1. Why does this work?

2. How long will it last?

3. What is the maximum gas/oil ratio?

4. Why will it assist in pumping heavy crude?

5. Why can you guarantee near 100% efficiency?

6. Why don't you need a sliding sleeve or a two stage pump?

7. Why does it help when pumping in sand?

8. Will it de-water a gas well?

9. Why will it increase production?

1) Q: Why does this work?
A: The valve contains three simple tools that work together to convert the natural pressure within your pump in the downstroke to a force that moves the actuator and physically opens the traveling valve. The first of these simple tools is a hydraulic amplifier. By itself alone, it increased the force applied to open the traveling valve ball by a factor of six. This is then used to drive a lever, which then operates an inclined plane that makes rolling contact with the ball, rolling it open. With force increases of from 50: 1 to 100:1, depending upon the model and size of the valve, very small forces in the pump(seen at the early stages of the downstroke) are converted to large forces to open the traveling valve. This happens even when gas is in the pump, since hydraulic amplifiers operate the same way in any fluid, regardless of whether the fluid is liquid or whether it is gas..

2) Q: How long will it last?

A: We have reports of 3 1/2 years without a pump pull. The longevity depends on the well conditions. We consistently increase the time between pump pulls. By allowing the ball to open and close on each and every stroke, dynamic forces are reduced on each stroke which leads to longer pump service. Since the valve open on the downstroke, spray from the produced fluid above he plunger lubricates below the plunger and has shown to operate with fluid level at the seating nipple without damage. THIS IS A TRUE PUMPED OFF CONDITION.

Corrosion is accelerated under high stress conditions. With the DARTT® Valve installed, stresses on pump parts are dramatically reduced and leads to longer pump, sucker rod, and tubing life; i.e., increased time between pump pulls.

3) Q: What is the maximum gas/oil ratio? 

A: The DARTT® Valve will allow the pump to pump 100% gas; however, most wells are put on a time clock to save electrical costs after the liquid level is lowered to the seating nipple.

4) Q: Why will it assist in pumping  heavy crude?

The installation of a DARTT® Valve backs up the traveling valve in operation. When the traveling valve has floated off the seat in the heavy crude and the pump is in the up stroke, the Darttā Valve performs the job of closing the bottom of the plunger so that more crude can be sucked into the pump through the standing valve. Also, when the surface tension of the heavy crude has practically glued the traveling ball to its seat and the pump is in the downstroke, the Darttā Valve forces the traveling valve to open. Thus the installation of a Darttā Valve increases production and, in some wells, makes production possible where it would be impossible without the DARTT® Valve.

5) Q: Why can you guarantee near 100% efficiency?

A: By opening and closing the traveling valve at the proper time, the effective stroke length downhole at the pump tends to be increased to its maximum. In the consistent operation, efficiencies approach 100% downhole until the liquid level is lowered to the seating nipple.

6) Q: Why don't you need a sliding sleeve or a two stage pump?

A: The DARTT® Valve will eliminate the gas lock on the ball that is actuated. Gas lock could occur with sliding sleeve and other two stage pump balls. We recommend one traveling valve cage with a DARTT® Valve attached to allow the pump to perform at expectations.

7) Q: Why does it help when pumping in sand?

A: The natural operation of the DARTT® Valve actuator as it lifts the traveling ball from its seat with an inclined plane causes the ball to pivot and to spin more in the vertical direction. This vertical spinning helps to keep heavies like sand in suspension. But even more importantly, one of the true beauties of theDARTT® Valve is that it causes fluid to flow on every stroke, not giving sand a chance to become embedded in the sealing surface between the ball and seat. The DARTT® Valve actuator action works on every stroke to help keep the pump from plugging with sand.

8) Q: Will it de-water a gas well?

A:. A common practice in the Oil & Gas industry is to: "Kill a well, fill it with salt water". Then the well can be worked on. Logic dictates that the reverse is true. "To produce all of the gas possible from a well, remove all of the salt water from the well, and expose the formation to the empty well."

In gas wells, it has been observed that high levels of water frequently exist within the wells. Any water above the seating nipple reduces the quantity of gas which can be produced. We have noted that a water level reduction of only ten feet can make dramatic increase in gas production. These high levels of water are frequently required because of the fluid pound which exists when attempts are made to pump the water to lower level. This is because of the great quantity of gas within the water. The addition of a DARTT® Valve to a pump allows an operator to pump all of the water from the well right down to the seating nipple with no fluid pound problem. In all wells reviewed after installing the DARTT® Valve, relieving the pressure on the formation has resulted in marked increases in gas production. THIS SYSTEM CAN BE TIME CLOCKED FOR POWER SAVINGS WITHOUT FEAR OF GAS LOCK WHEN THE PUMP STARTS BACK UP.

9) Q: Why will it increase production?

A: It has been observed that, in an effort to minimize flash-gas and the resulting fluid pound, it has been the practice of most operators to maintain a level of fluid within the well to the 300-500 feet range. The actual level is frequently dictated by the pump-off controller which shuts down the well upon sensing fluid-pound vibration. The problem is that although is then shut down, the well is not really not pumped off. Worse, the high level of fluid left in the well presents hydrostatic pressure against the formation, hampering the formation from delivering its fluid to the well.

When one installs a DARTT® Valve into the pump, fluid pound is eliminated and the tight-valving of the DARTT® Valve system literally sucks all fluid in the well into the pump. Thus, pumping right down to the seating nipple is possible and becomes the normal mode of operation when using the DARTT® Valve. In most wells reviewed after installing the DARTT® Valve, relieving the pressure on the formation has resulted in increased fluid production.

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