CN111827894A - Drill rod component and drilling machine with same - Google Patents

Abstract

The present invention provides a drill rod assembly comprising: a drill rod component; the drilling device further comprises a cutting component which is movably connected to the drill rod component in a radially-expandable mode and is suitable for being matched with the drill rod component to achieve drilling, wherein the drilling diameter of the drill rod component is larger in an expanded state of the cutting component than in an unexpanded state of the cutting component. Through the design, the drill diameter of the drill rod component is smaller than or equal to the inner diameter of the casing component used for protecting the hole wall when the drill rod component is in a recovery state, so that the drill rod component can be movably embedded in the casing to realize the function of protecting the wall when the casing can follow the drill rod component to move up and down when the drill rod component drills, the cutting component is arranged in the unfolding state through operation, the drill diameter of the drill rod is larger than the inner diameter of the casing, so that the hole diameter of a hole drilled by the drill rod component is at least larger than the inner diameter of the casing, and the frictional resistance of a soil body to the casing during descending can be reduced.

Description

Drill rod component and drilling machine with same

Technical Field

The invention relates to a drilling device and equipment for a construction site, in particular to a drill rod component and a drilling machine with the drill rod component.

Background

The existing long spiral pressure grouting pile construction is that a hole is drilled to a pile end holding layer required by design, then the drill is stopped to pour concrete, the drill is removed after the concrete is poured to the ground surface, and a reinforcement cage is inserted. When the pile can be constructed on site, the pile top elevation is always away from the floor surface by a certain distance (namely, a hollow hole needs to be formed), and the conventional construction method can only be used for pouring concrete to the floor surface by pressure, so that the steel reinforcement cage can be smoothly and cleanly inserted into the pile body, otherwise, the position can be misaligned, or soil on a drill rod blade falls into the hollow hole, or soil on the wall of the hole is brought into and inserted into the concrete body pile body when the steel reinforcement cage is inserted, so that quality accidents such as mud clamping of the pile body and the like are caused. Thus, each pile must be cast to the ground to waste a large amount of concrete, and must be chiseled off during the construction of the cap.

Therefore, the prior art discloses a drilling machine, which firstly embeds a steel pipe casing according to the depth of a hollow hole of each pile so as to achieve the wall protection effect of the hollow hole section. Chinese patent document CN208088287U discloses a half pile casing pressure-filling pile application type equipment, including original state geotome, original state geotome pressure-filling pile frame, crawler crane, excavator, concrete pump and pile casing, the built-in helical blade of original state geotome, the cooperation of pile casing top is provided with hydraulic vibration hammer, crawler crane is used for hoisting the steel reinforcement cage, the excavator is used for helping transporting the soil body that original state geotome took out, the length of pile casing is half the pile body height of pressure-filling pile. This equipment has realized will regard as the helical blade of drilling part and has built in protecting a section of thick bamboo to integrated on an equipment, and then realize drilling the limit and bury underground and protect a section of thick bamboo, not only can reduce the use of equipment, need not solitary a section of thick bamboo decline equipment promptly, the efficiency of construction improves greatly. However, because the spiral blade is internally arranged in the protective cylinder, the diameter of the spiral blade drilling hole in the equipment is smaller than or equal to the inner diameter of the protective cylinder, so that soil on the hole wall can generate large friction resistance to the descending of the protective cylinder, and therefore, a hydraulic vibration hammer is further arranged on the upper part of the protective cylinder of the equipment and used for carrying out high-frequency impact on the protective cylinder to promote the descending of the protective cylinder.

Chinese patent document CN107938660A discloses a construction method of a large-diameter cast-in-situ bored pile casing, and discloses a method for drilling and embedding the casing, wherein the diameter of a drill bit is greater than the outer diameter of a casing device, so that the frictional resistance of the soil body on the wall of the hole to the casing can be reduced by a large procedure, and the descending of the casing is facilitated; however, as can be seen from the drawings, the use of two different devices for drilling and lowering the protective cylinder by the drill bit results in a large number of devices and high construction cost, and the use of two different devices requires the devices to be shifted and replaced when different construction steps are performed, resulting in low construction efficiency.

Disclosure of Invention

The invention aims to solve the technical problem of how to provide a drilling machine which can realize the wall protection effect followed by a casing when a drill rod is drilled, can reduce the frictional resistance of soil bodies to the descending of the casing, can pull out the drill rod under the condition of removing the casing, has high construction efficiency and simple structure and is provided with the drill rod assembly.

