CN200955355Y

CN200955355Y - Gear-wheel drill-bit with pile-up welding notocentrum teeth

Info

Publication number: CN200955355Y
Application number: CN 200620133926
Authority: CN
Inventors: 徐彤; 李建伟; 郑家伟; 王建中
Original assignee: China National Petroleum Corp; Sichuan Petroleum Administration Bureau
Current assignee: China National Petroleum Corp; Sichuan Petroleum Administration Bureau
Priority date: 2006-09-28
Filing date: 2006-09-28
Publication date: 2007-10-03
Anticipated expiration: 2016-09-28

Abstract

The utility model relates to a roller bit with a build-up welding gauge compact. The roller bit is used for petroleum natural gas, geological exploration and mine drilling-well and relates to the manufacturing technical field of the drilling-well target roller bit. The utility model solves the problem of: the large hole-drilling depth of the gauge compact upper inlaid gear deduces the intensity and shortens the service life of the roller bit main body. The utility model also solves the problem of that the strength of both the well sharpening on the flat cap gear inlaid of the gauge compact and the well wall finishing. The utility model comprises a roller bit and a tooth. A shallower base hole is drilled on the tooth gauge compact. The base hole adopts a single line of build-up welding gauge compact or a plurality of lines of build-up welding gauge compacts that is or are made of tungsten carbide, diamond these wearable materials. The build-up welding gauge compacts can be separately arranged from the hard material alloy gear, and also can be arranged in series. Resulting from that the base hole is very shallow and any damage can be caused to the roller bit basal body, thereby, the utility model can ensure the combination of the build-up welding gear and the roller bit basal body. The build-up welding gauge compact can effectively maintain the steady diameter of the well-bore.

Description

Rock bit with built-up welding gauge compact

Technical field: a kind of rock bit with built-up welding gauge compact, be used for a kind of natural petroleum gas field and geological prospecting, mining drilling well, relate to the manufacturing technology field of a kind of oil drilling with rock bit.

Background technology: existing steel-tooth and inserted two big class rock bit, insert hard-metal insert all on the back cone gear ring of its gear wheel, for when creeping into, preventing dwindling of hole diameter, can carry out the borehole wall when gauge compact of gear wheel and outer rows of teeth assist the main cutting tooth to carry out secondary cutting repaiies and scrapes, the shortcoming of prior art is: inserted need boring at the back cone of gear wheel on back cone, and the degree of depth of boring is darker relatively, like this with regard to the corresponding cone body intensity that weakened, influence bit life, in addition, generally all edge tack tooth on back cone, the dynamics deficiency of the tack tooth cutting shaft bottom and the finishing borehole wall, and inserted mismatch error is bigger, also easily falls tooth.

Summary of the invention: the purpose of this utility model is the shortcoming at prior art, basic hole is bored in employing on the gear wheel back cone, and on basic hole the single or technology of arranging the built-up welding gauge compact more, design a kind of axis the rock bit with built-up welding gauge compact vertical of gauge compact with the gear wheel back cone.

The utility model is made up of gear wheel and tooth, the relevant position is drilled with basic hole on the gear wheel back cone, hole depth 2～5mm, the diameter in hole, basis is a gear wheel back cone width 1/4～1/2, on basic hole, adopt high-abrasive material built-up welding gauge compacts such as tungsten carbide, diamond, gauge compact is single layout on the gear wheel back cone, gauge compact also can be to arrange to put on the gear wheel back cone more, even or non-homogeneous layout, the gauge compact of built-up welding can be arranged with the carbide alloy space of teeth, also can be continuous layout, the shape of built-up welding tooth can be tack, sphere, taper or wedge shape; The axis of gauge compact is vertical with the gear wheel back cone, and the proud exposure that welds later gauge compact is 0.5～5mm; When drill bit crept into, the gauge compact that is welded on the gear wheel back cone assisted drill bit main cutting tooth to carry out secondary cutting, repaiies simultaneously and scrapes the borehole wall, and hole diameter is remained unchanged.

Advantage of the present utility model and good effect are: have more shallow basic hole depth, reduced damage to the gear wheel matrix, kept intensity, the processing of employing welding method, can guarantee combining of built-up welding tooth and gear wheel matrix, the gauge compact of built-up welding can guarantee effectively that borehole diameter is constant, and can reduce the consumption of material, built-up welding has the rock bit of gauge compact can increase substantially application life of drill bit, and technology is simple.

Description of drawings:

Fig. 1 is the utility model gear wheel side schematic view, and Fig. 2 is the utility model gear wheel sectional drawing.

The specific embodiment:

Provide embodiment of the present utility model below in conjunction with accompanying drawing: the utility model is by gear wheel 1, back cone 2, gauge compact 3 and main cutting steel-tooth 4 are formed, on gear wheel back cone 2, be drilled with basic hole, the hole, basis is evenly arranged by equidistant on gear wheel back cone 2, the diameter in hole, basis is 1/4～1/2 of a gear wheel back cone 2, basis hole depth 2～5mm, gauge compact 3 by high-abrasive material built-up welding such as tungsten carbide or diamonds in the basic hole of back cone 2, drilling depth is more shallow like this, reduced damage, do not weakened the body intensity of bit cone the gear wheel matrix; On basic hole, the axis normal of gauge compact 3 is in gear wheel back cone 2, and the proud exposure of gauge compact 3 is 0.5～5mm, and the shape of built-up welding tooth can be tack, sphere, taper, wedge shape;

When the utility model crept at drill bit, when the main cutting steel-tooth of rock bit 4 crept into downwards, gauge compact 3 played the constant effect of borehole diameter when keeping drill bit to creep into, and repaiies when assisting drill bit to carry out secondary cutting and scrapes the borehole wall.

Claims

1, a kind of rock bit with built-up welding gauge compact is made up of gear wheel and tooth, it is characterized in that:

The back cone of a, described gear wheel is provided with basic hole, and the diameter in basic hole is 1/4～1/2 of a gear wheel back cone width, and the degree of depth is 2～5mm;

Built-up welding has gauge compact in b, the described basic hole, and the proud exposure of gauge compact is 0.5～5mm, and the axis of gauge compact is vertical with the gear wheel back cone;

More the single layout of the gauge compact of c, described built-up welding also can arrange and put, and the gauge compact of built-up welding is equidistant evenly to be arranged, also can not equidistant non-homogeneous layout, and the gauge compact of built-up welding can be arranged with the carbide alloy space of teeth, also can arrange continuously.

2, the rock bit with built-up welding gauge compact according to claim 1 is characterized in that: the shape of described gauge compact can be tack, sphere, taper, wedge shape etc.

3, the rock bit with built-up welding gauge compact according to claim 1 is characterized in that: the material of built-up welding gauge compact is tungsten carbide, diamond.