Method for taking out a large-diameter reaming head of a roof drill

Abstract

The application discloses a method for taking out a large-diameter reaming cutter head of a raise borer from a well mouth, which comprises the following steps: connecting the reaming cutter head in the well mouth and a foundation beam above the well mouth through a first lifting cable; installing a first lifting frame, and lifting the reaming cutter head to a first set height by using a first hoisting device installed on the first lifting frame; removing the first lifting frame and the first hoisting device; installing a second lifting frame on the ground, and lifting the foundation beam by using a second hoisting device installed on the second lifting frame, so that the reaming cutter head is lifted above the well mouth; laying a sliding beam on the upper surface of the well mouth, and driving the foundation beam to descend by the second hoisting device, so that the reaming cutter head is placed on the sliding beam; removing the foundation beam and the second lifting frame, and then driving the reaming cutter head to slide horizontally out of the well mouth by using a traction device. According to the method for taking out the large-diameter reaming cutter head of the raise borer from the well mouth, the large-diameter reaming cutter head can be lifted out of the well mouth without using large equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mine machinery, in particular to a method for lifting a large-diameter reaming cutter of an overhole drill out of a wellhead. BACKGROUND

[0002] A common reaming cutter of an overhole drill has a small diameter and a light weight, so it can be directly lifted out of the wellhead by setting a lifting point above the wellhead. With the development of overhole drills towards large diameters, a large-diameter reaming cutter has a large diameter and a heavy weight, so it is difficult to be lifted out of the wellhead. SUMMARY

[0003] The present application aims to at least solve one of the problems in the prior art. To this end, the present application provides a method for lifting a large-diameter reaming cutter of an overhole drill out of a wellhead, which has low operation cost and high efficiency.

[0004] The method for lifting a large-diameter reaming cutter of an overhole drill out of a wellhead according to the present application comprises the following steps:

[0005] S1, connecting the reaming cutter in the wellhead and a foundation beam above the wellhead by a first lifting cable, and then disconnecting the reaming cutter and a drill rod;

[0006] S2, installing a first lifting frame, the first lifting frame being provided with a first lifting device, and connecting the first lifting device and the reaming cutter by a second lifting cable;

[0007] S3, lifting the reaming cutter to a first set height by the first lifting device, and then reconnecting the first lifting cable and the foundation beam to fix the reaming cutter at the first set height;

[0008] S4, disconnecting the second lifting cable and the reaming cutter, and removing the first lifting frame and the first lifting device;

[0009] S5, installing two second lifting frames on the ground, the two second lifting frames being arranged at two ends of the foundation beam in the length direction; the second lifting frames being provided with second lifting devices, and the second lifting devices and the foundation beam being connected by third lifting cables;

[0010] S6, lifting the foundation beam to a second set height by the second lifting devices to lift the reaming cutter above the wellhead;

[0011] S7, laying a sliding beam on the upper surface of the wellhead, and driving the foundation beam to descend by the second lifting devices to make the reaming cutter fall on the sliding beam;

[0012] S8, remove the base beam and the second lifting frame, fix the sliding beam on the ground, and then drive the reaming cutter out of the well mouth along the sliding beam by using a traction device.

[0013] According to the method for taking out the large-diameter reaming cutter from the well mouth of the roof bolter, at least the following beneficial effects are achieved:

[0014] According to the method for taking out the large-diameter reaming cutter from the well mouth, the large-diameter reaming cutter can be hoisted out of the well mouth without using large equipment, thereby reducing operation cost, compacting operation steps, and improving operation efficiency.

[0015] According to some embodiments of the present application, when the reaming cutter is at the first set height, the top of the reaming cutter is in contact with the lower surface of the base beam.

[0016] According to some embodiments of the present application, the sliding beam is provided with a plurality of sliding beams, and the plurality of sliding beams are arranged side by side.

[0017] According to some embodiments of the present application, a tray is slidably installed on the sliding beam, and the reaming cutter is placed on the tray.

[0018] According to some embodiments of the present application, at least one of the first hoisting cable, the second hoisting cable, and the third hoisting cable is a steel wire rope.

[0019] According to some embodiments of the present application, the first lifting frame is installed on the base beam.

