CN212003092U

CN212003092U - Fracture centering milling shoe

Info

Publication number: CN212003092U
Application number: CN201922286962.9U
Authority: CN
Inventors: 张泽丽; 沈赤卫; 张腾飞; 黄保黔; 郑廷碧; 张盼; 杨通华; 万文财; 金锋; 梁柔; 王文
Original assignee: Guizhou Gaofeng Petroleum Machinery Co Ltd
Current assignee: Guizhou Gaofeng Petroleum Machinery Co Ltd
Priority date: 2019-12-18
Filing date: 2019-12-18
Publication date: 2020-11-24
Anticipated expiration: 2029-12-18

Abstract

The utility model discloses a fracture centering milling shoe, which comprises a body (1), wherein the body (1) is divided into a connecting section (2), a milling section (3), a jet flow section (4) and a drill bit section (5) from left to right; the front end of the drill bit section (5) is in a shape of a conical flat plate (12), and a group of multi-edge hard alloy cutter blocks (9) are arranged on the edges of two sides of the conical flat plate (12); the rear section of the drill bit section (5) is of a double-blade structure, and a cooling channel (13) is formed between the two blades. The utility model discloses but hard thing in the high-efficient processing water hole and repair irregular water hole to can realize that a trip is bored and accomplish simultaneously to lead to the water hole and repair the purpose of fish head, raise the efficiency 3 ~ 5 times, shorten the operation cycle.

Description

Fracture centering milling shoe

Technical Field

The utility model relates to a fracture centering mill shoe belongs to workover tool technical field.

Background

At present, in the oil-water well action process of an oil field, when damaged fish tops and falling objects in the well cannot be normally salvaged, the damaged falling objects and the fish tops are usually ground and milled by using grinding shoes so as to be convenient for salvage of the falling objects, and when the objects which are not fallen in the well are treated, a plugging surface and a cement-clamped pipe column which cannot be drilled and removed by using a common drill bit are generally adopted, and different milling tools are generally adopted for realizing. The milling tool generally comprises a flat-bottom milling shoe, a concave-bottom milling shoe, a multi-edge milling shoe and the like, and the milling teeth of the milling shoes are generally composed of YD hard alloy or other wear-resistant materials which are overlaid. The carbide particles do not have regular front angles and cutting grooves, so the use process is low in efficiency, the operation time is long, and the production is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a fracture centering mill shoe to improve mill shoe cutting efficiency, thereby overcome the not enough of prior art existence.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model discloses a fracture centering milling shoe, which comprises a body, wherein the body is divided into a connecting section, a milling section, a jet section and a drill bit section from left to right; the front end of the drill bit section is in a conical flat plate shape, and a group of multi-edge hard alloy cutter blocks are arranged on the edges of two sides of the conical flat plate; the cross section of the rear section of the drill bit section is of a double-blade structure, and a cooling channel is formed between the two blades.

In the fracture centering milling shoe, the jet flow section is a cylinder, a blind hole is formed in the center of the jet flow section, a pair of jet flow holes uniformly distributed along the circumference are formed in the periphery of the blind hole, and one end of each jet flow hole is communicated with the blind hole; and an outlet at the other end of the jet hole is positioned between the two blades of the drill bit section.

In the fracture centering milling shoe, the cross section of the milling section is in the shape of a cross wing, a group of multi-edge hard alloy cutter blocks are arranged on the same side of each cutter wing of the cross wing, and a water hole is formed in the center of the milling section; the water hole is communicated with the blind hole of the jet flow section.

In the fracture centering milling shoe, the excircle of the connecting section is a reducing cylinder, wherein the end with the larger diameter is connected with the milling section into a whole; the center of the connecting section is provided with a water hole, and the orifice at the end with the thinner diameter of the connecting section is provided with a connecting thread for connecting a drilling tool.

In the fracture centering milling shoe, a group of multi-edge hard alloy cutter blocks on each blade of the milling section are arranged in order in a row-column manner; the tungsten carbide polygonal-prism hard alloy block is provided with a cutting groove and a cutting rake angle.

Since the technical scheme is used, the utility model discloses compare with prior art, the utility model discloses but hard thing in the high-efficient processing water hole and repair irregular water hole to can realize that one trip is run into and accomplish simultaneously to lead to the water hole and repair the purpose of fish head, raise the efficiency 3 ~ 5 times, shorten the operating cycle.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a schematic cross-sectional view A-A of FIG. 2;

FIG. 4 is a schematic cross-sectional view B-B of FIG. 2;

FIG. 5 is a schematic cross-sectional view C-C of FIG. 2;

fig. 6 is a view from direction D of fig. 1.

