CN112461721A - Detection method for measuring stability of oil well cement by ultrasonic waves - Google Patents
Detection method for measuring stability of oil well cement by ultrasonic waves Download PDFInfo
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- 239000004568 cement Substances 0.000 title claims abstract description 148
- 238000001514 detection method Methods 0.000 title claims abstract description 58
- 239000003129 oil well Substances 0.000 title claims abstract description 12
- 238000004062 sedimentation Methods 0.000 claims abstract description 37
- 238000000034 method Methods 0.000 claims abstract description 30
- 238000012360 testing method Methods 0.000 claims abstract description 14
- 239000002002 slurry Substances 0.000 claims description 55
- 238000003756 stirring Methods 0.000 claims description 30
- 238000010438 heat treatment Methods 0.000 claims description 27
- 230000008719 thickening Effects 0.000 claims description 27
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- 238000002347 injection Methods 0.000 claims description 14
- 239000007924 injection Substances 0.000 claims description 14
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- 230000015572 biosynthetic process Effects 0.000 claims description 6
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- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 3
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- 238000010276 construction Methods 0.000 claims description 3
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/02—Analysing fluids
- G01N29/024—Analysing fluids by measuring propagation velocity or propagation time of acoustic waves
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- G—PHYSICS
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- G01N33/38—Concrete; Lime; Mortar; Gypsum; Bricks; Ceramics; Glass
- G01N33/383—Concrete or cement
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/024—Mixtures
- G01N2291/02416—Solids in liquids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
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Abstract
The invention discloses a detection method for measuring the stability of oil well cement by ultrasonic waves, and relates to the technical field of cement tests. The invention sets a plurality of ultrasonic transmitting and receiving components along different heights of the cement paste cylinder, detects the transmission speed of ultrasonic waves in cement paste of different intervals and acquires the relevant information of the sedimentation stability of the cement paste; the method can also detect the influence of the cement paste sedimentation stability on the strength development of the set cement, and dynamically detect the sedimentation stability of the whole process of the cement paste and the influence of the sedimentation stability on the mechanical property of the set cement in real time.
Description
Technical Field
The invention relates to the technical field of cement tests, in particular to a detection method for measuring the stability of oil well cement by ultrasonic waves.
Background
The sedimentation stability of the cement paste has great influence on the well cementation quality of oil and gas wells, the cement paste with poor sedimentation stability can generate a layering phenomenon, a large amount of free liquid is generated, and great harm is caused to annular sealing. When the layering phenomenon appears in the grout poor stability, form the passageway that oil, gas, water scurried easily, influence the packing effect of set cement, the mechanical properties that the cement granule subsides simultaneously and can lead to the set cement ring distributes unevenly, and the pressure transmits along the weak point direction of intensity under the high pressure environment in the well, probably destroys the integrality of set cement ring, causes the damage of sheathed tube even. Therefore, it is very important to comprehensively and accurately evaluate the settling stability of the cement slurry.
For the detection of the sedimentation stability of the oil well cement, the method specified by domestic and foreign standards comprises the following steps: and (2) preparing cement paste according to the standard specification requirement, filling the cement paste into a settling pipe, curing for 24h or taking out after solidification under a certain condition, cutting and weighing according to the specification, calculating the relative density of the set cement by using the Archimedes principle, and evaluating the stability of the cement paste. The literature discloses a new method for evaluating the sedimentation stability of cement paste, and designs a micro-pressure fluctuation tester for testing the sectional pressure of the cement paste under the action of filtration loss-sedimentation coupling, so as to calculate the density difference of the paste and evaluate the sedimentation stability of the cement paste. The invention patent of application No. CN202010402482.9, entitled "device and method for evaluating sedimentation stability of well cementation cement slurry in real time", discloses a device for evaluating sedimentation stability of well cementation cement slurry in real time, which consists of a kettle body, a top cover, a pressure tube head, a kettle body bracket, a central shaft, a supporting base, a worm and gear speed reducer, a handle, a heating assembly, a thermocouple, a pressure sensor and a control box, wherein a computer system acquires hydrostatic pressure of cement slurry in the kettle body in real time during an experiment, and the sedimentation stability of the cement slurry is evaluated by observing the change of the hydrostatic pressure of the cement slurry. The above method is greatly affected by the accuracy of the pressure sensing apparatus.
