Slurry non-landing system for purifying and circulating drilling fluid and small integrated device

Abstract

The utility model discloses a slurry non-landing system for purifying and circulating drilling fluid and a small integrated device, and relates to the technical field of geological drilling, the system comprises a sand settling bin, a purifying bin and a circulating bin which are sequentially communicated through overflow ports; an inlet of the vibrating screen is communicated with drilling fluid discharged from a wellhead, and a liquid phase outlet of the vibrating screen corresponds to the inlet of the sand setting bin; a liquid phase outlet of the sand settling bin is connected with the sand and mud removal all-in-one machine; the purification bin is communicated with a liquid phase outlet of the sand and mud removal all-in-one machine, and a bottom liquid phase outlet of the purification bin is connected with the centrifugal machine; the circulating bin is communicated with a liquid phase outlet of the centrifugal machine. The mud non-landing system for purifying and circulating the drilling fluid is integrated and skid-mounted on a mud tank base, the sand settling bin, the purifying bin and the circulating bin are combined to form an integrated mud tank structure, and the vibrating screen, the sand and mud removing all-in-one machine and the centrifugal machine are all mounted and arranged on the top surface of the mud tank structure. According to the utility model, efficient cyclic utilization and miniaturized integration of slurry are met.

Description

Technical Field

[0001] This utility model relates to the field of geological drilling technology, and more specifically to a drilling fluid purification and circulation mud non-landing system and a small integrated device. Background Technology

[0002] In the drilling field, mud treatment is an indispensable part of drilling operations. Mud not only carries cuttings, cools drill bits, and lubricates drill tools, but also significantly impacts drilling efficiency and safety. Traditional mud treatment systems mainly include equipment such as mud tanks, vibrating screens, and centrifuges. These devices typically operate independently, requiring considerable space for arrangement, and their treatment efficiency and effectiveness vary considerably. Existing mud treatment systems mainly suffer from the following problems:

[0003] 1. Low processing efficiency: Traditional mud treatment systems have low processing efficiency due to independent equipment operation, which cannot meet the needs of rapid drilling.

[0004] 2. Severe environmental pollution: Traditional mud treatment is mostly open, resulting in a large amount of mud being directly discharged into the environment, causing serious environmental pollution.

[0005] 3. Large equipment size: Traditional mud treatment equipment is large in size, which is not conducive to the relocation and installation of well teams, increasing the complexity and cost of operations.

[0006] 4. Complex operation: Because the equipment operates independently, the operation process is complex and requires more manual intervention, which reduces work efficiency.

[0007] 5. Poor adaptability: Traditional systems are difficult to adapt to different drilling environments and process requirements, and lack flexibility.

[0008] 6. Insufficient safety performance: Due to the dispersed nature of the equipment, there are potential safety hazards during operation, which does not meet the safety requirements of modern drilling operations.

[0009] In summary, existing technologies for mud treatment have numerous problems, which not only affect the efficiency and safety of drilling operations but also have adverse environmental impacts. Therefore, developing a novel, small-scale, integrated, non-landing mud recycling system to address these issues is a pressing problem for those skilled in the art. Utility Model Content

[0010] In view of this, the present invention provides a drilling fluid purification and circulation mud non-landing system and a small integrated device, which aims to solve the problems of low mud treatment efficiency, serious environmental pollution and large equipment space occupation in traditional drilling processes, and realize efficient recycling and miniaturized integration of mud.

[0011] To achieve the above objectives, the present invention adopts the following technical solution:

[0012] A drilling fluid purification and circulation mud-free system includes: a settling chamber, a purification chamber, and a circulation chamber connected in sequence through an overflow port;

[0013] A vibrating screen is installed at the inlet of the settling chamber. The inlet of the vibrating screen is connected to the drilling fluid discharged from the wellhead, and the liquid phase outlet of the vibrating screen corresponds to the inlet of the settling chamber. The liquid phase outlet of the settling chamber is connected to an integrated sand and mud removal machine.

[0014] The purification chamber is connected to the liquid phase outlet of the integrated sand and mud removal machine, and the bottom liquid phase outlet of the purification chamber is connected to a centrifuge.

[0015] The circulation chamber is connected to the liquid phase outlet of the centrifuge.

[0016] Through the above technical solution, this utility model can achieve multi-stage desanding and purification of drilling fluid. The mud is filtered between the settling chamber, purification chamber, and circulation chamber. Furthermore, in conjunction with a vibrating screen, an integrated desanding and mud removal machine, and a centrifuge for desanding, the mud achieves overall circulation without spilling onto the ground. This meets various process requirements for the storage, preparation, circulation, and purification of drilling fluid in geological drilling boreholes. It can effectively remove harmful solid phases from drilling fluid while retaining useful solid phases, providing high-quality drilling fluid for drilling operations.