The present invention provides a drill rod assembly comprising: a drill rod component; the drill rod component comprises a cutting component and a drill rod component, wherein the cutting component is movably connected to the drill rod component in a radially expandable mode and is suitable for being matched with the drill rod component to realize drilling, and the drill diameter of the drill rod component is larger than that of the drill diameter of the drill rod component in an undeployed state of the cutting component.

The drill rod assembly described above, wherein the drill rod assembly has a power end, and a drilling end opposite the power end; the cutting component is radially expanded from the drilling end to the power end.

The drill rod assembly described above, wherein the drill rod assembly comprises: the drill rod comprises a drill rod body, a spiral blade and a drill bit, wherein the spiral blade is arranged on the drill rod body, and the drill bit is arranged on the drill rod body and is positioned at the drilling end; wherein the cutting member is provided on one or more of the drill rod body, the helical blade, and the drill bit.

The drill rod assembly described above, wherein the drill rod has a movement restricting structure that restricts movement of the cutting member in the deployment direction.

The drill rod assembly described above, wherein the cutting member is connected to the drill rod member at least by a spring member; when the cutting part is in the protective cylinder, the spring part is limited by the inner wall of the protective cylinder to be in a compressed state, so that the cutting part is in a recovery state; the spring member is adapted to radially expand the cutting member when the cutting member is outside the guard cylinder.

The drill rod assembly described above, wherein the cutting member is hinged to an outer edge of the helical blade.

The present invention also provides a drilling rig comprising: a frame; wherein, still include: the cylinder protecting assembly is arranged on the rack and comprises a cylinder protector for protecting the wall of the hole; the drill rod assembly is arranged on the frame and at least partially movably embedded in the protective cylinder; and the driving mechanism is arranged on the rack, is respectively connected with the cylinder protecting component and the drill rod component, and is used for respectively realizing the vertical nesting motion of the cylinder protecting component and the drill rod component.

The above drilling machine, wherein the driving mechanism comprises: the hoisting device is arranged on the rack; the pulley assembly is arranged on the rack and is respectively connected with the hoisting device, the casing assembly and the drill rod assembly; the pulley assembly comprises a plurality of pulleys and a pulley rope, wherein the pulley rope is installed on the pulleys, one end of the pulley rope is connected with the hoisting device, and the other end of the pulley rope is connected with the casing assembly and the drill rod assembly.

The drilling rig described above, wherein the sheave comprises: a fixed pulley further comprising a first fixed pulley and a second fixed pulley; wherein the hoisting device is adapted to apply an upward pulling force to the casing assembly and the drill rod assembly through the pulley rope mounted on the first fixed pulley; the hoisting device is adapted to apply a downward pulling force to the casing assembly and/or the drill rod assembly through the pulley rope mounted on the second fixed pulley.

The drilling machine, wherein the casing assembly further comprises a casing power component mounted on the casing, and the casing power device is suitable for providing rotary power for the casing.

The above drilling rig, wherein the frame comprises: a chassis structure on which the hoisting device is mounted; the lower end of the tower column structure is arranged on the chassis structure and is provided with a guide rail; the tower structure is arranged at the upper end of the tower column structure; wherein the sheave assembly is mounted on the tower structure; the protective cylinder assembly and the drill rod assembly are respectively arranged on the guide rail, and the guide rail provides guidance for the vertical movement of the protective cylinder assembly and the drill rod assembly.

In the drilling machine, the casing power device is connected with the casing through a pin shaft; the pulley rope arranged on the pulley is connected with the cylinder protecting component through the cylinder protecting power device.

The drilling rig as described above, wherein said pulley rope mounted on said pulley is connected to said drill rod assembly through said drill rod power unit.

