A borehole flushing device

Abstract

A drilling flushing device, belonging to the field of drilling technology, includes a cleaning fluid delivery pipe. The cleaning fluid delivery pipe includes a base pipe and multiple extension pipes. The top of the base pipe has an internal thread, and the bottom of the extension pipe has an external thread and the top of the extension pipe has an internal thread. The multiple extension pipes are extended by assembling through the internal and external threads, and the lowermost extension pipe is screwed together with the base pipe. The top of the uppermost extension pipe is screwed to a delivery connector. At least three pneumatic telescopic positioning mechanisms are fixedly fixed circumferentially on the outer surface of the delivery connector. A pneumatic conveying and discharging mechanism is fixed between the multiple pneumatic telescopic positioning mechanisms. A sealing plate is fixedly installed on the upper surface of the delivery connector. The sealing plate has a liquid inlet and a liquid outlet through it. The liquid inlet is connected to the delivery connector. A high-pressure water supply pipe and a water pumping pipe are screwed to the liquid inlet and the liquid outlet, respectively. This utility model can improve the stability and sealing of the cleaning fluid delivery pipe in the borehole, prevent the cleaning fluid from leaking under high pressure, and maintain the pressure stability in the borehole to improve the cleaning effect.

Description

Technical Field

[0001] This utility model belongs to the field of drilling technology, and specifically relates to a drilling flushing device. Background Technology

[0002] In post-drilling cleaning operations, the stability and sealing of the borehole flushing device are crucial to the cleaning effect and operational safety.

[0003] In practical applications, traditional borehole flushing devices often lack effective positioning and sealing structures, causing the cleaning fluid delivery pipe to easily shake and shift within the borehole, making precise positioning impossible and affecting the effective delivery and discharge of the cleaning fluid. Simultaneously, poor sealing performance makes it difficult to maintain pressure within the borehole, leading to cleaning fluid leakage. This not only reduces cleaning efficiency but may also result in incomplete removal of impurities from the borehole wall, affecting borehole quality and even causing environmental pollution and fluid pressure loss, failing to meet the demands for efficient and high-quality borehole flushing operations. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a drilling flushing device to solve the problems of existing drilling flushing devices, such as the lack of effective positioning and sealing structure, which leads to problems such as the shaking and displacement of the cleaning fluid delivery pipe, easy leakage of cleaning fluid, low cleaning efficiency, affected drilling quality, environmental pollution, and fluid pressure loss.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A drilling flushing device includes a cleaning fluid delivery pipe, which comprises a base pipe and multiple extension pipes. The base pipe is closed at the bottom and has multiple drain ports circumferentially extending through its lower outer surface. The top of the base pipe has an internal thread. The bottom ends of the extension pipes have external threads, and the top ends have internal threads. The multiple extension pipes are extended by being assembled using the internal and external threads, and the lowest extension pipe is screwed together with the internal thread of the base pipe via its bottom external thread. A delivery connector is screwed to the top of the uppermost extension pipe. At least three pneumatic telescopic positioning mechanisms are circumferentially fixed at equal intervals on the outer surface of the delivery connector. A pneumatic conveying and discharging mechanism is fixed between the multiple pneumatic telescopic positioning mechanisms. The pneumatic conveying and discharging mechanism is connected to an external nitrogen tank. A sealing plate is fixedly installed on the upper surface of the delivery connector. The sealing plate has a delivery hole and a drain hole that extend through it. The delivery hole communicates with the delivery connector. The delivery hole and the drain hole have the same diameter and are respectively screwed to a high-pressure water supply pipe and a water suction pipe. A rubber sealing ring is fixed on the lower surface of the sealing plate.

[0007] In the above technical solution, a sealing ring is provided between the conveying joint and the adjacent extension pipe.

[0008] In the above technical solution, the pneumatic conveying and discharging mechanism includes a gas conveying ring, which has an air inlet and multiple exhaust holes. The number of exhaust holes is the same as the number of pneumatic telescopic positioning mechanisms, and each exhaust hole is fixedly connected to a gas conveying pipe. An injection pipe is fixedly connected to the air inlet, and a nitrogen pipe connector is provided at the air inlet end of the injection pipe. The nitrogen pipe connector is used to connect to the nitrogen pipe of an external nitrogen tank.

