Non-open type slurry circulation equipment for horizontal directional drilling and reaming
By designing a non-open mud circulation device, which utilizes a negative pressure chamber and filter components to recover mud, the problem of mud loss was solved, resulting in cost reduction and improved system stability.
Patent Information
- Application Number
- CN202520863894.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-30
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-04-30
AI Technical Summary
Traditional open-loop mud circulation systems are prone to mud loss during horizontal directional drilling and reaming operations, leading to increased costs. Existing technologies cannot effectively solve the problem of mud leakage under complex geological conditions.
Design a non-open mud circulation device, including a mud treatment unit, a drill bit and a negative pressure adsorption device, to recover mud through a negative pressure chamber and a filter assembly, thereby reducing mud loss.
It effectively reduces mud loss, lowers construction costs, ensures the stable operation of the mud circulation system, and avoids blockage of mud pipelines.
Smart Images
Figure CN223908157U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of directional drilling reaming, in particular to a non-opened mud circulating equipment for horizontal directional drilling reaming. BACKGROUND
[0002] In recent years, with the vigorous development of infrastructure industry, the construction level of horizontal directional drilling has also been greatly developed. However, the traditional mud circulating system generally adopts an open mud circulating mode in the construction of horizontal directional drilling reaming. Mud is directly sprayed into the underground rock layer through the drill bit. When cracks or broken zones are encountered, mud is prone to flow out along the cracks, resulting in a significant increase in mud loss and a significant increase in construction cost. Although mud filtering devices exist in the prior art, they still cannot solve the problem of mud leakage under complex geological conditions, resulting in high construction cost of reaming. Therefore, there is an urgent need for a circulating device that can reduce mud loss. SUMMARY
[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the utility model is to provide a non-opened mud circulating equipment for horizontal directional drilling reaming, which can reduce the loss caused by the leakage of mud from the cracks in the rock layer and greatly reduce the cost of reaming the rock layer.
[0004] To achieve the above-mentioned purposes and other related purposes, the utility model provides the following technical scheme:
[0005] A non-opened mud circulating equipment for horizontal directional drilling reaming, comprising a mud treatment unit, a drill bit and a negative pressure adsorption device connected by a drill rod to form a mud circuit for the flow of high-pressure mud, the drill bit and the negative pressure adsorption device being installed in sequence along the direction of mud flow, the direction of mud flow being opposite to the direction of the reaming process, the negative pressure adsorption device comprising a mud pipeline in communication with the drill rod at both ends, a plurality of adsorption holes arranged on the outer periphery of the mud pipeline, and a negative pressure chamber arranged in the mud pipeline, the mud treatment unit comprising a mud storage tank, the mud storage tank being provided with a mud inlet and a mud outlet connected with the drill rod.
[0006] Further, a through stepped hole gradually narrowing in the direction of mud flow is arranged in the mud pipeline; a hollow cylindrical pressure boosting mechanism and a jet mechanism are arranged in sequence and spaced apart in the through stepped hole in the direction of gradually reducing hole diameter; and the negative pressure chamber is surrounded by the inner wall of the through stepped hole, the pressure boosting mechanism and the jet mechanism.
[0007] Further, a mud pressure boosting hole gradually reducing in hole diameter in the direction of mud flow is arranged in the pressure boosting mechanism; a variable diameter hole is arranged in the jet mechanism, the hole diameters at both ends of the variable diameter hole being greater than the hole diameter at the middle part; and both ends of the negative pressure chamber are in communication with the mud pressure boosting hole and the variable diameter hole, respectively.
[0008] Further, the negative pressure adsorption device further comprises a filter assembly arranged on the outer periphery of the mud pipeline; the filter assembly comprises filter plates arranged continuously around the outer periphery of the mud pipeline and filter cavities formed by the filter plates and the outer periphery of the mud pipeline; the filter cavities are communicated with the negative pressure cavities through adsorption holes.
[0009] Further, the adsorption holes are provided with mud nozzles, and one end of the adsorption holes communicated with the negative pressure cavities is inclined towards the jet mechanism.