Compared with the prior art, the technical scheme of the invention has the following technical effects:

1. the drill rod assembly of the embodiment of the invention comprises: a drill rod component; the drill rod component comprises a cutting component and a drill rod component, wherein the cutting component is movably connected to the drill rod component in a radially expandable mode and is suitable for being matched with the drill rod component to realize drilling, and the drill diameter of the drill rod component is larger than that of the drill diameter of the drill rod component in an undeployed state of the cutting component. Can realize through above design when retrieving the state, the bore diameter of drilling rod part is less than or equal to the internal diameter that is used for protecting the section of thick bamboo part of pore wall, makes drilling rod part can the activity inlay in protect in the section of thick bamboo to the realization protects a section of thick bamboo and can follow when drilling rod subassembly drills the section of thick bamboo and protect the wall function when moving from top to bottom, and will through the operation make when cutting part is arranged in the expansion state the bore diameter of drilling rod is greater than protect the internal diameter of a section of thick bamboo, so that the aperture of the hole that drilling rod subassembly bored is greater than at least protect the internal diameter of a section of thick bamboo, can let the soil body reduce the frictional resistance when protecting a section of thick bamboo decline like this.

Because the drill rod component is provided with the cutting part which can be radially expanded, the nesting following movement of the casing can be realized, the wall protection effect is realized, and the drill rod component can be extracted through the inner cavity of the casing under the condition that the casing is not removed, so that the construction efficiency is higher; in addition, the drill rod assembly is relatively simple in structure by only adding radially expandable cutting elements.

2. The radial expansion direction of the cutting part is from the drilling end to the power end, and the design can fully utilize the self gravity of the drill rod component and the matching of soil mass, so that the cutting part is always kept in an expanded state in the drilling process.

3. The drill rod assembly comprises: the drill rod comprises a drill rod body, a spiral blade and a drill bit, wherein the spiral blade is arranged on the drill rod body, and the drill bit is arranged on the drill rod body and is positioned at the drilling end; wherein the cutting member is provided on one or more of the drill rod body, the helical blade, and the drill bit. The cutting part is arranged on the drilling part, which is beneficial to cutting soil body by the cutting part.

4. The drill rod having a movement limiting structure that limits movement of the cutting member in a deployment direction; the design can ensure that the motion limiting structure is matched with the self gravity of the drill rod component to keep the unfolded cutting component in a completely unfolded state; especially in the case of an articulated connection of the cutting member with the drill rod member.

5. The cutting component is connected with the drill rod component at least through a spring component; this can be facilitated by the fact that, when the cutting member is inside the casing, the spring member is constrained by the inner wall of the casing in a compressed state, thereby bringing the cutting member in a retracted state; the spring member is adapted to radially expand the cutting member when the cutting member is outside the guard cylinder. The cutting part does not need to be manually operated to be radially expanded or recovered, and the cutting part can be expanded by the elastic recovery of the spring part only by extending the drill rod main body out of the protective sleeve. Since the cutting member is deployed in a direction from the drilling end to the power end and in a fully radially deployed state, the cutting member has a longitudinal direction perpendicular to the axial direction of the drill rod body, when the cutting member is retracted from the casing, the cutting member is restricted by the inner wall of the casing to be in a retracted state, thereby achieving a retraction operation of the drill rod assembly.

6. The cutting component is hinged on the outer edge of the spiral blade, so that the cutting component can effectively avoid the soil feeding channel of the spiral blade and does not influence the spiral blade to feed soil out of the hole during the drilling process of the drill rod component.

7. The drilling machine of the embodiment of the invention comprises: a frame; wherein, still include: the cylinder protecting assembly is arranged on the rack and comprises a cylinder protector for protecting the wall of the hole; the drill rod assembly is arranged on the frame and at least partially movably embedded in the protective cylinder; the drill rod power component is connected with the drill rod component and provides power for the rotation of the drill rod component; and the driving mechanism is arranged on the rack, is respectively connected with the casing component and the drill rod component, and is used for respectively realizing the vertical mutual nesting motion of the casing component and the drill rod component. By the design, the drilling function and the wall protection function can be integrated on one drilling machine, the cutting part can be placed in a recovery state through operation, so that the drill rod assembly can move in the casing, the cutting part is placed in a unfolding state through operation, the aperture of a hole drilled by the drill rod assembly is at least larger than the inner diameter of the casing, the wall protection effect of casing following during drilling of the drill rod is realized, the frictional resistance of soil to the casing during descending is reduced, the drill rod assembly can be pulled away without removing the casing, and high construction efficiency can be realized; in addition, the drill rod assembly is realized by only adding the cutting part capable of expanding in the radial direction, and the structure of the drill rod assembly is relatively simple.

