CN221722748U - A dual-channel internal slag removal reverse circulation drilling system - Google Patents

Abstract

The utility model discloses a double-channel internal deslagging reverse circulation drilling system, which comprises: the device comprises a bracket, a driving device, a medium guide cover and a slag discharge transition joint; the driving device includes: the device comprises a front driving unit, a rear driving unit, a slag discharging shaft, a driving output connector and a connector connecting seat; the slag discharging shaft is communicated with the space in the shaft of the rear driving output shaft to form a slag discharging channel for slag discharging; a medium channel for guiding medium is formed between the inner surface of the front driving output shaft and the outer surface of the slag discharging shaft. The structure design of the utility model forms internal circulation type slag discharge, namely, the medium is led into the outer channel of the system by the medium leading-in cover, and the medium and slag in the inner channel are discharged by the slag discharge transition joint, so that compared with the existing structure, the utility model has larger slag discharge space and reduces the blocking risk; the structural design is more reasonable, so that the problem that slag is easy to accumulate at a slag discharging structure at present is solved; the floating shaft is replaced, and inconvenience in disassembly and assembly of the drill rod caused by front-back shrinkage is avoided.

Description

A dual-channel internal slag removal reverse circulation drilling system

Technical Field

The utility model relates to the technical field of drilling machines, in particular to a double-channel internal slag removal reverse circulation drilling system.

Background Art

During drilling construction, the drill often gets stuck and even the threaded connection breaks. The reason is that the drill rod is assembled from a hollow steel pipe. The medium enters from the center hole, and the drilled material is discharged along the gap between the surface of the steel pipe and the drilled hole. The flow of the medium and material will damage the drill hole, causing it to become larger and deviate, thus leading to the above-mentioned failure.

In order to solve the above problems, technicians in this field have proposed a dual-channel drill rod and a dual-drive power system for driving the dual-channel drill rod to rotate, with application number 202220609044.4. During operation, the medium enters from the inner channel and is discharged from the outer channel along with the slag, thereby reducing the damage of the drilled material and the medium to the borehole, and ensuring the construction size and accuracy of the borehole. However, the current dual-drive power system adopts an external circulation slag discharge, that is, the medium and slag are discharged from the outside of the slag discharge shaft. The slag discharge space of the external circulation slag discharge structure is small, and large-sized particles are easily stuck here, causing blockage and forming a bottleneck. In addition, a slag collection device must be provided between the drill bit and the drill rod in the system to meet production requirements. The slag collection device is restricted by its own structure and the internal and external drive units, and is prone to material accumulation, further increasing the risk of system blockage, and ultimately causing the equipment to be unable to be used normally, and even stopping work and production to affect the construction progress.

Summary of the invention

To solve the above technical problems, the utility model provides a dual-channel internal slag removal reverse circulation drilling system. In order to have a basic understanding of some aspects of the disclosed embodiments, a simple summary is given below. This summary is not a general review, nor is it intended to identify key/important components or describe the scope of protection of these embodiments. Its only purpose is to present some concepts in a simple form as a preface to the detailed description that follows.

The utility model adopts the following technical solutions:

Provided is a dual-channel internal slag removal reverse circulation drilling system, comprising: a driving device, a medium introduction cover and a slag removal transition joint;

The driving device comprises: a rear driving output shaft, a front driving output shaft and a slag discharge shaft;

The slag discharge shaft is arranged at the front end of the rear drive output shaft, and the slag discharge shaft is connected with the shaft inner space of the rear drive output shaft to form a slag discharge channel for slag discharge, and a slag discharge transition joint connected with the slag discharge channel is arranged at the rear end of the rear drive output shaft;

The front drive output shaft is sleeved on the outside of the slag discharge shaft, and a medium channel for introducing medium is formed between the inner surface of the front drive output shaft and the outer surface of the slag discharge shaft, and the medium introduction cover is connected to the medium channel.

