A drilling fluid screening and recycling device based on large-diameter straight well

Abstract

This invention discloses a drilling fluid screening and recovery device based on a large-diameter vertical well, relating to the field of drilling fluid screening technology. It includes a screening body with a feed hopper fixedly connected to the top. A collection mechanism is installed on the screening body, located at the bottom of the feed hopper. The collection mechanism includes at least two mounting plates fixedly connected to the screening body. Multiple blocking columns are rotatably connected to the mounting plates, each located at the bottom of the feed hopper and inclined. This invention, through the collection mechanism, utilizes the vibration of the screening body. With the cooperation of the blocking columns and the tumbling assembly, it not only increases the material screening time but also allows the drilling fluid in the material pores to detach from the material through multi-angle tumbling, preventing it from being carried out by large, porous particles, reducing waste, overcoming the shortcomings of existing technologies, and improving economic efficiency.

Description

Technical Field

[0001] This invention relates to the field of drilling fluid screening technology, specifically to a drilling fluid screening and recovery device based on a large-diameter vertical well. Background Technology

[0002] In coal mine construction, large-diameter vertical wells refer to relatively large-diameter vertical wells drilled vertically (or near vertically) for a specific purpose. When using circulating drilling techniques such as drilling methods, a large amount of drilling fluid is used, resulting in a drilling fluid mixture containing a large amount of rock cuttings. In order to economically and environmentally recover and recycle these drilling fluids, they must be purified. Among them, the screening device is the first key link in the purification system, used to separate and remove rock cuttings from the drilling fluid.

[0003] When using the screening device, the drilling fluid mixture containing rock cuttings is fed into the feed inlet of the screening device and falls onto the inclined screen plate of the device under the guidance of the feed inlet. Then, the high-frequency vibration of the screen plate causes the drilling fluid mixture containing rock cuttings to be classified into particles on the screen with a specific aperture, so as to remove rock cuttings impurities larger than the screen aperture and complete the screening process of the drilling fluid.

[0004] While the aforementioned screening device can effectively screen drilling fluid mixtures, in actual use, when the drilled rock formations contain porous rock layers (such as loose or uncemented sandstone or conglomerate cuttings), the drilled cuttings also exhibit porous characteristics. Consequently, when larger, porous cuttings are mixed with the drilling fluid mixture for screening, their larger particle size increases the depth of the pores. These deeper pores absorb more drilling fluid, preventing the device from effectively removing the drilling fluid from the pores within the limited screening time. This results in a significant amount of drilling fluid being screened out with the cuttings, leading to waste. Summary of the Invention

[0005] In view of this, the present invention proposes a drilling fluid screening and recovery device based on a large-diameter vertical well to solve the problems in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a drilling fluid screening and recovery device based on a large-diameter vertical well, comprising a screening machine body, a feed hopper fixedly connected to the top of the screening machine body, and a collection mechanism provided on the screening machine body, the collection mechanism being located at the bottom of the feed hopper;

[0007] The collection mechanism includes at least two mounting plates, which are fixedly connected to the screening machine body. Multiple blocking columns are rotatably connected to the mounting plates. Each blocking column is located at the bottom of the feed hopper and is inclined. The collection mechanism includes a tumbling assembly. The blocking columns are used to block large particles and increase their screening time. The tumbling assembly drives the blocking columns to rotate back and forth through the vibration generated by the screening machine body, so that the blocked material is tumbling.

[0008] Preferably, the tumbling assembly includes multiple protrusions fixedly connected to the outer surface of the blocking column. The higher end of the inclined surface of the blocking column penetrates the mounting plate, and a swinging component is fixedly connected to one end of the mounting plate. When the screening machine vibrates, the swinging component drives the blocking column to rotate.

[0009] Preferably, a support plate is fixedly connected to the mounting plate near the swing member. Multiple limiting blocks are fixedly connected to the upper surface of the support plate. The number of limiting blocks is the same as that of the swing member. The limiting blocks are used to limit the swing member so that the swing member remains in a non-vertical state.

[0010] Preferably, the end of the limiting block that contacts the swinging member is made of flexible rubber.

[0011] Preferably, each of the protrusions is arc-shaped on the side closest to the oscillating member.

[0012] Preferably, the collecting mechanism further includes an auxiliary component, which includes a lead screw rotatably connected to a mounting plate. A support rod is fixedly connected to the mounting plate, and a sliding rod is slidably connected to the top of the support rod. The sliding rod is threadedly connected to the lead screw, and several push rods are rotatably connected to the sliding rod. A first torsion spring is fixedly connected between the push rod shaft and the sliding rod, and several L-shaped rods are fixedly connected to the sliding rod. Each L-shaped rod contacts one side of an adjacent push rod to limit the sliding range of the push rod. The top of the push rod is higher than the height of the blocking column, and the push rod is located in the gap between the blocking columns. When the lead screw rotates, the push rod is driven to deflect the material blocking the blocking column through the cooperation of the support rod and the sliding rod.

