CN211448510U - Reverse circulation drilling device - Google Patents
Reverse circulation drilling device Download PDFInfo
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- CN211448510U CN211448510U CN201922101159.3U CN201922101159U CN211448510U CN 211448510 U CN211448510 U CN 211448510U CN 201922101159 U CN201922101159 U CN 201922101159U CN 211448510 U CN211448510 U CN 211448510U
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- drill rod
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Abstract
The utility model provides a reverse circulation drilling device, which comprises a drill frame and a drill rod connected on the drill frame, wherein the drill rod is connected with a working platform through the drill frame; one end of the outer layer drill rod is connected with a first drilling machine, the other end of the outer layer drill rod is connected with a drill bit, one end of the inner layer drill rod is connected with a slurry halter and a second drilling machine, and the other end of the inner layer drill rod is connected with an expansion cavity; the first drilling machine and the second drilling machine are connected with the working platform, and the crushing device is arranged in the enlarged cavity. The utility model discloses a double-deck drilling rod, the bearing is connected, and inside and outside drilling rod rotates each other and does not influence, and the high-speed rotation of inlayer drilling rod does not receive outer drilling rod rotational speed to influence, smashes the cutter and can fully polish and bore the sediment, makes the bold and bores the sediment and is ground evenly, avoids blockking up the drilling rod because of the bold drilling sediment at the in-process that creeps into.
Description
Technical Field
The utility model belongs to the technical field of drilling bored concrete pile drilling, concretely relates to reverse circulation drilling equipment.
Background
The cast-in-situ bored pile is formed through drilling in soil with drilling machine, crushing soil while producing soil slag to form hole, setting reinforcing steel skeleton inside the hole and casting concrete. The cast-in-situ bored pile features simple construction equipment, convenient operation, and suitability for various sandy soil and cohesive soil, as well as soil layers and rock stratums such as broken stone and pebble. Therefore, cast-in-situ bored piles are used in large quantities in construction.
At present, the commonly used drilling method in China mainly comprises a forward circulation hole forming process and a reverse circulation hole forming process, wherein the reverse circulation hole forming process is a drilling process that slurry flows into a hole from an annular gap between a drill rod and a hole wall to cool a drill bit and carry sediments to return to the ground from an inner cavity of the drill rod. The reverse circulation upward-returning speed is high, the slag discharging capacity can be improved, and the probability of repeated crushing of the drilling slag at the bottom of the hole is reduced. But if boring the sediment particle diameter and if surpassing the drilling rod internal diameter and easily blocking up the pipeline, then cause the time limit for a project to delay, seriously influence the efficiency of construction, current utility model adopts multistage drilling rod, and serration is established to every grade of drilling rod, and the drilling rod drives the serration cutting soil body, is equipped with the filter screen between the drilling rod, and the aperture is 18mm respectively, 15mm,10 mm.
The prior utility model has the following problems: firstly, the rotation speed is slow in the drilling process of the drill rod, and the saw-tooth-shaped protrusions cannot effectively cut soil bodies; secondly, the inner diameter of the reverse circulation drilling rod is smaller, and the zigzag protrusions are more likely to cause pipeline blockage; thirdly, when the particle size of more than 18mm is not cut by the saw-tooth-shaped protrusions, the filter screen can become a barrier for blocking the pipeline.
Disclosure of Invention
To above-mentioned prior art not enough and defect, the utility model aims to provide a reverse circulation drilling equipment solves among the prior art and bores the technical problem that the sediment blockked up the pipeline easily.
In order to achieve the purpose, the technical scheme is as follows: a reverse circulation drilling device comprises a drill frame and a drill rod connected to the drill frame, wherein the drill rod is connected with a working platform through the drill frame;
one end of the outer layer drill rod is connected with a first drilling machine, the other end of the outer layer drill rod is connected with a drill bit, one end of the inner layer drill rod is connected with a slurry halter and a second drilling machine, and the other end of the inner layer drill rod is connected with an expansion cavity;
the first drilling machine and the second drilling machine are installed on the working platform, and the crushing device is arranged in the enlarged cavity.
The utility model discloses still have following technical characteristic:
the bearing is arranged between the outer layer drill rod and the inner layer drill rod, the outer layer drill rod is connected with an outer ring of the bearing, and the inner layer drill rod is connected with an inner ring of the bearing.
The expansion cavity is of a hollow structure, the diameter of the expansion cavity is larger than that of the drill rod on the outer layer, the crushing device is a plurality of cutters arranged along the circumferential direction of the inner wall of the expansion cavity, the cutters are perpendicular to the inner wall of the expansion cavity, and each layer is provided with at least 6 cutters and at least two layers.
The drill rod can be arranged in a plurality of sections and is connected through a flange.
Compared with the prior art, the utility model, profitable technological effect is:
(I) the utility model discloses a double-deck drilling rod, the bearing is connected, and inside and outside drilling rod rotates each other and does not influence, and the high-speed rotation of inlayer drilling rod does not receive outer drilling rod rotational speed to influence, and crushing cutter can fully polish and bore the sediment, makes the bold and bore the sediment and is ground evenly, avoids blockking up the drilling rod because of the bold drilling sediment at the drilling in-process.
