Reverse filling device based on drilling mud recycling

Abstract

The utility model discloses a reverse filling device based on drilling mud reutilization, which comprises a mounting table, an operating head and a drill rod, the operating head is connected with the drill rod through a rotary joint, a third valve is fixed at the top of the operating head, a built-in pipe communicated with the third valve is welded on the inner wall of the top of the operating head, and a fourth valve is fixed on the side surface of the operating head. A second connecting pipe is fixed to the top of the third valve, a first conveying pump is fixed to one end of the second connecting pipe, and one end of the first conveying pump is connected with a drilling mud treatment assembly. Pressure difference is generated through the first conveying pump, drilling mud in a well is sucked into the drill rod and flows back to the mud pool after being treated by the treatment assembly, the treated mud is pumped into the drill rod again through the second conveying pump and is reversely poured to the well wall, and a complete mud recycling system is formed. A drilling mud treatment assembly arranged on the device comprises a desanding mechanism and a performance adjusting mechanism, and the desanding mechanism achieves solid-liquid separation through a hydrocyclone and removes sand grains in mud.

Description

Technical Field

[0001] This utility model relates to the field of drilling mud backflow technology, and in particular to a backflow device based on drilling mud reuse. Background Technology

[0002] In drilling projects for resources such as oil and natural gas, drilling mud is an indispensable key material. It not only plays a role in cooling and lubrication when the drill bit breaks rocks, reducing the wear of the drill bit and extending its service life, but also carries the rock cuttings generated during the drilling process and brings them out of the wellhead, ensuring the smooth progress of drilling operations. At the same time, drilling mud forms a mud cake on the well wall, which can effectively stabilize the well wall, prevent well wall collapse, and ensure drilling safety.

[0003] Traditional drilling operations have drawbacks in terms of mud usage. During the drilling process, a large amount of used drilling mud is continuously generated in the well. This mud contains rock cuttings, sand particles, and various chemicals. The traditional treatment method is often to directly discharge it into the surrounding environment. This not only causes a huge waste of resources, but also causes serious pollution to the surrounding soil, water sources and other ecological environments, and disrupts the ecological balance. Some existing drilling mud recycling and treatment devices have problems such as low recycling efficiency and poor treatment effect. Some devices cannot effectively separate solid impurities in the mud, resulting in a decline in the performance of the recycled mud, which is difficult to meet the requirements of drilling operations again. It is necessary to prepare new mud, which further increases costs and resource consumption.

[0004] Therefore, developing a device that can efficiently recycle and process drilling mud so that it can be reused in the drilling process is of great practical significance, thereby reducing drilling costs, reducing resource waste, mitigating environmental pollution, and achieving sustainable development of drilling engineering. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a reverse injection device based on the reuse of drilling mud.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A reverse injection device based on drilling mud reuse includes a mounting platform, an operating head, and a drill pipe. The operating head and the drill pipe are connected by a rotary joint. A valve three is fixed on the top of the operating head. An internal pipe communicating with the valve three is welded to the inner wall of the top of the operating head. A valve four is welded to the side of the operating head. A connecting pipe two is fixed on the top of the valve three. A delivery pump one is fixed to one end of the connecting pipe two. A drilling mud treatment component is connected to one end of the delivery pump one.

[0008] As a further embodiment of this utility model: the drilling mud treatment component includes a desanding mechanism and a performance adjustment mechanism. The desanding mechanism includes a discharge pipe, a hydrocyclone, and an inlet pipe. The hydrocyclone is fixed to the top outer wall of the mounting platform by a bracket. The inlet pipe and the discharge pipe are respectively welded to the side wall of the hydrocyclone and the top outer wall of the hydrocyclone. The inlet pipe and the delivery pump are fixedly connected.

[0009] As a further embodiment of this utility model: the performance adjustment mechanism includes a mixing cylinder and an intermediate pipe. The mixing cylinder is fixed to the outer wall of the top of the mounting platform, the intermediate pipe is welded to the outer wall of the top of the mixing cylinder, and the intermediate pipe and the discharge pipe are fixedly connected by a connecting pipe.

[0010] As a further embodiment of this utility model: a valve is fixed to the outer wall of the top of the mixing cylinder, and a hopper is fixed to the top of the valve.

