| 摘要 |
A double acting artificial lift system for use in a wellbore having two chambers, each having an inlet and outlet; a power gas string connected to both chambers; a liquid string connected to the outlets of both chambers; a vent connected to each chamber for selectively allowing a gas to pass outwardly of the chamber; and a double acting valve connected to the power gas string and the vents. The valve alternately allows the pressurized gas into each chamber, while venting the other chamber. The pressurized gas enters the chambers to cause any liquid in the chambers to pass through the outlet and into the liquid string such that the liquid extends continuously along the entire length of the liquid string. The venting allows the chambers to fill with liquid from the wellbore. |
