Negative-pressure vibration screening device for drilling fluid based on low-carbon petroleum exploitation and use method of negative-pressure vibration screening device

Abstract

The invention provides a negative-pressure vibration screening device for drilling fluid based on low-carbon petroleum exploitation and a using method, and relates to the technical field of drilling fluid treatment.The device comprises a box body with a degassing cavity with the circular section in the middle, and a material storage cavity and a screening cavity are formed in the two sides of the box body correspondingly; an exhaust hole is formed in the top of the degassing cavity, and a stirring mechanism is arranged in the degassing cavity; a first vacuum generator is mounted on the exhaust hole; a first sliding plate capable of sliding is arranged between the material storage cavity and the degassing cavity; a screen is arranged at the bottom of the screening cavity, and a second sliding plate capable of sliding is arranged between the screening cavity and the degassing cavity; and the screen is arranged on the negative pressure collecting disc. The degassing cavity and the screening cavity are formed in the box body, so that waste gas separation and residue separation can be effectively carried out on the drilling fluid; a first vacuum generator mounted on the exhaust hole is matched, so that the separation efficiency and the separation effect of the waste gas can be effectively improved; a negative pressure collecting disc is installed below the screen in the screening cavity, the pressure difference between the upper portion and the lower portion of the screen can be effectively utilized, and the solid-liquid separation efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of drilling fluid treatment, and in particular to a drilling fluid negative pressure vibration screening device based on low-carbon petroleum extraction and a method of use. Background Art

[0002] The drilling fluid produced during the extraction of energy such as oil contains a large amount of solid harmful substances and harmful gases; direct discharge will not only pollute the atmosphere, but also pollute surface and groundwater resources. At the same time, heavy metals retained in the soil will also affect the growth of plants and the reproduction of microorganisms, and even endanger the health of humans and animals due to plant absorption and enrichment. Therefore, the drilling fluid needs to be treated before discharge to meet environmental protection requirements.

[0003] In the prior art, such as the application publication number CN 116607898 A, a polar drilling fluid solid-liquid separation device and method, includes: a containing space is set on the vibration separation device; a heating element is set in the containing space; a heat transfer zone connected to the containing space is set on the vibration separation device; liquid is injected into the heat transfer zone and the containing space; a slidable piston is set in the containing space; the piston can move with the vibration of the vibration separation device under the action of its own inertia, and when the piston moves, it can push and / or extract liquid. The present invention uses the vibration of the vibration separation device itself during operation, so that the piston continuously extracts or pushes the liquid under the action of inertia, heats the liquid through the heating element, and the heat transfer zone conducts the heat of the liquid to the vibration separation device, which can increase the temperature of the vibration separation device. It only has the solid-liquid separation function. If you want to separate the gas, you need to separate it through other equipment, which is not only cumbersome to operate, but also leads to low efficiency. Summary of the invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a drilling fluid negative pressure vibration screening device based on low-carbon petroleum extraction and a method of use.

[0005] In a first aspect, the present application provides a drilling fluid negative pressure vibration screening device based on low-carbon petroleum mining, comprising: A box body, wherein a degassing cavity with a circular cross section is provided in the middle of the box body, and a storage cavity and a screening cavity are respectively provided on both sides of the degassing cavity; The degassing chamber has an exhaust hole at the top and a stirring mechanism inside to accelerate exhaust. A first vacuum generator is installed on the exhaust hole to discharge and collect the exhaust gas; A slidable first slide plate is provided between the material storage chamber and the degassing chamber, and the sliding direction is parallel to the vertical direction, and is used to control the connection and disconnection between the degassing chamber and the material storage chamber; A screen is provided at the bottom of the screening chamber, and a second slide plate which can slide relatively with the degassing chamber is provided between the screening chamber and the degassing chamber, so as to control the opening and closing between the degassing chamber and the screening chamber; The screen is installed on the negative pressure collection plate to increase the solid-liquid separation speed; A linkage mechanism, the linkage mechanism comprising a first piston slidably mounted in the material storage chamber and a second piston slidably mounted in the degassing chamber; A first supporting spring and a first trigger switch are provided at the bottom of the material storage chamber corresponding to the first piston, and are used to control the first slide plate to slide open; A second supporting spring and a second trigger switch are provided at the bottom of the degassing chamber corresponding to the second piston, and are used to control the first slide plate to slide and close.

[0006] Furthermore, A matching first sliding groove is provided on the outer wall of the degassing cavity corresponding to the first sliding plate; The bottom of the first slide groove is relatively lower than the top surface of the first piston; The first sliding plate is embedded in the first sliding groove and can slide relative to the first sliding groove.

