Recently, the successful application of the new gas lift technology combined with sliding sleeve and gas lift valve in Chuandongchi 22 well resumed production in early September, with a daily output of 250,000 cubic meters of natural gas. The well of Well 22 is a main producing gas well lurking in the high-end dry-well structure of Mudanchang in East Sichuan and has a total output of 1.24 billion cubic meters of natural gas. In view of the low formation pressure (23 MPa) in the well and the deep middle layer (4364 m) in the pay zone, it is necessary to recover the production by gas drainage. The gas recovery engineering institute of the Southwest Oil and Gas Field Company boldly adopts conventional gas lift valve and import VXD cycle slip sleeve combination of the new technology so that the gas lift sleeve is always open for gas lift valve work drainage, closing the sleeve after the completion of drainage production. The successful application of this technology has provided a powerful measure for the technological breakthrough of high pressure deep well drainage in the Carboniferous in eastern Sichuan and will become a new gas lift technology.
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