CN114441383A - Low-temperature high-pressure rotary viscometer for well cementation cement slurry - Google Patents
Low-temperature high-pressure rotary viscometer for well cementation cement slurry Download PDFInfo
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- CN114441383A CN114441383A CN202011115159.XA CN202011115159A CN114441383A CN 114441383 A CN114441383 A CN 114441383A CN 202011115159 A CN202011115159 A CN 202011115159A CN 114441383 A CN114441383 A CN 114441383A
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- 239000004568 cement Substances 0.000 title claims abstract description 49
- 239000002002 slurry Substances 0.000 title claims abstract description 42
- 238000007710 freezing Methods 0.000 claims description 39
- 230000008014 freezing Effects 0.000 claims description 39
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 20
- 230000007246 mechanism Effects 0.000 claims description 20
- 238000007789 sealing Methods 0.000 claims description 14
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 8
- 238000005057 refrigeration Methods 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 5
- 238000010008 shearing Methods 0.000 claims description 2
- 239000011440 grout Substances 0.000 claims 1
- 239000007789 gas Substances 0.000 description 14
- 239000007788 liquid Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 7
- 239000003507 refrigerant Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 238000011161 development Methods 0.000 description 5
- 238000011056 performance test Methods 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 230000006872 improvement Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000011268 mixed slurry Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
- G01N11/10—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by moving a body within the material
- G01N11/14—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by moving a body within the material by using rotary bodies, e.g. vane
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- General Health & Medical Sciences (AREA)
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- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
The invention provides a low-temperature high-pressure rotary viscometer for well cementation cement slurry, which comprises a viscometer host, wherein the viscometer host is arranged on a base and has a certain distance with the base; the measuring cup is arranged below the viscometer main unit, and cement slurry is contained in the measuring cup and the stratum environment is simulated; the temperature adjusting device is connected with the measuring cup and controls the temperature in the measuring cup under a low-temperature environment; the pressure device is connected with the measuring cup, the pressure device controls the pressure in the measuring cup and measures the viscosity of cement slurry in the measuring cup.
Description
Technical Field
The invention relates to a low-temperature high-pressure rotary viscometer for well cementation cement slurry, in particular to a low-temperature oil well cement slurry viscometer used for laboratory research.
Background
Cementing projects in oil and gas development require squeeze cement slurry. The viscosity characteristic of the cement slurry is related to the injection flow resistance of the cement slurry during well cementation, influences the displacement efficiency of the cement slurry on the cement slurry and the well cementation quality, and is an important parameter for determining well cementation. The temperature is used as a main thermodynamic parameter of cement hydration, directly determines the evolution of the microstructure of cement paste and the development of performance, and is very important to the influence of viscosity change.
Along with the continuous expansion of the exploration and development field, the construction environment of the well cementation engineering is also continuously changed, a plurality of low-temperature environments appear, for example, important oil and gas reservoirs in polar cold sea areas are mostly distributed in perennial frozen soil areas, and the well cementation construction is carried out in a stratum with the temperature of-5 to-8 ℃; the temperature of a muddy water boundary in deep sea cementing construction is usually only a few degrees centigrade. However, most of conventional instruments used for indoor research of oil well cement in indoor research are designed under the conditions of room temperature or high temperature, the low-temperature environment is not considered, the environmental temperature has great influence on the performance of a viscosimeter of the cement, and experiments prove that: for general liquid, when the temperature deviation is 0.5 ℃, the viscosity value of some liquid deviates by more than 5 percent, the temperature deviation has great influence on the viscosity, the temperature is increased, and the viscosity is reduced. For cement paste, the temperature not only affects the viscosity, but also affects the hydration process, and the cement paste system suitable for the low-temperature environment can be hydrated too fast under the normal-temperature condition, and the viscosity performance changes rapidly, so that the real low-temperature viscometer parameters of the cement paste can not be accurately obtained by adopting the conventional viscometer test in a laboratory.