[0007] Furthermore, A first threaded hole is provided inside the first slide plate, and a first screw rod is installed through the first threaded hole; The first screw rod is threadedly connected to the first slide plate, the extension direction is parallel to the vertical direction, and the end portion extends to the outside of the box body; A matching first driving motor is disposed on the top of the box body corresponding to the first screw rod.

[0008] Furthermore, A matching second sliding groove is provided on the outer wall of the degassing cavity corresponding to the second sliding plate; The bottom of the second slide groove is relatively lower than the top surface of the second piston; The second sliding plate is embedded in the second sliding groove and can slide relatively to the second sliding groove.

[0009] Furthermore, A second threaded hole is provided inside the second slide plate, and a second screw rod is installed through the second threaded hole; The second screw rod is threadedly connected to the second slide plate, the extension direction is parallel to the vertical direction, and the end portion extends to the outside of the box body; A matching second driving motor is provided on the top of the box body corresponding to the second screw rod.

[0010] Furthermore, The stirring mechanism comprises a stirring shaft coaxial with the degassing chamber and a blade mounted on the stirring shaft; The stirring shaft is rotatably mounted on the box body, with one end extending into the degassing chamber and the other end extending to the outside of the box body; The blades are located in the degassing chamber, and are in plurality and arranged in an array on the stirring shaft.

[0011] Furthermore, The bottom of the negative pressure collection tray is funnel-shaped, and a material guide pipe is installed at the output end; The material guide pipe is arranged obliquely, and a second vacuum generator is installed at one end away from the negative pressure collection plate, and a liquid discharge port is arranged in the middle for separating gas and liquid.

[0012] Furthermore, The side of the screen away from the degassing chamber is hingedly mounted on the negative pressure collection plate; A vibration generator is provided on one side of the negative pressure collection plate close to the degassing chamber and corresponding to the screen; A matching discharge port is provided on one side of the box body corresponding to the screen.

[0013] Furthermore, The screening chamber is also provided with a slide table which can be raised and lowered relatively; The cross section of the slide table matches the cross section of the screening chamber, is located above the screen, and has a top surface relatively lower than the second slide groove; The slide table is in a trumpet shape, and an electric valve is provided at the bottom for controlling the flow rate of drilling fluid.

[0014] In a second aspect, the present application provides a method for using a drilling fluid negative pressure vibration screening device based on low-carbon petroleum mining, comprising the following steps: S100, initialization, driving the first slide plate and the second slide plate to a low position respectively by the first drive motor and the second drive motor; S200, loading, continuously inputting drilling fluid into the storage chamber; S210, the first trigger switch is triggered, the first drive motor is started in the forward direction, and the first slide plate is driven to a high position; the drilling fluid in the storage chamber enters the degassing chamber; S220, the second trigger switch is triggered, the first drive motor is started in reverse, and the first slide plate is driven to a low position; S300, starting the first vacuum generator to discharge the exhaust gas from the degassing chamber through negative pressure; S310, starting the third driving motor to accelerate the separation of the exhaust gas by stirring; S320, turning off the third driving motor and the first vacuum generator to complete degassing; S400, starting the second driving motor in a forward direction to drive the second slide plate to a high position, so that the drilling fluid in the degassing chamber is discharged into the screening chamber; S410, starting the second driving motor in reverse direction to drive the second sliding plate to a low position; S500, repeat the operations S210-S410; S600, positively starting the cylinder to drive the slide to rise to a high position; S610, starting a vibration generator to increase the speed of the screen for solid-liquid separation; S620, starting the second vacuum generator to further increase the speed of the screen for solid-liquid separation; S630, opening the electric valve to directionally discharge drilling fluid to the screen; S640, starting the electric push rod in a positive direction to drive the screen to flip, and discharge the screened solid separated matter to the outside of the box through the discharge port; S650, reversely starting the electric push rod to drive the screen to reset; S660, repeating S630-S650; S700, reversely start the cylinder to drive the slide to a lower position; S710, turning off the vibration generator; S720, turning off the second vacuum generator.

[0015] The advantages and positive effects of this application are: The technical solution can effectively separate the waste gas and residue from the drilling fluid by respectively arranging a degassing chamber and a screening chamber inside the box body; wherein, the storage chamber and the degassing chamber are separated by a first slide plate, and the automatic loading between the storage chamber and the degassing chamber can be automatically completed in coordination with the linkage between the first piston and the second piston; the interior of the degassing chamber is provided with a stirring mechanism, and in coordination with the first vacuum generator installed on the exhaust hole, the separation efficiency and separation effect of the waste gas can be effectively improved; in the screening chamber, a negative pressure collection plate is installed below the screen, and the pressure difference between the upper and lower parts of the screen can be effectively utilized to improve the efficiency of solid-liquid separation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of a drilling fluid negative pressure vibration screening device based on low-carbon petroleum extraction provided in an embodiment of the present application; Figure 2 A schematic diagram of a top view of a drilling fluid negative pressure vibration screening device based on low-carbon petroleum extraction provided in an embodiment of the present application; Figure 3 A schematic diagram of the structure of the screen of the drilling fluid negative pressure vibration screening device based on low-carbon petroleum extraction provided in an embodiment of the present application.

