A water-based drilling cuttings re-injection treatment device

Abstract

The utility model relates to the field of well drilling rock debris processing, especially a water base well drilling rock debris back injection processing device, the water base well drilling rock debris back injection processing device includes the grinding bin, the inside of grinding bin is equipped with the grinding assembly that carries out the grinding treatment to the rock debris, and the inside of grinding bin is equipped with the rotating cylinder that drives the grinding assembly still, the grinding assembly includes the inner grinding ring and the outer grinding ring, the inner grinding ring and the outer grinding ring all are equipped with a plurality of and vertical distribution. The water base well drilling rock debris back injection processing device provided by the utility model adopts split plug-in type grinding ring structure, each stage grinding ring is independent modular component, is assembled through the plug rod and the plug slot, and when single stage grinding ring wears and damages, can be individually disassembled and replaced, does not need to disassemble the whole set grinding assembly and bottom drive mechanism, shortens the on-site overhaul downtime, reduces the spare parts reserve, reduces the operation and maintenance cost, and the dismounting positioning is simple, and the operation is convenient.

Description

Technical Field

[0001] This utility model relates to the field of drilling cuttings treatment, and in particular to a water-based drilling cuttings reinjection treatment device. Background Technology

[0002] Water-based drilling operations generate a large amount of drilling cuttings, which are mixed with water-based drilling fluid and contain hard particles such as clay and quartz. Direct discharge of these cuttings can easily cause environmental pollution. Underground reinjection of drilling cuttings is a relatively mature and harmless disposal method. Drilling cuttings reinjection requires grinding the cuttings to a specific particle size and then preparing them into a slurry that can be pumped under high pressure and injected into the underground sealed formation. The grinding mechanism is the key equipment to ensure the effectiveness of drilling cuttings treatment.

[0003] In existing grinding mechanisms, the grinding cylinders are mostly of a single-piece structure. During the grinding process, grinding is carried out by the counter-rotation of two grinding cylinders. When the grinding cylinder is damaged due to excessive wear in a localized area, it is not possible to disassemble and replace the damaged part separately. Instead, the entire grinding cylinder needs to be disassembled and replaced, which increases the maintenance cost of the device in the later stage. Moreover, the material does not stay in the grinding zone for long enough due to the compression and shearing action on the rock chips. As a result, large particles are easily discharged without being crushed.

[0004] Therefore, it is necessary to provide a new water-based drilling cuttings reinjection 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 drilling cuttings reinjection treatment device.

[0006] The water-based drilling cuttings reinjection treatment device provided by this utility model includes a grinding chamber, which is equipped with a grinding component for grinding the cuttings, and a rotating cylinder for driving the grinding component is also provided inside the grinding chamber. The grinding assembly includes an inner grinding ring and an outer grinding ring. Multiple inner and outer grinding rings are provided and vertically distributed. The gap between the inner and outer grinding rings decreases from top to bottom, and the equivalent grinding mesh of the grinding working surfaces opposite the inner and outer grinding rings increases sequentially. The outer grinding ring is fixedly installed inside the grinding chamber, the inner grinding ring is fixedly installed on the rotating cylinder, and a grinding motor for driving the rotating cylinder is fixedly installed below the grinding chamber. The inner wall of the inner grinding ring is fixedly equipped with a plurality of circumferentially evenly distributed inner rods, and the outer wall of the outer grinding ring is fixedly equipped with a plurality of circumferentially evenly distributed outer rods; the inner wall of the grinding chamber is provided with a plurality of annularly distributed first slots, and the outer wall of the rotating cylinder is provided with a plurality of annularly distributed second slots. The plurality of inner rods are sequentially inserted into the corresponding second slots, and the plurality of outer rods are sequentially inserted into the corresponding first slots.

[0007] Preferably, a top ring is fixedly connected to the top of the grinding chamber, the bottom of the top ring abuts against the top of a plurality of outer insert rods, and a fixedly connected adapter rod is installed at the bottom of the top ring opposite to the first slot. The adapter rod is located in the first slot, and a pressure ring with the same fixed connection is installed between the plurality of adapter rods, and the bottom of the pressure ring abuts against the top of the uppermost outer grinding ring.

