Portable capillary viscosity measuring device

Abstract

The utility model discloses a portable capillary viscosity measuring device which comprises a head valve, a constant temperature box, a sample containing mechanism and a pressure detection mechanism, a double-end valve is arranged at the top of the constant temperature box, the sample containing mechanism is arranged in the constant temperature box, and the sample containing mechanism is used for containing a sample to be detected during detection; the pressure detection mechanism is arranged at the bottom of the constant-temperature box and is used for detecting the pressure of the sample in the sample containing mechanism. The double-end valve, the constant-temperature box, the sample containing mechanism and the pressure detection mechanism jointly form the detection equipment, the sample containing mechanism is arranged in the constant-temperature box, the sample containing mechanism is provided with a piston container, so that samples only flow in the container and a capillary tube and are not influenced by other environmental factors, and after measurement, the sample containing mechanism can be used for detecting the pressure of the sample containing mechanism. And under the structural arrangement, the sample cannot flow everywhere, so that the device is more convenient to clean.

Description

TECHNICAL FIELD

[0001] The utility model relates to viscosity measurement equipment field, especially in kind of portable capillary tube viscosity measuring device. BACKGROUND

[0002] Viscosity is one of the most important PVT characteristics of reservoir fluid, and obtaining early oil and gas viscosity information of reservoir fluid is crucial for calculating two-phase flow, natural gas pressure and oil recovery.

[0003] The existing capillary tube viscosity measurement method is to use a large viscosity measurement device, connect the capillary tube to be measured in the measurement device, and detect after conveying the sample into the device. In the existing detection method, the sample contacts the pressure sensor in the device during the flow process, which pollutes the sample and makes the sample unable to be recovered. Moreover, during the flow process of the sample, there are cleaning dead angles in the pipeline of the device. Since the device is not easy to disassemble, the device is complex to clean. In view of this, the present application provides a portable capillary tube viscosity measuring device to solve the above problems. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of portable capillary tube viscosity measuring device to solve the problems raised in the above background.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of portable capillary tube viscosity measuring device, including double-head valve and thermostat, the double-head valve is set up in the top of thermostat, still include:

[0006] Sample holding mechanism, the sample holding mechanism is set up in thermostat, and the sample holding mechanism is used for the holding of sample detection when detection;

[0007] Pressure detection mechanism, the pressure detection mechanism is set up in the bottom of thermostat, and the pressure detection mechanism is used for the detection of sample pressure in sample holding mechanism.

[0008] Preferably, the feeding end of the double-head valve is respectively provided with feeding a port and feeding b port, the feeding a port is used for connecting vacuum pump, the feeding b port is used for connecting sample pipeline, and the discharge port of the double-head valve is used for connecting sample holding mechanism.

[0009] Preferably, the sample holding mechanism includes:

[0010] First piston container, the feeding end of the first piston container is provided with first tee piece, and one end of the first tee piece away from the first piston container is connected with the discharge port of double-head valve in penetration;

[0011] The second piston container is provided with a double-way piece at the feeding end, and the pressure control ends of the first and second piston containers are used for connecting a pressure detection mechanism.

[0012] Preferably, a to-be-measured capillary is arranged between the other end of the first three-way piece away from the first piston container and the one end of the double-way piece away from the second piston container, and a temperature sensor is arranged at the tube wall of the to-be-measured capillary.

[0013] Preferably, the pressure detection mechanism comprises:

[0014] A second three-way piece, one end of the second three-way piece is connected with the pressure control end of the first piston container, and a first pressure sensor is arranged at one end of the second three-way piece away from the first piston container.

[0015] A third three-way piece, one end of the third three-way piece is connected with the pressure control end of the second piston container, and a second pressure sensor is arranged at one end of the third three-way piece away from the second piston container.

[0016] Preferably, the other end of the second three-way piece away from the first piston container is arranged as a driving c port, and the driving c port is used for connecting a driving pump.

[0017] Preferably, the other end of the third three-way piece away from the second piston container is arranged as a driving d port, and the driving d port is used for connecting a driving pump.

