A rotary drilling rig pull-out casing assist device and method of use thereof

Abstract

The application provides a rotary drilling rig pulling-out pile casing auxiliary device and a use method thereof. The auxiliary device is arranged in the pile casing and comprises a chassis, a connecting assembly connected with the chassis, and a mounting assembly. The two ends of the connecting assembly are connected with the pile casing, and the mounting assembly is connected with the rotary drilling rig. The rotary drilling rig can drive the mounting assembly, the connecting assembly, and the pile casing to rotate and lift. The rotary drilling rig can be connected with the pile casing by means of the auxiliary device, and the pile casing can be pulled out. Compared with the prior art in which the pile casing is pulled out by a crawler crane and the rotary drilling rig, the device investment is reduced, the pulling-out time is shortened, and the efficiency of the cast-in-place pile is improved.

Description

Technical Field

[0001] This application relates to the field of construction technology, specifically to an auxiliary device for lifting and pulling out casings for rotary drilling rigs and its usage method. Background Technology

[0002] In bored pile construction, steel casings are often installed to locate the pile positions to be drilled. After the concrete is poured and the empty holes are backfilled, the casings need to be removed in a timely manner to avoid affecting the construction of other bored piles.

[0003] The existing method for removing the casing is to first bring in a rotary drilling rig, place the drill hole below the rotary drilling rig into the casing, and gently shake the drill bit from side to side so that the casing continuously bears the thrust from all directions. When it is found that the casing has become obviously loose, stop the operation, remove the rotary drilling rig, and then place the crawler crane in position. Connect the crawler crane's lifting tool to the lifting hole of the casing, lift it, and then move the casing to an open area.

[0004] The existing methods for removing the casing are quite complicated and require the use of crawler cranes and drilling rigs, which prolongs the completion time of a single pile and reduces the efficiency of cast-in-place piles. Summary of the Invention

[0005] In view of the above-mentioned defects or deficiencies in the prior art, this application aims to provide an auxiliary device for lifting and pulling out the casing of a rotary drilling rig and its usage method.

[0006] In a first aspect, this application provides an auxiliary device for pulling up a casing of a rotary drilling rig, disposed inside the casing, wherein the axis of the casing is a first axis, and the extending direction of the first axis is a third direction, characterized in that the auxiliary device comprises:

[0007] A chassis, the top surface of which has a mounting surface;

[0008] A connecting component, the connecting component including two symmetrically arranged connecting parts distributed along a first direction on the mounting surface, a first space being formed between the two connecting parts, and the far ends of each connecting part being connected to the protective sleeve respectively;

[0009] The mounting assembly is disposed within the first space, with its bottom connected to the mounting surface and both ends along the second direction connected to the connecting assembly. The mounting assembly is connected to the rotary drilling rig on the side away from the chassis. The rotary drilling rig can drive the mounting assembly, the connecting assembly, and the casing to rotate about the first axis and move along the third direction. The second direction is perpendicular to the first direction, and the third direction is perpendicular to both the second direction and the third direction.

[0010] According to the technical solution provided in the embodiments of this application, the installation component includes an installation body disposed on the installation surface, the installation body having a first groove, and one end of the rotary drilling rig being placed in the first groove and connected to the installation body.

[0011] According to the technical solution provided in the embodiments of this application, each of the connecting parts includes two connectors, and the four connectors form the first space. The two connectors of the same connecting part form a first angle away from the mounting component end. The opening of the first angle faces the mounting component end. The two connectors of the same connecting part are respectively connected to the two ends of the mounting body along the second direction away from the protective sleeve end.

[0012] According to the technical solution provided in the embodiments of this application, two connectors on the same side of different connecting portions form a second included angle at their close ends, and the opening of the second included angle faces away from the mounting component; the connecting component further includes a reinforcing component, which is used to connect two connectors on the same side of different connecting portions.

[0013] According to the technical solution provided in the embodiments of this application, each of the connecting parts further includes a connecting plate disposed at the end away from the mounting component, and the two connecting members of each of the connecting parts are connected to the connecting plate at the end away from the mounting component, and the connecting plate is connected to the protective sleeve at the end away from the mounting component.