[0008] Preferably, a hexagonal rod is fixedly connected to the top of the rotating cylinder, and a compression cover for pressing the inner grinding ring is sleeved on the top of the rotating cylinder. A hexagonal groove adapted to the hexagonal rod is opened on the inner top of the compression cover. A support rod is fixedly connected to the top of the compression cover, and a rotating block is rotatably connected to the top of the support rod.

[0009] Preferably, a fixedly connected crossbar is mounted inside the top ring, and a fixedly connected limiting cylinder is installed at the center of the bottom of the crossbar, with the inner wall of the limiting cylinder abutting against the outer wall of the rotating block.

[0010] Preferably, a fixed support frame is installed at the bottom of the grinding chamber, and a fixed support frame is installed inside the support frame. The top of the support frame is fixedly connected to the grinding motor, and a cover is fixedly installed on the top of the support frame to cover the grinding motor. The top of the cover is rotatably connected to the bottom of the rotating cylinder.

[0011] Compared with related technologies, the water-based drilling cuttings reinjection treatment device provided by this utility model has the following beneficial effects: 1. This utility model adopts a split insert-type grinding ring structure. Each level of grinding ring is an independent modular component, which is assembled by inserting rods and slots. When a single level grinding ring is worn or damaged, it can be disassembled and replaced separately without disassembling the entire grinding assembly and the bottom drive mechanism. This shortens on-site maintenance downtime, reduces spare parts inventory, lowers maintenance costs, and makes disassembly and positioning simple and convenient. 2. The grinding rings of this utility model are arranged vertically in multiple layers, with the grinding gap narrowing from top to bottom, the equivalent grinding mesh of the working surface increasing step by step, and the rock chips completing coarse, medium, and fine grinding in sequence by their own weight. This extends the grinding time of the particles, reduces the escape of large particles, and produces uniform particle size. It can stably meet the particle size requirements of rock chip reinjection and reduce the risk of blockage in the subsequent grouting pipeline due to excessively large particles after grinding. Attached Figure Description

[0012] Figure 1 A schematic diagram of the structure of the water-based drilling cuttings reinjection treatment device provided by this utility model; Figure 2 for Figure 1 A partial cross-sectional structural diagram of the grinding chamber and its components is shown. Figure 3 for Figure 1 The diagram shows the structure of the grinding assembly. Figure 4 for Figure 3 The diagram shows the structure of the inner grinding ring. Figure 5 for Figure 3 The diagram shows the structure of the outer grinding ring. Figure 6 for Figure 1 A schematic diagram of the orientation structure of the cross-section of the rotating cylinder and the extrusion shroud shown; Figure 7 for Figure 1 The diagram shows a partial cross-sectional view of the top ring and its components.

[0013] The following are the labeling elements in the diagram: 1. Grinding chamber; 11. First slot; 2. Rotating cylinder; 21. Second slot; 22. Hexagonal rod; 3. Grinding assembly; 31. Inner grinding ring; 311. Inner insert rod; 32. Outer grinding ring; 321. Outer insert rod; 4. Top ring; 41. Crossbar; 411. Limiting cylinder; 42. Adapter rod; 421. Pressure ring; 5. Support frame; 51. Support bracket; 52. Baffle; 6. Extrusion cover; 61. Hexagonal groove; 62. Support rod; 63. Rotating block; 7. Grinding motor. 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 7 This utility model provides a water-based drilling cuttings reinjection treatment device, which includes a grinding chamber 1. The grinding chamber 1 is equipped with a grinding component 3 for grinding the cuttings, and the grinding chamber 1 is also equipped with a rotating cylinder 2 for driving the grinding component 3.