Furthermore, spiral slag discharge blades are provided on the inner surface of the slag discharge shaft.

Furthermore, the driving device also includes: a joint connection seat; the slag discharge transition joint is an arc-shaped pipe, and the slag discharge transition joint is arranged on the joint connection seat; the joint connection seat is arranged on the outside of the rear end of the rear drive output shaft, and a sealing ring is arranged between the joint connection seat and the rear drive output shaft.

Furthermore, the driving device also includes: a rear drive and a meshing rear drive driving gear and a rear drive driven gear; the rear drive driving gear is arranged on the power output shaft of the rear drive, and the rear drive driven gear is arranged on the outer wall of the rear drive output shaft.

Furthermore, the driving device also includes: a driving output connector; the driving output connector is arranged at the front end of the front driving output shaft, and the driving output connector is sleeved on the outside of the slag discharge shaft.

Furthermore, the driving device also includes: a front drive and a meshing front drive driving gear and a front drive driven gear; the front drive driving gear is arranged on the power output shaft of the front drive, and the front drive driven gear is arranged on the outer wall of the front drive output shaft.

Furthermore, the driving device also includes: a front driving unit housing and a rear end bearing cover of the front driving unit; the front driver is arranged on the front driving unit housing; the medium introduction cover is arranged on the rear end bearing cover of the front driving unit; the medium introduction cover is sleeved on the outside of the rear section of the slag discharge shaft; the front driving output shaft is sleeved on the outside of the middle section of the slag discharge shaft; the driving output connector is sleeved on the outside of the front section of the slag discharge shaft.

Furthermore, the dual-channel internal slag removal reverse circulation drilling system also includes: a dual-channel drill rod driven to rotate by the driving device; the dual-channel drill rod includes: an outer drill rod and an inner drill rod arranged inside the outer drill rod; the inner drill rod is connected to the slag removal shaft; the outer drill rod is connected to the drive output connector.

Furthermore, the front end outer wall of the slag removal shaft is provided with an external slag removal shaft transmission spline and an external sealing surface adapted to the inner drill rod, and the rear end inner wall of the slag removal shaft is provided with an internal slag removal shaft transmission spline and an internal sealing surface adapted to the rear drive output shaft.

Furthermore, the dual-channel internal slag removal reverse circulation drilling system also includes: a bracket; the driving device also includes: a rear drive unit housing and a rear end bearing cover of the rear drive unit; the rear driver is arranged on the rear drive unit housing; the joint connecting seat is arranged on the rear end bearing cover of the rear drive unit; the front drive unit housing and the rear drive unit housing are both arranged on the bracket.

Beneficial effects brought by the utility model:

1. The structural design of the present application forms an internal circulation type slag discharge, that is, the medium is introduced into the outer channel of the system by using the medium introduction cover, and the medium and slag in the inner channel are discharged by using the slag discharge transition joint. Compared with the existing structure, the present application has a larger slag discharge space and reduces the risk of blockage;

2. The internal space between the slag discharge shaft and the rear drive output shaft and the slag discharge transition joint located behind the slag discharge shaft are used to discharge slag. The structural design is more reasonable, thus solving the current problem that slag is easily accumulated in the slag discharge structure and further reducing the risk of blockage.

3. The present application utilizes the slag discharge shaft and the rear drive output shaft to drive the inner drill rod, and utilizes the drive output connector and the front drive output shaft to drive the outer drill rod, so as to replace the use of the floating shaft in the prior art, thereby avoiding the problem of inconvenience in disassembly and assembly of the drill rod due to front and rear contraction.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

FIG1 is a schematic structural diagram of a dual-channel internal slag removal reverse circulation drilling system of the utility model;

FIG2 is a schematic diagram of the external structure of the drive device of the utility model;

FIG3 is a schematic diagram of the internal structure of the drive device of the utility model;

FIG4 is a schematic structural diagram of a front drive unit of the present invention;

FIG5 is a schematic structural diagram of a rear drive unit of the present invention;

Figure 6 is a schematic diagram of the structure of the slag discharge shaft of the utility model;

FIG7 is a schematic structural diagram of the utility model slag discharge transition joint;

FIG. 8 is a schematic diagram of the structure of the drive output connector of the utility model.

