Orifice deformation cutting tool for directional drilling sleeve

Abstract

The utility model provides a directional drilling sleeve opening deformation cutting tool. The directional drilling sleeve opening deformation cutting tool comprises a drill rod connector, a conical barrel, a cutting plate and a cutting piece. According to the utility model, the drill rod joint and the conical barrel can be conveyed to the bottom of the sleeve through the drill rod, and the conical barrel is driven to rotate through the rotation of the drill rod. And a plurality of cutting plates are mounted on the outer side wall of the conical barrel and are uniformly arranged at intervals along the axis of the conical barrel. A plurality of cutting pieces are installed on the outer side of the cutting plate, and when the opening portion of the casing pipe deforms towards the interior of the casing pipe, a drill rod connector can be connected to the end of a drill rod to drive a conical barrel to move downwards and drive the conical barrel to rotate. The drill rod continuously drives the conical barrel to move downwards, so that the cutting piece on the outer side of the conical barrel makes contact with the deformed part, the deformed part is cut off, and therefore it is avoided that an anti-corrosion layer on the surface of a pipeline is damaged in the later period, and the service life of the pipeline is affected.

Description

Technical Field

[0001] The utility model belongs to the technical field of directional drilling construction equipment, and in particular relates to a directional drilling casing mouth deformation cutting tool. Background Art

[0002] When constructing long-distance directional pipelines in rock layers, steel casing is often used to support the covering layer above the rock layer to prevent soil collapse. During the directional drilling process, the friction between the drill rod and the casing or the collision between the reamer and the bottom casing mouth when the drill is retracted can easily cause the casing mouth at the bottom to deform. After the casing is deformed, when the pipeline is installed later, the deformed position is likely to damage the anti-corrosion layer of the pipeline. It is also difficult to detect during on-site construction, which affects the service life of the pipeline. Utility Model Content

[0003] The utility model provides a directional drilling casing mouth deformation cutting tool, which aims to solve the problem that the mouth of the casing bottom is easily deformed by the collision of the reamer during the directional drilling construction process, which is easy to damage the anti-corrosion layer of the pipeline laid later.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a directional drilling casing mouth deformation cutting tool, comprising:

[0005] Drill pipe connector;

[0006] A conical tube is fixedly mounted on the drill rod connector and is coaxially arranged with the drill rod connector, and the outer diameter of the conical tube gradually decreases in a direction away from the drill rod connector;

[0007] A plurality of cutting plates, which are arranged at intervals on the outside of the conical cylinder along the circumference of the conical cylinder;

[0008] A cutting piece is installed on the outer side of the cutting plate and protrudes from the cutting plate. The cutting piece is used to cut off the deformed position of the sleeve mouth.

[0009] In one possible implementation, a conical connector is fixedly connected to the end of the drill pipe connector, and a cylinder is fixedly connected to one end of the conical connector away from the drill pipe connector, and the outer diameter of the cylinder is the same as the maximum size of the conical connector and the conical tube.

[0010] In a possible implementation, the cylinder is coaxially arranged with the conical tube, and the outer dimension of the cylinder is smaller than the inner diameter of the sleeve and larger than the outer diameter of the pipe.

[0011] In a possible implementation, the maximum dimension of the outermost side of the cutting element from the axis of the tapered barrel is not greater than the radius of the cylinder.

[0012] In a possible implementation, the cutting plate is attached to the outer side of the conical cylinder, and the inner side surface of the cutting plate is an arc-shaped structure that matches the outer side wall of the conical cylinder.

[0013] In a possible implementation, the width direction of the cutting plate is arranged along the circumference of the conical cylinder, and a plurality of groups of cutting pieces are arranged at intervals along the width direction of the cutting plate, and two adjacent groups of cutting pieces are staggered along the length direction of the cutting plate.

[0014] In a possible implementation, along the circumference of the tapered barrel, the width of one end of the cutting element is smaller than the width of the other end.

[0015] In a possible implementation, the drill rod connector is provided with a tapered thread for connecting with the drill rod thread, and the tapered thread is coaxially arranged with the tapered barrel.