Disclosure of Invention
In order to overcome the defects and shortcomings in the prior art, the invention provides a detection method for measuring the stability of oil well cement by ultrasonic waves, and aims to solve the problems that the existing detection method for the sedimentation stability of cement paste is greatly influenced by the precision factor of pressure sensing equipment and the operation standard degree of operators. According to the detection method for measuring the stability of the oil well cement by using the ultrasonic waves, which is provided by the invention, the transmission speeds of the ultrasonic waves in the cement paste in different intervals are detected by arranging the plurality of ultrasonic wave transmitting and receiving assemblies along different heights of the cement paste cylinder, so that the relevant information of the settlement stability of the cement paste is obtained; the method can also detect the influence of the cement paste sedimentation stability on the strength development of the set cement, and dynamically detect the sedimentation stability of the whole process of the cement paste and the influence of the sedimentation stability on the mechanical property of the set cement in real time.
In order to solve the problems in the prior art, the invention is realized by the following technical scheme:
a detection method for measuring the stability of oil well cement by ultrasonic waves is characterized in that: the method comprises the following steps:
the method comprises the following steps of assembling an ultrasonic detection device, namely installing a bottom cover at the bottom of a slurry barrel, installing ultrasonic detection assemblies on the side wall of the slurry barrel, wherein the ultrasonic detection assemblies are provided with a plurality of groups, and the plurality of groups of ultrasonic detection assemblies are arranged along the slurry barrel at different heights and are used for detecting the ultrasonic propagation speed in the cement slurry in different sections in the slurry barrel; connecting a plurality of groups of ultrasonic detection assemblies with an ultrasonic detector; placing the pulp cylinder with the bottom cover and the ultrasonic detection assembly installed in a heating sleeve; connecting the heating sleeve with a temperature controller; respectively connecting the temperature controller, the ultrasonic detector and the driving controller with a main control computer;
preparing cement paste and thickening the cement paste, preparing the cement paste according to an experimental formula, and pouring the cement paste into the scale lines of the cement paste in the mortar barrel; assembling a top cover and a magnetic driving stirring assembly, and connecting the magnetic driving stirring assembly with a driving controller; turning on a power supply of the driving controller, and setting the rotating speed of the magnetic driving stirring assembly according to the actual cement slurry injection speed on site; turning on a power supply of a temperature controller, and setting a temperature rise program according to the temperature rise gradient of the cement slurry injected on site;
and (3) detecting the sedimentation stability of the cement paste, namely opening an ultrasonic detector after thickening is finished, setting ultrasonic detection frequency, operating a main control computer, controlling the ultrasonic detector to acquire ultrasonic propagation speed data in the cement paste of different sections in the pulp barrel, which is detected by a plurality of groups of ultrasonic detection assemblies, in real time, and detecting the sedimentation stability of the cement paste.
Furthermore, in the cement paste preparation and cement paste thickening steps, the thickening time is set according to the construction scheme of field cement injection, and the thickening time is the time required for the cement paste to start standing and setting after the cement paste is injected into the well bottom from the well head and returns to the designed height.
Furthermore, in the steps of preparing cement paste and thickening the cement paste, when the top cover is assembled, a gas injection joint is arranged on the top cover; during the densification step, gas at a set pressure is injected from the gas injection sub to simulate the downhole formation pressure.
The ultrasonic detection assembly comprises an ultrasonic transmitter and an ultrasonic receiver, the ultrasonic transmitter and the ultrasonic receiver are respectively arranged on two sides of the pulp barrel along the radial direction of the pulp barrel, and the ultrasonic transmitter and the ultrasonic receiver are positioned in the diameter direction of the pulp barrel; the multiple groups of ultrasonic detection assemblies are arranged along the axial direction of the pulp barrel and are positioned on the same axial plane.
The working frequency of the ultrasonic detection assembly is 50 kHz.
The ultrasonic detector is a CTS-25 nonmetal ultrasonic detector.
And the heating sleeve is provided with a temperature thermocouple, and the temperature thermocouple is connected with the temperature controller and feeds back the heating temperature to the temperature controller.
The magnetic driving stirring assembly comprises a stirring blade and a magnetic driving head, the upper end of the stirring blade is fixed by a top cover and is connected with the magnetic driving head, the lower end of the stirring blade extends into the blade cylinder, and the magnetic driving head rotates under the control of the driving controller.
And a pressure sensor is also arranged in the slurry barrel and used for feeding back the underground formation pressure simulated by gas injected into the slurry barrel through the gas injection joint to the main control computer.
