Multi-channel small-liquid-amount automatic separating and metering device and using method thereof

Abstract

The invention discloses a multi-channel small-liquid-amount automatic separating and metering device and a using method thereof. The multi-channel small-liquid-amount automatic separating and metering device comprises a rack mechanism, a transverse moving mechanism, a camera shooting mechanism, a plurality of clamping devices and a metering mechanism connected with outlets of the clamping devices. The rack mechanism comprises a lower bottom box and an upper frame arranged on the top face of the lower bottom box. A glass tube positioning cross beam is fixed at the lower part of the upper frame; the transverse moving mechanism comprises a transverse moving driving motor, a transverse moving sliding rail fixed to the clamping device bearing beam and a sliding block connected with the transverse moving sliding rail in a sliding mode. The camera shooting mechanism comprises a transverse moving frame, and a camera and a camera shooting light source plate which are fixed on the transverse moving frame; the multiple clamping devices are evenly distributed on the front side of the clamping device bearing beam. The metering mechanism comprises a metering glass tube and a glass tube plug buckled with the top end of the metering glass tube; a glass inlet pipe and a vent pipe are respectively inserted into the glass pipe plug; the bottom end of the glass inlet pipe is connected with the microflow guide pipe. The device is small in metering dead volume and extremely high in resolution ratio, and the problem of ultramicro metering is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of oil and gas exploration and production, and particularly relates to a multi-channel small liquid volume automatic separation and metering device and a using method thereof. Background Art

[0002] In recent years, the world's oil industry has increasingly focused on the exploration and development of ultra-low permeability, tight oil and gas, and deep coal and shale reservoir oil and gas, resulting in a greatly increased demand for low-permeability and tight core experimental research in the field of oil and gas exploration and production. Due to the tightness of the test cores, the core porosity is low, and the saturated water volume is small, usually within 1 mL, or even within 0.5 mL. The small water content makes the outlet metering of the displacement test a difficult problem. Moreover, due to the excessive tightness of the cores, the displacement time is very long. The test of one sample usually takes several days, several weeks, or even several months to complete. In the case of a large number of samples and heavy tasks, the laboratory needs to purchase many sets of the same or similar experimental devices, resulting in a large cost investment.

[0003] Existing micro-liquid volume metering devices, such as a micro-liquid volume metering device based on MEMS technology disclosed in the invention patent with the application publication number CN201787991U, have problems of low efficiency during operation and instability of the MEMS micro-structure pressure sensor; a point-by-point scanning micro-liquid volume metering device disclosed in the invention patent with the application publication number CN201795937U has problems of low efficiency during operation and long time consumption.

[0004] Therefore, there is an urgent need to propose a metering device to effectively solve problems such as inaccurate metering and long experimental time. Summary of the Invention

[0005] The present invention is proposed to solve the problems existing in the prior art, and its purpose is to provide a multi-channel small liquid volume automatic separation and metering device and a using method thereof.

[0006] The present invention is achieved through the following technical solutions:

[0007] A multi-channel small liquid volume automatic separation and metering device, comprising a frame mechanism, a transverse movement mechanism, a camera mechanism, a plurality of grippers, and a metering mechanism connected to the outlet of the gripper; the frame mechanism includes a lower bottom box and an upper frame arranged on the top surface of the lower bottom box; a gripper bearing beam is fixedly arranged horizontally in the middle of the upper frame, and a glass tube positioning cross beam is fixedly arranged horizontally at its lower part; the transverse movement mechanism includes a transverse movement driving motor, a transverse movement slide rail fixed to the gripper bearing beam, and a slider slidably connected to the transverse movement slide rail; the camera mechanism includes a transverse movement frame and a camera and a camera light source board fixed on the transverse movement frame; a plurality of the grippers are evenly distributed on the front side of the gripper bearing beam; the metering mechanism includes a metering glass tube and a glass tube plug buckled on the top end of the metering glass tube; two vertically opened through holes are formed on the glass tube plug, a glass inlet tube is inserted into one through hole, and a vent tube is inserted into the other through hole; the bottom end of the glass inlet tube is connected to a microfluid guiding tube.

[0008] In the above technical solution, the gripper bearing beam and the glass tube positioning cross beam are parallel to each other, and a gap is provided between the glass tube positioning cross beam and the top surface of the lower bottom box.

[0009] In the above technical solution, a plurality of positioning holes are provided at the top of the glass tube positioning cross beam, and the number of positioning holes is the same as the number of grippers and corresponds to the positions of the gripper outlets one by one.

