CN202451098U - Lead cone milling shoe - Google Patents

Abstract

The utility model discloses a lead cone milling shoe, which comprises a body. The end part of the body is provided with a lead cone; protruded triangular milling teeth are arranged around the surface of the body; one outside surface of each triangular milling tooth is provided with a hard alloy particle layer; the other outside surface of the corresponding triangular milling tooth is provided with a triangular milling tooth is provided with a hard alloy knife component; the axial rake angle of each hard alloy knife component is 10-20 degrees; and the radial rake angle beta of the corresponding hard alloy knife component is -10 to -20 degrees. As the technical scheme is adopted by the utility model, the angle of the corresponding hard alloy knife component is set to be the axial rake angle, thus, chips can be favorably formed and discharged, and the set radial negative rake angle is in favor of increasing the cutting efficiency. According to the lead cone milling shoe disclosed by the utility model, a traditional working mode of grinding is changed into a working mode of milling, a rapid and effective cutting action is performed, and the cutting efficiency is greatly increased. Moreover, cutting is stable, and chip removal is smooth. The lead cone milling shoe is more suitable for cutting downhole junks.

Description

A kind of introduction junk mill

Technical field

The utility model relates to a kind of introduction junk mill, belongs to oil drilling fishing tool technical field.

Background technology

In the oil drilling salvage, during the fracture end face out-of-flatness of junks such as the drilling rod in the shaft bottom that falls when breaking, drill collar, oil pipe, it is smooth to carry out milling with the introduction junk mill, does next step salvage again.Normal at present its principle of introduction junk mill of using is to lean on the hard alloy particle layer of built-up welding on each milling tooth and apply the acting in conjunction of weldering blade, and the fracture milling of the tubing string in the shaft bottom that falls breaking is smooth.But anterior angle, the relief angle of this introduction junk mill (like Fig. 7, shown in 8 and 9) are 0o all, and do not have chip-breaker etc., and these deficiencies have caused the cutting function poor, and efficient is lower, and short time inner blade wearing and tearing are comparatively serious, and application life is shorter.

Summary of the invention

The technical problem that the utility model will solve is: provide a kind of grinding efficiency higher, the introduction junk mill that application life is long is to overcome the deficiency of prior art.

The utility model is to constitute like this: it comprises the body 1 of the introduction junk mill that links to each other with drill string; Be provided with leading cone 2 in the end of body 1; Be centered around body 1 surface and be provided with the triangle mill teeth 3 of protrusion; Be provided with hard alloy particle layer 4 at triangle mill teeth 3 one external surfaces, be provided with carbide alloy blade insert 5 at triangle mill teeth 3 another external surfaces, the axial rake α of the blade 7 of cemented carbide member 5 is 10o～20o.

In the above-mentioned introduction junk mill, the radial rake β of carbide alloy blade insert 5 is-10o～-20o.

In the aforesaid introduction junk mill, the relief angle γ that is provided with in the outer end of carbide alloy blade insert 5 is 5o～10o.

In the aforesaid introduction junk mill, blade 7 numbers of adjacent carbide alloy blade insert 5 are respectively two and three, and one of the centre of 8 corresponding three blades 7 of the space between two blades 7.

In the aforesaid introduction junk mill, on the blade of carbide alloy blade insert 5, be provided with chip-breaker.

In the aforesaid introduction junk mill, on triangle mill teeth 3, be provided with cooling through hole 6, the angle of the external surface that the blade of the axis of cooling through hole 6 and the blade 7 of carbide alloy blade insert 5 constitutes is greater than 0o.

Owing to adopted technique scheme, with prior art relatively, the angle that the utility model is provided with the carbide alloy blade insert is axial positive rake angle (as shown in Figure 3), helps formation and discharge, the raising stock-removing efficiency of smear metal; Be provided with relief angle (as shown in Figure 3) and on blade, be provided with chip-breaker, further strengthened cutting effect; The radially negative rake (as shown in Figure 4) that is provided with can improve edge strength, improves shock resistance.The utility model becomes existing grinding into the working method of milling, has played shear action fast and effectively, and stable cutting; Adopt dislocation to arrange on the blade that constitutes the carbide alloy blade insert on the adjacent triangle mill teeth in addition, be convenient to milling and go out less iron filings, chip removal is smooth.Besides, the utility model suppresses the intensification that blade cut is brought more easily through the adjustment to cooling through hole angle, has prolonged the application life of blade.

Description of drawings:

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural representation of triangle mill teeth horizontal development;

Fig. 3 is the structural representation of the axial rake and the relief angle of carbide alloy blade insert;

Fig. 4 is the axial structural representation of the utility model;

Fig. 5 is that the A of Fig. 4 is to structural representation;

Fig. 6 is that the B of Fig. 4 is to structural representation;

Fig. 7 is the existing axial structural representation of conventional introduction junk mill;

Fig. 8 is the structural representation of existing conventional introduction junk mill tooth horizontal development;

Fig. 9 is that the C of Fig. 7 is to structural representation;

Being labeled as of accompanying drawing: the 1-body, the 2-leading cone, 3-triangle mill teeth, 4-hard alloy particle layer, 5-carbide alloy blade insert, 6-cools off through hole, 7-blade, 8-space, α-axial rake, β-radial rake, γ-relief angle.