Compared with the prior art, the beneficial technical effects brought by the invention are as follows:
1. the invention utilizes the corresponding relation that the wave velocity of the ultrasonic wave in the cement paste is closely related to the volume fraction of the total solid phase and the connected solid phase of the slurry, the ultrasonic wave emitting and absorbing devices are arranged at different heights of the cement paste cylinder, the change of the ultrasonic wave velocity in different intervals along with the setting time after the cement paste is injected into the shaft is detected, the relevant information of the cement paste sedimentation stability can be dynamically obtained in real time, and the result is quick and accurate. After the cement paste is solidified, the method can also continuously detect the development trend of the cement paste strength, analyze the influence of the cement paste sedimentation stability on the later-stage cement paste mechanical property, and preliminarily predict the integrity of the cement sheath.
2. The wave velocity of the ultrasonic wave in the cement paste is closely related to the volume fraction of the total solid phase of the cement paste and the connected solid phase, the solid phase in the cement paste provides a faster path for the propagation of the compression wave, when the sedimentation stability of a cement paste system is poor, the solid particles sink to the lower part, the ultrasonic wave is transmitted to different intervals of the cement paste for detection at the moment, the propagation velocity of the ultrasonic wave can be changed, the lower part wave velocity of the solid particle deposition is faster, the propagation velocity of the ultrasonic wave on the upper part of the cement paste is slowed down, and the propagation velocity of the ultrasonic wave can be increased by the crosslinking of hydration products along with the deepening of the hydration degree of the cement, and the ultrasonic wave is adopted to continuously monitor a sample, so that.
3. According to the invention, the structures of the slurry barrel, the top cover and the bottom cover are convenient to assemble and disassemble, and simultaneously, the cleaning of cement slurry in the slurry barrel is also convenient; ultrasonic wave detecting element's ultrasonic transmitter and ultrasonic receiver are located a thick liquid section of thick bamboo diameter direction and multiunit ultrasonic detecting element arranges along a thick liquid section of thick bamboo axial, and lie in the true data that can detect ultrasonic wave propagation velocity in this layer of grout on the same axial plane, detect more accurately, can effectively obtain the grout settlement stability condition on current layer through this ultrasonic wave propagation velocity.
Drawings
FIG. 1 is a schematic structural diagram of an ultrasonic testing apparatus provided in the present invention;
FIG. 2 is a schematic structural diagram of a pulp barrel in an ultrasonic testing device provided by the invention;
FIG. 3 is the low-density cement slurry sedimentation stability test result provided by experiment number 1-1 in example 1 of the present invention;
FIG. 4 is the low-density cement slurry sedimentation stability test result provided by experiment No. 1-2 in example 1 of the present invention;
FIG. 5 shows the results of testing the sedimentation stability of the conventional density cement slurry provided in experiment No. 2-1 of example 2 of the present invention;
FIG. 6 shows the results of testing the sedimentation stability of the conventional density cement slurry provided in experiment No. 2-2 of example 2 of the present invention;
FIG. 7 shows the results of testing the settling stability of high-density cement slurry provided by experiment number 3-1 in example 3 of the present invention;
FIG. 8 is the result of testing the settling stability of high-density cement slurry provided by experiment number 3-2 in example 3 of the present invention;
reference numerals: 1. the device comprises a pulp barrel, a bottom cover, a top cover, a magnetic driving stirring assembly, a heating sleeve, a temperature measuring thermocouple, a temperature controller, an ultrasonic receiver, a heating thermocouple, a temperature measuring thermocouple, a driving controller, a main control computer, a stirring paddle, a magnetic driving head, a magnetic driving stirring assembly, a heating sleeve, a heating thermocouple, a.
Detailed Description
The technical scheme of the invention is further elaborated by combining the drawings in the specification.