[0010] In the above technical solution, the transverse movement frame is arranged perpendicular to the glass tube positioning cross beam and is located below the glass tube positioning cross beam.

[0011] In the above technical solution, the camera light source board is vertically fixed on the transverse movement frame; the camera is fixed on the transverse movement frame through a camera bracket, the camera and the camera light source board are arranged opposite to each other, and a gap is provided between the two; the camera light source board is arranged on the front side of the gripper, and the camera bracket is arranged on the rear side of the gripper.

[0012] In the above technical solution, the camera bracket and the slider are connected through a connecting piece.

[0013] In the above technical solution, the outlet of the gripper is located above the glass tube positioning cross beam.

[0014] In the above technical solution, the metering glass tube is vertically arranged, and its bottom end is placed in the positioning hole on the top surface of the glass tube positioning cross beam; a metering tube sealing ring is sleeved outside the glass tube plug, and the metering tube sealing ring is placed between the outer wall of the glass tube plug and the inner wall of the metering glass tube; the top end of the glass inlet tube is communicated with the gripper outlet tube through a transition silica gel tube; the bottom end of the microfluid guiding tube is directly inserted below the liquid level; the vent tube is in an L shape.

[0015] A usage method of a multi-channel small liquid volume automatic separation and metering device, comprising the following steps:

[0016] (Ⅰ) Pre-charging the liquid level of the metering glass tube

[0017] Clean each metering glass tube and inject clear water through the glass tube inlet tube with a syringe.

[0018] (Ⅱ) Installation of the metering glass tube

[0019] Put a transition silicone tube on the top of each metering glass tube and connect the transition silicone tube to the outlet tube of the gripper to achieve a reliable connection between the glass metering tube and the outlet tube of the gripper. The lower end of the metering glass tube is seated in the positioning hole of the glass tube positioning crossbeam to ensure that the glass tube is vertical.

[0020] (Ⅲ) Start the test and initiate channel inspection

[0021] The camera mechanism moves horizontally to position and photograph the liquid level values of the metering glass tubes in each channel, calculate the increment from the initial liquid level value, and record the data.

[0022] In the above technical solution, the injection volume of clear water in step (Ⅰ) is such that the liquid level reaches 10 mm.

[0023] The beneficial effects of the present invention are as follows:

[0024] The present invention provides a multi-channel small liquid volume automatic separation metering device and its usage method. The metering dead volume of the metering device is small. The fluid at the core outlet passes through the outlet tube of the gripper, the transition silicone tube, the glass inlet tube, and the micro-drainage tube to reach the metering glass tube, and then is recognized by the camera, only experiencing the smallest pipeline space, with a dead volume of only 0.03 mL, which cannot be achieved by other automatic metering devices; the metering device solves the problem of ultra-trace metering. The inner diameter of the metering glass tube is 4 mm, the outer diameter of the micro-fluid guiding tube is 0.8 mm, and the effective cross-sectional area is 15.36 mm 2 , and the volume corresponding to a 1 mm height is 0.015 mL, while the camera recognition accuracy reaches 0.1 mm, so the metering resolution can reach 0.0015 mL, which also cannot be achieved by other metering devices; the metering device has extremely high resolution. The calculated resolution of 0.0015 mL plus the micro-fluid guiding tube enables the fluid to flow directly below the liquid level after coming out of the core, avoiding the adhesion or dripping of the outflow liquid on the wall, providing a strong guarantee for high-precision metering. Description of the drawings

[0025] Figure 1 is a perspective view (main view) of the present invention;

[0026] Figure 2 is a structural schematic diagram of the camera tracking system in the present invention;

[0027] Figure 3 is a side view of the camera tracking system in the present invention;

[0028] Figure 4It is a schematic structural diagram of the metering glass tube in the present invention;

[0029] Figure 5 It is a cumulative water production curve graph of the present invention.

[0030] Wherein:

[0031] 1. Frame mechanism; 11. Lower bottom box; 12. Upper frame; 121. Clamp bearing beam; 122. Glass tube positioning cross beam;

[0032] 2. Transverse movement mechanism; 21. Transverse movement drive motor; 22. Transverse movement slide rail; 23. Slide block;

[0033] 3. Camera mechanism; 31. Camera; 32. Camera light source board; 33. Transverse movement frame; 34. Camera frame;

[0034] 4. Clamp; 41. Clamp outlet pipe;

[0035] 5. Metering mechanism; 51. Metering glass tube; 52. Glass tube plug; 53. Metering tube sealing ring; 54. Glass inlet pipe; 55. Microfluid guiding tube; 56. Vent pipe; 57. Transition silica gel tube.

