CN203188952U

CN203188952U - Special-effect grinding shoe

Info

Publication number: CN203188952U
Application number: CN 201320158874
Authority: CN
Inventors: 马艳
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-04-02
Filing date: 2013-04-02
Publication date: 2013-09-11
Anticipated expiration: 2023-04-02

Abstract

The utility model discloses a special-effect grinding shoe. A standard drilling rod threaded hole is formed in the upper end of a body, and cutter wings are arranged on the lower end face of the body. The number of the cutter wings is 2-8, and alloy sheets are pave-welded on the front vertical faces of the cutter wings side by side. A groove is formed between every two adjacent cutter wings, and water holes are formed in the body located in the grooves. YT8 hard broken alloys and P25 hard broken alloys are welded between the grooves and the cutter wings in an overlaying mode. Since the hard broken alloys are irregular in shape and protruding in sharp corner, grinding performance is good, and the hard broken alloys which are welded in the overlaying mode are formed integrally and firmly with the cutter wings. Solid backup force of the cutter wings enhance the impact resistance of the cutter wings, combination of the cutter wings and the hard broken alloys enables the cutting resistance of the grinding shoe to be small, the wear resistance is good, irregular fish tops can be processed, and the service life of the grinding shoe is prolonged.

Description

A kind of special efficacy junk mill

Technical field

The utility model relates to the drillng operation field, particularly a kind of special efficacy junk mill.

Background technology

At present, in drilling failure is handled, junk mill is the effective tool of milling finishing top of fish, and existing junk mill mainly contains two classes: a class is to inlay the YT8 hard alloy columnar, but since alloy column limited length (smaller or equal to 10mm) thus during product milling top of fish the life-span shorter; Another kind of is with the broken alloy electrode built-up welding of YT8 hard, owing to be the irregularly shaped broken alloy of built-up welding, so cutting ability is better during milling, but because the granular carbide of deposited weldering is graininess, weld strength is low, comes off easily in the use, application life is short, hard alloy particle distribution when applying weldering is random in addition, and the direction of its cutting edge and angle also are to produce at random, are not best cutting states.

The utility model content

At the deficiency that above-mentioned prior art exists, the utility model provides a kind of special efficacy junk mill, can improve grinding operating efficiency and application life.

The technical scheme that its technical problem that solves the utility model adopts is:

A kind of special efficacy junk mill is characterized in that: be provided with standard drill rod thread hole in the body upper end, be provided with wing in the body lower surface, its quantity arranges between 2-8, and the preceding facade of wing can overlap with end circle center line, also can not overlap; Apply the seam gold plaque side by side on the preceding facade of wing, between adjacent two wings groove is set, on the body in the groove hydrophthalmia is set, this hydrophthalmia is communicated with above-mentioned screwed hole, the broken alloy of the hard of built-up welding YT8 and P25 between groove and wing.

The utility model is equivalent to add wing between the broken alloy of the broken alloy junk mill of traditional built-up welding, and the red sword of the alloy sheet on the wing, abrasion resistance are higher than the YT8 alloy, have good cutting ability.

The beneficial effects of the utility model are:

Because the broken alloy out-of-shape of hard wedge angle is outstanding, so grinding performance is good, the broken alloy of the hard of built-up welding and wing firmly form one, are the solid backing of wing, have strengthened the resistance to impact of wing; The combination of wing and the broken alloy of hard makes the cutting resistance of junk mill little, and anti-wear performance is good, can tackle irregular top of fish, has improved the application life of junk mill.

Description of drawings

Fig. 1 is the utility model cut-away illustration;

Fig. 2 is Fig. 1 upward view (having expressed the slice location of Fig. 1 among Fig. 2);

Arabic numerals are expressed as follows among the figure:

1. body, 2. screwed hole, 3. hydrophthalmia, 4. groove, the 5. broken alloy of hard, 6. alloy sheet, 7. wing.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is described in further detail:

As shown in Figure 1 and Figure 2, a kind of special efficacy junk mill is characterized in that: be provided with standard drill rod thread hole 2 in inside, body 1 upper end, be provided with wing 7 in body 1 lower surface, its quantity arranges 4, and the preceding facade of wing 7 can overlap with end circle center line, also can not overlap; Apply seam gold plaque 6 side by side on the preceding facade of wing 7, between adjacent two wings 7 groove 4 is set, on the body 1 in the groove 4 hydrophthalmia 3 is set, this hydrophthalmia 3 is communicated with above-mentioned screwed hole 2, the broken alloy 5 of the hard of built-up welding YT8 and P25 between groove 4 and wing 7.

In aboveground operation, when this junk mill was gone into the well predetermined top of fish top, turn on pump flushing top of fish bored the milling top of fish then down, every bore down to carry in 20-30 minute get into the top of fish top and bore down again and continue milling.The common fish of special efficacy junk mill milling can reach 15 meters, so the special efficacy junk mill is gone into the well after 15 meters of the millings should on put forward the mode of occupation that drilling tool checks junk mill, determine whether can continue the use of going into the well according to the milling consumption situation of junk mill.

Claims

1. special efficacy junk mill, it is characterized in that: be provided with the drill rod thread hole in inside, body upper end, be provided with wing in the body lower surface, its quantity arranges between 2-8, on the preceding facade of wing, apply the seam gold plaque side by side, between adjacent two wings groove is set, on the body in the groove hydrophthalmia is set, this hydrophthalmia is communicated with above-mentioned screwed hole, the broken alloy of the hard of built-up welding YT8 and P25 between groove and wing.

2. a kind of special efficacy junk mill as claimed in claim 1 is characterized in that: the preceding facade of described wing can with end circle central lines, can not overlap yet.

3. a kind of special efficacy junk mill as claimed in claim 1, it is characterized in that: described wing quantity arranges 4.