[0014] According to the technical solution provided in the embodiments of this application, the mounting body has two side walls along the first direction with a first through hole communicating with the first groove. One end of the rotary drilling rig placed in the first groove is the first end. A second through hole is provided through the first end and corresponding to the first through hole. The axial direction of the first through hole and the second through hole is the first direction. A first locking member is provided through the second through hole and the two first through holes. The first locking member is used to lock the first end to the mounting body.

[0015] According to the technical solution provided in the embodiments of this application, the first locking member includes a first steel pin, the first steel pin includes a first pin column passing through two first through holes and a second through hole, one end of the first pin column is provided with a first baffle exposed outside the mounting body, the outer diameter of the first baffle is larger than the inner diameter of the first through hole, the end of the first pin column exposed outside the mounting body away from the first baffle is provided with a third through hole, a first pin shaft is provided through the third through hole, and the first pin shaft is used to lock the first steel pin.

[0016] According to the technical solution provided in the embodiments of this application, a second space is formed between the connector on the same side of different connecting parts and the mounting body, and a first repair weld is provided in the second space. The first repair weld is used to strengthen the connection strength between the connector and the mounting body.

[0017] According to the technical solution provided in the embodiments of this application, a third space is formed between the two connectors of the same connecting part and the connecting plate, and a second welding component is provided in the third space. The second welding component is used to strengthen the connection strength between the connector and the connecting plate.

[0018] Secondly, this application provides a method for using an auxiliary device for lifting and pulling out casing on a rotary drilling rig, comprising the following steps:

[0019] One end of the rotary drilling rig is fixedly connected to the mounting assembly;

[0020] The protective sleeve is fixedly connected to the connecting assembly;

[0021] Slowly rotate the rotary drilling rig to drive the casing to rotate;

[0022] The rotary drilling rig is lifted to remove the casing.

[0023] In summary, this application proposes an auxiliary device for lifting casings for rotary drilling rigs. The device is installed inside the casing and includes a chassis, a connecting assembly connected to the chassis, and an installation assembly. Both ends of the connecting assembly are connected to the casing, and the installation assembly is connected to the rotary drilling rig. The rotary drilling rig can drive the installation assembly, the connecting assembly, and the casing to rotate and can also raise and lower the casing. The rotary drilling rig can connect to the casing and lift it using this auxiliary device. Compared to existing technologies that use crawler cranes and rotary drilling rigs to lift casings, this reduces equipment investment, shortens the lifting time, and improves the efficiency of cast-in-place piles. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of an auxiliary device for lifting and pulling out the casing of a rotary drilling rig, provided in an embodiment of this application.

[0025] Figure 2 This is a schematic diagram of the auxiliary device for lifting and pulling the casing of a rotary drilling rig provided in the embodiments of this application;

[0026] Figure 3 This is a top view schematic diagram of the auxiliary device for lifting and pulling out the casing of a rotary drilling rig provided in the embodiments of this application;

[0027] Figure 4 This is a schematic diagram of the structure of the first steel pin provided in an embodiment of this application;

[0028] Figure 5This is a cross-sectional schematic diagram of the first locking member provided in an embodiment of this application.

[0029] 1. Casing; 11. Fifth through hole; 2. Base plate; 21. Mounting surface; 3. Connecting part; 31. First space; 32. Connecting piece; 33. Second space; 34. Second end; 35. Third edge; 36. Third space; 4. Mounting assembly; 41. Mounting body; 42. First groove; 43. First edge; 44. First through hole; 5. Drill rod; 51. First end; 6. Reinforcing assembly; 61. First gap; 7. Connecting plate; 71. Fourth through hole; 8. First locking piece; 81. First steel pin; 811. First pin; 812. First baffle; 813. Third through hole; 82. First pin shaft; 821. Second baffle; 822. Locking piece; 8221. Lateral part; 8222. Extension part. Detailed Implementation

[0030] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0031] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0032] As mentioned in the background section, this application proposes an auxiliary device for lifting and pulling the casing of a rotary drilling rig, which is disposed inside the casing 1. The axis of the casing 1 is a first axis, and the extension direction of the first axis is a third direction, such as... Figure 1 As shown, the auxiliary device includes:

[0033] The chassis 2 has a mounting surface 21 on its top surface; optionally, the chassis 2 is circular, and when the auxiliary device is fixedly connected to the protective cylinder 1, the chassis 2 and the protective cylinder 1 are coaxially arranged.

