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CN-122014109-A - Modularized horizontal directional drilling system for land wind power line

CN122014109ACN 122014109 ACN122014109 ACN 122014109ACN-122014109-A

Abstract

The invention discloses a modularized horizontal directional drilling system for a land wind power line, and belongs to the technical field of horizontal directional drilling. The system comprises a composite drill bit assembly, an expandable drill rod system, a steering structure, a guiding system and a central controller. Through dynamic adjustment of the rotation speed of the drill bit, slurry injection and steering amount, efficient rock breaking and wall protecting, high-precision track control and intelligent construction under complex geology are realized, the problems of poor adaptability and low precision of the traditional technology are solved, and the method is suitable for long-distance hole forming of wind power lines penetrating through obstacles.

Inventors

  • ZHANG YUNJIE

Assignees

  • 湖北省天顺零碳技术有限公司

Dates

Publication Date
20260512
Application Date
20260109

Claims (10)

  1. 1. A modular horizontal directional drilling system for land wind power lines, comprising: The combined type drill bit assembly (1) comprises a tri-cone rotatable drill bit unit (11) and three groups of symmetrical slurry spray head groups (12), wherein the tri-cone rotatable drill bit unit (11) comprises three cone drill bits (111) symmetrically arranged along the circumferential direction by 120 degrees, each cone drill bit (111) is movably connected with a drill bit body (113) through a miniature rotating shaft (112) so as to realize autorotation, hard alloy teeth (114) are arranged at the head part of each cone drill bit (111), the three groups of symmetrical slurry spray head groups (12) are arranged at intervals with the cone drill bit (111) along the axial direction of the drill bit body (113) and are integrated in the drill bit body (113), each group of slurry spray head groups (12) comprises a high-pressure nozzle (121), and a slurry pipeline (122) penetrates through a drill rod standard joint (21) and is communicated with the high-pressure nozzle (121); The expandable drill rod system (2) comprises a plurality of drill rod standard joints (21) which are detachably connected at the first position, wherein a universal joint (22) is arranged at the end part of each drill rod standard joint (21), and the adjacent drill rod standard joints (21) realize relative rotation through the universal joints (22); the steering structure (3) comprises three electric telescopic rods (31) symmetrically arranged along the circumferential direction of the drill rod by 120 degrees, two ends of each electric telescopic rod (31) are respectively hinged to preset hinging positions on the circumference of an adjacent standard section (21) of the drill rod, and the drill bit body (113) is driven to deflect at a small angle through cooperative telescopic driving; A guiding system (4) comprising a magnetic field emission probe (41) fixed on the outer side of the drill bit body (113), and a magnetic field receiver (42) arranged on the ground, and used for receiving magnetic field signals and realizing track positioning; The system comprises a central controller (5), an integrated cooperative control algorithm, a composite drill bit assembly (1), an expandable drill rod system (2), a steering structure (3), a guiding system (4) and a geological sensor (52), wherein the central controller is in communication connection with the composite drill bit assembly, the expandable drill rod system, the steering structure (3), the guiding system (4) and the geological sensor (52), the rotation speed of a conical drill bit (111), the injection mode of a slurry spray head group (12) and the expansion and contraction amount of the steering structure (3) are dynamically adjusted according to geological parameters, and the geological sensor (52) is arranged on the outer wall of a drill rod standard section (21) and is used for acquiring formation resistivity and hardness data in real time and transmitting the data to the central controller (5).
  2. 2. The modularized horizontal directional drilling system for the land wind power line according to claim 1, wherein the cemented carbide teeth (114) of the head part of the conical drill bit (111) are arranged in a gradient way, comprise high-density small-size teeth positioned at the front end of a cutting edge and medium-low-density large-size teeth positioned at the rear end of the cutting edge, the inclination angle of the cutting edge is 15 degrees to 30 degrees, the miniature rotating shaft (112) allows the conical drill bit (111) to deflect in a self-adaptive way within +/-10 degrees, and the spraying direction of the high-pressure nozzle (121) forms an included angle of 30 degrees to 45 degrees with the cutting direction of the conical drill bit (111) and is circumferentially arranged along the drill bit body (113) for injecting wall protection slurry into the hole wall.
  3. 3. The modularized horizontal directional drilling system for the land wind power line according to claim 1, wherein the universal joint (22) is a ball cage universal joint, an inner ring of the universal joint is fixedly connected with the end part of a standard drill rod joint (21) through a bearing seat (221), an outer ring of the universal joint is fixedly connected with the end part of an adjacent standard drill rod joint (21), torque transmission and angle compensation are achieved through steel balls in the ball cage, and a dust cover (222) is arranged on the outer side of the universal joint (22).