[0013] Preferably, a drive source is fixedly connected to the side of the mounting plate near the support plate, and the output end of the drive source is fixedly connected to the lead screw.

[0014] Preferably, the push rod is configured with an inclined surface on the side near the L-shaped rod.

[0015] Preferably, the drive source is a servo motor.

[0016] Preferably, a baffle is rotatably connected to the top of the mounting plate near the lower end of the inclined surface of the blocking column to prevent the material from sliding, and a second torsion spring is fixedly connected between the first torsion spring shaft and the mounting plate.

[0017] Compared with the prior art, the present invention provides a drilling fluid screening and recovery device based on a large-diameter vertical well, which has the following beneficial effects:

[0018] 1. This invention, through the setting of the collection mechanism, utilizes the vibration of the screening machine body. With the cooperation of the blocking column and the tumbling assembly, it not only increases the material screening time, but also allows the drilling fluid in the material pores to be separated from the material through the multi-angle tumbling of the material, preventing it from being carried out by the porous large particles, reducing waste, overcoming the shortcomings of the prior art, and improving economic efficiency.

[0019] 2. By setting auxiliary components, the present invention can push the material blocked by the blocking column for an appropriate time to the outside of the blocking column. During the pushing process, it not only prevents the material from getting stuck in the gap between the blocking columns, but also prevents the material from accumulating too much on the blocking column and blocking the feeding hopper. This ensures the screening effect of the collection mechanism on larger materials with gaps and the stability of the feeding hopper. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a three-dimensional structural diagram of the collecting mechanism of the present invention;

[0022] Figure 3 This is a three-dimensional view of the side structure of the collecting mechanism of the present invention;

[0023] Figure 4 This is a three-dimensional structural diagram of the lead screw of the present invention;

[0024] Figure 5 For the present invention Figure 4 Enlarged structural diagram at point A in the middle;

[0025] Figure 6 This is a three-dimensional structural diagram of the baffle of the present invention.

[0026] In the picture:

[0027] 100. Screening machine body; 101. Feed hopper;

[0028] 200. Collection mechanism; 201. Mounting plate; 202. Blocking post; 203. Protrusion; 204. Swinging component; 205. Support plate; 206. Limiting block;

[0029] 211. Lead screw; 212. Support rod; 213. Sliding rod; 214. Drive source; 215. Push rod; 216. First torsion spring; 217. L-shaped rod; 218. Baffle; 219. Second torsion spring. Detailed Implementation

[0030] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, some features described in the examples may be combined in other examples.

[0031] Example 1

[0032] like Figures 1 to 6 As shown, this embodiment provides a drilling fluid screening and recovery device based on a large-diameter vertical well, including a screening machine body 100, a feed hopper 101 fixedly connected to the top of the screening machine body 100, a vibrating screen plate on the screening machine body 100, and a collection mechanism 200 provided on the screening machine body 100. The collection mechanism 200 is installed on the vibrating screen plate and is located at the bottom of the feed hopper 101.

[0033] The collecting mechanism 200 includes at least two mounting plates 201, which are fixedly connected to the vibrating screen plate on the screening machine body 100. Multiple blocking columns 202 are rotatably connected to the mounting plates 201. Each blocking column 202 is located at the bottom of the feed hopper 101 and is inclined. The collecting mechanism 200 includes a tumbling assembly. The blocking columns 202 are used to block large particles and increase their screening time. The tumbling assembly drives the blocking columns 202 to reciprocate through the vibration generated by the screening machine body 100, so that the blocked material is tumbling.

[0034] The tumbling assembly includes multiple protrusions 203 fixedly connected to the outer surface of the blocking column 202. The higher end of the inclined surface of the blocking column 202 passes through the mounting plate 201. A swinging member 204 is fixedly connected to one end of the mounting plate 201. When the screening machine body 100 vibrates, the swinging member 204 drives the blocking column 202 to rotate.

[0035] A support plate 205 is fixedly connected to the mounting plate 201 near the swing member 204. Multiple limiting blocks 206 are fixedly connected to the upper surface of the support plate 205. The number of limiting blocks 206 is the same as that of the swing member 204. The limiting blocks 206 are used to limit the swing member 204 so that the swing member 204 remains in a non-vertical state.