[0018] The technical effects and advantages of the utility model are as follows:

[0019] The utility model discloses a double-end valve, a thermostat, a sample containing mechanism and a pressure detection mechanism jointly constitute a detection equipment, wherein the sample containing mechanism is arranged in the thermostat, wherein the sample containing mechanism is arranged through the setting of the piston container, so that the sample only flows in the container and the capillary, is not influenced by other environmental factors, and can be recycled after measurement, and under the structure setting, the sample does not flow everywhere, so that the device can be cleaned more conveniently. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The utility model device connection principle block diagram.

[0021] In the drawing: 1, double-end valve;2, thermostat;3, first three-way piece;4, double-way piece;5, first piston container;6, second piston container;7, to-be-measured capillary;8, temperature sensor;9, second three-way piece;10, third three-way piece;11, first pressure sensor;12, second pressure sensor. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0023] The utility model provides a kind of portable capillary viscosity measuring device as shown in Figure 1 It includes double-head valve 1 and thermostat 2, double-head valve 1 is arranged at the top of thermostat 2, the feed end of double-head valve 1 is respectively provided with feed a mouth and feed b mouth, feed a mouth is used to connect vacuum pump, feed b mouth is used to connect sample pipeline.

[0024] It needs to be explained that double-head valve 1 has two groups of control valve ends, which are HV1 valve end and HV2 valve end respectively, the two groups of control valve ends correspond to the on-off control of feed a mouth and feed b mouth respectively, wherein HV1 valve end controls the on-off of feed b mouth, HV2 valve end controls the on-off of feed a mouth, in the actual detection operation process, first, feed a mouth is connected with vacuum pump, and feed b mouth is connected with sample pipeline.

[0025] It further includes:

[0026] Sample holding mechanism, sample holding mechanism is arranged in thermostat 2, and sample holding mechanism is used for holding when detecting sample, and the discharge port of double-head valve 1 is used to connect sample holding mechanism.

[0027] Specifically, sample holding mechanism includes:

[0028] First piston container 5, the feed end of first piston container 5 is provided with first tee piece 3, and one end of first tee piece 3 away from first piston container 5 is connected with the discharge port of double-head valve 1.

[0029] Second piston container 6, the feed end of second piston container 6 is provided with double-way piece 4.

[0030] Specifically, the other end of first tee piece 3 away from first piston container 5 and one end of double-way piece 4 away from second piston container 6 are provided with to-be-measured capillary 7, and temperature sensor 8 is arranged at the wall of to-be-measured capillary 7.

[0031] It needs to be explained that first piston container 5 and second piston container 6 need to select the equipment with stable and small piston resistance, so as to ensure to reduce the measurement error caused by uneven piston resistance.

[0032] The temperature sensor 8 is arranged at the to-be-tested capillary 7 to cooperate with the oven 2 to detect the heating of the detection area, so that the to-be-tested capillary 7 is in an environment with accurate temperature and uniform temperature field when the viscosity is detected, and the accuracy of the measurement data is further ensured.

[0033] The pressure detection mechanism is arranged at the bottom of the oven 2, and is used for detecting the pressure of the sample in the sample containing mechanism. The pressure control end of the first piston container 5 and the second piston container 6 is used for connecting the pressure detection mechanism.

[0034] Specifically, the pressure detection mechanism comprises:

[0035] The second three-way piece 9 is connected with the pressure control end of the first piston container 5 at one end, and the first pressure sensor 11 is arranged at the other end of the second three-way piece 9 away from the first piston container 5.

[0036] Further, the other end of the second three-way piece 9 away from the first piston container 5 is arranged as a drive c port, and the drive c port is used for connecting a drive pump.

[0037] The third three-way piece 10 is connected with the pressure control end of the second piston container 6 at one end, and the second pressure sensor 12 is arranged at the other end of the third three-way piece 10 away from the second piston container 6.

[0038] Further, the other end of the third three-way piece 10 away from the second piston container 6 is arranged as a drive d port, and the drive d port is used for connecting a drive pump.

[0039] It should be noted that the drive c port and the drive d port are connected with the drive pump, so as to control the pistons of the first piston container 5 and the second piston container 6 respectively, and control the flow rate and the pressure during detection.

