Petrochina Company Limited

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

Huiyun Ma

Tao Yang

Qiang Li

Jiang Yu

Youzhi Zheng

Fuyun Wang

Libin Jiao

Qiyan Tan

Bin Wang

Qiang Fu

Yong Wu

Yan Huang

Wei Zhou

Weilin Wang

Jian Yang

Xiaodong Liu

Ting Ting Zhang

Kui Li

Xiaoli Zhao

Ji Chen

Yuan Jiang

Bo Kong

Jun Xie

Chenggang Yu

Xueqiang Wang

Yukun Fu

Qiang Yin

Dezheng Yi

Hao Tan

Haifeng Zhong

Changqing Ye

Minghua Xie

Hanbing Tang

Yanyan Liu

Yu Sang

Hongwei Xia

Daogang Cai

Zonghao Dong

Yukui Hong

Congjing Liu

Yun Miao

Fengjing Sun

Fenglin Guo

Yiguo He

Xiaojiao Wang

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

A downhole throttling device based on wireless control includes an inlet nozzle, a throttling assembly, an electrical sealing cylinder, a gas guide cylinder, a lower adapter sleeve, an end socket, a female sleeve, and electrical components. The inlet nozzle is connected to the throttling assembly, the throttling assembly is connected to the electrical sealing cylinder and the gas guide cylinder, the electrical sealing cylinder and the gas guide cylinder are both connected to the lower adapter sleeve, the lower adapter sleeve is respectively connected to the end socket and the female sleeve, and the electrical components are arranged in the electrical sealing cylinder. A throttling effect is achieved by detecting the temperature and pressure in a tube by a temperature/pressure sensor in the electrical components and controlling a motor to rotate a movable valve in the throttling assembly by a circuit control assembly, thereby achieving wireless control over downhole throttling.

Downhole throttling device based on wireless control

An apparatus and method for determining a volume stability of well cement including a reaction kettle, a radial contraction, an expansion ring, a heater, a pressurizer, and a volume change parameter tester. The radial contraction and expansion ring include a first casing and a second casing, the first casing is a casing made of elastic material, the second casing is a steel casing, and the first casing sheathes the second casing. The heater and the pressurizer are used to provide a preset temperature and a preset pressure respectively and the volume change parameter tester is used to detect a radial volume change parameter of the well cement. The apparatus is provided with the radial contraction and expansion ring to acquire the radial volume change parameter of the well cement, and comprehensively evaluates the volume stability of the well cement using the radial volume change parameter of the well cement.

Apparatus and method for determining volume stability of well cement

The invention provides a method and device for measuring the elasticity of hardened cement for cementing of oil-gas wells. The measurement method comprises: determining the loading and unloading rates of the hardened cement; determining the maximum loading on the hardened cement; determining the experimental temperature and the experimental pressure of the hardened cement; establishing a stress-strain curve for the hardened cement; and describing the elasticity of the hardened cement with the degree of strain recovery of the hardened cement in different cycles, and describing the mechanic integrity of the hardened cement with the degree of damage to the hardened cement in different cycles. The invention further provides a device for measuring the elasticity of hardened cement for cementing of oil-gas wells. The measurement method and device of the present invention provide a universal comparing platform for research on hardened cement modification as well as examination of domestic and foreign special cement slurry systems, which is of great significance in evaluation of well hole integrity and well life.

Method and device for determining elasticity of cement stone utilized in well cementing of oil-gas well

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Beijing, China

Huiyun Ma