Suitable for drilling tool centralizer sleeve milling fishing sleeve grinding tool

Abstract

The utility model discloses a kind of sleeve milling tools suitable for drilling tool centralizer sleeve milling fishing, including sleeve milling tool body, the sleeve milling tool body one end is connected with sleeve milling barrel;Setting in the cutting tooth structure of sleeve milling tool body relative to the sleeve milling barrel one end;The cutting tooth structure is divided into the sleeve milling cutting tooth located in the end of sleeve milling tool body, and the extrusion cutting tooth located in the position close to end of sleeve milling tool body.The sleeve milling tool of the utility model is stable when carrying out sleeve milling operation, and the rationality of structure can ensure that sleeve milling is successfully completed, and the purpose of completing sleeve milling fishing work.

Description

Technical Field

[0001] This utility model relates to the field of oil geological exploration drilling technology, and in particular to a milling tool suitable for milling and fishing with drill string stabilizers. Background Technology

[0002] In current oil and gas geological exploration drilling operations, drilling accidents frequently occur where the drill string stabilizer gets stuck and cannot be pulled up. In the past, these accidents were usually handled by shock or milling. In the process of milling to release stuck parts, a high-efficiency milling tool is an extremely important tool, as it is the key to whether the milling operation can be carried out smoothly and safely until the stuck part is released.

[0003] Therefore, based on the above-mentioned technical problems, those skilled in the art urgently need to develop a milling tool suitable for milling and retrieval of drill core stabilizers. Utility Model Content

[0004] The purpose of this utility model is to provide a milling tool suitable for milling and retrieval of drill stabilizers. When using this milling tool for milling operations, the operation is stable, and the rationality of the structure can ensure that the milling and retrieval are completed smoothly, thus achieving the purpose of milling and retrieval.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] This utility model discloses a milling tool for milling and retrieving drill stabilizers, the milling tool comprising:

[0007] A milling tool body, one end of which is connected to a milling sleeve;

[0008] A cutting tooth structure disposed on one end of the milling tool body relative to the milling sleeve;

[0009] The cutting tooth structure is divided into milling cutting teeth located at the end of the milling tool body and extrusion cutting teeth located near the end of the milling tool body.

[0010] Furthermore, the end of the grinding tool body that connects to the milling sleeve is internally threaded, and is threadedly connected to the milling sleeve through the internal thread.

[0011] Furthermore, the inner end of the milling tool body connected to the milling sleeve is machined with a double-pole female thread.

[0012] Furthermore, the end of the grinding tool body is milled with several grooves, and the milling cutting teeth are welded into the grooves at the end. Adjacent milling cutting teeth are welded together by alloy cutting solder.

[0013] Furthermore, the end of the grinding tool body near the end with the milling cutting teeth is machined with a stepped surface;

[0014] The stepped surface is welded with the extrusion cutting teeth by alloy cutting solder.

[0015] Furthermore, the milling cutter teeth are made of Kennametal alloy, and the milling cutter teeth are machined according to the milling dimensions using a wire EDM machine.

[0016] Furthermore, the alloy cutting solder between adjacent milling cutter teeth is made of Kennametal alloy solder, and the particle size of the Kennametal alloy solder is selected according to the density between the milling cutter teeth.

[0017] Furthermore, the extrusion cutting teeth are made of Kennametal alloy and are formed by wire cutting equipment.

[0018] Furthermore, the front and rear ends of the extrusion cutting teeth are welded together using cemented carbide cutting solder to form an extrusion cutting tooth seat.

[0019] In the above technical solution, the present invention provides a milling tool suitable for milling and retrieving drill stabilizers, which has the following beneficial effects:

[0020] The milling tool of this invention operates smoothly during milling operations, and its reasonable structure ensures that milling is completed smoothly, thus achieving the purpose of milling and salvage work. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0022] Figure 1 This is a front view of the milling tool for drilling stabilizer milling and fishing disclosed in the embodiments of this application;

[0023] Figure 2 This is a schematic diagram of the end of a milling tool for milling and fishing with a drill stabilizer, as disclosed in an embodiment of this application.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Milling tool body; 2. Milling cutting teeth; 3. Expansion cutting teeth;

[0026] 101. Double-pole female thread; 102. Stepped surface;

[0027] 201. Kennametal alloy solder;

[0028] 301. Carbide cutting solder. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0030] See Figures 1 to 2 As shown;

[0031] This embodiment discloses a milling tool suitable for milling and fishing with drill string stabilizers. The milling tool includes:

[0032] The grinding tool body 1 is connected at one end to the milling sleeve.

[0033] A cutting tooth structure is provided on the end of the milling tool body 1 relative to the milling sleeve;

[0034] The cutting tooth structure is divided into milling cutting teeth 2 located at the end of the milling tool body 1, and extrusion cutting teeth 3 located near the end of the milling tool body 1.

[0035] Specifically, this embodiment discloses a milling tool for drilling tool stabilizers, which integrates the functions of milling shoe, grinding shoe, and milling shoe to ensure stable milling operations. The milling tool of this embodiment includes a milling tool body 1 and a cutting tooth structure located at the front end of the milling tool body 1. The cutting tooth structure of this embodiment is divided into milling cutting teeth 2 and extrusion cutting teeth 3, and is welded with necessary alloy cutting solder.

[0036] Preferably, in this embodiment, the end of the grinding tool body 1 that connects to the milling sleeve is internally threaded, and is threadedly connected to the milling sleeve through the internal thread. To further improve the stability of the connection, in this embodiment, the end of the grinding tool body 1 that connects to the milling sleeve is internally threaded with a double-pole female thread 101.