[0036] Furthermore, the end of the limiting block 206 that contacts the swinging member 204 is made of flexible rubber material, so that when the swinging member 204 swings up and down and contacts the limiting block 206, the impact and noise between the end of the swinging member 204 and the top of the limiting block 206 can be reduced, thus reducing wear.

[0037] Furthermore, each protrusion 203 is designed to be arc-shaped on the side near the oscillating member 204, so that when the material rolls toward the lower end of the blocking post 202, the arc-shaped surface can reduce the resistance during rolling.

[0038] Example 2

[0039] like Figures 1 to 6 As shown, this embodiment provides a drilling fluid screening and recovery device based on a large-diameter vertical well, including a screening machine body 100, a feed hopper 101 fixedly connected to the top of the screening machine body 100, and a collection mechanism 200 provided on the screening machine body 100, with the collection mechanism 200 located at the bottom of the feed hopper 101.

[0040] The collecting mechanism 200 includes at least two mounting plates 201, which are fixedly connected to the vibrating screen plate on the screening machine body 100. Multiple blocking columns 202 are rotatably connected to the mounting plates 201. Each blocking column 202 is located at the bottom of the feed hopper 101 and is inclined. The collecting mechanism 200 includes a tumbling assembly. The blocking columns 202 are used to block large particles and increase their screening time. The tumbling assembly drives the blocking columns 202 to reciprocate through the vibration generated by the screening machine body 100, so that the blocked material is tumbling.

[0041] The tumbling assembly includes multiple protrusions 203 fixedly connected to the outer surface of the blocking column 202. The higher end of the inclined surface of the blocking column 202 passes through the mounting plate 201. A swinging member 204 is fixedly connected to one end of the mounting plate 201. When the screening machine body 100 vibrates, the swinging member 204 drives the blocking column 202 to rotate.

[0042] A support plate 205 is fixedly connected to the mounting plate 201 near the swing member 204. Multiple limiting blocks 206 are fixedly connected to the upper surface of the support plate 205. The number of limiting blocks 206 is the same as that of the swing member 204. The limiting blocks 206 are used to limit the swing member 204, so that the swing member 204 remains in a non-vertical state.

[0043] The collecting mechanism 200 also includes auxiliary components, including a lead screw 211 rotatably connected to a mounting plate 201. A support rod 212 is also fixedly connected to the mounting plate 201. A sliding rod 213 is slidably connected to the top of the support rod 212. The sliding rod 213 is threadedly connected to the lead screw 211. Several push rods 215 are rotatably connected to the sliding rod 213. A first torsion spring 216 is fixedly connected between the pivot of the push rod 215 and the sliding rod 213. Several L-shaped rods 217 are fixedly connected to the sliding rod 213. Each L-shaped rod 217 contacts one side of the adjacent push rod 215 to limit the sliding range of the push rod 215. The top height of the push rod 215 is higher than the height of the blocking post 202. The push rod 215 is located in the gap between the blocking posts 202. When the lead screw 211 rotates, the push rod 215 is driven to block the material from the blocking post 202 through the cooperation of the support rod 212 and the sliding rod 213.

[0044] A drive source 214 is fixedly connected to the side of the mounting plate 201 near the support plate 205. The output end of the drive source 214 is fixedly connected to the lead screw 211. The drive source 214 is set as a servo motor.

[0045] Furthermore, the push rod 215 is configured with an inclined surface on the side near the L-shaped rod 217. During resetting, the inclined surface can reduce the stress between the material and the push rod 215.

[0046] Furthermore, a baffle 218 is rotatably connected to the top of the mounting plate 201 near the lower end of the inclined surface of the blocking column 202 to block the sliding of the material. A second torsion spring 219 is fixedly connected between the shaft of the first torsion spring 216 and the mounting plate 201. The rotation of the baffle 218 is triggered by the pushing force on the material when the push rod 215 slides, thereby completing the material discharge work.

[0047] The working principle of all the content in the above embodiments is as follows:

[0048] Before operation: The mounting plate 201 is installed on the vibrating screen plate of the feed hopper 101. When the vibrating screen plate vibrates up and down, it will drive the mounting plate 201 to vibrate up and down simultaneously. The blocking column 202 is set at an angle, such as... Figure 2 As shown, its right side is higher than its left side, which causes the material to gradually slide to the right end when it falls from the feed hopper 101. The space between the blocking columns 202 is appropriate, so that materials of normal size can pass through the space between the blocking columns 202.