[0036] For those of ordinary skill in the art, without creative efforts, other related drawings can be obtained based on the above drawings. Detailed implementation manners

[0037] In order to enable those in the technical field to better understand the technical solution of the present invention, the technical solution of the present invention will be further described below in conjunction with the specification drawings and through specific implementation manners.

[0038] As Figures 1 to 4 shown, a multi-channel small liquid volume automatic separation metering device includes a frame mechanism 1, a transverse movement mechanism 2, a camera mechanism 3, a plurality of clamps 4, and a metering mechanism 5 connected to the outlet of the clamp 4;

[0039] The frame mechanism 1 includes a lower bottom box 11 and an upper frame 12 arranged on the top surface of the lower bottom box 11;

[0040] The lower bottom box 11 is a hollow cabinet body, with an openable cabinet door arranged on its front side, and universal wheels arranged at the four corners of its bottom;

[0041] A horizontally arranged clamp bearing beam 121 is fixed in the middle of the upper frame 12, and a horizontally arranged glass tube positioning cross beam 122 is fixed at its lower part. The clamp bearing beam 121 and the glass tube positioning cross beam 122 are parallel to each other, and a gap is provided between the glass tube positioning cross beam 122 and the top surface of the lower bottom box 11; a plurality of positioning holes are arranged at the top of the glass tube positioning cross beam 122, and the number of positioning holes is the same as the number of clamps 4 and corresponds to the outlet positions of the clamps 4 one by one;

[0042] In this embodiment, the upper frame 12 includes two parallel side brackets, an upper cross frame fixed to the tops of the two side brackets, and a middle cross frame arranged between the two side brackets; the side brackets, the upper cross frame and the middle cross frame are all of a Japanese-shaped structure; the bottom of the side bracket is welded and fixed to the top surface of the lower bottom box 11, the two ends of the middle cross frame are welded and fixed to the left and right side brackets, and the middle cross frame is arranged parallel to the top surface of the lower bottom box 11; the clamper load-bearing beam 121 is fixed to the front end of the middle cross frame, and the left and right ends of the clamper load-bearing beam 121 are welded and fixed to the two side brackets; the two ends of the glass tube positioning beam 122 are respectively welded and fixed to the two side brackets;

[0043] The transverse movement mechanism 2 includes a transverse movement driving motor 21, a transverse movement slide rail 22 fixed to the clamper load-bearing beam 121, and a slider 23 slidably connected to the transverse movement slide rail 22;

[0044] The transverse driving motor 21 is connected via a flange on the driving slider 23 to drive the gear shaft, which is installed on the driving slider 23 via a bearing. The transverse sliding rail 22 is a rack structure. The gear shaft driven by the driving motor 21 forms a meshing relationship with the rack on the transverse sliding rail. Driven by the driving motor 21, the driving slider 21 moves horizontally left and right on the transverse sliding rail 22. The function of the transverse driving motor 21 driving the slider 23 to move horizontally left and right along the transverse sliding rail 22 is a conventional design and can also be implemented by using a commercially available transverse sliding rail.

[0045] In this embodiment, the transverse slide rail 22 is fixed to the bottom surface of the clamper load-bearing beam 121 and is arranged with the front side facing downward; the slider 23 is arranged on the front side of the transverse slide rail 22;

[0046] The camera mechanism 3 includes a camera 31, a camera light source board 32 and a transverse frame 33; the transverse frame 33 is arranged perpendicular to the glass tube positioning beam 122 and is located below the glass tube positioning beam 122;

[0047] The camera light source plate 32 is vertically fixed on the transverse frame 33;

[0048] The camera 31 is fixed on the transverse frame 33 through the camera frame 34. The camera 31 and the imaging light source board 32 are arranged opposite to each other, and a gap is arranged between them. The imaging light source board 32 is arranged on the front side of the clamp 4, and the camera frame 34 is arranged on the rear side of the clamp 4.

