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CN-121993036-A - Deep-buried composite broken stratum long-distance horizontal drilling device and operation method thereof

CN121993036ACN 121993036 ACN121993036 ACN 121993036ACN-121993036-A

Abstract

The invention discloses a deep-buried composite broken stratum long-distance horizontal drilling device and an operation method thereof, and relates to the technical field of horizontal drilling; the drilling rod assembly comprises a plurality of drilling rods which are connected end to end, a drill bit is connected to the drilling rod at the head through a connecting piece, and the drilling rod at the tail is driven by the drilling power part to rotate and move axially. According to the invention, the blocking rib is arranged in the drill rod, the drill rod is divided into the backflow cavity, the jet cavity and the V-shaped supporting frame II, so that the problems of water source jet flow and slurry backflow are solved, meanwhile, the water source after jet flow is filled in a gap between the drill rod and a well wall due to water pressure on the side wall of the drill rod to form a lubricating layer, and damping caused by contact friction between the drill rod and the well wall is prevented.

Inventors

  • LIU JIUCHUAN
  • LI BOWEN
  • WANG XUEHANG
  • PENG TIANLE
  • ZHANG LONG
  • QIN XI
  • WANG LI
  • SUN LIXIN
  • WANG HUA
  • ZHOU WEI
  • CHENG YONGDONG
  • ZHU CHANGYUAN
  • Fan Yannan
  • LU MINGXING
  • WEI CHUANLONG
  • YANG QIANG

Assignees

  • 中铁四局集团有限公司
  • 华北科技学院
  • 中检集团公信安全科技有限公司

Dates

Publication Date
20260508
Application Date
20260309

Claims (10)

  1. 1. A long-distance horizontal drilling device for deep buried composite broken stratum comprises a drill rod assembly (2) for horizontal drilling and a drilling power part (1) for driving the drill rod assembly (2) to rotate and axially move, and is characterized in that, The drill rod assembly (2) is formed by connecting a plurality of drill rods (3) end to end, the drill rod (3) positioned at the head is connected with a drill bit (6) through a connecting piece (5), and the drill rod (3) positioned at the tail is driven by the drilling power part (1) to rotate and move axially; the inner part of the drill rod (3) is provided with a barrier rib (10), the inner cavity of the drill rod (3) is divided into a backflow cavity (7) which is not communicated with each other and is used for backflow of slurry water and a jet cavity (8) which is used for water source jet, and meanwhile, the outer wall of the drill rod (3) is provided with a through hole (4) communicated with the backflow cavity (7); The drill bit (6) comprises a plurality of crushing teeth (14) arranged on one side of the connecting piece (5) and a plurality of spray holes (15) which are formed in the connecting piece (5) and are communicated with the jet flow cavity (8), and the connecting piece (5) plugs the backflow cavity (7) of the head drill rod (3).
  2. 2. The deep buried composite broken stratum long-distance horizontal drilling device according to claim 1, wherein one end of the drill rod (3) is provided with an external thread boss (11), the other end of the drill rod (3) is provided with an internal thread cylinder (12) matched with the external thread boss (11), two ends of the barrier rib (10) are respectively provided with a terrace protrusion and a terrace groove matched with each other, and the terrace protrusion and the terrace groove are matched and sealed through a terrace sealing surface (13).
  3. 3. The deep buried composite fractured stratum long-distance horizontal drilling device according to claim 1, wherein the drilling power part (1) comprises a base (16), a fixing piece (20) arranged at the front end of the base (16), a rotating piece (18) arranged above the base (16) and a supporting piece (19) arranged above the base (16) and positioned between the rotating piece (18) and the fixing piece (20).
  4. 4. A deep buried composite broken stratum long distance horizontal drilling device according to claim 3, characterized in that the top outer wall of the base (16) is fixed with a guide rail (21) through a bolt, the outer wall of the guide rail (21) is connected with a sliding table (17) in a sliding manner, and the top of the base (16) is provided with a linear driving piece for driving the sliding table (17) in a sliding manner.
  5. 5. The deep-buried composite broken stratum long-distance horizontal drilling device according to claim 3, wherein the rotating piece (18) comprises a threaded rotating table (27) which is rotatably connected to the inner wall of the sliding table (17) and is matched with an internal threaded cylinder (12) of the drill rod (3) on one side, and a fixing frame (26) which is rotatably connected to the other end of the threaded rotating table (27), the fixing frame (26) and the inner wall of the threaded rotating table (27) are both provided with a first connecting cavity (22) and a second connecting cavity (23) which are respectively communicated with the backflow cavity (7), backflow holes (25) which are respectively communicated with the first connecting cavity (22) and jet holes (24) which are respectively communicated with the second connecting cavity (23), the other ends of the backflow holes (25) are connected to a mud sedimentation tank, and the other ends of the jet holes (24) are connected with a water source through jet pumps.
  6. 6. The deep buried composite broken stratum long-distance horizontal drilling device according to claim 5, wherein a toothed ring (28) is fixed on the outer wall of the threaded rotary table (27), a rotary driving piece (30) is fixedly embedded on the inner wall of the sliding table (17), and a gear (29) meshed with the outer wall of the toothed ring (28) is fixed at the rotary output end of the rotary driving piece (30).
  7. 7. A deep buried composite fracture stratum long distance horizontal drilling device according to claim 3, characterized in that the fixing piece (20) comprises a fixing ring (31) fixed on the inner wall of the base (16) and two sliding rings (34) connected with the outer wall of the fixing ring (31) in a sliding mode, one side of each sliding ring (34) is rotatably connected with a plurality of circular array connecting rods (33), the other end of each connecting rod (33) is rotatably connected with a clamping jaw (32), and the clamping jaw (32) is radially and slidably connected with the side wall of the fixing ring (31).
  8. 8. The deep buried composite fracture stratum long-distance horizontal drilling device according to claim 7, wherein a bidirectional telescopic rod (35) is fixedly embedded in the inner wall of the base (16), and two telescopic ends of the bidirectional telescopic rod (35) are respectively fixed on the side walls of the two sliding rings (34).
  9. 9. A deep buried composite fracture formation long distance horizontal drilling device according to claim 3, wherein the support member (19) comprises a first V-shaped support frame (36) and a second V-shaped support frame (9), the first V-shaped support frame (36) is fixed on the top outer wall of the base (16), and the second V-shaped support frame (9) is fixed on the top outer wall of the sliding table (17).
  10. 10. The operation method of the deep buried composite broken stratum long-distance horizontal drilling device is characterized by comprising the following steps of: S1, connecting a drill rod (3) with a threaded rotary table (27), driving the drill rod (3) to rotate and linearly move through a linear driving piece and a rotary driving piece (30), and performing horizontal drilling, wherein the horizontal drilling simultaneously starts a jet pump to jet; and S2, after the single drill rod (3) is drilled to the deepest position, separating the drill rod (3) from the threaded rotary table (27), adding a new drill rod (3) and connecting, and then continuing to execute S1 until the maximum drilling depth is reached.

