CN219262293U

CN219262293U - Large diameter guide reamer bit

Info

Publication number: CN219262293U
Application number: CN202220962411.9U
Authority: CN
Inventors: 赵立新; 李原; 邹辉; 邱兴记; 李兵; 刘阳
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-04-25
Filing date: 2022-04-25
Publication date: 2023-06-27
Anticipated expiration: 2032-04-25

Abstract

The utility model discloses a large-caliber guide reaming bit, and belongs to the technical field of geological investigation. The large-caliber guide reaming bit comprises a cylindrical body, wherein the upper end of the cylindrical body is provided with a round table part, and the lower end of the cylindrical body is provided with a bit connecting part; the lower part of the round platform part is provided with a bracket disc, the lower part of the bracket disc is provided with a cone palm, and the cone palm is provided with a cone. The utility model has good guidance performance, and can not form a crotch hole; the drilling tool is stable in operation, low in energy consumption, small in damage to the drilling tool, not easy to break, and low in accident rate in the hole; the requirements on drilling equipment are not high, compared with a roller bit with the same caliber, the stress surface is small, and the weight on bit easily meets the technical requirements.

Description

Large diameter guide reamer bit

Technical Field

The utility model relates to the technical field of geological investigation, in particular to a large-caliber guide reaming bit.

Background

With the vigorous development of geothermal resources and the vigorous development of national capital construction engineering, engineering drilling and geological drilling are coming into the new subject. The drilling caliber is large, the drilling depth is deep, the geology is complex, the drilling perpendicularity and other technical requirements are high, sampling coring is required in many projects, and the core taking rate is high. In order to meet the technical requirements, small-caliber drilling coring is adopted in construction, and large-caliber alloy drag bit reaming or roller bit reaming secondary pore forming is carried out, so that project construction is completed.

One) the shortcomings and drawbacks of conventional drag hole drill bits.

1. The breaking mechanism of the drag bit is cutting, the torque required in construction is large, the equipment energy consumption is large, and the drilling tool is difficult to twist and disassemble.

2. Drag bits are only suitable for the fourth interval of unconsolidated formations and have relatively high application limitations.

3. In the construction of the drag bit, calcium nuclei or pebbles are encountered in the stratum, the drilling tool can jump, noise is increased, the drilling tool is damaged, and the risk of accidents in the hole is increased.

4. The traditional reamer bit has poor guidance performance, can not walk along the 'presbyopia', is easy to form a new hole (hole), forms a bifurcation hole, and has higher accident probability as the drilling hole is deeper.

5. The drag bit has the advantages of rapid abrasion, frequent tripping and repair, low efficiency and high comprehensive cost.

Two) disadvantages and shortcomings of roller cone drill bits.

1. The material cost is high, and a 16 "(phi 406.4 mm) drill bit is about 40000 yuan.

2. The eye-care device is free from guidance, cannot walk along the presbyopia, and is easy to open the new eye.

3. The drilling machine has high requirements on drilling equipment, the drilling machine must provide large bit pressure, when the pressure can not meet the requirements, the roller can not rotate, only partial gear teeth work, the roller is eccentrically worn, and the drill bit is damaged quickly.

4. Three wheel soles of the roller bit are usually worn to different degrees, and only one wheel palm is worn seriously, and the other two wheel soles are in good states, so that the bit can be discarded.

Chinese patent CN201220691519.5 discloses a six-cone reamer, comprising a mandrel, wherein the two ends of the mandrel are provided with threads, the upper end threads are connected with an upper drill rod, and the lower threads are connected with a lower drill bit; the mandrel is axially provided with two cylindrical platforms with larger diameters, three leg assemblies uniformly distributed along the circumference are arranged on the two cylindrical platforms, and the three leg assemblies on the two cylindrical platforms are arranged at intervals. The number of the three-cone is increased to six-cone, so that the abrasion speed of the cone is greatly reduced, the service life is further prolonged, and the drilling efficiency is further improved. The leg assembly is replaced without large equipment, and the leg assembly can be replaced on the drilling construction site, so that the replacement is convenient and quick, and the cost can be saved. The cone assembly adopts a sealing structure, has good sealing performance, and can not generate the blocking phenomenon in the use process, so that the bearing does not need to be washed in the use process. The stress condition of the cone assembly is improved, and the service life is prolonged.