8. The pulley includes: a fixed pulley further comprising a first fixed pulley and a second fixed pulley; wherein the hoisting device is adapted to apply an upward pulling force to the casing assembly and the drill rod assembly through the pulley rope mounted on the first fixed pulley; the winding device is suitable for applying a downward pulling force to the casing assembly through the pulley rope arranged on the second fixed pulley, so that the downward pulling force of the pulley rope arranged on the second fixed pulley can be fully utilized to accelerate the drilling speed; and when the pulley rope arranged on the two fixed pulleys applies downward tension to the pile casing assembly, the descending speed of the pile casing can be accelerated.

9. The pile casing assembly also comprises a pile casing power device arranged on the pile casing, and the pile casing power device is suitable for providing rotary power for the pile casing; the design can realize the matching of the rotation of the pile casing and the gravity of the pile casing, and is beneficial to the descending of the pile casing; or the hoisting device is further matched with the downward pulling force applied by the pulley rope to accelerate the descending of the pile casing.

Drawings

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

FIG. 1 is a schematic view of a drill rod assembly with cutting components in a retracted state in accordance with one embodiment of the present invention;

FIG. 2 is a schematic view of the drill rod assembly of the embodiment of FIG. 1 with its cutting components in a radially expanded state;

FIG. 3 is a schematic view of a drill stem assembly according to another embodiment of the present invention;

FIG. 4 is a schematic view of one embodiment of the drilling rig of the present invention;

FIG. 5 is a schematic view of the drill stem assembly of the present invention nested with a casing for protecting the wall of a hole;

fig. 6 is a schematic view of another embodiment of the drilling rig of the present invention.

Reference numerals:

1-a drill rod part, 2-a cutting part, 3-a power end, 4-a drilling end, 5-a flange structure, 6-a drill rod body, 7-a helical blade, 8-a drill bit, 9-a spring part, 10-a concrete pouring device, 11-a frame, 12-a casing assembly, 13-a casing, 14-a drill rod assembly, 15-a driving mechanism, 16-a hoisting device, 17-a pulley assembly, 18-a pulley, 19-a pulley rope, 20-a fixed pulley, 21-a first fixed pulley, 22-a second fixed pulley, 23-a casing power device, 24-a chassis structure, 25-a tower column structure, 26-a guide rail, 27-a tower structure; 28-drill pipe power components; 29-a sliding wheel; 30-hole wall, 31-perfusion tube,

Detailed Description

Example 1

As shown in fig. 1, a drill rod assembly comprising: a drill rod member 1; the drilling tool further comprises a cutting part 2 which is radially and expansively movably connected to the drill rod part 1 and is suitable for being matched with the drill rod part to realize drilling, wherein the drilling diameter of the drill rod part is larger in an expanded state of the cutting part than in an unexpanded state. Preferably, the drill rod assembly has a power end 3, and a drilling end 4 opposite the power end 3; as shown in fig. 2, the cutting member 2 is radially spread in a direction from the drilling end 4 to the power end 3. Optionally, the cutting member 2 is hinged to the drill rod member 1. The power end 3 of the drill rod assembly may also be provided with a connection structure, such as a flange structure 5, for connection to an external device. As a further improvement, as shown in fig. 1, the drill rod assembly 1 may further include: a drill rod body 6, a helical blade 7 disposed on the drill rod body 6, and a drill bit 8 disposed on the drill rod body 6 and located at the drilling end 4; wherein the cutting member 2 may be provided on one or more of the drill rod body 1, the helical blade 7, the drill bit 8. Fig. 1 shows only the embodiment in which the cutting member 2 is hinged to the helical blade 7, other embodiments are not shown in fig. 1, and a person skilled in the art can implement the above description in combination with the common general knowledge in the art.

As a further improved embodiment, in the drill rod assembly of the present embodiment, the drill rod member 1 has a movement restricting structure that restricts movement of the cutting member in the expanding direction. In particular, the movement limiting structure may be any structure formed on the drill rod body, or on the helical blade, or even the helical blade itself (not shown here).

As another embodiment, as shown in fig. 3, the cutting member and the drill rod member of the drill rod assembly may be connected at least by a spring member 9, e.g. the cutting member 2 is hinged to the drill rod member 1 and connected together by a spring member 9, the direction of elastic deformation of the spring member 9 matching the direction of the retracting movement of the cutting member 2, as another embodiment, the cutting member and the drill rod member are connected together by a spring member, the spring member providing a limiting spring force (not shown here) for the deployment of the cutting member; this helps to achieve that the spring member 9 is in a compressed state when constrained by the inner wall of the casing, when the cutting member 2 is inside the casing for protecting the bore wall, thereby bringing the cutting member 2 into a retracted state; the spring member 9 is adapted to radially expand the cutting member 2 when the cutting member 2 is outside the guard cylinder.