[0034] The connecting assembly includes two symmetrically arranged connecting portions 3 distributed along a first direction on the mounting surface 21, forming a first space 31 between the two connecting portions 3, and the far ends of each connecting portion 3 are respectively connected to the protective sleeve 1; as shown Figure 1 As shown, the first direction is the front-to-back direction. Since the two connecting parts 3 are symmetrically arranged, the extension line of the line connecting the two connecting parts 3 to the connection point of the protective cylinder 1 is on the same straight line as the diameter of the protective cylinder 1. This ensures the uniformity of the force when the protective cylinder 1 rotates, and avoids damage to the protective cylinder 1 due to uneven force when driving the protective cylinder 1.

[0035] Mounting component 4 is disposed within the first space 31, with its bottom connected to the mounting surface 21 and both ends along the second direction connected to the connecting component. The mounting component 4 is connected to the rotary drilling rig on the side away from the chassis 2. The rotary drilling rig can drive the mounting component 4, the connecting component, and the casing 1 to rotate around the first axis and move along the third direction. The second direction is perpendicular to the first direction, and the third direction is perpendicular to both the second direction and the third direction.

[0036] Among them, such as Figure 1 As shown, the second direction is the left-right direction, and the third direction is the vertical direction. The drill rod 5 of the rotary drilling rig is connected to the mounting assembly 4. In use, after connecting the rotary drilling rig to the casing 1 through the auxiliary device, rotating the rotary drilling rig drives the mounting assembly 4 and the casing 1 to rotate. After the casing 1 loosens, the lateral friction is eliminated. Then, the rotary drilling rig lifts the mounting assembly 4 and the casing 1, thus pulling up the casing 1. The rotary drilling rig can connect to the casing 1 and pull up the casing 1 with the help of the auxiliary device of this application. Compared with the prior art of pulling up the casing 1 by using a crawler crane and a rotary drilling rig, this reduces equipment investment, shortens the extraction time, and improves the efficiency of the cast-in-place pile.

[0037] In a preferred embodiment, the mounting assembly 4 includes a mounting body 41 disposed on the mounting surface 21, the mounting body 41 having a first groove 42 therein, and one end of the rotary drilling rig being placed in the first groove 42 and connected to the mounting body 41.

[0038] Please refer to Figure 1 and Figure 3 As shown, the mounting body 41 is a cuboid located in the middle of the chassis 2, with its midpoint located on the first axis. The first groove 42 is a rectangular groove, and one end of the drill rod 5 of the rotary drilling rig is placed in the first groove 42 and connected to the mounting body 41. Optionally, the mounting body 41 and the chassis 2 are fixedly connected by welding.

[0039] In a preferred embodiment, each of the connecting portions 3 includes two connectors 32, and the four connectors 32 form the first space. The two connectors 32 of the same connecting portion 3 form a first angle away from the end of the mounting component 4. The opening of the first angle faces the end of the mounting component 4. The two connectors 32 of the same connecting portion 3 away from the end of the protective sleeve 1 are respectively connected to the two ends of the mounting body 41 along the second direction.

[0040] Among them, such as Figures 1-3As shown, optionally, the connector 32 can be an I-beam. The connectors 32 on the same side of two different connecting parts 3 are close to each other and their edges close to the mounting assembly 4 are welded together. The two connectors 32 of the same connecting part 3 are respectively welded to the left and right first edges 43 of the front and rear side walls of the mounting body 41. The four connectors 32 form a rhombus, which improves the connection strength and stability. When the inner diameter of the protective sleeve 1 is different, the auxiliary device can be matched with the protective sleeve 1 by changing the length of the connector 32 and the size of the first included angle.

