A drilling fluid separation device for drilling

Abstract

This utility model relates to the field of solid-liquid separation technology, and in particular to a drilling fluid separation device for drilling. It includes a separation box with a support leg welded to its lower end. Several sets of inclined screens are detachably installed inside the separation box. Outlet grooves are provided on the side wall of the separation box corresponding to the outlet ends of each screen. The device also includes a scraper and a movement control component. The movement control component drives the scraper to reciprocate along the surface of each screen, with the scraper contacting the upper surface of the screen. By providing a scraper that can reciprocate along the screen surface and maintain close contact with the screen, this utility model can remove adhering solid particles in real time, preventing screen blockage and providing a more thorough cleaning effect on sticky substances. This ensures the screen remains unobstructed for a long time, significantly improving separation efficiency. The overall structure balances efficient separation with convenient maintenance, significantly reducing downtime and manual maintenance costs. This device is equipped with an independent scraper cleaning system for each screen layer to ensure consistent cleaning results across all screen layers.

Description

Technical Field

[0001] This utility model relates to the field of solid-liquid separation technology, and in particular to a drilling fluid separation device for drilling. Background Technology

[0002] In oil drilling, geological exploration, and other operations, drilling fluid plays a vital role in cooling the drill bit, carrying cuttings, and stabilizing the wellbore. After use, drilling fluid contains a large number of solid particles, requiring solid-liquid separation for recycling. Currently, commonly used drilling fluid separation devices mainly include vibrating screens and centrifuges, with vibrating screens being widely used due to their simple structure and large processing capacity.

[0003] Traditional vibrating screen separation devices typically include a screen box, screen mesh, and vibration mechanism. They rely on vibration to force drilling fluid through the screen mesh to achieve solid-liquid separation. However, existing technologies have significant shortcomings: First, because drilling fluid contains viscous substances and fine particles, these easily accumulate on the screen mesh surface, leading to screen clogging and severely affecting separation efficiency. Second, conventional vibrating screens rely solely on vibration to clean the screen mesh, which has limited effectiveness in removing highly adhesive solid particles, requiring frequent shutdowns for manual cleaning, increasing maintenance costs and affecting continuous operation. Third, in multi-layer screen structures, the lower screen mesh is more prone to rapid clogging due to material leakage from the upper screen mesh, and the lack of a targeted cleaning mechanism results in a decline in overall separation efficiency.

[0004] Therefore, in view of the existing devices that lack a targeted cleaning mechanism, the viscous substances in the drilling fluid easily cause screen blockage, which seriously affects the separation efficiency and has limited effect on removing highly adhesive solid particles, a drilling fluid separation device for drilling can be designed that can effectively prevent screen blockage, improve separation efficiency and facilitate maintenance. Utility Model Content

[0005] In order to overcome the problem that existing equipment lacks a targeted cleaning mechanism, viscous substances in drilling fluid can easily cause screen clogging, seriously affecting separation efficiency and having limited effect on removing highly adhesive solid particles.

[0006] The technical solution of this utility model is as follows: a drilling fluid separation device for drilling, including a separation box, a support leg welded and fixed at the lower end of the separation box, several sets of inclined screens detachably installed inside the separation box, an outlet groove is opened on the side wall of the separation box corresponding to the outlet end of each screen, and also includes a scraper and a movement control component, the movement control component drives the scraper to move back and forth along the surface of each screen, and the scraper abuts against the upper surface of the screen.

[0007] Preferably, the drilling fluid to be treated enters from the feed inlet of the separator and flows onto the inclined screen. Due to the inclined arrangement of the screen, the drilling fluid flows downward along the screen under the action of gravity. At the same time, solid particles are intercepted by the screen, while the liquid part passes through the screen into the lower layer or is discharged. The motion control component drives the scraper to move back and forth along the surface of the screen. The scraper is in close contact with the upper surface of the screen to scrape off the solid particles adhering to the screen, prevent the screen holes from being blocked, and ensure screening efficiency. The solid particles cleaned by the scraper slide down the screen and are finally discharged from the outlet trough.

[0008] Preferably, the motion control component includes a motor and a rack. The rack is fixedly connected to the outer surface of the separation box, and the rack is inclined at the same angle as the screen. A gear that meshes with the rack is installed on the outer circumferential surface of the motor's output shaft, and a mounting plate is installed on the outside of the motor.