[0037] Secondly, in this embodiment, the grinding tool body 1 and the milling sleeve are machined with a double-pole female thread 101 at one end, and are threadedly connected to the milling sleeve through the double-pole female thread 101 to improve the connection stability.

[0038] Preferably, the end of the grinding tool body 1 in this embodiment is milled with several grooves, and milling cutting teeth 2 are welded into the grooves at the end. Preferably, the milling cutting teeth 2 in this embodiment are made of Kennametal alloy imported from the United States. The size of the milling cutting teeth 2 is cut by wire cutting equipment according to the milling size. Adjacent milling cutting teeth 2 are welded together by alloy cutting solder. The alloy cutting solder used for welding is also Kennametal alloy solder 201 imported from the United States. The particle size of the alloy is selected according to the density between the milling cutting teeth 2. Generally, No. 5 alloy cutting solder is selected.

[0039] Preferably, in this embodiment, the grinding tool body 1 has a stepped surface 102 machined at the end near the end with the milling cutting teeth 2. The outer diameter of the stepped surface 102 in this embodiment is larger than the outer diameter of the end face of the welded milling cutting teeth 2.

[0040] In this embodiment, the stepped surface 102 is welded with extrusion cutting teeth 3 by alloy cutting solder. The extrusion cutting teeth 3 are made of Kennametal alloy imported from the United States and are cut by wire cutting equipment. The front and back of the extrusion cutting teeth 3 are welded with domestically produced cemented carbide cutting solder 301 to form extrusion cutting tooth seats, which increases the welding strength of the extrusion cutting teeth 3.

[0041] Specifically, when a centralizer gets stuck during drilling and cannot be released by vibration, this tool can be used for milling operations. First, connect the upper double-pole female thread 101 of the tool to the milling sleeve, and then lower the drill string. When the drill bit is about half a meter above the fish, the pump is turned on for circulation, and the rotary table is turned on to slowly continue lowering the drill bit to mill the stuck stabilizer. Because the stabilizer is inlaid with carbide cylinders, when the milling begins, the milling cutting teeth 2 at the bottom of the tool start milling along the inner end of the stabilizer and cannot mill the carbide cylinders inlaid on the stabilizer. At the same time, the extrusion cutting teeth 3 at the top of the tool also begin to radially extrude the stabilizer band after milling, so as to avoid the stabilizer band after milling squeezing the tool and causing drill blockage, which would affect the subsequent milling operation. The dense milling cutting teeth 2 and the extrusion cutting teeth 3 made of Kennametal alloy, along with the matching Kennametal alloy solder 201 and the domestically produced carbide cutting solder 301, can effectively mill the stuck stabilizer, complete the milling operation of the stuck stabilizer, and enable it to be milled out and retrieved.

[0042] In the above technical solution, the present invention provides a milling tool suitable for milling and retrieving drill stabilizers, which has the following beneficial effects:

[0043] The milling tool of this invention operates smoothly during milling operations, and its reasonable structure ensures that milling is completed smoothly, thus achieving the purpose of milling and salvage work.

[0044] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A milling tool suitable for milling and retrieving drill stabilizers, characterized in that, The grinding tool set includes: A milling tool body (1), one end of which is connected to a milling sleeve; A cutting tooth structure disposed on the milling tool body (1) at one end relative to the milling sleeve; The cutting tooth structure is divided into milling cutting teeth (2) located at the end of the milling tool body (1) and extrusion cutting teeth (3) located near the end of the milling tool body (1).

2. The milling tool for milling and retrieving drill stabilizers according to claim 1, characterized in that, The grinding tool body (1) has an internal thread at one end connected to the milling sleeve, and is threadedly connected to the milling sleeve through the internal thread.

3. The milling tool for milling and retrieving drill stabilizers according to claim 2, characterized in that, The inner end of the milling tool body (1) connected to the milling sleeve is machined with a double-pole female thread (101).

4. The milling tool for milling and retrieving drill stabilizers according to claim 1, characterized in that, The end of the grinding tool body (1) is milled with several grooves, and the milling cutting teeth (2) are welded in the grooves at the end. Adjacent milling cutting teeth (2) are welded together by alloy cutting solder.

5. The milling tool for milling and retrieving drill stabilizers according to claim 1 or 4, characterized in that, The grinding tool body (1) has a stepped surface (102) machined at the end near the end with the milling cutting teeth (2); The stepped surface (102) is welded with the extrusion cutting teeth (3) by alloy cutting solder.

6. The milling tool for milling and retrieving drill stabilizers according to claim 4, characterized in that, The milling cutter (2) is made of Kennametal alloy and is machined by wire cutting equipment according to the milling dimensions.

7. The milling tool for milling and retrieving drill stabilizers according to claim 6, characterized in that, The alloy cutting solder between adjacent milling cutter teeth (2) is made of Kennametal alloy solder (201), and the particle size of Kennametal alloy solder (201) is selected according to the density between the milling cutter teeth (2).

8. The milling tool for milling and retrieving drill stabilizers according to claim 5, characterized in that, The extrusion cutting teeth (3) are made of Kennametal alloy and are formed by wire cutting equipment.

9. The milling tool for milling and retrieving drill stabilizers according to claim 8, characterized in that, The front and rear ends of the extrusion cutting tooth (3) are welded together by cemented carbide cutting solder (301) to form an extrusion cutting tooth seat.

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