Example 1
The embodiment provides a method for detecting the stability of low-density cement slurry, which comprises the following steps:
the method comprises the following steps of assembling an ultrasonic detection device, namely installing a bottom cover 2 at the bottom of a slurry barrel 1, installing ultrasonic detection assemblies on the side wall of the slurry barrel 1, wherein the ultrasonic detection assemblies are provided with a plurality of groups, and the plurality of groups of ultrasonic detection assemblies are arranged along the slurry barrel 1 at different heights and are used for detecting the ultrasonic propagation speed in cement slurry in different sections in the slurry barrel 1; connecting a plurality of groups of ultrasonic detection components with the ultrasonic detector 10; placing the pulp cylinder 1 provided with the bottom cover 2 and the ultrasonic detection assembly into a heating sleeve 5; connecting the heating jacket 5 with a temperature controller 9; the temperature controller 9, the ultrasonic detector 10 and the driving controller 11 are respectively connected with a main control computer 12;
preparing cement paste and thickening the cement paste, preparing the cement paste according to an experimental formula, wherein the formula of the cement paste is shown in table 1, and pouring the prepared cement paste into the scale lines of the cement paste in the mortar barrel 1; assembling the top cover 3 and the magnetic driving stirring assembly 4, and connecting the magnetic driving stirring assembly 4 with the driving controller 11; turning on the power supply of the driving controller 11, and setting the rotation speed of the magnetic driving stirring assembly 4 to be 150 rpm; turning on the power supply of the temperature controller 9, setting the target temperature at 50 deg.C, the initial pressure at 7.0Mpa, and the heating time at 30 min;
and (3) opening an operation switch of the driving controller 11 and a heating switch of the temperature controller 9 to start a thickening experiment, wherein the thickening time is 60min, after the thickening is finished, opening the ultrasonic detector 10, setting the ultrasonic detection frequency to be 10 min/time, operating an acquisition recording system of the main control computer 12, and detecting the sedimentation stability of the cement paste. The results of the tests are shown in FIGS. 3 and 4.
Table 1 above is a low density cement slurry experimental formulation.
Example 2
Detecting the sedimentation stability of the conventional density cement slurry:
the method comprises the following steps of assembling an ultrasonic detection device, namely installing a bottom cover 2 at the bottom of a slurry barrel 1, installing ultrasonic detection assemblies on the side wall of the slurry barrel 1, wherein the ultrasonic detection assemblies are provided with a plurality of groups, and the plurality of groups of ultrasonic detection assemblies are arranged along the slurry barrel 1 at different heights and are used for detecting the ultrasonic propagation speed in cement slurry in different sections in the slurry barrel 1; connecting a plurality of groups of ultrasonic detection components with the ultrasonic detector 10; placing the pulp cylinder 1 provided with the bottom cover 2 and the ultrasonic detection assembly into a heating sleeve 5; connecting the heating jacket 5 with a temperature controller 9; the temperature controller 9, the ultrasonic detector 10 and the driving controller 11 are respectively connected with a main control computer 12;
preparing cement paste and thickening the cement paste, preparing the cement paste according to an experimental formula, wherein the formula of the cement paste is shown in a table 2, and pouring the prepared cement paste into a slurry cylinder 1 at a slurry scale mark; assembling the top cover 3 and the magnetic driving stirring assembly 4, and connecting the magnetic driving stirring assembly 4 with the driving controller 11; turning on the power supply of the driving controller 11, and setting the rotation speed of the magnetic driving stirring assembly 4 to be 150 rpm; turning on the power supply of the temperature controller 9, setting the target temperature at 60 deg.C, the initial pressure at 7.0Mpa, and the heating time at 30 min;
and (3) opening an operation switch of the driving controller 11 and a heating switch of the temperature controller 9 to start a thickening experiment, wherein the thickening time is 60min, after the thickening is finished, opening the ultrasonic detector 10, setting the ultrasonic detection frequency to be 10 min/time, operating an acquisition recording system of the main control computer 12, and detecting the sedimentation stability of the cement paste. The results of the tests are shown in FIGS. 5 and 6.
Table 2 above is a conventional density cement slurry experimental formulation.
Example 3
Detecting the sedimentation stability of the high-density cement slurry:
the method comprises the following steps of assembling an ultrasonic detection device, namely installing a bottom cover 2 at the bottom of a slurry barrel 1, installing ultrasonic detection assemblies on the side wall of the slurry barrel 1, wherein the ultrasonic detection assemblies are provided with a plurality of groups, and the plurality of groups of ultrasonic detection assemblies are arranged along the slurry barrel 1 at different heights and are used for detecting the ultrasonic propagation speed in cement slurry in different sections in the slurry barrel 1; connecting a plurality of groups of ultrasonic detection components with the ultrasonic detector 10; placing the pulp cylinder 1 provided with the bottom cover 2 and the ultrasonic detection assembly into a heating sleeve 5; connecting the heating jacket 5 with a temperature controller 9; the temperature controller 9, the ultrasonic detector 10 and the driving controller 11 are respectively connected with a main control computer 12;
preparing cement paste and thickening the cement paste, preparing the cement paste according to an experimental formula, wherein the formula of the cement paste is shown in a table 3, and pouring the prepared cement paste into the scale lines of the cement paste in the mortar barrel 1; assembling the top cover 3 and the magnetic driving stirring assembly 4, and connecting the magnetic driving stirring assembly 4 with the driving controller 11; turning on the power supply of the driving controller 11, and setting the rotation speed of the magnetic driving stirring assembly 4 to be 150 rpm; turning on the power supply of the temperature controller 9, setting the target temperature at 80 deg.C, the initial pressure at 7.0Mpa, and the heating time at 60 min;
and (3) opening an operation switch of the driving controller 11 and a heating switch of the temperature controller 9 to start a thickening experiment, wherein the thickening time is 60min, after the thickening is finished, opening the ultrasonic detector 10, setting the ultrasonic detection frequency to be 10 min/time, operating an acquisition recording system of the main control computer 12, and detecting the sedimentation stability of the cement paste. The results of the detection are shown in FIGS. 7 and 8.