[0010] Further, the mud treatment unit comprises a workbench arranged on the ground for supporting the slurry tank, a vacuum extraction assembly arranged on the workbench and a slurry discharge assembly; the vacuum extraction assembly comprises a vacuum pipe vertically arranged in the slurry tank and a vacuum pump connected with the vacuum pipe; the setting height of the vacuum pipe is higher than the maximum height of the slurry in the slurry tank.
[0011] Further, the slurry discharge assembly comprises a slurry pump and a slurry discharge pipeline connected with each other; the slurry pump is communicated with the slurry discharge port through the slurry discharge pipeline, and the slurry in the tank body is circulated and discharged into the drill rod through the slurry discharge pipeline.
[0012] Further, the mud treatment unit further comprises a control panel for adjusting the air pressure in the tank body.
[0013] As described above, the non-open mud circulating equipment for horizontal directional drilling reaming has the following beneficial effects:
[0014] 1、In the utility model, the negative pressure cavities are formed in the mud pipeline through the design of the pressure boosting mechanism, the mud in the drill hole is effectively recovered, and the loss of the mud in the reaming process is greatly reduced.
[0015] 2、In the utility model, the design of the filter assembly effectively avoids the blockage of the mud pipeline caused by the slag entering the mud pipeline, and ensures the stable performance of the mud circulating and reaming process. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 A structure schematic view showing that the drill bit and the negative pressure device are sequentially arranged in the utility model.
[0017] Figure 2 A structure schematic view showing the mud treatment unit in the utility model.
[0018] Figure 3 A front view showing the negative pressure adsorption device in the utility model.
[0019] Figure 4 A front view showing the negative pressure adsorption device in the utility model. Figure 3 A sectional view along the line A-A.
[0020] Figure 5 A sectional view showing the mud pipeline in the utility model.
[0021] Figure 6 The figure shows the structure of the filter assembly in the utility model.
[0022] Figure 7 The figure shows the top view of the mud processing unit in the utility model.
[0023] Figure 8 The figure shows the Figure 7 The sectional view along the line B-B.
[0024] 1, drill pipe; 2, mud processing unit; 21, slurry storage tank; 211, slurry inlet; 212, slurry outlet; 22, workbench; 23, vacuum extraction assembly; 231, vacuum pipe; 232, vacuum pump; 24, slurry discharge assembly; 241, slurry pump; 242, slurry discharge pipeline; 25, control panel; 3, drill bit; 4, negative pressure adsorption device; 41, slurry pipeline; 411, adsorption hole; 412, through step hole; 413, slurry nozzle; 42, negative pressure chamber; 43, pressure increasing mechanism; 431, slurry pressure increasing hole; 44, jet mechanism; 441, variable diameter hole; 45, filter assembly; 451, filter plate; 452, filter chamber; 453, partition; 454, first chamber. DETAILED DESCRIPTION
[0025] The embodiments of the utility model will be described below by specific examples. Those skilled in the art can easily understand other advantages and effects of the utility model from the content disclosed in the specification.
[0026] Please refer to Figures 1-8 It should be understood that the structures, proportions, sizes, etc. shown in the drawings attached to the specification are only used to cooperate with the content disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the implementation conditions of the utility model, so they do not have technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects and purposes that the utility model can produce, should still fall within the scope of the technical content disclosed by the utility model. At the same time, the terms such as "up", "down", "left", "right", "middle" and "one" in the specification are only for the convenience of clear description, and are not used to limit the scope of the utility model, the change or adjustment of the relative relationship, without changing the technical content, is also considered as the scope of the utility model.
[0027] Please refer to Figures 1 to 8The utility model provides a non - open type mud circulating equipment of horizontal directional drilling reaming, including mud processing unit 2, drill bit 3 and negative pressure adsorption device 4 that are connected through drill rod 1 and form the mud circuit of mud flow circulation of high pressure mud, wherein, high pressure mud flows in drill rod 1, drill bit 3 and negative pressure adsorption device 4 are installed along the direction of mud flow in proper order, and the direction of mud flow is contrary to the direction of reaming process.
[0028] Further, negative pressure adsorption device 4 includes mud pipeline 41 that is communicated with drill rod 1 at both ends, a plurality of adsorption holes 411 that are all arranged on the outer circumferential surface of mud pipeline 41, and negative pressure chamber 42 that is arranged in mud pipeline 41.
