Rapid mixing device for sealing agent

Abstract

This utility model discloses a rapid mixing device for plugging agents, including an intake tank, a preparation tank, a liquid height enhancement module, an open-type dosing module, and a self-mixing pipeline. The self-mixing pipeline has an inlet port, an outlet port, and a dosing port. The inlet port is connected to the outlet of the liquid height enhancement module, the outlet port is connected to the preparation tank, and the dosing port is connected to the open-type dosing module. The inlet of the liquid height enhancement module is located inside the intake tank. This utility model can rapidly add plugging materials such as acid-soluble agents, walnut shells, fracture plugging agents, and high-fluid-loss agents. When downhole leakage occurs, it can quickly mix the plugging agent to seal fractures or leaks, prevent the loss of mud and drilling fluid, and ensure the smooth progress of drilling operations.

Description

Technical Field

[0001] This utility model relates to the field of oil drilling technology, specifically to a rapid mixing device for plugging agents. Background Technology

[0002] Drilling well leakage is one of the most common problems in drilling engineering. The main hazards it causes include: increased drilling fluid costs, prolonged construction period, stuck pipe, well collapse, blowout, partial or complete well abandonment, impact on the accuracy of geological data, damage to the target formation, formation contamination, increased use of kill fluid, environmental pollution, and impact on human health. When well leakage occurs, it is crucial to immediately analyze the type and cause of the leakage, take measures such as adjusting the drilling fluid density, determining the location of the leakage formation, immediately carrying out plugging operations, and maintaining the necessary fluid column pressure.

[0003] Preparing the sealing agent is a challenge, as crack-induced leakage can occur, resulting in a loss of 20-100m³. 3 When the flow rate drops to / h, or even when the flow rate drops back to normal, a higher concentration of sealing agent (10%-53%) is required, with larger particles (3-8 mm). Construction cement may be added for sealing. The main sealing materials include plant cellulose, lignin, walnut shells (1-8 mm), silicate fiber, consolidating agents, and high-water-loss agents. As the concentration of the sealing slurry increases, the weighting pump becomes less efficient. Due to the influence of the flow cross-sectional area, the built-in pipelines, nozzles, and weighting funnel are prone to clogging.

[0004] Currently, the circulating tank for increasing the density of drilling fluid mainly consists of a 90KW explosion-proof motor, a check valve, nozzles, a weighting funnel, and circulation pipelines, achieving a weighting density as high as 2.8g / cm³. 3 The volume of the heavy-duty cubic meter is 140m. 3 The process of handling leaks at a rate of / h is time-consuming and labor-intensive, severely impacting production progress. Adding the plugging material directly to the circulating tank surface results in uneven mixing of the material and mud, causing clumps to float on the surface and uneven concentration. This leads to blockages in water supply lines, drill string water holes, and valve shims during pumping, resulting in extremely poor drilling pump water supply efficiency. This disrupts continuous operation, posing significant risks to downhole safety. Surface equipment cannot operate continuously, and failure to promptly clear blocked channels creates a vicious cycle. The inability to inject the plugging agent into the well in a timely manner greatly increases the difficulty of downhole well control. Completing the plugging requires a large amount of labor, delays production, and compromises construction safety.

[0005] Announcement No. CN216341988U discloses a weighted slurry mixing device, including a base plate, a crane platform fixedly installed at the top of the base plate, a crane base fixedly installed at the top of the crane platform, a crane body fixedly installed at the top of the crane base, support arms fixedly installed on both sides of the crane platform, and two weighted funnels fixedly installed at the top of the base plate. Each weighted funnel has a discharge port and a feed port at its bottom. A first connecting pipe is fixedly installed at one end of each discharge port, and a second connecting pipe is fixedly installed at one end of each feed port. A bracket is placed at the bottom of each second connecting pipe, and a third connecting pipe is fixedly connected to one end of each first connecting pipe. A sand pump is installed on one side of each third connecting pipe.

[0006] Announcement No.: CN208150953U discloses a diversion compensation weighted funnel for drilling fluid production, including a weighted funnel, a conducting butterfly valve, a mixing cylinder cavity, a jet pipe, and a support base. A diversion buffer box is set on the platform of the support frame. The pumping input pipe extends vertically downward into the inner cavity of the drilling fluid jet pipe. A jet nozzle is set at the end of the delivery hose. A cam is installed on the output shaft of the power drive motor. A lifting drive rod is set directly below the output shaft of the power drive motor. A fixed pulley is installed at the top of the lifting drive rod. The top edge of the fixed pulley is adapted to abut against the bottom edge of the cam. An elastic return spring is also sleeved on the outside of the lifting drive rod.