[0017] The text labels in the figure are as follows: 100-box; 110-discharge port; 200-degassing chamber; 201-exhaust hole; 210-first vacuum generator; 220-second piston; 230-second support spring; 240-second trigger switch; 250-stirring shaft; 251-blade; 252-third drive motor; 300-storage chamber; 310-first slide plate; 320-first piston; 330-first support spring; 340-first trigger switch; 350-first screw rod; 351-first drive motor; 400-screening chamber; 410-screen; 420-second slide plate; 430-negative pressure collection plate; 431-material guide pipe; 432-discharge port; 440-second screw rod; 441-second drive motor; 450-second vacuum generator; 460-slide; 461-electric valve; 470-cylinder; 480-electric push rod. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the technical solution of the present application, the present application is described in detail below in conjunction with the accompanying drawings. The description in this section is only exemplary and explanatory and should not have any limiting effect on the scope of protection of the present application.

[0019] First, please refer to Figure 1-3 This embodiment provides a drilling fluid negative pressure vibration screening device based on low-carbon petroleum mining, including A box body 100, wherein a degassing cavity 200 with a circular cross section is provided in the middle of the box body 100, and a storage cavity 300 and a screening cavity 400 are respectively provided on both sides of the degassing cavity 200; The degassing chamber 200 has an exhaust hole 201 at the top and a stirring mechanism inside to accelerate exhaust. The exhaust hole 201 is provided with a first vacuum generator 210 for discharging and collecting the exhaust gas; A slidable first slide plate 310 is provided between the storage chamber 300 and the degassing chamber 200, and the sliding direction is parallel to the vertical direction, and is used to control the connection and disconnection between the degassing chamber 200 and the storage chamber 300; A screen 410 is provided at the bottom of the screening chamber 400, and a second slide plate 420 that can slide relatively to the degassing chamber 200 is provided to control the connection and disconnection between the degassing chamber 200 and the screening chamber 400; The screen 410 is installed on the negative pressure collection plate 430 to increase the solid-liquid separation speed; A linkage mechanism, the linkage mechanism comprising a first piston 320 slidably mounted in the material storage chamber 300 and a second piston 220 slidably mounted in the degassing chamber 200; A first support spring 330 and a first trigger switch 340 are provided at the bottom of the material storage chamber 300 corresponding to the first piston 320, and are used to control the first slide plate 310 to slide open; A second supporting spring 230 and a second trigger switch 240 are provided at the bottom of the degassing chamber 200 corresponding to the second piston 220 , and are used to control the first slide plate 310 to slide and close.

[0020] In this embodiment, the cross-section of the box body 100 is rectangular, and a degassing chamber 200 with a circular cross-section is provided in the middle, and the diameter matches the width of the box body 100; therefore, the two sides of the degassing chamber 200 also form the storage chamber 300 and the screening chamber 400 between the box body 100 respectively.

[0021] In this embodiment, the stirring mechanism is provided inside the degassing chamber 200 , and the stirring of the stirring mechanism can effectively improve the separation efficiency of harmful gases, so that the harmful gases are discharged and collected through the exhaust hole 201 at the top of the degassing chamber 200 for treatment.

[0022] It should be noted that the connection and disconnection between the degassing chamber 200 and the storage chamber 300 refers to whether the drilling fluid in the storage chamber 300 can be input into the degassing chamber 200, and is not strictly speaking the connection and disconnection of the entire space. The connection and disconnection between the degassing chamber 200 and the screening chamber 400 refers to whether the drilling fluid in the degassing chamber 200 can be input into the screening chamber 400, and is not strictly speaking the connection and disconnection of the entire space.

[0023] It should be noted that the dimensions of the first slide groove and the second slide groove on the side wall of the degassing chamber 200 for installing the first slide plate 310 and the second slide plate 420 in the vertical direction are slightly larger than the dimensions of the first slide plate 310 and the second slide plate 420 in the vertical direction, that is, when the first vacuum generator 210 is working, the upper part of the degassing chamber 200 is connected to the upper part of the storage chamber 300 and the upper part of the screening chamber 400.