As another embodiment, in the drill rod assembly of the present embodiment, the cutting member 2 may be hinged directly to the outer edge of the helical blade 7; this articulation may not require connection to the spring member 9 and may be used to retain the cutting member 2 in the fully extended condition solely by the aforementioned motion limiting arrangement in cooperation with the weight of the drill rod itself.

Example 2

As shown in fig. 4, the present embodiment provides a drilling machine including: a frame 11; wherein, still include: the protective cylinder assembly 12 is arranged on the frame 11 and comprises a protective cylinder 13 for protecting the wall of the hole; and the drill rod assembly 14 described in the above embodiment 1, wherein the drill rod assembly 14 is mounted on the frame 11 and at least partially movably embedded in the casing 13; a drill rod power unit 28 coupled to the drill rod unit for providing power for rotation of the drill rod unit, preferably the drill rod power unit is connectable to, and more preferably detachably connectable to, a power end of the drill rod unit; the drilling machine further comprises a driving mechanism 15, the driving mechanism is installed on the rack 11, and is respectively connected with the casing protecting component 12 and the drill rod component 14 and used for respectively realizing the vertical nesting movement of the casing protecting component 12 and the drill rod component 14. In order to realize the movable nesting, the structure of the casing 13 needs to be matched with the structure of the drill rod assembly 14, that is, as shown in fig. 5, when the cutting part 2 of the drill rod assembly 14 is in a recovery state, the drill diameter of the drill rod assembly 14 is smaller than or equal to the inner diameter of the casing 13, and when the cutting part is in a deployment state, the drill diameter of the drill rod assembly 14 is larger than the inner diameter of the casing 13, preferably larger than the outer diameter of the casing 13, so that the diameter of the drilled hole is larger than the outer diameter of the casing, and further, when the casing 13 extends downwards into the hole to perform the casing movement, the resistance of the hole wall 30 to the casing 13 is not minimized, or even zero.

As shown in fig. 4, the driving mechanism 15 may preferably further include: a plurality of winding devices 16, two of which are illustrated in this embodiment, are mounted on the frame 11; the pulley assembly 17 is arranged on the frame 11 and is respectively connected with the hoisting device 16, the casing assembly 12 and the drill rod assembly 14; the pulley assembly 17 includes a plurality of pulleys 18, and a pulley rope 19 mounted on the pulleys 18, and having one end connected to the winding device 16 and the other end connected to the casing assembly 12 and the drill rod assembly 14.

The pulley 18 may preferably include: a fixed pulley 20, the fixed pulley 20 further comprising a first fixed pulley 21 and a second fixed pulley 22; wherein the hoisting device 16 is adapted to apply an upward pulling force to the casing assembly 12 and the drill rod assembly 14 through the pulley rope 19 mounted on the first fixed pulley 21; the hoisting device 16 is adapted to apply a downward pulling force to the casing assembly 12 and/or the drill rod assembly 14 via the pulley rope 19 mounted on the second fixed pulley 22. Specifically, the pulley rope 19 of the second fixed pulley 22 applies a downward pulling force to the casing assembly 12 and/or the drill rod assembly 14, depending on the manner in which the second fixed pulley 22 is installed, e.g., the second fixed pulley 22 has a force-receiving side for receiving the pulling force and a force-applying side for applying the pulling force to other objects, and then the second fixed pulley 22 needs to be installed at a proper position so that the pulley rope 19 portion located at the force-applying side can apply a downward pulling force to the component connected thereto, and the pulley rope 19 located at the force-applying side extends from the second fixed pulley 22 and extends upward to be connected to the component.

The casing assembly 12 preferably further comprises a casing power device 23 mounted on the casing 13, the casing power device 23 being adapted to provide rotational power to the casing 13. The rotation may be a rotation in one direction, i.e. clockwise or counterclockwise, or a periodic rotation alternating clockwise and counterclockwise, which is commonly referred to as a twist or a rocking twist.

