A water-based rock debris screening device

Abstract

The utility model relates to water base rock treatment device field especially relates to a water base rock dust screening device. Water base rock dust screening device includes the chassis, both sides fixed mounting of the chassis top have the support ring, and the same screening cylinder that carries out the screening to water base rock dust is rotatably installed between both sides support rings, the outer wall of screening cylinder is opened and is equipped with the mounting groove, and the inside fixed mounting of mounting groove has a plurality of annular distribution's support cross bar, and the spiral strip that carries out the conveying to water base rock dust is fixedly installed in screening cylinder. Water base rock dust screening device provided by the utility model adopts the arc screen net modular assembly structure, when the screen net partial breakage wears, only needs to dismantle corresponding damaged arc screen net, does not need to replace screening cylinder integrally to disassemble, and further can simplify the repair procedure, shortens the length of time of shutdown maintenance.

Description

Technical Field

[0001] This utility model relates to the field of water-based rock treatment devices, and in particular to a water-based rock debris screening device. Background Technology

[0002] In drilling operations, water-based drilling fluid carries water-based rock cuttings generated at the bottom of the well back to the surface. To achieve drilling fluid recycling and subsequent processing of the rock cuttings, the returned rock cuttings mixture needs to undergo solid-liquid screening. This separates and discharges large rock cuttings solids from the drilling fluid while simultaneously recovering recyclable water-based drilling fluid. Existing water-based rock cuttings screening devices mainly include two types: vibrating screens and drum screens. Vibrating screens rely on an excitation motor to drive the screen box to vibrate, allowing the liquid phase to pass through and be recovered, while the solid phase is discharged along the screen surface. Drum screens, on the other hand, use the rotation of the drum to tumble the material, allowing the liquid phase and fine particles to pass through the screen mesh, while large rock cuttings move along the drum towards the discharge end and are discharged. Drum screens feature thorough material tumbling, a large screening area, and stable operation.

[0003] However, most existing drum screens adopt an integrated welded structure, with the screen fixed to the drum frame. When the screen is worn or damaged in a certain area, the damaged part cannot be replaced independently. The entire drum screen needs to be disassembled, which is cumbersome to maintain and has high spare parts costs. Moreover, the overall disassembly and maintenance method results in long downtime maintenance time, which can easily affect subsequent screening operations.

[0004] Therefore, it is necessary to provide a new water-based rock debris screening device to solve the above-mentioned technical problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a water-based rock debris screening device.

[0006] The water-based rock debris screening device provided by this utility model includes a base frame, on both sides of the top of the base frame fixedly installed, and a screening cylinder for screening water-based rock debris is rotatably installed between the two support rings. The outer wall of the screening cylinder is provided with an installation groove, and multiple ring-shaped support crossbars are fixedly installed inside the installation groove. A spiral strip for conveying water-based rock cuttings is also fixedly installed inside the screening cylinder. Symmetrically distributed protruding rods are fixedly installed on both sides of the outer wall of the support crossbar, and the same arc-shaped screen is sleeved on the protruding rod on the adjacent side between two adjacent support crossbars.

[0007] Preferably, a collection frame for collecting mud is fixedly installed on the base frame, the collection frame is located below the screening cylinder, and a discharge hopper for discharging mud is fixedly installed at the bottom of the collection frame.

[0008] Preferably, the outer side of the arc-shaped screen is provided with a mounting frame that connects with the protruding rod, and the mounting frame has connecting holes at the four corners for the protruding rod to pass through. Nuts are screwed onto the protruding rod to fix the arc-shaped screen.

[0009] Preferably, drive components for driving the screening cylinder are fixedly installed on both sides inside the base frame.

[0010] Preferably, a retaining ring is provided on the outer side of the support ring, the retaining ring is fixedly sleeved on the screening cylinder, and the side wall of the retaining ring abuts against the side wall of the support ring.

