CN215108750U

CN215108750U - Drill bit for rotary drilling of stratum

Info

Publication number: CN215108750U
Application number: CN202121232702.4U
Authority: CN
Inventors: 王昆; 王亮; 郭阳阳; 李达明; 孟飞; 黄继波
Original assignee: Chexplor Resource Exploration Technology Co ltd
Current assignee: Chexplor Resource Exploration Technology Co ltd
Priority date: 2021-06-03
Filing date: 2021-06-03
Publication date: 2021-12-10
Anticipated expiration: 2031-06-03

Abstract

The utility model discloses a drill bit for rotary drilling of a stratum, comprising a first drilling head and a second drilling head, wherein the first drilling head is positioned above the second drilling head, the rear end of the first drilling head is fixedly connected with a first connecting shaft, the lower end of the first connecting shaft penetrates to the lower part of the second drilling head, the lower end of the first connecting shaft is fixedly connected with a second connecting shaft, the lower end of the second connecting shaft is fixedly connected with a through pipe, a plurality of first check blocks are arranged on the outer surface of the second connecting shaft near the middle, a protection structure is sleeved on the outer surfaces of the second connecting shaft, the first check blocks and the through pipe, and the lower end of the protection structure is provided with a disc and a protection block; in the drilling process, the first drilling head cleans a part of soil and stones, so that the drilling difficulty of the second drilling head is reduced, and the abrasion of the second drilling head is reduced.

Description

Drill bit for rotary drilling of stratum

Technical Field

The utility model relates to a probing reconnaissance technical field, concretely relates to drilling is dug soon in stratum and is used drill bit.

Background

The drilling refers to the operation of drilling and sampling by using a machine tool and judging the geological condition of a stratum, and is an important technical means in geological exploration work. A cylindrical borehole is formed in the earth formation downhole from the surface with a drilling rig to identify and demarcate the earth formation. The method can obtain mineral samples and soil samples from different depths in the drill hole for analysis and research, is used for measuring physical and mechanical properties and indexes of rocks and soil layers, and provides design requirements. However, the conventional drilling bit is used for directly drilling the stratum, has high damage rate and short service life, and is easy to cause the problem of bit falling.

SUMMERY OF THE UTILITY MODEL

In order to overcome the technical problem among the above-mentioned background, the utility model aims to provide a drilling bit is used in drilling is dug soon to the stratum, first boring head contacts the stratum earlier and carries out a probing, after a period, the second boring head just can contact with the stratum, carry out the secondary probing, because first boring head rotatory probing in-process has cleared up partly earth and stone earlier, so the probing degree of difficulty of second boring head has been reduced, and the wearing and tearing of second boring head have been reduced, solved the drill bit and directly carried out the stratum probing when using, the spoilage is high, the short-lived problem.

The purpose of the utility model can be realized by the following technical scheme:

a drill bit for rotary drilling of a stratum comprises a first drilling head and a second drilling head, wherein the first drilling head is located above the second drilling head, a first connecting shaft is fixedly connected to the rear end of the first drilling head, the lower end of the first connecting shaft penetrates below the second drilling head, a second connecting shaft is fixedly connected to the lower end of the first connecting shaft, a through pipe is fixedly connected to the lower end of the second connecting shaft, a plurality of first check blocks are mounted on the outer surface of the second connecting shaft and close to the middle of the second connecting shaft, a protection structure is sleeved on the outer surfaces of the second connecting shaft, the first check blocks and the through pipe, a disc and a protection block are arranged at the lower end of the protection structure, the disc is located inside the protection block, the lower end of the through pipe penetrates through the protection structure and is connected with the upper end of the disc, and a buffer spring is arranged between the second drilling head and the protection structure, the buffer spring is positioned on the outer surface of the second connecting shaft.

As a further aspect of the present invention: the protection architecture contains protection casing, dog two and expanding spring, the protection casing is located the surface of second connecting axle, dog one and siphunculus, be provided with spout one on the inner wall of protection casing, dog one is located the inside of spout one, be provided with a plurality of dog two on the inner wall of protection casing, install expanding spring on the bottom inner wall of protection casing, expanding spring is located the surface of siphunculus.

As a further aspect of the present invention: the first plurality of stop blocks are arranged in an annular array.