[0017] Preferably, in the above-mentioned drilling fluid purification and circulation mud non-landing system, the purification chamber and the circulation chamber are respectively connected to the suction port of the mud pump through the mud pump suction pipe, and the pump outlet of the mud pump is connected to the wellhead through a pipeline.

[0018] Preferably, in the above-mentioned drilling fluid purification and circulation mud-free system, the liquid phase outlet of the sedimentation chamber is connected to the desanding and desilting integrated machine via a screw pump.

[0019] Preferably, in the above-mentioned drilling fluid purification and circulation mud-free system, both the purification chamber and the circulation chamber are equipped with agitators.

[0020] Preferably, in the above-mentioned drilling fluid purification and circulation mud-free system, an ultrasonic level gauge is installed in the purification chamber.

[0021] Preferably, in the above-mentioned drilling fluid purification and circulation mud-free system, the bottom liquid phase outlet of the purification chamber is connected to a centrifuge via a liquid supply pump.

[0022] It should be noted that the liquid supply pump can be any type of pump capable of supplying fluid, such as a vertical submersible pump. Since the centrifuge itself operates under centrifugal pressure, an additional liquid supply pump is not required. In contrast, the screw pump needs to provide the necessary pressure to the subsequent integrated sand and sludge removal machine to meet its operational requirements. The screw pump has a pressure of 0.6 MPa, a power of 4 kW, and a flow rate of 12 m³ / h. 3 / h.

[0023] Preferably, in the above-mentioned drilling fluid purification and circulation mud-free system, the overflow height of the sedimentation chamber and the purification chamber is higher than the overflow height between the purification chamber and the circulation chamber.

[0024] This utility model also provides a small integrated device for drilling fluid purification and circulation, which integrates the above-mentioned drilling fluid purification and circulation mud non-landing system and skids it on the mud tank base. The sand settling chamber, the purification chamber and the circulation chamber are combined to form an integrated mud tank structure. The vibrating screen, the desanding and mud removal integrated machine and the centrifuge are all installed on the top surface of the mud tank structure.

[0025] Through the above technical solution, this utility model integrates the drilling fluid purification and circulation mud non-landing system into a skid-mounted system on the mud tank base. The overall system design conforms to the drilling rig layout, overall design requirements and standard drilling fluid treatment process.

[0026] Preferably, in the above-mentioned small integrated device for drilling fluid purification and circulation, a walkway is fixed to one side wall of the mud tank structure by a support frame. The walkway is located at the top edge of the mud tank structure, and a ladder is fixed to one end of the walkway.

[0027] Preferably, in the above-mentioned small integrated device for drilling fluid purification and circulation, a controller is installed on one side wall of the mud tank structure.

[0028] As can be seen from the above technical solution, compared with the prior art, this utility model discloses a drilling fluid purification and circulation mud non-landing system and a small integrated device, which has the following beneficial effects:

[0029] 1. Improved processing efficiency: Through integrated system design, the efficiency of mud processing has been improved, meeting the needs of rapid drilling.

[0030] 2. Reduce environmental pollution: It realizes the recycling of mud without it touching the ground, reducing the direct discharge of mud into the environment and reducing environmental pollution.

[0031] 3. Miniaturized and integrated equipment: By integrating multiple processing units onto a single skid-mounted mud tank base, the space occupied by the equipment is reduced, making it easier to relocate and install.

[0032] 4. Simplified operation process: The integrated design reduces manual intervention, simplifies the operation process, and improves work efficiency.

[0033] 5. Improved adaptability: The new system can adapt to different drilling environments and process requirements, thus improving the system's flexibility.

[0034] 6. Improved safety performance: Due to the integration of equipment, safety hazards during operation are reduced, which is more in line with the safety requirements of modern drilling operations.

[0035] 7. Optimize the process flow: The overall system design conforms to the drilling rig layout, overall design requirements and standard drilling fluid treatment process flow.

[0036] 8. Easy to transport and relocate: The device is suitable for road and rail transport, meets the requirements for crane loading and unloading, and can be towed short distances within the well site.

[0037] 9. Corrosion resistance and environmental resistance: The tank body, railings, and walkway panels are sandblasted and treated with anti-corrosion measures to adapt to harsh working environments.

[0038] 10. Improve equipment stability and reliability: By coordinating the control of all parts of the overall structure through the PLC electrical control system, the stability and reliability of the equipment are improved. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0040] Figure 1 The attached figure is a schematic diagram of the drilling fluid purification and circulation mud-free system provided by this utility model;

[0041] Figure 2 The attached figure is a top view of the small integrated device for drilling fluid purification and circulation provided by this utility model;

[0042] Figure 3 The attached figure is a front view of the small integrated device for drilling fluid purification and circulation provided by this utility model;

[0043] Figure 4 The attached figure is a left view of the small integrated device for drilling fluid purification and circulation provided by this utility model;

[0044] Figure 5The attached figure is a right view of the small integrated device for drilling fluid purification and circulation provided by this utility model.

