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Method for measuring settlement stability of pad fluid or post-pad fluid for well cementation

A cementing prefluid and measurement method technology, applied in the direction of measuring devices, specific gravity measurement, instruments, etc., can solve the problems of low data accuracy, large waste, and potential safety hazards, and achieve convenient disassembly and cleaning, and simple device structure , the effect of broad application prospects

Active Publication Date: 2015-11-11
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the process of cementing and well completion, the settlement stability of the pre-cementing and post-cementing fluid directly affects the quality of cementing; Normal implementation, in severe cases, it will lead to cementing failure
[0003] At present, there are many measurements of cement slurry settlement stability. According to the requirements of GB / T19139-2012, it is necessary to measure after the cement slurry has solidified. Settlement stability measurement according to the method in the standard GB / T19139-2012
The existing devices for evaluating the settlement stability of the pre-fluid or post-fluid are usually measuring cylinders, disposable PVC pipes, waste fluorescent lamp tubes, glass tubes and other utensils. After a certain period of time, pipetting tools such as straws are used for auxiliary measurement, but this cannot be achieved when the viscosity is high, and the accuracy of the data is low; Internal solids, the method of segmented measurement, the measurement method is cumbersome, there are potential safety hazards, and there is a lot of waste

Method used

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  • Method for measuring settlement stability of pad fluid or post-pad fluid for well cementation
  • Method for measuring settlement stability of pad fluid or post-pad fluid for well cementation
  • Method for measuring settlement stability of pad fluid or post-pad fluid for well cementation

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Such as Figure 1~2As shown, a pre-fluid or post-fluid settlement stability measurement device for cementing includes a simulated wellbore body 1, a top cover 3, a bottom cover 4, and a plug 7, wherein the length of the simulated wellbore body 1 is 800mm , with an inner diameter of 50.00mm, an outer diameter of 60mm, and a wall thickness of 5.00mm; the top cover 3 and the bottom cover 4 are respectively inserted into the upper and lower ends of the simulated shaft body 1 and threaded (the upper top The length of the threads processed inside the cover and the lower bottom cover are both 10mm) are detachably fixedly connected to the simulated shaft body 1, and the top end of the top cover 3 and the bottom end of the bottom cover 4 are all processed into Hexagonal structure, and the outer diameter of the hexagonal structure is larger than the outer diameter of the side walls of the top cover 3 and the bottom cover 4, and two annular wrench grooves 6 are formed on the outer...

Embodiment 2

[0045] Through the cementing pre-fluid or post-fluid settlement stability measuring device of embodiment 1, a kind of pre-fluid, specifically a kind of cementing test experiment of aggravated spacer fluid settlement stability

[0046] S1. Configure a weighted spacer and measure the density of the weighted spacer to be 1.50g / cm 3 , before the test, the weighted spacer was placed in an atmospheric thickener, and stirred and maintained at 27°C for 30 minutes. maintenance;

[0047] S2. Assemble the settlement stability measurement device, and ensure that all discharge gates 2 are closed, wherein the specific structure of the settlement stability measurement device is as described in Example 1.

[0048] S3. Slowly pour the cured weighted spacer fluid into the settlement stability measuring device and stir with a glass rod to drive out the air bubbles, and install and fix the top cover 3 on the simulated shaft body 1;

[0049] S4, put the weighted spacer liquid in the settlement s...

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Abstract

The invention discloses a method for measuring settlement stability of a pad fluid or a post-pad fluid for well cementation. The method is realized through a device for measuring settlement stability of the pad fluid or the post-pad fluid for well cementation; the settlement stability of the pad fluid or the post-pad fluid, with different density and different standing time, for well cementation is measured; and the measurement of settlement stability of the pad thick fluid or the post-pad thick liquid, with different characteristics, different density and different standing time, under the well for well cementation can be effectively simulated. The device is simple in structure, is convenient for disassembly and cleaning, and can be reused. The device is convenient and efficient to operate, so the construction cost is reduced. Measurement and evaluation system is much closer to the actual engineering. The method is strong in comparability, simple to operate, and wide in application range. The data of single-group settlement stability can be measured and predicted, and a tendency chart of settlement stability can be drawn according to different standing time. Judgment basis of reliable annular pressure data for well cementation is provided, and the method has a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of cementing fluid settlement stability detection, and in particular relates to a method for measuring the settlement stability of pre-fluid or post-fluid for well cementing. Background technique [0002] In the process of cementing and well completion, the settlement stability of the pre-cementing and post-cementing fluid directly affects the quality of cementing; Normal implementation will lead to cementing failure in severe cases. [0003] At present, there are many measurements of cement slurry settlement stability. According to the requirements of GB / T19139-2012, it is necessary to measure after the cement slurry has solidified. The settlement stability measurement was carried out according to the method in the standard GB / T19139-2012. The existing devices for evaluating the settlement stability of the pre-fluid or post-fluid are usually measuring cylinders, disposable PVC pipes, waste fluorescent lam...

Claims

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Application Information

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IPC IPC(8): G01N9/36
Inventor 马作朋孙勤亮付家文刘文明林志辉王芳
Owner BC P INC CHINA NAT PETROLEUM CORP
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