[0007] Announcement No. CN213010337U discloses a barite powder weighting and circulation device, including a top rail, a frame, a bottom rail, and a conveying cylinder. The top rail is fixedly installed on both sides of the inner top of the frame. A support column is fixedly installed on the surface of the top rail. A material hopper is fixedly installed on the top of the support column. A corrugated pipe is connected to the bottom of the material hopper. One end of the corrugated pipe is connected to the top of the outer surface of the conveying cylinder. One end of the conveying cylinder is rotatably installed inside a first shaft seat, and the first shaft seat is fixedly installed on the surface of the top rail. The output end of a hydraulic cylinder is rotatably connected to the bottom of the outer surface of the conveying cylinder. One end of the hydraulic cylinder is rotatably installed inside a second shaft seat.

[0008] The aforementioned existing technologies suffer from the technical problem of low mixing efficiency.

[0009] In summary, the technical solutions, technical problems to be solved, and beneficial effects of the above-disclosed technologies are all different from those of this utility model. For more technical features, technical problems to be solved, and beneficial effects of this utility model, the above-disclosed technical documents do not provide any technical inspiration. Utility Model Content

[0010] In view of the above-mentioned defects in the existing technology, the purpose of this utility model is to provide a rapid mixing device for sealing agents.

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

[0012] A rapid mixing device for sealing agents includes an inhalation tank, a preparation tank, a liquid height enhancement module, an open dosing module, and a self-mixing pipeline. The self-mixing pipeline is equipped with an inlet port, an outlet port, and a drug inlet port. The inlet port is connected to the outlet of the liquid height enhancement module, the outlet port is connected to the preparation tank, and the drug inlet port is connected to the open dosing module. The inlet of the liquid height enhancement module is located inside the inhalation tank.

[0013] Furthermore, the liquid height lifting module includes a screw pump;

[0014] Specifically, the screw pump includes a drive unit, a transmission shaft, helical blades, and a suction pipe;

[0015] Specifically, the spiral blades are disposed in the suction tube, the output end of the drive device is connected to the upper port of the suction tube, the output shaft of the drive device is fixedly connected to the spiral blades through a transmission shaft, and the suction tube has a liquid outlet above the spiral blades.

[0016] Furthermore, the open-type dosing module includes a mixing funnel, the bottom of which is located above the outlet of the screw pump and within the head of the screw pump.

[0017] Furthermore, a partition plate is provided inside the mixing funnel.

[0018] Furthermore, the self-mixing pipeline includes a tee, the inlet port of which is connected to the outlet of the screw pump via a supply pipeline, the outlet port of which is connected to the mixing tank via a discharge pipeline, and the inlet port of which is connected to the bottom of the mixing funnel.

[0019] Furthermore, the liquid supply line is a flexible hose.

[0020] Furthermore, the discharge pipeline is a rigid steel pipe, a flow divider is installed inside the discharge pipeline, a discharge pipeline elbow is installed at the end of the discharge pipeline, and the outlet of the discharge pipeline elbow is suspended inside the configuration tank.

[0021] Furthermore, the discharge pipeline bend is a 120° bend.

[0022] Furthermore, the diversion baffle has a triangular cross-section with the pointed corner facing the tee, and the diversion baffle is distributed in a series of rhomboid arrays.

[0023] Furthermore, the diversion baffle is perpendicular to the ground.

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] 1. This utility model can quickly add acid-soluble, walnut shell, fracture plugging agent, high-water-loss and other plugging materials. When leakage occurs downhole, it can quickly mix the plugging agent to seal the cracks or leaks, prevent the loss of mud and drilling fluid, and ensure the smooth progress of drilling operations.

[0026] 2. This utility model has the advantages of improving the sealing effect, enhancing the stability of the sealing layer, reducing material waste, reducing the time for preparing the sealing agent, and improving work efficiency.

[0027] 3. The rapid mixing of this invention reduces drilling fluid loss and lowers operational risks; it also quickly and effectively addresses well leakage problems, reducing operational delays and additional costs caused by leakage, thus further improving economic efficiency. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the rapid mixing device for sealing agent of this utility model;

[0029] Figure 2 This is a schematic diagram showing the distribution of the diversion baffles inside the discharge pipeline in this utility model.

