A compact oil viscosity detection device

Abstract

The utility model relates to the technical field of tight oil viscosity detection, and disclose a kind of tight oil viscosity detection device, including detector, and the lower end of detector is provided with detection tube, and the lower of detector is provided with detection pool, and the upper end of detection pool is provided with moving mechanism, and detector is detachably connected with the upper end of moving mechanism, and heating structure is arranged in detection pool, and cross-shaped flow divider is cross-arm structure, and the outlet end of breather pipe is fixedly connected by thread, and it is hollow structure inside, the hot air that can be guided out of breather pipe is further shunted diffusion, cross-shaped flow divider four sides are all set with different orientation air outlet, and air outlet is rectangular opening, and four groups of air outlet are respectively oriented the front and rear and left and right four directions of detection pool, realize the multidimensional injection of hot air, break the limitation of single direction air supply, and the cross-arm end of cross-shaped flow divider is fixedly connected with arc air deflector, and arc air deflector is arc piece structure.

Description

Technical Field

[0001] This utility model relates to the field of tight oil viscosity detection technology, specifically a tight oil viscosity detection device. Background Technology

[0002] Tight oil refers to oil accumulations formed in tight reservoirs sandwiched or adjacent to high-quality source rock formations without undergoing large-scale, long-distance migration. It is a large-area, continuously distributed oil resource that coexists with or is adjacent to source rock formations. In actual extraction, the viscosity of tight oil needs to be tested, and appropriate testing devices are usually required when testing the viscosity of tight oil.

[0003] For example, the tight oil viscosity testing device disclosed in CN219655782U uses a fixed platform and a fixed column to slide, which facilitates the movement of the detector left and right at the top of the testing pool. This allows the detector to insert the detection head into different positions of the tight oil inside the testing pool, making it convenient to test the viscosity of the tight oil at different positions.

[0004] However, when using this device, the viscosity of tight oil is extremely sensitive to temperature, and its viscosity value will fluctuate significantly under different temperature environments. In actual testing, it is necessary to maintain the tight oil within a specific temperature range, such as the formation simulation temperature or the standard testing temperature, to ensure the accuracy and reference value of the test results. This device lacks a heating and temperature control mechanism and cannot regulate the temperature of the tight oil in the test pool. In view of this, we propose a tight oil viscosity testing device. Utility Model Content

[0005] The purpose of this invention is to provide a dense oil viscosity testing device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a tight oil viscosity testing device, comprising a testing instrument, a testing tube provided at the lower end of the testing instrument, a testing pool provided below the testing instrument, a moving mechanism provided at the upper end of the testing pool, the testing instrument being detachably connected to the upper end of the moving mechanism, and a heating structure provided inside the testing pool;

[0007] The heating structure includes a hollow shaft penetrating the inner wall of the detection pool. An annular sleeve is fixedly installed on the side wall of the detection pool. A cavity is opened inside the annular sleeve. One end of the hollow shaft located outside the detection pool is located inside the annular sleeve and has a vent on its surface. A motor is fixedly installed on the side wall of the detection pool via a mounting base. The output shaft of the motor is fixedly connected to the end of the hollow shaft. Multiple sets of vent holes are opened on the surface of the hollow shaft. A vent pipe is fixedly installed on the side wall of the vent hole.

[0008] Preferably, the heating structure further includes a conical groove formed inside the vent pipe, the inner wall of the conical groove having an annular groove, multiple sets of spiral guide ribs fixedly installed on the inner wall of the vent pipe, and protrusions fixedly installed on the inner wall of the vent pipe.

[0009] Preferably, the protrusions are provided in multiple sets, and the multiple sets of protrusions are fixedly installed on the inner wall of the vent pipe and do not contact the spiral guide ribs, so as to ensure that the airflow passes smoothly while fully disturbing and rotating the airflow.

[0010] Preferably, the annular groove is provided in three sets, and the three sets of annular grooves are arranged in an array on the inner wall of the conical groove, which can evenly divide the hot air into multiple annular airflows and improve the initial homogenization effect.

[0011] Preferably, the diameter of the air outlet increases sequentially from the side closest to the motor to the other side, and the position of the air outlet is adapted to the vent pipe to ensure that hot air is completely introduced into the vent pipe.

