CN103742077A

CN103742077A - Composite wear-resisting drill bit

Info

Publication number: CN103742077A
Application number: CN201410045561.3A
Authority: CN
Inventors: 李楠; 王风明
Original assignee: SHANDONG YUANZHENG PETROLEUM EQUIPMENT CO Ltd
Current assignee: SHANDONG YUANZHENG PETROLEUM EQUIPMENT CO Ltd
Priority date: 2014-01-26
Filing date: 2014-01-26
Publication date: 2014-04-23

Abstract

The invention relates to a petroleum and natural gas drilling technology, and discloses a composite wear-resisting drill bit. The composite wear-resisting drill bit comprises a joint, wherein a drill bit substrate is arranged under the joint; six bit legs are uniformly distributed around the drill bit substrate; bit cones are mounted on three bit legs, while the other three bit legs adopt PDC (Polycrystalline Diamond Compact) drill structures; lateral blades are arranged on the broadsides and bottoms of the bit legs; diamond compacts are welded on all the lateral blades; six nozzles are distributed at the bottom of the drill bit substrate; trifurcate bottom blades are opposite to the bit cones; the diamond compacts are welded on the bottom blades. Through technical improvement, the PDC drill bit and the bit cone drill technology are combined to effectively give play to effects of the bit cones to impact, crush and shear strata rocks. Moreover, the lateral blades and the bottom blades on the drill bit substrate can facilitate shearing of rock stratum, and reduce impact of the rock stratum to the bit cones. The drilling torque of the drill bit is stable; the directional drilling is easier to control; the torsion vibration is reduced; the drill bit service life is effectively prolonged.

Description

Combined type wear-resistance bit

Technical field

The present invention relates to a kind of petroleum and natural gas drilling technology, be specifically related to a kind of combined type wear-resistance bit.

Background technology

In oil, natural gas and various probing industry, drill bit is indispensable important exploitation parts, at present most widely used is rock bit and PDC drill bit, the relative PDC drill bit of rock bit, rock bit has the effect of better impact, crushing and shearing-crushing formation rock when rotated, and can guidance quality strong, so, relatively adapt to soft, in, hard various stratum, but because its gear wheel is to be fixed on bit leg by bearing, during long-time use, easily make gear wheel torsional shaking, cause gear wheel to destroy; PDC drill bit is through Continuous improvement in recent years, with its superior cutting power and lasting ability to work, also progressively by people, approved, but a little less than the shear ability of PDC drill bit, if worked in the ground consisting of hard rock of hard interbedded layer and long section for a long time, can cause it to creep into moment of torsion not steady, when directed drilling, the brill of drill bit is to being not easy control; How by technological improvement, by PDC drill bit and rock bit Technology Integration, respectively get its advantage, develop a kind of working environment that is applicable to various hard rock interlayers, creep into moment of torsion steadily and Directional Drilling more easily control, torsional shaking reduces, and the long wear-resistance bit of bit life is current petroleum machinery industry problem demanding prompt solution.

Summary of the invention

For overcoming prior art deficiency, the invention provides a kind of combined type wear-resistance bit, it is reasonable in design, and the working environment of applicable various hard rock interlayers, creeps into moment of torsion steadily and Directional Drilling is more easily controlled, and torsional shaking reduces, and bit life is longer.

For realizing above-mentioned technical purpose, the present invention adopts following scheme: a kind of combined type wear-resistance bit, comprise a joint, joint below is bit matrix, it is characterized in that: around bit matrix, within one week, be uniform-distribution with six bit legs, it between every two bit legs, is the angle of 60 °, in six described bit legs, have on three bit legs gear wheel is installed, on other three bit legs, it is PDC drill configurations, the side of the described bit leg with PDC drill configurations and bottom are the side tool wing, are all welding diamond compact on the side tool wing; The bottom of bit matrix, six nozzles that distributing, the bottom of bit matrix, facing gear wheel is the bed plate wing of trident, on the bed plate wing, is welding diamond compact.

Six nozzles of described bit matrix bottom, three is perpendicular nozzle, three is side direction nozzle, described perpendicular nozzle and side direction nozzle cross-distribution, perpendicular nozzle be distributed in bit matrix under, side direction nozzle is arranged on side tool wing rear, and described perpendicular nozzle and side direction nozzle are carbide alloy material.

Described three gear wheels and three side tool wing cross-distribution, between adjacent two gear wheels by interplane separating of side tool.

The setting angle A of described gear wheel on bit leg is within the scope of 110 °～115 °.

Beneficial effect of the present invention is: the present invention is by technological improvement, by PDC drill bit and rock bit Technology Integration, respectively get its advantage, by the equipment rotating, drive gear wheel to rotate, the effectively effect of impact, crushing and the shearing formation rock of performance gear wheel, guarantee the present invention have good can guidance quality, when shearing formation rock, the auxiliary rock stratum of shearing of the side tool wing on bit matrix and the bed plate wing, reduced the impact of rock stratum to gear wheel, make of the present inventionly to creep into moment of torsion steadily and Directional Drilling is more easily controlled, reduced torsional shaking; Described three perpendicular nozzle and three side direction nozzles form fan-shaped cleaning surface; mud stone, shale and kern stone are had to direct hydraulic drilling effect; limestone, fine sandstone are had to the effect of good waterpower auxiliary rock; can also effectively remove shaft bottom cuttings bed and bit balling; effectively the protection side tool wing and the bed plate wing and gear wheel are avoided landwaste impact, have effectively improved bit life.

