A high-efficiency mud circulation device for horizontal directional drilling rig

Abstract

The present invention belongs to the technical field of drilling rig mud processing equipment, specifically a high-efficiency mud circulation device for horizontal directional drilling rigs. This device mainly includes a frame body, a drill rod, a drainage and collection component, a flow control and reinforcement component, a mixing and dispensing component and a mixing chamber. The drainage and collection component and the flow control and reinforcement component of the present invention cooperate to give priority to recovering the drilling mud before the drilling mud overflows from the top of the borehole, thereby avoiding its long-term accumulation in the borehole; the mixing and dispensing component can fully crush and re-mix the recovered drilling mud to ensure the mud consistency and quality; the mixing chamber adjusts the composition and consistency of the mud by introducing additional mud, thereby avoiding the problem of mud quality degradation caused by repeated self-circulation of the mud; the flow control and reinforcement component effectively controls the thickness and uniformity of the mud on the inner wall of the borehole, and the pressure generated by scraping off excess mud can radially reinforce the mud in the borehole, thereby improving the wall protection effect of the mud in the borehole.

Description

Technical Field

[0001] The invention belongs to the technical field of drilling rig mud processing equipment, in particular to a high-efficiency mud circulation device for a horizontal directional drilling rig. Background Art

[0002] The drilling mud circulation system is primarily used to recycle and purify the circulating mud during drilling rig operation, ensuring that the mud's performance meets drilling requirements. The positive circulation system uses high pressure to inject mud through the bottom of the drill's hollow drill shaft. The rotation of the drill bit at the bottom stirs the soil layer, forming cuttings.

[0003] However, in actual use, it is necessary to manually use multiple sets of equipment to prepare mud, transport the mud to the construction site, and input it into the hole, resulting in low construction efficiency and waste of manpower; in the mud treatment process, the mud is constantly circulated, and there is a lack of mud readjustment, resulting in the mud performance indicators not being guaranteed at each stage, and the circulation, sedimentation and purification effect of the mud is poor. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides a high-efficiency mud circulation device for a horizontal directional drilling rig.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a high-efficiency mud circulation device for horizontal directional drilling rig, which is erected in front of the construction surface and includes a frame body, a drill rod, a drainage and collection component, a flow control and reinforcement component, a mixing and distributing component and a mixing chamber. The drill rod is erected on the frame body, and the front end of the drill rod is equipped with a drill bit, and a hole is drilled on the construction surface by the drill bit. The drainage and collection component and the flow control and reinforcement component are both mounted on the outside of the drill rod, and the flow control and reinforcement component is located between the drill bit and the drainage and collection component. The front end of the drill rod, the drill bit, the front end of the drainage and collection component and the flow control and reinforcement component are all located in the borehole. The cement pump, the mixing and distributing component and the mixing chamber are assembled on the frame body. The inside of the drill rod and the drill bit are both provided with a diversion cavity. The drainage and collection component, the mixing and distributing component, the mixing chamber, the cement pump, the drill rod and the drill bit are connected in sequence.

[0006] The guide cavity in the drill pipe axially penetrates the drill pipe;

[0007] A portion of the flow guide cavity in the drill bit is axially arranged to communicate with the flow guide cavity in the drill rod, and another portion of the flow guide cavity in the drill bit is radially arranged to communicate with the drill hole.

[0008] Furthermore, the drainage collection assembly includes a casing, a spiral kit, a drain pipe, a mounting seat, a transfer pipe, and a built-in filter screen. The casing is assembled on the frame body through the mounting seat, the casing is sleeved on the outside of the drill rod, and the front end of the casing extends into the borehole. The spiral kit is fixedly installed on the outer surface of the drill rod, and the spiral kit is located in the casing. The built-in filter screen is tubular, and the built-in filter screen is assembled on the inner side of the casing. The casing and the built-in filter screen are coaxial, and a gap is left between the two to form a closed sealing ring cavity. The transfer pipe is assembled on the outer end face of the casing, and the transfer pipe is connected to the pipe cavity inside the built-in filter screen. The drain pipe is assembled on the outer wall of the casing, and the drain pipe is connected to the sealing ring cavity. The transfer pipe is connected to the mixing assembly.

[0009] Furthermore, the drainage collection assembly also includes a sealing seat and a stop ring. The sealing seat and the stop ring are both sleeved on the outside of the casing, and the sealing seat is fixed on the construction surface. The stop ring is inserted at the entrance of the borehole to fill the gap between the casing and the borehole.

