Patent ID: 6293340
Filing Date: 2001-09-25
Classification: E21B

Abstract:
A gas-lift-ball control device, comprising an oil-gas-ball separator shell which is provided with a low pressure gas outlet on the top, an oil-gas-ball inlet on the upper portion and an oil outlet on the lower portion; a perforated spiral pipe which is disposed inside said shell and connected on one end with said oil-gas-ball inlet; a baffle provided in front of the other end of the perforated spiral pipe; a separating umbrella disposed above said perforated spiral pipe; and a filter screen disposed below said perforated spiral pipe, characterized in that a valve for sending out gas-lift-balls is arranged by the side of the filter screen and comprises a valve body having a ball inlet hole, a low pressure gas hole, a high pressure gas inlet hole and a high pressure gas outlet hole, and a valve core which is positioned in said valve body and controlled by an electric control unit, said high pressure gas inlet hole and said high pressure gas outlet hole being connected respectively with a high pressure gas inlet pipe and a high pressure gas outlet pipe, which extend through the shell wall to the outside; said valve core is provided therein with passage means for connecting said ball inlet hole and said low pressure gas hole and for connecting said high pressure gas inlet hole and said high pressure gas outlet hole alternatively; and a shift fork controlled by said electric control unit is disposed by the side of said ball inlet hole in said valve body.