Drilling fluid skimming tank

Abstract

The utility model relates to the technical field of design and manufacture of drilling equipment, and discloses a drilling fluid skimming tank which comprises a shell, a plurality of parallel plates are fixedly connected in the shell, parallel partition plates are fixedly connected in the shell, partition plates are fixedly connected in the shell, a supporting frame is fixedly connected to the rear sides of the partition plates, and the supporting frame is fixedly connected to the rear sides of the partition plates. The top of the supporting frame is fixedly connected with an oil collecting box, the rear side of the oil collecting box is fixedly connected with an oil inlet, and the left side of the oil collecting box is fixedly connected with an oil conveying branch pipe. According to the utility model, drilling fluid enters the area where the parallel plates are located after silt is filtered through the coarse filtering shaft and the fine filtering shaft, oil and other materials in the drilling fluid are settled due to the existence of the multiple layers of parallel plates, the separated oil enters the oil collecting box through the oil inlet, and the settled water and other materials pass through the centrifugal shaft, so that the oil and other materials are separated from the oil collecting box. The centrifugal motor drives the centrifugal shaft to rotate, so that water and residual oil are centrifugally separated.

Description

Technical Field

[0001] This utility model relates to the field of drilling equipment design and manufacturing technology, and in particular to a drilling fluid skimming tank. Background Technology

[0002] Drilling fluids typically require skimming, especially during oil and gas drilling. When drilling fluids come into contact with oil formations, they may become contaminated with oily substances, affecting their performance and drilling efficiency. To address this issue, drilling fluid skimming tanks are widely used. A drilling fluid skimming tank is a specially designed device used to separate oily substances from drilling fluids, removing oil contaminants and maintaining the cleanliness and performance stability of the drilling fluid. By skimming, the negative impact of oil contamination on drilling fluid performance can be prevented, thereby improving the smoothness and cost-effectiveness of drilling operations. Therefore, using drilling fluid skimming tanks is an important means of ensuring drilling fluid quality, extending its service life, and improving drilling efficiency.

[0003] In existing technologies, many drilling fluid oil-water separation devices employ simple sedimentation or centrifugation methods to remove oil from the drilling fluid. However, these traditional separation technologies have certain limitations. First, existing oil-water separation technologies are not entirely satisfactory in terms of separation efficiency, often failing to achieve complete oil-liquid separation. Especially when the oil-water ratio in the drilling fluid is high, traditional separation methods often result in incomplete separation of oil and drilling fluid, leading to oil residue, poor drilling fluid recycling, and even ineffective skimming, affecting the normal operation of the drill bit. Therefore, a drilling fluid skimming tank is proposed to address these problems. Utility Model Content

[0004] To overcome the above deficiencies, this utility model provides a drilling fluid skimming tank, which aims to improve the problem in the prior art where the lack of skimming components or the simplistic skimming method for used drilling fluid results in ineffective or non-extractable skimming, thus affecting the use of drill bits.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a drilling fluid skimming tank, comprising a shell, a centrifugal separation component for providing centrifugal separation fixedly connected inside the shell, multiple parallel plates fixedly connected inside the shell, parallel partitions fixedly connected inside the shell, a dividing plate fixedly connected inside the shell, a support frame fixedly connected to the rear side of the dividing plate, an oil collection box fixedly connected to the top of the support frame, an oil inlet fixedly connected to the rear side of the oil collection box, and an oil delivery branch pipe fixedly connected to the left side of the oil collection box;

[0006] As a further description of the above technical solution: the centrifugal separation assembly includes a centrifugal motor, the centrifugal motor is fixedly connected inside the housing, and a centrifugal shaft is fixedly connected to the front side of the centrifugal motor;

[0007] As a further description of the above technical solution: a coarse filter shaft is fixedly connected inside the housing, a fine filter shaft is fixedly connected inside the housing, and two converging blocks are fixedly connected inside the housing. The front converging block is in contact with the inner wall of the housing, and the rear converging block is fixedly connected to the bottom of the coarse filter shaft and the fine filter shaft. A slag discharge port is fixedly connected to the bottom of the housing, and a support is fixedly connected to the bottom of the housing.

[0008] As a further description of the above technical solution: a valve is rotatably connected inside the slag discharge port, a return spring is fixedly connected to the top of the valve, the other end of the return spring is fixedly connected to the inside of the bracket, a rotating motor is fixedly connected inside the bracket, an eccentric shaft is fixedly connected to the front side of the rotating motor, the eccentric shaft is in contact with the valve, and a rotating groove is opened inside the bracket to provide space for the rotation of the valve and the eccentric shaft;

[0009] As a further description of the above technical solution: a mud and sand box is slidably connected to the bottom of the shell, a feed inlet is fixedly connected to the front side of the shell, and a water outlet is fixedly connected to the rear side of the shell.