[0012] Preferably, a hot air blower is fixedly installed on the side wall of the detection pool, and the hot air blower and the cavity are connected through an air inlet pipe.

[0013] Preferably, a cross-shaped diverter is fixedly installed on the side of the vent pipe away from the conical groove. The cross-shaped diverter has air outlets facing different directions on all four sides. Arc-shaped air guides are fixedly connected to the ends of the cross arms of the cross-shaped diverter. The four sets of arc-shaped air guides are bent in different directions along the circumference of the cross arms.

[0014] Compared with the prior art, this utility model provides a dense oil viscosity detection device, which has the following beneficial effects:

[0015] 1. This tight oil viscosity testing device effectively solves the problem of existing devices lacking heating and temperature control mechanisms by setting a heating structure. The hot air blower can generate hot air at a set temperature. The hot air enters the cavity of the annular sleeve through the air inlet pipe, and then enters the interior of the hollow shaft through the air vent. Subsequently, it is led out to the test cell through the air outlet and air vent pipe to heat the tight oil sample. At the same time, the motor drives the hollow shaft to rotate, so that multiple sets of air vent pipes make circular motion in the test cell. With the multi-directional air outlet of the cross-shaped diverter and the arc-shaped air guide, the hot air can evenly cover the entire internal space of the test cell, and stably maintain the tight oil sample within the set test temperature range, avoiding the distortion of test data due to temperature fluctuations or uneven temperature distribution.

[0016] 2. This dense oil viscosity testing device achieves precise hot air guidance by setting up a cross-shaped flow divider. The multi-directional air outlets are distributed in different directions along the cross arm, breaking the limitation of single-direction air supply. This allows the homogenized hot air to be sprayed into the front, back, left, and right dimensions inside the testing tank. The four sets of arc-shaped air guide vanes that are bent in different directions can guide the hot air sprayed from the air outlets in a secondary manner. This not only further disperses the airflow and avoids local wind speed concentration, but also guides the hot air to the corner areas of the testing tank. Combined with the rotational motion of the hollow shaft, the hot air covers the entire interior of the testing tank in multiple directions. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal cross-sectional structure of the detection pool of this utility model;

[0019] Figure 3 This is a partial exploded cross-sectional view of the sleeve section of this utility model;

[0020] Figure 4 This is a schematic diagram of the hollow shaft structure of this utility model;

[0021] Figure 5 This is a cross-sectional view of the vent pipe of this utility model;

[0022] Figure 6 This is a schematic diagram of the cross-shaped flow divider of this utility model.

[0023] In the diagram: 1. Detector; 2. Detection tube; 3. Heating structure; 31. Hollow shaft; 32. Annular sleeve; 33. Vent; 34. Motor; 35. Air outlet; 36. Vent pipe; 37. Conical groove; 38. Annular groove; 39. Spiral guide rib; 310. Protrusion; 5. Detection pool; 6. Moving mechanism; 7. Hot air blower; 8. Air inlet pipe; 9. Cross-shaped diverter; 10. Air outlet; 11. Arc-shaped air guide vane. Detailed Implementation

[0024] like Figures 1-6 As shown, this utility model provides a technical solution: a dense oil viscosity testing device, including a tester 1, a test tube 2 at the lower end of the tester 1, a test pool 5 below the tester 1, a moving mechanism 6 at the upper end of the test pool 5, the tester 1 and the upper end of the moving mechanism 6 being detachably connected, and a heating structure 3 being provided inside the test pool 5.

