Portable closed rapid sampling device for rock core displacement experiment

Abstract

The utility model belongs to the technical field of petroleum engineering laboratory equipment, and discloses a portable closed quick sampling device for a rock core displacement experiment, which comprises a transparent barrel body, a liquid inlet pipe, a liquid outlet pipe, a liquid inlet pipe and a liquid outlet pipe, the micro pressure release valve is arranged at the top end of the transparent barrel body and is used for balancing internal and external pressure of the transparent barrel body; the anti-backflow quick connection structure is arranged on the outer side of the transparent barrel body and comprises a one-way valve and a quick plugging connector which are connected in sequence, the quick plugging connector is used for being directly connected with an outlet pipeline of external experimental equipment, and the drain valve is arranged at the bottom of the transparent barrel body and used for draining fluid; according to the utility model, through the arrangement of the scale and the rotatable supporting and protecting assembly, full-closed sampling is realized, volatilization, oxidation and pollution are avoided, the accuracy of experimental data is ensured, plugging and unplugging are rapid, pump closing and frequent valve operation are not needed, operation is simple and convenient, and meanwhile, a worker can perform quantitative sampling through cooperation of transparency, visibility and scales.

Description

A portable, sealed, rapid sampling device for core displacement experiments Technical Field

[0001] This utility model belongs to the technical field of petroleum engineering laboratory equipment, and in particular relates to a portable, sealed, rapid sampling device for core displacement experiments. Background Technology

[0002] In core displacement experiments (water flooding, permeability testing, formation fluid experiments), the traditional sampling method is to directly collect samples from open graduated cylinders / beakers. The fluids are easily volatile, easily oxidized, and easily contaminated, leading to inaccurate experimental data.

[0003] Sampling under high temperature and high pressure conditions is prone to splashing and is unsafe. It is also cumbersome to operate and requires frequent valve opening and closing.

[0004] Existing samplers are complex in structure and not portable, making them unsuitable for rapid laboratory sampling and field core sampling processes that cannot achieve full enclosure, visualization, quantification, and rapid insertion and removal. Summary of the Invention

[0005] This invention addresses the problems of existing samplers being complex in structure, inconvenient to carry, unsuitable for rapid laboratory sampling, and unable to achieve fully enclosed, visualized, quantitative, and rapid insertion / removal processes in on-site core sampling experiments. The following technical solution is proposed:

[0006] A portable, sealed, rapid sampling device for core displacement experiments includes: a transparent container for containing and visually observing fluid;

[0007] A backflow prevention quick-connect structure is provided on the outside of the transparent barrel, which includes a one-way valve and a quick-connect connector connected in sequence. The quick-connect connector is used to directly connect to the outlet pipeline of external experimental equipment.

[0008] A drain valve, located at the bottom of the transparent tank, is used to drain fluid; and a rotatable support and protection assembly.

[0009] The supporting and protective assembly includes a rotating ring, which is rotatably fitted onto the transparent barrel body;

[0010] The telescopic component is installed on the rotating ring;

[0011] Extrusion plate, installed on the movable end of the telescopic component;

[0012] Baffle, fixed to the extrusion plate; and

[0013] The barrier block is fixed to the bottom of the outside of the transparent barrel and is located on the side opposite to the drain valve.

[0014] As a preferred embodiment of the above technical solution, the support and protection assembly further includes a protruding plate and a mounting plate;

[0015] The convex plate is integrally formed on the rotating ring, and the telescopic component is installed on the convex plate;

[0016] An mounting plate is connected to the bottom end of the baffle. A rotating groove is provided on the outer side of the transparent barrel, and the rotating ring is rotatably connected to the inside of the rotating groove.

[0017] When the extrusion plate rotates with the rotating ring until it contacts the barrier block, the telescopic member is compressed, causing the extrusion plate and the mounting plate to descend, forming a height difference.

[0018] As a preferred embodiment of the above technical solution, the contact area between the rotating ring and the transparent barrel is provided with damping.

[0019] As a preferred embodiment of the above technical solution, the telescopic component is a spring telescopic rod, and the baffle is shaped like a horizontal line with its top end fitting against the outer side of the transparent barrel.

[0020] As a preferred embodiment of the above technical solution, the top two sides of the extrusion plate are provided with rounded corners, and the bottom two sides of the barrier block are provided with chamfers. The two cooperate with each other to guide the extrusion plate to descend.

[0021] As a preferred embodiment of the above technical solution, the outer wall of the transparent barrel is engraved with scale bars for quantitative sampling, the transparent barrel is made of transparent pressure-resistant material, and a miniature pressure relief valve is placed at the top of the transparent barrel to balance the pressure inside and outside the transparent barrel.

[0022] The beneficial effects of this utility model are as follows:

[0023] (1) Fully enclosed sampling avoids volatilization, oxidation and pollution, ensuring the accuracy of experimental data. It can be quickly plugged in and out without turning off the pump or frequently operating the valve, making it easy to operate. At the same time, the combination of transparency and scale makes it easy for staff to take quantitative samples.