Table 3 above is the high density cement slurry experimental formulation.
And (3) analyzing an experimental result:
(1) comparing the three groups of experimental results, it can be known that the cement paste system with better sedimentation stability has smaller difference values among the sound velocity at the upper part, the sound velocity at the middle part and the sound velocity at the lower part of the paste along with the prolonging of the waiting setting time, and the cement paste system with poor sedimentation stability has larger difference values among the sound velocity at the upper part, the sound velocity at the middle part and the sound velocity at the lower part of the paste, which shows that the quality of the sedimentation stability of the cement paste can be judged through the difference values among the ultrasonic sound velocities.
(2) For a cement paste system with poor sedimentation stability, the later strength difference of cement stones in different intervals is large, a strength weak section may appear on the upper part of a cement sheath, and the integrity of the cement sheath may be damaged or even a casing may be damaged due to stress concentration in the interval.
Example 4
In the above-mentioned examples 1, 2 and 3, in the cement paste preparation and cement paste thickening steps, the thickening time is set according to the construction scheme of on-site cement injection, and the thickening time is the time required for the cement paste to start to set statically after the cement paste is injected from the wellhead to the bottom of the well and returns to the designed height.
The initial pressure set in the above-described examples 1, 2, and 3 is set by injecting gas into the gas injection joint 15 provided in the top cover 3; during the densification step, gas is injected at a set pressure from gas injection fitting 15 to simulate downhole formation pressure. And a pressure sensor is also arranged in the grout barrel 1 and used for feeding back the underground formation pressure simulated by gas injected into the grout barrel 1 through a gas injection joint 15 to a main control computer 12.
The ultrasonic detection assembly comprises an ultrasonic transmitter 6 and an ultrasonic receiver 7, the ultrasonic transmitter 6 and the ultrasonic receiver 7 are respectively arranged on two sides of the pulp barrel 1 along the radial direction of the pulp barrel 1, and the ultrasonic transmitter 6 and the ultrasonic receiver 7 are positioned in the diameter direction of the pulp barrel 1; the multiple groups of ultrasonic detection assemblies are arranged along the axial direction of the pulp barrel 1 and are positioned on the same axial plane. The working frequency of the ultrasonic detection assembly is 50 kHz. The ultrasonic detector 10 is a CTS-25 nonmetal ultrasonic detector 10.
As shown in fig. 1, a temperature thermocouple 8 is installed on the heating jacket 5, and the temperature thermocouple 8 is connected with a temperature controller 9 to feed back the heating temperature to the temperature controller 9. As shown in fig. 2, the magnetically-driven stirring assembly 4 includes a stirring blade 13 and a magnetically-driven head 14, the upper end of the stirring blade 13 is fixed by the top cover 3 and is connected to the magnetically-driven head 14, the lower end of the stirring blade 13 extends into the paddle barrel 1, and the magnetically-driven head 14 rotates under the control of the driving controller 11.
