Multi-displacement-channel automatic switching device and using method thereof

Abstract

The invention discloses a multi-displacement-channel automatic switching device and a using method thereof. The device comprises a rack mechanism, an air source, a clamping system, an injection system and an annular pressure system. The rack mechanism comprises a lower bottom box and an upper frame arranged on the top face of the lower bottom box. The upper frame comprises an outer frame and a middle cross frame arranged in the middle of the outer frame; a mask is arranged at the top of the middle cross frame; the injection system is arranged on the mask; a clamp holder bearing beam is arranged on the front side of the middle cross frame, and the clamping system is fixed on the clamp holder bearing beam; the annular pressure system comprises an annular pressure pump, an annular pressure bus, an annular pressure relief bus and a plurality of annular pressure valve units. According to the invention, batch and peak shifting arrangement of sample tests is realized by one instrument, excessive waiting of samples is avoided, the investment is reduced, and the efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the field of oil and gas exploration and production, and in particular relates to a multi-displacement channel automatic switching device and a use method thereof. Background Art

[0002] Core flooding tests are common in scientific research experiments in oil and gas exploration and production. These tests typically involve a displacement source, an injection system, an annular pressure system, and a gripper system. Testing a single sample typically takes days, weeks, or even months to complete. When dealing with a large number of samples and a heavy workload, a laboratory must purchase numerous sets of identical or similar experimental equipment, resulting in significant costs. Summary of the Invention

[0003] The present invention is proposed to solve the problem of insufficient efficiency of a single-channel displacement system in the prior art, and its purpose is to provide a multi-displacement channel automatic switching device and a method of using the same.

[0004] The present invention is achieved through the following technical solutions:

[0005] A multi-displacement channel automatic switching device includes a frame mechanism, an air source, a clamping system, an injection system and an annular pressure system;

[0006] The frame structure includes a lower bottom box and an upper frame arranged on the top surface of the lower bottom box; the upper frame includes an outer frame and a middle cross frame arranged in the middle of the outer frame; a cover plate is provided on the top of the middle cross frame, and the injection system is provided on the cover plate; a clamper load-bearing beam is provided on the front side of the middle cross frame, and the clamping system is fixed on the clamper load-bearing beam;

[0007] The injection system includes multiple injection units, each of which includes a front-end automatic valve, a gas pressure regulating valve, and an injection pressure sensor. One end of the front-end automatic valve is connected to the gas source bus through a gas source branch line, and the other end is connected to the gas pressure regulating valve through a pipeline. The other end of the gas pressure regulating valve is connected to the inlet of the clamp through a pipeline, and an injection pressure sensor is provided on the pipeline between the gas pressure regulating valve and the inlet of the clamp;

[0008] The ring pressure system includes a ring pressure pump, a ring pressure bus, a ring pressure relief bus and multiple groups of ring pressure valve units, and the ring pressure valve units include a ring pressure loading valve and a ring pressure relief valve; the outlet of the ring pressure pump is connected to one end of the ring pressure bus, and the other end of the ring pressure bus is connected to multiple ring pressure branches, the other end of the ring pressure branch is connected to the ring pressure loading valve, the other end of the ring pressure loading valve is connected to the ring pressure loading port at the waist of the clamp through a pipeline, and a ring pressure sensor is arranged on the pipeline between the ring pressure loading valve and the inlet of the clamp; one end of the ring pressure relief valve is connected to the ring pressure relief port of the clamp through a pipeline, and the other end is connected to the ring pressure relief bus through a pipeline, and the other end of the ring pressure relief bus is connected to the water storage tank.

[0009] In the above technical solution, the lower bottom box is a hollow cabinet body with an openable and closable cabinet door on the front side and universal wheels at the four corners of the bottom; an air source inlet is provided at the lower back of the lower bottom box.

[0010] In the above technical solution, the gas source is a gas cylinder or a centralized gas supply pipeline terminal, the gas source is placed on the right side or behind the periphery of the rack mechanism, and the gas source is connected to the gas source inlet of the lower bottom box through a gas source bus.