As a further aspect of the present invention: the second plurality of stop blocks are arranged in an annular array.

As a further aspect of the present invention: and the upper end and the lower end of the buffer spring are respectively connected with the lower end of the second drilling head and the upper end of the protective shell.

As a further aspect of the present invention: the protection block is in threaded connection with the disc.

The utility model has the advantages that:

in the drilling process, the first drilling head contacts with the stratum for primary drilling, after a period of time, the second drilling head contacts with the stratum for secondary drilling, and part of soil and stones are cleaned in the rotary drilling process of the first drilling head, so that the drilling difficulty of the second drilling head is reduced, and the abrasion of the second drilling head is reduced;

the elastic preload of the expansion spring is preset, so that the maximum resistance which can be borne by the first drill head during drilling can be effectively adjusted and controlled, and when hard rock is met, the first drill head is retracted into the second drill head, so that the first drill head is prevented from being damaged;

the protection piece that sets up can still hinder first drill point under the condition that dog one and dog two damage and drop, has strengthened this practical reliability.

Drawings

The present invention will be further described with reference to the accompanying drawings.

FIG. 1 is a front sectional view of the overall structure of the present invention;

FIG. 2 is a front view of the overall structure of the present invention;

fig. 3 is a bottom view of the present invention.

In the figure: 1. a first drilling head; 2. a first connecting shaft; 3. a second drilling head; 4. a protective structure; 5. a second connecting shaft; 6. a buffer spring; 7. a first stop block; 8. pipe passing; 10. a disc; 11. a protection block; 41. a protective housing; 42. a second stop block; 43. a telescoping spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-3, a drill bit for rotary drilling of a formation comprises a first drilling head 1 and a second drilling head 3, wherein the first drilling head 1 is located above the second drilling head 3, the second drilling head 3 and the first drilling head 1 are both spiral, a first connecting shaft 2 is fixedly connected to the rear end of the first drilling head 1, the lower end of the first connecting shaft 2 penetrates below the second drilling head 3, a second connecting shaft 5 is fixedly connected to the lower end of the first connecting shaft 2, a through pipe 8 is fixedly connected to the lower end of the second connecting shaft 5, a plurality of first stop blocks 7 are mounted on the outer surface of the second connecting shaft 5 near the middle, a protective structure 4 is sleeved on the outer surfaces of the second connecting shaft 5, the first stop blocks 7 and the through pipe 8, a protective disc 10 and a protective block 11 are arranged at the lower end of the protective structure 4, the disc 10 is located inside the protective block 11, the lower extreme of siphunculus 8 runs through protection architecture 4 and is connected with the upper end of disc 10, be provided with buffer spring 6 between second boring head 3 and the protection architecture 4, buffer spring 6 is located the surface of second connecting axle 5, and siphunculus 8, second connecting axle 5 and first connecting axle 2 are hollow structure, and siphunculus 8, second connecting axle 5 and the inside of first connecting axle 2 are linked together, and at the probing in-process, first boring head 1 contacts the stratum earlier and carries out a probing, and after a period of time, second boring head 3 contacts with the stratum, carries out the secondary probing, because first boring head 1 rotatory probing in-process has cleared up partly earth and stone earlier, so has reduced the probing degree of difficulty of second boring head 3 to the wearing and tearing of second boring head 3 have been reduced.

Protection architecture 4 contains protection casing 41, dog two 42 and expanding spring 43, protection casing 41 is located second connecting axle 5, dog 7 and siphunculus 8's surface, be provided with spout one on protection casing 41's the inner wall, dog 7 is located the inside of spout one, be provided with a plurality of dog two 42 on protection casing 41's the inner wall, install expanding spring 43 on protection casing 41's the bottom inner wall, expanding spring 43 is located the surface of siphunculus 8, and the surface of second connecting axle 5 is provided with a plurality of spout two, and dog two 42 is located the inside of spout two, and through the elasticity preloading of presetting expanding spring 43, the maximum resistance that can bear with the probing of control first boring head 1 effectively.

The first stop blocks 7 are arranged in an annular array.

The second plurality of stoppers 42 are arranged in an annular array.

The upper end and the lower end of the buffer spring 6 are respectively connected with the lower end of the second drilling head 3 and the upper end of the protective shell 41.