[0009] Preferably, a discharge trough is fixedly connected to the outer surface of the separation box below the outlet trough, and a guide trough that runs through the front and back is opened on the side wall of the separation box along the length direction, with the inclination of the guide trough being consistent with that of the screen.

[0010] Preferably, a limiting support seat for installing a screen is fixedly connected to the inner wall of the separation box, and a sliding rod that penetrates the separation box is inserted into the guide groove. A spring and a scraper are fixedly connected to the lower end of the sliding rod, and the sliding rod is fixedly connected to the mounting plate.

[0011] Preferably, the outer side of the separation box is symmetrically provided with side plates, which are located on the outer surface of the separation box opposite to the motion control component. A guide post is fixedly connected between the two sets of side plates, and a slidable guide slider is sleeved on the outer circumferential surface of the guide post. The guide slider is fixedly connected to the slide rod.

[0012] Preferably, the device also includes a flexible striking mechanism, which includes a rotating shaft rotatably connected to the inner wall of the separation box, a fixed sleeve fixedly connected to the outer circumferential surface of the rotating shaft at equal intervals, two sets of striking rods installed on the outer side of the fixed sleeves, and several sets of flexible striking elements fixedly connected to the outer circumferential surface of the striking rods.

[0013] Preferably, the flexible striking element adopts a spherical structure, and multiple sets of flexible striking elements are provided. The flexible striking elements are arranged sequentially from the inside to the outside along the radial direction of the striking rod, and their size decreases. All flexible striking elements on one side are in contact with the screen.

[0014] The beneficial effects of this utility model are:

[0015] 1. By setting up a scraper that can reciprocate along the screen surface and maintain close contact with the screen, it can scrape off the adhering solid particles in real time, preventing screen clogging. Compared with the traditional cleaning method that only relies on vibration, this mechanical scraping structure has a more thorough cleaning effect on sticky substances, ensuring that the screen remains unobstructed for a long time and greatly improving separation efficiency. The screen adopts a detachable installation method, with a limit support seat, which facilitates quick replacement or cleaning. The optimized design of the outlet chute and discharge chute makes the discharge of solid particles smoother and reduces accumulation. The overall structure takes into account both high-efficiency separation and convenient maintenance, significantly reducing downtime and manual maintenance costs. For multi-layer screen structures, this device is equipped with an independent scraper cleaning system for each layer of screen to ensure that the cleaning effect of each layer of screen is consistent, avoiding the problem of the lower layer screen being quickly blocked due to material leakage from the upper layer in traditional devices, making the overall separation effect more stable and reliable.

[0016] 2. A flexible striking mechanism is added, which drives the flexible striking component to periodically strike the screen through the rotating shaft, generating auxiliary vibration, which works in conjunction with mechanical scraping. The multi-stage spherical structure design of the flexible striking component can adapt to screens in different positions, further enhancing the anti-clogging effect, and is particularly suitable for treating drilling fluids containing viscous substances. Attached Figure Description

[0017] Figure 1 The diagram shown is a three-dimensional structural schematic of Embodiment 1 of the drilling fluid separation device for drilling according to this utility model;

[0018] Figure 2 The diagram shown is a three-dimensional cross-sectional view of Embodiment 1 of the drilling fluid separation device for drilling according to this utility model.

[0019] Figure 3 The diagram shown is a three-dimensional structural schematic of the moving control component and screen in the drilling fluid separation device for drilling according to this utility model.

[0020] Figure 4 The diagram shown is a three-dimensional structural schematic of the scraper and slide bar in the drilling fluid separation device for drilling according to this utility model;

[0021] Figure 5 The diagram shown is a cross-sectional three-dimensional structural schematic of Embodiment 2 of the drilling fluid separation device for drilling according to this utility model.

[0022] Explanation of reference numerals in the attached drawings: 1. Separation box; 2. Support leg; 3. Screen; 4. Outlet trough; 51. Motor; 52. Rack; 53. Gear; 54. Mounting plate; 6. Scraper; 7. Discharge chute; 8. Guide channel; 9. Limiting support seat; 10. Slide rod; 11. Spring; 12. Side plate; 13. Guide column; 14. Guide slider; 151. Rotating shaft; 152. Fixing sleeve; 153. Striking rod; 154. Flexible striking component. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Example 1