[0049] The following explains the working principle and beneficial effects of the collection mechanism 200:

[0050] When the drilling fluid to be filtered contains porous rock cuttings, the collection mechanism 200 is installed on the screen plate and at the bottom of the feed hopper 101. When the material falls from the feed hopper 101 onto the screen plate of the screening machine body 100, if the material contains large particles that cannot pass through the space between the blocking columns 202, they will be blocked by the blocking columns 202. Then, under the vibration of the screening machine body 100, the screen plate and the blocking columns 202 will vibrate simultaneously. Since the material always stays on the blocking columns 202, the larger particles containing pores can be fully screened. At the same time, during the vibration, the material moves towards the blocking column 202 with the inclined surface, preventing it from accumulating in the middle and affecting the feeding operation of the feed hopper 101.

[0051] Furthermore, when the mounting plate 201 vibrates along with the screening machine body 100, the swing member 204, limited by the limiting block 206, will swing up and down under the force of vertical vibration, thereby driving the blocking column 202 to rotate reciprocally. Consequently, when larger particles are blocked by the blocking column 202, they are affected by the vibration of the screening machine body 100 and the cooperation of the tumbling assembly. (Refer to...) Figure 2 As shown, the material rolls to the left, and simultaneously, driven by the tumbling assembly, the blocking column 202 slides back and forth, causing the protrusion 203 to roll to the left. The reciprocating rotation of the blocking column 202 drives the protrusion 203 to rotate, allowing the protrusion 203 to be propelled by the rolling material. This causes the material to roll left and right, and also back and forth under the protrusion 203's propelling action, increasing the rolling angle. When there are deep pores in the material, the blocking column 202 and the tumbling assembly work together to allow drilling fluid in the pores to detach from the material through multi-angle tumbling, preventing it from being carried out by large, porous particles, reducing waste, overcoming the shortcomings of existing technologies, and improving economic efficiency.

[0052] Furthermore, by setting the protrusions 203 on the side near the swing member 204 to be arc-shaped, the material is prevented from being blocked by the protrusions 203 during the rolling process by the guidance of the arc-shaped surface, thus ensuring the smoothness of the rolling.

[0053] Furthermore, by setting the support plate 205 and the limiting block 206, the limiting block 206 limits the swinging component 204, preventing the swinging component 204 from being vertical due to gravity, and ensuring that the vibration of the screening machine body 100 does not affect the swinging component 204. At the same time, by setting the top of the limiting block 206 with flexible rubber material, when the swinging component 204 swings up and down and comes into contact with the limiting block 206, the impact and noise between one end of the swinging component 204 and the top of the limiting block 206 can be reduced, thus reducing wear and improving service life.

[0054] Furthermore, after the material accumulates on the blocking column 202 for a certain period of time, in order to prevent excessive material blockage of the feed hopper 101, the drive source 214 is activated, causing the drive source 214 to drive the lead screw 211 to rotate, which in turn causes the sliding rod 213 to slide under the guidance of the support rod 212, which in turn causes the sliding rod 213 to drive the push rod 215 to slide, causing the support plate 205 to move towards the lower end of the blocking column 202. Since the top height of the support plate 205 exceeds that of the blocking column 202, when the support plate 205 slides in the space of the blocking column 202, it can generate a pushing force on the material in the space of the blocking column 202. In turn, the support plate 205 can push the material to move towards the baffle 218. The pushing force applied to the material also causes the material to exert a pushing force on the baffle 218, which in turn pushes the baffle 218 to rotate. The second torsion spring 219 twists, thereby canceling the obstruction of the material, and under the push of the push rod 215, the material slides off the baffle 218.

[0055] It should be noted that, under the push of the push rod 215, the material moves from the blocking column 202 to the baffle 218. At this time, under the pressure of the material, the baffle 218 is in a relatively tilted state, and the material rolls off the tilted baffle 218 and moves to the designated position. When the push rod 215 pushes the material, it cannot rotate under the action of the L-shaped rod 217.

[0056] After the material is pushed down from the baffle 218, there is no material compression or downward pressure. Under the rotation of the second torsion spring 219, the baffle 218 resets. At the same time, the drive source 214 drives the lead screw 211 to rotate in the opposite direction, causing the sliding rod 213 to reset. During the reset process, if any material is blocked by the blocking post 202, when the push rod 215 comes into contact with the material near the L-shaped rod 217, it will push the push rod 215 to rotate. The first torsion spring 216 will twist, and will not push the material. After the material is deflected, the first torsion spring 216 will rebound and drive the push rod 215 to reset, thereby preventing the push rod 215 from pushing the material in the opposite direction and causing the problem of material discharge failure.