[0024] (2) The rotatable support and protection components are designed in a simple way. Operators can turn the baffle with one hand to quickly switch between the protection state and the drainage support state without disassembling any parts. It is extremely convenient to use. The combination of rounded corners and chamfered bevels automatically triggers the squeezing plate to press down when the baffle is rotated, forming a triangular support structure that tilts the barrel and ensures that the fluid is completely discharged, eliminating residue and cross-contamination. Attached Figure Description

[0025] Figure 1 shows a schematic diagram of a portable, sealed, rapid sampling device for core displacement experiments in Example 1.

[0026] Figure 2 shows a schematic diagram of another view of a portable, closed, rapid sampling device for core displacement experiments in Example 1.

[0027] Figure 3 shows a schematic diagram of the opening structure of the rotating groove in Embodiment 1;

[0028] Figure 4 shows a schematic diagram of the installation structure of the baffle in Embodiment 1.

[0029] In the diagram: 1. Transparent barrel; 2. Miniature pressure relief valve; 3. Check valve; 4. Quick-connect connector; 6. Scale bar; 7. Drain valve; 8. Rotating groove; 9. Rotating ring; 10. Protruding plate; 11. Telescopic component; 12. Squeezing plate; 13. Baffle; 14. Mounting plate; 15. Barrier block. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with the embodiments. Embodiment 1

[0031] This utility model provides a portable, sealed, rapid sampling device for core displacement experiments, as shown in Figures 1 to 4. It includes a transparent barrel 1, which is made of a transparent and pressure-resistant material, preferably one of acrylic, PC (polycarbonate) or stainless steel (with a viewing window), to facilitate observation of the internal liquid level. The outer wall of the transparent barrel 1 is engraved with scale strips 6, which can be used to observe the liquid level height in real time and to achieve quantitative sampling.

[0032] A miniature pressure relief valve 2 is embedded in the top of the transparent barrel 1. Before sampling, the miniature pressure relief valve 2 can be manually opened to balance the pressure inside the barrel with the atmospheric pressure, so as to avoid splashing due to sudden pressure changes when the fluid enters later and ensure operational safety.

[0033] The outer front end of the transparent barrel 1 is connected to a one-way valve 3 via a detachable means (thread or clamp, etc.). The function of the one-way valve 3 is to ensure that the fluid can only enter the interior of the transparent barrel 1 from the outside and cannot flow out in the reverse direction, thereby preventing the collected sample from flowing back and contaminating the upstream pipeline, and at the same time preventing external impurities from flowing back into the transparent barrel 1. The feed end of the one-way valve 3 is also connected to a quick-connect connector 4 via a detachable means. The quick-connect connector 4 is matched with the pipeline at the outlet of the core displacement experimental device. The other end of the quick-connect connector 4 is connected to the pipeline at the outlet of the core displacement experimental device, which can realize quick connection and disconnection in one second. It has the characteristics of being detachable and leak-proof, which greatly facilitates the experimental operation. The above sampling process adopts fully sealed sampling to prevent the leakage of samples.

[0034] A drain valve 7 is installed at the bottom of the outer surface of the transparent barrel 1, which is used to drain the fluid collected inside the transparent barrel 1 after sampling is completed, so as to carry out subsequent analysis or clean the transparent barrel 1.

[0035] As a further embodiment of the above, as shown in Figures 2 to 4, an annular rotating groove 8 is provided at the bottom of the outer surface of the transparent barrel 1. A rotating ring 9 is rotatably connected inside the rotating groove 8. This includes, but is not limited to, "the rotating ring is embedded in the rotating groove to form an annular guide rail structure, or connected by a bearing, or a low-friction coefficient material is provided on the contact surface, etc. The part of the outer surface of the rotating ring 9 that contacts the transparent barrel 1 is provided with a damping structure (such as a rubber ring or elastic protrusion), so that the rotating ring 9 has a damping feel when rotating and can stay at any position."

[0036] An outwardly extending convex plate 10 is integrally formed on the outer surface of the rotating ring 9 and located directly below the drain valve 7. Two telescopic members 11 are symmetrically installed on the top of the convex plate 10. In this embodiment, the telescopic member 11 is preferably a spring telescopic rod. A compression plate 12 is snapped between the movable ends (i.e., telescopic rod ends) of the two telescopic members 11. The top two sides of the compression plate 12 are both processed into rounded corners. A baffle 13 is fixedly installed at the end of the compression plate 12 away from the transparent barrel 1. The baffle 13 is designed in the shape of a horizontal line. Its top part fits against the outer wall of the transparent barrel 1 to form a tight seal and has a guiding function. The bottom end of the baffle 13 is detachably connected (screws or buckles) to a mounting plate 14.