[0049] The camera frame 34 is connected to the slider 23 via a connecting piece. When the slider 23 moves horizontally along the horizontal sliding rail 22, it simultaneously drives the camera frame 34 to move horizontally, thereby driving the horizontal moving frame 33 fixedly connected to the camera frame 34 to move horizontally, thereby achieving synchronous movement of the camera 31 fixed on the horizontal moving frame 33 and the camera light source board 32;

[0050] A plurality of the holders 4 are arranged side by side and evenly distributed on the front side of the holder bearing beam 121, and the outlet of the holder 4 is located above the glass tube positioning cross beam 122; the upper part of the holder 4 is the holder inlet, and its lower part is the holder outlet;

[0051] In this embodiment, the holder is selected as the core holder TY series of Haian County Petroleum Scientific Research Instruments Co., Ltd.;

[0052] The metering mechanism 5 includes a metering glass tube 51 and a glass tube plug 52 buckled on the top end of the metering glass tube 51; two vertically opened through holes are formed on the glass tube plug 52, a glass inlet tube 54 is inserted into one through hole, and a breather tube 56 is inserted into the other through hole; the bottom end of the glass inlet tube 54 is connected to a microfluid guiding tube 55;

[0053] The metering glass tube 51 is vertically arranged, and its bottom end is placed in the positioning hole on the top surface of the glass tube positioning cross beam 122; the inner diameter of the metering glass tube 51 is 4 mm, the effective length is 100 mm, the upper end is open, and the lower end is a blind end;

[0054] A metering tube sealing ring 53 is sleeved outside the glass tube plug 52, and the metering tube sealing ring 53 is placed between the outer wall of the glass tube plug 52 and the inner wall of the metering glass tube 51;

[0055] The top end of the glass inlet tube 54 is communicated with the holder outlet tube 41 through a transition silica gel tube 57;

[0056] The bottom end of the microfluid guiding tube 55 is directly inserted below the liquid level to prevent the liquid flow from dripping down from the inlet tube and sticking to the tube wall, thereby affecting the metering; the outer diameter of the microfluid guiding tube 55 is 1 mm, and the inner diameter is 0.5 mm;

[0057] The breather tube 56 is in an L shape.

[0058] Embodiment 2

[0059] A method for using the multi-channel small liquid volume automatic separation and metering device described in Embodiment 1 includes the following steps:

[0060] (Ⅰ) Pre-charging the liquid level of the metering glass tube 51

[0061] Clean each metering glass tube 51, and inject a little clear water through the glass tube inlet tube 54 with a syringe until the liquid level reaches about 10 mm from the bottom;

[0062] (Ⅱ) Installation of the metering glass tube 51

[0063] Put a transition silica gel tube 57 on the top of each metering glass tube 5, and connect the transition silica gel tube 57 to the clamp outlet tube 41 to achieve a reliable connection between the glass metering tube 51 and the clamp outlet tube 41. The lower end of the metering glass tube 51 is seated in the positioning hole of the glass tube positioning cross beam 122 to ensure that the glass tube is vertical;

[0064] (Ⅲ) Start the test and initiate channel inspection

[0065] The camera mechanism moves horizontally and positions to photograph the liquid level value of each channel's metering glass tube 51, calculates the increment with the initial liquid level value, and records the data;

[0066] The camera 31 and the camera light source board 32 move synchronously to align with the combination of the glass metering tube 51 of the specified channel. The camera light source board 32 illuminates the liquid level of the glass tube, and the camera 31 captures the liquid surface video and transmits it to the computer in real time. The computer's internal software performs image analysis to automatically calculate the liquid surface height, thereby measuring the real-time water production;

[0067] (Ⅳ) Post-test processing:

[0068] After the test, disassemble each metering glass tube 51 in sequence, draw out the liquid inside, clean it, and prepare it for the next use.

[0069] Figure 5 Figure Figure 5 It can be seen that the measured water production increases continuously over time, with a rapid increase in the early stage and a gradual stabilization in the later stage, which conforms to the objective law. The curve has very small ripples, indicating that this metering method has high metering accuracy and verifies the superiority of this method.

[0070] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more.

[0071] In the description of the present invention, it should be noted that, unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific circumstances.

[0072] The applicant claims that the above description is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily conceived by any person skilled in the art within the technical scope disclosed by the present invention fall within the protection scope and the disclosure scope of the present invention.

