Tool for repairing pit on surface of drill rod

Abstract

The utility model relates to the technical field of drill rods, in particular to a drill rod surface pit repairing tool which comprises a heating assembly, an expansion assembly and a driving assembly. The expansion assembly comprises an expansion block, an embedded block and a supporting pipe, the expansion block is used for applying pressure to the inner wall protruding part corresponding to the position of the pit in the drill rod and comprises a plurality of expansion petals distributed circumferentially, the outer side faces of the expansion petals make contact with the inner wall of the drill rod, and the embedded block is inserted into the center of the expansion block and matched with the inner side face of each expansion petals in a wedge mode; the first end of the supporting pipe abuts against one end face of the expansion block. The driving assembly comprises a pull rod and a driver, the pull rod is arranged in the supporting pipe in a penetrating mode and connected with the embedded block, the driver is located at the end opening of the drill rod and abuts against the second end of the supporting pipe, and the driver is used for driving the pull rod to move axially, so that axial movement of the embedded block is converted into radial movement of the expansion clacks.

Description

Technical Field

[0001] The utility model relates to the technical field of drill rods, in particular to a drill rod surface pit repair tool. Background Art

[0002] During the use or transportation of drill pipes, it is inevitable that they will be bumped, resulting in pits on the surface of the pipe. When the pits reach a certain level, it will affect the drilling accuracy of the drill pipe. When the pits are more serious, the drill pipe needs to be returned to the factory or even scrapped. At present, there is no simple and effective way to repair the pits, and the maintenance cost is high, which affects the progress of the operation. Utility Model Content

[0003] Based on the above problems, the purpose of the utility model is to provide a drill rod surface pit repair tool, which can achieve low-cost and simple treatment of the pit problem.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A drill pipe surface pit repair tool, comprising:

[0006] A heating component is used to heat the pits on the surface of the drill pipe;

[0007] The expansion assembly includes an expansion block, an insert and a support tube. The expansion block is used to apply pressure to the inner wall protrusion corresponding to the pit position inside the drill pipe. The expansion block includes a plurality of expansion petals distributed in a circumference. The outer side of the expansion petals contacts the inner wall of the drill pipe. The insert is inserted into the center of the expansion block and is wedge-matched with the inner side of each expansion petal. The first end of the support tube abuts against one end face of the expansion block.

[0008] The driving assembly includes a pull rod and a driver. The pull rod is inserted into the support tube and connected to the insert. The driver is located at the drill pipe port and abuts against the second end of the support tube. The driver is used to drive the pull rod to move axially, thereby converting the axial movement of the insert into radial movement of each expansion petal.

[0009] Optionally, a plurality of annular grooves are provided on the outer side surface of the expansion block, and elastic members are arranged in the annular grooves, and the elastic members are used to apply force to each expansion petal to tighten toward the center.

[0010] Optionally, the elastic member is a rubber ring or a spring ring.

[0011] Optionally, the insert is in the shape of a truncated cone, and the inner side surface of the expansion flap is an arc surface adapted to the surface of the insert.

[0012] Optionally, the minimum outer diameter of the expansion block when tightened is smaller than the inner diameter of the drill rod, and the maximum outer diameter of the expansion block when expanded is larger than the inner diameter of the drill rod.

[0013] Optionally, the heating component comprises a flame spray gun, and the flame spray gun is used to heat the pit location to above 500°C.

[0014] Optionally, the driver comprises a screw jack, the screw jack and the pull rod are transmitted via threads, and the end face size of the screw jack is larger than the inner diameter of the drill rod port.

[0015] In summary, compared with the existing technology, the drill rod surface pit repair tool targets the common pit problem of the drill rod. It uses a heating component to externally heat the pit position, and then cooperates with the expansion component to perform internal pressing on the raised part of the inner wall corresponding to the pit position, thereby improving the depression of the pit. Combined with some plastic surgery, the drill rod can be repaired to its original state, which greatly reduces the cost and difficulty of drill rod repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate and understand the technical solutions in the embodiments of the present invention, the following briefly introduces the background technology of the present invention and the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0017] Figure 1 The utility model is a schematic structural diagram of a drill rod surface pit repair tool provided in an embodiment of the present invention.

[0018] In the figure:

[0019] 1. Heating assembly; 2. Expansion block; 3. Insert block; 4. Support tube; 5. Pull rod; 6. Driver; 7. Annular groove; 8. Elastic part; 9. Pit position; 10. Raised part of the inner wall. DETAILED DESCRIPTION

[0020] In order to make the technical problems solved by the utility model, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the utility model will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1 As shown, this preferred embodiment provides a drill pipe surface pit repair tool, including a heating component 1, a tightening component and a driving component.

[0022] The heating assembly 1 is used to heat the pit position 9 on the surface of the drill rod.

[0023] Among them, the tightening assembly includes a tightening block 2, an insert block 3 and a support tube 4. The tightening block 2 is used to apply pressure to the inner wall protrusion 10 corresponding to the pit position 9 inside the drill pipe. The tightening block 2 includes a plurality of circumferentially distributed tightening petals, and the outer side surface of the tightening petals contacts the inner wall of the drill pipe. The insert block 3 is inserted into the center of the tightening block 2 and is wedge-matched with the inner side surfaces of each tightening petal. The first end of the support tube 4 abuts against one end surface of the tightening block 2.