[0045] in:

[0046] 1-Settling chamber; 2-Purification chamber; 3-Circulation chamber; 4-Vibrating screen; 5-Wellhead; 6-Integrated sand and mud removal machine; 7-Centrifuge; 8-Mud pump; 9-Screw pump; 10-Agitator; 11-Ultrasonic level gauge; 12-Supply pump; 13-Mud tank base; 14-Support frame; 15-Walkway; 16-Ladder; 17-Controller; 18-Mulch guide branch. Detailed Implementation

[0047] 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.

[0048] Example 1:

[0049] See appendix Figure 1 This utility model discloses a drilling fluid purification and circulation mud non-landing system, including: a sand settling chamber 1, a purification chamber 2 and a circulation chamber 3 connected in sequence through an overflow port;

[0050] A vibrating screen 4 is installed at the inlet of the sedimentation chamber 1. The inlet of the vibrating screen 4 is connected to the drilling fluid discharged from the wellhead 5. The liquid phase outlet of the vibrating screen 4 corresponds to the inlet of the sedimentation chamber 1. The liquid phase outlet of the sedimentation chamber 1 is connected to the desanding and desilting integrated machine 6.

[0051] The purification chamber 2 is connected to the liquid phase outlet of the sand and mud removal integrated machine 6, and the bottom liquid phase outlet of the purification chamber 2 is connected to the centrifuge 7.

[0052] The circulation chamber 3 is connected to the liquid phase outlet of the centrifuge 7.

[0053] To further optimize the above technical solution, the purification chamber 2 and the circulation chamber 3 are respectively connected to the suction port of the mud pump 8 through the mud pump suction pipe. The pump outlet of the mud pump 8 is connected to the wellhead 5 through a pipeline. The mud pump suction pipe can be controlled by the seabed valve to suck into the purification chamber or the circulation chamber.

[0054] To further optimize the above technical solution, the liquid phase outlet of the sedimentation tank 1 is connected to the integrated sand and mud removal machine 6 via a screw pump 9.

[0055] like Figure 1As shown, in this embodiment, the screw pump 9 and the desanding and desilting machine 6 are connected by a tee to a slurry guide branch 18. Solenoid valves are installed on both the branch connecting the desanding and desilting machine 6 and the slurry guide branch 18. By setting the slurry guide branch 18, it is beneficial to guide the slurry to the sedimentation chamber 1, which can quickly introduce the drilling fluid in the sedimentation chamber 1 into the purification chamber 2, and facilitate the cleaning of the sedimentation chamber 1.

[0056] To further optimize the above technical solution, both the purification chamber 2 and the circulation chamber 3 are equipped with a stirrer 10, which adopts a single-layer impeller.

[0057] To further optimize the above technical solution, an ultrasonic level gauge 11 is installed inside the purification chamber 2.

[0058] To further optimize the above technical solution, the bottom liquid phase outlet of the purification chamber 2 is connected to the centrifuge 7 via the liquid supply pump 12.

[0059] To further optimize the above technical solution, the overflow height of the sedimentation chamber 1 and the purification chamber 2 is higher than the overflow height between the purification chamber 2 and the circulation chamber 3.

[0060] Example 2:

[0061] See appendix Figure 2 To be continued Figure 5 This utility model embodiment discloses a small integrated device for drilling fluid purification and circulation. The drilling fluid purification and circulation mud non-landing system of embodiment 1 is integrated and skid-mounted on the mud tank base 13. The sand settling chamber 1, purification chamber 2 and circulation chamber 3 are combined to form an integrated mud tank structure. The vibrating screen 4, the sand and mud removal integrated machine 6 and the centrifuge 7 are all installed on the top surface of the mud tank structure.

[0062] The tank is not equipped with a mud trough, but uses an overflow hole with dimensions of 300×200mm (width×height).

[0063] To further optimize the above technical solution, a walkway 15 is fixed to one side wall of the mud tank structure via a support frame 14. The walkway 15 is located at the top edge of the mud tank structure, and a ladder 16 is fixed to one end of the walkway 15. The walkway 15 is made of anti-slip serrated steel grating (G325 / 30 / 100SG), and the lower part of the walkway 15 is reinforced with 50×4 square tubing. The walkway 15 is welded to the tank body as a whole and does not need to be removed during transportation and relocation.

[0064] To further optimize the above technical solution, a controller 17 is installed on one side wall of the mud tank structure.

