High-temperature high-pressure tensile stress strain system of oil well cement and test method thereof

Abstract

The invention relates to a high-temperature high-pressure tensile stress strain system of oil well cement. The system comprises a cement tensile test assembly, a power supply and pressure control unit, a temperature control unit, a signal control processing unit and pipelines. By adopting the system of the invention, the temperature and the pressure for the bottom maintenance can be simulated, the tensile stress strain of the oil well cement can be continuously measured under conditions of the temperature and the pressure, and the temperature pressure curve and the tensile stress strain curve are recorded. The system and the measure method of the invention are in favor of the intuitional test, the comparison of tensile resistances of different cement paste systems and the design of the cement paste formula, so cement paste systems which can satisfy on-site construction requirements are obtained.

Description

technical field

[0001] The invention belongs to the field of cement stone testing for oilfield cementing, and relates to a high-temperature, high-pressure tension-compression stress-strain system for oil well cement, which can simulate underground static condition maintenance and measure the tensile strength and tensile stress-strain of cement stone at different times. Background technique

[0002] In the prior art, there are few indoor test methods for the stress-strain tensile test and tensile strength of oil well cement stones. To a large extent, the test standards of the concrete industry are used for reference. The function of the measuring instrument is single, and there is no integrated equipment that can Measure the technical parameters such as the stretching of cement stone under the temperature and pressure of curing cement stone. Although the existing measuring equipment such as cement flexural / tensile tester can measure the tensile strength of cement stone, the co...

Examples

Embodiment Construction

[0061] figure 1 It is the high temperature and high pressure tensile stress and strain system diagram of oil well cement, in which: air compressor 1, pipeline system 2, pressure control unit 3, power supply 4, physical parameter control module panel 5, signal analysis control processing module 6, water source 7, output Pressure gauge 8, input pressure gauge 9, water source valve 10, high pressure output valve 11, pressure rate regulating valve 12, power switch 13, maintenance pressure hose 14, pressure head pressure hose 15, displacement sensor 16, thermocouple 17 , Heating kettle jacket 18, pressure regulating valve 39, heating kettle jacket hole 43, oil well cement high temperature and high pressure tensile stress strain gauge 44, and operating table 45.

[0062] The power supply 4 is connected to the pressure control unit 3, the oil well cement high temperature and high pressure tensile stress strain gauge 44, and the signal analysis control processing module 6; the air com...

technical field

[0001] The invention belongs to the field of cement stone testing for oilfield cementing, and relates to a high-temperature, high-pressure tension-compression stress-strain system for oil well cement, which can simulate underground static condition maintenance and measure the tensile strength and tensile stress-strain of cement stone at different times. Background technique

[0002] In the prior art, there are few indoor test methods for the stress-strain tensile test and tensile strength of oil well cement stones. To a large extent, the test standards of the concrete industry are used for reference. The function of the measuring instrument is single, and there is no integrated equipment that can Measure the technical parameters such as the stretching of cement stone under the temperature and pressure of curing cement stone. Although the existing measuring equipment such as cement flexural / tensile tester can measure the tensile strength of cement stone, the co...

Examples

Embodiment Construction

[0061] figure 1 It is the high temperature and high pressure tensile stress and strain system diagram of oil well cement, in which: air compressor 1, pipeline system 2, pressure control unit 3, power supply 4, physical parameter control module panel 5, signal analysis control processing module 6, water source 7, output Pressure gauge 8, input pressure gauge 9, water source valve 10, high pressure output valve 11, pressure rate regulating valve 12, power switch 13, maintenance pressure hose 14, pressure head pressure hose 15, displacement sensor 16, thermocouple 17 , Heating kettle jacket 18, pressure regulating valve 39, heating kettle jacket hole 43, oil well cement high temperature and high pressure tensile stress strain gauge 44, and operating table 45.

[0062] The power supply 4 is connected to the pressure control unit 3, the oil well cement high temperature and high pressure tensile stress strain gauge 44, and the signal analysis control processing module 6; the air com...

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