[0011] Compared with related technologies, the water-based rock cuttings screening device provided by this utility model has the following beneficial effects: 1. This utility model adopts a modular assembly structure of arc-shaped screen. When the screen is partially damaged or worn, only the corresponding damaged arc-shaped screen needs to be disassembled, without the need to disassemble and replace the entire screening cylinder. This simplifies the maintenance process and shortens the downtime for maintenance. 2. The specifications of each arc-shaped screen of this utility model are uniform. When preparing maintenance materials and spare parts, users only need to prepare one specification, which can reduce the types of spare parts and the amount of reserves, thereby reducing the later use cost of the equipment. Attached Figure Description

[0012] Figure 1 A schematic diagram of the structure of the water-based rock debris screening device provided by this utility model; Figure 2 for Figure 1 The diagram shows the structure of the base frame and screening cylinder. Figure 3 for Figure 1 The diagram shows the structure of the arc-shaped screen. Figure 4 for Figure 1 A partial cross-sectional structural diagram of the liquid collection frame is shown.

[0013] The following are labeled in the diagram: 1. Base frame; 11. Support ring; 12. Retaining ring; 2. Screening cylinder; 21. Mounting groove; 22. Support crossbar; 221. Protruding rod; 3. Arc-shaped screen; 4. Liquid collection frame; 41. Liquid discharge hopper; 5. Spiral strip. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0015] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0016] Please see Figures 1 to 4 This utility model provides a water-based rock debris screening device, which includes a base frame 1. Support rings 11 are fixedly installed on both sides of the top of the base frame 1. A screening cylinder 2 for screening water-based rock debris is rotatably installed between the two support rings 11. A retaining ring 12 is provided on the outer side of the support ring 11. The retaining ring 12 is fixedly sleeved on the screening cylinder 2, and the side wall of the retaining ring 12 abuts against the side wall of the support ring 11. Thus, during use, the retaining ring 12 can prevent the screening cylinder 2 from axially moving by abutting against the support ring 11, thereby allowing the screening cylinder 2 to rotate stably.

[0017] In the embodiments of this utility model, please refer to Figures 1 to 4 The outer wall of the screening cylinder 2 is provided with an installation groove 21. Multiple ring-shaped support crossbars 22 are fixedly installed inside the installation groove 21, and a spiral strip 5 for conveying water-based rock cuttings is fixedly installed inside the screening cylinder 2. Symmetrically distributed protruding rods 221 are fixedly installed on both sides of the outer wall of the support crossbars 22. The same arc-shaped screen 3 is sleeved on the protruding rods 221 on the adjacent side between two adjacent support crossbars 22.

[0018] When the external water-based drilling fluid carrying water-based rock cuttings enters the screen cylinder 2 from the feed hopper outside the screen cylinder 2, the rotating screen cylinder 2 will drive the internal spiral 5 to rotate synchronously, thereby pushing the material along the axial direction of the screen cylinder 2 towards the discharge end. During the tumbling process, the drilling fluid phase and fine solid particles pass through the arc screen 3 and fall downwards, while large water-based rock cuttings are pushed towards the discharge end by the spiral 5 and discharged outwards through the feed hopper, thus completing the solid-liquid screening operation. Because the outer side of the arc screen 3 is provided with an installation frame that connects with the protruding rod 221, and the four corners of the installation frame are provided with connecting holes for the protruding rod 221 to pass through, and the protruding rod 221 is screwed with a nut to fix the arc screen 3, when the arc screen 3 is partially worn or damaged, the staff only needs to loosen the nut on the corresponding protruding rod 221 to remove the damaged single arc screen 3 from the protruding rod 221 for replacement. The remaining intact arc screens 3 do not need to be disassembled, and the entire screening cylinder 2 does not need to be disassembled. The maintenance and disassembly process is simple and quick. After the arc-shaped screen 3 is assembled, the inner surface of the arc-shaped screen 3, the inner surface of the support crossbar 22, and the inner wall of the screening cylinder 2 are on the same cylindrical surface. The inner wall transition is smooth without any protruding steps, which can effectively prevent materials from getting stuck and accumulating at the splicing gap.

[0019] In the embodiments of this utility model, please refer to Figures 1 to 4 A collection frame 4 for collecting mud is fixedly installed on the base frame 1. The collection frame 4 is located below the screening cylinder 2, and a discharge hopper 41 for discharging mud is fixedly installed at the bottom of the collection frame 4.