However, the six-cone is arranged in the patent, so that the overall cost is obviously improved, and the applicability of the six-cone is not large-scale; because the diameter of the cylindrical table is limited, the roller cone frame cannot be too long, and the applicable drilling diameter range is relatively small;

the cone, the mounting plate, the supporting frame and the table body are connected in a complicated way; the leg assembly is fixed by the pin shaft, the stability is poor, certain shaking can be generated in the groove, and the overall strength and reliability are directly affected; meanwhile, the axial bearing capacity of the leg assembly is poor through the form of the pin shaft matched with the groove, so that the leg assembly is easy to wear and loose and even broken, and the drilling accident rate is increased;

in addition, a production cylindrical table is required to be additionally designed, the structure of the cylindrical table is complex (the inside is required to be matched with a mandrel to be provided with a central hole, and the outside is required to be provided with an inclined plane, a groove, a pin shaft hole and a screw hole), so that the cost is further increased; meanwhile, the palm assembly needs to be matched with the groove for processing, so that the cost is further increased, and the application range is further reduced;

in addition, after wear, the complex structure makes field construction difficult to provide repair conditions.

Disclosure of Invention

The utility model aims to solve the problems of high cost, strength defect and complex structure of a six-cone reamer in the prior art, and provides a large-caliber guide reamer bit.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the large-caliber guide reaming bit comprises a cylindrical body, wherein the upper end of the cylindrical body is provided with a round table part, and the lower end of the cylindrical body is provided with a bit connecting part;

the lower part of the round platform part is provided with a bracket disc, the lower part of the bracket disc is provided with a cone palm, and the cone palm is provided with a cone.

In some embodiments, the lower end of the drill bit connecting portion is coaxially provided with a threaded hole.

In some embodiments, the support plate is a disc structure, and is coaxially arranged with the cylindrical body;

the center of support dish trompil, the cover is established in the outside of cylinder body.

In some embodiments, the outer ring side of the bracket tray is provided with an arc-shaped notch.

In some embodiments, the arcuate notches are in a circumferential array, and are uniformly arranged in three.

In some embodiments, the lower portion of the carrier platter is connected to the cone palm by welding.

In some embodiments, the cone legs are in a circumferential array, and three are uniformly disposed.

In some embodiments, the upper end of the spider disc is provided with a triangular support plate that is located in a position directly above the cone.

In some embodiments, the cylindrical body is made of round steel.

In some embodiments, the cylindrical body is cut, turned, drilled, and threaded to form an integral frustoconical portion, a bit connecting portion.

Compared with the prior art, the utility model provides the large-caliber guide reaming bit which has the following beneficial effects.

1. The utility model has good guidance performance, and can not form a crotch hole; the drilling tool has stable operation, small energy consumption, small damage to the drilling tool, difficult breakage and reduced accident rate in the hole.

2. The utility model has low requirement on drilling equipment, and has small stress surface and easy bit pressure meeting technical requirements compared with the roller bit with the same caliber.

3. The reaming bit has the advantages of prolonged service life, simple structure, convenient processing and maintenance and strong practicability; even if one cone leg is severely worn and in a bad state, the cone leg can be cut off and replaced by a new cone leg, so that the cone leg can be continuously used, and the material cost is reduced; the drilling efficiency is high, the effect is more obvious in the reexamination of stratum, and the comprehensive economic benefit is improved.

Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows; and will be apparent to those skilled in the art in part based upon a review of the following; alternatively, the teachings may be directed to practice of the present utility model.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is a schematic top view of the present utility model.

Fig. 3 is a schematic structural view of the present utility model in a flat state.

Fig. 4 is a schematic view of the rear side structure of the present utility model in a flat state.

Fig. 5 is a schematic view of the front side structure of the present utility model in a flat state.

In the figure:

1. a cylindrical body; 101. a truncated cone portion; 102. a bit connecting portion; 1021. a threaded hole; 2. a support plate; 201. an arc-shaped notch; 3. cone palm; 4. a roller cone; 5. triangular support plates.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Referring to fig. 1 to 5, the large-caliber pilot reamer bit comprises a cylindrical body 1, wherein the upper end of the cylindrical body 1 is provided with a round table part 101, and the lower end of the cylindrical body is provided with a bit connecting part 102.

Wherein, the cylinder body 1 is made of round steel.

It will be appreciated that drilling is performed in the middle of the round steel to form the drilling fluid channel.

The cylindrical body 1 is cut, turned, drilled and screwed to form an integrated round table part 101 and a drill bit connecting part 102; the integral strength is ensured to be reliable.

Correspondingly, a screw hole 1021 is coaxially formed at the lower end of the bit connecting portion 102 for mounting the guided bit.

A bracket disc 2 is arranged below the round platform part 101, a cone palm 3 is arranged at the lower part of the bracket disc 2, and a cone 4 is arranged on the cone palm 3.

Wherein, the support plate 2 is of a disc structure and is coaxially arranged with the cylindrical body 1.

It will be appreciated that the central opening of the bracket tray 2 has an aperture matching the outer diameter of the cylindrical body 1; the bracket disc 2 is sleeved outside the cylindrical body 1.

For the cone palm 3, the cone palm 3 is connected with the lower part of the bracket disc 2 by welding.

