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CN-224228619-U - Shock absorber for reaming of horizontal directional drill

CN224228619UCN 224228619 UCN224228619 UCN 224228619UCN-224228619-U

Abstract

The utility model provides a shock absorber for reaming of a horizontal directional drill, which is characterized in that two ends of the shock absorber are respectively connected with a drill rod, the shock absorber comprises a mandrel, a shell, a plurality of racks, an elastic layer and a connecting structure, wherein the mandrel comprises a body and a connecting part which are connected with each other, the outer peripheral surface of the body is wavy, the shell is sleeved on the body and extends along the length direction of the mandrel, the racks are uniformly distributed on the inner wall of the shell around the axis of the shell and are matched with the outer peripheral surface of the body, a first gap is formed between the inner wall of the shell and the outer peripheral surface of the body in a surrounding mode, the elastic layer is accommodated in the first gap, and the connecting structure is sleeved on the connecting part and used for being abutted against the bottom of the shell. According to the utility model, the rack matched with the wavy outer peripheral surface of the body is arranged on the inner wall of the shell, and the elastic piece is arranged in the gap between the rack and the wavy outer peripheral surface of the body, so that the transmission of vibration can be isolated under the advance of the transmission of torque between the mandrel and the shell, the vibration transmitted from the drill bit is not transmitted to the drilling machine, meanwhile, the structure is clear and compact, and the production and maintenance cost is greatly reduced.

Inventors

  • CAO LIANG

Assignees

  • 苏州科艺油气工程设备服务有限公司

Dates

Publication Date
20260512
Application Date
20250630

Claims (8)

  1. 1. The shock absorber for horizontal directional drilling and reaming is characterized by comprising a mandrel (1), a connecting part (12) and a connecting part, wherein the mandrel comprises a body (11) and a connecting part (12) which are connected with each other, and the outer peripheral surface of the body (11) is wavy; The device comprises a body (11) sleeved with a mandrel (1), a shell (2) extending along the length direction of the mandrel, a plurality of racks (21) uniformly distributed around the axis of the shell (2) arranged on the inner wall of the shell, and a first gap (22) formed between the inner wall of the shell (2) and the outer peripheral surface of the body (11) in a surrounding manner, wherein the racks (21) are matched with the outer peripheral surface of the body (11); An elastic layer (3) accommodated in the first gap (22); And the connecting structure (4) is sleeved on the connecting part (12) and is used for abutting against the bottom of the shell (2).
  2. 2. The shock absorber for horizontal directional drilling and reaming according to claim 1, wherein the connecting structure (4) comprises a flower-shaped baffle (41) and a fixed block (42) which are fixedly sleeved on the connecting portion (12) in sequence, the fixed block (42) is abutted against the flower-shaped baffle (41), the flower-shaped baffle (41) comprises tooth blocks (411) which are uniformly arranged around the outer peripheral surface of the flower-shaped baffle, and the tooth blocks (411) are arranged in one-to-one correspondence with the racks (21).
  3. 3. The shock absorber for reaming of horizontal directional drilling as claimed in claim 2, wherein the tooth block (411) is provided with a receiving groove (4111), and the rack (21) extends along the length direction of the housing (2) and is at least partially received in the receiving groove (4111).
  4. 4. The shock absorber for horizontal directional drilling and reaming according to claim 1, wherein the mandrel (1) comprises an abutting portion (13) connected to one end of the body (11) far from the connecting portion (12), and the abutting portion (13) abuts against the top of the shell (2) and is in smooth transition with the body (11).
  5. 5. The damper for reaming of a horizontal directional drill according to claim 1, further comprising a connection pipe (5) fitted over the connection portion (12), wherein the connection pipe (5) includes a through hole (51) formed in a longitudinal direction thereof, and wherein the housing (2) is at least partially accommodated in the through hole (51).
  6. 6. The damper for reaming of horizontal directional drilling as claimed in claim 5, wherein the mandrel (1) comprises a through-hole (14) penetrating along its length direction, and the through-hole (14) is communicated with the through-hole (51).
  7. 7. The shock absorber for reaming of the horizontal directional drill according to claim 5, wherein the outer circumferential surface of the connecting pipe (5) is sleeved with an anti-expansion hoop (6), and the anti-expansion hoop (6) is sleeved at one end of the connecting pipe (5) facing the mandrel (1).
  8. 8. A shock absorber for horizontal directional drilling and reaming as claimed in claim 1, wherein said elastic layer (3) is made of vulcanized rubber.