[0011] In the above technical solution, the clamping system includes multiple vertically arranged clamps, which are fixed on the clamp load-bearing beam; the upper part of the clamp is the clamp inlet, which is connected to the injection system; the lower part of the clamp is the clamp outlet; and the clamp outlet is connected to the metering device.

[0012] In the above technical solution, the number of the injection units is the same as the number of the clamps, and the number of the annular pressure valve units is the same as the number of the clamps.

[0013] In the above technical solution, the annular pressure pump is arranged in the lower bottom box; the annular pressure loading valve and the annular pressure relief valve are arranged on the middle cross frame of the upper frame.

[0014] A method for using a multi-displacement channel automatic switching device comprises the following steps:

[0015] (I) Preparation for ring pressing

[0016] Install the core into each channel holder in turn, open the annular pressure relief valve, release the annular pressure of the core holder, and lead the released liquid to the water storage tank through the annular pressure relief bus to ensure that the air outside the core holder rubber sleeve is completely discharged. Then close the annular pressure relief valve and open the annular pressure loading valve; collect the values of the injection pressure sensor and the annular pressure sensor, start the annular pressure pump according to the annular pressure difference set by the system, and control the annular pressure of this channel. After the annular pressure reaches the specified value, close the annular pressure loading valve;

[0017] (II) Start channel test and track ring pressure

[0018] After the ring pressure of each channel is prepared, open the front-end automatic valve of each clamp in turn, then open the gas pressure regulating valve of each clamp in turn, and start the test of each channel;

[0019] (III) Start data recording

[0020] After each channel is started, experimental data is collected;

[0021] (IV) End of the experiment

[0022] When a channel reaches the end condition, the test of that channel ends. After all channels have finished testing, the gas pressure regulating valves of each clamp are closed in sequence, and then the front-end automatic valves of each clamp are closed. The ring pressure relief valves of each clamp are opened, and the operation of the entire device ends.

[0023] (V) Unloading the core

[0024] After the test, the metering device connected to the holder outlet was removed and the core was unloaded.

[0025] The beneficial effects of the present invention are:

[0026] The present invention provides a multi-displacement channel automatic switching device and a method for using the same. Each clamp is equipped with a channel control valve, a pressure controller, an injection pressure sensor, an annular pressure sensor, an annular pressure loading valve, and an annular pressure relief valve, while sharing the injection system and the annular pressure system. Multiple channels can be opened or closed through their respective channel control valves, the injection system can be connected or disconnected, and the annular pressure system can be used in turn to track the annular pressure. According to user needs, when certain channels are put into test, the test can be started in a timely manner, and the time for each channel to be put into test and the time for ending the test can be independently arranged, so that one instrument can be used for batch and staggered sample testing. Excessive waiting for samples can be avoided, investment can be reduced, and efficiency can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a front view of the present invention;

[0028] Figure 2 It is a rear view of the present invention;

[0029] Figure 3 It is a schematic diagram of the present invention.

[0030] in:

[0031] 1. Frame mechanism; 11. Lower base box; 12. Upper frame; 13. Clamp bearing beam;

[0032] 2. Gas source;

[0033] 3. Clamp;

[0034] 41. Front-end automatic valve; 42. Gas pressure regulating valve; 43. Injection pressure sensor;

[0035] 51. Annular pressure pump; 52. Annular pressure loading valve; 53. Annular pressure relief valve; 54. Annular pressure sensor;

[0036] 6. Water storage tank.

[0037] For ordinary technicians in this field, other relevant drawings can be obtained based on the above drawings without any creative work. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0039] like Figures 1 to 3 As shown, a multi-displacement channel automatic switching device includes a frame mechanism 1, an air source 2, a clamping system, an injection system and an annular pressure system;

[0040] 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;

[0041] The lower bottom box 11 is a hollow cabinet with an openable and closable cabinet door on the front and universal wheels at the four corners of the bottom. The lower back of the lower bottom box 11 is provided with an air source inlet for the air source 2.