[0024] In this embodiment, the output end of the exhaust hole 201 is connected to the first vacuum generator 210, thereby forming a negative pressure, so that the harmful gas in the degassing chamber 200 can be better discharged.

[0025] In this embodiment, the negative pressure collection plate 430 is fixedly installed at the bottom of the screening chamber 400; the screen 410 is installed on the negative pressure collection plate 430 and fully covers the negative pressure collection plate 430, thereby forming a pressure difference between the upper and lower ends of the screen 410, which can effectively accelerate the solid-liquid separation efficiency of the drilling fluid.

[0026] In this embodiment, the cross section of the first piston 320 matches the cross section of the storage chamber 300 , and can not only be lifted and slid inside the storage chamber 300 , but also can block the drilling fluid so that the drilling fluid is always above the first piston 320 .

[0027] In this embodiment, the first support spring 330 and the first trigger switch 340 are both located below the first piston 320; wherein, the first support spring 330 is used to support and drive the first piston 320 to reset. When drilling fluid is continuously injected above the first piston 320, the first piston 320 will continuously compress the first spring 330, thereby triggering the first trigger switch 340, and then driving the first slide plate 310 to rise, so that the storage chamber 300 and the degassing chamber 200 are linked, so that the drilling fluid can flow into the degassing chamber 200.

[0028] In this embodiment, the cross section of the second piston 220 matches the cross section of the degassing chamber 200 , and can not only rise and fall and slide inside the degassing chamber 200 , but also block the drilling fluid so that the drilling fluid is always above the second piston 220 .

[0029] In this embodiment, the second support spring 230 and the second trigger switch 240 are both located below the second piston 220; wherein, the second support spring 230 is used to support and drive the second piston 220 to reset. When the drilling fluid flows from the storage chamber 300 into the degassing chamber 200, the second piston 220 will continue to compress the second support spring 230, thereby triggering the second trigger switch 240, and then driving the first slide plate 310 to descend, so that the drilling fluid cannot continue to flow into the degassing chamber 200.

[0030] In this embodiment, as the drilling fluid in the storage chamber 300 flows into the degassing chamber 200, its mass will decrease, so that the first piston 320 rises under the drive of the first support spring 330 and then disengages from the first trigger switch 340; thereby ensuring that the second piston 220 will not conflict with the first trigger switch 340 when the second trigger switch 240 is triggered.

[0031] In this embodiment, a distance measuring sensor is further provided in the degassing chamber 200 below the second piston 220 for detecting the distance from the second piston 220; when the detected distance is less than the no-load distance of the second piston 220, the first trigger switch 340 cannot be triggered; thereby ensuring that when the degassing chamber 200 is working or has not been discharged, the storage chamber 300 supplies the degassing chamber 200.

[0032] In a preferred embodiment, a matching first slide groove is provided on the outer wall of the degassing chamber 200 corresponding to the first slide plate 310; the bottom of the first slide groove is relatively lower than the top surface of the first piston 320; the first slide plate 310 is embedded in the first slide groove and can slide relative to the first slide groove.

[0033] In this embodiment, the first slide groove extends in the vertical direction, and the bottom is relatively lower than the top surface of the first piston 320 when it is in a low position, and relatively higher than the bottom surface of the first piston 320 when it is in a high position, so as to form a seal between the first slide plate 310 and the first piston 320, and ensure that the space of the storage chamber 300 located below the first piston 320 will not be connected to the degassing chamber 200, thereby preventing drilling fluid from entering the space of the storage chamber 300 located below the first piston 320.

[0034] In this embodiment, the thickness and curvature of the first slide plate 310 are the same as the side wall between the degassing chamber 200 and the material storage chamber 300 , thereby ensuring the sealing between the first slide plate 310 and the first piston 320 .

[0035] In this embodiment, limiting protrusions are respectively provided on both sides of the first slide plate 310; the limiting protrusions extend along the sliding direction of the first slide plate 310, and the width is relatively smaller than the thickness of the first slide plate 310; at the same time, matching limiting grooves are also provided on both sides of the first slide groove corresponding to the limiting protrusions.

[0036] In this embodiment, when the first slide plate 310 is in a low position, a gap is left between the bottom and the bottom of the first slide groove, and the height is relatively lower than the height of the top surface when the first piston 320 is in a low position; therefore, it can ensure that a seal is formed between the first piston 320, and the stock in the first slide groove will not be accumulated, thereby avoiding the risk of poor sealing due to limited stroke caused by accumulation of stock.