[0010] As a further description of the above technical solution: an oil outlet is fixedly connected to the rear side of the housing, a main oil supply pipe is fixedly connected to the top of the oil outlet, and the other end of the branch oil supply pipe is fixedly connected to the outside of the main oil supply pipe.

[0011] As a further description of the above technical solution: the plurality of parallel plates are parallelograms, the plurality of parallel plates are distributed in parallel inside the shell, and a space is left between the plurality of parallel plates and the bottom of the shell.

[0012] As a further description of the above technical solution: the front side of the parallel partition is in contact with the parallel plate, and there is a space between the parallel partition and the inner bottom of the shell.

[0013] This utility model has the following beneficial effects:

[0014] 1. In this utility model, after the drilling fluid is filtered through the coarse and fine filter shafts to remove mud and sand, it enters the area where the parallel plates are located. The presence of multiple parallel plates causes the oil and other materials in the drilling fluid to settle, thus separating the oil from the other materials. The oil enters the oil collection box through the oil inlet, and then enters the main oil pipeline through the oil branch pipe. When the settled water and other materials pass through the centrifugal shaft, the centrifugal motor drives the centrifugal shaft to rotate, thereby causing the water and other materials to be separated by centrifugal force, further separating the oil that was not completely separated during settling. Then, the separated oil flows into the main oil pipeline through the oil outlet, thereby making the rheological properties of the drilling fluid more stable and helping to improve its lubricity and fluidity.

[0015] 2. In this utility model, drilling fluid enters the device through the inlet and then passes through the coarse and fine filter shafts, where mud and sand adhering to the drilling fluid during use are filtered. The filtered mud and sand are then collected by two collecting blocks. At this time, the rotating motor drives the eccentric shaft to rotate, causing the valve to rotate and thus opening and closing the valve. The return spring resets the valve, and finally, the mud and sand flow into the mud and sand box through the slag discharge port for collection. This allows the oil skimmed off from the drilling fluid through the coarse and fine filter shafts to be recycled, thereby improving the utilization rate of the drilling fluid and reducing drilling costs. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of a drilling fluid skimming tank proposed in this utility model;

[0017] Figure 2 This is a schematic diagram of the oil collection box of a drilling fluid skimming tank proposed in this utility model;

[0018] Figure 3 This is a schematic diagram of the centrifugal shaft of a drilling fluid skimming tank proposed in this utility model;

[0019] Figure 4 This is a schematic diagram of the mud and sand box of a drilling fluid skimming tank proposed in this utility model.

[0020] Legend:

[0021] 1. Shell; 2. Feed inlet; 3. Coarse filter shaft; 4. Fine filter shaft; 5. Converging block; 6. Parallel plate; 7. Oil inlet; 8. Oil collection box; 9. Divider plate; 10. Support frame; 11. Oil delivery branch pipe; 12. Centrifugal shaft; 13. Centrifugal motor; 14. Oil outlet; 15. Main oil delivery pipe; 16. Parallel partition plate; 17. Water outlet; 18. Bracket; 19. Sludge box; 20. Rotating motor; 21. Eccentric shaft; 22. Valve; 23. Return spring; 24. Slag discharge port. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Reference Figure 1 , Figure 2 , Figure 3 This utility model provides an embodiment of a drilling fluid skimming tank, comprising a shell 1. The shell 1 is the external structure of the entire device, responsible for housing all internal components and providing certain support and protection functions. A centrifugal separation assembly for centrifugal separation is fixedly connected inside the shell 1. The centrifugal separation assembly includes a centrifugal motor 13, which is the power source for the entire centrifugal separation process. Its function is to drive a centrifugal shaft 12 to rotate at high speed, thereby separating oil and drilling fluid in the centrifugal separation assembly. The centrifugal motor 13 is fixedly connected inside the shell 1, and the centrifugal shaft 12 is fixedly connected to its front side. The centrifugal shaft 12 achieves centrifugal action through the rotation of the centrifugal motor 13. Multiple parallel plates 6 are fixedly connected inside the shell 1, and the parallel plates 6 provide a separation area for oil-water sedimentation separation. Multiple parallel plates 6 are arranged in parallel, and there are separation channels with certain gaps between the multiple parallel plates 6 and the shell 1. These gaps help the separation of liquids. Parallel partitions 16 are fixedly connected inside the shell 1. The parallel partitions 16 isolate the fine filter shaft 4 from the parallel plates 6 to prevent the drilling fluid from flowing back and re-mixing with the filtered impurities.