[0057] Furthermore, by setting auxiliary components, materials blocked by the blocking column 202 for an appropriate period of time can be pushed to the outside of the blocking column 202. During the pushing process, not only is it prevented that material jamming occurs in the gaps between the blocking columns 202, but it is also prevented that too much material accumulates on the blocking column 202 and blocks the feeding hopper 101 from discharging. This ensures the screening effect of the collecting mechanism 200 on larger materials with gaps and the stability of the feeding hopper 101.

[0058] The embodiments of the present invention have been described above, but the embodiments are not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the embodiments described above, all of which are within the protection scope of the embodiments described above.

Claims

1. A drilling fluid screening and recovery device based on a large-diameter vertical well, comprising a screening body (100), wherein a feed hopper (101) is fixedly connected to the top of the screening body (100), characterized in that, The screening machine body (100) is provided with a collection mechanism (200), which is located at the bottom of the feed hopper (101); The collecting mechanism (200) includes at least two mounting plates (201), which are fixedly connected to the screening machine body (100). Multiple blocking columns (202) are rotatably connected to the mounting plates (201). Each blocking column (202) is located at the bottom of the feed hopper (101) and is inclined. The collecting mechanism (200) includes a tumbling assembly. The blocking columns (202) are used to block large particles and increase their screening time. The tumbling assembly drives the blocking columns (202) to rotate back and forth through the vibration generated by the screening machine body (100), so that the blocked material is tumbling.

2. The drilling fluid screening and recovery device based on a large-diameter vertical well according to claim 1, characterized in that: The tumbling assembly includes multiple protrusions (203) fixedly connected to the outer surface of the blocking column (202). The higher end of the inclined surface of the blocking column (202) passes through the mounting plate (201). A swinging component (204) is fixedly connected to one end of the mounting plate (201). When the screening machine body (100) vibrates, the swinging component (204) drives the blocking column (202) to rotate.

3. The drilling fluid screening and recovery device based on a large-diameter vertical well according to claim 2, characterized in that: The mounting plate (201) is fixedly connected to a support plate (205) on the side near the swing member (204). Multiple limiting blocks (206) are fixedly connected to the upper surface of the support plate (205). The number of limiting blocks (206) is the same as that of the swing member (204). The limiting blocks (206) are used to limit the swing member (204) so ​​that the swing member (204) remains in a non-vertical state.

4. The drilling fluid screening and recovery device based on a large-diameter vertical well according to claim 3, characterized in that: The end of the limiting block (206) that contacts the swinging member (204) is made of flexible rubber.

5. A drilling fluid screening and recovery device based on a large-diameter vertical well according to claim 2, characterized in that: Each of the protrusions (203) is arc-shaped on the side near the oscillating member (204).

6. The drilling fluid screening and recovery device based on a large-diameter vertical well according to claim 1, characterized in that: The collecting mechanism (200) further includes an auxiliary component, which includes a lead screw (211) rotatably connected to a mounting plate (201). A support rod (212) is also fixedly connected to the mounting plate (201). A sliding rod (213) is slidably connected to the top of the support rod (212). The sliding rod (213) is threadedly connected to the lead screw (211). Several push rods (215) are rotatably connected to the sliding rod (213). A first torsion spring is fixedly connected between the rotating shaft of the push rod (215) and the sliding rod (213). (216) Several L-shaped rods (217) are fixedly connected to the sliding rod (213). Each L-shaped rod (217) is in contact with one side of the adjacent push rod (215) to limit the sliding range of the push rod (215). The top height of the push rod (215) is higher than the height of the blocking column (202). The push rod (215) is located in the gap between the blocking columns (202). When the screw (211) rotates, the push rod (215) is driven to move the material blocking column (202) through the cooperation of the support rod (212) and the sliding rod (213).

7. A drilling fluid screening and recovery device based on a large-diameter vertical well according to claim 6, characterized in that: A drive source (214) is fixedly connected to the side of the mounting plate (201) near the support plate (205), and the output end of the drive source (214) is fixedly connected to the lead screw (211).

8. A drilling fluid screening and recovery device based on a large-diameter vertical well according to claim 7, characterized in that: The push rod (215) is set with an inclined surface on the side near the L-shaped rod (217).

9. A drilling fluid screening and recovery device based on a large-diameter vertical well according to claim 7, characterized in that: The drive source (214) is set as a servo motor.

10. A drilling fluid screening and recovery device based on a large-diameter vertical well according to claim 9, characterized in that: A baffle (218) is rotatably connected to the top of the mounting plate (201) near the lower end of the inclined surface of the blocking post (202) to block the sliding of the material. A second torsion spring (219) is fixedly connected between the shaft of the first torsion spring (216) and the mounting plate (201).

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