[0016] Compared with the prior art, the solution shown in the embodiment of the present application is provided with a drill pipe joint, which is used to connect to the drill pipe. The drill pipe joint and the tapered tube can be transported to the bottom of the casing through the drill pipe, and the tapered tube can be driven to rotate by the rotation of the drill pipe. A plurality of cutting plates are installed on the outer wall of the tapered tube, and the plurality of cutting plates are evenly spaced along the axis of the tapered tube. A plurality of cutting pieces are installed on the outer side of the cutting plate. When the mouth of the casing is deformed toward the inside of the casing, the drill pipe joint can be connected to the end of the drill pipe to drive the tapered tube to move downward and drive the tapered tube to rotate. The drill pipe continuously drives the tapered tube to move downward so that the cutting piece on the outside of the tapered tube body contacts the deformed part and cuts off the deformed part, thereby avoiding damage to the anti-corrosion layer on the surface of the pipeline in the later stage and affecting the service life of the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of a directional drilling casing mouth deformation cutting tool provided by an embodiment of the utility model;

[0018] Figure 2 for Figure 1 A partial enlarged view of part A in the middle.

[0019] Description of reference numerals:

[0020] 1. Drill pipe connector; 11. Taper thread; 2. Taper barrel; 3. Cutting plate; 4. Cutting piece; 5. Taper connector; 6. Cylinder. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0022] Please also read Figure 1 and Figure 2 The directional drilling casing mouth deformation cutting tool provided by the utility model is now described. The directional drilling casing mouth deformation cutting tool comprises a drill pipe connector 1, a conical barrel 2, a cutting plate 3 and a cutting piece 4; the conical barrel 2 is fixedly mounted on the drill pipe connector 1 and is coaxially arranged with the drill pipe connector 1, and the outer diameter of the conical barrel 2 gradually decreases in the direction away from the drill pipe connector 1; there are multiple cutting plates 3, and the multiple cutting plates 3 are arranged at intervals on the outside of the conical barrel 2 along the circumference of the conical barrel 2; the cutting piece 4 is mounted on the outside of the cutting plate 3 and protrudes from the cutting plate 3, and the cutting piece 4 is used to cut off the position of the casing mouth deformation.

[0023] Compared with the prior art, the directional drilling casing mouth deformation cutting tool provided in this embodiment is provided with a drill pipe joint, which is used to connect to the drill pipe. The drill pipe joint and the tapered tube 2 can be transported to the bottom of the casing through the drill pipe, and the tapered tube 2 can be driven to rotate by the rotation of the drill pipe. A plurality of cutting plates 3 are installed on the outer wall of the tapered tube 2, and the plurality of cutting plates 3 are evenly spaced along the axis of the tapered tube 2. A plurality of cutting pieces 4 are installed on the outer side of the cutting plate 3. When the mouth of the casing is deformed toward the inside of the casing, the drill pipe joint can be connected to the end of the drill pipe to drive the tapered tube 2 to move downward and drive the tapered tube 2 to rotate. The drill pipe continuously drives the tapered tube 2 to move downward so that the cutting piece 4 on the outside of the tapered tube 2 contacts the deformed part and cuts off the deformed part, thereby avoiding damage to the anti-corrosion layer on the surface of the pipeline in the later stage and affecting the service life of the pipeline.

[0024] Specifically, in this embodiment, the cutting member 4 is an alloy cutter head fixedly mounted on the outer side of the cutting plate 3 .

[0025] In some embodiments, the conical tube 2 may be formed as follows: Figure 1 , Figure 2 See the structure shown. Figure 1 , Figure 2The end of the drill pipe connector 1 is fixedly connected with a conical connector 5, and one end of the conical connector 5 away from the drill pipe connector 1 is fixedly connected with a cylinder 6, and the outer diameter of the cylinder 6 is the same as the maximum size of the conical connector 5 and the conical tube 2. The two ends of the cylinder 6 are fixedly installed between the conical connector 5 and the conical tube 2 by welding, and the conical connector 5 plays the role of connecting and transitioning between the drill pipe connector 1 and the cylinder 6. The setting of the cylinder 6 can guide the conical tube 2 to move downward and prevent the cutting piece 4 on the outer wall of the conical tube 2 from accidentally damaging the inner wall of the casing.