[0024] A partition plate 9 is fixedly connected inside the shell 1. The partition plate 9 forms a sedimentation separation zone and a centrifugal separation zone inside the shell 1. The two zones are used for different treatment or separation stages of the liquid. A support frame 10 is fixedly connected to the rear side of the partition plate 9. The support frame 10 supports the oil collection box 8 and ensures that the oil collection box 8 can be stably installed inside the shell 1. The oil collection box 8 is fixedly connected to the top of the support frame 10. The oil collection box 8 is used to collect the oil after sedimentation separation. An oil inlet 7 is fixedly connected to the rear side of the oil collection box 8. The oil inlet 7 is the entrance for the oil separated from the drilling fluid to enter the oil collection box 8. An oil outlet 14 is fixedly connected to the rear side of the shell 1. The oil outlet 14 is used to discharge the oil from the sedimentation separation. The oil obtained after centrifugal separation is discharged to the external system. The top of the oil outlet 14 is fixedly connected to the main oil pipe 15, and the left side of the oil collection box 8 is fixedly connected to the branch oil pipe 11. The function of the branch oil pipe 11 and the main oil pipe 15 is to transport the separated oil to a designated location, specifically to recycle the oil or send it to a waste oil treatment device as needed. Multiple parallel plates 6 are parallelograms and are distributed in parallel inside the shell 1. There is a space between the multiple parallel plates 6 and the bottom of the shell 1. The front side of the parallel partition 16 is in contact with the parallel plates 6, and there is a space between the parallel partition 16 and the bottom of the shell 1.

[0025] Reference Figure 1 , Figure 3 , Figure 4 The casing 1 has a coarse filter shaft 3 and a fine filter shaft 4 fixedly connected inside. The coarse filter shaft 3 and fine filter shaft 4 are responsible for filtering the incoming drilling fluid to different degrees. The coarse filter shaft 3 is typically used to filter larger solid particles, while the fine filter shaft 4 is specifically used to filter finer impurities. Two collecting blocks 5 are fixedly connected inside the casing 1. The collecting blocks 5 collect the impurities filtered through the coarse and fine filters to the slag discharge port 24. The front collecting block 5 is in contact with the inner wall of the casing 1, and the rear collecting block 5 is fixedly connected to the bottom of the coarse filter shaft 3 and the fine filter shaft 4. The slag discharge port 24 is fixedly connected to the bottom of the casing 1. The slag discharge port 24 is used to discharge the solid waste obtained after the filtration process. To prevent impurities from clogging the port, the slag discharge port 24 is located at the bottom of the casing 1, and a support 18 is fixedly connected to the bottom of the casing 1.

[0026] A valve 22 is rotatably connected inside the slag discharge port 24. The function of valve 22 is to control the opening and closing of the slag discharge port 24 so that it can be opened when solid waste needs to be discharged. A return spring 23 is fixedly connected to the top of valve 22. After the deflector shaft moves valve 22 away from its initial position (open state), the return spring 23 can push valve 22 back to its initial state. The other end of the return spring 23 is fixedly connected to the inside of the bracket 18. A rotary motor 20 is fixedly connected inside the bracket 18. An eccentric shaft 21 is fixedly connected to the front side of the rotary motor 20. The rotary motor 20 is used to drive the rotation of the eccentric shaft 21. The rotation of 1 opens and closes the slag discharge port 24. The eccentric shaft 21 is in contact with the valve 22. The inside of the bracket 18 is provided with a rotating groove, which provides space for the rotation of the valve 22 and the eccentric shaft 21. The bottom of the housing 1 is slidably connected to a mud and sand box 19, which is used to collect the mud and sand and solid particles obtained after filtration. The front side of the housing 1 is fixedly connected to a feed port 2, which is the inlet for drilling fluid to enter the entire equipment. The rear side of the housing 1 is fixedly connected to a water outlet 17, which is the channel for the treated drilling fluid to be discharged. The other end of the oil branch pipe 11 is fixedly connected to the outside of the oil main pipe 15.