[0017] In the embodiments of this utility model, please refer to Figures 1 to 7The grinding assembly 3 includes an inner grinding ring 31 and an outer grinding ring 32. Multiple inner grinding rings 31 and outer grinding rings 32 are provided and vertically distributed. The gap between the inner grinding ring 31 and the outer grinding ring 32 decreases from top to bottom, and the equivalent grinding mesh of the grinding working surfaces opposite the inner grinding ring 31 and the outer grinding ring 32 increases sequentially. The outer grinding ring 32 is fixedly installed inside the grinding chamber 1, the inner grinding ring 31 is fixedly installed on the rotating cylinder 2, and a grinding motor 7 that drives the rotating cylinder 2 is fixedly installed below the grinding chamber 1.

[0018] It should be noted that when the grinding motor 7 is working, it drives the rotating cylinder 2 to rotate. The rotating cylinder 2 drives the inner grinding rings 31 of each stage to rotate synchronously. The relatively stationary outer grinding ring 32 and the rotating inner grinding ring 31 form a grinding gap, which can grind the added rock chips. Since the grinding gap gradually narrows from top to bottom and the equivalent grinding mesh of the working surface gradually increases, the rock chips are successively subjected to coarse grinding, medium grinding and fine grinding, which prolongs the time when the particles are subjected to shearing and extrusion, effectively inhibits the escape of large particles, and ensures that the particle size of the ground material meets the requirements for reinjection. In this embodiment, the inner grinding ring 31 and the outer grinding ring 32, which are set in stages, are independent separate components. When a single grinding ring is worn or damaged, the component of that stage can be disassembled and replaced separately without having to disassemble the entire grinding assembly 3, thus reducing the downtime for drilling site maintenance.

[0019] In the embodiments of this utility model, please refer to Figures 1 to 7 The inner wall of the inner grinding ring 31 is fixedly installed with a plurality of circumferentially evenly distributed inner rods 311, and the outer wall of the outer grinding ring 32 is fixedly installed with a plurality of circumferentially evenly distributed outer rods 321. The inner wall of the grinding chamber 1 is provided with a plurality of annularly distributed first slots 11, and the outer wall of the rotating cylinder 2 is provided with a plurality of annularly distributed second slots 21. The plurality of inner rods 311 are sequentially inserted into the corresponding second slots 21, and the plurality of outer rods 321 are sequentially inserted into the corresponding first slots 11.

[0020] It should be noted that the inner grinding ring 31 is inserted into the second slot 21 of the rotating cylinder 2 by means of the inner insert rod 311, so as to achieve radial positioning and torque transmission, and ensure that the inner grinding ring 31 can rotate synchronously when the rotating cylinder 2 rotates. The outer grinding ring 32 is inserted into the first slot 11 on the inner wall of the grinding chamber 1 by the outer insertion rod 321 to achieve circumferential positioning, so that the outer grinding ring 32 remains stationary inside the grinding chamber 1. The insertion assembly form facilitates the quick disassembly and removal of the single-stage grinding ring. In this embodiment, the slot provides radial and circumferential limiting for the insertion rod, preventing the grinding ring from shifting circumferentially during the grinding process, ensuring stable grinding gap dimensions, and avoiding fluctuations in the grinding effect due to component misalignment.

[0021] In the embodiments of this utility model, please refer to Figures 1 to 7 A top ring 4 is fixedly connected to the top of the grinding chamber 1. The bottom of the top ring 4 abuts against the top of multiple outer insert rods 321. A fixedly connected adapter rod 42 is installed at the bottom of the top ring 4 opposite to the first slot 11. The adapter rod 42 is located inside the first slot 11. A pressure ring 421 is fixedly connected between multiple adapter rods 42. The bottom of the pressure ring 421 abuts against the top of the uppermost outer grinding ring 32. A fixedly connected hexagonal rod 22 is installed at the top of the rotating cylinder 2. A compression cover 6 for squeezing the inner grinding ring 31 is fitted on the top of the rotating cylinder 2. A hexagonal groove 61 adapted to the hexagonal rod 22 is opened on the inner top of the compression cover 6. A fixedly connected support rod 62 is installed at the top of the compression cover 6. A rotating block 63 is rotatably connected to the top of the support rod 62. A fixedly connected crossbar 41 is mounted inside the top ring 4. A fixedly connected limiting cylinder 411 is installed at the center of the bottom of the crossbar 41. The inner wall of the limiting cylinder 411 abuts against the outer wall of the rotating block 63.

