CN215485879U

CN215485879U - Advanced guide and correction core-repairing structure and roller bit

Info

Publication number: CN215485879U
Application number: CN202121068229.0U
Authority: CN
Inventors: 韩泽龙; 邵玉涛; 赵明; 史兵言; 贾炜; 董巍
Original assignee: Institute of Exploration Technology Chinese Academy of Geological Sciences
Current assignee: Institute of Exploration Technology Chinese Academy of Geological Sciences
Priority date: 2021-05-19
Filing date: 2021-05-19
Publication date: 2022-01-11
Anticipated expiration: 2031-05-19

Abstract

The utility model discloses an advanced guide and correction core-repairing structure and a roller bit, wherein the advanced guide and correction core-repairing structure comprises a base and a core-repairing strip, the base is used for being installed on the bit, and the base is provided with a first central channel which is used for a core obtained by the bit to pass through. The core trimming strip is fixedly arranged on the inner wall of the first central passage, the length direction of the core trimming strip is parallel to the axial direction of the first central passage, and the core trimming strip is used for trimming the rock core. The cone coring bit comprises an advanced guide and correction core-repairing structure, a bit body, cone bit legs and a coring pipe. Compared with the prior art, the utility model is convenient to operate and can improve the working efficiency of the drill bit.

Description

Advanced guide and correction core-repairing structure and roller bit

Technical Field

The utility model relates to the technical field of geological exploration, in particular to an advanced guide and correction core-correcting structure and a roller-cone coring bit.

Background

Scientific drilling is scientific engineering which mainly aims at obtaining formation cores and geophysical prospecting data in wells and requires obtaining representative, continuous and high-sampling-rate formation in-situ undisturbed cores. In the prior art, a certain number of core trimming alloy strips are arranged on the inner wall of a core channel of a drill bit, so that the obtained core can be ground again, and the core appearance meeting geological requirements is achieved. In actual use of the gas lift reverse circulation continuous coring roller bit disclosed in the patent number CN 12249848U in the prior art, a core trimming alloy strip needs to be fixed in a core channel of a bit body by workers, so that the operation is difficult and the working efficiency is low. Therefore, how to provide a device with convenient operation and high working efficiency is a technical problem to be solved urgently by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an advanced guide and correction core-repairing structure and a roller-cone coring bit, and aims to solve the technical problems.

In order to achieve the purpose, the utility model provides the following scheme:

the utility model discloses a leading and correcting heart-repairing structure, which comprises:

the base is used for being installed on a drill bit and provided with a first central channel, and a rock core obtained by the drill bit penetrates through the first central channel;

the core trimming strip is fixedly arranged on the inner wall of the first central channel, the length direction of the core trimming strip is parallel to the axial direction of the first central channel, and the core trimming strip is used for trimming the core.

Preferably, the base has a guide boss, the guide boss is located on one side of the base facing the rock to be drilled, and the core repair strip is fixedly arranged on the guide boss.

Preferably, the guide bosses are multiple, the guide bosses are evenly arranged at intervals along the circumferential direction of the first central channel, and each guide boss is provided with the center trimming strip.

Preferably, the connection part of the guide boss and the base is in smooth transition of an arc surface.

Preferably, the heart repair strip is welded to the pilot boss.

Preferably, the outer wall of the base is provided with an annular step, and the annular step is used for being in limit contact with the drill bit.

The utility model also discloses a roller bit, which comprises an advanced guide core-correcting structure, a bit body, a roller bit leg and a core tube, wherein the roller bit leg is arranged at the bottom of the bit body, the bit body is provided with a core channel, the core tube is arranged at the upper part of the core channel, the base is arranged at the lower part of the core channel, and the first central channel is coaxial with the core channel.

Preferably, the cone bit leg has gauge teeth, and the height of the pilot boss is smaller than the vertical distance between the top end of the gauge teeth and the base.

Preferably, the water-jet-hole drill bit further comprises a water-jet-hole assembly, wherein a water-jet-hole flow channel is arranged on the drill bit body, and the water-jet-hole assembly is installed at the tail end of the water-jet-hole flow channel.

Compared with the prior art, the utility model has the following technical effects:

the utility model provides an advanced guide and correction core trimming structure which comprises a base and a core trimming strip, wherein the base is used for being installed on a drill bit, and the base is provided with a first central channel which is used for a core obtained by the drill bit to pass through. The core trimming strip is fixedly arranged on the inner wall of the first central passage, the length direction of the core trimming strip is parallel to the axial direction of the first central passage, and the core trimming strip is used for trimming the rock core. During the use, install this device on the drill bit, when coring and creep into the working process, the broken rock of drill bit tentatively acquires the rock core of required diameter, and the core trimming strip is enough carries out the coping with the rock core that tentatively acquires, and the operation of being convenient for saves workman's physical power, has improved work efficiency. The core after polishing can be ensured to smoothly enter the drill bit through the advanced guide structure, the surface of the core is smooth, and the geological requirement of the appearance of the core can be met.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural view of a roller cone core bit with a lead straight core correction structure according to the present embodiment;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;

FIG. 4 is a schematic structural diagram of a lead correction and correction structure;

wherein: 100-a leading and correcting core-correcting structure and a roller bit; 1-a bit body; 101-a port flow channel; 2-cone bit leg; 201-gauge protection teeth; 3-leading and correcting the core correction structure; 301-a base; 302-guiding boss; 303-a heart repair strip; 4 a water hole component.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

As shown in fig. 1 to 4, the embodiment provides a lead correction core structure 3, which includes a base 301 and a core rod 303, where the base 301 is configured to be mounted on a drill bit, and the base 301 is provided with a first central passage, and the first central passage is used for a core obtained by the drill bit to pass through. The core trimming strip 303 is fixedly arranged on the inner wall of the first central passage, the length direction of the core trimming strip 303 is parallel to the axial direction of the first central passage, and the core trimming strip 303 is used for trimming and grinding the rock core.

