CN203905821U

CN203905821U - Slime fishtail drill bit

Info

Publication number: CN203905821U
Application number: CN201420349894.0U
Authority: CN
Inventors: 李晓晖; 张慧杰; 王慧玲; 郑元满; 孔令沪; 杨宏伟; 王克虎; 满国祥; 任立坤; 程林; 朱立强; 张强; 崔杰
Original assignee: HEBEI SHITAN MACHINERY MANUFACTURING Co Ltd
Current assignee: HEBEI SHITAN MACHINERY MANUFACTURING Co Ltd
Priority date: 2014-06-28
Filing date: 2014-06-28
Publication date: 2014-10-29
Anticipated expiration: 2024-06-28

Abstract

The utility model provides a slime fishtail drill bit. The slime fishtail drill bit comprises a drill bit body, a joint body, a fishtail-like wing piece, upper wing pieces and middle wing pieces, wherein the drill bit body is a metal hollow tube, the number of the upper wing pieces is three, the upper wing pieces are uniformly distributed at the upper part of the drill bit body, the number of the middle wing pieces is two, the middle wing pieces are uniformly distributed at the middle part of the drill bit body, the upper wing pieces and the middle wing pieces are inclined to the lower part and the side parts, form the included angels of 52 degrees with the vertical line of the drill bit body and form the included angles of 15 degrees with the center line of the drill bit body, and a reinforcing rib is arranged on one side of each upper wing piece; the tail part of the fishtail-like wing piece is bifurcated to the two sides to from the shape of Y, the middle part of the bifurcated part of the tail part is concave inwards to form a circular arc-shaped cut surface, two grout outlets are formed at the upper part of the fishtail wing piece, angle steel is welded at the center of each grout outlet, and hard alloys are arranged on the circular arc-shaped cut surface and the outer side of the fishtail wing piece. Compared with the prior art, the slime fishtail drill bit provided by the utility model has the advantages of strong capability of cutting and breaking soil and stone, high drilling speed, good drilling effect and capability of greatly reducing the well-drilling cost.

Description

Foundry loam fish tail bit

Technical field

The utility model relates to a kind of boring tool, specifically a kind of foundry loam fish tail bit.

Background technology

At present, people, in the upper formation drilling process to high-ductility, soft, often use drag bit to creep into, but because drag bit bearing area is large, the moment of torsion bearing is large, and the load that rig bears is large.In the time creeping into the staggered hard interbedded layer of hard formation or soft or hard, drill bit incision difficulty, drilling efficiency is low, is therefore necessary to provide a kind of new drill bit to solve above-mentioned technical problem.

Summary of the invention

The technical problem that the utility model solves is to provide a kind of new foundry loam fish tail bit, and the broken native stone ability of its cutting is strong, and rate of penetration is fast, holes effective, can greatly reduce drilling cost.

For solving the problems of the technologies described above, the utility model adopts following technical scheme: a kind of foundry loam fish tail bit, by bit body, the fittings body that bit body is connected with drilling rod, be positioned at the imitative fish tail fin of bit body bottom, be arranged in upper panel and the fin composition at bit body middle part, described bit body is metal hollow pipe, totally 3 of described upper panels, be uniformly distributed in bit body top, totally 2 of described middle fins, be uniformly distributed in bit body middle part, upper panel and middle fin are all downwards and tilt to side, become 52o angle with bit body vertical line, become 15o angle with bit body center line, upper panel length is 1.5-1.8 times of wing centre section sheet length, wing centre section sheet length is 1.3-1.6 times of imitative fish tail fin width, fish tail fin width is 1.6-2 times of bit body diameter, one side of described upper panel is provided with reinforcing rib.

As the further improvement of the technical program, described imitative fish tail fin adopts antifriction alloy steel plate to make, afterbody forms Y-shaped to both sides bifurcated, in the middle of afterbody bifurcation, concave, form circular arc cutting face, fish tail fin top is provided with two grout outlets of opposite direction, and grout outlet becomes 45o angle with bit body vertical line, grout outlet center is welded with angle steel, and circular arc cutting face and fish tail fin outside are provided with carbide alloy.

As the further improvement of the technical program, described upper panel and middle fin are all carbide alloy and the large anistree alloy compositions in blade base side by blade base and welding-on, carbide alloy is distributed in the outer cutting face of blade base, and large anistree alloy is distributed in the He Xia cutting face, outer cutting face of blade base.

Compared with prior art, the imitative fish tail tab portion of the utility model foundry loam fish tail bit has the ability of the broken native stone of higher cutting, intersects with the carbide alloy size of upper panel and middle fin, forms ladder fragmentation, has changed the multi-dimensional stress state of the soil body.And the distribution arrangement of the grout outlet of imitative fish tail fin is conducive to chip removal, in closely knit silty clay, sandy silt and powder fine sand, there is good drilling effect, there is the characteristic of fish tail and fin drill bit simultaneously, comparatively adapt to creeping into of bad ground, revolution stable cutting, the continuous 45o pulp of grout outlet, effectively washes away landwaste, prevent the wearing and tearing of landwaste to drilling tool, thereby improved rock drillability.Upper panel, middle fin are combined with imitative fish tail fin, once creep into and can obtain larger well bore diameter, avoid secondary reaming hole, have both shortened drilling period, have reduced again drilling cost.