[0020] When in use, the drilling fluid that falls through the arc-shaped screen 3 will fall into the collection frame 4 below for collection. The collected drilling fluid can be discharged outward through the discharge hopper 41 and transported back to the drilling mud circulation system for reuse. In this embodiment, the collection frame 4 can completely collect the slurry from the screen, preventing the slurry from splashing everywhere and causing on-site pollution.

[0021] In the embodiments of this utility model, please refer to Figures 1 to 4 Both sides of the base frame 1 are fixedly installed with drive components that drive the screening cylinder 2. The drive components include drive wheels and motors for controlling the rotation of drive wheels. The drive wheels abut against the outer wall of the screening cylinder 2 and drive the screening cylinder 2 to rotate by friction transmission. The motor outputs torque to drive the drive wheels to rotate. The rotating drive wheels drive the screening cylinder 2 to rotate continuously between the two support rings 11 by friction, thereby providing a power source for screening operations.

[0022] In the later stages of use, technicians can determine whether the equipment needs to be cleaned by judging the state of the screen holes and the filtered rock debris in the arc-shaped screen 3. When the filtration effect is found to be substandard, the equipment can be stopped to clean the screen holes. Therefore, the excessive clogging of the screen holes during long-term use can be avoided, which will affect the overall screening effect of the equipment.

[0023] The working principle of the water-based rock debris screening device provided by this utility model is as follows: When in use, the equipment is connected to the site. The mixture of water-based drilling fluid and water-based rock cuttings is fed into the screening cylinder 2 through the external feeding hopper. The end of the screening cylinder 2 away from the feeding hopper is equipped with a discharge hopper to discharge the screened solid rock cuttings. When the drive unit drives the screening cylinder 2 to rotate continuously, the spiral strip 5 inside the screening cylinder 2 pushes the mixture towards the hopper side. During the material tumbling process, the liquid phase and fine particles fall into the liquid collection frame 4 through the arc screen 3, while large particles of water-based rock cuttings are pushed by the spiral strip 5 and finally discharged from the hopper. The drilling fluid collected inside the liquid collection frame 4 can be discharged from the discharge hopper 41 for recycling and reuse, thereby enabling the device to continuously and stably carry out the screening operation of water-based rock cuttings.

[0024] The drive component control involved in this utility model is a conventional technology in this field, and the circuits and controls involved are all existing technologies, which will not be described in detail here.

[0025] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A water-based rock debris screening device, comprising a base frame (1), wherein support rings (11) are fixedly installed on both sides of the top of the base frame (1), and a screening cylinder (2) for screening water-based rock debris is rotatably installed between the two support rings (11). Its features are: The outer wall of the screening cylinder (2) is provided with an installation groove (21), and multiple ring-shaped support crossbars (22) are fixedly installed inside the installation groove (21). A spiral strip (5) for conveying water-based rock cuttings is also fixedly installed inside the screening cylinder (2). Symmetrically distributed protruding rods (221) are fixedly installed on both sides of the outer wall of the support crossbar (22), and the same arc-shaped screen (3) is sleeved on the protruding rod (221) on the adjacent side between two adjacent support crossbars (22).

2. The water-based rock debris screening device according to claim 1, characterized in that, A collection frame (4) for collecting mud is fixedly installed on the base frame (1). The collection frame (4) is located below the screening cylinder (2), and a discharge hopper (41) for discharging mud is fixedly installed at the bottom of the collection frame (4).

3. The water-based rock debris screening device according to claim 1, characterized in that, The outer side of the arc-shaped screen (3) is provided with a mounting frame that connects with the protruding rod (221). The mounting frame has connecting holes at the four corners for the protruding rod (221) to pass through, and the protruding rod (221) is screwed with a nut to fix the arc-shaped screen (3).

4. The water-based rock debris screening device according to claim 1, characterized in that, Both sides inside the base frame (1) are fixedly installed with drive components that drive the screening cylinder (2).

5. The water-based rock debris screening device according to claim 1, characterized in that, The outer side of the support ring (11) is provided with a retaining ring (12), which is fixedly sleeved on the screening cylinder (2), and the side wall of the retaining ring (12) abuts against the side wall of the support ring (11).

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