The frame preferably comprises: a chassis structure 24, the hoisting device 16 being mounted on the chassis structure 24; a tower column structure 25, wherein the lower end of the tower column structure 25 is mounted on the chassis structure 24 and is provided with a guide rail 26; a tower structure 27 mounted on the upper end of the tower structure 25; wherein the sheave assembly 17 is mounted on the tower structure 27; the casing assembly 12 and the drill rod assembly 14 are respectively mounted on the guide rails 26, and the guide rails 26 provide guidance for the up-and-down movement of the casing assembly 12 and the drill rod assembly 14.

As a further improved embodiment, in the drilling machine of the present embodiment, the casing power device 23 is detachably connected to the casing 13, and may specifically be connected to a pin shaft. In addition, the pulley rope and the casing power device which are arranged on the pulley 18 are connected with the casing component.

As a further improved embodiment, in the drilling machine of the present embodiment, the pulley rope mounted on the pulley is connected with the drill rod assembly through the drill rod power unit.

In order to make it possible to inject pile body raw material, i.e. concrete, into the pile hole during drilling and retaining, the drill rod part is provided with a through cavity for allowing the passage of pile body raw material, e.g. concrete mass.

As a further improved embodiment, as shown in fig. 6, the drilling machine of this embodiment may further include a concrete pouring device 10 mounted on the frame, wherein the concrete pouring device 10 is communicated with the cavity of the drill rod assembly through a pouring pipe 31, and is used for pouring concrete into the pile hole directly through the cavity of the drill rod after the drilling and wall protection work is completed.

It should be understood that the above-described embodiments are merely examples for clearly illustrating the present invention, and are not intended to limit the present invention. Other variations and modifications will be apparent to persons skilled in the art based on the foregoing description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims (10)

1. A drill rod assembly comprising:

a drill rod component;

it is characterized by also comprising

The cutting component is movably connected to the drill rod component in a radially-expanding mode and is suitable for being matched with the drill rod component to realize drilling, and the drilling diameter of the drill rod component is larger than that of the cutting component in an undeployed state.

2. The drill rod component of claim 1, wherein:

the drill rod component is provided with a power end and a drilling end opposite to the power end;

the cutting component is radially expanded from the drilling end to the power end.

3. The drill rod component of claim 2, comprising:

a drill rod main body is arranged on the drill rod main body,

a helical blade provided on the drill rod body, an

The drill bit is arranged on the drill rod main body and is positioned at the drilling end;

wherein the cutting member is provided on one or more of the drill rod body, the helical blade, and the drill bit.

4. A drill rod assembly as claimed in any one of claims 1 to 3 wherein:

the drill rod assembly has a movement limiting structure that limits movement of the cutting member in the deployment direction.

5. The drill rod component of claim 4, wherein:

the cutting member is connected with the drill rod member at least by a spring member.

6. Drill rod unit according to any of claims 1-5, characterized in that:

the cutting member is hinged to the outer edge of the helical blade.

7. A drilling rig, comprising:

a frame;

it is characterized by also comprising:

the protective cylinder assembly is arranged on the rack and comprises a protective cylinder for protecting the hole wall;

the drill stem assembly of any of claims 1-6, mounted to said frame at least partially removably embedded within said casing;

the drill rod power component is connected with the drill rod component and provides power for the rotation of the drill rod component;

and the driving mechanism is arranged on the rack, is respectively connected with the casing component and the drill rod component, and is used for respectively realizing the vertical mutual nesting motion of the casing component and the drill rod component.

8. The drilling machine of claim 7, wherein the drive mechanism comprises:

the hoisting device is arranged on the rack;

the pulley assembly is arranged on the rack and is respectively connected with the hoisting device, the casing assembly and the drill rod assembly;

the pulley assembly comprises a plurality of pulleys and a pulley rope, wherein the pulley rope is installed on the pulleys, one end of the pulley rope is connected with the hoisting device, and the other end of the pulley rope is connected with the casing assembly and the drill rod assembly.

9. The drilling machine of claim 8, wherein the sheave comprises:

a fixed pulley further comprising a first fixed pulley and a second fixed pulley;

wherein the content of the first and second substances,

the hoisting device is suitable for applying upward pulling force to the casing assembly and the drill rod assembly through the pulley rope mounted on the first fixed pulley;

the winding device is adapted to apply a downward pulling force to the casing assembly and/or the drill rod assembly through the pulley rope mounted on the second fixed pulley.

10. The drilling rig according to any one of claims 7-9, wherein said casing assembly further comprises a casing power unit mounted on said casing, said casing power unit adapted to provide rotational power to said casing.

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