[0022] After the top ring 4 is assembled, the pressure ring 421 and the extrusion cover 6 can form a downward axial clamping constraint on the multi-stage outer grinding ring 32 and inner grinding ring 31 as a whole, which restricts the vertical movement of the outer grinding ring 32 and inner grinding ring 31 during the operation and ensures the vertical assembly stability of the outer grinding ring 32 and inner grinding ring 31 at each stage. The top ring 4, the adapter rod 42, and the pressure ring 421 form an integral clamping structure. When disassembling and assembling, simply remove the top ring 4, and the pressure ring 421 will be moved out along with the top ring 4, which will release the clamping constraint of the outer grinding ring 32 and the extrusion cover 6, making it convenient for the staff to pull out and disassemble the outer grinding ring 32, the extrusion cover 6, and the inner grinding ring 31 below. The extrusion cover 6 cooperates with the hexagonal rod 22 through the hexagonal groove 61. When the rotating cylinder 2 rotates, it can drive the extrusion cover 6 to rotate synchronously, thereby throwing the rock chips on the surface of the extrusion cover 6 outward and reducing the residue of rock chips on the surface of the extrusion cover 6. The rotating block 63 can rotate freely inside the limiting cylinder 411, and the limiting cylinder 411 provides radial limit for the rotating block 63. Without hindering the extrusion cover 6 from rotating with the rotating cylinder 2, it can limit the radial displacement of the extrusion cover 6.

[0023] In the embodiments of this utility model, please refer to Figures 1 to 7 The bottom of the grinding chamber 1 is equipped with a fixed support frame 5. Inside the support frame 5, a fixed support bracket 51 is installed. The top of the support bracket 51 is fixedly connected to the grinding motor 7. A cover 52 is fixedly installed on the top of the support bracket 51 to cover the grinding motor 7. The top of the cover 52 is rotatably connected to the bottom of the rotating cylinder 2.

[0024] It should be noted that: the support frame 5 provides overall support for the entire grinding chamber 1, the support frame 51 is used to fix and support the grinding motor 7, and the cover 52 covers and protects the grinding motor 7 to prevent mud and rock chips from splashing downwards and falling into the motor during the grinding process, causing damage to the motor. The upper end of the baffle 52 is rotatably engaged with the bottom of the rotating cylinder 2, which neither interferes with the rotational movement of the rotating cylinder 2 nor prevents solid materials from penetrating downward into the motor installation area. The ground product is discharged outward through the discharge port inside the support frame 51, which facilitates the transport of the ground rock chips to the rear for subsequent reinjection operations.

[0025] The working principle of the water-based drilling cuttings reinjection treatment device provided by this utility model is as follows: When in use, the water-based drilling cuttings that have undergone external screening and pretreatment can be put into the grinding chamber 1 from the top. Then the grinding motor 7 can be started to drive the rotating cylinder 2 to rotate. The rotating cylinder 2 will drive multiple sets of inner grinding rings 31 to rotate synchronously. The grinding gap between the inner grinding ring 31 and the stationary outer grinding ring 32 gradually decreases from top to bottom, allowing the rock chips to flow downwards by their own weight, passing through each grinding gap in turn, and completing the graded shearing and crushing of coarse grinding, medium grinding and fine grinding step by step. The material after grinding is discharged from the bottom of the grinding chamber 1 and transported to the external slurry mixing equipment to complete the slurry preparation, and then transported to the grouting equipment for underground reinjection operation. When a certain grinding ring is worn and damaged and needs to be replaced, remove the top ring 4, take out the pressure ring 421 and the extrusion cover 6, and then pull out the corresponding damaged inner grinding ring 31 or outer grinding ring 32 directly upwards. After replacing the new grinding ring component, the pressure ring 421, extrusion cover 6 and top ring 4 are reassembled in sequence, and the machine can continue to be put into operation without disassembling the bottom drive assembly of the whole machine.

