Method for enabling large-diameter reaming cutter head to go out of well mouth for raise boring machine

Abstract

The invention discloses a method for enabling a large-diameter reaming cutterhead to go out of a well mouth for a raise boring machine. The method comprises the following steps that the reaming cutterhead located in the well mouth and a foundation beam located above the well mouth are connected through a first sling; a first lifting frame is installed, and the chambering cutter head is lifted to a first set height through a first hoisting device installed on the first lifting frame; the first lifting frame and the first hoisting device are dismantled; a second lifting frame is installed on the ground, and the foundation beam is lifted through a second hoisting device installed on the second lifting frame so that the reaming cutter head can be lifted to the position above the well opening; a sliding beam is laid on the upper surface of the wellhead, and a second hoisting device drives the foundation beam to descend so that the reaming cutter head can fall on the sliding beam; and the foundation beam and the second lifting frame are dismantled, and then a traction device is used for driving the chambering cutter head to horizontally slide out of the wellhead along the sliding beam. According to the method for taking the large-diameter reaming cutter head out of the well mouth for the raise boring machine, the large-diameter reaming cutter head can be lifted out of the well mouth without adopting large equipment.

Description

Technical Field

[0001] The invention relates to the technical field of mining machinery, and in particular to a method for a large-diameter hole-reaming cutter head for a raise boring machine to exit a wellhead. Background Art

[0002] The diameter of the reaming cutterhead used in ordinary raise drilling rigs is small and light, so the reaming cutterhead can be directly lifted out by setting a lifting point above the wellhead. As the raise drilling rig develops towards larger diameters, the large-diameter cutterhead has a large diameter and a heavy weight, making it difficult to move out of the wellhead. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a method for lifting a large diameter reaming cutter head out of a wellbore for a raise boring machine, which is used to lift the large diameter reaming cutter head out of the wellbore, with low operation cost and high efficiency.

[0004] A method for exiting a wellhead using a large-diameter reaming cutterhead for a raise boring machine according to an embodiment of the present invention comprises the following steps:

[0005] S1, connecting the reaming cutter head located in the wellhead and the foundation beam above the wellhead through a first sling, and then disconnecting the reaming cutter head from the drill pipe;

[0006] S2, installing a first lifting frame, wherein the first lifting frame is equipped with a first lifting device, and the first lifting device and the reaming cutter head are connected by a second sling;

[0007] S3, using the first lifting device to lift the reaming cutter head to a first set height, and then reconnecting the first sling and the foundation beam to fix the reaming cutter head at the first set height;

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

[0009] S5. Install two second lifting frames on the ground, the two second lifting frames are respectively arranged at both ends of the foundation beam in the length direction; the second lifting frames are installed with a second lifting device, and the second lifting device and the foundation beam are connected by a third lifting cable;

[0010] S6, the second lifting device lifts the foundation beam to a second set height, so that the reaming cutter head is lifted above the wellhead;

[0011] S7, laying a sliding beam on the upper surface of the wellhead, and the second lifting device drives the foundation beam to descend so that the reaming cutter head falls on the sliding beam;

[0012] S8. Remove the foundation beam and the second lifting frame, fix the sliding beam to the ground, and then use a traction device to drive the reaming cutter head to slide horizontally along the sliding beam out from above the wellhead.

[0013] The method for exiting a wellhead with a large-diameter reaming cutterhead for a raise drilling rig according to an embodiment of the present invention has at least the following beneficial effects:

[0014] Through the above-mentioned wellhead exit method, the large-diameter reaming cutter head can be lifted out of the wellhead without using large equipment, thereby reducing the operation cost, making the operation steps compact and the operation efficiency high.

[0015] According to some embodiments of the present invention, when the reaming cutter disc is at the first set height, the top of the reaming cutter disc contacts the lower surface of the foundation beam.