Description

Shock absorber for reaming of horizontal directional drill Technical Field The utility model relates to the technical field of horizontal directional drills, in particular to a shock absorber for reaming of a horizontal directional drill. Background Along with the development of the horizontal directional drilling industry, the requirements of the market on the construction are gradually refined, namely, different construction equipment or processes are adopted for different construction conditions. When reaming is carried out on a hard rock layer, the phenomenon of jump drilling and resonance can be avoided by a conventional drill rod, and the construction is certainly difficult. In this case, long-term construction greatly affects the service life of the drilling machine, increasing maintenance costs. Currently, shock absorbers have been used on the market to protect the safety of drilling rigs and ground equipment, but it has been found that they generally use springs or hydraulic devices as elastic media, which are not only expensive to manufacture, but also complex in structure, and once damaged, too expensive to repair. In the reaming process, the shock absorber needs to be used at high frequency for a long time, and the excessively high manufacturing cost and maintenance cost are definitely a great burden to a constructor. Therefore, there is a need for a reamer damper that is clear and compact in structure, low in cost, and easy to maintain. Disclosure of utility model In view of the above-mentioned drawbacks of the prior art, an object of the present utility model is to provide a shock absorber for reaming a horizontal directional drill, which has the characteristics of compact structure, low manufacturing cost, and convenient maintenance. To achieve the above and other related objects, the present utility model provides the following technical solutions: A shock absorber for reaming of a horizontal directional drill comprises a mandrel, a shell, a plurality of racks, an elastic layer and a connecting structure, wherein the mandrel comprises a body and a connecting part which are connected with each other, the outer peripheral surface of the body is wavy, the shell is sleeved on the body and extends along the length direction of the mandrel, the racks are uniformly distributed on the inner wall of the shell around the axis of the shell and are matched with the outer peripheral surface of the body, a first gap is formed between the inner wall of the shell and the outer peripheral surface of the body in a surrounding mode, the elastic layer is contained in the first gap, and the connecting structure is sleeved on the connecting part and used for being abutted against the bottom of the shell. According to the technical scheme, the rack matched with the wavy outer peripheral surface of the body is arranged on the inner wall of the shell, and the elastic piece is arranged in the gap between the rack and the wavy outer peripheral surface of the body, so that the transmission of vibration can be isolated under the advance of torque transmission between the mandrel and the shell, and the vibration transmitted from the drill bit is not transmitted to the drilling machine. The connecting structure comprises a flower-shaped baffle and a fixed block which are sequentially and fixedly sleeved on the connecting part, the fixed block is abutted against the flower-shaped baffle, the flower-shaped baffle comprises tooth blocks which are uniformly arranged around the outer peripheral surface of the flower-shaped baffle, and the tooth blocks are arranged in one-to-one correspondence with the racks. According to the technical scheme, the connecting structure at the connecting part is sleeved, the bottom of the shell is abutted, the relative displacement between the shell and the mandrel is limited, and the stable operation of the equipment is ensured. Further, the tooth block is provided with an accommodating groove, and the rack extends along the length direction of the shell and is at least partially accommodated in the accommodating groove. The technical scheme is realized, the torque transmitted from the mandrel is dispersed, so that the stress of the rack is more uniform, the deformation of the rack caused by overlarge instant torque is avoided, and the service life of the equipment is prolonged. Further, the mandrel comprises an abutting part connected to one end of the body far away from the connecting part, and the abutting part abuts against the top of the shell and is in smooth transition with the body. According to the technical scheme, through the cooperation between the connecting structure and the abutting part, the position between the shell and the mandrel is locked, the stable cooperation between the shell and the mandrel is ensured, and the running stability of equipment is improved. The connecting pipe comprises a through hole formed along the length direction of the connecting pipe, and the shell i