As can be seen, the existing instruments can not meet the performance test requirements of the viscometer in the environment that the cement paste is lower than room temperature. At present, equipment and methods in the related field of low-temperature cement testing in China are blank, and research and development of a low-temperature cement system are severely restricted, so that the research and development of the low-temperature well cementation cement slurry viscometer is of great significance.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a low-temperature high-pressure rotary viscometer for well cementation cement slurry, which can simulate a low-temperature high-pressure environment to perform cement slurry viscometer performance test and avoid adverse effects of an indoor high-temperature environment on the low-temperature cement viscometer performance test.
The invention provides a low-temperature high-pressure rotary viscometer for well cementation cement slurry, which comprises:
the viscometer main machine is arranged on the base and has a certain distance with the base;
the measuring cup is arranged below the viscometer main unit, and cement slurry is contained in the measuring cup and the stratum environment is simulated;
the temperature adjusting device is connected with the measuring cup and controls the temperature in the measuring cup under a low-temperature environment; and
and the pressurizing device is connected with the measuring cup, controls the pressure in the measuring cup and measures the viscosity of the cement slurry in the measuring cup.
The invention further improves that the pressurizing device comprises a rotating mechanism and a pressure control mechanism, wherein the rotating mechanism is used for stirring and detecting the torque in the measuring cup at a certain shearing rate so as to calculate the viscosity of the cement paste; the pressurization control mechanism provides pressure to the measuring cup to keep the measuring cup within a certain pressure range.
The invention has the further improvement that the rotating mechanism comprises a motor arranged on the host machine of the viscometer, and a rotor extending into the measuring cup is arranged on a rotating shaft of the motor; and a torque measuring and sensing device is arranged in the motor.
The invention has the further improvement that the upper end of the measuring cup is provided with a measuring cup cover, and the measuring cup cover is provided with a sealing ring; the rotating shaft is arranged in the sealing ring through a sealing bearing, so that the rotating shaft is connected with the measuring cup cover in a rotating and sealing mode.
The invention has the further improvement that the pressure control mechanism comprises a nitrogen bottle which is connected with the measuring cup cover through a pressurizing air duct; the nitrogen bottle provides nitrogen into the measuring cup through the pressurizing air duct so as to keep the measuring cup at a certain pressure.
The invention further improves the structure that a pressure detection device is arranged on the air duct.
The invention is further improved in that the temperature adjusting device comprises a freezing cylinder, and the measuring cup is placed inside the freezing cylinder; the freezing cylinder is connected with a refrigerating device, and the refrigerating device can cool the freezing cylinder so as to control the temperature of the measuring cup.
The invention has the further improvement that a temperature measuring device for measuring the temperature of the measuring cup is arranged in the freezing cylinder;
and a temperature control device is also arranged in the viscometer host, receives the signal of the temperature measuring device and controls the refrigerating device to start or stop.
The invention is further improved in that the refrigerating device comprises an evaporator arranged in the freezing cylinder and a condenser arranged in the main case; the outlet end of the condenser is connected with the inlet end of the evaporator through a first conduit, and the inlet end of the condenser is connected with the outlet end of the evaporator through a second conduit;
wherein a refrigeration compressor is arranged on the second conduit.
A further development of the invention consists in that a throttle valve is arranged on the first conduit.
A further development of the invention is that the evaporator comprises an evaporator line arranged in a spiral in the freezing cylinder.
The invention is further improved in that the temperature measuring device is a temperature couple which is fixed on the side wall of the freezing cylinder and is connected with the temperature control equipment through a cable.
The invention is further improved in that the viscometer host is provided with a control and display device.
Compared with the prior art, the invention has the advantages that:
the low-temperature high-pressure rotary viscometer for well cementation cement paste can simulate a low-temperature high-pressure environment to perform cement paste viscometer performance test, and avoids adverse effects of an indoor high-temperature environment on the low-temperature cement viscometer performance test. The viscosity of the cement slurry at different temperatures and pressures and at various shear rates is measured by adopting a rotary viscometer with an automatic refrigeration function. And pouring the mixed slurry into a measuring cup to enable the slurry to just reach the scale mark, placing the measuring cup into a cooling cylinder of a rotary viscometer with the temperature reduced to a preset interval to carry out viscosity test and record data.