[0065] The device provided in this embodiment can operate normally under ambient temperatures ranging from -19°C to +45°C and humidity ≤90% (+20°C); it is suitable for road and rail transportation, meets the requirements for crane loading and unloading, and can be towed short distances within the well site.

[0066] In this embodiment, the device dimensions are 6000×2000×1200mm. The mud tank structure is constructed from corrugated steel plates and welded steel sections, with the bottom plate using a 12# channel steel boat-shaped structure. The tank sides are made of 6mm / Q235 steel plates pressed into corrugated steel plates, the mud tank base is made of 8mm / Q235 flat steel plates, and the tank surface is made of patterned steel plates. A ladder and personnel entrance / exit are provided. The tank is surrounded by railings made of square steel tubing, featuring an unobstructed, foldable structure that is securely fixed. The railings are secured with clamps to maintain straightness and are equipped with kickboards. The tank, railings, and walkway are sandblasted and treated for corrosion protection. The tank undergoes a sealing test. The device also includes pipelines and valves between the equipment and the tank. A D50 electric valve is installed at the mud pump inlet.

[0067] The details of each warehouse and its equipment are shown in the table below:

[0068]

[0069] In this embodiment, solenoid valves are installed at each connecting pipeline as needed, which will not be described in detail here. Figure 1 As shown in the diagram. In this embodiment, the controller 17 adopts a PLC electrical control system to coordinate the control of all parts of the overall structure. In actual use, a Siemens S71200 PLC can be selected to collect the status of field devices, sensor instruments, and valve components, and transmit the data to the system via Modbus TCP / Profinet communication through a network cable. It also supports remote control, which can be achieved by connecting to a remote control system through a network cable.

[0070] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0071] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A drilling fluid purification and circulation mud-free system, characterized in that, include: The sedimentation chamber (1), purification chamber (2) and circulation chamber (3) are connected in sequence through the overflow outlet; A vibrating screen (4) is installed at the inlet of the sedimentation tank (1). The inlet of the vibrating screen (4) is connected to the drilling fluid discharged from the wellhead (5). The liquid phase outlet of the vibrating screen (4) corresponds to the inlet of the sedimentation tank (1). The liquid phase outlet of the sedimentation tank (1) is connected to the desanding and mud removal integrated machine (6). The purification chamber (2) is connected to the liquid phase outlet of the sand and mud removal integrated machine (6), and the bottom liquid phase outlet of the purification chamber (2) is connected to the centrifuge (7). The circulation chamber (3) is connected to the liquid phase outlet of the centrifuge (7).

2. The drilling fluid purification and circulation mud-free system according to claim 1, characterized in that, The purification chamber (2) and the circulation chamber (3) are respectively connected to the suction port of the mud pump (8) through the mud pump suction pipe, and the pump outlet of the mud pump (8) is connected to the wellhead (5) through the pipeline.

3. The drilling fluid purification and circulation mud-free system according to claim 1, characterized in that, The liquid phase outlet of the sedimentation tank (1) is connected to the integrated sand and mud removal machine (6) via a screw pump (9).

4. The drilling fluid purification and circulation mud-free system according to claim 1, characterized in that, Both the purification chamber (2) and the circulation chamber (3) are equipped with a stirrer (10).

5. The drilling fluid purification and circulation mud-free system according to claim 1, characterized in that, An ultrasonic level gauge (11) is installed inside the purification chamber (2).

6. The drilling fluid purification and circulation mud-free system according to claim 1, characterized in that, The bottom liquid phase outlet of the purification chamber (2) is connected to a centrifuge (7) via a liquid supply pump (12).

7. The drilling fluid purification and circulation mud-free system according to claim 1, characterized in that, The overflow height of the sedimentation chamber (1) and the purification chamber (2) is higher than the overflow height between the purification chamber (2) and the circulation chamber (3).

8. A small integrated device for drilling fluid purification and circulation, characterized in that, The drilling fluid purification and circulation mud non-landing system according to any one of claims 1-7 is integrated and skid-mounted on the mud tank base (13). The sand settling chamber (1), the purification chamber (2) and the circulation chamber (3) are combined to form an integrated mud tank structure. The vibrating screen (4), the desanding and mud removal integrated machine (6) and the centrifuge (7) are all installed on the top surface of the mud tank structure.

9. A small integrated device for drilling fluid purification and circulation according to claim 8, characterized in that, A walkway (15) is fixed to one side wall of the mud tank structure via a support frame (14). The walkway (15) is located at the top edge of the mud tank structure, and a ladder (16) is fixed to one end of the walkway (15).

10. A small integrated device for drilling fluid purification and circulation according to claim 8, characterized in that, A controller (17) is installed on one side wall of the mud tank structure.

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