[0042] The upper frame 12 includes an outer frame and a middle cross frame arranged in the middle of the outer frame; a mask is arranged on the top of the middle cross frame, and the injection system is arranged on the mask; a clamp bearing beam 13 is arranged on the front side of the middle cross frame;

[0043] In this embodiment, the outer frame of the upper frame 12 includes two parallel side brackets on the left and right and 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, upper cross frame and middle cross frame are all of a Japanese-shaped structure; the bottom of the side brackets is welded and fixed to the top surface of the lower bottom box 11, and 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 left and right ends of the clamper load-bearing beam 13 are welded and fixed to the two side brackets;

[0044] The gas source 2 is a gas cylinder or a terminal of a centralized gas supply pipeline. The gas source 2 is placed on the right side or behind the periphery of the frame mechanism 1. The gas source 2 is connected to the gas source inlet of the lower bottom box 11 through a gas source bus. The gas source bus between the gas source 2 and the gas source inlet of the lower bottom box 11 is arranged at the rear edge of the middle horizontal frame.

[0045] The clamping system includes a plurality of vertically arranged clamps 3, which are fixed on the clamp bearing beam 13; the upper portion of the clamp 3 is the clamp inlet, which is connected to the injection system; the lower portion of the clamp 3 is the clamp outlet; and the clamp outlet is connected to the metering device;

[0046] In this embodiment, the clamp is the core clamp TY series produced by Haian County Petroleum Research Instrument Co., Ltd.

[0047] The injection system includes multiple injection units, the number of which is the same as the number of the clampers 3. The injection units include a front-end automatic valve 41, a gas pressure regulating valve 42, and an injection pressure sensor 43. One end of the front-end automatic valve 41 is connected to the gas source bus through a gas source branch line, and the other end is connected to the gas pressure regulating valve 42 through a pipeline. The other end of the gas pressure regulating valve 42 is connected to the inlet of the upper end of the clamper 3 through a pipeline, and the injection pressure sensor 43 is provided on the pipeline between the gas pressure regulating valve 42 and the inlet of the clamper 3.

[0048] The ring pressure system includes a ring pressure pump 51, a ring pressure bus, a ring pressure relief bus, and multiple ring pressure valve units. The number of the ring pressure valve units is the same as the number of the clampers 3. The ring pressure valve units include a ring pressure loading valve 52 and a ring pressure relief valve 53.

[0049] The annular pressure pump 51 is arranged in the lower bottom box 11;

[0050] The annular pressure loading valve 52 and the annular pressure relief valve 53 are arranged on the middle cross frame of the upper frame 12;

[0051] The outlet of the ring pressure pump 51 is connected to one end of the ring pressure bus, the other end of the ring pressure bus is connected to multiple ring pressure branches, the other end of the ring pressure branch is connected to the ring pressure loading valve 52, the other end of the ring pressure loading valve 52 is connected to the ring pressure loading port at the waist of the clamp 3 through a pipeline, and a ring pressure sensor 54 is arranged on the pipeline between the ring pressure loading valve 52 and the inlet of the clamp 3; one end of the ring pressure relief valve 53 is connected to the ring pressure relief port of the clamp 3 through a pipeline, and the other end is connected to the ring pressure relief bus through a pipeline, and the other end of the ring pressure relief bus is connected to the water storage tank 6.

[0052] The multiple channels of the ring pressure system are opened or closed by respective channel control valves to connect or disconnect the injection system, thereby realizing the ring pressure tracking by using the ring pressure system in turn.

[0053] The present invention is combined with a computer program to realize when each channel is connected to and when it is exited from the test system. Since the test progress of samples in each channel is different, the computer program can timely manage the actions of each channel sample at each stage according to the test progress of each channel sample, such as ring pressure tracking and pressure replenishment, data recording, and end of channel test; it can also start the test at the time when certain channels are put into test according to user needs, and the time when each channel is put into test and the time when the test is ended are independently arranged, so that one instrument can be used for batch and staggered sample testing; the entire working process is automatically controlled by a computer program, which avoids excessive waiting for samples, reduces investment, and improves efficiency.