DETAILED DESCRIPTION

The following is a detailed description of the embodiments of the utility model in conjunction with the accompanying drawings. It should be clear that the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

As shown in FIGS. 1-8 , in some illustrative embodiments, a dual-channel internal deslagging reverse circulation drilling system is provided, comprising: a driving device, a medium introduction cover 3 , a deslagging transition joint 6 , a bracket 7 , and a dual-channel drill pipe.

The driving device comprises: a front driving unit 1 , a rear driving unit 2 , a slag discharge shaft 4 , a driving output connector 5 and a connector connection seat 13 .

The dual-channel drill rod is driven to rotate by a driving device, and specifically includes: an outer drill rod 41 and an inner drill rod 42 disposed inside the outer drill rod 41, wherein the inner drill rod 42 can rotate inside the outer drill rod 41, and a first channel 43 for conveying a medium is formed between the outer surface of the inner drill rod 42 and the inner surface of the outer drill rod 41, and a second channel 44 for slag discharge is formed inside the inner drill rod 42. The front driving unit 1 is used to drive the outer drill rod 41 to rotate, and the rear driving unit 2 is used to drive the inner drill rod 42 to rotate. Multiple dual-channel drill rods are connected in sequence according to actual drilling conditions to finally form an integral drill rod, and the driving device is used to realize the driving rotation of the integral drill rod.

The rear drive unit 2 includes: a rear driver 14 , a rear driver driving gear 15 , a rear driver driven gear 16 , a rear drive output shaft 17 , a rear drive unit housing 51 , and a rear drive unit rear end bearing cover 53 .

The rear drive unit housing 51 is sleeved on the outside of the rear drive output shaft 17. One of the functions of the rear drive unit housing 51 is to be used as a motor mounting seat for carrying the rear driver 14, that is, the rear driver 14 is arranged on the rear drive unit housing 51, and the other function is to realize the rotation support of the rear drive output shaft 17 through the bearing. The joint connection seat 13 is arranged on the rear end bearing cover 53 of the rear drive unit.

The rear driver driving gear 15 is arranged on the power output shaft of the rear driver 14, and the rear driver driven gear 16 is arranged on the outer wall of the rear drive output shaft 17, and the rear driver driving gear 15 is meshed with the rear driver driven gear 16. In this embodiment, the rear driver 14 can use a motor. When working, the rear driver driving gear 15 arranged on the motor output shaft drives the rear driver driven gear 16 to rotate based on the driving force of the motor, thereby driving the rear drive output shaft 17 to rotate.

The slag discharge shaft 4 is arranged at the front end of the rear drive output shaft 17, and the inner drill rod 42 is connected to the slag discharge shaft 4. Therefore, the rear drive unit 2 finally achieves the purpose of driving the inner drill rod 42 to rotate, and the rotation of the slag discharge shaft 4 provides slag discharge power for the slag.

As shown in FIG7 , the slag discharge transition joint 6 is an arc-shaped pipe, and the slag discharge transition joint 6 is arranged on the joint connection seat 13. The joint connection seat 13 is sleeved on the rear end of the rear drive output shaft 17, and a sealing ring is arranged between the joint connection seat 13 and the rear drive output shaft 17 to prevent leakage. At the same time, a bearing is also arranged between the joint connection seat 13 and the rear drive output shaft 17. Specifically, the outer ring of the bearing is connected to the inner wall of the joint connection seat 13, and the inner ring of the bearing is connected to the rear end outer wall of the rear drive output shaft 17. The above structural design ensures that the slag discharge transition joint 6 will not rotate when the rear drive output shaft 17 rotates. First, it ensures the working stability of the slag discharge transition joint 6, and second, it is convenient for the slag discharge transition joint 6 to dock with other pipes for smooth slag discharge.