[0010] Furthermore, one end of the mounting seat is fixedly connected to the frame body, and the other end of the mounting seat is fixedly connected to the sleeve. The mounting seat is a lifting structure, that is, the sleeve can be lifted and assembled on the frame body through the mounting seat.

[0011] Furthermore, the flow control reinforcement assembly, flow sleeve, lifting frame plate, drive disc, isolation plate, and transfer rod are described. The flow sleeve is sleeved on the drill pipe, and the flow sleeve is located on the front side of the drainage and collection assembly. A plurality of isolation plates are hinged on the front end surface of the flow sleeve. The outer wall of the flow sleeve is equipped with a plurality of driving discs and a plurality of telescopic adjustment brackets. The distribution positions of the driving discs and the telescopic adjustment brackets correspond to the isolation plates one by one. The outer walls of the isolation plates are hinged with transfer rods. The driving disc is equipped with a lifting frame plate. The lifting frame plate and the transfer rod are hinged to the telescopic adjustment brackets respectively.

[0012] The plurality of isolation plates are distributed in a centrally symmetrical manner, an elastic plate is fixedly installed between every two adjacent isolation plates, and the plurality of isolation plates and the plurality of elastic plates are alternately formed into a conical cylinder.

[0013] Furthermore, the mixing and dispensing assembly includes a feed bin, an extrusion seat, a grinding disc, a water inlet pipe, a stirring roller, and a discharge pipe. The feed bin is mounted on the main body of the frame. A grinding disc is mounted in the middle of the feed bin. The grinding disc is a ring with an inverted cone-shaped inner wall. The extrusion seat is mounted in the feed bin, and the extrusion seat is located directly above the grinding disc. The outer wall of the extrusion seat matches the inner wall of the grinding disc. A stirring roller is mounted at the bottom of the inner cavity of the feed bin, and a water inlet pipe and a discharge pipe are provided on the side wall of the feed bin. The water inlet pipe is connected to the drainage collection assembly, and the discharge pipe is connected to the mixing bin.

[0014] Furthermore, two external pipes are radially provided on the outer wall of the mixing bin, a grouting pipe is installed inside the mixing bin, and a discharge pump is provided outside the mixing bin, which is installed on the frame body, and the input end of the discharge pump is connected with the external barrel, and the output end of the discharge pump is connected with the grouting pipe via an external pipe, and the other external pipe is connected with the deployment mixing component, and a limiting plug and an inner ring seat are respectively provided at both ends of the mixing bin, the limiting plug is sealed with the inner wall of the mixing bin and can slide axially, the limiting plug is fixedly connected to the hydraulic telescopic rod located outside the mixing bin, and an output port located at the inner ring seat is opened in the center of the end face of the mixing bin, and the output port is connected with the cement pump through a pipeline.

[0015] Furthermore, the telescopic adjustment bracket includes a pneumatic part, an inner sealing shaft, and a spring telescopic rod. The pneumatic part is fixedly installed on the flow sleeve, and the pneumatic part is connected to the external air pump. The inner sealing shaft is assembled inside the pneumatic part. The outer end of the inner sealing shaft is fixedly installed with a spring telescopic rod, and the outer end of the inner sealing shaft is hinged to the transmission rod, and the end of the spring telescopic rod is hinged to the lifting frame plate.

[0016] The beneficial effects of using the present invention are:

[0017] 1. The drainage and collection assembly and the flow control and reinforcement assembly of the present invention cooperate to preferentially recover the drilling mud before it overflows from the top of the borehole, thereby preventing it from accumulating in the borehole for a long time.

[0018] 2. The mixing component can fully crush and re-mix the recovered drilling mud to ensure the mud consistency and quality;

[0019] 3. The mixing chamber adjusts the composition and consistency of the mud by introducing new mud, thus avoiding the problem of mud quality degradation caused by repeated self-circulation of mud;

[0020] 4. The flow control and reinforcement component effectively controls the thickness and uniformity of the mud on the inner wall of the borehole. The pressure generated during the scraping of excess mud can radially reinforce the mud in the borehole, thereby improving the wall protection effect of the mud in the borehole. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 Schematic diagram of the structure of the drainage and collection assembly in the present invention;

[0023] Figure 3 It is a schematic diagram of the structure of the mixing component in the present invention;

[0024] Figure 4 This is a schematic structural diagram of the flow control reinforcement assembly of the present invention;

[0025] Figure 5 It is a structural schematic diagram of the adjustment bracket in the present invention.

