CN211648056U

CN211648056U - Combined tooth grinding shoe

Info

Publication number: CN211648056U
Application number: CN202020072093.XU
Authority: CN
Inventors: 李子杰; 赵波; 徐建飞; 亓智勇; 路峰; 李文明; 王海滨; 王滨
Original assignee: Huanghe Drilling Co of Sinopec Shengli Petroleum Engineering Corp
Current assignee: Huanghe Drilling Co of Sinopec Shengli Petroleum Engineering Corp
Priority date: 2020-01-14
Filing date: 2020-01-14
Publication date: 2020-10-09
Anticipated expiration: 2030-01-14

Abstract

The utility model discloses a combination tooth junk mill, including the junk mill body, top connection and cutting teeth, the lower extreme inner chamber and the top connection inner chamber of junk mill body link to each other, through asymmetric oblique water hole and asymmetric chip groove intercommunication, top connection one end passes through welded connection with the junk mill body, the other end passes through the screw thread and is connected with the drilling rod, set up the cutting groove in junk mill body upper end, the terminal surface sets up the blind hole under the cutting groove, the strip carbide of brazing in the blind hole, the cubic carbide of brazing in the cutting groove, at the interior concave surface build-up welding granule carbide in junk mill body upper end, effectively solve the short and insecure problem of cutting element welding of junk mill cutting edge, realize improving the mesh of junk mill grinding efficiency.

Description

Combined tooth grinding shoe

Technical Field

The utility model relates to an oil and gas probing class equipment technical field, concretely relates to handle milling tool of junk in pit.

Background

The conventional grinding shoe is low in cutting efficiency when grinding the underground falling object, because the blade is few and the effective length of an alloy block is short, and meanwhile, because the large-size grinding shoe is large in outer diameter, the temperature of the alloy at the center and the lower part of the grinding shoe body cannot meet the melting requirement of brazing filler metal when the hard alloy is welded, the welding strength is low, even the alloy block cannot be welded completely, the alloy block falls off too early, and the grinding efficiency is greatly reduced. There is a need for an improved conventional grind shoe that increases the cutting efficiency of the grind shoe and thus increases the success rate of treating oil well accidents.

SUMMERY OF THE UTILITY MODEL

For overcoming prior art's defect, the utility model provides a combination tooth junk mill, through brazing bar carbide 31 in

blind hole

25, 24 in the cutting groove

massive carbide

32, 2 upper ends of junk mill body 23 build-up welding granule carbide 33 cutting teeth 3 that constitute of brazing, effectively solve the cutting edge and short and the insecure problem of cutting element welding to improve the grinding efficiency of junk mill.

The utility model adopts the technical proposal that: the utility model provides a combination tooth junk mill, includes junk mill body 2, top connection 1 and cutting teeth 3, the lower extreme inner chamber 26 of junk mill body 2 links to each other with 1 inner chamber of top connection, and through asymmetric oblique water hole 22 and asymmetric chip groove 21 intercommunication, 1 one end of top connection passes through welded connection with junk mill body 2, and the other end passes through the screw thread and is connected with the drilling rod 2 upper end of junk mill body sets up cutting groove 24 the terminal surface sets up blind hole 25 under the cutting groove 24 strip carbide 31 of brazing in the blind hole 25 block-shaped carbide 32 of brazing in the cutting groove 24 the 2 upper end inner concave surface 23 build-up welding granule carbide 33 of junk mill body.

The above technical solution can be further optimized as follows:

the concave surface 23 at the upper end of the milling shoe body 2 forms an angle of 6 degrees with the plane of the upper end of the milling shoe.

The number of the chip grooves 21 is three, and the number of the inclined water holes 22 is three.

The utility model provides a combination tooth junk mill through brazing bar carbide 31 in the blind hole 25, brazing cubic carbide 32 in the

cutting groove

24, 2 upper ends inner concave surface 23 surfacing granule carbide 33 of junk mill body constitute cutting teeth 3, effectively solve the problem that the cutting edge is short and cutting element welds insecurely, realize improving the purpose of junk mill grinding efficiency.