According to the invention, the measuring cup can be rapidly cooled, the low-pressure liquid enters the evaporator pipeline in the cooling cylinder for gasification, the heat is absorbed, the temperature in the cooling cylinder is rapidly reduced, the test temperature can be as low as-18 ℃ according to the power of the compressor, and the simulation of the real environment temperature on site is realized. The temperature of the liquid in the measuring cup is controllable. The temperature in the freezing cylinder is controlled and adjusted through the temperature control equipment and the refrigerating system. The pressure in the measuring cup is controllable. The pressure in the measuring cup is adjusted through the gas cylinder.
Drawings
Preferred embodiments of the present invention will be described in detail below with reference to the attached drawing figures, wherein:
FIG. 1 is a schematic structural diagram of a low-temperature high-pressure rotational viscometer for cementing slurry according to one embodiment of the invention;
FIG. 2 is a schematic structural view of a pressurizing device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a thermostat according to an embodiment of the present invention.
In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.
The meaning of the reference symbols in the drawings is as follows: 1. the viscometer comprises a viscometer host, a measuring cup, a pressure device, a temperature adjusting device, a base, a control and display device, a measuring cup, a measuring groove, a measuring rod, a measuring cup cover, a sealing ring, a gas inlet, a motor, a rotor, a torque measuring and sensing device, a nitrogen gas bottle, a pressure gas guide pipe, a pressure detecting device, a measuring tank, a freezing cylinder, a host box, a 42, an evaporator, a 43, a condensing pipe, a compressor, a 45, a throttle valve, a 46, a temperature measuring device, a 47, a temperature control device, a 48, a first conduit, a 49 and a second conduit.
Detailed Description
In order to make the technical solutions and advantages of the present invention more apparent, exemplary embodiments of the present invention are described in further detail below with reference to the accompanying drawings. It is clear that the described embodiments are only a part of the embodiments of the invention, and not an exhaustive list of all embodiments. And the embodiments and features of the embodiments may be combined with each other without conflict.
Fig. 1 schematically shows a cementing slurry low-temperature high-pressure rotary viscometer according to one embodiment of the invention, which comprises a viscometer main body 1, wherein the viscometer main body 1 is arranged on a base 11 and has a certain distance with the base 11. The edge of the viscometer main unit 1 is connected to the base 11 through a bracket. A measuring cup 2 is arranged below the viscometer host 1, and the measuring cup 2 is arranged on a base 11. The measuring cup 2 is filled with cement paste and simulates the formation environment.
The rotary viscosimeter of well cementation cement paste low temperature high pressure is still including connecting temperature regulation apparatus 4 and pressure device 3 of graduated flask 2, temperature regulation apparatus 4 will temperature control in the graduated flask 2 is under the low temperature environment, pressure device 3 control 2 internal pressure of graduated flask, and measure the viscosity of cement paste in the graduated flask 2. In this embodiment, the low temperature is in a temperature environment of 10 to-18 ℃ and the high pressure is 0 to 15 MPa.
In the use process, the temperature adjusting device 4 and the pressurizing device 3 enable the measuring cup 2 to be in a low-temperature high-pressure state, and the pressurizing device 3 rotates the detection torque in the cement paste in the measuring cup 2 so as to calculate the viscosity of the cement paste.
In one embodiment, the pressurizing device 3 comprises a rotating mechanism and a pressure control mechanism, the rotating mechanism is used for stirring in the measuring cup 2 at a certain shear rate, torque can be detected during the rotating stirring process, and the viscosity of cement paste can be calculated through the torque. The pressurization control mechanism provides pressure for the measuring cup 2, so that the measuring cup 2 is kept in a certain pressure range, and the measuring cup 2 is kept in a high-pressure environment to simulate a real formation environment.
In one embodiment, the rotating mechanism comprises a motor 31 arranged on the viscometer main unit 1, and a rotor 32 extending into the measuring cup 2 is arranged on a rotating shaft of the motor 31; a torque measuring and sensing device 33 is provided in the motor 31.