[0030] In the diagram: 1. Liquid supply pump; 2. Suction tank; 3. Liquid supply pipeline; 4. Mixing funnel; 5. Diversion baffle 10; 6. Discharge pipeline; 7. Discharge pipeline elbow; 8. Inlet pipe; 9. Feeding platform; 10. Diversion baffle; → indicates the direction of drilling fluid flow. Detailed Implementation

[0031] 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.

[0032] Example 1:

[0033] Please see Figure 1 The rapid mixing device for sealing agents provided by this utility model includes an inhalation tank 2, a preparation tank 8, a liquid height enhancement module, an open dosing module, and a self-mixing pipeline for the liquid solution. The self-mixing pipeline for the liquid solution is provided with an inlet port, an outlet port, and a drug inlet port. The inlet port is connected to the outlet of the liquid height enhancement module, the outlet port is connected to the preparation tank 8, and the drug inlet port is connected to the open dosing module. The inlet of the liquid height enhancement module is located inside the inhalation tank 2.

[0034] Furthermore, the liquid height lifting module includes a screw pump 1, which includes a drive device, a transmission shaft, helical blades, and a suction pipe. The helical blades are disposed in the suction pipe. The output end of the drive device is connected to the upper port of the suction pipe. The output shaft of the drive device is fixedly connected to the helical blades through the transmission shaft. The suction pipe has a liquid outlet above the helical blades. In use, the drilling fluid level in the suction tank 2 is maintained so that the lower port of the suction pipe is below the liquid level. The rotation of the helical blades generates negative pressure to lift the liquid.

[0035] The reason for using screw pump 1 is that some impurities may not be completely filtered out in the circulating drilling fluid. Screw pump 1 has a wide flow channel, so the impurities have less impact on the pump's operation. Furthermore, since an open dosing module is used subsequently, the liquid needs to flow by gravity. Screw pump 1 has good control performance and uniform flow. After raising the liquid level to the gravity flow height, the liquid can flow by gravity through the open dosing module.

[0036] Furthermore, the open dosing module includes a mixing funnel 4, the bottom of which is located above the outlet of the screw pump 1, and the top of the mixing funnel 4 is within the head of the screw pump 1. The upper end of the mixing funnel 4 is the feeding platform.

[0037] The mixing funnel 4 is equipped with a divider plate for adding different reagents.

[0038] Furthermore, the self-mixing pipeline includes a tee 5, the inlet port of the tee 5 is connected to the outlet port of the screw pump 1 through the supply pipeline 3, the outlet port of the tee 5 is connected to the preparation tank 9 through the discharge pipeline 6, and the inlet port of the tee 5 is connected to the bottom of the mixing funnel 4.

[0039] The tee 5 is connected to the mixing funnel 4 via a union joint, the tee 5 is connected to the liquid supply line 3 via a union joint, and the tee 5 is connected to the discharge line 6 via a flange joint.

[0040] Among them, the liquid supply line 3 is a flexible hose, which facilitates the adjustment of the position of the mixing funnel 4 and the tee 5 to form a height difference.

[0041] The discharge pipeline 6 is a rigid steel pipe. A diversion baffle 10 is installed inside the discharge pipeline 6. A discharge pipeline elbow 7 is installed at the end of the discharge pipeline 6. The outlet of the discharge pipeline elbow 7 is suspended inside the configuration tank 8.

[0042] Furthermore, an air line interface is machined above the discharge pipeline 6. The air line interface is connected to the air line to utilize the air source so that the liquid can be more quickly and fully mixed at the diversion baffle 10.

[0043] Specifically, the diversion baffle 10 has a triangular cross-section with the pointed corner facing the tee 5, so that the resistance of the diversion baffle 10 to the mixture is minimized. The diversion baffle 10 is distributed in a series of prismatic arrays to enhance the diversion and mixing effect. The angle between the diversion baffle 10 and the ground can be any angle. Most preferably, the diversion baffle 10 is perpendicular to the ground.

[0044] Specifically, the discharge pipeline elbow 7 is a 120° elbow, which deflects the mixture and further mixes it; the discharge pipeline elbow 7 is connected to the discharge pipeline 6 via a flange.