[0037] In a preferred embodiment, a first threaded hole is provided inside the first slide plate 310, and a first screw rod 350 is installed through the first threaded hole; the first screw rod 350 is threadedly connected to the first slide plate 310, and the extension direction is parallel to the vertical direction, and the end portion extends to the outside of the box body 100; the top of the box body 100 is provided with a matching first drive motor 351 corresponding to the first screw rod 350.

[0038] In this embodiment, the first threaded hole is located in the middle of the first slide plate 310, and the extension direction is parallel to the vertical direction; on the side wall between the degassing chamber 200 and the storage chamber 300, a coaxial through hole is provided above the first threaded hole for installing the first screw rod 350; one end of the first screw rod 350 is threadedly connected to the first slide plate 310, and the other end extends to the outside of the box body 100.

[0039] In this embodiment, the first screw rod 350 is connected to the housing 100 via a bearing, thereby ensuring that the first screw rod 350 can rotate relatively and limiting the displacement of the first screw rod 350 relative to the housing 100; the bearing is embedded in the housing 100, the inner ring is fixedly connected to the first screw rod 350, and the outer ring is fixedly connected to the housing 100.

[0040] In this embodiment, the first screw rod 350 is driven by the first driving motor 351 ; the first driving motor 351 is fixedly installed on the top of the box 100 , and an output end is connected to the first screw rod 350 through a reducer.

[0041] In a preferred embodiment, a matching second slide groove is provided on the outer wall of the degassing chamber 200 corresponding to the second slide plate 420; the bottom of the second slide groove is relatively lower than the top surface of the second piston 220; the second slide plate 420 is embedded in the second slide groove and can slide relative to the second slide groove.

[0042] In this embodiment, the second slide groove extends in the vertical direction, and the bottom is relatively lower than the top surface of the second piston 220 when it is in a low position, and relatively higher than the bottom surface of the second piston 220 when it is in a high position, thereby forming a seal between the second slide plate 420 and the second piston 220, and ensuring that the space of the degassing chamber 200 located below the second piston 220 will not be connected to the screening chamber 400, thereby preventing drilling fluid from entering the space of the degassing chamber 200 located below the second piston 220.

[0043] In this embodiment, the thickness and curvature of the second slide plate 420 are the same as the side wall between the degassing chamber 200 and the screening chamber 400 , thereby ensuring the sealing between the second slide plate 420 and the second piston 220 .

[0044] In this embodiment, limiting protrusions are respectively provided on both sides of the second slide plate 420; the limiting protrusions extend along the sliding direction of the second slide plate 420, and the width is relatively smaller than the thickness of the second slide plate 420; at the same time, matching limiting grooves are also provided on both sides of the second slide groove corresponding to the limiting protrusions.

[0045] In this embodiment, when the second slide plate 420 is in a low position, a gap is left between the bottom and the bottom of the second slide groove, and the height is relatively lower than the height of the top surface when the second piston 220 is in a low position; therefore, it can ensure that a seal is formed between the second piston 220, and the stock in the second slide groove will not be accumulated, thereby avoiding the risk of poor sealing due to limited stroke caused by accumulation of stock.

[0046] In a preferred embodiment, a second threaded hole is provided inside the second slide plate 420, and a second screw rod 440 is installed through the second threaded hole; the second screw rod 440 is threadedly connected to the second slide plate 420, and the extension direction is parallel to the vertical direction, and the end portion extends to the outside of the box body 100; the top of the box body 100 is provided with a matching second drive motor 441 corresponding to the second screw rod 440.

[0047] In this embodiment, the second threaded hole is located in the middle of the second slide plate 420, and the extension direction is parallel to the vertical direction; on the side wall between the degassing chamber 200 and the screening chamber 400, a coaxial through hole is provided above the second threaded hole for installing the second screw rod 440; one end of the second screw rod 440 is threadedly connected to the second slide plate 420, and the other end extends to the outside of the box body 100.

[0048] In this embodiment, the second screw rod 440 is connected to the housing 100 via a bearing, thereby ensuring that the second screw rod 440 can rotate relatively and limiting the displacement of the second screw rod 440 relative to the housing 100; the bearing is embedded in the housing 100, the inner ring is fixedly connected to the second screw rod 440, and the outer ring is fixedly connected to the housing 100.

[0049] In this embodiment, the second screw rod 440 is driven by the second drive motor 441 ; the second drive motor 441 is fixedly installed on the top of the box body 100 , and the output end is connected to the second screw rod 440 through a reducer.

[0050] In a preferred embodiment, the stirring mechanism includes a stirring shaft 250 coaxial with the degassing chamber 200 and a blade 251 installed on the stirring shaft 250; the stirring shaft 250 can be rotatably installed on the housing 100, with one end extending into the degassing chamber 200 and the other end extending to the outside of the housing 100; the blades 251 are located in the degassing chamber 200, and the number includes multiple blades 251, which are arranged in an array on the stirring shaft 250.