In the viscometer according to the present embodiment, the motor 31 is vertically provided on the viscometer main unit 1, and the rotor shaft extends downward into the measuring cup 2. During the rotation of the motor 31, the rotor 32 rotates along with the motor, and stirs the cement slurry according to a certain shear rate, and during the stirring, the torque measuring and sensing device 33 measures the rotating torque, so as to determine the viscosity of the cement slurry.
In one embodiment, the upper end of the measuring cup 2 is provided with a measuring cup cover 21, and the measuring cup cover 21 is detachably connected to the measuring cup 2 in a sealing manner. A through hole is formed in the middle of the measuring cup cover 21, and a sealing ring 22 is arranged in the through hole; the measuring cup cover 21 is also provided with an air inlet 23 which is used for connecting a pressure control mechanism. The rotating shaft is arranged in the sealing ring 22 through a sealing bearing, so that the rotating shaft is connected with the measuring cup cover 21 in a rotating and sealing mode.
In one embodiment, the pressure control mechanism comprises a nitrogen gas bottle 34, and the nitrogen gas bottle 34 is connected with the measuring cup cover 21 through a pressurizing air duct 35; the nitrogen gas bottle 34 provides nitrogen gas into the measuring cup 2 through the pressurized air duct 35 to keep the measuring cup 2 at a certain pressure.
Preferably, a pressure detection device 36 is arranged on the air duct.
The nitrogen is protective gas, and cannot influence the experimental process. The pressure detection device 36 can detect the gas conditions in the gas guide tube and the measuring cup 2, increase the pressure input by the pressurization gas guide tube 35 when the pressure is lower, and maintain the pressure; when the pressure is higher, the pressure input to the pressurized gas conduit 35 is reduced.
In one embodiment, the temperature adjusting device 4 comprises a freezing cylinder 40, and a measuring cup 2 slot is arranged on the freezing cylinder 40 and used for installing the measuring cup 2. The freezing cylinder 40 is connected with a refrigerating device, and the refrigerating device can cool the freezing cylinder 40, so that the measuring cup 2 is cooled, and the temperature in the measuring cup 2 is controlled.
In one embodiment, as shown in fig. 2, a temperature measuring device 46 is arranged in the freezing cylinder 40 for measuring the temperature of the measuring cup 2; the viscometer host 1 is also internally provided with a temperature control device 47, and the temperature control device 47 receives the signal of the temperature measuring device 46 and controls the refrigeration device to start or stop.
In the working process of the cementing slurry low-temperature high-pressure rotation viscometer according to the embodiment, the temperature measuring device 46 monitors the temperature in the measuring cup 2 and transmits the temperature information to the temperature control device 47. When the temperature is higher than a certain value, the temperature control device 47 starts a refrigerating device to refrigerate the freezing cylinder 40 and the measuring cup 2; when the temperature drops to a certain value, the temperature control device 47 turns off the cooling device. In this way, the temperature in the freezing cylinder 40 is maintained within a certain range.
The temperature control device 47 not only has the functions of displaying the real-time temperature in the measuring cup 2 and the work of the compressor 44, but also can control the freezing speed of the freezing chamber and set a temperature reduction program. When the device is used, the temperature of the freezing cylinder 40 is cooled to the target temperature, then the negative temperature cement slurry is poured into the measuring cup 2, and the test is started, so that the low-temperature field environment can be simulated to the maximum extent.
In one embodiment, the refrigerating apparatus includes an evaporator 42 disposed inside the freezing cylinder 40, and a condenser disposed inside the main cabinet 41 outside the freezing cylinder 40. Wherein the evaporator 42 is a spiral type pipe wound in the groove of the measuring cup 2 of the freezing cylinder 40. The outlet end of the condenser is connected to the inlet end of the evaporator 42 by a first conduit 48 and the inlet end of the condenser is connected to the outlet end of the evaporator 42 by a second conduit 49. Wherein the second conduit 49 is provided with a refrigerant compressor 44. The refrigerant in the refrigeration unit circulates between the condenser and the evaporator 42 to transfer heat from the evaporator 42 to the condenser for release.
In a preferred embodiment, a throttle valve 45 is provided on the first conduit 48. The inflow end of the throttle valve 45 is connected to the condenser tube 43, and the refrigerant in the condenser tube 43 maintains a high-pressure environment, and the high-pressure refrigerant liquid passes through the throttle valve 45 and enters a low-pressure environment in the evaporator 42 to evaporate and absorb heat.