During the use, install this device on the drill bit, when coring and creep into the working process, the broken rock of drill bit tentatively acquires the rock core of required diameter, and the core trimming strip 303 is enough to carry out the coping with the rock core that tentatively acquires, and the operation of being convenient for saves workman's physical power, has improved work efficiency. The core after polishing can be ensured to smoothly enter the drill bit through the advanced guide structure, the surface of the core is smooth, and the geological requirement of the appearance of the core can be met.

In order to guide the core before the core enters the first central passage, and to facilitate sharpening of the core, in this embodiment, the base 301 has a guide boss 302, the guide boss 302 is located on one side of the base 301 facing the rock to be drilled, and the sharpening strip 303 is fixedly disposed on the guide boss 302.

In order to improve the guiding effect, in this embodiment, the guiding bosses 302 are multiple, the multiple guiding bosses 302 are uniformly arranged at intervals along the circumferential direction of the first central channel, and each guiding boss 302 is provided with a trimming bar 303.

In order to improve the safety of the device, in this embodiment, the connection between the guiding boss 302 and the base 301 is a smooth arc transition, which can effectively reduce the concentrated stress on the guiding boss 302 and improve the strength of the device.

There are a variety of ways to secure the prosthetic band 303, which can be selected by one skilled in the art as desired. In this embodiment, the trim strip 303 is welded to the guide boss 302. Further, the material of the core bar 303 is preferably an alloy.

In order to facilitate the base 301 to be mounted on the drill, in this embodiment, the outer wall of the base 301 is provided with an annular step, and the annular step is used for being in limit contact with the drill.

The utility model also provides a roller bit, which comprises a leading and correcting core-repairing structure 3, a bit body 1, a roller bit leg 2 and a core-taking pipe, wherein the roller bit leg 2 is arranged at the bottom of the bit body 1, the bit body 1 is provided with a core channel, the core-taking pipe is arranged at the upper part of the core channel, a base 301 is arranged at the lower part of the core channel, and the first central channel is coaxial with the core channel.

In the prior art, a gas lift reverse circulation continuous coring roller bit is characterized in that a core trimming alloy strip is arranged on a central channel of a bit body, namely a core channel. The core repairing alloy strip in the prior art is arranged in a core passage of a drill bit body, and can prevent a core tube from being installed in the core passage of the drill bit body, so that a repaired core cannot smoothly enter the core tube, and the working efficiency is low. In this embodiment, the coring pipe is installed on the upper portion of rock core passageway, and lead ahead and correct structure 3 of coring and install in the lower part of rock core passageway, and it is intraductal enough to guarantee that the rock core after the coping enters into the coring smoothly, has improved work efficiency. During the use, will lead in advance to correct on the repairment structure 3 installs the drill bit body, can lead, the coping to the rock core, the operation of being convenient for.

In this embodiment, the cone leg 2 has the gauge teeth 201, and the height of the pilot boss 302 is smaller than the vertical distance between the top end of the gauge teeth 201 and the base 301, so that the pilot boss 302 can be prevented from contacting the cone leg 2, and the safety of the device is improved.

In order to improve the rock cleaning capability of the drill bit, the drill bit further comprises a water hole assembly 4, a water hole flow passage 101 is formed in the drill bit body 1, the water hole assembly 4 is installed at the tail end of the water hole flow passage 101, and the water hole assembly 4 can clean rock debris generated when the cone bit leg 2 cuts rocks, so that the rock debris is prevented from being accumulated and wearing the cutter wing body.

The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the utility model.

Claims

1. A lead straight-forward correction structure, comprising:

2. The lead straight line dressing structure of claim 1, wherein the base has a pilot boss on a side of the base facing the rock to be drilled, the dressing bar being fixedly disposed on the pilot boss.

3. The lead guide and trim structure of claim 2, wherein the guide bosses are a plurality of bosses, the guide bosses are evenly spaced along the circumference of the first central channel, and each guide boss is provided with a trim strip.

4. The lead guide trim structure of claim 2, wherein the connection between the guide boss and the base is a smooth transition with an arc surface.

5. The lead guide trim structure of claim 2, wherein the trim strip is welded to the guide boss.

6. The lead straight line dressing structure of claim 1, wherein the outer wall of the base is provided with an annular step for limiting contact with a drill bit.

7. A roller cone coring bit comprises the advanced guide and correction core-repairing structure as claimed in any one of claims 1 to 6, and is characterized by further comprising a bit body, a roller cone bit leg and a coring pipe, wherein the roller cone bit leg is mounted at the bottom of the bit body, the bit body is provided with a core passage, the coring pipe is mounted at the upper part of the core passage, the base is mounted at the lower part of the core passage, and the first center passage is coaxial with the core passage.

8. The roller cone core bit of claim 7 wherein the roller cone legs have gauge teeth and the base has a pilot boss having a height less than a vertical distance between a top end of the gauge teeth and the base.

9. The roller cone core bit of claim 7 further comprising a port assembly, wherein the bit body is provided with a port channel, and the port assembly is mounted at the end of the port channel.