[0016] According to some embodiments of the present invention, a plurality of sliding beams are provided, and the plurality of sliding beams are arranged in parallel.

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

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

[0019] According to some embodiments of the present invention, the first lifting frame is mounted on the foundation beam.

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

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

[0022] According to some embodiments of the present invention, the first sling is connected to the foundation beam via a locking member.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0025] Figure 1 This is a schematic diagram of the structure of the reaming cutter head in the wellhead according to an embodiment of the present invention;

[0026] Figure 2It is a structural schematic diagram of a first lifting frame according to an embodiment of the present invention;

[0027] Figure 3 It is a schematic diagram of the reaming cutter disc according to the embodiment of the present invention when it is located at a first set height;

[0028] Figure 4 It is a structural schematic diagram of a second lifting frame according to an embodiment of the present invention;

[0029] Figure 5 It is a schematic diagram of the reaming cutter disc according to the embodiment of the present invention when it is located at a second set height;

[0030] Figure 6 It is a structural schematic diagram of a sliding beam according to an embodiment of the present invention;

[0031] Figure 7 It is a schematic diagram of the reaming cutter disc according to an embodiment of the present invention when it slides away from the wellhead.

[0032] Figure Number:

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

[0034] A first lifting frame 200 and a first lifting device 210;

[0035] A second lifting frame 300 and a second lifting device 310;

[0036] Sliding beam 400. DETAILED DESCRIPTION

[0037] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0038] In the description of the present invention, it should be understood that descriptions involving orientation, such as orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0039] In the description of the present invention, "a plurality" means more than two. If there is a description of "first" or "second", 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 the indicated technical features or implicitly indicating the order of the indicated technical features.

[0040] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0041] Reference Figures 1 to 7 The method for exiting a wellhead with a large-diameter reaming cutter head for a raise drilling rig according to an embodiment of the present invention comprises the following steps:

[0042] S1. Connect the reaming cutter head 120 located in the wellhead 100 and the foundation beam 110 above the wellhead 100 through a first sling, and then disconnect the reaming cutter head 120 from the drill pipe. Generally speaking, the reaming cutter head 120 is connected to the reaming drive device through the drill pipe, so when the reaming cutter head 120 is taken out from the wellhead 100, the reaming cutter head 120 needs to be disconnected from the drill pipe first.

[0043] S2, installing a first lifting frame 200, the first lifting frame 200 is equipped with a first lifting device 210, and the first lifting device 210 and the reaming cutter head 120 are connected by a second sling;

[0044] S3, using the first lifting device 210 to lift the reaming cutter head 120 to a first set height, and then reconnecting the first sling and the foundation beam 110 to fix the reaming cutter head 120 at the first set height;

[0045] S4, disconnecting the second sling from the reaming cutter head 120, and removing the first lifting frame 200 and the first lifting device 210;

[0046] S5. Install two second lifting frames 300 on the ground, and the two second lifting frames 300 are respectively arranged at both ends of the length direction of the foundation beam 110; the second lifting frames 300 are installed with a second lifting device 310, and the second lifting device 310 and the foundation beam 110 are connected by a third lifting rope;

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

[0048] S7, laying a sliding beam 400 on the upper surface of the wellhead 100, and the second lifting device 310 drives the foundation beam 110 to descend, so that the reaming cutter head 120 falls on the sliding beam 400;

[0049] S8, dismantle the foundation beam 110 and the second lifting frame 300, fix the sliding beam 400 to the ground, and then use the traction device to drive the reaming cutter head 120 to slide horizontally along the sliding beam 400 out from above the wellhead 100.