[0025] Please see Figures 1-4 This utility model provides an embodiment: a drilling fluid separation device for drilling, including a separation box 1, with a support leg 2 welded and fixed to the lower end of the separation box 1. Several sets of inclined screens 3 are detachably installed inside the separation box 1. An outlet groove 4 is respectively opened on the side wall of the separation box 1 corresponding to the outlet end of each screen 3. It also includes a scraper 6 and a movement control component. The movement control component drives the scraper 6 to reciprocate along the surface of each screen 3, with the scraper 6 abutting against the upper surface of the screen 3. The movement control component includes a motor 51 and a rack 52. The rack 52 is fixedly connected to the outer surface of the separation box 1, and the inclination of the rack 52 is consistent with that of the screen 3. A gear 53 meshing with the rack 52 is installed on the outer circumference of the output shaft of the motor 51. An mounting plate 54 is installed on the outside of the motor 51. The outlet groove 4 is located below... The separation box 1 is provided with a discharge chute 7 fixedly connected to the outer surface of the separation box 1. A guide groove 8 is provided on the side wall of the separation box 1 along the length direction, and the guide groove 8 is inclined at the same angle as the screen 3. A limiting support seat 9 for installing the screen 3 is fixedly connected to the inner wall of the separation box 1. A slide rod 10 is inserted into the guide groove 8 and passes through the separation box 1. A spring 11 and a scraper 6 are fixedly connected to the lower end of the slide rod 10. The slide rod 10 is fixedly connected to the mounting plate 54. Side plates 12 are symmetrically provided on the outer side of the separation box 1. The side plates 12 are provided on the outer surface of the separation box 1 opposite to the movement control component. A guide post 13 is fixedly connected between the two sets of side plates 12. A slidable guide slider 14 is sleeved on the outer circumferential surface of the guide post 13. The guide slider 14 is fixedly connected to the slide rod 10.

[0026] During operation, the drilling fluid to be processed enters through the feed inlet of the separator 1 and flows onto the inclined screen 3. Because the screen 3 is inclined, the drilling fluid flows downwards along the screen 3 under gravity. Simultaneously, solid particles are intercepted by the screen 3, while the liquid portion passes through the screen 3 to the lower layer or is discharged. The output shaft of the motor 51 drives the gear 53 to rotate. Since the gear 53 meshes with the rack 52 fixed to the outer surface of the separator 1, the motor 51 moves along the rack 52, thereby driving the scraper 6 to slide along the surface of the screen 3. The slide rod 10 is fixed to the mounting plate 54, and the slide rod 10 guides the flow... The trough 8 slides, and the outer side of the separation box 1 is provided with a side plate 12. A guide column 13 is installed between the side plates 12. The guide slider 14 slides along the guide column 13 to ensure that the slide rod 10 moves smoothly. The spring 11 connects to the scraper 6, so that the scraper 6 is always in close contact with the surface of the screen 3. The scraper 6 is in close contact with the upper surface of the screen 3 to scrape off the solid particles adhering to the screen 3, prevent the screen holes from being blocked, and ensure screening efficiency. The solid particles cleaned by the scraper 6 slide down the screen 3 and are finally discharged from the outlet trough 4 and fall into the discharge trough 7 for centralized collection. The liquid part passes through the screen 3 and enters the next stage of processing, and is finally discharged.

[0027] Example 2

[0028] Please see Figures 3-5 This utility model provides an embodiment: a drilling fluid separation device for drilling, which differs from embodiment 1 in that it also includes a flexible striking mechanism. The flexible striking mechanism includes a rotating shaft 151 rotatably connected to the inner wall of the separation box 1. The outer circumferential surface of the rotating shaft 151 is fixedly connected to a fixed sleeve 152 distributed at equal intervals. Two sets of striking rods 153 are installed on the outer side of the fixed sleeves 152. Several sets of flexible striking elements 154 are fixedly connected to the outer circumferential surface of the striking rods 153. The flexible striking elements 154 adopt a spherical structure. Multiple sets of flexible striking elements 154 are provided, and the flexible striking elements 154 are arranged in sequence from the inside to the outside along the radial direction of the striking rods 153 and their size decreases. All flexible striking elements 154 on one side abut against the screen 3.

[0029] During operation, under the action of water flow, the flexible striking element 154 rotates along the rotating shaft 151, and the fixed sleeve 152 and the striking rod 153 rotate synchronously. The flexible striking element 154 intermittently strikes the bottom of the screen 3, generating vibration, which further prevents the screen holes from clogging. The flexible striking element 154 adopts a multi-stage spherical structure with decreasing size from the inside to the outside, ensuring that the screen 3 at different positions can be effectively vibrated.