[0026] The reference numerals include: a-construction surface; b-drilling; 1-frame body; 2-drill rod; 21-drill bit; 22-cement pump; 23-diversion chamber; 3-drainage collection assembly; 31-casing; 32-screw kit; 33-drain pipe; 34-mounting seat; 35-transfer pipe; 36-built-in filter screen; 37-sealing seat; 38-stop ring; 4-flow control reinforcement assembly; 41-flow sleeve; 42-lifting frame plate; 43-drive disc; 4 4-Isolation plate; 45-Transfer rod; 5-Mixing component; 51-Feeding bin; 52-Extrusion seat; 53-Grinding disc; 54-Water inlet pipe; 55-Stirring roller; 56-Discharge pipe; 6-Mixing bin; 61-Discharge pump; 62-External pipe; 63-Groutine pipe; 64-Limiting plug; 65-Inner ring seat; 66-Hydraulic telescopic rod; 7-Telescopic adjustment bracket; 71-Pneumatic component; 72-Inner sealing shaft; 73-Spring telescopic rod. DETAILED DESCRIPTION

[0027] The present invention is described in detail below with reference to the accompanying drawings.

[0028] Reference Figure 1-Figure 5 , a high-efficiency mud circulation device for horizontal directional drilling rig, which is erected in front of the construction surface a, includes a frame body 1, a drill rod 2, a drainage and collecting component 3, a flow control and reinforcement component 4, a mixing and distributing component 5 and a mixing chamber 6. The drill rod 2 is erected on the frame body 1, and the front end of the drill rod 2 is equipped with a drill bit 21, and a borehole b is drilled on the construction surface by the drill bit 21. The drainage and collecting component 3 and the flow control and reinforcement component 4 are both mounted on the outside of the drill rod 2, and the flow control and reinforcement component 4 is located between the drill bit 21 and the drainage and collecting component 3. The front end of the drill rod 2, the drill bit 21, the front end of the drainage and collecting component 3 and the flow control and reinforcement component 4 are all located in the borehole b. The cement pump 22, the mixing and distributing component 5 and the mixing chamber 6 are assembled on the frame body 1. The interior of the drill rod 2 and the drill bit 21 are both provided with a guide chamber 23. The drainage and collecting component 3, the mixing and distributing component 5, the mixing chamber 6, the cement pump 22, the drill rod 2 and the drill bit 21 are connected in sequence;

[0029] The flow guide cavity 23 in the drill rod 2 axially penetrates the drill rod 2;

[0030] A portion of the guide cavity 23 in the drill bit 21 is axially connected to the guide cavity 23 in the drill rod 2, and another portion of the guide cavity 23 in the drill bit 21 is radially connected to the borehole b.

[0031] The mixing bin 6 is a three-way structure, with two input ends connected to the mixing and dispensing assembly 5 and the external feeding mechanism respectively, and the output end connected to the cement pump 22;

[0032] Borehole b-flow control and reinforcement component 4-drainage and collection component 3-blending and mixing component 5-mixing bin 6-cement pump 22-drill rod 2-drill bit 21-borehole b constitutes a mud circulation loop. The drill bit 21 produces drilling cuttings during drilling in the borehole b. The drilling cuttings and waste liquid are collected by the flow control and reinforcement component 4 and the drainage and collection component 3 and introduced into the blending and mixing component 5. After being processed by the blending and mixing component 5, they are discharged into the mixing bin 6, and further mixed with the material input by the external feeding mechanism in the mixing bin 6. The treated mud is output by the cement pump 22, flows through the guide cavity in the drill rod 2 and the drill bit 21, and is re-injected into the borehole b to complete the cycle.

[0033] The drainage collection assembly 3 includes a sleeve 31, a spiral kit 32, a drain pipe 33, a mounting seat 34, a transfer pipe 35, and a built-in filter 36. The sleeve 31 is assembled on the frame body 1 through the mounting seat 34. The sleeve 31 is sleeved on the outside of the drill rod 2, and the front end of the sleeve 31 extends into the borehole b. The spiral kit 32 is fixedly installed on the outer surface of the drill rod 2, and the spiral kit 32 is located in the sleeve 31. The built-in filter 36 is tubular and assembled on the inner side of the sleeve 31. The sleeve 31 and the built-in filter 36 are coaxial, and a gap is left between the two to form a closed sealing ring cavity. The transfer pipe 35 is assembled on the outer end face of the sleeve 31, and the transfer pipe 35 is connected to the pipe cavity inside the built-in filter 36. The drain pipe 33 is assembled on the outer wall of the sleeve 31, and the drain pipe 33 is connected to the sealing ring cavity. The transfer pipe 35 is connected to the mixing and dispensing assembly 5.