[0009] In the above technical solution, the gas injection pipe is equipped with a vent valve and a one-way valve.

[0010] In the above technical solution, sealing gaskets are respectively provided at the connection between the high-pressure water supply pipe, the water pumping pipe and the sealing plate.

[0011] The drilling flushing device of this utility model has the following advantages compared with the prior art:

[0012] This utility model, by setting up a pneumatic telescopic positioning mechanism and a pneumatic conveying mechanism, can use an external nitrogen tank to inject air to make the positioning head extend and fit against the inner wall of the borehole, which improves the stability of the cleaning fluid delivery pipe in the borehole and avoids shaking and displacement. The design of combining a sealing plate with a rubber sealing ring and setting sealing rings and sealing gaskets at the connection of each component enhances the sealing performance, prevents cleaning fluid leakage under high pressure, maintains stable pressure in the borehole to improve the cleaning effect, and at the same time avoids cleaning fluid leakage from polluting the environment, reducing safety hazards, reducing fluid pressure loss, ensuring operational safety, and being energy-saving and environmentally friendly.

[0013] In addition, by setting infusion and drainage holes of the same size, the water pumping pipe can be used interchangeably between the infusion and drainage holes, and the residual liquid in the borehole can be extracted in conjunction with the cleaning fluid delivery pipe, thereby optimizing the cleaning process and improving work efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the bottom tube structure of this utility model.

[0016] Figure 3 This is a schematic diagram of the extension tube structure of this utility model.

[0017] Figure 4 This is a schematic cross-sectional view of the conveyor joint of this utility model.

[0018] Figure 5 This is a schematic diagram of the pneumatic conveying and discharging mechanism of this utility model.

[0019] Figure 6 This is a schematic diagram of the cross-sectional structure of the sealing plate of this utility model.

[0020] Figure 7 This is a schematic diagram of the structure of this utility model in use.

[0021] Figures 1-7 The components are as follows: 1. Bottom pipe; 11. Drain outlet; 2. Extension pipe; 3. Conveying connector; 31. Sealing ring; 4. Pneumatic telescopic positioning mechanism; 41. Sliding sleeve; 42. Positioning head; 43. Spring; 44. Annular sealing seat; 5. Pneumatic conveying and discharging mechanism; 51. Air conveying ring; 52. Air conveying pipe; 53. Air injection pipe; 531. Air release valve; 532. One-way air valve; 54. Nitrogen pipe connector; 6. Sealing plate; 61. Liquid inlet; 611. High-pressure water supply pipe; 62. Drain outlet; 621. Water pumping pipe; 7. Rubber sealing ring. Detailed Implementation

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

[0023] In this embodiment, front, back, left, right, top, and bottom are... Figure 1 Describe the reference plane. See [link / reference] Figures 1-7 This utility model provides a technical solution:

[0024] A drilling flushing device includes a cleaning fluid delivery pipe, which comprises a base pipe 1 and multiple extension pipes 2. The bottom of the base pipe 1 is closed, and multiple drain ports 11 are circumferentially opened on the outer surface of its lower end. The top of the base pipe 1 is provided with an internal thread for connecting the extension pipes 2. The bottom end of the extension pipe 2 is provided with an external thread, and the top end is provided with an internal thread. The multiple extension pipes 2 can be assembled together to extend their service length through the engagement of the internal and external threads. The extension pipes 2 are assembled by screwing the external thread at their lower end to the internal thread of the base pipe 1. A delivery connector 3 is screwed to the top end of the uppermost extension pipe 2. At least three pneumatic telescopic positioning mechanisms 4 are fixedly installed circumferentially at equal intervals on the outer surface of the delivery connector 3. The positioning mechanism 4 is used to stably fix the cleaning fluid delivery pipe in the borehole. A pneumatic delivery mechanism 5 is fixedly installed between multiple pneumatic telescopic positioning mechanisms 4. After the pneumatic delivery mechanism 5 is connected to an external nitrogen tank, it can deliver nitrogen into multiple pneumatic telescopic positioning mechanisms 4, so that they extend and fit against the inner wall of the borehole to complete the positioning work. A sealing plate 6 is fixedly installed on the upper surface of the delivery joint 3. A liquid delivery hole 61 and a liquid discharge hole 62 are provided through the upper surface of the sealing plate 6. The liquid delivery hole 61 is connected to the delivery joint 3. The diameters of the liquid delivery hole 61 and the liquid discharge hole 62 are the same. A high-pressure water supply pipe 611 and a water pumping pipe 621 are screwed into the liquid delivery hole 61 and the liquid discharge hole 62, respectively. A rubber sealing ring 7 is fixedly installed on the lower surface of the sealing plate 6.

