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Cement sheath structural integrity mechanics experiment device

A technology of integrity mechanics and experimental equipment, applied in the direction of construction, etc., to achieve the effect of automatic temperature adjustment, easy operation and small volume

Active Publication Date: 2014-01-08
NORTHEAST GASOLINEEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the actual cementing project, the interface bond strength value is different from the original uniaxial shear strength, and the existing experimental equipment cannot complete the measurement of the interface bond strength under actual working conditions.

Method used

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  • Cement sheath structural integrity mechanics experiment device
  • Cement sheath structural integrity mechanics experiment device
  • Cement sheath structural integrity mechanics experiment device

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] Below in conjunction with accompanying drawing, the present invention will be further described:

[0021] Such as figure 1 As shown, the cement sheath structural integrity mechanical experiment device is composed of a cement sheath curing mold 36 and a triaxial stress curing kettle. The cement sheath curing mold 36 is set in the inner cavity 24 of the triaxial stress curing kettle. The formed assembly cured from the cement ring curing mold was placed in a triaxial stress curing kettle and fixed for experimental measurement. The shear bond strength of the bonded interface is assisted in the test with the help of related equipment.

[0022] Such as figure 2 As shown, the cement sheath maintenance mold includes an adjustable eccentric upper flange cover 2, a simulated well wall 4, a simulated well wall outer casing 3, a casing 1, an adjustable eccentric lower flange 8, and a simulated well wall outer casing 3 The casing is placed outside the simulated well wall 4, and ...

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Abstract

The invention relates to a cement sheath structural integrity mechanics experiment device which is composed of a cement sheath maintenance die and a three-shaft stress maintenance kettle. The cement sheath maintenance die is arranged inside an inner cavity of the three-shaft stress maintenance kettle. The cement sheath maintenance die comprises an adjustable eccentricity upper flange cover, a simulation well wall, a simulation well wall outer protective barrel, a casing pipe and an adjustable eccentricity lower flange plate. The three-shaft stress maintenance kettle comprises a barrel-shaped container, a confining pressure oil cylinder, an oil cylinder piston, an axial load piston, a confining pressure piston, an annular heating element and an electrode. The confining pressure piston is arranged inside the barrel-shaped container, the confining pressure oil cylinder is arranged on the upper end face of the barrel-shaped container in a sitting mode, a silicone oil cavity is formed between the confining pressure oil cylinder and the oil cylinder piston, an axial load sensor is connected with the axial load piston, a pressing machine upper plate is arranged at the upper end of the axial load sensor, the annular heating element is arranged inside the barrels-shaped container, the lower end face of the annular heating element presses the electrode, and the annular heating element is connected with a thermoelectric coupler. The cement sheath structural integrity mechanics experiment device can simulate the actual working condition of the oil-gas well construction, and the measured cement strength of a cement interface conforms to the actual site work better and more accurately.

Description

1. Technical field: [0001] The present invention relates to an experimental device for detecting the stress, strain, failure load and law of the casing, cement sheath, simulated well wall and their contact interfaces under complex loads in the field of petroleum engineering cementing, and specifically relates to a A cement sheath structure integrity mechanics experiment device. 2. Background technology: [0002] In the cementing engineering of oil and gas wells, the casing and the formation are cemented together through the chemical bonding force and interface mechanical contact force formed by the coagulation and hardening of the oil well cement slurry, thus forming a casing-cement sheath-formation combination. body, supporting and sealing the casing and formation. Under the action of external load, the mechanical response and structural integrity of the casing and cement sheath assembly will depend on the mechanical properties and interface bonding conditions of the casin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/005
Inventor 张景富李玮张聪李思琪张德兵赵静茹
Owner NORTHEAST GASOLINEEUM UNIV
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