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CN-224214141-U - Drilling fishing tool

CN224214141UCN 224214141 UCN224214141 UCN 224214141UCN-224214141-U

Abstract

The utility model provides a drilling fishing tool, includes coring bit and the magnetism subassembly of inhaling that its inside set up, and coring bit includes well section of thick bamboo, and well section of thick bamboo one end is provided with annular cutter, and the other end is provided with the connector. The magnetic attraction assembly is positioned at the inner side of the middle cylinder, a second annular check ring, a magnetic attraction part and a first annular check ring are respectively arranged along the axis from outside to inside, the magnetic attraction part comprises a plurality of magnets which are annularly arranged at intervals, a spacer is annularly arranged between the adjacent magnets, the heights of the two sides of the spacer and the contact surface of the magnets are different, one side of the spacer is a high end, the other side of the spacer is a low end, the inner surface of the low end is flush with the inner surface of the magnets, and the inner surface of the high end exceeds the thickness of a composite sheet on the inner surface of the magnets. The magnets and the spacers are arranged at intervals, so that on one hand, the cost of the magnets can be saved, the installation and the later maintenance are convenient, and on the other hand, the absorbed drill bit composite sheet or the drill bit crushing piece can slide by at most one width of the magnets, and the sliding distance on the surface of the magnets is reduced.

Inventors

  • QIAN LINWANG
  • ZHAO XING
  • CAO YUNFEI

Assignees

  • 肥城新查庄地质勘查有限公司

Dates

Publication Date
20260508
Application Date
20250625

Claims (9)

  1. 1. The utility model provides a drilling fishing tool, includes coring bit (1) and inside magnetic attraction subassembly (2) that set up, its characterized in that, coring bit (1) include well section of thick bamboo (12), and well section of thick bamboo (12) one end is provided with annular cutter (11), and the other end is provided with connector (13); The magnetic component (2) is positioned at the inner side of the middle cylinder (12), and a second annular check ring (24), a magnetic part and a first annular check ring (21) are respectively arranged from outside to inside along the axis; The magnetic attraction part comprises a plurality of magnets (22) which are annularly arranged at intervals, a spacer (23) is annularly arranged between every two adjacent magnets (22), the heights of contact surfaces of two sides of the spacer (23) and the magnets (22) are different, one side is high, the other side is low, the inner surface of the low end is flush with the inner surface of each magnet (22), and the inner surface of the high end exceeds the inner surface of each magnet (22) by a distance equal to the thickness of a composite sheet.
  2. 2. The tool according to claim 1, wherein the magnet (22) has an arc-shaped structure, two side end faces are directed to the central axis of the middle barrel (12), and the radius of the outer side face is matched with the inner diameter of the middle barrel (12).
  3. 3. A drilling and fishing tool according to claim 2, characterized in that the spacer (23) has an arc structure, the end faces of the two sides are directed to the central axis of the middle barrel (12), the radius of the outer side is matched with the inner diameter of the middle barrel (12), the inner side is in arc transition from the high end to the low end, and the center of the arc is towards the inner side.
  4. 4. A tool according to any one of claims 1-3, wherein the magnet (22) of the magnet portion is fitted in the inner barrel with a spacer (23) in a plug-in manner.
  5. 5. The drilling and fishing tool according to claim 4, wherein inner sides of the upper end and the lower end of the middle barrel (12) are respectively provided with a section of internal threads for connecting the first annular retainer ring (21) and the second annular retainer ring (24).
  6. 6. A borehole fishing tool according to claim 5, characterised in that the second annular collar (24) is provided in two, overlapping arrangements.
  7. 7. A borehole fishing tool according to claim 1, characterized in that the annular widths of the first annular collar (21) and the second annular collar (24) are greater than the thickness of the magnet (22).
  8. 8. A borehole fishing tool according to claim 1, characterized in that the connection head (13) is provided with an external thread for connecting a drill rod.
  9. 9. A borehole fishing tool according to claim 1, wherein the annular cutter (11) has an inner diameter not smaller than the inner diameter of the intermediate barrel (12).

