, and reaming pipe or tubing from 2½-6 inches outside diameter. Standard features include a powerful condenser motor with extremely quiet, two-speed operation. This workhorse also includes self-opening notch-type die heads, through the die-head oiling, blade-type cutter, three-stage oil fil- tration system, a five-flute reamer, foot switch, spare cutter wheel, four-leg stand, plus a three-year limited warranty. Optional acces- sories are also available for grooving and beveling. WorldWide Drilling Resource ® 7 APRIL 2017