The specific embodiment:

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

The embodiment of the utility model: the structure of the utility model is as shown in Figure 1; It comprises the body 1 of the introduction junk mill that links to each other with conventional drill string; Connect a leading cone 2 in the end of body 1 and (be the guide rod that has commercially available taper now; Play the guiding role), be centered around the triangle mill teeth 3 (as shown in Figure 2, body 1 is structure as a whole with mill teeth 3) that body 1 surface makes protrusion; At triangle mill teeth 3 one external surfaces welding hard alloy particle layer 4; At another external surfaces welding carbide alloy blade inserts 5 of triangle mill teeth 3, with the axial rake α of the blade 7 of cemented carbide member 5 (axial rake α is as shown in Figure 3, be the external surface that constitutes of the blade of the blade 7 of carbide alloy blade insert 5 with triangle mill teeth 3 on the angle of the surface formation of carbide alloy blade insert 5 is set) be made into 10o～20o.In order to improve edge strength; Improve shock resistance; Can be-10o with the radial rake β of carbide alloy blade insert 5 (radial rake β is as shown in Figure 4, is external surface and body 1 angle radially that the blade of the blade 7 of carbide alloy blade insert 5 constitutes)～-20o.In order further to make the utility model when working, help the formation and the discharge of smear metal; (relief angle γ is as shown in Figure 3 can to make relief angle γ in the outer end of carbide alloy blade insert 5; Be the angle of the outer face and the cutting plane of carbide alloy blade insert 5), and be made into 5o～10o.Go out less iron filings for the ease of milling; Blade 7 numbers of adjacent carbide alloy blade insert 5 are set to two and three respectively; And with one of the centre of corresponding three blades 7 in the space between two blades 78 (promptly like Fig. 4,5, shown in 6; Blade 7 numbers of a carbide alloy blade insert 5 are set to two, between these two blades 7 space 8 are arranged, after triangle mill teeth 3 horizontal developments with the utility model; This interstitial water is straight and even to be set to one of the centre of three blades 7 to carbide alloy blade insert 5 on the triangle mill teeth 3 that is adjacent, and realizes that dislocation arranges.Make making every blade 7 to play a role like this, further improve stock-removing efficiency, be convenient to milling and go out less iron filings.And existing conventional introduction junk mill is like Fig. 7, shown in 8 and 9; On each triangle mill teeth, all adopt the structure of three carbide chips that are arranged in parallel; Blade horizontal alignment after the horizontal development on the adjacent mill teeth is arranged, causes a blade that only is positioned at outermost in the real work usually in work).Formation and discharge in order to help smear metal further improve stock-removing efficiency, can on the blade of carbide alloy blade insert 5, offer chip-breaker (chip-breaker is that conventional groove gets final product).In order to cool off the high temperature that blade 7 brings owing to cutting; Prolong the application life of blade 7; Can on triangle mill teeth 3, offer cooling through hole 6, and the axis that will cool off through hole 6 angle that is made into the external surface that constitutes with the blade of the blade 7 of carbide alloy blade insert 5 (the cooling through hole of existing conventional introduction junk mill is parallel, as shown in Figure 7 with the external surface of the blade formation of the blade of carbide alloy blade insert greater than 0o; Do not have angle, cooling effect is relatively poor).

The embodiment of the utility model is not limited to the foregoing description, and the various variations of under the prerequisite that does not break away from the utility model aim, making all belong to the protection domain of the utility model.

Claims (6)

1. introduction junk mill; It comprises the body (1) of the introduction junk mill that links to each other with drill string; Be provided with leading cone (2) in the end of body (1); It is characterized in that: be centered around the triangle mill teeth (3) that body (1) surface is provided with protrusion; Be provided with hard alloy particle layer (4) at triangle mill teeth (3) one external surfaces, be provided with carbide alloy blade insert (5) at another external surface of triangle mill teeth (3), the axial rake (α) of the blade (7) of cemented carbide member (5) is 10o～20o.

2. introduction junk mill according to claim 1 is characterized in that: the radial rake (β) of carbide alloy blade insert (5) for-10o～-20o.

3. introduction junk mill according to claim 1 is characterized in that: the relief angle (γ) that is provided with in the outer end of carbide alloy blade insert (5) is 5o～10o.

4. introduction junk mill according to claim 1 is characterized in that: blade (7) number of adjacent carbide alloy blade insert (5) is respectively two and three, and one of the centre of corresponding three blades in the space (8) between two blades (7) (7).

5. according to claim 1,2 or 3 described introduction junk mills, it is characterized in that: on the blade of carbide alloy blade insert (5), be provided with chip-breaker.

6. according to claim 1,2 or 3 described introduction junk mills; It is characterized in that: on triangle mill teeth (3), be provided with cooling through hole (6), the angle of the external surface that the blade of the axis of cooling through hole (6) and the blade (7) of carbide alloy blade insert (5) constitutes is greater than 0o.

Images