The labels in the figures are: 1-body, 2-connecting section, 3-milling section, 4-jet flow section, 5-drill section, 6-water hole, 7-connecting thread, 8-blade, 9-multi-edge hard alloy blade block, 10-blind hole, 11-jet flow hole, 12-conical flat plate and 13-cooling channel.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

The utility model is formed according to the following method for improving the cutting efficiency of the milling shoe, as shown in figure 1 and figure 2, the method is that a drill bit section 5 is added at the front end of a milling section 3 of a body 1; the cemented carbide blocks 9 welded on the two blades at the front end and the middle part of the drill bit section 5 are used for eliminating cement cakes and oil dirt on the inner hole wall of the pipe column, and then the milling section 3 at the rear end of the drill bit section 5 is used for milling; thereby improving the cutting efficiency of the grind shoe. The tungsten carbide polygonal cemented carbide block 9 is an insert with rake angles and cutting grooves. The tungsten carbide polygonal prism hard alloy block 9 adopts a tungsten carbide composite welding rod with the diameter of 3.2-4.8 mm and is matched with a high-strength coated nickel-silver-based brazing material for welding. The rear end of the drill bit section 5 is provided with a jet flow section 4; jet hole 11 on jet section 4 is located between two blades of drill bit section 5, cools off drill bit section 5 through spraying the coolant liquid to improve the life of drill bit.

The fracture centering milling shoe of the utility model, which is formed according to the method and is used for the method, as shown in fig. 1-6, comprises a body 1, wherein the body 1 is divided into a connecting section 2, a milling section 3, a jet flow section 4 and a drill bit section 5 from left to right; the front end of the drill bit section 5 is in a shape of a conical flat plate 12 as shown in fig. 2 and 5, and a group of multi-edge cemented carbide cutter blocks 9 are arranged on the edges of two sides of the conical flat plate 12; the rear section of the drill bit section 5 is shown in fig. 4 as a double-blade structure, and a cooling channel 13 is formed between the two blades. The jet flow section 4 is a cylinder, a blind hole 10 is arranged in the center of the jet flow section 4, a pair of jet flow holes 11 uniformly distributed along the circumference are arranged around the blind hole 10, and one end of each jet flow hole 11 is communicated with the blind hole 10; the outlet at the other end of the jet hole 11 is positioned between two blades of the drill bit section 5. The cross section of the milling section 3 is in a cross wing shape as shown in fig. 3, a group of multi-edge hard alloy cutter blocks 9 are arranged on the same side of each cutter wing 8 of the cross wing, and a water hole 6 is formed in the center of the milling section 3; the water hole 6 is communicated with the blind hole 10 of the jet flow section 4. The outer circle of the connecting section 2 is a reducing cylinder, wherein the end with the larger diameter is connected with the milling section 3 into a whole; the center of the connecting section 2 is provided with a water hole 6, and the orifice of the thinner end of the connecting section 2 is provided with a connecting thread 7 for connecting a drilling tool. A group of multi-edge hard alloy cutter blocks 9 on each cutter wing 8 of the milling section 3 are arranged in order in a row-column mode; the tungsten carbide polygonal-prism hard alloy block is provided with a cutting groove and a cutting rake angle.

The utility model discloses but hard thing in the high-efficient processing water hole and repair irregular water hole to can realize that a trip is bored and accomplish simultaneously to lead to the water hole and repair the purpose of fish head, raise the efficiency 3 ~ 5 times, shorten the operation cycle.

Claims

1. The utility model provides a fracture centering mill shoe, includes body (1), its characterized in that: the body (1) is divided into a connecting section (2), a milling section (3), a jet flow section (4) and a drill bit section (5) from left to right; the front end of the drill bit section (5) is in a shape of a conical flat plate (12), and a group of multi-edge hard alloy cutter blocks (9) are arranged on the edges of two sides of the conical flat plate (12); the rear section of the drill bit section (5) is of a double-blade structure, and a cooling channel (13) is formed between the two blades.

2. The fracture centering mill shoe of claim 1, wherein: the jet flow section (4) is a cylinder, a blind hole (10) is formed in the center of the jet flow section (4), a pair of jet flow holes (11) uniformly distributed along the circumference are formed in the periphery of the blind hole (10), and one end of each jet flow hole (11) is communicated with the blind hole (10); the outlet at the other end of the jet hole (11) is positioned between two blades of the drill bit section (5).

3. The fracture centering mill shoe of claim 1, wherein: the cross section of the milling section (3) is in the shape of a cross wing, a group of multi-edge hard alloy cutter blocks (9) are arranged on the same side of each cutter wing (8) of the cross wing, and a water hole (6) is formed in the center of the milling section (3); the water hole (6) is communicated with the blind hole (10) of the jet flow section (4).

4. The fracture centering mill shoe of claim 1, wherein: the outer circle of the connecting section (2) is a variable diameter cylinder, wherein the end with the larger diameter is connected with the milling section (3) into a whole; a water hole (6) is arranged at the center of the connecting section (2), and a connecting thread (7) for connecting a drilling tool is arranged at the orifice of the thinner end of the connecting section (2).

5. The fracture centering mill shoe of claim 3, wherein: a group of multi-edge hard alloy cutter blocks (9) on each blade (8) of the milling section (3) are arranged in order in a row-column manner; the tungsten carbide polygonal-prism hard alloy block is provided with a cutting groove and a cutting rake angle.