[0051] In this embodiment, the stirring shaft 250 is rotatably mounted on the housing 100 and is coaxial with the degassing chamber 200 , with one end extending to the inside of the degassing chamber 200 and the other end extending to the outside of the housing 100 .

[0052] In this embodiment, the stirring shaft 250 is driven by a third driving motor 252; the third driving motor 252 is fixedly installed on the top of the box 100, and the output end is connected to the stirring shaft 250 through a reducer.

[0053] In a preferred embodiment, the bottom of the negative pressure collection tray 430 is funnel-shaped, and a material guide tube 431 is installed at the output end; the material guide tube 431 is arranged at an angle, and a second vacuum generator 450 is installed at the end away from the negative pressure collection tray 430, and a liquid discharge port 432 is provided in the middle for separating gas and liquid.

[0054] In this embodiment, the negative pressure collection plate 430 is funnel-shaped, so that the liquid screened on the screen 410 can be discharged through the guide pipe 431; the guide pipe 431 is inclined to the side close to the degassing chamber 200.

[0055] In this embodiment, a liquid discharge port 432 is provided in the middle of the guide tube 431 and near the bottom, and the second vacuum generator 450 is installed at the end away from the negative pressure collection tray 430; the second vacuum generator 450 generates negative pressure in the negative pressure collection tray 430 through the guide tube 431, thereby accelerating the solid-liquid separation speed; when the liquid is discharged from the guide tube 431, it will enter the liquid discharge port 432 due to its own gravity, thereby preventing it from entering the second vacuum generator 450.

[0056] In this embodiment, a one-way valve is further provided on the liquid discharge port 432 , thereby ensuring that the separated liquid can pass normally and preventing gas from flowing back and affecting the negative pressure effect of the negative pressure collection plate 430 .

[0057] In a preferred embodiment, the side of the screen 410 away from the degassing chamber 200 is hingedly mounted on the negative pressure collection plate 430; a vibration generator is provided on the side of the negative pressure collection plate 430 close to the degassing chamber 200 corresponding to the screen 410; and a matching discharge port 110 is provided on one side of the box body 100 corresponding to the screen 410.

[0058] In this embodiment, the screen 410 is hingedly mounted on the negative pressure collection plate 430 at one side away from the degassing chamber 200; at the same time, a matching discharge port 110 is provided on the side wall of the box body 100 corresponding to the screen 410; when the screen 410 completes screening, the solid separation can be discharged to the outside of the box body 100 through the discharge port 110 by flipping it.

[0059] In this embodiment, the vibration generator is also provided at one end of the negative pressure collection plate 430 away from the discharge port 110; the vibration generator is located between the negative pressure collection plate 430 and the screen 410, and is used to drive the screen 410 to vibrate, thereby effectively improving the solid-liquid separation efficiency of the screen 410.

[0060] In this embodiment, outer edges are respectively provided on both sides of the negative pressure collection plate 430; an electric push rod 480 is fixedly installed at the bottom of the outer edge; the piston rod of the electric push rod 480 passes through the outer edge and abuts against the screen 410, so as to drive the screen 410 to flip.

[0061] In a preferred embodiment, a slide 460 that can be relatively raised and lowered is further provided in the screening chamber 400; the cross-section of the slide 460 matches the cross-section of the screening chamber 400, and is located above the screen 410, with the top surface relatively lower than the second slide groove; the slide 460 is in a trumpet shape, and an electric valve 461 is provided at the bottom for controlling the amount of drilling fluid passing through.

[0062] In this embodiment, the slide 460 can be raised and lowered and slidably installed in the screening chamber 400, and its cross-section matches that of the screening chamber 400; when the drilling fluid in the degassing chamber 200 is discharged into the screening chamber 400, it will be isolated above the slide 460; when the drilling fluid is discharged, the second slide 420 first closes the channel, and the slide 460 rises for storage, and finally the drilling fluid is discharged in batches onto the screen 410 through the electric valve 461; multiple small-scale screening methods can effectively improve the screening effect.

[0063] In this embodiment, the slide 460 is driven to rise and fall by a cylinder 470 ; there are two cylinders 470 , which are respectively installed on the two side walls of the box 100 adjacent to the degassing chamber 200 , and the output end is connected to the slide 460 .

