An electric pipe cutting device

Abstract

The present invention discloses an electric pipe cutting device, which relates to the technical field of drilling auxiliary instruments. The device includes a housing, a cutting tool, a lowering wire, a driving device, and an electric linear telescopic assembly. The cutting tool is rotatably arranged at one end of the housing, and the axes of the cutting tool and the housing coincide. The lowering wire is arranged at the other end of the housing, and the lowering wire is used to lower the housing to a specific position inside the pipe to be cut. The driving device is arranged on the housing and is connected to the cutting tool to drive the cutting tool to rotate. The electric linear telescopic assembly includes a plurality of electric linear telescopic devices, which are evenly arranged along the circumferential direction of the housing, and one end of each electric linear telescopic device is hinged to the housing. This electric pipe cutting device is simple to operate, time-saving and labor-saving, low in cost, and has a high cutting success rate.

Description

Technical Field

[0001] The present invention relates to the technical field of drilling auxiliary instruments, and particularly to an electric pipe cutting device. Background Art

[0002] During the drilling process, in case of sticking or burying of the drill pipe, it is necessary to cut drill pipes, casing pipes and other pipes at the sticking or burying part when necessary. Conventional means are mostly completed by hydraulic cutters or mechanical cutters. Both of these cutters need to transmit torque and high-pressure water through a small-diameter drill pipe connected by a top drive, which have problems such as complex operation, time-consuming and laborious, high cost, and low cutting success rate.

[0003] Therefore, how to provide a cutting device with simple operation, time-saving and labor-saving, low cost, and high cutting success rate has become an urgent problem to be solved by those skilled in the art at present. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides an electric pipe cutting device with simple operation, time-saving and labor-saving, low cost, and high cutting success rate.

[0005] To achieve the above object, the present invention provides the following solution:

[0006] The present invention provides an electric pipe cutting device, including a housing, a cutter, a lowering wire, a driving device, and an electric linear telescopic assembly. The cutter is rotatably arranged at one end of the housing, and the axes of the cutter and the housing coincide. The lowering wire is arranged at the other end of the housing, and the lowering wire is used to lower the housing to a specific position inside the pipe to be cut. The driving device is arranged on the housing, and the driving device is connected to the cutter to drive the cutter to rotate. The electric linear telescopic assembly includes a plurality of electric linear telescopic devices, and the plurality of electric linear telescopic devices are uniformly arranged along the circumferential direction of the housing, and one end of each electric linear telescopic device is hinged to the housing.

[0007] Preferably, the electric pipe cutting device further includes a protection device, and the protection device is arranged at the end of the cutter away from the housing.

[0008] Preferably, the protection device is a rubber plate or a soft steel paperboard. The protection device is of a circular structure, the protection device is coaxially arranged with the cutter, and the diameter of the protection device is larger than the diameter of the cutter.

[0009] Preferably, a slip is hinged to one end of each electric linear telescopic device away from the housing.

[0010] Preferably, the number of the electric linear telescopic assemblies is multiple, and the multiple electric linear telescopic assemblies are arranged along the axial direction of the housing.

[0011] Preferably, the electric linear telescopic assembly includes four electric linear telescopic devices uniformly arranged along the circumferential direction of the housing. Two of the four electric linear telescopic devices are collinear and located in a first plane, and the remaining two electric telescopic devices are collinear and located in a second plane. The first plane and the second plane are both perpendicular to the axis of the housing, and the first plane and the second plane do not coincide with each other.

[0012] Preferably, the lowering wire is a cable, and the driving device and each electric linear telescopic device are electrically connected to the cable.

[0013] Preferably, the driving device is a motor.

[0014] Preferably, the electric linear telescopic device is an electric cylinder.

[0015] The present invention has achieved the following technical effects compared with the prior art:

[0016] The electric pipe cutting device provided by the present invention includes a housing, a cutter, a lowering wire, a driving device, and an electric linear telescopic assembly. The cutter is rotatably arranged at one end of the housing, and the axes of the cutter and the housing coincide. The lowering wire is arranged at the other end of the housing, and the lowering wire is used to lower the housing to a specific position inside the pipe to be cut. The driving device is arranged on the housing, and the driving device is connected to the cutter to drive the cutter to rotate. The electric linear telescopic assembly includes a plurality of electric linear telescopic devices, the plurality of electric linear telescopic devices are uniformly arranged along the circumferential direction of the housing, and one end of each electric linear telescopic device is hingedly connected to the housing.

