Petrochina Company Limited

China Agricultural University

Sichuan Shengnuo Oil. and Gas Engineering Technology Service Co., Ltd

Sishui Lifeng Food Co., Ltd.

Xueqiang Wang

Yan Huang

Wei Zhou

Weilin Wang

Liang Zhao

Xuan Wang

Huiyun Ma

Xiaojun Liao

Yongtao Wang

Guanghua Li

Fengjing Sun

Yun Miao

Yukui Hong

Zonghao Dong

Daogang Cai

Hanbing Tang

Changqing Ye

Hao Tan

Hongyan Chen

Xiankui Kong

Provided is a method for precipitating a starch emulsion, the method including: mixing a fermentation broth with the starch emulsion, the fermentation broth including an isolated microorganism, wherein the isolated microorganism isWSJ-57 deposited under an accession number of CGMCC No. 19201 in the China General Microbiological Culture Collection Center on Dec. 20, 2019.

and use thereof in precipitating starch emulsion

The present invention discloses a permanent packer and an extended gas lift method using the permanent packer, the method comprising: S1. imbedding the extended gas lift embedded pipe when setting the permanent packer, wherein the extended gas lift embedded pipe has an upper end being closed and a lower end being open, is provided therein with a one-way valve through which the fluid can pass from top to bottom; S2. lowering a breaking device from the production casing when in the extended gas lift, to break the upper end of the extended gas lift embedded pipe such that the upper and lower ends of the extended gas lift embedded pipe are communicated; and S3. injecting gas into the production casing, lifting the accumulated liquid in the bottom hole to the ground surface, to complete the extended gas lift. The method does not affect the sealing property of the permanent packer, can fully adapt to the demand in the early and middle stages of gas well development, and meanwhile can realize extended gas lift without workover in the middle and later stages of gas well development, and has low implementation cost and good safety.

Permanent packer and extended gas lift method using permanent packer

Growing community of inventors

Beijing, China

Xueqiang Wang