[0029] Further, mud processing unit 2 includes slurry storage tank 21, and mud inlet 211 and mud outlet 212 are arranged on slurry storage tank 21 and connected with drill rod 1.
[0030] In the process of reaming, mud flows through drill bit 3 and negative pressure adsorption device 4 in drill rod 1 in sequence, mud nozzle is arranged on drill bit 31, mud sprayed from the mud nozzle will be temporarily retained in the drill hole near drill bit 3 and negative pressure adsorption device 4, and the mud retained in the drill hole will be adsorbed into negative pressure chamber 42 through adsorption holes 411 because negative pressure chamber 42 is arranged in mud pipeline 41.
[0031] Therefore, through the design of negative pressure adsorption device 4, most of the mud can be recycled, and most of the mud in the drill hole will not leak from the rock crevice like the open mud circulating system, so that the mud recycling rate is greatly improved, and the construction cost of enterprises is reduced.
[0032] Please continue to refer to Figures 3 to 4 Mud pipeline 41 is provided with through stepped hole 412 that gradually reduces in hole diameter along the mud flow direction.
[0033] The through stepped hole 412 is provided with booster mechanism 43 and jet mechanism 44 in sequence and at intervals along the direction of gradually reducing hole diameter, and booster mechanism 43 and jet mechanism 44 are both hollow cylindrical structures.
[0034] Further, negative pressure chamber 42 is surrounded by booster mechanism 43, jet structure and the inner wall of through stepped hole 412.
[0035] The high-speed mud passes through through stepped hole 412 that gradually reduces in hole diameter, and the flow rate is further improved, a great pressure difference is formed between mud pipeline 41 and the outside when the mud flows through negative pressure chamber 42, so that the mud retained outside mud pipeline 41 is adsorbed into negative pressure chamber 42 through adsorption holes 411, and then flows into the subsequent drill rod 1 along with the high-pressure mud in through stepped hole 412.
[0036] Please continue to refer to Figure 4, the pressurizing mechanism 43 is provided with a mud pressurizing hole 431 with a gradually decreasing diameter along the flow direction of the mud. The design of the mud pressurizing hole 431 further enhances the flow rate of the mud, further increases the pressure difference between the inside and outside of the negative pressure chamber 42, and further enhances the suction force of the negative pressure suction device 4, so that the mud remaining outside the mud pipeline 41 can be better and faster recovered, and the loss of the mud can be reduced.
[0037] Further, the jet mechanism 44 is provided with a variable-diameter hole 441, and the two ends of the negative pressure chamber 42 are connected to the variable-diameter hole 441 and the mud pressurizing hole 431, respectively.
[0038] Further, the diameter of the hole at the two ends of the jet mechanism 44 is greater than the diameter of the hole at the middle part of the jet mechanism 44. After the mud flows through the negative pressure chamber 42, it will flow to the subsequent drill pipe 1, i.e., high pressure and high flow rate are no longer needed. Therefore, the variable-diameter hole 441 is provided to moderate the high-speed and high-pressure mud into stable-speed and stable-pressure mud, so as to facilitate the recovery of the subsequent mud treatment unit 2.
[0039] Please refer to Figure 3 , Figure 4 and Figure 5 , the negative pressure suction device 4 further comprises a filter assembly 45 arranged on the outer periphery of the mud pipeline 41.
[0040] Specifically, the filter assembly 45 comprises a partition plate 453 and filter plates 451 continuously arranged around the outer periphery of the mud pipeline 41, and the filter plates 451 and the outer periphery of the mud pipeline 41 surround to form a filter chamber 452.
[0041] The partition plate 453 is arranged perpendicular to the axis of the mud pipeline 41 and divides the filter chamber 452 into a plurality of first chambers 454, and each first chamber 454 corresponds to an adsorption hole 411.
[0042] During the reaming process of the drill bit 3, slag will be continuously generated and mixed in the mud. If the slag is adsorbed into the mud pipeline 41, it will cause the blockage of the mud pipeline 41. Therefore, the arrangement of the filter assembly 452 can effectively block the slag with excessive volume in the mud outside, so as to ensure the normal flow of the mud circulation passage.