[0041] In a preferred embodiment, two connectors 32 on the same side of different connecting portions 3 form a second included angle at their close ends, with the opening of the second included angle facing away from the mounting assembly 4; the connecting assembly further includes a reinforcing assembly 6, which is used to connect two connectors 32 on the same side of different connecting portions 3.

[0042] Optionally, each of the connectors 32 is rectangular in shape. Since the two connectors 32 on the same side of different connecting parts 3 are welded to their corresponding first edges 43, a first gap 61 is formed between the two connectors 32 on the same side away from the mounting assembly 4. Optionally, the reinforcing assembly 6 is a cuboid plate. The reinforcing assembly 6 is welded to the connector 32. When the connector 32 is an I-beam, two reinforcing assemblies 6 are needed on each side to connect the two connectors 32.

[0043] In one embodiment, a second space 33 is formed between the connector 32 on the same side of different connecting portions 3 and the mounting body 41. A first repair weld is provided in the second space 33, which is used to strengthen the connection strength between the connector 32 and the mounting body 41.

[0044] In this process, the welding of each of the connecting parts 32 to the first edge of the mounting body 41, as well as the welding of two connecting parts 32 of different connecting parts 3, are all line-to-line welding. The cross-section of the second space 33 is triangular. Optionally, the first repair weld is an iron sheet with an approximately triangular cross-section that can be placed in the second space 33. The gap between the first repair weld and the inner wall of the second space 33 is filled by solder, thereby realizing the surface-to-surface connection of the connecting parts 32, the mounting body 41, and the first repair weld, as well as the line-to-line connection, which improves the connection strength and makes the auxiliary device more stable.

[0045] In a preferred embodiment, each of the connecting portions 3 further includes a connecting plate 7 disposed at the end away from the mounting component 4, and the two connecting members 32 of each of the connecting portions 3 are connected to the connecting plate 7 at the end away from the mounting component 4, and the connecting plate 7 is connected to the sleeve 1 at the end away from the mounting component 4.

[0046] The two connectors 32 of the same connecting portion 3 are symmetrically arranged. Since a first included angle is formed between the two connectors 32 of the same connecting portion 3, the ends of the two connectors 32 of the same connecting portion 3 furthest from the mounting assembly 4 are designated as second ends 34. The two second edges of each second end 34 that are close to each other are welded together, and the third edges 35 furthest from the second edges are all welded to the connecting plate 7. By using the connecting plate 7 to connect the two connectors 32 of the same connecting portion 3, stability is enhanced.

[0047] In a preferred embodiment, a third space 36 is formed between the two connectors 32 of the same connecting portion 3 and the connecting plate 7. A second welding member is provided in the third space 36 to strengthen the connection strength between the connector 32 and the connecting plate 7.

[0048] In this configuration, two connectors 32 of the same connecting part 3 are connected by a second edge and connected to the connecting plate 7 by a third edge 35. The cross-section of the third space 36 is triangular. Optionally, the second weldment is a steel plate that can be placed in the third space 36 in an approximately triangular shape. By filling the space between the second weldment and the inner wall of the third space 36 with solder, the second weldment is welded to the two connectors 32 and the connecting plate 7, thereby enhancing the connection strength between the connectors 32 and the connecting plate 7 and improving the stability of the auxiliary device.

[0049] In a preferred embodiment, the mounting body 41 has two sidewalls along the first direction with first through holes 44 communicating with the first groove. One end of the rotary drilling rig placed in the first groove 42 is a first end 51. A second through hole is provided through the first end 51 and corresponding to the first through hole 44. The axial direction of the first through hole 44 and the second through hole is the first direction. A first locking member 8 is provided through the second through hole and the two first through holes 44. The first locking member 8 is used to lock the first end 51 to the mounting body 41.

[0050] Among them, such as Figure 4 and Figure 5The first end 51 shown is one end of the drill rod 5 of the rotary drilling rig. The inner diameter of the second through hole is equal to or slightly larger than the inner diameter of the first through hole 44. During installation, the second through hole is aligned with the first through hole 44 so that the axes of the two through holes are on the same straight line. Then, the first locking member 8 is inserted to fix the rotary drilling rig and the mounting body 41.