[0064] In a second aspect, this embodiment provides a method for using a drilling fluid negative pressure vibration screening device based on low-carbon petroleum mining, comprising the following steps: S100, initialization, driving the first slide plate 310 and the second slide plate 420 to a low position respectively by the first drive motor 351 and the second drive motor 441; S200, loading, continuously inputting drilling fluid into the storage chamber 300; S210, the first trigger switch 340 is triggered, the first drive motor 351 is started in the forward direction, and the first slide plate 310 is driven to a high position; the drilling fluid in the storage chamber 300 enters the degassing chamber 200; S220, the second trigger switch 240 is triggered, the first drive motor 351 is started in reverse, and the first slide plate 310 is driven to a low position; S300, starting the first vacuum generator 210 to discharge the waste gas from the degassing chamber 200 through negative pressure; S310, starting the third driving motor 252 to accelerate the separation of the exhaust gas by stirring; S320, turning off the third driving motor 252 and the first vacuum generator 210 to complete degassing; S400, starting the second driving motor 441 in a forward direction, driving the second slide plate 420 to a high position, so that the drilling fluid in the degassing chamber 200 is discharged into the screening chamber 400; S410, reversely start the second driving motor 441 to drive the second slide plate 420 to a low position; S500, repeat the operations S210-S410; S600, positively starting the cylinder 470 to drive the slide 460 to rise to a high position; S610, starting a vibration generator to increase the speed of the screen 410 for solid-liquid separation; S620, starting the second vacuum generator 450 to further increase the solid-liquid separation speed of the screen 410; S630, opening the electric valve 461 to directionally discharge the drilling fluid to the screen 410; S640, starting the electric push rod 480 in a positive direction to drive the screen 410 to flip, and discharge the screened solid separated matter to the outside of the box 100 through the discharge port 110; S650, reversely start the electric push rod 480 to drive the screen 410 to reset; S660, repeating S630-S650; S700, reversely start the cylinder 470 to drive the slide 460 to a lower position; S710, turning off the vibration generator; S720 , turning off the second vacuum generator 450 .

[0065] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and its core ideas of this application. The above is only the preferred implementation method of this application. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the present invention, they can also make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the scope of protection of this application.

Claims

1. A drilling fluid negative pressure vibration screening device based on low-carbon petroleum mining, characterized in that: include: A box body (100), wherein a degassing cavity (200) having a circular cross section is provided in the middle of the box body (100), and a material storage cavity (300) and a screening cavity (400) are respectively provided on both sides of the degassing cavity (200); The degassing chamber (200) is provided with an exhaust hole (201) at the top and a stirring mechanism inside to accelerate exhaust; The exhaust hole (201) is provided with a first vacuum generator (210) for discharging and collecting exhaust gas; A slidable first slide plate (310) is provided between the material storage chamber (300) and the degassing chamber (200), wherein the sliding direction is parallel to the vertical direction and is used to control the connection and disconnection between the degassing chamber (200) and the material storage chamber (300); A screen (410) is provided at the bottom of the screening chamber (400), and a second slide plate (420) that can slide relatively to the degassing chamber (200) is provided between the screening chamber (400) and the degassing chamber (200) for controlling the connection and disconnection between the degassing chamber (200) and the screening chamber (400); The screen (410) is installed on the negative pressure collection plate (430) to increase the solid-liquid separation speed; A linkage mechanism, the linkage mechanism comprising a first piston (320) slidably mounted in the material storage chamber (300) and a second piston (220) slidably mounted in the degassing chamber (200); A first supporting spring (330) and a first trigger switch (340) are provided at the bottom of the material storage chamber (300) corresponding to the first piston (320), and are used to control the first slide plate (310) to slide open; A second supporting spring (230) and a second trigger switch (240) are provided at the bottom of the degassing chamber (200) corresponding to the second piston (220), and are used to control the first slide plate (310) to slide and close.

2. The drilling fluid negative pressure vibration screening device based on low-carbon petroleum mining according to claim 1 is characterized in that: A matching first sliding groove is provided on the outer wall of the degassing cavity (200) corresponding to the first sliding plate (310); The bottom of the first slide groove is relatively lower than the top surface of the first piston (320); The first sliding plate (310) is embedded in the first sliding groove and can slide relative to the first sliding groove.

3. The drilling fluid negative pressure vibration screening device based on low-carbon petroleum mining according to claim 2 is characterized in that: A first threaded hole is provided inside the first slide plate (310), and a first screw rod (350) is installed through the first threaded hole; The first screw rod (350) is threadedly connected to the first slide plate (310), the extension direction is parallel to the vertical direction, and the end portion extends to the outside of the box body (100); A matching first driving motor (351) is provided at the top of the box body (100) corresponding to the first screw rod (350).