[0026] In some embodiments, the conical tube 2 may be formed as follows: Figure 1 , Figure 2 See the structure shown. Figure 1 , Figure 2 The cylinder 6 is coaxially arranged with the conical tube 2, and the outer dimension of the cylinder 6 is smaller than the inner diameter of the sleeve and larger than the outer diameter of the pipe. The cylinder 6 is coaxially arranged with the conical tube 2, and the outer diameter of the cylinder 6 is smaller than the inner diameter of the sleeve, and the cylinder 6 and the inner hole of the sleeve are slidably matched. And the outer diameter of the cylinder 6 is larger than the outer diameter of the pipe to be installed later. On the one hand, the cylinder 6 can guide the position of the conical tube 2 along the radial direction of the sleeve. At the same time, when the cylinder 6 can move stably inside the sleeve, the stable installation of the pipeline in the later stage can be guaranteed.

[0027] In some embodiments, the cutting element 4 may be Figure 1 , Figure 2 See the structure shown. Figure 1 , Figure 2 , the maximum dimension of the outermost side of the cutting member 4 from the axis of the tapered barrel 2 is not greater than the radius of the cylinder 6. Preferably, in this embodiment, the outer side surface of the cutting member 4 with the largest distance from the axis of the tapered barrel 2 is arranged flush with the outer side surface of the cylinder 6. This can avoid the cutting member 4 from damaging the inner wall of the casing, and at the same time, after the deformation of the bottom end of the casing is cut, it can be ensured that the cylinder 6 can pass through the bottom end of the casing to ensure the installation of the pipeline in the later stage.

[0028] Preferably, in this embodiment, one end of the cutting plate 3 is fixedly mounted on the end of the tapered barrel 2 with a smaller outer diameter, and the other end is spaced from the end of the tapered barrel 2 with a larger outer diameter, so that the distance between the outer side of the cutting piece 4 and the axis of the tapered barrel 2 is not greater than the maximum radius of the tapered barrel 2.

[0029] In some embodiments, the cutting plate 3 may be used as follows: Figure 1 , Figure 2 See the structure shown. Figure 1 , Figure 2The cutting plate 3 is fitted on the outer side of the conical cylinder 2, and the inner side of the cutting plate 3 is an arc-shaped structure that matches the outer side wall of the conical cylinder 2. The length direction of the cutting plate 3 is arranged along the generatrix of the conical cylinder 2, and the inner side of the cutting plate 3 is an arc-shaped structure that matches the outer side wall of the conical cylinder 2. The cutting plate 3 can be completely fitted on the outer side wall of the conical cylinder 2. The cutting plate 3 is then welded to the outer side of the conical cylinder 2 by welding to ensure the stability of the connection between the cutting plate 3 and the conical cylinder 2.

[0030] Specifically, in this embodiment, the outer side surface and the inner side surface of the cutting plate 3 are arranged parallel to each other.

[0031] In some embodiments, the cutting plate 3 may be used as follows: Figure 1 , Figure 2 See the structure shown. Figure 1 , Figure 2 The width direction of the cutting plate 3 is arranged along the circumference of the conical barrel 2, and multiple groups of cutting members 4 are arranged at intervals along the width direction of the cutting plate 3, and two adjacent groups of cutting members 4 are arranged staggered with each other along the length direction of the cutting plate 3. Multiple cutting members 4 in each group of cutting members 4 are arranged at intervals along the length direction of the cutting plate 3. The cutting members 4 on the two adjacent groups of cutting members 4 are arranged staggered with each other along the length direction of the cutting plate 3. Thus, when the conical barrel 2 rotates, it is ensured that the cutting members 4 on the outer wall of the cutting barrel can cut the deformed parts.

[0032] Specifically, in this embodiment, a gap smaller than the width of the cutting piece 4 is provided between two adjacent cutting pieces 4 along the length direction of the cutting plate 3 .