[0054] Example 2

[0055] A method for using a multi-displacement channel automatic switching device comprises the following steps:

[0056] (I) Preparation for ring pressing

[0057] Each channel holder 3 is sequentially loaded with a core, and the annular pressure relief valve 53 is opened to release the annular pressure of the core holder 3. The released liquid is led to the water storage tank 6 via the annular pressure relief bus to ensure that the air outside the rubber sleeve of the core holder 3 is completely exhausted. Then, the annular pressure relief valve 53 is closed and the annular pressure loading valve 52 is opened. The values of the injection pressure sensor 43 and the annular pressure sensor 54 are collected. According to the annular pressure difference set by the system, the annular pressure pump 51 is started to control the annular pressure of the channel. When the annular pressure reaches the specified value, the annular pressure loading valve 52 is closed. At this point, the annular pressure preparation is completed. Then, other channels are automatically prepared in sequence according to the channel sequence pre-selected by the user.

[0058] (II) Start channel test and track ring pressure

[0059] After the ring pressure preparation of each channel is completed, the front end automatic valve 41 of each clamper 3 is opened in sequence, and then the gas pressure regulating valve 42 of each clamper 3 is opened in sequence to start the test of each channel;

[0060] The lithology of the cores loaded in each channel is different. As the displacement test progresses, the values of the injection pressure sensors 43 in each channel will vary. At different times, the difference between the annular pressure and the internal pressure will exceed the set annular pressure difference. In a manner similar to the annular pressure preparation, each channel will be inspected, tracked, and supplemented in turn.

[0061] (III) Start data recording

[0062] After each channel is started, experimental data is collected;

[0063] (IV) End of the experiment

[0064] When a channel reaches the end condition, the test of the channel ends. After all channels have finished testing, the gas pressure regulating valve 42 of each clamper 3 is closed in sequence, and then the front end automatic valve 41 of each clamper 3 is closed, and the ring pressure relief valve 53 of each clamper 3 is opened, and the operation of the entire device ends.

[0065] (V) Unloading the core

[0066] After the test, the pipe connecting the outlet of the holder 3 to the metering device was removed, the metering device was removed, the lower plug of the holder 3 was rotated 90 degrees, the plug was removed, and the core was unloaded.

[0067] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are 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 therefore cannot be understood as limiting 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 indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0068] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0069] The applicant declares that the above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention fall within the scope of protection and disclosure of the present invention.

Claims

1. A multi-displacement channel automatic switching device, characterized by: It includes a frame mechanism (1), an air source (2), a clamping system, an injection system and a ring pressure system; The frame mechanism (1) comprises a lower bottom box (11) and an upper frame (12) arranged on the top surface of the lower bottom box (11); the upper frame (12) comprises an outer frame and a middle cross frame arranged in the middle of the outer frame; a mask is arranged on the top of the middle cross frame, and the injection system is arranged on the mask; a clamper load-bearing beam (13) is arranged on the front side of the middle cross frame, and the clamping system is fixed on the clamper load-bearing beam (13); The injection system comprises a plurality of injection units, each of which comprises a front-end automatic valve (41), a gas pressure regulating valve (42) and an injection pressure sensor (43); one end of the front-end automatic valve (41) is connected to the gas source bus via a gas source branch line, and the other end is connected to the gas pressure regulating valve (42) via a pipeline; the other end of the gas pressure regulating valve (42) is connected to the inlet of the holder (3) via a pipeline, and the injection pressure sensor (43) is provided on the pipeline between the gas pressure regulating valve (42) and the inlet of the holder (3); The ring pressure system comprises a ring pressure pump (51), a ring pressure bus, a ring pressure relief bus and a plurality of ring pressure valve units, wherein the ring pressure valve unit comprises a ring pressure loading valve (52) and a ring pressure relief valve (53); the outlet of the ring pressure pump (51) is connected to one end of the ring pressure bus, the other end of the ring pressure bus is connected to a plurality of ring pressure branches, the other end of the ring pressure branch is connected to the ring pressure loading valve (52), the other end of the ring pressure loading valve (52) is connected to the ring pressure loading port at the waist of the clamp (3) through a pipeline, the other end of the ring pressure loading valve (52) is connected to the inlet of the clamp (3) through a pipeline, and a ring pressure sensor (54) is provided on the pipeline between the ring pressure loading valve (52) and the inlet of the clamp (3); one end of the ring pressure relief valve (53) is connected to the ring pressure relief port of the clamp (3) through a pipeline, the other end is connected to the ring pressure relief bus through a pipeline, and the other end of the ring pressure relief bus is connected to the water storage tank (6).