[0040] In actual use, the following steps are performed when the device detects the viscosity of the to-be-tested capillary 7:

[0041] S1, first, connect the feeding a port with a vacuum pump, connect the feeding b port with a sample pipeline, and connect the drive c port and the drive d port with two drive pumps respectively;

[0042] S2, use the two drive pumps to push the first piston container 5 and the second piston container 6 to the top by the drive c port and the drive d port, provide 1000 psi pressure, and then stop the pump, close the HV1 valve end of the double-head valve 1, open the HV2 valve end, and start the vacuum pump; after vacuumizing for 30 min, close the HV2 valve end, and stop the vacuum pump;

[0043] S3, open HV1 valve end, start sample at feed a port, after the first pressure sensor 11 and second pressure sensor 12 show stable pressure (and consistent with the sample end pressure), connect drive pump constant flow back pump at drive c port, sample end keeps sample pressure pump, after sample complete, close HV1 valve end, stop connecting drive pump at drive c port;

[0044] S4, then drive pump constant flow at drive c port, drive pump constant pressure at drive d port, under test pressure, reciprocating motion, make sample gradually recover in reciprocating motion, after constant flow operation, the difference of first pressure sensor 11 and second pressure sensor 12 is stable, consider sample recovered well, then change flow rate according to recovered sample process, record the difference of first pressure sensor 11 and second pressure sensor 12 under different flow rate, calculate fluid viscosity.

[0045] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for those skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included in the scope of protection of the present application.

Claims

1. A portable capillary viscometer device comprising a double head valve (1) and a thermostat (2), said double head valve (1) is provided on the top of the thermostat (2), characterized in that, Also include: Sample holding mechanism, the sample holding mechanism is arranged in the thermostat (2), the sample holding mechanism is used for holding when detecting the sample to be detected; Pressure detection mechanism, the pressure detection mechanism is arranged at the bottom of the thermostat (2), and the pressure detection mechanism is used for detecting the pressure of the sample in the sample holding mechanism.

2. A portable capillary viscometer according to claim 1, wherein The feeding end of the double head valve (1) is respectively provided with a feeding a port and a feeding b port, the feeding a port is used for connecting a vacuum pump, the feeding b port is used for connecting a sample pipeline, and the discharge port of the double head valve (1) is used for connecting the sample holding mechanism.

3. A portable capillary tube viscometer as defined in claim 2, wherein The sample holding mechanism comprises: A first piston container (5), the feeding end of the first piston container (5) is provided with a first three-way piece (3), one end of the first three-way piece (3) away from the first piston container (5) is connected with the discharge port of the double head valve (1) in a penetrating mode; A second piston container (6), the feeding end of the second piston container (6) is provided with a double-way piece (4), and the pressure control ends of the first piston container (5) and the second piston container (6) are used for connecting the pressure detection mechanism.

4. A portable capillary tube viscometer as defined in claim 3, wherein The other end of the first three-way piece (3) away from the first piston container (5) is connected with one end of the double-way piece (4) away from the second piston container (6) in a penetrating mode, and a to-be-measured capillary tube (7) is arranged between the other end of the first three-way piece (3) away from the first piston container (5) and one end of the double-way piece (4) away from the second piston container (6), and a temperature sensor (8) is arranged at the wall of the to-be-measured capillary tube (7).

5. A portable capillary tube viscometer as defined in claim 3, wherein The pressure detection mechanism comprises: A second three-way piece (9), one end of the second three-way piece (9) is connected with the pressure control end of the first piston container (5) in a penetrating mode, and a first pressure sensor (11) is arranged at one end of the second three-way piece (9) away from the first piston container (5); A third three-way piece (10), one end of the third three-way piece (10) is connected with the pressure control end of the second piston container (6) in a penetrating mode, and a second pressure sensor (12) is arranged at one end of the third three-way piece (10) away from the second piston container (6).

6. A portable capillary tube viscometer as defined in claim 5, wherein The other end of the second three-way piece (9) away from the first piston container (5) is provided as a drive c port, and the drive c port is used for connecting a drive pump.

7. A portable capillary tube viscometer as defined in claim 5, wherein The other end of the third three-way piece (10) away from the second piston container (6) is provided as a drive d port, and the drive d port is used for connecting a drive pump.

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