[0026] The start-stop control of the grinding motor 7 in this utility model is a conventional technology in the field. The circuits and controls involved are all existing technologies and will not be described in detail here.

[0027] 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 drilling cuttings reinjection treatment device, comprising a grinding chamber (1), wherein the grinding chamber (1) is provided with a grinding component (3) for grinding cuttings, and the grinding chamber (1) is also provided with a rotating cylinder (2) for driving the grinding component (3). Its features are: The grinding assembly (3) includes an inner grinding ring (31) and an outer grinding ring (32). Multiple inner grinding rings (31) and outer grinding rings (32) are provided and vertically distributed. The gap between the inner grinding ring (31) and the outer grinding ring (32) decreases from top to bottom. The equivalent grinding mesh of the grinding working surfaces opposite the inner grinding ring (31) and the outer grinding ring (32) increases sequentially. The outer grinding ring (32) is fixedly installed inside the grinding chamber (1), the inner grinding ring (31) is fixedly installed on the rotating cylinder (2), and a grinding motor (7) for driving the rotating cylinder (2) is fixedly installed below the grinding chamber (1). The inner wall of the inner grinding ring (31) is fixedly equipped with a plurality of circumferentially evenly distributed inner rods (311), the outer wall of the outer grinding ring (32) is fixedly equipped with a plurality of circumferentially evenly distributed outer rods (321), the inner wall of the grinding chamber (1) is provided with a plurality of annularly distributed first slots (11), the outer wall of the rotating cylinder (2) is provided with a plurality of annularly distributed second slots (21), the plurality of inner rods (311) are sequentially inserted into the corresponding second slots (21), and the plurality of outer rods (321) are sequentially inserted into the corresponding first slots (11).

2. The water-based drilling cuttings reinjection treatment device according to claim 1, characterized in that, The grinding chamber (1) is equipped with a fixedly connected top ring (4). The bottom of the top ring (4) abuts against the top of multiple outer insert rods (321). The bottom of the top ring (4) is equipped with a fixedly connected adapter rod (42) at the opposite part of the first slot (11). The adapter rod (42) is located in the first slot (11). The multiple adapter rods (42) are equipped with the same fixedly connected pressure ring (421), and the bottom of the pressure ring (421) abuts against the top of the uppermost outer grinding ring (32).

3. The water-based drilling cuttings reinjection treatment device according to claim 1, characterized in that, The top of the rotating cylinder (2) is fitted with a fixed hexagonal rod (22), and the top of the rotating cylinder (2) is fitted with a compression cover (6) for pressing the inner grinding ring (31). The inner top of the compression cover (6) is provided with a hexagonal groove (61) that matches the hexagonal rod (22). The top of the compression cover (6) is fitted with a fixed support rod (62), and the top of the support rod (62) is fitted with a rotating block (63) that is rotatably connected.

4. The water-based drilling cuttings reinjection treatment device according to claim 2, characterized in that, The top ring (4) is equipped with a fixedly connected crossbar (41) inside. A fixedly connected limiting cylinder (411) is installed at the center of the bottom of the crossbar (41), and the inner wall of the limiting cylinder (411) abuts against the outer wall of the rotating block (63).

5. The water-based drilling cuttings reinjection treatment device according to claim 1, characterized in that, The bottom of the grinding chamber (1) is equipped with a fixed support frame (5), and the inside of the support frame (5) is equipped with a fixed support frame (51). The top of the support frame (51) is fixedly connected to the grinding motor (7). A cover (52) is fixedly installed on the top of the support frame (51) to cover the grinding motor (7), and the top of the cover (52) is rotatably connected to the bottom of the rotating cylinder (2).

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