Claims (9)
1. A detection method for measuring the stability of oil well cement by ultrasonic waves is characterized in that: the method comprises the following steps:
the method comprises the following steps of assembling an ultrasonic detection device, namely installing a bottom cover (2) at the bottom of a slurry cylinder (1), installing ultrasonic detection assemblies on the side wall of the slurry cylinder (1), wherein the ultrasonic detection assemblies are arranged in a plurality of groups, and the plurality of groups of ultrasonic detection assemblies are arranged along the slurry cylinder (1) at different heights and are used for detecting the ultrasonic propagation speed in the cement slurry in different sections in the slurry cylinder (1); connecting a plurality of groups of ultrasonic detection components with an ultrasonic detector (10); placing the pulp cylinder (1) provided with the bottom cover (2) and the ultrasonic detection assembly into a heating sleeve (5); connecting the heating jacket (5) with a temperature controller (9); the temperature controller (9), the ultrasonic detector (10) and the driving controller (11) are respectively connected with a main control computer (12);
preparing cement paste and thickening the cement paste, preparing the cement paste according to an experimental formula, and pouring the cement paste into the scale lines of the cement paste in the mortar barrel (1); assembling a top cover (3) and a magnetic driving stirring component (4), and connecting the magnetic driving stirring component (4) with a driving controller (11); the power supply of the driving controller (11) is turned on, and the rotating speed of the magnetic driving stirring assembly (4) is set according to the actual cement slurry injection speed on site; a power supply of the temperature controller (9) is turned on, and a temperature rise program is set according to the temperature rise gradient of the cement slurry injected on site;
and (3) detecting the sedimentation stability of the cement paste, after thickening is finished, opening an ultrasonic detector (10), setting the ultrasonic detection frequency, operating a main control computer (12), controlling the ultrasonic detector (10) to collect ultrasonic propagation speed data in the cement paste of different sections in the pulp barrel (1) detected by a plurality of groups of ultrasonic detection assemblies in real time, and detecting the sedimentation stability of the cement paste.
2. The method of claim 1, wherein the method comprises the following steps: in the steps of cement paste preparation and cement paste thickening, thickening time is set according to a construction scheme of on-site cement paste injection, and the thickening time is the time required for the cement paste to start standing and waiting for setting after the cement paste is injected into a well bottom from a well head and returns to a designed height.
3. The method for testing the stability of oil well cement by ultrasonic wave according to claim 1 or 2, wherein: in the steps of cement paste preparation and cement paste thickening, when the top cover (3) is assembled, a gas injection joint (15) is arranged on the top cover (3); during the densification step, gas is injected at a set pressure from a gas injection fitting (15) to simulate downhole formation pressure.
4. The method of claim 3, wherein the method comprises the following steps: and a pressure sensor is also arranged in the grout barrel (1), and the pressure sensor is used for feeding back the underground formation pressure simulated by gas injected into the grout barrel (1) through a gas injection joint (15) to a main control computer (12).
5. The method of claim 1, wherein the method comprises the following steps: the ultrasonic detection assembly comprises an ultrasonic transmitter (6) and an ultrasonic receiver (7), the ultrasonic transmitter (6) and the ultrasonic receiver (7) are respectively arranged on two sides of the pulp barrel (1) along the radial direction of the pulp barrel (1), and the ultrasonic transmitter (6) and the ultrasonic receiver (7) are positioned in the diameter direction of the pulp barrel (1); the multiple groups of ultrasonic detection assemblies are axially arranged along the pulp barrel (1) and are positioned on the same axial plane.
6. The method for testing the stability of oil well cement according to claim 1 or 5, wherein: the working frequency of the ultrasonic detection assembly is 50 kHz.
7. The method for testing the stability of oil well cement according to claim 1 or 5, wherein: the ultrasonic detector (10) is a CTS-25 nonmetal ultrasonic detector (10).
8. The method of claim 1, wherein the method comprises the following steps: and a temperature thermocouple (8) is installed on the heating sleeve (5), the temperature thermocouple (8) is connected with a temperature controller (9), and the heating temperature is fed back to the temperature controller (9).
9. The method of claim 1, wherein the method comprises the following steps: magnetic drive stirring subassembly (4) are including stirring paddle (13) and magnetic drive head (14), and stirring paddle (13) upper end is fixed by top cap (3) and links to each other with magnetic drive head (14), and stirring paddle (13) lower extreme extends to thick liquid section of thick bamboo (1), and magnetic drive head (14) rotate under drive controller's (11) control.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011308529.1A CN112461721A (en) | 2020-11-20 | 2020-11-20 | Detection method for measuring stability of oil well cement by ultrasonic waves |
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| CN202011308529.1A CN112461721A (en) | 2020-11-20 | 2020-11-20 | Detection method for measuring stability of oil well cement by ultrasonic waves |
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| CN202011308529.1A Pending CN112461721A (en) | 2020-11-20 | 2020-11-20 | Detection method for measuring stability of oil well cement by ultrasonic waves |
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