[0025] Before use, connect multiple extension pipes 2 to the bottom pipe 1 according to the drilling depth to complete the assembly and transfer of the cleaning fluid delivery pipe. Then, connect the uppermost extension pipe 2 to the delivery connector 3.

[0026] When using, combine Figure 6 and Figure 7As shown, the cleaning fluid delivery pipe is inserted entirely into the borehole. Then, the sealing plate 6 is pressed firmly so that the rubber sealing ring 7 below it is tightly pressed against the ground, sealing the borehole opening. Next, the pneumatic delivery mechanism 5 is connected to an external nitrogen tank, which supplies nitrogen to multiple pneumatic telescopic positioning mechanisms 4, causing them to extend and adhere to the borehole wall, thus stably positioning the cleaning fluid delivery pipe inside the borehole. Subsequently, the high-pressure water supply pipe 611 is connected to an external high-pressure pump, and the water suction pipe 621 is connected to an external water pump. The external high-pressure pump supplies the cleaning fluid into the borehole. The cleaning fluid is discharged from the drain outlet 11 to the bottom of the borehole via the delivery connector 3, extension pipe 2, and bottom pipe 1. With the increase in volume, the internal pressure increases due to the sealing of the borehole. After the cleaning fluid fills the borehole, it carries impurities from the borehole wall into the water pumping pipe 621 through the drain hole 62 and is then pumped out by the water pump. After cleaning is completed, the external high-pressure pump and the water pump are stopped. The high-pressure water supply pipe 611 is removed, and the water pumping pipe 621 is plugged and screwed into the inlet hole 61. The water pump is then started, and the remaining fluid in the borehole is pumped out using the water pump, the water pumping pipe 621, and the cleaning fluid delivery pipe, thus completing the entire cleaning process. Compared with the existing technology, this device, through the setting of the pneumatic telescopic positioning mechanism 4 and the sealing design, ensures the stability and sealing of the cleaning fluid delivery pipe in the borehole, effectively improving the cleaning effect.

[0027] To ensure a good seal after the conveyor joint 3 is connected to the extension pipe 2, a sealing ring 31 is fitted at the connection between the conveyor joint 3 and the extension pipe 2.

[0028] It should be noted that, in combination Figure 4 As shown, the pneumatic telescopic positioning mechanism 4 includes a sliding sleeve 41. One end of the sliding sleeve 41 is welded and sealed on the outer surface of the conveying connector 3. A positioning head 42 is slidably installed inside the sliding sleeve 41. A return spring 43 is fixedly installed between the positioning head 42 and the outer surface of the conveying connector 3. An annular sealing seat 44 is fixedly installed on the side of the positioning head 42 near the conveying connector 3. The outer surface of the annular sealing seat 44 is in contact with the inner wall of the sliding sleeve 41 to ensure a seal between the positioning head 42 and the sliding sleeve 41. When the pneumatic conveying mechanism 5 injects air into the sliding sleeve 41, the positioning head 42 can move outward to fit against the borehole wall to complete the positioning of the cleaning fluid conveying pipe. When the pneumatic conveying mechanism 5 depressurizes, the positioning head 42 can move inward with the help of the return spring 43 to discharge the gas in the sliding sleeve 41, thereby resetting the entire pneumatic telescopic positioning mechanism 4 and releasing the positioning of the cleaning fluid conveying pipe.