[0051] In a preferred embodiment, the first locking member 8 includes a first steel pin 81, the first steel pin 81 including a first pin post 811 penetrating through the two first through holes and the second through hole, one end of the first pin post 811 is provided with a first baffle 812 exposed outside the mounting body 41, the outer diameter of the first baffle 812 is larger than the inner diameter of the first through hole 44, the end of the first pin post 811 exposed outside the mounting body 41 away from the first baffle 812 is provided with a third through hole 813, a first pin shaft 82 is provided through the third through hole 813, the first pin shaft 82 is used to lock the first steel pin 81.

[0052] Among them, such as Figure 4 and Figure 5 As shown, the first pin 82 includes a second baffle 821 and two locking pieces 822 disposed on one side of the second baffle 821. The outer diameter of the second baffle 821 is larger than the inner diameter of the third through hole 813. Each locking piece 822 includes a transverse portion 8221 disposed in the third through hole 813 and an extension portion 8222 exposed outside the third through hole 813, which is connected to the end of the transverse portion 8221 away from the second baffle 821. The two extension portions 8222 of different locking pieces 822 extend in opposite directions.

[0053] In a preferred embodiment, such as Figures 1-2 As shown, a fourth through hole 71 is provided through each of the connecting plates 7 and the second weldment. A fifth through hole 11 is provided at a position corresponding to each of the fourth through holes 71 in the protective sleeve 1. A second locking member is provided through the fourth through hole 71 and the corresponding fifth through hole 11. The second locking member includes a second steel pin and a matching second pin shaft. The structure of the second steel pin and the second pin shaft is the same as that of the first steel pin 81 and the first pin shaft 82, and will not be described again here. The connecting assembly and the protective sleeve 1 are fixedly connected by the second steel pin and the second pin shaft.

[0054] Example 2

[0055] Based on Example 1, this application proposes a method for using a rotary drilling rig casing extraction device, comprising the following steps:

[0056] One end of the rotary drilling rig is fixedly connected to the mounting assembly 4; specifically, the first end 51 of the drill rod 5 is placed in the first groove 42, and the second through hole and the two first through holes 44 are aligned, and the first end 51 is fixedly connected to the mounting body 41 by the first steel pin 81 and the first pin shaft 82.

[0057] The casing 1 is fixedly connected to the connecting assembly; specifically, after the first end 51 is fixedly connected to the mounting body 41, the auxiliary device is placed inside the casing 1 by the rotary drilling rig, the auxiliary device is rotated so that the fourth through hole 71 and the corresponding fifth through hole 11 are aligned, and the casing 1 and the connecting assembly are fixedly connected by the second steel pin and the second pin shaft.

[0058] Slowly rotate the rotary drilling rig to drive the casing 1 to rotate; after ensuring that all parts are firmly fixed, slowly rotate the drill rod 5 of the rotary drilling rig to drive the auxiliary device to rotate, so that the side of the casing 1 moves relative to the stratum, eliminating the original friction of the side of the casing 1.

[0059] The rotary drilling rig is lifted to remove the casing 1. The rotary drilling rig can connect to the casing 1 and remove the casing 1 with the help of the auxiliary device of this application. Compared with the prior art of removing the casing 1 by means of a crawler crane and a rotary drilling rig, this reduces equipment investment, shortens the lifting time and improves the efficiency of the cast-in-place pile.

