Variable speed supercharge oil well cement consistometer and thickening time measuring method thereof

A technology of oil well cement slurry and measurement method, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems that the consistency and thickening time of oil well cement slurry do not conform to the actual situation in the well, and achieve the effect of improving the cementing performance

Inactive Publication Date: 2005-01-26
SOUTHWEST PETROLEUM UNIV
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  • Claims
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Problems solved by technology

[0004] In order to overcome the deficiencies in the existing cementing operation technology and solve the problem that the measured consistency and thickening time of oil well cement slurry do not match the actual situation downhole, a variable speed pressurized oil well cement slurry consistency meter and its thickening How time is measured

Method used

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  • Variable speed supercharge oil well cement consistometer and thickening time measuring method thereof
  • Variable speed supercharge oil well cement consistometer and thickening time measuring method thereof
  • Variable speed supercharge oil well cement consistometer and thickening time measuring method thereof

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specific example

[0032] 1. Prepare four kinds of oil well cement slurries with different properties according to the API standard, and their densities are about 1.40 and 1.90 (see Table 2);

[0033] 2. According to the well depth of 2000-4000m, set the experimental temperature and pressure of oil well cement slurry (Table 2);

[0034] 3. according to 150RPM of API standard and selected 70,100,300RPM in addition, use variable-speed pressurized type consistency meter of the present invention, record the thickening curve and the thickening time of oil well cement slurry (see attached Figure 2-5 ,Table 2).

[0035] serial number

density

temperature °C

pressure MPa

Cup speed RPM

70

(100)

150

300

1

1.90

112

76.4

2:57

2:27

2:04

2

1.89

96

60

(6:56)

5:40

3:50

3

1.905

96

60

3:50

3:08...

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Abstract

This invention relates to a method for better simulating and measuring mud thickness and thickening time. And it solves the problem of discrepancy between the measured mud thickness and thickening time and the real situation. And it employs a supercharged consistometer with variable speed, and plasm cup rotary speed is infinite and its rotary speed ranges from ten to six hundred round per minute. The method is the following: first to determine the shearing circum-space speed according to injecting speed of mud plasm and theological characteristic of the oil well, then to determine the average shearing force and speed when consistometer special paddle rotates; finally to confirm the mud plasm thickening time and paddle stimulating speed. This invention can ensure the safety construction of oil well casing and cementing and the quality of well wall concretion and agglutination.

Description

Technical field: [0001] The invention relates to a method capable of better simulating and measuring the consistency and thickening time of oil well cement slurry under different well depths and different injection speeds and shear rates. It is suitable for oil and natural gas drilling, cementing, cement extrusion, cement plugging and other operations. Background technique: [0002] In oil and natural gas exploration and drilling, after drilling thousands of meters deep, consolidation and isolation of the well wall to prevent rock collapse in the well is a key technical issue to increase the life of oil and gas wells and improve the production capacity of oil and gas wells. The technical terms of consolidation and isolation of the well wall are collectively referred to as cementing engineering. The cementing project is to put the casing into the well, then inject the oil well cement slurry into the inner hole of the casing, replace it to the annular space outside the casing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N11/14
Inventor 刘崇建陈英刘孝良谢应权
Owner SOUTHWEST PETROLEUM UNIV
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