[0043] Further, the two ends of the adsorption hole 411 are connected to the negative pressure chamber 42 and the first chamber 454, respectively, and the end of the adsorption hole 411 connected to the negative pressure chamber 42 is inclined toward the jet mechanism 44. The inclined arrangement of the adsorption hole 411 enables the mud in the mud pipeline 41 to be inclined into the negative pressure chamber 42, and the mud entering the negative pressure chamber 42 will not vertically impact the high-pressure mud entering the negative pressure chamber 42 from the drill hole, so as to prevent the high-pressure mud from losing its original speed and ensure that the pressure difference between the inside and outside of the negative pressure chamber 42 is maintained within a stable range.
[0044] Please refer to Figure 2 , Figure 7and Figure 8 The mud processing unit 2 comprises a workbench 22 arranged on the ground, a vacuum extraction assembly 23 and a mud discharge assembly 24 arranged on the workbench 22, and the mud storage tank 21 is arranged on the workbench 22.
[0045] The mud pipeline 41 is communicated with the mud processing unit 2 through the drill pipe 1, and the mud discharged from the mud pipeline 41 flows through the drill pipe 1 and the mud inlet 211 and finally flows into the mud storage tank 21.
[0046] It should be noted that the valves are arranged at the mud inlet 211 and the mud outlet 212, and when the vacuum extraction assembly 23 works, the valves at the mud inlet 211 and the mud outlet 212 are closed, so that the mud storage tank 21 is in a sealed state.
[0047] Please continue to refer to Figure 8 The vacuum extraction assembly 23 comprises a vacuum pipe 231 vertically arranged in the mud storage tank and a vacuum pump 232 connected to the vacuum pipe 231.
[0048] Specifically, the setting height of the vacuum pipe 231 is higher than the maximum height of the mud in the mud storage tank 21. The vacuum pump 232 creates negative pressure in the mud storage tank 21 through the vacuum pipe 231, and the mud in the drill pipe 1 is sucked into the mud storage tank 21 through the negative pressure, so the setting height of the vacuum pipe 231 needs to be greater than the maximum height of the mud in the tank body to avoid the mud entering the vacuum pipe 231 and to ensure the normal operation of the mud processing unit 2.
[0049] Please continue to refer to Figure 2 The mud discharge assembly 24 comprises a slurry pump 241 and a mud discharge pipeline 242 connected to each other.
[0050] The slurry pump 241 is communicated with the mud outlet 212 through the mud discharge pipeline 242, and the mud in the tank body is discharged into the drill pipe 1 through the mud discharge pipeline 242. After the tank body is vacuumed, the valve at the mud inlet 211 is opened, and the mud gradually flows into the mud storage tank 21. When the mud no longer flows in, the valve at the mud outlet 212 is opened, the slurry pump 241 discharges the mud in the tank body through the mud discharge pipeline 242, and the mud flows into the drill pipe 1 again to enter the next cycle.
[0051] Preferably, the mud processing unit 2 further comprises a control panel 25, and a technician adjusts the air pressure in the mud storage tank 21 and the suction and discharge of the mud in the tank body by operating the control panel 25.
[0052] The implementation principle of the non-opened mud circulating equipment for horizontal directional drilling reaming is as follows: after the horizontal directional drilling is completed, the drill rod 1, the drill bit 3 and the negative pressure adsorption device 4 perform reaming from the drilled hole to the drilled hole, and the mud is input into the drill rod 1; at this time, the drill bit 3 performs reaming, and part of the mud in the drill rod 1 is sprayed from the drill bit 3 into the drilled hole, so as to cool and lubricate the drill bit 3, and the other part enters the mud pipeline 41 from the drill rod 1; due to the negative pressure chamber 42 in the mud pipeline 41, most of the mud remaining in the drilled hole is adsorbed back into the mud pipeline 41, and flows into the mud treatment unit 2 along the drill rod 1. The mud treatment unit 2 sucks the mud into the tank body through the vacuum pumping assembly 23, when the mud in the tank body reaches the preset height, the mud is discharged from the tank body into the drill rod 1 through the mud discharge pipeline 242, and the next cycle is entered.