[0017] During the specific use process, after the whole device is lowered into the position to be cut in the pipe to be cut through the lowering wire, control the telescoping of each electric linear telescoping device, so that the ends of each electric linear telescoping device away from the housing are all in contact with the inner wall of the pipe to be cut. Subsequently, on the basis of keeping the ends of each electric linear telescoping device away from the housing in contact with the inner wall of the pipe to be cut, adjust the telescoping length of each electric telescoping device to adjust the center of the device (i.e., the center of the cutting tool). When the elongation lengths of each electric linear telescoping device are the same, the device is in the locked state, and the center of the cutting tool coincides with the center of the pipe. When the elongation lengths of each electric linear telescoping device are inconsistent, the device is in the cutting state, and the center of the cutting tool deviates from the center of the pipe to be cut. When the cutting tool deviates until the edge of the cutting tool contacts the inner wall of the pipe to be cut and continues to deviate, the cutting tool starts to cut the pipe to be cut. By controlling the deviation direction and degree of the cutting tool, the cutting position and cutting depth of the cutting tool can be controlled. This electric pipe cutting device does not require a top drive to connect a small-diameter drill pipe to transmit torque and high-pressure water drive, is simple to operate, time-saving and labor-saving, has low cost, and can achieve precise positioning of the cutting tool by adjusting the telescoping length of the electric linear telescoping device, greatly improving the cutting success rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the following-described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 Structural schematic diagram of the electric pipe cutting device in the cutting state provided in the embodiment of the present invention;

[0020] Figure 2 Structural schematic diagram of the electric pipe cutting device in the locked state provided in the embodiment of the present invention;

[0021] Figure 3 Schematic diagram of the setting mode of the electric linear telescoping component when the electric pipe cutting device provided in the embodiment of the present invention is in the cutting state;

[0022] Figure 4 Schematic diagram of the setting mode of the electric linear telescoping component when the electric pipe cutting device provided in the embodiment of the present invention is in the locked state.

[0023] Description of the reference numerals: 1, housing; 2, cutting tool; 3, lowering wire; 4, driving device; 5, pipe to be cut; 6, electric linear telescoping device; 7, protective device; 8, slip; 9, PLC controller. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0025] The object of the present invention is to provide an electric pipe cutting device with simple operation, time and labor saving, low cost, and high cutting success rate.

[0026] In order to make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] Refer to Figures 1-4 As shown, this embodiment provides an electric pipe cutting device, including a housing 1, a cutter 2, a lowering wire 3, a driving device 4, and an electric linear telescopic assembly. The cutter 2 is rotatably arranged at one end of the housing 1, and the axes of the cutter 2 and the housing 1 coincide. The lowering wire 3 is arranged at the other end of the housing 1. The lowering wire 3 is used to lower the housing 1 to a specific position inside the pipe 5 to be cut, that is, the position where cutting is required. The driving device 4 is arranged on the housing 1, and the driving device 4 is connected to the cutter 2 to drive the cutter 2 to rotate. The electric linear telescopic assembly includes a plurality of electric linear telescopic devices 6. The plurality of electric linear telescopic devices 6 are evenly arranged along the circumferential direction of the housing 1, and one end of each electric linear telescopic device 6 is hingedly connected to the housing 1. Different from the hydraulic cutter 2 and the mechanical cutter 2, this electric pipe cutting device does not need to lower other drilling tools for lifting and lowering, and only needs to be lowered through the lowering wire 3. Moreover, it can be accurately fixed at any position inside the pipe 5 to be cut through the electric linear telescopic device 6 and accurately perform cutting operations. This electric pipe cutting device has simple operation, saves time and labor, has low cost, and has a high cutting success rate.

[0028] During the specific use process, after the device as a whole is lowered to the position where cutting is required inside the pipe 5 to be cut through the lowering wire 3, control the telescopic movement of each electric linear telescopic device 6 so that the ends of each electric linear telescopic device 6 away from the housing 1 are all in contact with the inner wall of the pipe 5 to be cut. Subsequently, on the basis of keeping the ends of each electric linear telescopic device 6 away from the housing 1 in contact with the inner wall of the pipe 5 to be cut, adjust the telescopic length of each electric telescopic device to adjust the center of the device (i.e., the center of the cutter 2). For example, Figure 2 and Figure 4 As shown, when the elongation lengths of each electric linear telescopic device 6 are the same, the device is in a locked state, and the center of the cutter 2 coincides with the center of the pipe 5 to be cut. As Figure 1 and Figure 3As shown, when the elongation lengths of the electric linear telescopic devices 6 are inconsistent, the device is in a cutting state, and the center of the cutter 2 deviates from the center of the pipe 5 to be cut. When the cutter 2 deviates until the edge of the cutter 2 contacts the inner wall of the pipe 5 to be cut and continues to deviate, the cutter 2 starts to cut the pipe 5 to be cut. By controlling the deviation direction and degree of the cutter 2, the cutting position and depth of the cutter 2 can be controlled.

[0029] It should be noted that how to specifically control the telescoping of the electric linear telescopic device 6, how to specifically control the length of the electric linear telescopic device 6, and how to specifically control the operation of the driving device 4 all belong to the prior art and are not the focus of the protection of the present invention. For example, a PLC controller 9 is set, and the electric linear telescopic device 6 and the driving device 4 are both communicatively connected to the PLC controller 9, and the PLC controller 9 is used to control the operation of the electric linear telescopic device 6 and the driving device 4.

[0030] In this embodiment, as Figure 1 and Figure 3 shown, the electric pipe cutting device further includes a protection device 7, and the protection device 7 is arranged at one end of the cutter 2 away from the housing 1. The protection device 7 ensures that the cutter 2, the driving device 4, and the electric linear telescopic device 6 are not interfered by other impurities in the pipe 5 to be cut when the electric pipe cutting device is lowered and lifted, and plays a protective role.