[0025] The heating structure 3 includes a hollow shaft 31 penetrating the inner wall of the detection pool 5. An annular sleeve 32 is fixedly installed on the side wall of the detection pool 5, and a cavity is formed inside the annular sleeve 32. One end of the hollow shaft 31 located outside the detection pool 5 is inside the annular sleeve 32 and has a vent 33 on its surface. A motor 34 is fixedly installed on the side wall of the detection pool 5 via a mounting base. The output shaft of the motor 34 is fixedly connected to the end of the hollow shaft 31. Multiple sets of vent holes 35 are formed on the surface of the hollow shaft 31. A vent pipe 36 is fixedly installed on the side wall of the vent hole 35. The heating structure 3 also includes a conical groove 37 formed inside the vent pipe 36. The inner wall of the conical groove 37 is formed... The device is provided with an annular groove 38. Multiple sets of spiral guide ribs 39 are fixedly installed on the inner wall of the vent pipe 36. Protrusions 310 are fixedly installed on the inner wall of the vent pipe 36. Multiple sets of protrusions 310 are provided. The multiple sets of protrusions 310 are fixedly installed on the inner wall of the vent pipe 36 and do not contact the spiral guide ribs 39. Three sets of annular grooves 38 are opened in an array on the inner wall of the conical groove 37. The diameter of the air outlet 35 increases from the side closest to the motor 34 to the other side. The position of the air outlet 35 is adapted to the vent pipe 36. A hot air blower 7 is fixedly installed on the side wall of the detection pool 5. The hot air blower 7 and the cavity are connected through the air inlet pipe 8.

[0026] In one embodiment of this utility model, the detector 1 is the core analytical component for detecting the viscosity of tight oil. It has a built-in viscosity signal processing module and a data display unit, which can quickly receive the signal transmitted by the detection tube 2 and convert it into intuitive viscosity data for easy reading by the operator. The detection tube 2 is a high-precision sensing tubular structure, and its lower end is equipped with a wear-resistant and corrosion-resistant detection probe, which can be directly inserted into the tight oil sample to obtain viscosity parameters. The detection tube 2 and the detector 1 are detachably connected, which facilitates later maintenance and replacement. The detection cell 5 is a closed cavity with an open top, made of heat-insulating material, which can reduce internal temperature loss. Its internal volume can be flexibly adapted according to the amount of sample to be tested, providing a stable detection environment for the tight oil sample. The moving mechanism 6 consists of a linear guide rail, a drive motor and a sliding seat. The drive motor can drive the sliding seat to make a smooth horizontal reciprocating motion along the guide rail. The synchronous movement of the detector 1 and the detection tube 2 is achieved by the drive of the moving mechanism 6, thereby performing multi-point detection of the tight oil sample in different areas of the detection cell 5.

[0027] The hollow shaft 31 is a high-strength, high-temperature resistant tubular structure. Its axis coincides with the horizontal center line of the detection pool 5. Its two ends are rotatably connected to the inner walls of the detection pool 5 through sealed bearings. The sealed bearings not only ensure the airtightness of the detection pool 5 and prevent hot air leakage, but also reduce the frictional resistance when the hollow shaft 31 rotates, ensuring smooth rotation. The annular sleeve 32 is an annular shell fitted on the outside of the hollow shaft 31 and is fixedly connected to the side wall of the detection pool 5 by bolts. A sealing gasket is provided at the connection. The annular sleeve 32 has an annular cavity inside, which provides temporary storage and buffer space for hot air, preventing hot air from directly impacting the hollow shaft 31 and causing airflow instability. The vent 33 can quickly introduce the hot air in the annular sleeve 32 into the hollow shaft 31. The mounting base is an L-shaped metal bracket, which is firmly connected to the side wall of the detection pool 5 by expansion bolts, providing stable support for the motor 34 and preventing vibration of the motor 34 from affecting the stability of the device during operation.

[0028] Motor 34 is a speed-regulating motor. Its output shaft is fixedly connected to the end of hollow shaft 31 via a coupling. The output speed can be adjusted according to heating requirements, thereby controlling the rotation speed of hollow shaft 31. Multiple sets of air outlets 35 are opened on the surface of hollow shaft 31. The air outlets 35 are evenly distributed in a matrix along the axial and circumferential directions of hollow shaft 31 to ensure that hot air can fully cover the inside of detection pool 5. Ventilation pipes 36 are fixedly installed on the side walls of air outlets 35. Ventilation pipes 36 are tubular structures that correspond one-to-one with air outlets 35. They are made of high-temperature resistant plastic. One end of the pipe is connected to the air outlet 35 by a threaded seal, and the other end extends to the sample area inside detection pool 5 to guide and homogenize the hot air.