[0045] Example 2:

[0046] Based on Example 1, this example provides a method for using the rapid mixing device for sealing agents, specifically including the following steps:

[0047] When preparing the sealant, turn on the screw pump 1 and observe the flow rate through the mixing funnel 4 to ensure it meets the required flow rate. When the slurry supplied by the screw pump 1 passes through the mixing funnel 4, add the sealant material and mix it with the flowing liquid. The sealant material and liquid enter the discharge pipeline 6, merge again after passing through the diversion baffle 10, and are discharged through the discharge pipeline bend 7, flowing into the sealant preparation tank 8.

[0048] During the cycle operation of the device, the extracted drilling fluid is pumped into the suction tank to maintain the liquid level and prevent the screw pump 1 from running dry; the injection system draws plugging fluid from the configuration tank 8 and pumps it into the well.

[0049] The drilling fluid and plugging agent flow through the hose and are evenly mixed under the action of the diversion baffle 10. The mixture is even more uniform after being discharged through the bend 7 of the discharge pipeline.

[0050] When the plugging material is mixed evenly, the sealing layer structure formed on the well wall is more compact, can withstand greater pressure, and reduces secondary leakage caused by the rupture of the sealing layer.

[0051] Uniformly mixed sealing materials can better fill the leaking area, forming a stable sealing layer, effectively preventing further leakage, and thus improving the success rate of sealing. Uniform mixing ensures that every part of the sealing material can play its role, avoiding material waste caused by excessively high or low local material concentration.

[0052] In field practice, a certain well used a rapid mixing device for plugging agents 135 times, prepared 10,268 cubic meters of plugging agent with a concentration of 10%-35%, and performed 5 consolidation plugging operations, saving 60% of the time for preparing plugging agents, greatly improving operational efficiency, and ensuring downhole safety and the continuity of construction.

[0053] All components not discussed in detail in this application, as well as the connection methods of these components, are well-known technologies in this field. They can be directly applied and will not be elaborated further.

[0054] In this utility model, the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0055] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0056] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0057] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A quick mixing device for a lost circulation material, comprising a suction tank, a configuration tank, characterized in that, It also includes a liquid height enhancement module, an open dosing module, and a self-mixing pipeline for the drug solution; The liquid mixing pipeline is equipped with an inlet port, an outlet port, and a drug inlet port. The inlet port is connected to the outlet of the liquid height lifting module, the outlet port is connected to the preparation tank, and the drug inlet port is connected to the open dosing module. The liquid inlet of the liquid height lifting module is located inside the suction tank.

2. The rapid mixing device for sealing agent according to claim 1, characterized in that, The liquid height lifting module includes a screw pump; The screw pump includes a drive unit, a transmission shaft, helical blades, and a suction pipe; The spiral blades are disposed in the suction tube, the output end of the drive device is connected to the upper port of the suction tube, the output shaft of the drive device is fixedly connected to the spiral blades through a transmission shaft, and the suction tube has a liquid outlet above the spiral blades.

3. The rapid mixing device for sealing agent according to claim 2, characterized in that, The open-type dosing module includes a mixing funnel, the bottom of which is located above the outlet of the screw pump and within the head of the screw pump.

4. The rapid mixing device for sealing agent according to claim 3, characterized in that, A partition plate is installed inside the mixing funnel.

5. The rapid mixing device for sealing agent according to claim 3, characterized in that, The self-mixing pipeline includes a tee, the inlet of which is connected to the outlet of a screw pump via a supply pipeline, the outlet of which is connected to a mixing tank via a discharge pipeline, and the inlet of which is connected to the bottom of a mixing funnel.

6. The rapid mixing device for sealing agent according to claim 5, characterized in that, The liquid supply line is a flexible hose.

7. The rapid mixing device for sealing agent according to claim 5, characterized in that, The discharge pipeline is a rigid steel pipe, and a flow divider baffle is installed inside the discharge pipeline. A discharge pipeline elbow is installed at the end of the discharge pipeline, and the outlet of the discharge pipeline elbow is suspended inside the configuration tank.

8. The rapid mixing device for sealing agent according to claim 7, characterized in that, The discharge pipeline bend is a 120° bend.

9. The rapid mixing device for sealing agent according to claim 7, characterized in that, The diversion baffle has a triangular cross-section with the pointed corner facing the tee, and the diversion baffle is distributed in a series of rhomboid arrays.

10. The rapid mixing device for sealing agent according to claim 9, characterized in that, The diversion baffle is perpendicular to the ground.

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