The front drive unit 1 comprises: a front drive 8 , a front drive driving gear 9 , a front drive driven gear 10 , a front drive output shaft 11 , a front drive unit housing 52 , and a front drive unit rear end bearing cover 54 .

The front drive unit housing 52 is sleeved on the outside of the front drive output shaft 11. One of the functions of the front drive unit housing 52 is to be used as a motor mounting seat, that is, the front driver 8 is arranged on the front drive unit housing 52, and the other function is to realize the rotation support of the front drive output shaft 11 through the bearing. The medium introduction cover 3 is arranged on the bearing pressure cover 54 at the rear end of the front drive unit.

The front driver driving gear 9 is arranged on the power output shaft of the front driver 8, and the front driver driven gear 10 is arranged on the outer wall of the front drive output shaft 11. The front driver driving gear 9 is meshed with the front driver driven gear 10. The front driver 8 can use a motor. When working, the front driver driving gear 9 is arranged on the output shaft of the motor, so that the front driver 8 drives the front driver driving gear 9 to rotate, and then drives the front driver driven gear 10 to rotate, and finally drives the front drive output shaft 11 to rotate.

The drive output connector 5 is disposed at the front end of the front drive output shaft 11, and the outer drill rod 41 is connected to the drive output connector 5, so that the front drive unit 1 drives the outer drill rod 41 to rotate. In this embodiment, the rear drive output shaft 17 and the slag discharge shaft 4 are used to drive the inner drill rod 42 to rotate, and the front drive output shaft 11 and the drive output connector 5 are used to drive the outer drill rod 41 to rotate, so as to replace the use of the floating shaft in the prior art, avoid the problem of inconvenience in disassembling and assembling the drill rod due to the front and rear contraction of the drive system, and the present application is more convenient for the installation and disassembly of the dual-channel drill rod, thereby improving production efficiency.

The front drive unit housing 52 and the rear drive unit housing 51 are arranged on the bracket 7. The bracket 7 facilitates the installation of the dual-channel internal slag removal reverse circulation drilling system of this embodiment on other supporting and transporting equipment to ensure the stability of the drilling system during operation and facilitate transportation.

The slag discharge shaft 4 and the rear drive output shaft 17 in this embodiment are both hollow structures, and the inner shaft spaces of the slag discharge shaft 4 and the rear drive output shaft 17 are connected to form a slag discharge channel for slag discharge.

Among them, a slag removal shaft inner channel 27 is opened inside the slag removal shaft 4, and the slag removal shaft inner channel 27 is the inner shaft space of the slag removal shaft 4; a rear drive output shaft inner channel 20 is opened inside the rear drive output shaft 17, and the rear drive output shaft inner channel 20 is the inner shaft space of the rear drive output shaft 17.

The inner space of the slag discharge transition joint 6 is connected to the inner channel 20 of the rear drive output shaft, that is, it is connected to the slag discharge channel; the second channel 44 inside the inner drill rod 42 is connected to the inner channel 27 of the slag discharge shaft, that is, it is connected to the slag discharge channel, and finally the second channel 44, the slag discharge channel and the inner space of the slag discharge transition joint 6 together constitute the inner channel of the drilling system, and the medium and slag are discharged through the inner channel.

In this embodiment, the front drive output shaft 11 and the drive output connector 5 are both hollow structures.

The front drive output shaft 11 is sleeved on the outside of the slag discharge shaft 4, specifically, on the outside of the middle section of the slag discharge shaft 4, and a medium channel for introducing a medium is formed between the inner surface of the front drive output shaft 11 and the outer surface of the slag discharge shaft 4, and the medium channel serves as the second chamber 30.