[0034] The drainage collection assembly 3 also includes a sealing seat 37 and a stop ring 38. The sealing seat 37 and the stop ring 38 are both sleeved on the outside of the casing 31, and the sealing seat 37 is fixed on the construction surface a. The stop ring 38 is inserted at the entrance of the borehole b to fill the gap between the casing 31 and the borehole b.

[0035] One end of the mounting seat 34 is fixedly connected to the frame body 1 , and the other end of the mounting seat 34 is fixedly connected to the sleeve 31 . The mounting seat 34 is a lifting structure, that is, the sleeve 31 can be lifted and assembled on the frame body 1 through the mounting seat 34 .

[0036] The flow control reinforcement component 4, the flow sleeve 41, the lifting frame plate 42, the driving disk 43, the isolation plate 44, and the transfer rod 45, the flow sleeve 41 is sleeved on the drill pipe 2, and the flow sleeve 41 is located on the front side of the drainage collection component 3, a plurality of isolation plates 44 are hinged on the front end surface of the flow sleeve 41, and the outer wall of the flow sleeve 41 is equipped with a plurality of driving disks 43 and a plurality of telescopic adjustment brackets 7, the distribution positions of the driving disks 43 and the telescopic adjustment brackets 7 correspond one to one with the isolation plates 44, and the outer walls of the isolation plates 44 are hinged with transfer rods 45, the driving disk 43 is equipped with a lifting frame plate 42, and the lifting frame plate 42 and the transfer rod 45 are respectively hinged to the telescopic adjustment bracket 7;

[0037] The plurality of isolation plates 44 are distributed in a centrally symmetrical manner. An elastic plate is fixedly installed between every two adjacent isolation plates 44 . The plurality of isolation plates 44 and the plurality of elastic plates are alternately formed into a conical cylinder.

[0038] The outside of the conical cylinder is sleeved with a sliding cover, which fits tightly with the conical cylinder to achieve a sealing effect.

[0039] The mixing and dispensing assembly 5 includes a feed bin 51, an extrusion seat 52, a grinding disc 53, a water inlet pipe 54, a stirring roller 55, and a discharge pipe 56. The feed bin 51 is mounted on the frame body 1. The middle part of the feed bin 51 is equipped with a grinding disc 53. The grinding disc 53 is a ring with an inverted cone-shaped inner wall. The extrusion seat 52 is mounted in the feed bin 51, and the extrusion seat 52 is located directly above the grinding disc 53. The outer wall of the extrusion seat 52 matches the inner wall of the grinding disc 53. The bottom of the inner cavity of the feed bin 51 is equipped with a stirring roller 55, and the side wall of the feed bin 51 is provided with a water inlet pipe 54 and a discharge pipe 56. The water inlet pipe 54 is connected to the drain pipe 33, and the discharge pipe 56 is connected to the mixing bin 6.

[0040] Two external pipes 62 are radially provided on the outer wall of the mixing bin 6, a grouting pipe 63 is installed inside the mixing bin 6, and a discharge pump 61 is provided outside the mixing bin 6. The discharge pump 61 is installed on the frame body 1, and the input end of the discharge pump 61 is connected with the external barrel, and the output end of the discharge pump 61 is connected with the grouting pipe 63 via an external pipe 62, and the other external pipe 62 is connected with the deployment mixing component 5. A limiting plug 64 and an inner ring seat 65 are respectively provided at both ends of the mixing bin 6. The limiting plug 64 is sealed with the inner wall of the mixing bin 6 and can slide axially. The limiting plug 64 is fixedly connected to the hydraulic telescopic rod 66 located outside the mixing bin 6, and an output port located at the inner ring seat 65 is opened in the center of the end face of the mixing bin 6, and the output port is connected with the cement pump 22 through a pipeline.

[0041] Preferably, a plurality of through holes are arranged on the grouting pipe 63 to allow the newly added mud to be mixed into the prepared mud more evenly.