  4. 4. The modularized horizontal directional drilling system for the land wind power line according to claim 1, wherein the electric telescopic rod (31) of the steering structure (3) comprises a cylinder body (311), a piston rod (312) and a hinge piece (313), the end part of the cylinder body (311) is hinged with a second hinge seat (315) on the circumference of a drill rod standard joint (21) through a first hinge seat (314), and the end part of the piston rod (312) is hinged with a fourth hinge seat (317) on the side surface of a universal joint (22) through a third hinge seat (316).
  5. 5. The modularized horizontal directional drilling system for the land wind power line according to claim 1, wherein four magnetic field emission probes (41) are distributed outside the drill bit body (113) in a rectangular or annular shape, the included angle between the axes of the probes and the axes of the drill bit body (113) is 0-5 degrees, and the magnetic field receiver (42) comprises at least four magnetic induction elements and transmits positioning data to the central controller (5).
  6. 6. The modularized horizontal directional drilling system for the land wind power line according to claim 1 is characterized in that three electric telescopic rods (31) of the steering structure (3) are controlled by a central controller (5) to realize a telescopic cooperative action, wherein one electric telescopic rod (31) stretches, the other two electric telescopic rods (31) synchronously shrink to generate a resultant moment around the axis of a drill rod, a drill bit body (113) is driven to deflect by 0.5-3 degrees, a single deviation correcting angle is 0.5-2 degrees, and a displacement sensor and a force sensor are arranged in the electric telescopic rods (31) to feed back the telescopic quantity and the load state in real time.
  7. 7. The modularized horizontal directional drilling system for the land wind power line according to claim 1, wherein a magnetic field transmitting probe (41) of the guiding system (4) transmits a low-frequency alternating magnetic field, a magnetic field receiver (42) calculates probe coordinates through a triangulation method, positioning accuracy is +/-2 cm, and when track deviation exceeds a set threshold value, a central controller (5) triggers an alarm and generates a deviation rectifying instruction.
  8. 8. The modularized horizontal directional drilling system for the land wind power line according to claim 1, wherein the central controller (5) integrates a geological parameter database (51) and stores drill bit rotating speed ranges, slurry pressure thresholds and steering sensitivity parameters corresponding to different geological types, and the geological sensor (52) is arranged on the outer wall of a standard section (21) of a drill rod and used for acquiring formation resistivity and hardness data in real time and transmitting the data to the central controller (5).
  9. 9. A land wind power line horizontal directional drilling construction method based on the system of any one of claims 1-8, comprising the steps of: step S1, geological investigation and parameter input, wherein a geological sensor (52) is used for collecting target stratum parameters, and a central controller (5) calls a geological parameter database (51) to match initial parameters; Step S2, dynamically adjusting operation parameters, and optimizing the rotation speed of the cone drill bit (111), the high-pressure injection proportion and the flow of the slurry spray head group (12) by the central controller (5) through a cooperative control algorithm according to real-time geological data; s3, track monitoring and deviation correcting, wherein a magnetic field receiver (42) feeds back the position of the drill bit in real time, and when track deviation is detected, a central controller (5) controls an electric telescopic rod (31) of a steering structure (3) to execute a stretching and shrinking action so as to drive a drill bit body (113) to slightly deflect and correct the deviation; S4, expanding a modularized drill rod, sequentially connecting drill rod standard joints (21) according to drilling depth, and adapting to terrain fluctuation through universal joints (22) until reaching a target position; And S5, performing hole forming post-treatment, stopping the rotation of the drill bit, injecting solidified slurry through the slurry spray head group (12), and recovering the drill rod system after the hole wall is stable.
  10. 10. The method according to claim 9, wherein in step S3, the correction process includes ① the magnetic field receiver (42) calculating the lateral and angular deviations of the current trajectory from the target trajectory; ② The central controller (5) starts the steering structure (3) when judging that the transverse deviation is larger than a transverse deviation threshold or the angle deviation is larger than an angle deviation threshold; ③ The electric telescopic rod (31) acts in a stretching and shrinking mode, the single deviation correcting angle is not more than 2 degrees, and the repeated iteration is carried out until the deviation reaches the standard; ④ After the correction is completed, the electric telescopic rod (31) is reset and maintains the pretightening force.