[0020] According to some embodiments of the present application, the first lifting frame is provided with at least two first hoisting devices, and the two first hoisting devices are symmetrically arranged with respect to the reaming cutter.

[0021] According to some embodiments of the present application, the second lifting frame is provided with at least two second hoisting devices.

[0022] According to some embodiments of the present application, the first hoisting cable is connected to the base beam by a locking member.

[0023] Additional aspects and advantages of the present application will be made apparent from the following description, which is given by way of example only, and with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0024] The present application will be further described below with reference to the accompanying drawings and embodiments, in which:

[0025] Figure 1 FIG. 1 is a structural schematic view of a reaming cutter of an embodiment of the present application located in a well mouth;

[0026] Figure 2A structural schematic diagram of a first lifting frame of an embodiment of the present application;

[0027] Figure 3 A schematic diagram of a reaming cutter of an embodiment of the present application at a first set height;

[0028] Figure 4 A structural schematic diagram of a second lifting frame of an embodiment of the present application;

[0029] Figure 5 A schematic diagram of a reaming cutter of an embodiment of the present application at a second set height;

[0030] Figure 6 A structural schematic diagram of a sliding beam of an embodiment of the present application;

[0031] Figure 7 A schematic diagram of a reaming cutter of an embodiment of the present application sliding away from above a wellhead.

[0032] Reference Signs:

[0033] Wellhead 100, base beam 110, reaming cutter 120;

[0034] First lifting frame 200, first hoisting device 210;

[0035] Second lifting frame 300, second hoisting device 310;

[0036] Sliding beam 400. DETAILED DESCRIPTION

[0037] Embodiments of the present application are described in detail below with reference to the attached drawings, which show by way of example embodiments in which the same or similar elements or elements having the same or similar functions are denoted by the same reference signs and wherein:

[0038] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, etc., is based on the orientation or position relationship shown in the drawings, and is only for the purpose of facilitating the description of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0039] In the description of the present application, the plural refers to two or more. If there is a description of first, second, etc., it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the sequence of technical features indicated.

[0040] In the description of the present application, the words such as arrangement, installation, connection and the like should be understood in a broad sense, and the specific meanings of the above words in the present application can be determined by the person skilled in the art in combination with the specific content of the technical solution, unless otherwise explicitly limited.

[0041] With reference to Figures 1 to 7 The method for taking out the large-diameter reaming cutter head of the roof drill rig from the wellhead comprises the following steps:

[0042] S1, connect the reaming cutter head 120 located in the wellhead 100 and the base beam 110 above the wellhead 100 through the first lifting cable, and then disconnect the reaming cutter head 120 from the drill rod; generally, the reaming cutter head 120 is connected with the reaming driving device through the drill rod, so when taking out the reaming cutter head 120 from the wellhead 100, the reaming cutter head 120 needs to be disconnected from the drill rod first;

[0043] S2, install the first lifting frame 200, the first lifting frame 200 is provided with the first hoisting device 210, and the first hoisting device 210 and the reaming cutter head 120 are connected through the second lifting cable;

[0044] S3, use the first hoisting device 210 to lift the reaming cutter head 120 to a first set height, and then reconnect the first lifting cable and the base beam 110 to fix the reaming cutter head 120 at the first set height;

[0045] S4, disconnect the second lifting cable from the reaming cutter head 120, and remove the first lifting frame 200 and the first hoisting device 210;

[0046] S5, install two second lifting frames 300 on the ground, and the two second lifting frames 300 are arranged at both ends of the length direction of the base beam 110; the second lifting frame 300 is provided with the second hoisting device 310, and the second hoisting device 310 and the base beam 110 are connected through the third lifting cable;

[0047] S6, the second hoisting device 310 lifts the base beam 110 to a second set height, so that the reaming cutter head 120 is lifted above the wellhead 100;

[0048] S7, lay the sliding beam 400 on the upper surface of the wellhead 100, and drive the base beam 110 to descend by the second hoisting device 310, so that the reaming cutter head 120 is placed on the sliding beam 400;

[0049] S8, remove the base beam 110 and the second lifting frame 300, fix the sliding beam 400 on the ground, and then drive the reaming cutter head 120 to slide horizontally out of the wellhead 100 above by using the traction device.