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

[0051] In an embodiment of the present invention, 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 around the base beam 110, and then the first sling is fixed by a locking member. Preferably, a plurality of first slings are provided, and the plurality of first slings are respectively connected to different positions of the reaming cutter disc 120 to ensure that the reaming cutter disc 120 remains in a horizontal state. The base beam 110 is a supporting structure during the construction of the sky drilling rig, and also serves to fix the sky drilling rig equipment, that is, the base beam 110 is designed according to the parameters of the sky drilling rig equipment, so it is no longer specifically limited in this embodiment. The large-diameter reaming cutter disc 120 in this embodiment can reduce the operation steps and improve the operation efficiency by making full use of the existing structure to carry out the reaming cutter disc 120 out of the wellhead 100 operation.

[0052] In the embodiment of the present invention, the first lifting frame 200 is installed on the base beam 110. Figure 2 As shown, the first lifting frame 200 is installed on the foundation beam 110, which can effectively reduce the volume of the first lifting frame 200. The first lifting frame 200 can also be installed on the ground, but because the wellhead 100 itself has a larger aperture, if the first lifting frame 200 is installed on the ground, the volume of the first lifting frame 200 will be larger, which will lead to a longer disassembly and assembly time. Compared with installing the first lifting frame 200 on the ground, installing the first lifting frame 200 on the foundation beam 110 can greatly reduce the materials and installation time required for installing the first lifting frame 200, thereby improving the working efficiency. At the same time, the first lifting frame 200 is installed on the foundation beam 110, and the weight of the first lifting frame 200 can be evenly distributed on the foundation beam 110. The contact area between the foundation beam 110 and the ground is larger. The first lifting frame 200 is installed on the foundation beam 110, which can better ensure the stability of the first lifting frame 200.

[0053] In the embodiment of the present invention, the first lifting frame 200 is equipped with at least two first lifting devices 210, and the two first lifting devices 210 are symmetrically arranged about the reaming cutter head 120. Figure 2 As shown, the first lifting device 210 can be a manual structure, such as a hand winch, or an electric, pneumatic or other power device; as can be seen from the above, the second sling is preferably a wire rope, which is connected to the reaming cutter disc 120 through multiple second slings to ensure that the reaming cutter disc 120 rises vertically along the wellhead 100.

[0054] In an embodiment of the present invention, when the reaming cutter head 120 is at the first set height, the top of the reaming cutter head 120 contacts the lower surface of the foundation beam 110. Figure 3 As shown, 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 is also necessary to avoid a large collision between the reaming cutter disc 120 and the foundation beam 110, which may cause damage to the reaming cutter disc 120. In order to better realize the automated operation, a detection device may be provided to detect the height of the reaming cutter disc 120 to ensure that the reaming cutter disc 120 can stay at the first set height more accurately.

[0055] In the embodiment of the present invention, the second lifting frame 300 is equipped with at least two second lifting devices 310. Figure 4 As shown, since the second lifting frame 300 is installed on the ground and is used to lift the foundation beam 110, the volume of the second lifting frame 300 is significantly larger than that of the first lifting frame 200, and each second lifting frame 300 should be equipped with at least two second lifting devices 310 to ensure that the foundation beam 110 is lifted vertically. The second lifting device 310 can also be manual, electric, or pneumatic. If the operating space is limited, the second lifting device 310 can be a hand chain hoist or other equipment.

[0056] It should be noted that since the second lifting frame 300 is installed on the ground, when installing the second lifting frame 300, it is also necessary to reinforce the ground 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 invention, there are multiple sliding beams 400, and the multiple sliding beams 400 are arranged in parallel; a tray is slidably mounted on the sliding beams 400, and the reaming cutter head 120 is placed on the tray. Figure 6 , Figure 7 As shown, the axial length of the sliding beam 400 should be at least twice the diameter of the wellhead 100, so as to ensure that the reaming cutter head 120 can slide out safely from above the wellhead 100; the specific material of the sliding beam 400 is not specifically limited in this embodiment. Figure 6 , Figure 7 The tray structure is not shown in the figure. The tray is slidably mounted on the sliding beam 400. The tray can select a suitable structure according to actual conditions.