[0037] A barrier block 15 is fixedly installed on the bottom of the outer surface of the transparent barrel 1 and the end away from the one-way valve 3 (i.e. the other side of the transparent barrel 1 opposite to the convex plate 10). The bottom edges of both sides of the outer surface of the barrier block 15 are chamfered. The highest point of the barrier block 15 and the ground is higher than the highest point of the extrusion plate 12 and the ground.

[0038] Working principle: During normal sampling or when idle, the baffle 13 is located at the front end of the outlet of the drain valve 7 and is exactly below the quick-connect connector 4. When the operator pulls the quick-connect connector 4 out of the core displacement experimental device outlet, a small amount of residual fluid may drip from the quick-connect connector 4. At this time, the baffle 13 below can effectively block these dripping fluids and prevent them from splashing onto the operator's hands, thus playing a safety protection role.

[0039] When it is necessary to completely drain the fluid inside the transparent barrel 1, the operator manually moves the baffle 13 to rotate it around the axis of the transparent barrel 1. The baffle 13 drives the rotating ring 9 to rotate synchronously in the rotating groove 8 through the extrusion plate 12, telescopic member 11 and protruding plate 10 fixedly connected to it. When the extrusion plate 12 gradually approaches the barrier block 15 as it rotates, the rounded corner at the top of the extrusion plate 12 first contacts the chamfer of the barrier block 15. As it continues to rotate, under the guidance of the inclined plane, the extrusion plate 12 is pressed downward, thereby compressing the telescopic member 11 (the spring telescopic rod shortens). As the extrusion plate 12 descends, it drives the baffle 13 and the mounting plate 14 fixed to it to descend together, so that a significant height difference is formed between the bottom surface of the mounting plate 14 and the bottom surface of the transparent barrel 1.

[0040] At this time, the operator can tilt the entire transparent barrel 1 toward the side where the drain valve 7 is located. Since the mounting plate 14 has been lowered and supported on the platform, a stable triangular support structure is formed between the bottom edge of the transparent barrel 1 and the bottom corner of the mounting plate 14. This allows the transparent barrel 1 to be steadily tilted. The fluid in the transparent barrel 1 can flow out completely along the drain valve 7 under the action of gravity, effectively preventing sample waste or cross-contamination caused by residue at the bottom of the transparent barrel 1.

[0041] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A portable, sealed, rapid sampling device for core displacement experiments, characterized in that, include: A transparent barrel (1) is used to contain and visualize the fluid. A backflow prevention quick-connect structure is provided on the outside of the transparent barrel (1), which includes a one-way valve (3) and a quick-connect connector (4) connected in sequence. The quick-connect connector (4) is used to directly connect to the outlet pipeline of the external experimental equipment. A drain valve (7) is provided at the bottom of the transparent barrel (1) for draining fluid. A rotatable support and protection assembly is provided, which includes a rotating ring (9) rotatably fitted on the transparent barrel (1). A telescopic member (11) is installed on the rotating ring (9). A squeezing plate (12) is installed on the movable end of the telescopic member (11). A baffle (13) is fixed on the squeezing plate (12). A barrier block (15) is fixed at the bottom outside of the transparent barrel (1) and located on the side opposite to the drain valve (7).

2. The portable, sealed, rapid sampling device for core displacement experiments according to claim 1, characterized in that, The supporting and protective assembly also includes a protruding plate (10) and a mounting plate (14); the protruding plate (10) is integrally formed on the rotating ring (9), and the telescopic component (11) is installed on the protruding plate (10); the mounting plate (14) is connected to the bottom end of the baffle (13), and a rotating groove (8) is opened on the outside of the transparent barrel (1), and the rotating ring (9) is rotatably connected to the inside of the rotating groove (8); when the extrusion plate (12) rotates with the rotating ring (9) to contact the barrier block (15), the telescopic component (11) is compressed, which drives the extrusion plate (12) and the mounting plate (14) to descend, forming a height difference.

3. The portable, sealed, rapid sampling device for core displacement experiments according to claim 2, characterized in that, The contact area between the rotating ring (9) and the transparent barrel (1) is provided with damping.

4. The portable, sealed, rapid sampling device for core displacement experiments according to claim 3, characterized in that, The telescopic component (11) is a spring telescopic rod, and the baffle (13) is shaped like a horizontal bar, with its top end fitting against the outside of the transparent barrel (1).

5. A portable, sealed, rapid sampling device for core displacement experiments according to claim 4, characterized in that, The top two sides of the extrusion plate (12) are rounded, and the bottom two sides of the barrier block (15) are chamfered. The two work together to guide the extrusion plate (12) to descend.

6. The portable, sealed, rapid sampling device for core displacement experiments according to claim 1, characterized in that, The outer wall of the transparent barrel (1) is engraved with a scale bar (6) for quantitative sampling. The transparent barrel (1) is made of transparent pressure-resistant material. A miniature pressure relief valve (2) is placed at the top of the transparent barrel (1) to balance the pressure inside and outside the transparent barrel (1).

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