[0042] The telescopic adjustment bracket 7 includes a pneumatic component 71, an inner sealing shaft 72, and a spring telescopic rod 73. The pneumatic component 71 is fixedly installed on the flow sleeve 41, and the pneumatic component 71 is connected to the external air pump. The inner sealing shaft 72 is assembled inside the pneumatic component 71. The outer end of the inner sealing shaft 72 is fixedly installed with a spring telescopic rod 73, and the outer end of the inner sealing shaft 72 is hinged to the transmission rod 45. The end of the spring telescopic rod 73 is hinged to the lifting frame plate 42.

[0043] Before the operation of the equipment, the staff adjusts the opening angle of the isolation plate 44 of the flow control reinforcement component 4 according to the preset size of the reinforced borehole b, thereby controlling the thickness of the mud in the borehole b to achieve the best wall protection effect.

[0044] When the device is in operation, the drill rod 2 performs horizontal drilling through the drill bit 21, and the diversion cavity 23 discharges the drilling mud through the drill bit 21 under the action of positive circulation at high pressure;

[0045] During the mud discharge process, the flow control and reinforcement component 4 scrapes away the excess mud and recovers it together with the drill cuttings into the drainage and collection component 3. The spiral kit 32 can guide the drilling mud (i.e., the recovered mud, containing impurities such as drill cuttings and cooling water) into the casing 31. The drilling mud is subjected to a simple separation treatment through the built-in filter 36 in the casing 31 (to improve the viscosity of the output drilling mud and facilitate the subsequent mixing of the mud). The water is output through the drain pipe 33, part of which is directly discharged and part is introduced into the mixing and blending component 5. The drilling mud is introduced into the mixing and blending component 5 through the transfer pipe 35.

[0046] The drilling mud is fed from the top of the feed bin 51 and ground by the extrusion seat 52 and the grinding disc 53 to crush the large particles of impurities contained in the drilling mud. The staff adjusts the water injection amount according to the consistency of the drilling mud after grinding. The drilling mud and water are mixed to form a prepared mud, which is then injected into the mixing bin 6.

[0047] The external material barrel injects the newly added mud into the mixing chamber 6, the prepared mud and the newly added mud are mixed in the mixing chamber 6, and are drained by the cement pump 22 and injected into the guide cavity 23 of the drill pipe 2 to form a mud circulation.

[0048] The mixing ratio of the prepared mud and the newly added mud is set according to the composition and viscosity of the prepared mud, and it is sufficient to ensure the consistency and quality of the mud. The usual ratio is 3:1.

[0049] The above content is only a preferred embodiment of the present invention. For ordinary technicians in this field, according to the concept of the present invention, many changes can be made in the specific implementation method and application scope. As long as these changes do not deviate from the concept of the present invention, they all fall within the scope of protection of the present invention.

Claims

1. A high-efficiency mud circulation device for horizontal directional drilling rig, installed in front of the construction face, characterized by: The machine comprises a frame body, a drill rod, a drainage and collection component, a flow control and reinforcement component, a mixing and dispensing component and a mixing chamber. The drill rod is mounted on the frame body, and a drill bit is installed at the front end of the drill rod, and a hole is drilled on the construction surface by the drill bit. The drainage and collection component and the flow control and reinforcement component are both mounted on the outside of the drill rod, and the flow control and reinforcement component is located between the drill bit and the drainage and collection component. The front end of the drill rod, the drill bit, the front end of the drainage and collection component and the flow control and reinforcement component are all located in the borehole. The cement pump, the mixing and dispensing component and the mixing chamber are mounted on the frame body. A flow guide cavity is provided inside the drill rod and the drill bit. The drainage and collection component, the mixing and dispensing component, the mixing chamber, the cement pump, the drill rod and the drill bit are connected in sequence. The guide cavity in the drill pipe axially penetrates the drill pipe; A portion of the guide cavity in the drill bit is axially connected to the guide cavity in the drill rod, and another portion of the guide cavity in the drill bit is radially connected to the drill hole. The drainage collection assembly includes a casing, a spiral kit, a drain pipe, a mounting seat, a transfer pipe, and a built-in filter screen. The casing is assembled on the frame body through the mounting seat. The casing is sleeved on the outside of the drill pipe, and the front end of the casing extends into the drill hole. The spiral kit is fixedly mounted on the outer surface of the drill pipe, and the spiral kit is located in the casing. The built-in filter screen is tubular and assembled on the inner side of the casing. The casing and the built-in filter screen are coaxial, and a gap is left between the two to form a closed sealing ring cavity. The transfer pipe is assembled on the outer end face of the casing, and the transfer pipe is connected to the pipe cavity inside the built-in filter screen. The drain pipe is assembled on the outer wall of the casing, and the drain pipe is connected to the sealing ring cavity. The transfer pipe is connected to the mixing and dispensing assembly. The flow control reinforcement assembly, flow sleeve, lifting frame plate, drive disc, isolation plate, and transfer rod are described. The flow sleeve is sleeved on the drill pipe, and the flow sleeve is located on the front side of the drainage and collection assembly. A plurality of isolation plates are hinged on the front end surface of the flow sleeve. A plurality of driving discs and a plurality of telescopic adjustment brackets are installed on the outer side wall of the flow sleeve. The distribution positions of the driving discs and the telescopic adjustment brackets correspond to the isolation plates one by one. The outer side walls of the isolation plates are hinged with transfer rods. The driving disc is equipped with a lifting frame plate. The lifting frame plate and the transfer rod are hinged to the telescopic adjustment brackets respectively. The plurality of isolation plates are distributed in a centrally symmetrical manner, an elastic plate is fixedly installed between every two adjacent isolation plates, and the plurality of isolation plates and the plurality of elastic plates are alternately formed into a conical cylinder.