2. The multi-displacement channel automatic switching device according to claim 1, characterized in that: The lower bottom box (11) is a hollow cabinet body, with an openable cabinet door provided on the front side and universal wheels provided at the four corners of the bottom; an air source access port for the air source (2) is provided at the lower part of the back side of the lower bottom box (11).

3. The multi-displacement channel automatic switching device according to claim 1, characterized in that: The gas source (2) is a gas cylinder or a centralized gas supply pipeline terminal. The gas source (2) is placed on the right side or behind the periphery of the frame mechanism (1). The gas source (2) is connected to the gas source inlet of the lower bottom box (11) through a gas source bus.

4. The multi-displacement channel automatic switching device according to claim 1, characterized in that: The clamping system comprises a plurality of vertically arranged clamps (3), the clamps (3) being fixed on a clamp bearing beam (13); the upper portion of the clamp (3) being a clamp inlet, the clamp inlet being connected to an injection system; the lower portion of the clamp (3) being a clamp outlet; The holder outlet is connected to a metering device.

5. The multi-displacement channel automatic switching device according to claim 1, characterized in that: The number of the injection units is the same as the number of the clamps (3), and the number of the annular pressure valve units is the same as the number of the clamps (3).

6. The multi-displacement channel automatic switching device according to claim 1, characterized in that: The annular pressure pump (51) is arranged in the lower bottom box (11); the annular pressure loading valve (52) and the annular pressure relief valve (53) are arranged on the middle horizontal frame of the upper frame (12).

7. A method for using the multi-displacement channel automatic switching device according to any one of claims 1 to 6, characterized in that: The following steps are involved: (I) Preparation for ring pressing Each channel holder (3) is sequentially loaded with a core, and the annular pressure relief valve (53) is opened to release the annular pressure of the core holder (3). The released liquid is led to the water storage tank (6) through the annular pressure relief bus to ensure that the air in the outer ring of the rubber sleeve of the core holder (3) is completely discharged. Then, the annular pressure relief valve (53) is closed and the annular pressure loading valve (52) is opened; the values of the injection pressure sensor (43) and the annular pressure sensor (54) are collected, and the annular pressure pump (51) is started according to the annular pressure difference set by the system to control the annular pressure of the channel. After the annular pressure reaches the specified value, the annular pressure loading valve (52) is closed; (II) Start channel test and track ring pressure After the ring pressure of each channel is prepared, the front end automatic valve (41) of each clamp (3) is opened in sequence, and then the gas pressure regulating valve (42) of each clamp (3) is opened in sequence to start the test of each channel; (III) Start data recording After each channel is started, experimental data is collected; (IV) End of the experiment When a channel reaches the end condition, the channel ends the test. When all channels have finished the test, the gas pressure regulating valve (42) of each clamp (3) is closed in sequence, and then the front end automatic valve (41) of each clamp (3) is closed, and the ring pressure relief valve (53) of each clamp (3) is opened, and the entire device ends the operation. (V) Unloading the core After the test is completed, the outlet of the holder (3) is removed and connected to the metering device, and the core is unloaded.

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