A front drive output shaft inner channel 12 is opened inside the front drive output shaft 11, and the slag discharge shaft 4 starts from the front end of the rear drive output shaft 17, passes through the medium introduction cover 3, the front drive output shaft inner channel 12 and the drive output connector 5 in sequence, and is connected to the external drill rod 41.

The medium introduction cover 3 is arranged at the rear end of the front drive unit housing 52, and the medium introduction cover 3 is sleeved on the outside of the rear section of the slag discharge shaft 4, and the bearing is used to realize the rotation support. The medium introduction cover 3 is provided with a medium inlet 28, and air or other liquid phase medium is transported into the medium introduction cover 3 through the medium inlet 28. The inside of the medium introduction cover 3 is connected with the medium channel. Specifically, a first chamber 29 is formed between the inner wall of the cover of the medium introduction cover 3 and the outer wall of the slag discharge shaft 4, and the first chamber 29 is connected with the medium channel.

The drive output connector 5 is sleeved on the outside of the slag discharge shaft 4, specifically, on the outside of the front section of the slag discharge shaft 4, and a third chamber 31 is formed between the inner surface of the drive output connector 5 and the outer surface of the slag discharge shaft 4. A support ring 34 is arranged in the third chamber 31, and the support ring 34 can specifically adopt a bearing that plays a role of rotation support to ensure the stability of the drive output connector 5 and the slag discharge shaft 4 when rotating.

The third chamber 31 is connected to the second chamber 30, the outer drill rod 41 is arranged at the front end of the drive output connector 5, and the first channel 43 is connected to the third chamber 31, so that the first channel 43, the third chamber 31, the second chamber 30 (medium channel), and the first chamber 29 together constitute the outer channel of the drilling system, and the medium is introduced through the outer channel and then discharged from the inner channel along with the slag.

The inner surface of the slag discharge shaft 4 is provided with a spiral slag discharge blade 24, which is used to drive the slag to move during the rotation of the slag discharge shaft 4. During operation, the medium enters the drilling system through the medium inlet 28 on the medium introduction cover 3, and enters the borehole through the first chamber 29, the second chamber 30, the third chamber 31 and the first channel 43 in sequence, and then is discharged along with the slag through the second channel 44, the slag discharge channel and the pipe space of the slag discharge transition joint 6 in sequence, forming an internal circulation slag discharge. Compared with the existing structure, the present application has a larger slag discharge space, reduces the risk of blockage, and has a more reasonable structural design, thereby solving the current technical problem that slag is easily accumulated at the slag discharge structure, and further reducing the risk of blockage.

The front end outer wall of the slag discharge shaft 4 is provided with a slag discharge shaft transmission external spline 26 and an external sealing surface 25 adapted to the inner drill rod 42. Among them, the adaptation means that the spline structure provided on the inner drill rod 42 is meshed with the slag discharge shaft transmission external spline 26, thereby realizing the transmission torque; the sealing surface provided on the inner drill rod 42 and the external sealing surface 25 are both smooth surfaces, and when the inner drill rod 42 is connected to the slag discharge shaft 4, the sealing surface provided on the inner drill rod 42 fits with the external sealing surface 25 to achieve sealing and avoid leakage.

The inner wall of the end of the slag discharge shaft 4 is provided with an inner spline 22 and an inner sealing surface 23 of the slag discharge shaft transmission that are adapted to the rear drive output shaft 17. Among them, the adaptation means that the spline structure provided on the rear drive output shaft 17 is meshed with the inner spline 22 of the slag discharge shaft transmission, thereby realizing the transmission torque; the sealing surface and the inner sealing surface 23 provided on the rear drive output shaft 17 are both smooth surfaces. When the slag discharge shaft 4 is connected to the rear drive output shaft 17, the sealing surface provided on the rear drive output shaft 17 fits with the inner sealing surface 23 to achieve sealing and avoid leakage.