2. The high-efficiency mud circulation device for horizontal directional drilling according to claim 1, characterized in that: The drainage collection assembly also includes a sealing seat and a stop ring. The sealing seat and the stop ring are both sleeved on the outside of the casing, and the sealing seat is fixed on the construction surface. The stop ring is inserted at the entrance of the borehole to fill the gap between the casing and the borehole.

3. The high-efficiency mud circulation device for horizontal directional drilling according to claim 1, characterized in that: One end of the mounting seat is fixedly connected to the frame body, and the other end of the mounting seat is fixedly connected to the sleeve. The mounting seat is a lifting structure, that is, the sleeve can be lifted and assembled on the frame body through the mounting seat.

4. The high-efficiency mud circulation device for horizontal directional drilling according to claim 1, characterized in that: The mixing and dispensing assembly includes a feed bin, an extrusion seat, a grinding disc, a water inlet pipe, a stirring roller, and a discharge pipe. The feed bin is mounted on the main body of the frame. The middle part of the feed bin is equipped with a grinding disc, and the grinding disc is a ring with an inverted cone-shaped inner wall. The extrusion seat is mounted in the feed bin, and the extrusion seat is located directly above the grinding disc. The outer wall of the extrusion seat matches the inner wall of the grinding disc. The bottom of the inner cavity of the feed bin is equipped with a stirring roller, and the side wall of the feed bin is provided with a water inlet pipe and a discharge pipe. The water inlet pipe is connected to the drainage collection assembly, and the discharge pipe is connected to the mixing bin.

5. The high-efficiency mud circulation device for horizontal directional drilling according to claim 1, characterized in that: Two external pipes are radially arranged on the outer wall of the mixing bin, a grouting pipe is installed inside the mixing bin, and a discharge pump is provided outside the mixing bin, which is installed on the frame body, and the input end of the discharge pump is connected with the external barrel, and the output end of the discharge pump is connected with the grouting pipe via an external pipe, and the other external pipe is connected with the deployment mixing component, and a limit plug and an inner ring seat are respectively provided at both ends of the mixing bin, the limit plug is sealed with the inner wall of the mixing bin and can slide axially, the limit plug is fixedly connected to the hydraulic telescopic rod located outside the mixing bin, and an output port located at the inner ring seat is opened in the center of the end face of the mixing bin, and the output port is connected with the cement pump through a pipeline.

6. The high-efficiency mud circulation device for horizontal directional drilling according to claim 1, characterized in that: The telescopic adjustment bracket includes a pneumatic part, an inner sealing shaft, and a spring telescopic rod. The pneumatic part is fixedly installed on the flow sleeve, and the pneumatic part is connected to an external air pump. The inner sealing shaft is assembled inside the pneumatic part. The outer end of the inner sealing shaft is fixedly installed with a spring telescopic rod, and the outer end of the inner sealing shaft is hinged to the transmission rod, and the end of the spring telescopic rod is hinged to the lifting frame plate.

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