Drawings

FIG. 1 is a cross-sectional view of the assembled combination dental mill shoe.

Fig. 2 is a sectional view of the body of the combination tooth milling shoe.

Fig. 3 is a top view of the body of the combination tooth milling shoe.

In the figure: 1-upper joint, 2-grinding shoe body, 21-chip groove, 22-inclined water hole, 23-inner concave surface, 24-cutting groove, 25-blind hole, 26-lower end inner cavity, 3-cutting tooth, 31-strip hard alloy, 32-block hard alloy and 33-particle hard alloy.

Detailed Description

Referring to fig. 1, 2 and 3, a combined tooth milling shoe comprises a milling shoe body 2, an upper connector 1 and cutting teeth 3, wherein a lower end inner cavity 26 of the milling shoe body 2 is connected with an inner cavity of the upper connector 1 and is communicated with an asymmetric chip removal groove 21 through an asymmetric inclined water hole 22, one end of the upper connector 1 is connected with the milling shoe body 2 in a welding mode, the other end of the upper connector is connected with a drill rod through threads, a cutting groove 24 is formed in the upper end of the milling shoe body 2, a blind hole 25 is formed in the lower end face of the cutting groove 24, a strip-shaped hard alloy 31 is brazed in the blind hole 25, a block-shaped hard alloy 32 is brazed in the cutting groove 24, a particle hard alloy 33 is overlaid on an inner concave face 23 in the upper end of the milling shoe body 2, the combined tooth milling shoe is connected with a drilling tool through the upper connector 1, the combined tooth milling shoe is lowered to a position of a falling object in a shaft through the drilling tool, after the combined tooth milling shoe, then, the cutting teeth 3 are washed through the grinding of the shoe working surface through the asymmetric inclined water holes 22, the cutting teeth 3 are cooled, and meanwhile, cut objects are carried out through the chip grooves 21; when the underground falling objects are ground, small bit pressure is adopted, the falling objects are ground through the granular hard alloy 33 of the inner concave surface 23, the falling objects are slowly compacted, then the bit pressure is gradually increased, the cutting depth of the cutting teeth 3 is increased, the cutting efficiency is accelerated, if the falling objects are hard or long, the falling objects are ground through the granular hard alloy 33, then the falling objects are ground through the blocky hard alloy 32, and finally the fallen objects are ground through the strip hard alloy 31 until the underground falling objects are completely ground.

The inner concave surface 23 at the upper end of the grinding shoe body 2 and the upper end plane of the grinding shoe form an angle of 6 degrees, so that the combined tooth grinding shoe is favorable for compressing falling objects for grinding, and the grinding efficiency is improved.

The number of the three chip grooves 21 is three, and the number of the three inclined water holes 22 is three, so that cooling of slurry on the cutting teeth 3 and carrying of cut objects out of a shaft are facilitated.

Claims

1. The utility model provides a combination tooth junk mill, includes junk mill body (2), top connection (1) and cutting tooth (3), lower extreme inner chamber (26) of junk mill body (2) link to each other with top connection (1) inner chamber, through asymmetric oblique water hole (22) and asymmetric chip groove (21) intercommunication, top connection (1) one end passes through welded connection with junk mill body (2), and its characterized in that is connected with the drilling rod through the screw thread to the other end: set up cutting groove (24) on grind shoe body (2) the terminal surface sets up blind hole (25) under cutting groove (24) strip carbide (31) of brazing in blind hole (25) block-shaped carbide (32) of brazing in cutting groove (24) it is in to grind shoe body (2) upper end inner concave surface (23) build-up welding granule carbide (33).

2. The combination dental mill shoe according to claim 1, wherein: the inner concave surface (23) at the upper end of the milling shoe body (2) forms an angle of 6 degrees with the plane at the upper end of the milling shoe.

3. The combination dental mill shoe according to claim 2, wherein: the number of the chip grooves (21) is three, and the number of the inclined water holes (22) is three.