[0029] The conical groove 37 is located at the end of the vent pipe 36 near the hollow shaft 31. Its inner diameter gradually expands from the side near the hollow shaft 31 to the other side, forming a diffusion channel. It can buffer and divert the hot air entering the vent pipe 36, preventing the airflow velocity from being too fast and causing the local temperature to be too high. Three sets of annular grooves 38 are provided. The three sets of annular grooves 38 are arranged in an equally spaced array on the inner wall of the conical groove 37. Each set of annular grooves 38 is a groove that surrounds the inner wall of the conical groove 37. It can divide the hot air into multiple independent annular airflows, promote the initial mixing of the hot air in the vent pipe 36, and improve the airflow uniformity. The spiral guide rib 39 is a raised rib that extends spirally along the axial direction of the vent pipe 36 and is integrally formed with the inner wall of the vent pipe 36. It can guide the hot air to form a rotating airflow in the vent pipe 36, allowing the hot air to mix fully during the flow process, and further eliminating temperature differences.

[0030] Multiple sets of protrusions 310 are provided, forming a hemispherical structure. These protrusions 310 are irregularly distributed and fixedly installed on the inner wall of the vent pipe 36 without contacting the spiral guide ribs 39. This allows them to turbulent the rotating airflow, breaking the laminar flow state and ensuring that the hot air is mixed without dead angles within the vent pipe 36. This ensures that the temperature of the ejected hot air is uniform. The diameter of the air outlet 35 increases sequentially from the side closest to the motor 34 to the other side. Since the hot air will experience pressure loss due to pipe resistance when flowing within the hollow shaft 31, the airflow pressure is higher at the end closer to the motor 34 and lower at the far end. The design of increasing diameter can balance the airflow of each air outlet 35, ensuring that the airflow of each set of vent pipes 36 remains consistent.

[0031] The position of the air outlet 35 is adapted to the air vent 36 to ensure that the hot air can be completely introduced into the air vent 36 and avoid air leakage. The hot air blower 7 is a constant temperature hot air generator with adjustable temperature. The target temperature can be accurately set according to the testing standards or formation simulation requirements. The hot air blower 7 has a built-in wind speed adjustment module, which can control the output flow rate of the hot air. The hot air blower 7 and the cavity of the annular sleeve 32 are connected through the air inlet pipe 8.

[0032] Please continue reading. Figures 1-6 A cross-shaped diverter 9 is fixedly installed on the side of the vent pipe 36 away from the conical groove 37. The cross-shaped diverter 9 has air outlets 10 with different orientations on all four sides. Arc-shaped air guide vanes 11 are fixedly connected to the ends of the cross arms of the cross-shaped diverter 9. The four sets of arc-shaped air guide vanes 11 are bent in different directions along the circumference of the cross arms.

[0033] In this embodiment of the invention, the cross-shaped diverter 9 has a cross-arm structure and is fixedly connected to the outlet end of the vent pipe 36 by threads. Its interior is hollow, which can further divert and diffuse the hot air vented by the vent pipe 36. The cross-shaped diverter 9 has air outlets 10 with different orientations on all four sides. The air outlets 10 are rectangular openings. The four sets of air outlets 10 face the front, back, left, and right directions of the detection pool 5, respectively, to realize multi-dimensional spraying of hot air and break the limitation of single-direction air supply. The ends of the cross arms of the cross-shaped diverter 9 are fixedly connected to arc-shaped air guides 11. The arc-shaped air guides 11 are arc-shaped sheet structures made of lightweight and high-temperature resistant materials. The four sets of arc-shaped air guides 11 are bent in different directions along the circumference of the cross arms. The bending angle is precisely designed according to the size of the detection pool 5, which can guide the hot air sprayed from the air outlets 10 in a secondary manner. This can further disperse the airflow and avoid local wind speed concentration, and guide the hot air to the corner area of ​​the detection pool 5 to ensure that the hot air is covered without dead angles.