[0033] In some embodiments, the cutting element 4 may be Figure 1 , Figure 2 See the structure shown. Figure 1 , Figure 2 , along the circumference of the conical barrel 2, the width of one end of the cutting piece 4 is smaller than the width of the other end. The cutting piece 4 is a structure with a trapezoidal cross section. When the conical barrel 2 rotates, the end with a smaller size preferentially contacts the deformed part of the sleeve mouth. As the conical barrel 2 rotates, the contact area between the cutting piece 4 and the sleeve mouth gradually increases. The friction force when the cutting piece 4 first contacts the deformed part can be reduced. At the same time, the deformed part can be effectively cut off as the conical barrel 2 rotates.

[0034] In some embodiments, the drill pipe connector 1 may be used as follows: Figure 1 , Figure 2 See the structure shown. Figure 1 , Figure 2The drill rod connector 1 is provided with a tapered thread 11 for connecting with the drill rod thread, and the tapered thread 11 is coaxially arranged with the tapered tube 2. The end of the drill rod connector 1 is provided with a tapered thread 11 adapted to the external thread of the end of the drill rod. And the tapered thread 11 is coaxially arranged with the tapered tube 2. It can facilitate the connection and disassembly between the drill rod connector 1 and the drill rod. It is easy to operate and use.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A directional drilling casing mouth deformation cutting tool, characterized in that: include: Drill pipe connector (1); A conical cylinder (2) is fixedly mounted on the drill rod connector (1) and is coaxially arranged with the drill rod connector (1), and the outer diameter of the conical cylinder (2) gradually decreases in a direction away from the drill rod connector (1); A plurality of cutting plates (3), the plurality of cutting plates (3) being arranged at intervals along the circumference of the conical cylinder (2) on the outer side of the conical cylinder (2); The cutting piece (4) is installed on the outside of the cutting plate (3) and is arranged to protrude from the cutting plate (3). The cutting piece (4) is used to cut off the deformed position of the sleeve mouth.

2. The directional drilling casing mouth deformation cutting tool according to claim 1, characterized in that: A conical connector (5) is fixedly connected to the end of the drill rod connector (1), and a cylindrical body (6) is fixedly connected to one end of the conical connector (5) away from the drill rod connector (1), wherein the outer diameter of the cylindrical body (6) is the same as the maximum size of the conical connector (5) and the conical tube (2).

3. The directional drilling casing mouth deformation cutting tool according to claim 2, characterized in that: The cylindrical body (6) is coaxially arranged with the conical tube (2), and the outer dimension of the cylindrical body (6) is smaller than the inner diameter of the sleeve and larger than the outer diameter of the pipe.

4. The directional drilling casing mouth deformation cutting tool according to claim 3, characterized in that: The maximum dimension of the outermost side of the cutting element (4) from the axis of the tapered barrel (2) is no greater than the radius of the cylinder (6).

5. The directional drilling casing mouth deformation cutting tool according to claim 1, characterized in that: The cutting plate (3) is fitted on the outer side of the conical cylinder (2), and the inner side surface of the cutting plate (3) is an arc-shaped structure adapted to the outer side wall of the conical cylinder (2).

6. The directional drilling casing mouth deformation cutting tool according to claim 1, characterized in that: The width direction of the cutting plate (3) is arranged along the circumference of the conical cylinder (2), and a plurality of groups of cutting pieces (4) are arranged at intervals along the width direction of the cutting plate (3), and two adjacent groups of cutting pieces (4) are arranged alternately along the length direction of the cutting plate (3).

7. The directional drilling casing mouth deformation cutting tool according to claim 1, characterized in that: Along the circumference of the tapered cylinder (2), the width of one end of the cutting piece (4) is smaller than the width of the other end.

8. The directional drilling casing mouth deformation cutting tool according to claim 1, characterized in that: The drill rod connector (1) is provided with a tapered thread (11) for connecting with the drill rod thread, and the tapered thread (11) is coaxially arranged with the tapered cylinder (2).

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