Hollow milling and fishing integrated tool

Abstract

The utility model discloses a hollow milling and fishing integrated tool which comprises an upper connector, a detachable containing cavity is formed in the lower portion of the upper connector, a detachable guide cylinder is arranged on the lower portion of the containing cavity, and a trimming shoe is arranged between the containing cavity and the guide cylinder. The hollow milling and fishing integrated tool is a grinding, milling and fishing tool special for the split fish head of the coiled tubing, when complex falling objects connected with oil are treated, jamming objects such as annular settled sand can be milled, the fish head can be synchronously ground in the milling process, and blocky objects connected with the oil are collected in a cavity and taken out of a well together. The structure is simple and exquisite, the performance is reliable, a good effect is achieved on complex conditions of salvaging the underground split coiled tubing, and the success rate of salvaging the coiled tubing is increased.

Description

Technical Field

[0001] The utility model relates to an oil well tool, more specifically, to a hollow milling and fishing integrated tool. Background Art

[0002] During the development of oil and gas fields, as time goes by, oil and gas wells fail underground and cannot produce normally, requiring underground operation maintenance to restore oil and gas well production. With the continuous updating and upgrading of petroleum equipment, continuous tubing has achieved good application results in drilling, side drilling, salvage, fracturing, and completion. With the development of downhole operation technology, continuous tubing repair technology has been gradually improved, and it has become more and more common in the process of continuous tubing well production and downhole operation repair. However, as time goes by, the continuous tubing left in the well will corrode and break. In the process of using continuous tubing to handle accidents, underground accidents such as continuous tubing stuck in the drill and falling off may also occur. In this case, the continuous oil needs to be treated with explosive cutting and other measures. After cutting, the remaining continuous oil and tool string are taken out. It is difficult to enter the salvage tube by using a conventional salvage tube to break the continuous oil. Utility Model Content

[0003] Based on this, it is necessary to provide a hollow milling and scooping integrated tool to address the above technical problems.

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

[0005] A hollow milling and scooping integrated tool, characterized in that the hollow milling and scooping integrated tool comprises an upper joint, a detachable storage cavity is provided at the lower part of the upper joint, a detachable guide tube is provided at the lower part of the storage cavity, and a finishing shoe is provided between the storage cavity and the guide tube.

[0006] As a preferred embodiment of the utility model, a drill rod male buckle is provided on the outer wall of the head of the upper joint, and an upper external thread is provided on the outer wall of the tail of the upper joint.

[0007] A first internal thread is provided on the inner wall of the head of the storage cavity, and a first external thread is provided on the outer wall of the tail of the storage cavity.

[0008] A second internal thread is arranged on the inner wall of the head of the guide tube, and the second internal thread matches with the first external thread.

[0009] As a preferred embodiment of the utility model, a water tank is provided inside the trimming shoe.

[0010] As a preferred embodiment of the utility model, the bottom of the trimmed shoe is provided with a first alloy milling tooth.

[0011] As a preferred embodiment of the utility model, a second alloy milling tooth is provided at the bottom of the guide tube.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] This hollow milling and fishing integrated tool provides a special tool for grinding and fishing the fish head of the split coiled tubing. When dealing with complex oil-attached objects, it can not only mill the annular sand and other obstructions, but also grind the fish head synchronously during the milling process and collect the oil-attached lumps in the cavity and bring them out of the well. It has a simple and exquisite structure and reliable performance. It has achieved good results in dealing with complex situations of split coiled tubing in the well and improved the success rate of fishing coiled tubing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the scheme in the utility model, a brief introduction is given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a schematic diagram of the cross-sectional structure of the hollow milling and scooping integrated tool of the utility model;

[0016] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure of the upper joint of the hollow milling and fishing integrated tool;

[0017] Figure 3 for Figure 1 A schematic diagram of the cross-sectional structure of the storage cavity of the hollow milling and fishing integrated tool;

[0018] Figure 4 for Figure 3 The schematic diagram of the storage cavity in the figure shows another perspective;

[0019] Figure 5 for Figure 1 A schematic diagram of the cross-sectional structure of the guide tube of the hollow milling and fishing integrated tool;

[0020] The markings in the figure are as follows: 1. Upper joint; 11. Drill rod male buckle; 12. Upper external thread; 2. Storage cavity; 21. First internal thread; 22. First external thread; 3. Dressing shoe; 31. First alloy milling tooth; 4. Guide tube; 41. Second internal thread. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0022] like Figure 1 As shown, the hollow milling and scooping integrated tool comprises an upper joint 1, a detachable receiving chamber 2 is provided at the lower part of the upper joint 1, a detachable guide tube 4 is provided at the lower part of the receiving chamber 2, and a finishing shoe 3 is provided between the receiving chamber 2 and the guide tube 4.