4. The drilling fluid negative pressure vibration screening device based on low-carbon petroleum mining according to claim 3 is characterized in that: A matching second sliding groove is provided on the outer wall of the degassing cavity (200) corresponding to the second sliding plate (420); The bottom of the second slide groove is relatively lower than the top surface of the second piston (220); The second sliding plate (420) is embedded in the second sliding groove and can slide relative to the second sliding groove.

5. The drilling fluid negative pressure vibration screening device based on low-carbon petroleum mining according to claim 4 is characterized in that: A second threaded hole is provided inside the second slide plate (420), and a second screw rod (440) is installed through the second threaded hole; The second screw rod (440) is threadedly connected to the second slide plate (420), the extension direction is parallel to the vertical direction, and the end portion extends to the outside of the box body (100); A matching second drive motor (441) is provided at the top of the box body (100) corresponding to the second screw rod (440).

6. The drilling fluid negative pressure vibration screening device based on low-carbon petroleum mining according to claim 5 is characterized in that: The stirring mechanism comprises a stirring shaft (250) coaxial with the degassing chamber (200) and a blade (251) mounted on the stirring shaft (250); The stirring shaft (250) is rotatably mounted on the box body (100), with one end extending into the degassing chamber (200) and the other end extending to the outside of the box body (100); The blades (251) are located in the degassing chamber (200), are in plurality, and are arranged in an array on the stirring shaft (250).

7. The drilling fluid negative pressure vibration screening device based on low-carbon petroleum mining according to claim 6 is characterized in that: The bottom of the negative pressure collection plate (430) is funnel-shaped, and a material guide tube (431) is installed at the output end; The material guide pipe (431) is arranged obliquely, and a second vacuum generator (450) is installed at one end away from the negative pressure collection plate (430), and a liquid discharge port (432) is provided in the middle for separating gas and liquid.

8. The drilling fluid negative pressure vibration screening device based on low-carbon petroleum mining according to claim 7 is characterized in that: The side of the screen (410) away from the degassing chamber (200) is hingedly mounted on the negative pressure collection plate (430); A vibration generator is provided on a side of the negative pressure collection plate (430) close to the degassing chamber (200) corresponding to the screen (410); A matching discharge port (110) is provided on one side of the box body (100) corresponding to the screen (410).

9. The drilling fluid negative pressure vibration screening device based on low-carbon petroleum mining according to claim 8 is characterized in that: The screening chamber (400) is further provided with a slide table (460) that can be raised and lowered relatively; The cross section of the slide (460) matches the cross section of the screening chamber (400), is located above the screen (410), and has a top surface relatively lower than the second slide groove; The slide table (460) is in a bell-mouth shape, and an electric valve (461) is provided at the bottom thereof for controlling the flow rate of drilling fluid.

10. A method for using the drilling fluid negative pressure vibration screening device based on low-carbon petroleum mining as claimed in claim 9, comprising the following steps: S100, initialization, driving the first slide plate (310) and the second slide plate (420) to a low position respectively by means of the first drive motor (351) and the second drive motor (441); S200, loading, continuously inputting drilling fluid into the storage chamber (300); S210, the first trigger switch (340) is triggered, the first drive motor (351) is started in the forward direction, and the first slide plate (310) is driven to a high position; the drilling fluid in the storage chamber (300) enters the degassing chamber (200); S220, the second trigger switch (240) is triggered, the first drive motor (351) is started in reverse, and the first slide plate (310) is driven to a low position; S300, starting the first vacuum generator (210) to discharge waste gas from the degassing chamber (200) through negative pressure; S310, starting the third driving motor (252) to accelerate the separation of the exhaust gas by stirring; S320, turning off the third drive motor (252) and the first vacuum generator (210) to complete degassing; S400, starting the second driving motor (441) in a forward direction, driving the second slide plate (420) to a high position, so that the drilling fluid in the degassing chamber (200) is discharged into the screening chamber (400); S410, starting the second driving motor (441) in reverse direction to drive the second sliding plate (420) to a low position; S500, repeat the operations S210-S410; S600, positively starting the cylinder (470) to drive the slide (460) to rise to a high position; S610, starting a vibration generator to increase the speed of the screen (410) for solid-liquid separation; S620, starting the second vacuum generator (450) to further increase the speed of the screen (410) for solid-liquid separation; S630, opening the electric valve (461) to directionally discharge drilling fluid to the screen (410); S640, starting the electric push rod (480) in a forward direction to drive the screen (410) to flip, and discharge the screened solid separated matter to the outside of the box (100) through the discharge port (110); S650, starting the electric push rod (480) in reverse direction to drive the screen (410) to reset; S660, repeating S630-S650; S700, reversely starting the cylinder (470) to drive the slide table (460) to a lower position; S710, turning off the vibration generator; S720, turning off the second vacuum generator (450).

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