Description

Modularized horizontal directional drilling system for land wind power line Technical Field The invention relates to the technical field of horizontal directional drilling, in particular to a modularized horizontal directional drilling system for a land wind power line. Background With the rapid development of wind power industry on landing, the transmission line needs to pass through complex barriers such as highways, rivers, farmlands, buildings and the like, and the horizontal directional drilling technology becomes a key means for laying the wind power line pipeline due to small disturbance to the ground surface and high construction efficiency. However, the existing horizontal directional drilling system has obvious limitations under complex geological conditions (such as soft soil, sand and pebble layers and weathered rock interbedded), the capability of breaking rock and protecting walls of the drill bit is insufficient, the traditional single cone or PDC drill bit is low in cutting efficiency and easy to abrade in hard rock stratum, slurry injection is mostly in axial direct injection, the wall protecting slurry is difficult to uniformly cover the hole wall and easy to collapse and shrink, the drill rod system is poor in terrain adaptability, the conventional drill rod system is in rigid connection and cannot adapt to fluctuating terrains, torque transmission loss is large during long-distance drilling, stuck drilling is easy to occur, steering control precision is low, the existing steering mechanism is mostly dependent on a single hydraulic oil cylinder or a mechanical elbow, deflection angle is large (usually more than 5 degrees) and response lag is difficult to realize small track adjustment, accumulated errors are obvious during long-distance drilling, the traditional steering and rectifying capability is weak, the traditional steering system is mostly in wired measurement or single-point magnetic field positioning, positioning precision is low (error is more than 5 cm), real-time rectifying mechanism is lacked, rapid recovery is difficult to occur after track deflection is lacked, intelligent cooperative control is lacked, operating parameters (drill bit rotating speed, pressure and steering sensitivity) are mostly dependent on manual setting, the serious dynamic adjustment is difficult to cause low in drilling efficiency and equipment loss is difficult to be caused under complicated stratum experience. Therefore, a modularized horizontal directional drilling system which is suitable for complex geology, has high-precision track control and intelligent cooperative adjustment is needed to meet the requirements of land wind power line construction on long-distance, high-precision and high-efficiency hole forming. Disclosure of Invention The invention aims to overcome the defects of the prior art and provide a modularized horizontal directional drilling system for a land wind power line. In order to achieve the technical aim, the core technical scheme of the invention is that the high-efficiency rock breaking and wall protection are realized through the composite drill bit assembly, the expandable drill rod system is suitable for terrains, the steering structure is precisely regulated and controlled, the track system is positioned in real time, and the intelligent cooperative control of the central controller is combined, so that the problem of wind power line drilling under complex geology is solved: The combined type drill bit assembly comprises a three-cone rotatable drill bit unit and three groups of symmetrical slurry spray head groups, wherein the three-cone rotatable drill bit unit comprises three cone drill bits symmetrically arranged along the circumferential direction by 120 degrees, each cone drill bit is movably connected with a drill bit body through a miniature rotating shaft so as to realize rotation, and hard alloy teeth are arranged on the head of each cone drill bit; The expandable drill rod system comprises a plurality of drill rod standard joints which are detachably connected at the first position, wherein the end part of each drill rod standard joint is provided with a universal joint, and the adjacent drill rod standard joints realize relative rotation through the universal joints; The steering structure comprises three electric telescopic rods symmetrically arranged along the circumferential direction of the drill rod by 120 degrees, two ends of each electric telescopic rod are respectively hinged to preset hinging positions on the circumferences of standard sections of adjacent drill rods, and the drill bit body is driven to deflect at a small angle through cooperative telescopic driving; The guiding system comprises a magnetic field emission probe fixed on the outer side of the drill bit body and a magnetic field receiver arranged on the ground, and is used for receiving magnetic field signals and realizing track positioning; The central controller is in communication co