(II) the utility model discloses the drilling rod internal diameter is less, adopts to enlarge the cavity and can avoid occuping the inlayer passageway, causes the pipe blockage. The cutter and the enlarged cavity are connected through bolts, the cutter can be replaced according to the grinding condition of the cutter, and the cutter grinding device is flexible and convenient.
(III) the utility model uses the flange to connect the drill rod, which is more suitable for the requirement of the actual engineering, and can connect the long drill rod according to the engineering requirement, so that the construction scheme is more flexible; the inner layer drill rod is fixed with the bearing, the outer layer drill rod freely moves, the inner drill rod and the outer drill rod can be separately installed and connected, and sealing is complete.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a bearing connection diagram.
Figure 3 drill pipe connection.
Figure 4 is a detailed schematic view of a drill pipe connection.
Fig. 5 is a lower enlarged view.
FIG. 6 is a schematic view of the cross-sectional structure A-A.
Fig. 7 is an enlarged view of the cutter.
The meaning of the individual reference symbols in the figures is: 1-drill rig, 2-drill rod, 3-working platform, 4-mud tap, 5-pipeline, 6-mud pump, 7-first drilling machine, 8-drill bit, 9-second drilling machine, 10-enlarged cavity, 11-crushing device, 12-cutter, 13-mud tank, 14-protective cylinder and 15-drill hole.
201-outer drill rod, 202-inner drill rod, 203-bearing, 204-flange.
The following detailed description of the present invention will be made with reference to the accompanying drawings and examples.
Detailed Description
The following embodiments of the present invention are given, and it should be noted that the present invention is not limited to the following embodiments, and all the equivalent transformations made on the basis of the technical solution of the present application all fall into the protection scope of the present invention.
Example 1:
according to the technical scheme, as shown in fig. 1 to 7, the reverse circulation drilling device provided by the embodiment comprises a drill rig 1 and a drill rod 2 connected to the drill rig 1, wherein the drill rod 2 is connected with a working platform 2 through the drill rig 1, the reverse circulation drilling device further comprises a mud cage 4 communicated with the drill rod 2, the mud cage 4 is connected with a mud pump 6 through a pipeline 5, the mud cage 4 is of a hollow structure, the mud cage 4 is communicated with an inner layer drill rod 202, the drill rod 2 comprises an outer layer drill rod 201 and an inner layer drill rod 202 which are coaxially sleeved, and the outer layer drill rod 201 and the inner layer drill rod 202 can rotate independently;
one end of the outer layer drill rod 201 is connected with a first drilling machine 7, the other end of the outer layer drill rod 201 is connected with a drill bit 8, one end of the inner layer drill rod 202 is connected with a mud halter 4 and a second drilling machine 9, and the other end of the inner layer drill rod is connected with an expansion cavity 10; the power of the inner drill rod 202 is provided by the second drilling machine 9, and the power of the outer drill rod 201 is provided by the first drilling machine 7
The first drilling machine and the second drilling machine are arranged on a working platform, and a crushing device 11 is arranged in the enlarged cavity 10. When the device is used, a mud pit 13 is required to be arranged for storing mud, and the mud pit 13 and the drilling hole form a liquid circulating system. The mud pump 6 is a machine that draws out the drill cuttings from the mud pot 4 and discharges them to the mud pit 13 during the drilling process.
Preferably, a bearing 203 is arranged between the outer drill rod 201 and the inner drill rod 202, the outer drill rod 201 is connected with an outer ring of the bearing 203, and the inner drill rod 202 is connected with an inner ring of the bearing 203. A bearing 203 is arranged between the inner layer drill rod 202 and the outer layer drill rod 201 every 1-1.5 m, the inner layer drill rod 202 and the outer layer drill rod 201 work independently and do not interfere with each other, the outer wall of the inner layer drill rod 202 is fixed with the inner ring of the bearing 203, the inner wall of the outer layer drill rod 201 is fixed with the outer ring of the bearing 203, and the inner drill rod and the outer drill rod can be installed respectively.
Preferably, in this embodiment, the enlarged cavity 10 is a hollow structure, the diameter of the enlarged cavity 10 is greater than that of the outer drill rod 201, the crushing device 11 is a plurality of cutters 12 arranged along the circumferential direction of the inner wall of the enlarged cavity 10, the cutters 12 are perpendicular to the inner wall of the enlarged cavity 10, and each layer has at least 6 cutters, at least two layers. During operation, slurry enters the enlarged cavity 10 on the inner drill rod 202 through the drill bit 8, and the inner drill rod 202 drives the cutter 12 on the inner wall of the enlarged cavity 10 to rotate at a high speed to grind soil on the premise that the second drilling machine 9 provides power. The more cutters 12 are provided, the better the corresponding soil body grinding effect.