Claims

1. A multi-channel small liquid volume automatic separation and metering device, characterized in that: It includes a frame mechanism (1), a transverse movement mechanism (2), a camera mechanism (3), multiple grippers (4), and a metering mechanism (5) connected to the outlet of the gripper (4); the frame mechanism (1) includes a lower bottom box (11) and an upper frame (12) arranged on the top surface of the lower bottom box (11); a gripper bearing beam (121) arranged horizontally is fixed in the middle of the upper frame (12), and a glass tube positioning cross beam (122) arranged horizontally is fixed at its lower part; the transverse movement mechanism (2) includes a transverse movement driving motor (21), a transverse movement slide rail (22) fixed to the gripper bearing beam (121), and a slider (23) slidably connected to the transverse movement slide rail (22); the camera mechanism (3) includes a transverse movement frame (33), a camera (31) and a camera light source board (32) fixed on the transverse movement frame (33); multiple grippers (4) are evenly distributed on the front side of the gripper bearing beam (121); the metering mechanism (5) includes a metering glass tube (51) and a glass tube plug (52) buckled on the top end of the metering glass tube (51); two vertically opened through holes are formed on the glass tube plug (52), a glass inlet tube (54) is inserted into one through hole, and a breather tube (56) is inserted into the other through hole; the bottom end of the glass inlet tube (54) is connected to a microfluid guiding tube (55).

2. The multi-channel small liquid volume automatic separation and metering device according to claim 1, wherein: The gripper bearing beam (121) is parallel to the glass tube positioning cross beam (122), and a gap is provided between the glass tube positioning cross beam (122) and the top surface of the lower bottom box (11).

3. The multi-channel small liquid volume automatic separation and metering device according to claim 1, characterized in that: Multiple positioning holes are provided at the top of the glass tube positioning cross beam (122), and the number of positioning holes is the same as the number of grippers (4) and corresponds to the outlet positions of the grippers (4) one by one.

4. The multi-channel small liquid volume automatic separation and metering device according to claim 1, wherein: The transverse movement frame (33) is arranged perpendicular to the glass tube positioning cross beam (122) and is located below the glass tube positioning cross beam (122).

5. The multi-channel small liquid volume automatic separation and metering device according to claim 1, wherein: The camera light source board (32) is vertically fixed on the transverse movement frame (33); the camera (31) is fixed on the transverse movement frame (33) through a camera frame (34), the camera (31) is arranged opposite to the camera light source board (32), and a gap is provided between the two; the camera light source board (32) is arranged on the front side of the gripper (4), and the camera frame (34) is arranged on the rear side of the gripper (4).

6. The multi-channel small liquid volume automatic separation and metering device according to claim 5, characterized in that: The camera frame (34) and the slider (23) are connected through a connecting piece.

7. The multi-channel small liquid volume automatic separation and metering device according to claim 1, characterized in that: The outlet of the gripper (4) is located above the glass tube positioning cross beam (122).

8. The multi-channel small liquid volume automatic separation and metering device according to claim 1, characterized in that: The metering glass tube (51) is arranged vertically, and its bottom end is placed in the positioning hole on the top surface of the glass tube positioning cross beam (122); a metering tube sealing ring (53) is sleeved outside the glass tube plug (52), and the metering tube sealing ring (53) is placed between the outer wall of the glass tube plug (52) and the inner wall of the metering glass tube (51); the top end of the glass inlet tube (54) is communicated with a gripper outlet tube (41) through a transition silica gel tube (57); the bottom end of the microfluid guiding tube (55) is directly inserted below the liquid level; the breather tube (56) is in an L shape.

9. A method for using the multi-channel small liquid volume automatic separation and metering device according to any one of claims 1 to 8, characterized in that: It includes the following steps: (Ⅰ) Pre-charging the liquid level of the metering glass tube Clean each metering glass tube, and inject clear water through the glass tube inlet tube with a syringe. (Ⅱ) Installation of metering glass tubes Put transition silica gel tubes on the tops of each metering glass tube, and connect the transition silica gel tubes to the outlet tubes of the gripper to achieve a reliable connection between the glass metering tube and the outlet tube of the gripper. The lower end of the metering glass tube is seated in the positioning hole of the glass tube positioning crossbeam to ensure that the glass tube is vertical; (Ⅲ) Start the test and initiate channel inspection The camera mechanism moves horizontally and positions to photograph the liquid level values of the metering glass tubes in each channel, calculates the increment with the initial liquid level value, and records the data.

10. The method for using the multi-channel small liquid volume automatic separation and metering device according to claim 9, characterized in that: In the step (Ⅰ), the injection volume of clear water is such that the liquid level reaches 10 mm.

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