Description

Deep-buried composite broken stratum long-distance horizontal drilling device and operation method thereof Technical Field The invention relates to the technical field of horizontal drilling, in particular to a deep-buried composite broken stratum long-distance horizontal drilling device and an operation method thereof. Background The non-excavation technology, in particular the horizontal directional drilling technology, has become the preferred construction method for crossing obstacles such as highways, railways, rivers, buildings, historical protection areas and the like due to the remarkable advantages of small influence on ground traffic, environment and buildings, high construction efficiency and the like. The method has wide application fields, such as pipeline laying, grouting reconstruction of a water-bearing layer of a coal mine roof and a bottom plate and water burst plugging of a mine, pre-grouting reinforcement of broken surrounding rocks of a deep-buried tunnel (hole), and is used for laying pipelines such as petroleum, natural gas, water supply, drainage and the like, and sleeves such as electric power, communication, optical cables and the like. In the prior art, the drill rod of the horizontal directional drill is a hollow drill rod, in the process of directional drilling, a water spraying hole is formed in the position of a drill bit, high-pressure water is sprayed out to dissolve mud, so that the drilling efficiency is increased, meanwhile, the dissolved mud water flows back along the end part of the drill bit and is conveyed to a mud sedimentation tank for sedimentation, and the water after sedimentation is conveyed to the drilling well again, so that water flow circulation is realized. The prior art has the defects that when drilling is carried out, the side wall of the drill rod is in contact with the well wall at any time, friction force is generated by the contact, and the friction force can prevent the drill rod from rotating and going deep, so that the drilling efficiency is low, and the load is high. Disclosure of Invention The invention aims to solve the defects in the prior art, and provides a deep-buried composite broken stratum long-distance horizontal drilling device and an operation method thereof. In order to achieve the above purpose, the present invention adopts the following technical scheme: A deep buried composite broken stratum long-distance horizontal drilling device comprises a drill rod assembly for horizontal drilling and a drilling power part for driving the drill rod assembly to rotate and axially move; The drill rod assembly is formed by connecting a plurality of drill rods end to end, the drill rod positioned at the head is connected with a drill bit through a connecting piece, and the drill rod positioned at the tail is driven by the rotation and axial movement of a drilling power part; The inner cavity of the drill rod is divided into a backflow cavity which is not communicated with each other and used for backflow of slurry water and a jet cavity used for water source jet flow by the barrier ribs, and meanwhile, the outer wall of the drill rod is provided with through holes communicated with the backflow cavity; the drill bit comprises a plurality of crushing teeth arranged on one side of the connecting piece and a plurality of spray holes which are formed in the connecting piece and communicated with the jet flow cavity, and the connecting piece plugs the backflow cavity of the head drill rod. Preferably, one end of the drill rod is provided with an external thread boss, the other end of the drill rod is provided with an internal thread cylinder matched with the external thread boss, two ends of the barrier rib are respectively provided with a terrace protrusion and a terrace groove which are matched with each other, and the terrace protrusion and the terrace groove are matched and sealed through a terrace sealing surface. The drilling power part comprises a base, a fixing piece arranged at the front end of the base, a rotating piece arranged above the base and a supporting piece arranged above the base and positioned between the rotating piece and the fixing piece. On the basis of the scheme, a guide rail is fixed on the outer wall of the top of the base through bolts, a sliding table is connected to the outer wall of the guide rail in a sliding mode, and a linear driving piece for driving the sliding table in a sliding mode is arranged on the top of the base. The rotating piece comprises a threaded rotating table and a fixing frame, wherein the threaded rotating table is rotatably connected to the inner wall of the sliding table, one side of the threaded rotating table is matched with an internal threaded cylinder of a drill rod, the fixing frame is rotatably connected to the other end of the threaded rotating table, the inner walls of the fixing frame and the threaded rotating table are respectively provided with a first connecting cavity and a second