[0011] As a further embodiment of this utility model: a drive motor is fixed to the outer wall of the top of the mixing cylinder, and the output end of the drive motor is connected to a stirring rod through a coupling. Stirring blades are welded to the outer wall of the stirring rod.

[0012] As a further embodiment of this utility model: a valve two is fixed to the bottom outer wall of the mixing cylinder, and a connecting pipe four is fixed to the bottom outer wall of the valve two.

[0013] As a further improvement of this utility model: the mounting platform is provided with a mud tank inside, and the connecting pipe is connected to the mud tank.

[0014] As a further embodiment of this utility model: a second conveying pump is fixed to one end of the valve four, and a third connecting pipe is fixed to one end of the second conveying pump, which is connected to the mud tank.

[0015] Compared with the prior art, this utility model provides a reverse injection device based on drilling mud reuse, which has the following beneficial effects:

[0016] 1. The drilling mud is drawn into the drill pipe by the pressure difference generated by the first delivery pump. After being processed by the treatment component, it is returned to the mud pool. Then, the treated mud is pumped back into the drill pipe and back into the well wall by the second delivery pump, forming a complete mud recycling system.

[0017] 2. The drilling mud treatment components equipped with the device include a desanding mechanism and a performance adjustment mechanism. The desanding mechanism uses a hydrocyclone to achieve solid-liquid separation and remove sand particles from the mud.

[0018] 3. The performance adjustment mechanism can add materials such as bentonite to the desanded mud and mix them evenly to adjust the mud's density, viscosity and other parameters, thereby improving mud performance and enhancing drilling results.

[0019] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This utility model has a simple structure and is easy to operate. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a reverse injection device based on drilling mud reuse proposed in this utility model.

[0021] Figure 2 This is a schematic diagram of the performance adjustment mechanism of a reverse injection device based on drilling mud reuse proposed in this utility model.

[0022] Figure 3 This is a schematic diagram of the overall structure of the reverse injection component of a reverse injection device based on drilling mud reuse proposed in this utility model;

[0023] Figure 4 This is an exploded structural diagram of the backflow component of a backflow device based on drilling mud reuse proposed in this utility model.

[0024] In the diagram: 1. Mounting platform; 2. Mud pit; 3. Mixing cylinder; 4. Connecting pipe 1; 5. Discharge pipe; 6. Hydrocyclone; 7. Inlet pipe; 8. Conveying pump 1; 9. Connecting pipe 2; 10. Operating head; 11. Connecting pipe 3; 12. Intermediate pipe; 13. Valve 1; 14. Hopper; 15. Drive motor; 16. Stirring rod; 17. Stirring blade; 18. Valve 2; 19. Connecting pipe 4; 20. Valve 3; 21. Conveying pump 2; 22. Drill rod; 23. Rotary joint; 24. Internal pipe; 25. Valve 4. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] A reverse injection device based on drilling mud reuse, such as Figures 1 to 4 As shown, the system includes an installation platform 1, an operating head 10, and a drill pipe 22. A mud tank 2 is located inside the installation platform 1. The operating head 10 and the drill pipe 22 are connected via a rotary joint 23. A valve 3 20 is fixed to the top of the operating head 10. An internal pipe 24, communicating with the valve 3 20, is welded to the inner wall of the top of the operating head 10. A valve 4 25 is fixed to the side of the operating head 10. A connecting pipe 2 9 is bolted to the top of the valve 3 20. A delivery pump 8 is bolted to the end of the connecting pipe 2 9 away from the valve 3 20. A drilling mud treatment assembly, communicating with the mud tank 2, is connected to the end of the delivery pump 8 away from the connecting pipe 2 9. A delivery pump 2 21 is bolted to one end of the valve 4 25. A connecting pipe 3 11 is bolted to one end of the delivery pump 21, and the connecting pipe 3 11 communicates with the mud tank 2.