[0050] In the embodiment of the present application, at least one of the first sling, the second sling and the third sling is a steel wire rope, preferably all of the first sling, the second sling and the third sling are steel wire ropes, since the large-diameter reaming cutter 120 itself has a large weight, the use of steel wire ropes can better ensure the safety of the large-diameter reaming cutter 120 to prevent the large-diameter reaming cutter 120 from falling and being damaged.

[0051] In the embodiment of the present application, the first sling is connected to the base beam 110 through a locking member. Specifically, in step S1, the first sling is preferably first wound on the base beam 110 and then fixed through the locking member. The first sling is preferably provided in multiple roots, and the multiple roots of the first sling are respectively connected to different positions of the large-diameter reaming cutter 120 to ensure that the large-diameter reaming cutter 120 remains in a horizontal state. The base beam 110 is a matching structure during the construction of the raise borer and also serves to fix the raise borer equipment, that is, the base beam 110 is designed according to the parameters of the raise borer equipment, and thus in the present embodiment, the base beam 110 is not specifically limited. In the present embodiment, the large-diameter reaming cutter 120 is used to perform the well mouth 100 operation by fully utilizing the existing structure, which can reduce the operation steps and improve the operation efficiency.

[0052] In the embodiment of the present application, the first lifting frame 200 is installed on the base beam 110. Specifically, as shown in Figure 2 The first lifting frame 200 is installed on the base beam 110 to effectively reduce the volume of the first lifting frame 200. The first lifting frame 200 can also be installed on the ground, but since the well mouth 100 itself has a large diameter, if the first lifting frame 200 is installed on the ground, the volume of the first lifting frame 200 will be larger, which will further result in a longer dismounting time. In comparison with installing the first lifting frame 200 on the ground, installing the first lifting frame 200 on the base beam 110 can greatly reduce the materials and installation time required for installing the first lifting frame 200, thereby improving the operation efficiency. At the same time, installing the first lifting frame 200 on the base beam 110 can also evenly distribute the weight of the first lifting frame 200 to the base beam 110, and the base beam 110 has a larger contact area with the ground. Therefore, installing the first lifting frame 200 on the base beam 110 can better ensure the stability of the first lifting frame 200.

[0053] In the embodiment of the present application, the first lifting frame 200 is provided with at least two first hoisting devices 210, and the two first hoisting devices 210 are symmetrically arranged about the large-diameter reaming cutter 120. Specifically, as shown in Figure 2 The first hoisting device 210 can be a manual structure such as a hand-operated hoist, or can be an electric or pneumatic power device. As known from the above, the second sling is preferably a steel wire rope, and the multiple second slings are connected to the large-diameter reaming cutter 120 to ensure that the large-diameter reaming cutter 120 is vertically raised along the well mouth 100.

[0054] In the embodiment of the present application, when the reaming cutter head 120 is at the first set height, the top of the reaming cutter head 120 is in contact with the lower surface of the foundation beam 110. Specifically, refer to Figure 3 It is shown that the specific height of the first set height does not need to be particularly accurate and can be observed by the naked eye, but it also needs to avoid the reaming cutter head 120 from being damaged due to a large collision with the foundation beam 110. If better automation is to be achieved, a detection device can also be provided to detect the height of the reaming cutter head 120 to ensure that the reaming cutter head 120 can be more accurately stopped at the first set height.

[0055] In the embodiment of the present application, the second lifting frame 300 is provided with at least two second lifting devices 310. Specifically, refer to Figure 4 It is shown that the second lifting frame 300 is installed on the ground, and the second lifting frame 300 is used to lift the foundation beam 110, so the volume of the second lifting frame 300 is obviously larger than that of the first lifting frame 200, and each second lifting frame 300 should be provided with at least two second lifting devices 310 to ensure that the foundation beam 110 is vertically lifted. The second lifting device 310 can also be a manual or electric or pneumatic device, and if the operation space is limited, the second lifting device 310 can be a chain hoist.

[0056] It should be noted that since the second lifting frame 300 is installed on the ground, attention should be paid to reinforcing the ground when installing the second lifting frame 300 to ensure the stability of the second lifting frame 300. Preferably, the second lifting frame 300 adopts a rectangular frame structure, which is easy to disassemble and assemble and has good stability.

