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Device and method for testing liquid-plastic-solid three-state volume change in cement hydration process

A technology of volume change and cement hydration, applied in measuring devices, instruments, scientific instruments, etc., can solve the problem of inability to test liquid-plastic-solid three-state volume change, plastic shrinkage of cement paste and shrinkage of hardened body without reliable testing methods, inability to Identify problems such as volume shrinkage of cement slurry to ensure accuracy and continuity

Active Publication Date: 2020-05-29
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After many years of research and development, great progress has been made in cement slurry volume shrinkage testing devices at home and abroad (for example: Wang Xiaojing. A kind of high temperature and high pressure volume expansion and contraction tester for oil well cement: CN102928578A, Li Ning. Cementing cement slurry volume change test Instrument and test method: CN103245773A, Zhang Hua. Volume expansion and contraction rate test device: CN205138938U etc.), although these devices can realize the measurement to the cement slurry volume shrinkage, can't distinguish liquid state, plastic state, three phases of solid state cement slurry Volume shrinkage. At present, there is no reliable test method for cement slurry plastic shrinkage and hardened body shrinkage, and it is impossible to accurately and effectively test the liquid-plastic-solid three-state volume change during the cement slurry hydration process.

Method used

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  • Device and method for testing liquid-plastic-solid three-state volume change in cement hydration process
  • Device and method for testing liquid-plastic-solid three-state volume change in cement hydration process
  • Device and method for testing liquid-plastic-solid three-state volume change in cement hydration process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] The implementation process of the cement slurry volume change test containing expansion agent 1 is as follows:

[0071] 1. Install the bottom cover 7 on the lower end surface of the slurry cup through the bottom thread of the slurry cup, install the longitudinal wave emitter 15, the shear wave emitter 17, and the in-coupling temperature sensor 8 on the bottom cover 7 through the sealing ring, and the three are all connected with each other. If the cement slurry is in direct contact, a layer of high-temperature-resistant lubricating oil can be coated on the surface for easy disassembly.

[0072] 2. Prepare the cement slurry system containing expansion agent 1 according to the formula requirements, then pour it into the h1 cm scale inside the slurry cup, install the top cover 1 on the upper end surface of the slurry cup through the top thread of the slurry cup, and install the longitudinal wave receiver 16, shear The wave receiver 18 is installed on the top cover 1 throug...

Embodiment 2

[0083] The implementation process of the cement slurry volume change test containing expansion agent 2 is as follows:

[0084] 1. Install the bottom cover 7 on the lower end surface of the slurry cup through the bottom thread of the slurry cup, install the longitudinal wave emitter 15, the shear wave emitter 17, and the in-coupling temperature sensor 8 on the bottom cover 7 through the sealing ring, and the three are all connected with each other. If the cement slurry is in direct contact, a layer of high-temperature-resistant lubricating oil can be coated on the surface for easy disassembly.

[0085] 2. Prepare the cement slurry system containing expansion agent 2 according to the formula requirements, then pour it into the h1 cm scale inside the slurry cup, install the top cover 1 on the upper end surface of the slurry cup through the top thread of the slurry cup, and install the longitudinal wave receiver 16, shear The wave receiver 18 is installed on the top cover 1 throug...

Embodiment 3

[0096] The implementation process of the cement slurry volume change test containing expansion agent 3 is as follows:

[0097] 1. Install the bottom cover 7 on the lower end surface of the slurry cup through the bottom thread of the slurry cup, install the longitudinal wave emitter 15, the shear wave emitter 17, and the in-coupling temperature sensor 8 on the bottom cover 7 through the sealing ring, and the three are all connected with each other. If the cement slurry is in direct contact, a layer of high-temperature-resistant lubricating oil can be coated on the surface for easy disassembly.

[0098] 2. Prepare the cement slurry system containing expansion agent 3 according to the formula requirements, and then pour it into the h1 cm scale inside the slurry cup, install the top cover 1 on the upper end surface of the slurry cup through the thread on the top of the slurry cup, and install the longitudinal wave receiver 16, shear The wave receiver 18 is installed on the top cov...

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Abstract

The invention provides a device for testing liquid-plastic-solid three-state volume change in the cement hydration process. The device comprises a sealing paste cup for containing cement paste, wherein a shear wave collecting device used for collecting cement paste shear waves , a longitudinal wave collecting device used for collecting longitudinal waves of the cement paste, a pressure control system used for controlling pressure in the sealing paste cup, a volume collecting system used for measuring volume change of the cement paste in the sealing paste cup, and a heating measuring device used for heating the cement paste are mounted on the sealing paste cup, and the shear wave collecting device, the longitudinal wave collecting device, the pressure control system, the volume collecting system and the heating measurement device are connected with a computer system. The device is advantaged in that not only can volume variation of the cement paste in three stages of liquid state, plastic state and solid state be accurately metered, but also a stage in which expanding agent mainly acts on volume shrinkage of the cement paste can be conveniently monitored, which is of great significance to evaluation and optimization of the expanding agent.

Description

technical field [0001] The invention relates to the technical field of petroleum drilling and cementing engineering, in particular to a testing device and method for volume change of three states of liquid, plastic and solid during the cement hydration process. Background technique [0002] During well cementing construction, cement slurry is filled in the annular space between the casing and the wellbore, and the cement sheath formed after solidification supports the well wall, protects the casing, and seals off the oil, gas and water layers. Usually, the cement slurry itself will shrink in volume, which will lead to the failure of cement sheath cementation quality in the later stage, causing problems such as interlayer channeling and annular pressure. By monitoring the time-varying process of cement slurry volume shrinkage, it is of great significance to reasonably develop the expansion cement slurry system and solve the problem of cement slurry volume shrinkage. After ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/38
CPCG01N33/383
Inventor 刘健薛元陶李早元黄盛程小伟郭小阳宋伟涛
Owner SOUTHWEST PETROLEUM UNIV
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