Portable gas lift flowing back reservoir protection speed tubular column

The utility model provides a portable gas lift flowing back reservoir protection speed tubular column, set up the speed tubular column in oil pipe including movable to and from the top down sets gradually multistage gas lift valve and unilateral control packer on the speed tubular column, the unilateral control packer be used for when the gas lift clearance between sealed speed tubular column andthe oil pipe, and provide intercommunication unilateral control packer upper and lower parts's gas - liquid channel after high -pressure gas pours into the gas well into. The utility model discloses tubular column no longer fixed mounting is blocked high -pressure gas -liquid and is poured into the gas -bearing formation into to the pit shaft in when the gas injection, avoid reservoir pollution, realizes sealed to gas - liquid channel during the gas lift, realizes the promotion of liquid. Its simple structure, application scope is wide, and each part can bear the high pressure, is applicable to to work in deep well or