When the cementing slurry low-temperature high-pressure rotational viscosity meter according to the embodiment is used, the refrigerant gas is pressurized by the refrigeration compressor 44 and then sent into the condensation pipe 43, and the high-pressure refrigerant gas releases heat in the condensation pipe 43 to form the high-pressure liquid inflow throttle valve 45. The high pressure refrigerant liquid becomes larger in volume in the throttle valve 45 and enters the evaporator 42 line as a low pressure liquid. The liquid in the pipeline of the evaporator 42 absorbs heat and is gasified to form low-pressure gas, and the temperature of the freezing cylinder 40 is rapidly reduced; the low pressure gas then re-enters the compressor 44 to complete the refrigeration cycle.
In a preferred embodiment, the temperature measuring device 46 is a temperature couple fixed on the side wall of the freezing cylinder 40 and connected to the temperature control device 47 through a cable. The thermocouple detects the temperature in the freezing cylinder 40 in real time, and transmits the measured temperature signal to the temperature control device 47 through a cable.
In one embodiment, the viscometer host 1 is provided with a control and display device 12. The control and display device 12 comprises a temperature control device 47 capable of controlling said temperature regulating means 4. The control and display device 12 also comprises a motor 31 for controlling the rotation of the pressurizing device 3 and is capable of controlling the pressure in the pressurizing air duct 35 in the pressure control mechanism.
In a preferred embodiment, a moving groove 13 is formed on a support between the base 11 and the viscometer main unit 1, a moving rod 14 is connected to the freezing cylinder 40, and one end of the moving rod 14 is connected to the moving groove 13 and can move up and down along the moving groove 13. The cables and lines connecting the freezing cylinder 40 are disposed in the moving rod 14.
All the lines and circuits of the device in the freezing cylinder 40 are connected to the viscometer main unit 1 by being built in the movable rod 14. The moving rod 14 can move up and down along the moving groove 13 and is fixed at a specific position to facilitate measurement and disassembly of the measuring cup 2.
In the working process of the cementing slurry low-temperature high-pressure rotary viscometer according to the embodiment, the temperature of the cooling medium in the freezing cylinder 40 can be rapidly adjusted to negative temperature so as to ensure that the liquid in the measuring cup 2 is in a low-temperature environment; the temperature adjusting device 4 can display and adjust the temperature in the cooling cylinder; the temperature adjusting device 4 can control the power supply of the viscometer to be connected and control the built-in refrigerating device to operate; the nitrogen gas cylinder 34 can be pressurized by the pressurizing air duct 35 to the air inlet 23 of the vector cup cover 21, so that the environment in the measuring cup 2 simulates the low-temperature and high-pressure stratum environment.
The motor 31 is started to rotate the rotor 32 in the measuring cup 2 at a certain speed, and the torque measuring and sensing device 33 measures the rotating torque and judges the viscosity of the slurry according to the measured torque value.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, the appended claims are intended to be construed to include preferred embodiments and all such changes and/or modifications as fall within the scope of the invention, and all such changes and/or modifications as are made to the embodiments of the present invention are intended to be covered by the scope of the invention.
Claims (14)
1. The utility model provides a rotatory viscosimeter of well cementation grout low temperature high pressure which characterized in that includes:
the viscometer main unit (1), the viscometer main unit (1) is arranged on the base (11) and has a certain distance with the base (11);
the measuring cup (2) is arranged below the viscometer host (1), cement paste is contained in the measuring cup (2) and a stratum environment is simulated;
the temperature adjusting device (4) is connected with the measuring cup (2), and the temperature adjusting device (4) controls the temperature in the measuring cup (2) to be in a low-temperature environment; and
the pressurizing device (3) is connected with the measuring cup (2), the pressurizing device (3) controls the pressure in the measuring cup (2), and the viscosity of cement slurry in the measuring cup (2) is measured.