Brief description of the drawings

Fig. 1 is the structural representation of foundry loam fish tail bit described in the utility model;

Fig. 2 is the A-A sectional view of Fig. 1;

Fig. 3 is the front view of imitative fish tail fin described in the utility model;

Fig. 4 is the lateral plan of imitative fish tail fin described in the utility model;

In figure, the corresponding relation of component names and Reference numeral is:

Bit body 1, fittings body 2, imitative fish tail fin 3, upper panel 4, middle fin 5, blade base 6,

Carbide alloy 7, large anistree alloy 8, grout outlet 9, angle steel 10,11 reinforcing ribs.

Detailed description of the invention

Refer to shown in Fig. 1 and Fig. 2, the utility model provides a kind of foundry loam fish tail bit, by bit body 1, fittings body 2, imitative fish tail fin 3, upper panel 4 and middle fin 5 form, described bit body is metal hollow pipe, totally 3 of described upper panels, be uniformly distributed in bit body top, totally 2 of described middle fins, be uniformly distributed in bit body middle part, upper panel and middle fin are all downwards and tilt to side, become 52o angle with bit body vertical line, become 15o angle with bit body center line, upper panel length is 1.5-1.8 times of wing centre section sheet length, wing centre section sheet length is 1.3-1.6 times of imitative fish tail fin width, fish tail fin width is 1.6-2 times of bit body diameter, one side of described upper panel is provided with reinforcing rib 11.Described upper panel 4 and middle fin 5 are all made up of at carbide alloy 7 and the large anistree alloy 8 of blade base side blade base 6 and welding-on, carbide alloy is distributed in the outer cutting face of blade base, and large anistree alloy is distributed in the He Xia cutting face, outer cutting face of blade base.

Refer to shown in Fig. 3 and Fig. 4, described imitative fish tail fin 3 adopts antifriction alloy steel plate to make, afterbody forms Y-shaped to both sides bifurcated, in the middle of afterbody bifurcation, concave, form circular arc cutting face, fish tail fin top is provided with two grout outlets 9 of opposite direction, and grout outlet becomes 45o angle with bit body vertical line, grout outlet center is welded with angle steel 10, and circular arc cutting face and fish tail fin outside are provided with carbide alloy 7.

Design based on said structure, in the time using the utility model, fittings body 2 is connected with the drilling rod of drilling equipment, imitative fish tail fin 3 creeps into clay-bonded sand stratum, there is the ability of the broken native stone of higher cutting in the circular arc cutting face of imitative fish tail fin 3, two continuous 45o pulps of grout outlet 9, effectively wash away landwaste, prevent the wearing and tearing of landwaste to drilling tool, further, it is broken that middle fin 5 and upper panel 4 continue that boring is carried out to ladder cutting, once creeps into and can obtain larger well bore diameter, avoids secondary reaming hole.The best manipulating object of the foundry loam fish tail bit that the utility model provides is silty clay stratum, sandy silt stratum and the powder fine sand stratum of high-ductility, soft.

The above; it is only most preferred embodiment of the present utility model; not the utility model is done to any pro forma restriction; any those of ordinary skill in the art; do not departing from technical solutions of the utility model scope situation; utilize the method content of above-mentioned announcement to make many possible variations and modification to technical solutions of the utility model, all belong to the scope of claims protection.

Claims

1. a foundry loam fish tail bit, by bit body, the fittings body that bit body is connected with drilling rod, be positioned at the imitative fish tail fin on bit body top, be arranged in upper panel and the fin composition at bit body middle part, described bit body metal hollow pipe, totally 3 of described upper panels, be uniformly distributed in bit body top, totally 2 of described middle fins, be uniformly distributed in bit body middle part, upper panel and middle fin are all downwards and tilt to side, become 52o angle with bit body vertical line, become 15o angle with bit body center line, upper panel length is 1.5-1.8 times of wing centre section sheet length, wing centre section sheet length is 1.3-1.6 times of imitative fish tail fin width, fish tail fin width is 1.6-2 times of bit body diameter, one side of described upper panel is provided with reinforcing rib.

2. foundry loam fish tail bit according to claim 1, it is characterized in that: described imitative fish tail fin adopts antifriction alloy steel plate to make, afterbody forms Y-shaped to both sides bifurcated, in the middle of afterbody bifurcation, concave, form circular arc cutting face, fish tail fin top is provided with two grout outlets of opposite direction, and grout outlet becomes 45o angle with bit body vertical line, grout outlet center is welded with angle steel, and circular arc cutting face and fish tail fin outside are provided with carbide alloy.

3. foundry loam fish tail bit according to claim 1, it is characterized in that: described upper panel and middle fin are all carbide alloy and the large anistree alloy compositions in blade base side by blade base and welding-on, carbide alloy is distributed in the outer cutting face of blade base, and large anistree alloy is distributed in the He Xia cutting face, outer cutting face of blade base.