[0024] Among them, the driving assembly includes a pull rod 5 and a driver 6. The pull rod 5 is inserted into the support tube 4 and connected to the insert 3. The driver 6 is located at the drill pipe port and abuts against the second end of the support tube 4. The driver 6 is used to drive the pull rod 5 to move axially, thereby converting the axial movement of the insert 3 into radial movement of each expansion petal.

[0025] Therefore, the drill rod surface pit repair tool aims at the common pit problem of the drill rod. The heating component 1 is used to externally heat the pit position 9, and then the expansion component is used to perform internal pressing on the inner wall protrusion 10 corresponding to the pit position 9, thereby improving the depression of the pit. In combination with some plastic surgery, the drill rod can be repaired to its original state, which greatly reduces the cost and difficulty of drill rod repair.

[0026] It should be noted that the minimum outer diameter of the expansion block 2 when tightened is smaller than the inner diameter of the drill rod, and the maximum outer diameter when expanded is larger than the inner diameter of the drill rod. The expansion block 2 should be replaced according to the inner diameter of the drill rod to meet the requirement of placing the expansion block 2 into the drill rod and applying pressure to the raised portion 10 of the inner wall.

[0027] As an optional solution, a plurality of annular grooves 7 are provided on the outer side of the expansion block 2, and elastic members 8 are arranged in the annular grooves 7. The elastic members 8 are used to apply a force to each expansion petal to tighten toward the center, so that each expansion petal can change its outer diameter in real time with the insertion depth of the insert 3.

[0028] Furthermore, the elastic member 8 is preferably a rubber ring or a spring ring.

[0029] As an optional solution, the insert 3 is truncated cone-shaped, and generally 3 to 6 expansion flaps are provided, and the inner side surface of the expansion flap is an arc surface adapted to the surface of the insert 3, so that the insert 3 and the expansion flap cooperate more smoothly.

[0030] As an optional solution, the heating component 1 is preferably a flamethrower, which is used to heat the pit position 9 to above 500°C.

[0031] As an optional solution, the driver 6 is preferably a screw jack, which is transmitted to the pull rod 5 by thread, and the end face size of the screw jack is larger than the inner diameter of the drill pipe port, so that the screw jack can support the drill pipe port and reliably drive the pull rod 5 to move axially and axially limit the support sleeve and the expansion block 2.

[0032] It should be noted that the above-mentioned optional implementation modes can be combined in any combination, and the combined implementation modes all belong to the protection scope of the present utility model.

[0033] The above embodiments are only to illustrate the basic principles and characteristics of the utility model. The utility model is not limited by the above embodiments. Without departing from the spirit and scope of the utility model, the utility model has various changes and modifications, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A drill pipe surface pit repair tool, characterized in that: include: A heating assembly (1) is used to heat the pit position (9) on the surface of the drill rod; A tightening assembly, comprising an expansion block (2), an insert block (3) and a support tube (4), wherein the expansion block (2) is used to apply pressure to a protruding portion (10) of an inner wall corresponding to the recessed position (9) inside a drill pipe, the expansion block (2) comprises a plurality of expansion petals distributed in a circumferential pattern, the outer side surface of the expansion petals contacts the inner wall of the drill pipe, the insert block (3) is inserted into the center of the expansion block (2) and is wedge-matched with the inner side surface of each expansion petal, and the first end of the support tube (4) abuts against one end surface of the expansion block (2); A driving assembly comprises a pull rod (5) and a driver (6), wherein the pull rod (5) is passed through the support tube (4) and connected to the insert (3), and the driver (6) is located at the drill pipe port and abuts against the second end of the support tube (4). The driver (6) is used to drive the pull rod (5) to move axially, thereby converting the axial movement of the insert (3) into radial movement of each of the expansion flaps.

2. The drill pipe surface pit repair tool according to claim 1, characterized in that: The outer side surface of the expansion block (2) is provided with a plurality of annular grooves (7), and an elastic member (8) is arranged in the annular groove (7). The elastic member (8) is used to give each expansion petal a force to tighten toward the center.

3. The drill pipe surface pit repair tool according to claim 2, characterized in that: The elastic member (8) is a rubber ring or a spring ring.

4. The drill pipe surface pit repair tool according to claim 1, characterized in that: The insert (3) is in the shape of a truncated cone, and the inner side surface of the expansion flap is an arc surface adapted to the surface of the insert (3).

5. The drill pipe surface pit repair tool according to claim 1, characterized in that: The minimum outer diameter of the expansion block (2) when tightened is smaller than the inner diameter of the drill rod, and the maximum outer diameter when expanded is larger than the inner diameter of the drill rod.

6. The drill pipe surface pit repair tool according to claim 1, characterized in that: The heating component (1) comprises a flamethrower, and the flamethrower is used to heat the pit position (9) to above 500°C.

7. The drill pipe surface pit repair tool according to claim 1, characterized in that: The driver (6) comprises a screw jack, the screw jack and the pull rod (5) are transmitted via threads, and the end face size of the screw jack is larger than the inner diameter of the drill rod port.

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