What is the maximum gas/oil ratio?
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? A: In most heavy crude production, conventional balls float off their seats as if suspended in a weightless environment, thus preventing the pump from loading during the up stroke. Further, in crudes having gravities 10-18, problems have been recorded of the traveling valve at times sticking closed due to the surface tension between the ball and seat. While these problems, when viewed from the surface, seem to indicate gas lock, what is actually happening within the pump is the exact opposite of gas lock. Only the symptoms are the same. 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 Dartt Valve performs the job of closing the
