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Cement slurry clearance measuring assembly

A technology for cement slurry and channeling measurement, applied in construction and other directions, can solve the problems of cumbersome test operation, deviation of test results, inability to effectively simulate the actual situation, etc., and achieve the effect of avoiding gas channeling test errors and ensuring accuracy.

Active Publication Date: 2018-06-05
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current test device has the following disadvantages: the device structure is complex, the test operation is cumbersome, the actual situation cannot be effectively simulated, and the test results have large deviations.

Method used

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  • Cement slurry clearance measuring assembly
  • Cement slurry clearance measuring assembly
  • Cement slurry clearance measuring assembly

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Embodiment 1 of the present invention provides a gas channeling simulation test device, which includes a heating cylinder and two cement slurry channeling measurement components arranged inside the heating cylinder; wherein, one of the two cement slurry channeling measurement components can be used as a gas channeling The gas channeling tube in the simulation test device, and the other can be used as the weightlessness tube in the gas channeling simulation device to cooperate together to complete the corresponding gas channeling simulation test operation.

[0046] Such as figure 1 As shown, the above gas channeling simulation test device may include a gas channeling tube 1 for measuring the gas channeling process of cement and a weight loss tube 2 for measuring the hydrostatic column pressure of cement; wherein, the gas channeling tube 1 and the weight loss tube 2 are all set In the heating cylinder 3, both the gas channeling tube 1 and the weightlessness tube 2 are pro...

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PUM

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Abstract

The invention discloses a cement slurry clearance measuring assembly. The assembly comprises a connecting rod and an inner sleeve; the connecting rod is disposed in the inner sleeve, and the inner wall of the inner sleeve and the connecting rod form an annular cavity body; a first flange end cover is connected to the bottom end of the inner sleeve, a second flange end cover is connected to the topend, and the two ends of the connecting rod respectively penetrate the first flange end cover and the second flange end cover; a first cement slurry input port and a first gas input port are formed in the first flange end cover, a pressure detecting port is formed in the second flange end cover, and the first cement slurry input port, the second gas input port and the pressure detecting port areall communicated with the annular cavity body.

Description

technical field [0001] This application relates to but not limited to the technical field of oil well supporting equipment, especially a cement slurry channel testing component and testing method. Background technique [0002] During the curing stage after cement injection, the upward channeling of high-pressure gas is the main problem in gas well cementing. [0003] The main reasons for gas channeling are as follows: 1. The replacement efficiency of the cement sheath is low during cementing, forming channeling channel entrained by mud. Quality problems lead to poor bonding quality between cement and casing or formation cementing surface in the annular space, and gas leaks along the annular gap; 3. During the construction process, the total pressure of the cement slurry column and the mud column is less than the pressure of the gas layer. That is, "weight loss of cement slurry" forms air channeling; among them, the reasons for the weight loss of cement slurry are: the cemen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/005
CPCE21B47/005
Inventor 齐营罗宇维赵琥刘海轩宋茂林于斌冯颖韬
Owner CHINA NAT OFFSHORE OIL CORP
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