The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims (10)

1. A dual-channel internal deslagging reverse circulation drilling system, which is characterized by comprising: the device comprises a driving device, a medium guide cover and a slag discharge transition joint;

The driving device includes: a rear driving output shaft, a front driving output shaft and a slag discharging shaft;

The slag discharging shaft is arranged at the front end of the rear driving output shaft, the slag discharging shaft is communicated with the intra-shaft space of the rear driving output shaft to form a slag discharging channel for slag discharging, and the rear end of the rear driving output shaft is provided with a slag discharging transition joint communicated with the slag discharging channel;

the front driving output shaft is sleeved outside the slag discharging shaft, a medium channel for guiding in a medium is formed between the inner surface of the front driving output shaft and the outer surface of the slag discharging shaft, and the medium guiding cover is communicated with the medium channel.

2. The dual-channel internal deslagging reverse circulation drilling system of claim 1, wherein spiral deslagging blades are arranged on the inner surface of the deslagging shaft.

3. The dual channel internally deslagging reverse circulation drilling system of claim 2, wherein the driving device further comprises: a joint connecting seat; the slag discharging transition joint is an arc-shaped pipeline and is arranged on the joint connecting seat; the joint connecting seat is sleeved outside the rear end of the rear driving output shaft, and a sealing ring is arranged between the joint connecting seat and the rear driving output shaft.

4. A dual channel internally deslagging reverse circulation drilling system as claimed in claim 3, wherein the driving means further comprises: a rear driver, a rear driver driving gear and a rear driver driven gear which are meshed with each other; the rear driver driving gear is arranged on a power output shaft of the rear driver, and the rear driver driven gear is arranged on the outer wall of the rear driving output shaft.

5. The dual pass internally deslagging reverse circulation drilling system of claim 4, wherein the driving device further comprises: driving the output connector; the driving output connector is arranged at the front end of the front driving output shaft, and the driving output connector is sleeved outside the slag discharging shaft.

6. The dual pass internally deslagging reverse circulation drilling system of claim 5, wherein the driving device further comprises: a front driver, a front driver driving gear and a front driver driven gear which are meshed with each other; the front driver driving gear is arranged on a power output shaft of the front driver, and the front driver driven gear is arranged on the outer wall of the front driver output shaft.

7. The dual pass internally deslagging reverse circulation drilling system of claim 6, wherein the driving device further comprises: a front drive unit housing and a front drive unit rear end bearing cover;

the front driver is arranged on the front driving unit shell;

the medium guide cover is arranged on the bearing cover at the rear end of the front driving unit;

the medium guiding cover is sleeved outside the rear section of the slag discharging shaft; the front driving output shaft is sleeved outside the middle section of the slag discharging shaft; the driving output connection sleeve is sleeved outside the front section of the slag discharging shaft.

8. The dual pass internally deslagging reverse circulation drilling system of claim 7, further comprising: the driving device drives the rotating double-channel drill rod;

the dual-channel drill pipe comprises: an outer drill rod and an inner drill rod arranged inside the outer drill rod;

the inner drill rod is connected with the slag discharging shaft;

the outer drill rod is connected with the driving output connector.

9. The dual-channel internal deslagging reverse circulation drilling system of claim 8, wherein the outer wall of the front end of the deslagging shaft is provided with a deslagging shaft transmission external spline and an external sealing surface which are matched with the internal drill rod, and the inner wall of the rear end of the deslagging shaft is provided with a deslagging shaft transmission internal spline and an internal sealing surface which are matched with the rear driving output shaft.

10. The dual pass internally deslagging reverse circulation drilling system of claim 9, further comprising: a bracket;

The driving device further includes: a rear drive unit housing and a rear drive unit rear end bearing cover;

The rear driver is arranged on the rear driving unit shell;

The joint connecting seat is arranged on the bearing cover at the rear end of the rear driving unit;

the front driving unit shell and the rear driving unit shell are both arranged on the bracket.