Wherein, the cone palm 3 is in a circumferential array and is uniformly provided with three cone palms; and ensures that the camber angle and the height of the cone 4 are consistent in the installation state.

Further, a triangular support plate 5 is arranged at the upper end of the bracket tray 2; the triangular support plate 5 is positioned right above the roller cone 4 to increase the strength of the working surface and ensure the connection of the bracket disc 2 and the cylindrical body 1.

An arc notch 201 is formed on the outer ring side of the bracket disc 2; the arc-shaped notches 201 are arranged in a circumferential array and are uniformly arranged in three.

Because the technical requirements of each engineering project are different, the outer diameters of the used reaming bits are different; in the following, drilling with a hole or core diameter phi 219mm and a maximum aperture phi 400mm is taken as an example.

The configuration and size of the pilot reamer bit.

The bracket disc 2 and the cylindrical body 1 are made of steel plates with the thickness of 20mm and round steel with the diameter of 160 mm; the diameter of the cylindrical body 1 is 131mm, the diameter of the top end of the round table part 101 is 90mm, and the outer diameter of the bracket disc 2 is 260mm; cutting into basic shapes, and then turning and drilling; three cone palms 3 are welded and fixed on the lower part of the trisection area of the bracket disc 2 respectively; controlling the camber angle and the height of the three roller cones 4 to be consistent; a triangular support plate 5 is arranged right above each cone 4; the lower part of the cylindrical body 1 is turned into corresponding threads according to the connected pilot bit.

In the utility model, the whole body is divided into two parts: a pilot working portion and a reaming working portion. The guiding working part is provided with a drilled original drill bit which is positioned at the lower part of the reaming working part, namely at the working front end, and has a guiding function.

The reaming working part is formed by welding three single roller cones 4 in a combined way; the roller cone 4 rotates while revolving under the drive of the drilling tool, and impacts, crushes and shears broken stratum rock, so that rapid drilling is realized.

The utility model has low cost and saves resources; the overall cost of the phi 400mm pilot bit is less than 1 ten thousand yuan, and 3 ten thousand yuan is saved compared with the same diameter roller bit; in engineering construction, the guiding reaming part fully plays the characteristics of high drilling efficiency, long service life and stable operation of the roller bit in harder rock stratum, avoids the defects that the weight on bit can not meet the requirement and has no guiding, and has good effect.

After the device is applied, the device has the following advantages:

1. good guidance quality, no crotch hole is formed;

2. the drilling tool is stable in operation, low in energy consumption, small in damage to the drilling tool, not easy to break, and low in accident rate in the hole;

3. the requirements on drilling equipment are not high, compared with a roller bit with the same caliber, the stress surface is small, and the weight on bit easily meets the technical requirements;

4. the service life of the reaming bit is prolonged, the structure is simple, and the machining and the use are convenient; even if one cone leg 3 is severely worn and in a bad state, the cone leg 3 can be cut off and replaced by a new cone leg 3, so that the cone leg can be continuously used, and the material cost is reduced;

5. the drilling efficiency is high, the effect is more obvious in the reexamination of stratum, and the comprehensive economic benefit is improved.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims

1. The large-caliber guide reaming bit is characterized by comprising a cylindrical body (1), wherein the upper end of the cylindrical body (1) is provided with a round table part (101), and the lower end of the cylindrical body is provided with a bit connecting part (102);

a support disc (2) is arranged below the round platform part (101), a cone palm (3) is arranged at the lower part of the support disc (2), and a cone (4) is arranged on the cone palm (3);

the bracket disc (2) is of a disc structure and is coaxially arranged with the cylindrical body (1);

the center of the bracket disc (2) is provided with a hole and sleeved outside the cylindrical body (1);

the lower part of the bracket disc (2) is connected with a roller cone palm (3) through welding;

the upper end of the support disc (2) is provided with a triangular support plate (5), and the triangular support plate (5) is positioned right above the roller cone (4).

2. The large-caliber pilot reamer bit according to claim 1, wherein the lower end of the bit connecting portion (102) is coaxially provided with a screw hole (1021).

3. The large caliber pilot reamer bit of claim 1, wherein the outer ring side of the holder plate (2) is provided with an arc-shaped notch (201).

4. A large diameter pilot reamer bit according to claim 3, wherein the arcuate recesses (201) are arranged in a circumferential array of three.

5. The large caliber guide reaming bit of claim 1, wherein three cone legs (3) are uniformly disposed in a circumferential array.

6. A large diameter pilot reamer bit according to claim 1, wherein the cylindrical body (1) is made of round steel.

7. The large caliber pilot reamer bit according to claim 6, wherein the cylindrical body (1) is cut, turned, drilled, and threaded to form an integral boss portion (101) and bit connecting portion (102).