2. The low-temperature high-pressure rotational viscometer of cementing cement slurry according to claim 1, characterized in that the pressurizing device (3) comprises a rotating mechanism and a pressure control mechanism, the rotating mechanism is stirred in the measuring cup (2) at a certain shearing rate and detects torque, thereby calculating the viscosity of the cement slurry; the pressurization control mechanism provides pressure to the measuring cup (2) to keep the measuring cup (2) within a certain pressure range.
3. The cementing slurry low-temperature high-pressure rotary viscometer according to claim 2, wherein the rotating mechanism comprises a motor (31) arranged on the viscometer main body (1), and a rotor (32) extending into the measuring cup (2) is arranged on a rotating shaft of the motor (31); and a torque measuring and sensing device (33) is arranged in the motor (31).
4. The low-temperature high-pressure rotational viscometer of well cementation cement paste as claimed in claim 3, wherein the upper end of the measuring cup (2) is provided with a measuring cup cover (21), and the measuring cup cover (21) is provided with a sealing ring (22); the rotating shaft is arranged in the sealing ring (22) through a sealing bearing, so that the rotating shaft is connected with the measuring cup cover (21) in a rotating and sealing mode.
5. The cementing slurry low-temperature high-pressure rotary viscometer of claim 4, wherein the pressure control mechanism comprises a nitrogen gas cylinder (34), and the nitrogen gas cylinder (34) is connected with the measuring cup cover (21) through a pressurized air duct (35); the nitrogen bottle (34) supplies nitrogen into the measuring cup (2) through the pressurizing air duct (35) to keep the measuring cup (2) at a certain pressure.
6. The cementing slurry low-temperature high-pressure rotary viscometer of claim 5, wherein the air duct is provided with a pressure detection device (36).
7. The cementing slurry low-temperature high-pressure rotary viscometer according to any one of claims 1 to 6, characterized in that the temperature regulation device (4) comprises a freezing cylinder (40), the measuring cup (2) being placed inside the freezing cylinder (40); the freezing cylinder (40) is connected with a refrigerating device, and the refrigerating device can cool the freezing cylinder (40) so as to control the temperature of the measuring cup (2).
8. The cementing slurry low-temperature high-pressure rotary viscometer according to claim 7, wherein a temperature measuring device (46) for measuring the temperature of the measuring cup (2) is arranged in the freezing cylinder (40);
still be provided with temperature control equipment (47) in the viscosimeter host computer (1), temperature control equipment (47) receive the signal of temperature measuring device (46), and control refrigerating plant starts or stops.
9. The cementing slurry low-temperature high-pressure rotary viscometer of claim 8, wherein the refrigeration device comprises an evaporator (42) disposed within the freezing cylinder (40), and a condenser disposed within a main housing (41); the outlet end of the condenser is connected with the inlet end of the evaporator (42) through a first conduit (48), and the inlet end of the condenser is connected with the outlet end of the evaporator (42) through a second conduit (49);
wherein a refrigeration compressor (44) is arranged on the second conduit (49).
10. The cementing slurry low-temperature high-pressure rotational viscometer of claim 9, wherein the first conduit (48) is provided with a choke (45).
11. The cementing slurry low-temperature high-pressure rotary viscometer of claim 10, wherein the evaporator (42) comprises an evaporator (42) line helically arranged within the freezing cylinder (40).
12. The cementing slurry low-temperature high-pressure rotational viscometer according to any one of claims 7 to 11, characterized in that the temperature measuring device (46) is a temperature couple fixed on the sidewall of the freezing cylinder (40) and connected to the temperature control device (47) by a cable.
13. The low-temperature high-pressure rotational viscometer of cementing slurry according to claim 12, wherein the viscometer main body (1) is provided with a control and display device (12).
14. The low-temperature high-pressure rotary viscometer of well cementation cement paste according to claim 13, wherein a moving groove (13) is arranged between the base (11) and the viscometer main body (1), a moving rod (14) capable of moving up and down is arranged in the moving groove (13), and cables and pipelines connected with the freezing cylinder (40) are arranged in the moving rod (14).
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| CN211374419U (en) * | 2019-12-24 | 2020-08-28 | 东营钧辰石油设备有限责任公司 | Low-temperature testing device of rotational viscometer |
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