[0027] During drilling, the drill pipe 22 and the operating head 10 are connected by a rotary joint 23, allowing the drill pipe 22 to be rotated for drilling operations. The drill pipe 22 is a multi-section connection and fixed, and the drill bit 9 (not shown) is installed at the bottom of the drill pipe 22. The drill pipe 22 needs to be used in conjunction with drilling mud during the drilling process. The drilling mud can be stored in the mud tank 2. When the second delivery pump 21 is started and the fourth valve 25 is opened, the drilling mud is pumped from the mud tank 2 through the third connecting pipe 11. The pumped drilling mud is transported to the inside of the operating head 10 through the third connecting pipe 11. Finally, the drilling mud is discharged from the bottom of the drill bit through the drill pipe 22 and enters the well wall.

[0028] When drilling mud needs to be recycled and processed for subsequent reuse and backfilling into the drill pipe 22, when the delivery pump 8 is started, a pressure difference is created between the inside of the drill pipe 22 and the well wall. Valve 3 20 is opened, valve 4 25 is closed, and delivery pump 2 21 is not working. Delivery pump 8 draws the drilling mud from the well into the drill pipe 22. The drilling mud enters the connecting pipe 2 9 through the drill pipe 22 and the built-in pipe 24. Finally, after being processed by the drilling mud treatment component, it flows back into the mud pool 2, realizing the recycling of drilling mud. When it is necessary to backfill the drilling mud into the operating head 10, delivery pump 2 21 is started, valve 3 20 is closed, valve 4 25 is opened, and delivery pump 8 is not working, thereby realizing the backfilling of drilling mud.

[0029] The drilling mud treatment assembly includes a desanding mechanism and a performance adjustment mechanism. The desanding mechanism includes a discharge pipe 5, a hydrocyclone 6, and an inlet pipe 7. The hydrocyclone 6 is fixed to the top outer wall of the mounting platform 1 by a bracket. The inlet pipe 7 and the discharge pipe 5 are respectively welded to the side wall of the hydrocyclone 6 and the top outer wall of the hydrocyclone 6. The inlet pipe 7 and the delivery pump 8 are fixedly connected by bolts.

[0030] When desanding of drilling mud is required, the drilling mud is transported to the inlet pipe 7 through the connecting pipe 9 using the delivery pump 8. The drilling mud enters the hydrocyclone 6 through the inlet pipe 7 and enters the hydrocyclone 6 tangentially under pressure, forming a high-speed rotating flow field. The denser sand particles are thrown against the wall of the hydrocyclone under the action of centrifugal force and slide down the cone to the bottom outlet of the hydrocyclone 6 for discharge, while the less dense mud gathers towards the center to form an upward internal vortex and is discharged through the discharge pipe 5, thereby achieving solid-liquid separation.

[0031] The performance adjustment mechanism includes a mixing cylinder 3 and an intermediate pipe 12. The mixing cylinder 3 is fixed to the top outer wall of the mounting platform 1. The intermediate pipe 12 is welded to the top outer wall of the mixing cylinder 3, and the intermediate pipe 12 and the discharge pipe 5 are fixedly connected by a connecting pipe 4. A valve 13 is fixed to the top outer wall of the mixing cylinder 3 by bolts. A hopper 14 is fixed to the top of the valve 13. A drive motor 15 is fixed to the top outer wall of the mixing cylinder 3 by bolts. The output end of the drive motor 15 is connected to an agitator 16 through a coupling. Agitator blades 17 are welded to the outer wall of the agitator 16.

[0032] The desanded drilling mud can be fed into the mixing cylinder 3 through the intermediate pipe 12 via the connecting pipe 4. When the valve 13 is opened, a certain amount of proportioned bentonite, filtration loss reducer, thickener and other performance adjustment materials can be injected into the mixing cylinder 3 through the hopper 14 to adjust the density, viscosity, shear force and other parameters of the drilling mud, so as to improve the subsequent use effect of the drilling mud. When the drive motor 15 drives the stirring rod 16 and stirring blade 17 to rotate, the performance adjustment materials are stirred and mixed to ensure their uniformity.

[0033] The bottom outer wall of the mixing cylinder 3 is fixed with a valve 2 18 by bolts, and the bottom outer wall of the valve 2 18 is fixed with a connecting pipe 4 19 by bolts.

[0034] When valve 218 is opened, the performance adjustment material that is fully mixed in mixing cylinder 3 is discharged into mud tank 2 through connecting pipe 419.