As a preference of this embodiment, the drill rods 2 may be provided in multiple sections, which are connected by a flange 204. When the multi-section drill pipe is used specifically, a plurality of sections of drill pipes can be adopted according to the actual engineering.
The drill rod 2 is fixed on the working platform 3 through the drill frame 1, and the first drilling machine 7 and the second drilling machine 9 are fixed on the working platform 3. The inner layer drill rod 202 is arranged on a power output shaft of a second drilling machine 9, the second drilling machine 9 provides power for the rotation and the movement of the inner layer drill rod 202 and the enlarged cavity 10, drives the cutter 12 to rotate at a high speed to cut soil, and enables the inner layer drill rod 202 to convey drilling slag; the outer layer drill rod 201 is arranged on a power output shaft of the first drilling machine 7, and the first drilling machine 7 provides power for the outer layer drill rod 201 and the drill bit 8, so that the drill bit 8 drills into the cut soil.
When the device of the embodiment is used, the inner drill rod 202 and the outer drill rod 201 are firstly assembled. The lower end of the inner layer drill rod 202 is connected with the enlarged cavity 10, and the upper end is connected with the slurry tap 4; the assembled drill rod 2 is fixed on the working platform 3 through the drill frame 1, the mud cage head 1 is connected with the mud pump 6 through the pipeline 5, and the mud pump 6 is connected with the mud pool 13 through the pipeline 5.
The working process of the device is as follows:
the mud in the mud pit 13 flows into the drill hole along the circular ring between the outer drill rod 201 and the hole wall through the channel arranged on the protective cylinder 14, the outer drill rod 201 drives the drill bit 8 to drill under the power provided by the first drilling machine 7, the mud carrying the drilling slag enters the expansion cavity 10 on the inner drill rod 202 through the drill bit 8, the inner drill rod 202 drives the cutter 12 on the inner wall of the expansion cavity 10 to rotate at a high speed on the premise that the second drilling machine 9 provides the power, the soil body is ground, the ground drilling slag enters the mud cage 4, then the mud and the drilling slag are pumped out to the mud pit 13 to be deposited under the pumping force of the mud pump 6, and then the mud is recycled.
Claims (4)
1. The reverse circulation drilling device comprises a drill frame (1) and a drill rod (2) connected to the drill frame (1), wherein the drill rod (2) is connected with a working platform (3) through the drill frame (1), the reverse circulation drilling device further comprises a mud cage (4) communicated with the drill rod (2), the mud cage (4) is connected with a mud pump (6) through a pipeline (5), the reverse circulation drilling device is characterized in that the drill rod (2) comprises an outer drill rod (201) and an inner drill rod (202) which are coaxially sleeved, and the outer drill rod (201) and the inner drill rod (202) can independently rotate;
one end of the outer layer drill rod (201) is connected with a first drilling machine (7), the other end of the outer layer drill rod is connected with a drill bit (8), one end of the inner layer drill rod (202) is connected with a slurry halter (4) and a second drilling machine (9), and the other end of the inner layer drill rod is connected with an expansion cavity (10);
the first drilling machine (7) and the second drilling machine (9) are installed on the working platform (3), and the crushing device (11) is arranged in the enlarged cavity (10).
2. The reverse circulation drilling device as claimed in claim 1, characterized in that a bearing (203) is arranged between the outer drill rod (201) and the inner drill rod (202), the outer drill rod (201) is connected with the outer ring of the bearing (203), and the inner drill rod (202) is connected with the inner ring of the bearing (203).
3. The reverse circulation drilling device as claimed in claim 1, wherein the enlarged cavity (10) is a hollow structure, the diameter of the enlarged cavity (10) is larger than that of the outer drill rod (201), the crushing device (11) is a plurality of cutters (12) arranged along the circumferential direction of the inner wall of the enlarged cavity (10), and the cutters (12) are perpendicular to the inner wall of the enlarged cavity (10).
4. A reverse circulation drilling apparatus according to claim 1, wherein the drill rods (2) are provided in a plurality of sections, connected by flanges (204).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922101159.3U CN211448510U (en) | 2019-11-29 | 2019-11-29 | Reverse circulation drilling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922101159.3U CN211448510U (en) | 2019-11-29 | 2019-11-29 | Reverse circulation drilling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211448510U true CN211448510U (en) | 2020-09-08 |
Family
ID=72318139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922101159.3U Expired - Fee Related CN211448510U (en) | 2019-11-29 | 2019-11-29 | Reverse circulation drilling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211448510U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114991655A (en) * | 2022-06-20 | 2022-09-02 | 中国矿业大学 | Deep large-diameter annular well drilling system and working method |
-
2019
- 2019-11-29 CN CN201922101159.3U patent/CN211448510U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114991655A (en) * | 2022-06-20 | 2022-09-02 | 中国矿业大学 | Deep large-diameter annular well drilling system and working method |
| CN114991655B (en) * | 2022-06-20 | 2023-01-13 | 中国矿业大学 | Deep large-diameter annular well drilling system and working method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200908 Termination date: 20211129 |