Accompanying drawing explanation

Fig. 1 is structural representation of the present invention.

Fig. 2 is substructure schematic diagram of the present invention.

Fig. 3 is semi-section schematic diagram of the present invention.

In figure, 1, joint, 2, bit matrix, 3, bit leg, 4, gear wheel, 5, the side tool wing, 6, nozzle, 7, the bed plate wing, 8, diamond compact, 61, side direction nozzle, 62, perpendicular nozzle.

The specific embodiment

Shown in accompanying drawing, a kind of combined type wear-resistance bit, comprise a joint 1, joint 1 below is bit matrix 2, around bit matrix, within 2 one weeks, be uniform-distribution with six bit legs 3, it between every two bit legs 3, is the angle of 60 °, six described bit legs 3, have on three bit legs 3 gear wheel 4 is installed, the setting angle A of gear wheel 4 on bit leg 3 is within the scope of 110 °～115 °, on other three bit legs 3, it is PDC drill configurations, the side of the described bit leg with PDC drill configurations 3 and bottom are the side tool wing 5, on the side tool wing 5, all welding diamond compact 8, described three gear wheels 4 and three the side tool wing 5 cross-distribution, spaced apart by a side tool wing 5 between adjacent two gear wheels 4, the bottom of bit matrix 2, six nozzles 6 are distributing, wherein three is perpendicular nozzle 62, three is side direction nozzle 61, described perpendicular nozzle 62 and side direction nozzle 61 cross-distribution, perpendicular nozzle 62 be distributed in bit matrix 2 under, side direction nozzle 61 is arranged on the side tool wing 5 rears, described perpendicular nozzle 62 and side direction nozzle 61 are carbide alloy material, the bottom of bit matrix 2, faces gear wheel 4 for the bed plate wing 7 of trident, is welding diamond compact 8 on the bed plate wing 7.

When the present invention uses, joint 1 and outer drive shafts are fixed, externally under the drive of power transmission shaft, bit matrix 2 starts to rotate and to rock stratum feeding, gear wheel 4 on three bit legs 3 is followed bit matrix 2 and is started to rotate, impact, crush and shearing formation rock, the side tool wing 5 and the bed plate wing 7 are followed bit matrix 2 rotations simultaneously, diamond compact 8 and gear wheel 4 on the side tool wing 5 are combined with, jointly complete creeping into of well periphery, and the center of well is to complete brokenly rock by the diamond compact 8 being positioned on the bed plate wing 7, at gear wheel 4 and the side tool wing 5 and the bed plate wing 7, jointly complete shearing, in the time of impinging earth strata, perpendicular nozzle 62 and side direction nozzle 61 are to rock stratum jet water course, form larger fan-shaped cleaning surface, nozzle 6 jets are to mud stone, shale and kern stone have direct hydraulic drilling effect, to limestone, fine sandstone has the effect of good waterpower auxiliary rock, can also effectively remove shaft bottom cuttings bed and bit balling, significantly improve the feeding of bit matrix 2, effectively the protection side tool wing 5 and the bed plate wing 7 and gear wheel 4 are avoided landwaste impact simultaneously, make of the present inventionly to creep into moment of torsion steadily and Directional Drilling is more easily controlled, reduced torsional shaking, effectively improved bit life.

Claims

1. a combined type wear-resistance bit, comprise a joint, joint below is bit matrix, it is characterized in that: around bit matrix, within one week, being uniform-distribution with six bit legs, is the angle of 60 ° between every two bit legs, in six described bit legs, have on three bit legs gear wheel is installed, on other three bit legs, be PDC drill configurations, the side of the described bit leg with PDC drill configurations and bottom are the side tool wing, are all welding diamond compact on the side tool wing; The bottom of bit matrix, six nozzles that distributing, the bottom of bit matrix, facing gear wheel is the bed plate wing of trident, on the bed plate wing, is welding diamond compact.

2. a kind of combined type wear-resistance bit as claimed in claim 1, it is characterized in that: six nozzles of described bit matrix bottom, three is perpendicular nozzle, three is side direction nozzle, described perpendicular nozzle and side direction nozzle cross-distribution, perpendicular nozzle be distributed in bit matrix under, side direction nozzle is arranged on side tool wing rear, described perpendicular nozzle and side direction nozzle are carbide alloy material.

3. a kind of combined type wear-resistance bit as claimed in claim 1, is characterized in that: described three gear wheels and three side tool wing cross-distribution, between adjacent two gear wheels by interplane separating of side tool.

4. a kind of combined type wear-resistance bit as claimed in claim 1, is characterized in that: the setting angle A of described gear wheel on bit leg is within the scope of 110 °～115 °.