[0023] The trimming shoe 3 is provided with a water tank 32 therein.

[0024] like Figure 2 As shown, a drill rod male buckle 11 is provided on the outer wall of the head of the upper joint 1, and an upper external thread 12 is provided on the outer wall of the tail of the upper joint 1.

[0025] like Figure 3 and Figure 4 As shown, a first internal thread 21 is disposed on the inner wall of the head portion of the receiving cavity 2 , and a first external thread 22 is disposed on the outer wall of the tail portion of the receiving cavity 2 .

[0026] like Figure 5 As shown, a second inner thread 41 is disposed on the inner wall of the head of the guide tube 4 , and the second inner thread 41 matches with the first outer thread 22 .

[0027] It should be noted that a first alloy milling tooth 31 is provided at the bottom of the trimming shoe 3 , and a second alloy milling tooth 42 is provided at the bottom of the guide tube 4 .

[0028] It should be noted that the upper joint 1 is connected to the salvage pipe string, and the outer dimensions of the upper joint 1 are determined according to the inner diameter of the casing, and the buckle type of the upper joint 1 can also be determined according to the buckle type of the upper tool or the pipe string.

[0029] The following is an explanation of how to use the hollow milling and scooping integrated tool.

[0030] Before assembly, remove the sharp corners, burrs and foreign matter on the thread and try to connect, but do not screw it into place. Clean the thread and apply butter evenly. Manually screw in the thread. When manually screwing in, the thread should be level and aligned to ensure that the thread does not buckle when screwing in. Before entering the well, tighten the threaded connection parts according to the specified torque.

[0031] During assembly, the guide tube 4 is connected to the trimming shoe 3, and the trimming shoe 3 is connected to the upper joint 1, with a tightening torque of 3 KN•m.

[0032] When in use, the hollow milling and fishing integrated tool is lowered to 1-1.50m from the theoretical fish top and circulated for one cycle. Then, the pump is slowly lowered to the fish top to a drilling pressure of 10kN. Then, the tool is lifted up 0.20-0.30m, the tool is rotated intermittently, and the tool is slowly lowered into the fish. After entering the fish, the tool is milled at W: 10-20kN, N: 10-20r / min, Q: 8-12L / s until the fish top is broken and the oil is ground, and then milled 0.20-0.30m.

[0033] The broken oil fish top enters the guide tube 4 after being ground through the end of the guide tube 4, and reaches the dressing shoe 3, where the broken oil is cut off by milling by the dressing shoe 3 or the broken oil is twisted off by the dressing shoe waterway. Then, the remaining part of the broken oil fish top after subsequent milling pushes the cut or twisted broken oil into the storage chamber 2, and is taken out of the well together with the hollow milling and fishing integrated tool.

[0034] This hollow milling and fishing integrated tool provides a special tool for grinding and fishing the fish head of the split coiled tubing. When dealing with complex oil-attached objects, it can not only mill the annular sand and other obstructions, but also grind the fish head synchronously during the milling process and collect the oil-attached lumps in the cavity and bring them out of the well. It has a simple and exquisite structure and reliable performance. It has achieved good results in dealing with complex situations of split coiled tubing in the well and improved the success rate of fishing coiled tubing.

[0035] Without limitation to this, any changes or substitutions that are not conceived through creative work should be included in the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope defined in the claims.

Claims

1. A hollow milling and scooping integrated tool, characterized in that: The hollow milling and scooping integrated tool comprises an upper joint (1), a detachable storage chamber (2) is provided at the lower part of the upper joint (1), a detachable guide tube (4) is provided at the lower part of the storage chamber (2), and a finishing shoe (3) is provided between the storage chamber (2) and the guide tube (4).

2. The hollow milling and scooping integrated tool according to claim 1, characterized in that: A drill rod male buckle (11) is provided on the outer wall of the head of the upper joint (1), and an upper external threaded buckle (12) is provided on the outer wall of the tail of the upper joint (1). A first internal thread (21) is provided on the inner wall of the head of the storage cavity (2), and a first external thread (22) is provided on the outer wall of the tail of the storage cavity (2). A second internal thread (41) is provided on the inner wall of the head of the guide tube (4), and the second internal thread (41) cooperates with the first external thread (22).

3. The hollow milling and scooping integrated tool according to claim 1, characterized in that: The trimming shoe (3) is provided with a water tank (32) therein.

4. The hollow milling and scooping integrated tool according to claim 1, characterized in that: The bottom of the trimming shoe (3) is provided with a first alloy milling tooth (31).

5. The hollow milling and scooping integrated tool according to claim 1, characterized in that: A second alloy milling tooth (42) is provided at the bottom of the guide tube (4).

Images