[0030] Through the above steps, by setting a scraper 6 that can reciprocate along the surface of the screen 3 and maintain close contact with the screen 3, adhering solid particles can be scraped off in real time, preventing screen clogging. Compared with the traditional cleaning method that relies solely on vibration, this mechanical scraping structure has a more thorough cleaning effect on sticky substances, ensuring that the screen 3 remains unobstructed for a long time and greatly improving separation efficiency. The screen 3 adopts a detachable installation method, with a limiting support 9, which facilitates quick replacement or cleaning. The optimized design of the outlet trough 4 and the discharge trough 7 makes the discharge of solid particles smoother, reduces accumulation, and improves the overall structure. This device balances efficient separation with ease of maintenance, significantly reducing downtime and labor costs. For the multi-layer screen 3 structure, each layer of screen 3 is equipped with an independent scraper 6 cleaning system to ensure consistent cleaning effect across all layers. This avoids the problem of rapid clogging of the lower screen 3 due to material leakage from the upper layer, which is common in traditional devices, making the overall separation effect more stable and reliable. This addresses the problem that existing devices lack targeted cleaning mechanisms, making it easy for viscous substances in drilling fluid to clog the screen holes, severely affecting separation efficiency, and having limited effectiveness in removing highly adhesive solid particles.

[0031] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A drilling fluid separation device for drilling, comprising a separation tank (1), a support leg (2) welded and fixed to the lower end of the separation tank (1), and several sets of inclined screens (3) detachably installed inside the separation tank (1), and outlet grooves (4) respectively opened on the side wall of the separation tank (1) corresponding to the outlet ends of each screen (3), characterized in that: It also includes a scraper (6) and a motion control component, the motion control component drives the scraper (6) to move back and forth along the surface of each screen (3), and the scraper (6) abuts against the upper surface of the screen (3).

2. The drilling fluid separation device for drilling according to claim 1, characterized in that: The motion control assembly includes a motor (51) and a rack (52). The rack (52) is fixedly connected to the outer surface of the separation box (1), and the rack (52) is inclined at the same angle as the screen (3). A gear (53) that meshes with the rack (52) is installed on the outer circumferential surface of the output shaft of the motor (51). An mounting plate (54) is installed on the outside of the motor (51).

3. The drilling fluid separation device for drilling according to claim 2, characterized in that: Below the outlet trough (4), there is a discharge trough (7) fixedly connected to the outer surface of the separation box (1). The side wall of the separation box (1) along the length direction is provided with a guide trough (8) that runs through the front and back. The inclination of the guide trough (8) is consistent with that of the screen (3).

4. The drilling fluid separation device for drilling according to claim 3, characterized in that: The inner wall of the separation box (1) is fixedly connected to a limiting support seat (9) for installing the screen (3). A sliding rod (10) that passes through the separation box (1) is inserted into the guide groove (8). A spring (11) and a scraper (6) are fixedly connected to the lower end of the sliding rod (10). The sliding rod (10) is fixedly connected to the mounting plate (54).

5. A drilling fluid separation device for drilling according to claim 4, characterized in that: The separation box (1) is symmetrically provided with side plates (12) on the outside. The side plates (12) are located on the outer surface of the separation box (1) opposite to the movement control component. A guide post (13) is fixedly connected between the two sets of side plates (12). A slidable guide slider (14) is sleeved on the outer peripheral surface of the guide post (13). The guide slider (14) is fixedly connected to the slide rod (10).

6. The drilling fluid separation device for drilling according to claim 1, characterized in that: It also includes a flexible striking mechanism, which includes a rotating shaft (151) rotatably connected to the inner wall of the separation box (1), and fixed sleeves (152) evenly distributed on the outer circumferential surface of the rotating shaft (151). Two sets of striking rods (153) are installed on the outer side of the fixed sleeves (152), and several sets of flexible striking parts (154) are fixedly connected on the outer circumferential surface of the striking rods (153).

7. A drilling fluid separation device for drilling according to claim 6, characterized in that: The flexible striking element (154) adopts a spherical structure. Multiple sets of flexible striking elements (154) are provided. The flexible striking elements (154) are arranged in sequence from the inside to the outside along the radial direction of the striking rod (153) and the size decreases. The flexible striking elements (154) on one side all abut against the screen (3).

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