[0053] The above embodiment only illustrates the principle and effect of the utility model, and is not used to limit the utility model. Any person skilled in the art can modify or change the above embodiment without departing from the spirit and scope of the utility model. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the utility model should be covered by the claims of the utility model.
Claims
1. A non-open mud circulating device for horizontal directional drilling reaming, characterized in that it comprises a mud processing unit (2) connected by a drill pipe (1) to form a mud circuit for high-pressure mud flow, a drill bit (3) and a negative pressure adsorption device (4); the drill bit (3) and the negative pressure adsorption device (4) are sequentially installed along the direction of mud flow, and the direction of mud flow is opposite to the direction of reaming process; the negative pressure adsorption device (4) comprises a mud pipeline (41) in communication with the drill pipe (1) at both ends, a plurality of adsorption holes (411) each arranged on the outer periphery of the mud pipeline (41), and a negative pressure chamber (42) arranged in the mud pipeline (41); the mud processing unit (2) comprises a mud storage tank (21), and the mud storage tank (21) is provided with a mud inlet (211) and a mud outlet (212) connected with the drill pipe (1) respectively. The mud pipeline (41) is provided with a through stepped hole (412) gradually reduced in the direction of mud flow; the through stepped hole (412) is sequentially and spacedly provided with a hollow cylindrical pressure boosting mechanism (43) and a jet mechanism (44) in the direction of gradually reducing hole diameter; the negative pressure chamber (42) is surrounded by the inner wall of the pressure boosting mechanism (43), the jet mechanism (44) and the through stepped hole (412).
2. A non-open-arc mud circulation apparatus for horizontal directional drilling hole enlarging according to claim 1, characterized in that, The pressure boosting mechanism (43) is provided with a mud pressure boosting hole (431) gradually reduced in hole diameter in the direction of mud flow; the jet mechanism (44) is provided with a variable diameter hole (441), and the hole diameters at both ends of the variable diameter hole (441) are greater than the hole diameter at the middle part; the two ends of the negative pressure chamber (42) are in communication with the mud pressure boosting hole (431) and the variable diameter hole (441) respectively.
3. A non-open-arc mud circulation apparatus for horizontal directional drilling hole enlarging according to claim 2, characterized in that, The negative pressure adsorption device (4) further comprises a filter assembly (45) arranged on the outer periphery of the mud pipeline (41); the filter assembly (45) comprises a filter plate (451) continuously arranged around the outer periphery of the mud pipeline (41) and a filter chamber (452) formed by the filter plate (451) and the outer periphery of the mud pipeline (41); the filter chamber (452) is in communication with the negative pressure chamber (42) through the adsorption hole (411).
4. A non-open-arc mud circulation apparatus for horizontal directional drilling hole enlarging according to claim 2, characterized in that, The adsorption hole (411) is provided with a mud nozzle (413), and one end of the adsorption hole (411) in communication with the negative pressure chamber (42) is inclined towards the jet mechanism (44).
5. A non-open-arc mud circulation apparatus for horizontal directional drilling hole enlarging according to claim 4, characterized in that, The mud processing unit (2) comprises a workbench (22) arranged on the ground for supporting the mud storage tank (21), a vacuum pumping assembly (23) and a slurry discharging assembly (24) arranged on the workbench (22); the vacuum pumping assembly (23) comprises a vacuum pipe (231) vertically arranged in the mud storage tank (21) and a vacuum pump (232) connected with the vacuum pipe (231); the setting height of the vacuum pipe (231) is higher than the maximum height of the mud in the mud storage tank (21).
6. A non-open-arc mud circulation apparatus for horizontal directional drilling hole enlarging according to claim 1, characterized in that, The slurry discharging assembly (24) comprises a slurry pump (241) and a slurry discharging pipeline (242) connected with each other; the slurry pump (241) is in communication with the slurry discharging pipeline (242) and the slurry discharging port, and the slurry in the tank body is circulated and discharged into the drill pipe (1) through the slurry discharging pipeline (242).
7. A non-open-arc mud circulation apparatus for horizontal directional drilling hole enlarging according to claim 6, characterized in that, 8. A non-open-arc mud circulation apparatus for horizontal directional drilling hole enlarging according to claim 7, characterized in that, The mud processing unit (2) further comprises a control panel (25) for adjusting the air pressure inside the tank.