Petrochina Company Limited

Qiyan Tan

Tao Yang

Qiang Li

Jiang Yu

Youzhi Zheng

Huiyun Ma

Libin Jiao

Fuyun Wang

Bin Wang

Qiang Fu

Yong Wu

Xiaoli Zhao

Ji Chen

Bo Kong

Fenglin Guo

Yiguo He

Xiaojiao Wang

Yu Sang

Minghua Xie

Hongwei Xia

Congjing Liu

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

Qiyan Tan