[0035] Working principle: During drilling, the drill pipe 22 is connected to the operating head 10 via the rotary joint 23 for rotary drilling. The second delivery pump 21 is started to transport the drilling mud in the mud pit 2 to the operating head 10 through the third connecting pipe 11, and then it is discharged from the drill bit through the drill pipe 22 into the well wall. During recovery, the first delivery pump 8 is started to create a pressure difference between the inside of the drill pipe 22 and the well wall, which draws the mud into the drill pipe 22. The mud then enters the drilling mud treatment component through the internal pipe 24 and the second connecting pipe 9. The first delivery pump 8 first pumps the mud through the well wall. The slurry is fed into the hydrocyclone 6 through the inlet pipe 7. Under the action of centrifugal force, solid-liquid separation is achieved. The sand particles are discharged from the bottom outlet, and the slurry is discharged through the discharge pipe 5. After the sand is removed, the slurry enters the mixing cylinder 3 through the connecting pipe 1 4 and the intermediate pipe 12. The performance adjustment material is injected from the hopper 14 by opening the valve 13. The drive motor 15 drives the stirring rod 16 and the stirring blade 17 to stir and mix. Finally, the valve 2 18 is opened so that the mixed slurry flows back to the slurry tank 2 through the connecting pipe 4 19 for reuse.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A back-priming device based on the reuse of drilling mud, comprising a mounting table (1), an operating head (10) and a drill rod (22), characterized in that, The operating head (10) and the drill pipe (22) are connected by a rotary joint (23). A valve three (20) is fixed on the top of the operating head (10). An internal pipe (24) communicating with the valve three (20) is welded to the inner wall of the top of the operating head (10). A valve four (25) is welded to the side of the operating head (10). A connecting pipe two (9) is fixed on the top of the valve three (20). A delivery pump one (8) is fixed at one end of the connecting pipe two (9). A drilling mud treatment component is connected to one end of the delivery pump one (8).

2. The reverse circulation device based on the reuse of drilling mud according to claim 1, characterized in that, The drilling mud treatment assembly includes a desanding mechanism and a performance adjustment mechanism. The desanding mechanism includes a discharge pipe (5), a hydrocyclone (6), and an inlet pipe (7). The hydrocyclone (6) is fixed to the top outer wall of the mounting platform (1) by a bracket. The inlet pipe (7) and the discharge pipe (5) are respectively welded to the side wall of the hydrocyclone (6) and the top outer wall of the hydrocyclone (6). The inlet pipe (7) and the delivery pump (8) are fixedly connected.

3. The reverse circulation device based on the reuse of drilling mud according to claim 2, characterized in that, The performance adjustment mechanism includes a mixing cylinder (3) and an intermediate pipe (12). The mixing cylinder (3) is fixed to the top outer wall of the mounting platform (1), and the intermediate pipe (12) is welded to the top outer wall of the mixing cylinder (3). The intermediate pipe (12) and the discharge pipe (5) are fixedly connected by a connecting pipe (4).

4. The reverse circulation device based on the reuse of drilling mud according to claim 3, characterized in that, A valve (13) is fixed to the top outer wall of the mixing cylinder (3), and a hopper (14) is fixed to the top of the valve (13).

5. The reverse circulation device based on the reuse of drilling mud according to claim 4, characterized in that, A drive motor (15) is fixed to the top outer wall of the mixing cylinder (3). The output end of the drive motor (15) is connected to a stirring rod (16) through a coupling. A stirring blade (17) is welded to the outer wall of the stirring rod (16).

6. The reverse circulation device based on the reuse of drilling mud according to claim 5, characterized in that, A valve 2 (18) is fixed to the bottom outer wall of the mixing cylinder (3), and a connecting pipe 4 (19) is fixed to the bottom outer wall of the valve 2 (18).

7. The reverse circulation device based on the reuse of drilling mud according to claim 1, characterized in that, The mounting platform (1) is equipped with a mud tank (2) inside, and the connecting pipe (19) is connected to the mud tank (2).

8. The reverse circulation device based on the reuse of drilling mud according to claim 7, characterized in that, One end of the valve four (25) is fixed with a second conveying pump (21), and one end of the second conveying pump (21) is fixed with a third connecting pipe (11). The third connecting pipe (11) is connected to the mud tank (2).

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