Description

Drilling fishing tool Technical Field The utility model relates to the technical field of drilling, in particular to a drilling and fishing tool for soil layers or rocks. Background In the daily drilling process, the conditions that the composite bit falls off, the drill bit is damaged or metal foreign matters fall into the hole can be met, so that the hole accidents are caused, and a special salvaging device is needed for salvaging the metal foreign matters at the bottom of the hole. The combination of the coring bit and the magnet is an effective technical means for scooping out the metallic foreign matters at the bottom of the hole, the magnet can attract magnetic materials such as iron, nickel, cobalt and the like, and when the bit works at the bottom of the hole after the combination of the magnet and the coring bit, the magnet can absorb the metallic foreign matters at the bottom of the hole, such as composite sheets, scrap iron, steel balls and the like. The existing combination mode of the coring bit and the magnet is divided into an internal magnet and an external magnet. The special magnet mounting groove can be designed in the core bit, and the magnet is fixed in the bit, so that the magnet and the bit are integrated. The design does not affect the drilling function of the drill bit, and the magnet can continuously adsorb metal foreign matters in the drilling process of the drill bit. External magnet, the magnet is arranged outside the core bit, such as the magnet is arranged on the handle or the side surface of the bit. This approach facilitates installation and replacement of the magnets, but may affect the balance and drilling accuracy of the drill bit. Thus, some prior art uses more built-in magnets, such as the one disclosed in patent application CN202020771866.3, entitled drilling mechanism. However, a problem existing in fishing by the built-in magnet is that after the magnet attracts the drill bit composite sheet, the drill bit composite sheet or the drill bit breaking member slides on the surface of the magnet along with the rotary drilling of the drill bit, so that the surface of the magnet is scratched. Disclosure of utility model In order to solve the technical problems in the background art and reduce the sliding distance of a drill bit composite sheet or a drill bit crushing piece on the surface of a magnet, the utility model provides a drilling fishing tool. The technical scheme of the utility model is as follows: The utility model provides a drilling fishing tool, includes coring bit and the magnetism subassembly of inhaling that its inside set up, and coring bit includes well section of thick bamboo, and well section of thick bamboo one end is provided with annular cutter, and the other end is provided with the connector. The magnetic component is positioned at the inner side of the middle cylinder, and a second annular check ring, a magnetic part and a first annular check ring are respectively arranged from outside to inside along the axis; The magnet attraction part comprises a plurality of magnets which are annularly arranged at intervals, a spacer is annularly arranged between adjacent magnets, the heights of the two sides of the spacer and the contact surface of the magnets are different, one side of the spacer is high, the other side of the spacer is low, the inner surface of the low end is flush with the inner surface of the magnet, and the inner surface of the high end exceeds the thickness of a composite sheet on the inner surface of the magnet. The number of the magnets is not excessive, and 3-5 magnets are adopted, so that the rapid installation is facilitated. During installation, a small sleeve can be inserted into the middle of the middle cylinder to prevent the magnet from falling off due to overturning, so as to assist rapid installation. The magnets and the spacers are arranged at intervals, so that on one hand, the cost of the magnets can be saved, the installation and the later maintenance are convenient, and on the other hand, the absorbed drill bit composite sheet or the drill bit crushing piece can slide by at most one width of the magnets, and the sliding distance on the surface of the magnets is reduced. Preferably, the magnet is of an arc-shaped structure, the end faces of the two sides point to the central axis of the middle cylinder, and the radius of the outer side is matched with the inner diameter of the middle cylinder. The spacer adopts an arc structure, the end faces of the two sides point to the central axis of the middle cylinder, the radius of the outer side face is matched with the inner diameter of the middle cylinder, the inner side face transits from a high end to a low end in an arc manner, and the center of the arc faces to the inner side. Thus, the contact surface of the magnet and the spacer is in an aligned state, and the connection is tight. The magnet of the magnetic attraction part and the spacer are assembled in the inner cylinder