[0057] In the embodiment of the present application, the sliding beam 400 is provided with a plurality of sliding beams 400 arranged side by side; a tray is slidingly installed on the sliding beam 400, and the reaming cutter head 120 is placed on the tray. Specifically, refer to Figure 6 , Figure 7 It is shown that the axial length of the sliding beam 400 should be at least twice the diameter of the wellhead 100 to ensure that the reaming cutter head 120 can safely slide out of the wellhead 100; the specific material of the sliding beam 400 is not limited in the embodiment, Figure 6 , Figure 7 The tray structure is not shown in the embodiment and the tray is slidingly installed on the sliding beam 400. The tray can be selected according to the actual situation.

[0058] It should be understood that generally, the sliding beam 400 also has a large weight, so the installation of the sliding beam 400 also needs to use equipment to lay, in order to facilitate the laying of the sliding beam 400, the value of the second set height can be set to be larger, so as to ensure that the reaming cutter head 120 does not affect the laying of the sliding beam 400 when the reaming cutter head 120 is at the second set height. The traction device in step S8 can select appropriate equipment according to the actual situation, so as to be able to pull the reaming cutter head 120 to slide along the sliding beam 400.

[0059] In another embodiment of the present application, the first hoisting device 210 in step S2 can also be directly connected with the first sling, and then in step S3, when the reaming cutter head 120 is lifted to the first set height, the first sling is fixed with the base beam 110, and then the first hoisting device 210 is disconnected with the first sling. This scheme can reduce the number of slings used.

[0060] According to the large-diameter reaming cutter head out-of-well mouth method for the raise-boring machine, the large-diameter reaming cutter head 120 can be hoisted out of the well mouth 100 without using large equipment, thereby reducing the operation cost, the operation steps are compact, and the operation efficiency is high.

[0061] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present application.

[0062] The embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the present application.

Claims

1. A method for taking out of a well mouth a large-diameter reaming cutter head for a roof drill, characterized by, The method comprises the following steps: S1, connecting a reamer and a foundation beam above a wellhead by a first hoist rope, and then disconnecting the reamer and a drill pipe; S2, installing a first lifting frame, the first lifting frame being provided with a first hoist device, and connecting the first hoist device and the reamer by a second hoist rope; S3, lifting the reamer to a first set height by the first hoist device, and then reconnecting the first hoist rope and the foundation beam to fix the reamer at the first set height; S4, disconnecting the second hoist rope and the reamer, and removing the first lifting frame and the first hoist device; S5, installing two second lifting frames on the ground, the two second lifting frames being arranged at two ends of the foundation beam in a length direction of the foundation beam, the second lifting frames being provided with second hoist devices, and the second hoist devices and the foundation beam being connected by a third hoist rope; S6, lifting the foundation beam to a second set height by the second hoist devices to lift the reamer above the wellhead; S7, laying a sliding beam on a top surface of the wellhead, and driving the foundation beam to descend by the second hoist devices to make the reamer fall on the sliding beam; S8, removing the foundation beam and the second lifting frames, fixing the sliding beam on the ground, and then driving the reamer to slide horizontally out of the wellhead by a traction device.

2. The method according to claim 1, characterized in that: When the reamer is at the first set height, a top of the reamer is in contact with a lower surface of the foundation beam.

3. The method according to claim 1, wherein: The sliding beam is provided with a plurality of sliding beams, and the sliding beams are arranged side by side.

4. The method according to claim 1, wherein: A tray is arranged on the sliding beam, and the reamer falls on the tray.

5. The method according to claim 1, wherein: At least one of the first hoist rope, the second hoist rope and the third hoist rope is a steel wire rope.

6. The method according to claim 1, wherein: The first lifting frame is installed on the foundation beam.

7. The method according to claim 1, wherein: The first lifting frame is provided with at least two first hoist devices, and the first hoist devices are symmetrically arranged about the reamer.

8. The method according to claim 1, wherein: The second lifting frame is provided with at least two second hoist devices.

9. The method according to claim 1, wherein: The first hoist rope and the foundation beam are connected by a locking member.

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