[0058] It should be understood that, generally speaking, the sliding beam 400 also has a large weight, so the installation of the sliding beam 400 also needs to be laid with equipment. In order to facilitate the laying of the sliding beam 400, the value of the second set height can be set larger to ensure that when the reaming cutter head 120 is at the second set height, the reaming cutter head 120 will not affect the laying of the sliding beam 400. The traction device in step S8 can select appropriate equipment according to actual conditions, 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 invention, the first lifting device 210 in step S2 may also be directly connected to the first sling, and then in step S3, when the reaming cutter head 120 rises to the first set height, the first sling is first fixed to the base beam 110, and then the first lifting device 210 and the first sling are detached; this solution can reduce the number of slings used.

[0060] According to the method for lifting a large diameter reaming cutter disc out of a wellhead for a shaft drilling rig according to an embodiment of the present invention, the large diameter reaming cutter disc 120 can be lifted out of the wellhead 100 without using large equipment, thereby reducing operating costs, making the operating steps compact and the operating efficiency high.

[0061] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0062] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A method for a large diameter hole enlarging cutter head for a raise drilling rig to exit a wellhead, characterized in that: The following steps are involved: S1, connecting the reaming cutter head located in the wellhead and the foundation beam above the wellhead through a first sling, and then disconnecting the reaming cutter head from the drill pipe; S2, installing a first lifting frame, wherein the first lifting frame is equipped with a first lifting device, and the first lifting device and the reaming cutter head are connected by a second sling; S3, using the first lifting device to lift the reaming cutter head to a first set height, and then reconnecting the first sling and the foundation beam to fix the reaming cutter head at the first set height; S4, disconnecting the second sling from the reaming cutter head, and removing the first lifting frame and the first lifting device; S5. Install two second lifting frames on the ground, the two second lifting frames are respectively arranged at both ends of the foundation beam in the length direction; the second lifting frames are installed with a second lifting device, and the second lifting device and the foundation beam are connected by a third lifting cable; S6, the second lifting device lifts the foundation beam to a second set height, so that the reaming cutter head is lifted above the wellhead; S7, laying a sliding beam on the upper surface of the wellhead, and the second lifting device drives the foundation beam to descend so that the reaming cutter head falls on the sliding beam; S8. Remove the foundation beam and the second lifting frame, fix the sliding beam to the ground, and then use a traction device to drive the reaming cutter head to slide horizontally along the sliding beam out from above the wellhead.

2. The method for removing a large diameter hole enlarging cutter disc from a wellbore according to claim 1, characterized in that: When the reaming cutter disc is at the first set height, the top of the reaming cutter disc contacts the lower surface of the foundation beam.

3. The method for removing a large diameter hole enlarging cutter disc from a wellbore according to claim 1, characterized in that: There are a plurality of sliding beams, and the plurality of sliding beams are arranged in parallel.

4. The method for removing a large diameter hole enlarging cutter disc from a wellbore according to claim 1, characterized in that: A tray is slidably mounted on the sliding beam, and the reaming cutter disc is placed on the tray.

5. The method for removing a large diameter hole enlarging cutter disc from a wellbore according to claim 1, characterized in that: At least one of the first sling, the second sling and the third sling is a steel wire rope.

6. The method for removing a large diameter hole enlarging cutter disc from a wellbore according to claim 1, characterized in that: The first lifting frame is installed on the foundation beam.

7. The method for removing a large diameter hole enlarging cutter disc from a wellbore according to claim 1, characterized in that: The first lifting frame is equipped with at least two of the first lifting devices, and the two first lifting devices are symmetrically arranged with respect to the reaming cutter disc.

8. The method for removing a large diameter hole enlarging cutter head from a wellbore according to claim 1, characterized in that: The second lifting frame is equipped with at least two second lifting devices.

9. The method for removing a large diameter hole enlarging cutter head from a wellbore according to claim 1, characterized in that: The first sling is connected to the foundation beam via a locking member.

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