[0031] In this embodiment, specifically, the protection device 7 is a rubber plate or a soft steel paperboard. The protection device 7 is of a circular structure, the protection device 7 is coaxially arranged with the cutter 2, and the diameter of the protection device 7 is larger than the diameter of the cutter 2.

[0032] In this embodiment, in order to better abut against the inner wall of the pipe 5 to be cut, a chuck 8 is hinged to one end of each electric linear telescopic device 6 away from the housing 1.

[0033] In this embodiment, in order to improve the stability of the device, the number of electric linear telescopic components is multiple, and the multiple electric linear telescopic components are arranged along the axial direction of the housing 1. In this embodiment, the number of electric linear telescopic components is specifically two, and the two electric linear telescopic components are respectively arranged at both ends of the housing 1.

[0034] In this embodiment, specifically, as Figures 1-4As shown, the electric linear telescopic assembly includes four electric linear telescopic devices 6 evenly arranged along the circumference of the housing 1. Two of the four electric linear telescopic devices 6 are collinear and in the first plane, and the remaining two electric telescopic devices are collinear and in the second plane. The first plane and the second plane are both perpendicular to the axis of the housing 1, and the first plane and the second plane do not coincide. The purpose of the non - coincidence of the first plane and the second plane is to prevent the movements of the multiple electric linear telescopic devices 6 from interfering with each other. It should be noted that the electric linear telescopic assembly includes not only four electric linear telescopic devices 6, but more than two, preferably more than three.

[0035] In this embodiment, the lowering line 3 is a cable, and the driving device 4 and each electric linear telescopic device 6 are electrically connected to the cable. The cable supplies power to the driving device 4 and each electric linear telescopic device 6 and transmits electrical signals. The above - mentioned PLC controller 9 can be communicatively connected to the driving device 4 and the electric linear telescopic device 6 through the cable. Thus, in addition to serving as a lowering device, the lowering line 3 also serves to supply power to the motor and transmit electrical signals.

[0036] In this embodiment, specifically, the driving device 4 is a motor.

[0037] In this embodiment, specifically, the electric linear telescopic device 6 is an electric cylinder. It should be noted that the electric linear telescopic device 6 is not limited to an electric cylinder, and any structure capable of realizing electric linear telescoping can be used.

[0038] The electric pipe cutting device provided in this embodiment ensures that the cutter 2 can firmly adhere to the inner wall of the pipe to be cut 5 by controlling the extension force of the electric cylinder. By controlling the extension length of the electric cylinder, the center line position of the cutter 2 can be adjusted. Continuously adjusting the extension length of the electric cylinder can enable the cutter 2 to rotate around the center of the pipe inside the pipe, thereby realizing the cutting of the pipe. This device is lowered and transmits power through a cable, and can cut at any position inside the pipe, which is efficient and convenient.

[0039] In this specification, specific examples are used to elaborate on the principle and implementation manner of the present invention. The description of the above - mentioned embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. An electric pipe cutting device, characterized in that, It includes a housing, a cutter, a lowering wire, a driving device and an electric linear telescopic assembly. The cutter is rotatably arranged at one end of the housing, and the axes of the cutter and the housing coincide. The lowering wire is arranged at the other end of the housing, and the lowering wire is used to lower the housing to a specific position inside the pipe to be cut. The driving device is arranged on the housing, and the driving device is connected to the cutter to drive the cutter to rotate. The electric linear telescopic assembly includes a plurality of electric linear telescopic devices, and the plurality of electric linear telescopic devices are evenly arranged along the circumferential direction of the housing. One end of each electric linear telescopic device is hinged to the housing. When the extended lengths of the electric linear telescopic devices are inconsistent, it is in a cutting state. The lowering wire is a cable, and the driving device and each electric linear telescopic device are electrically connected to the cable. The driving device is a motor.

2. The electric pipe cutting device according to claim 1, wherein It further includes a protection device, and the protection device is arranged at the end of the cutter away from the housing.

3. The electric pipe cutting device according to claim 2, characterized in that, The protection device is a rubber plate or a soft steel paperboard. The protection device is of a circular structure, and the protection device is coaxially arranged with the cutter, and the diameter of the protection device is larger than the diameter of the cutter.

4. The electric pipe cutting device according to claim 1, characterized in that, A slip joint is hinged to one end of each electric linear telescopic device away from the housing.

5. The electric pipe cutting device according to claim 1, wherein, The number of the electric linear telescopic assemblies is multiple, and the multiple electric linear telescopic assemblies are arranged along the axial direction of the housing.

6. The electric pipe cutting device according to claim 1, wherein, The electric linear telescopic assembly includes four electric linear telescopic devices evenly arranged along the circumferential direction of the housing. Two of the four electric linear telescopic devices are collinear and in a first plane, and the remaining two electric linear telescopic devices are collinear and in a second plane. The first plane and the second plane are both perpendicular to the axis of the housing, and the first plane and the second plane do not coincide.

7. The electric pipe cutting device according to claim 1, wherein, The electric linear telescopic device is an electric cylinder.

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