[0060] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An auxiliary device for lifting and pulling out a casing of a rotary drilling rig, disposed inside the casing (1), wherein the axis of the casing (1) is a first axis, and the extension direction of the first axis is a third direction, characterized in that, The auxiliary device includes: The chassis (2) has a mounting surface (21) on its top surface. The connecting component includes two symmetrically arranged connecting parts (3) distributed along a first direction on the mounting surface (21), forming a first space (31) between the two connecting parts (3), and the far ends of each connecting part (3) are respectively connected to the protective sleeve (1); The mounting component (4) is located in the first space (31), its bottom is connected to the mounting surface (21), and its two ends along the second direction are connected to the connecting component. The mounting component (4) is connected to the rotary drilling rig on the side away from the chassis (2). The rotary drilling rig can drive the mounting component (4), the connecting component and the casing (1) to rotate around the first axis and move along the third direction. The second direction is perpendicular to the first direction, and the third direction is perpendicular to the second direction. The mounting assembly (4) includes a mounting body (41) disposed on the mounting surface (21); each of the connecting parts (3) includes two connectors (32), the four connectors (32) form a rhombus and form the first space (31), the two connectors (32) of the same connecting part (3) form a first included angle away from the end of the mounting assembly (4), the opening of the first included angle faces the end of the mounting assembly (4), and the two connectors (32) of the same connecting part (3) are respectively connected to the two ends of the mounting body (41) along the second direction away from the end of the protective sleeve (1); Two connectors (32) on the same side of different connecting parts (3) form a second included angle at their close ends, with the opening of the second included angle facing away from the mounting assembly (4); the connecting assembly also includes a reinforcing assembly (6) for connecting two connectors (32) on the same side of different connecting parts (3). Each of the connecting parts (3) further includes a connecting plate (7) located at the end away from the mounting component (4). The two connecting members (32) of each of the connecting parts (3) are connected to the connecting plate (7) at the end away from the mounting component (4). The end of the connecting plate (7) away from the mounting component (4) is connected to the protective sleeve (1).

2. The auxiliary device for lifting and pulling the casing of a rotary drilling rig according to claim 1, characterized in that, The mounting body (41) has a first groove (42) inside, and one end of the rotary drilling rig is placed in the first groove (42) and connected to the mounting body (41).

3. The auxiliary device for lifting and pulling the casing of a rotary drilling rig according to claim 2, characterized in that, The mounting body (41) has two side walls along the first direction with first through holes (44) communicating with the first groove (42). One end of the rotary drilling rig placed in the first groove (42) is the first end (51). A second through hole is provided through the first end (51) and corresponding to the first through hole (44). The axial direction of the first through hole (44) and the second through hole is the first direction. A first locking member (8) is provided through the second through hole and the two first through holes (44). The first locking member (8) is used to lock the first end (51) to the mounting body (41).

4. The auxiliary device for lifting and pulling the casing of a rotary drilling rig according to claim 3, characterized in that, The first locking member (8) includes a first steel pin (81), the first steel pin (81) includes a first pin (811) that passes through the two first through holes (44) and the second through hole, one end of the first pin (811) is provided with a first baffle (812) exposed outside the mounting body (41), the outer diameter of the first baffle (812) is larger than the inner diameter of the first through hole (44), the end of the first pin (811) exposed outside the mounting body (41) away from the first baffle (812) is provided with a third through hole (813), a first pin (82) is provided through the third through hole (813), and the first pin (82) is used to lock the first steel pin (81).

5. The auxiliary device for lifting and pulling the casing of a rotary drilling rig according to claim 1, characterized in that, A second space (33) is formed between the two connectors (32) on the same side of the different connecting parts (3) and the mounting body (41). A first welding piece is provided in the second space (33) to strengthen the connection strength between the connector (32) and the mounting body (41).

6. The auxiliary device for lifting and pulling the casing of a rotary drilling rig according to claim 1, characterized in that, A third space (36) is formed between the two connectors (32) of the same connecting part (3) and the connecting plate (7). A second welding component is provided in the third space (36) to strengthen the connection strength between the connector (32) and the connecting plate (7).

7. A method of using the auxiliary device for lifting and pulling the casing of a rotary drilling rig as described in any one of claims 1-6, characterized in that, Includes the following steps: One end of the rotary drilling rig is fixedly connected to the mounting assembly (4); The protective sleeve (1) is fixedly connected to the connecting assembly; Slowly rotate the rotary drilling rig to drive the casing (1) to rotate; The rotary drilling rig is lifted to remove the casing (1).

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