[0027] Working principle: Drilling fluid enters the casing 1 through the inlet 2. Inside the casing 1, it first undergoes coarse filtration through the coarse filter shaft 3 to remove larger solid particles. The coarsely filtered drilling fluid then enters the fine filter shaft 4 to further remove smaller impurities. The filtered drilling fluid flows through multiple parallel plates 6, which provide an oil-water separation zone, aiding in oil-water separation through gravity. The oil in the drilling fluid settles into the lower oil collection box 8 by gravity, while the water continues to flow downwards through the gaps between the parallel plates 6.

[0028] During separation, the centrifugal motor 13 drives the centrifugal shaft 12 to rotate at high speed, generating a strong centrifugal force, which further accelerates the oil-water separation process. Through centrifugal action, the separated oil is discharged through the oil outlet 14 and enters the external system. The oil outlet 14 is connected to the main oil pipe 15. The branch oil pipes 11 collect the oil into the main oil pipe 15, and then the main oil pipe 15 transports the oil to a designated location for recycling or to a waste oil treatment device.

[0029] During the filtration process, solid impurities (including silt and other solid particles) are collected by two collecting blocks 5, and these impurities are eventually discharged through the slag discharge port 24. The slag discharge port 24 is driven by a rotating motor 20, which drives an eccentric shaft 21 to control the opening and closing of the valve 22, ensuring that solid waste can be discharged smoothly. When the valve 22 is open, the sediment is discharged into the lower silt box 19 for collection. The valve 22 of the slag discharge port 24 is automatically reset by a return spring 23, ensuring a smooth slag discharge process.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A drilling fluid skimming tank, comprising a shell (1), characterized in that: The shell (1) is fixedly connected to a centrifugal separation assembly for centrifugal separation. The shell (1) is fixedly connected to multiple parallel plates (6). The shell (1) is fixedly connected to a parallel partition (16). The shell (1) is fixedly connected to a partition plate (9). The partition plate (9) is fixedly connected to a support frame (10) on its rear side. The support frame (10) is fixedly connected to an oil collection box (8) on its top. The oil collection box (8) is fixedly connected to an oil inlet (7) on its rear side. The oil collection box (8) is fixedly connected to an oil delivery branch pipe (11) on its left side.

2. The drilling fluid skimming tank according to claim 1, characterized in that: The centrifugal separation assembly includes a centrifugal motor (13), which is fixedly connected inside the housing (1), and a centrifugal shaft (12) is fixedly connected to the front side of the centrifugal motor (13).

3. The drilling fluid skimming tank according to claim 1, characterized in that: The housing (1) is fixedly connected to a coarse filter shaft (3) and a fine filter shaft (4). The housing (1) is fixedly connected to two converging blocks (5). The front converging block (5) is in contact with the inner wall of the housing (1), and the rear converging block (5) is fixedly connected to the bottom of the coarse filter shaft (3) and the fine filter shaft (4). The bottom of the housing (1) is fixedly connected to a slag discharge port (24), and the bottom of the housing (1) is fixedly connected to a bracket (18).

4. A drilling fluid skimming tank according to claim 3, characterized in that: A valve (22) is rotatably connected inside the slag discharge port (24). A return spring (23) is fixedly connected to the top of the valve (22). The other end of the return spring (23) is fixedly connected inside the bracket (18). A rotating motor (20) is fixedly connected inside the bracket (18). An eccentric shaft (21) is fixedly connected to the front side of the rotating motor (20). The eccentric shaft (21) is in contact with the valve (22). A rotating groove is provided inside the bracket (18). The rotating groove provides space for the rotation of the valve (22) and the eccentric shaft (21).

5. A drilling fluid skimming tank according to claim 1, characterized in that: The bottom of the shell (1) is slidably connected to a sand box (19), the front side of the shell (1) is fixedly connected to a feed inlet (2), and the rear side of the shell (1) is fixedly connected to a water outlet (17).

6. A drilling fluid skimming tank according to claim 1, characterized in that: An oil outlet (14) is fixedly connected to the rear side of the housing (1), and an oil main pipe (15) is fixedly connected to the top of the oil outlet (14). The other end of the oil branch pipe (11) is fixedly connected to the outside of the oil main pipe (15).

7. A drilling fluid skimming tank according to claim 1, characterized in that: The multiple parallel plates (6) are parallelograms, and the multiple parallel plates (6) are distributed in parallel inside the shell (1), with a space left between the multiple parallel plates (6) and the bottom of the shell (1).

8. A drilling fluid skimming tank according to claim 1, characterized in that: The front side of the parallel partition (16) is in contact with the parallel plate (6), and there is a space between the parallel partition (16) and the inner bottom of the shell (1).

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