The protection block 11 is in threaded connection with the disc 10, and a through groove is formed in the lower surface of the disc 10.

The utility model discloses a theory of operation:

the second drilling head 3 and the first drilling head 1 are both in a spiral shape, the diameter of the second drilling head 3 is 1.5 times of that of the first drilling head 1, initially, the second stopper 42 is in contact with the inner wall of the lower end of the second sliding chute, the first stopper 7 is in contact with the inner wall of the upper end of the first sliding chute, in the drilling process, the first drilling head 1 is firstly in contact with the stratum for primary drilling, after a period of time, the second drilling head 3 is in contact with the stratum for secondary drilling, and as the first drilling head 1 cleans part of soil and stones in the rotary drilling process, the drilling difficulty of the second drilling head 3 is reduced, and the abrasion of the second drilling head 3 is reduced;

through the elasticity preloading of preset expanding spring 43, can adjust and control the biggest resistance that the probing of first boring head 1 can bear effectively, during normal probing, the probing resistance is less than the elasticity preloading of expanding spring 43, the utility model discloses overall structure's position does not change, when meetting hard rock, the probing resistance is greater than the elasticity preloading of expanding spring 43, at this moment, dog one 7, second connecting axle 5 and first connecting axle 2 are whole to the position removal that is close to disc 10, compress expanding spring 43, first boring head 1 is withdrawed to second boring head 3 inside, avoid first boring head 1 to receive the damage, the protection piece 11 of setting can still hinder first boring head 1 to drop under the equal circumstances of damaging of dog one 7 and dog two 42, strengthened the utility model discloses a reliability.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is illustrative and explanatory only, and various modifications, additions and substitutions as described for the specific embodiments described herein may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the invention as defined in the claims.

Claims

1. The drill bit for rotary drilling of the stratum comprises a first drilling head (1) and a second drilling head (3), wherein the first drilling head (1) is located above the second drilling head (3), and is characterized in that a first connecting shaft (2) is fixedly connected to the rear end of the first drilling head (1), the lower end of the first connecting shaft (2) penetrates through the lower portion of the second drilling head (3), a second connecting shaft (5) is fixedly connected to the lower end of the first connecting shaft (2), a through pipe (8) is fixedly connected to the lower end of the second connecting shaft (5), a plurality of first check blocks (7) are mounted on the outer surface of the second connecting shaft (5) close to the middle, a protection structure (4) is sleeved on the outer surfaces of the second connecting shaft (5), the first check blocks (7) and the through pipe (8), a disc (10) and a protection block (11) are arranged at the lower end of the protection structure (4), disc (10) are located the inside of protection piece (11), the lower extreme of siphunculus (8) is run through the upper end of protection architecture (4) and disc (10) and is connected, be provided with buffer spring (6) between second boring head (3) and protection architecture (4), buffer spring (6) are located the surface of second connecting axle (5).

2. The drill bit for rotary drilling of the stratum according to claim 1, wherein the protection structure (4) comprises a protection shell (41), a first stop block (42) and a telescopic spring (43), the protection shell (41) is located on the outer surfaces of the second connecting shaft (5), the first stop block (7) and the through pipe (8), a first sliding groove is formed in the inner wall of the protection shell (41), the first stop block (7) is located inside the first sliding groove, the inner wall of the protection shell (41) is provided with the second stop blocks (42), the telescopic spring (43) is mounted on the inner wall of the bottom end of the protection shell (41), and the telescopic spring (43) is located on the outer surface of the through pipe (8).

3. The drill bit for rotary excavation drilling of the stratum as claimed in claim 1, wherein the plurality of first stoppers (7) are arranged in an annular array.

4. The drill bit for rotary excavation drilling of the stratum as claimed in claim 2, wherein the second plurality of stoppers (42) are arranged in an annular array.

5. The drill bit for rotary excavation drilling of the stratum as claimed in claim 2, wherein the upper end and the lower end of the buffer spring (6) are respectively connected with the lower end of the second drilling head (3) and the upper end of the protection shell (41).

6. The drill bit for rotary excavation drilling of the stratum as claimed in claim 1, wherein the protection block (11) and the disc (10) are in threaded connection.