[0029] In addition, combined Figure 4 and Figure 5As shown, the pneumatic supply and discharge mechanism 5 includes a supply ring 51. The supply ring 51 has one air inlet and multiple exhaust holes. The number of exhaust holes is the same as the number of pneumatic telescopic positioning mechanisms 4. Each exhaust hole is fixedly connected to a supply pipe 52 between itself and its corresponding sliding sleeve 41. An injection pipe 53 is fixedly connected to the air inlet. A nitrogen pipe connector 54 is provided at the air inlet end of the injection pipe 53. The nitrogen pipe connector 54 is used to connect to the nitrogen pipe of an external nitrogen tank. A vent is provided inside the injection pipe 53. In actual use, the gas valve 531 and the one-way gas valve 532 can be connected to an external nitrogen tank via the nitrogen pipe connector 54. The nitrogen tank is used to inject gas into the sliding sleeve 41 through the gas injection pipe 53, the gas supply ring 51 and multiple gas supply pipes 52, thereby pushing the positioning head 42 outward. When the gas pressure in the sliding sleeve 41 is released, the gas release valve 531 in the gas injection pipe 53 is opened. Under the action of the return spring 43, the positioning head 42 is reset, and the gas can be discharged from the gas release valve 531.

[0030] Finally, to ensure the reliable sealing performance of the fluid transport connection structure composed of the high-pressure water supply pipe 611, the pumping pipe 621, and the sealing plate 6, effectively preventing media leakage of the cleaning fluid under high-pressure transport conditions and avoiding environmental pollution and fluid pressure loss caused by leakage, sealing gaskets are installed at the connections of the high-pressure water supply pipe 611, the pumping pipe 621, and the sealing plate 6. The sealing gaskets fill the microscopic gaps between the connecting components, forming an effective sealing contact surface, ensuring the stability of fluid transport and the safety of the working environment during the drilling flushing process.

Claims

1. A borehole flushing device, characterized in that: The cleaning fluid delivery pipe includes a bottom pipe (1) and multiple extension pipes (2). The bottom pipe (1) is closed at the bottom and has multiple drain ports (11) circumferentially penetrating the outer surface of its lower end. The top of the bottom pipe (1) is provided with internal threads. The extension tube (2) has an external thread at the bottom and an internal thread at the top. Multiple extension tubes (2) are extended by assembling the internal and external threads. The lowermost extension tube (2) is screwed together with the internal thread of the bottom tube (1) by the external thread at the bottom. The uppermost extension tube (2) is screwed with a conveying connector (3) at the top. At least three pneumatic telescopic positioning mechanisms (4) are fixed circumferentially at equal intervals on the outer surface of the conveying connector (3). A pneumatic conveying mechanism (5) is fixed between multiple pneumatic telescopic positioning mechanisms (4). The pneumatic conveying mechanism (5) is connected to an external nitrogen tank. A sealing plate (6) is fixedly installed on the upper surface of the conveying connector (3). The sealing plate (6) has a liquid infusion hole (61) and a liquid drain hole (62) through it. The liquid infusion hole (61) is connected to the conveying connector (3). The liquid infusion hole (61) and the liquid drain hole (62) have the same diameter and are respectively screwed with a high-pressure water supply pipe (611) and a water pumping pipe (621). A rubber sealing ring (7) is fixed on the lower surface of the sealing plate (6).

2. The drilling flushing device according to claim 1, characterized in that, A sealing ring (31) is provided between the conveying joint (3) and the adjacent extension pipe (2).

3. The drilling flushing device according to claim 2, characterized in that, The pneumatic conveying and discharging mechanism (5) includes a conveying ring (51), which has an air inlet and multiple exhaust holes. The number of exhaust holes is the same as the number of pneumatic telescopic positioning mechanisms (4). Each exhaust hole is fixedly connected to a conveying pipe (52) and the corresponding sliding sleeve (41). An injection pipe (53) is fixedly connected to the air inlet. A nitrogen pipe connector (54) is provided at the air inlet end of the injection pipe (53). The nitrogen pipe connector (54) is used to connect to the nitrogen pipe of an external nitrogen tank.

4. The drilling flushing device according to claim 3, characterized in that, The air injection pipe (53) is equipped with a vent valve (531) and a one-way valve (532).

5. A borehole flushing device according to claim 1, characterized in that, Sealing gaskets are respectively installed at the connection points of the high-pressure water supply pipe (611), the water pumping pipe (621) and the sealing plate (6).

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