[0034] During operation, the tight oil sample to be tested is first injected into the test tank 5. The target heating temperature is set using the hot air blower 7 according to the testing requirements. The hot air blower 7 is then started, and the hot air generated by it enters the cavity of the annular sleeve 32 through the air inlet pipe 8. Subsequently, the hot air enters the interior of the hollow shaft 31 through the vent 33 on its surface, and then is guided into the corresponding vent pipe 36 through multiple sets of air outlets 35 on the hollow shaft 31. As the hot air flows within the vent pipe 36, it is diffused and buffered by the conical groove 37 and divided into multiple annular airflows by the annular groove 38. Guided by the spiral guide ribs 39, these airflows form a rotating airflow. Simultaneously, the protrusions 310 turbulently disperse the rotating airflow, achieving thorough mixing and homogenization of the hot air. The homogenized hot air enters the cross-shaped distribution hood 9 and is ejected through the air outlets 10 on four sides facing different directions. Under the guidance of the arc-shaped air guide vanes 11, the hot air evenly covers the internal space of the detection pool 5. At the same time, the motor 34 is started, and the motor 34 drives the hollow shaft 31 to rotate at a constant speed, so that multiple sets of air pipes 36 and the cross-shaped distribution hood 9 make circular motions in the detection pool 5, further improving the uniformity of hot air distribution, stabilizing the heating of the dense oil sample to the set temperature and maintaining it. Finally, the moving mechanism 6 is started, and the moving mechanism 6 drives the detector 1 and the detection tube 2 to move above the detection pool 5. The detection tube 2 is inserted into different positions of the dense oil sample, and the viscosity signal is transmitted to the detector 1 to complete the viscosity detection.

[0035] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A device for detecting the viscosity of tight oil, comprising a detector (1), wherein a detection tube (2) is provided at the lower end of the detector (1), a detection pool (5) is provided below the detector (1), and a moving mechanism (6) is provided at the upper end of the detection pool (5), wherein the detector (1) is detachably connected to the upper end of the moving mechanism (6), characterized in that: The detection pool (5) is equipped with a heating structure (3); The heating structure (3) includes a hollow shaft (31) that penetrates the inner wall of the detection pool (5). An annular sleeve (32) is fixedly installed on the side wall of the detection pool (5). A cavity is opened inside the annular sleeve (32). One end of the hollow shaft (31) located outside the detection pool (5) is located inside the annular sleeve (32) and has a vent (33) on its surface. A motor (34) is fixedly installed on the side wall of the detection pool (5) through a mounting base. The output shaft of the motor (34) is fixedly connected to the end of the hollow shaft (31). Multiple sets of air outlets (35) are opened on the surface of the hollow shaft (31). A vent pipe (36) is fixedly installed on the side wall of the air outlet (35).

2. The tight oil viscosity testing device according to claim 1, characterized in that: The heating structure (3) also includes a conical groove (37) inside the vent pipe (36), an annular groove (38) is provided on the inner wall of the conical groove (37), multiple sets of spiral guide ribs (39) are fixedly installed on the inner wall of the vent pipe (36), and a protrusion (310) is fixedly installed on the inner wall of the vent pipe (36).

3. The tight oil viscosity testing device according to claim 2, characterized in that: The protrusion (310) is provided in multiple sets, and the multiple sets of protrusion (310) are fixedly installed on the inner wall of the vent pipe (36) and do not contact the spiral guide rib (39).

4. The tight oil viscosity testing device according to claim 2, characterized in that: The annular groove (38) is provided in three sets, and the three sets of annular grooves (38) are arranged in an array on the inner wall of the conical groove (37).

5. The tight oil viscosity testing device according to claim 1, characterized in that: The diameter of the air outlet (35) increases sequentially from the side closest to the motor (34) to the other side, and the position of the air outlet (35) is adapted to the air pipe (36).

6. The tight oil viscosity testing device according to claim 1, characterized in that: A hot air blower (7) is fixedly installed on the side wall of the detection pool (5), and the hot air blower (7) and the cavity are connected through an air inlet pipe (8).

7. The tight oil viscosity testing device according to claim 1, characterized in that: A cross-shaped diverter hood (9) is fixedly installed on the side of the vent pipe (36) away from the conical groove (37). The cross-shaped diverter hood (9) has air outlets (10) with different orientations on all four sides. Arc-shaped air guide vanes (11) are fixedly connected to the ends of the cross arms of the cross-shaped diverter hood (9). The four sets of arc-shaped air guide vanes (11) are bent in different directions along the circumference of the cross arms.

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