CN201810216U

CN201810216U - Low-friction-resistance drilling bit

Info

Publication number: CN201810216U
Application number: CN2010205646347U
Authority: CN
Inventors: 彭静涛
Original assignee: SICHUAN CHUANSHI DIAMOND BIT CO Ltd
Current assignee: SICHUAN CHUANSHI DIAMOND BIT CO Ltd
Priority date: 2010-10-15
Filing date: 2010-10-15
Publication date: 2011-04-27
Anticipated expiration: 2020-10-15

Abstract

The utility model relates to a low-friction-resistance drilling bit, which belongs to a drilling tool used in the technical field of petroleum and geological exploration drilling. The low-friction-resistance drilling bit comprises a drilling bit body and a joint, wherein the drilling bit body is arranged on the joint and consists of a plurality of cutter wings, cuttings chutes are naturally formed between the cutter wings, polycrystalline diamond compacts (PDC) are welded on the edge of the upper section of each cutter wing for forming a cutting structure, and the lower section of the cutter wing has the gauge diameter. The utility model has the main technical scheme that the standard diameter is a smooth circular arc surface, polycrystalline blocks are arranged on the gauge diameter surface, and the height d from the surface of the polycrystalline blocks to the gauge diameter surface is between 0.5 and 3mm. The low-friction-resistance drilling bit is additionally provided with the polycrystalline blocks or the polycrystalline particles with smaller friction resistance on the gauge diameter, and the polycrystalline blocks or the polycrystalline particles projected out of the surface of the gauge diameter are in contact with the well wall, so the gauge diameter surface is not in contact with the well wall, the contact area of the drilling bit and the well wall is reduced, the friction resistance received by the drilling bit in the directional well drilling is smaller, the reverse torque exerted on the drilling bit by the stratum is also reduced, the design is favorable for stabilizing the directional tool surface of the drilling bit, the control capability of the drilling bit tool surface is effectively improved, and the work efficiency of the drilling bit is further improved.

Description

A kind of low frictional resistance drill bit

Technical field:

Low frictional resistance drill bit belongs to oil, the used drilling tool in geological prospecting drilling technology field.

Background technology:

Studies show that in recent years, the reason that directional well drill bit root tool-face is difficult to control is that the reaction torque that is applied on the drill bit of drill bit stratum in orientation process is excessive, cause drill bit very unstable at the underground work state, the drill bit shaft cardiac wave is moving, and to make that tool-face fluctuates thereupon bigger, the result is that tool-face control difficulty is big, and to be applied to reaction torque reason on the drill bit be because the contact area of the drill bit and the borehole wall is big mostly on the stratum, thereby frictional resistance causes greatly.In case drill bit tool-face in drilling process fluctuation occurs then must readjust tool-face directional bearing is guaranteed.A large amount of times of adjusting tool-face make that the drill bit directive efficiency is low.How effectively reducing the reaction torque that the stratum is applied on the drill bit is effectively to solve one of unsettled method of tool-face.

Summary of the invention:

Problem to be solved in the utility model is exactly to provide a kind of at above deficiency and reduce frictional resistance, and effectively reduce the drill bit that the stratum applies reaction torque.Its technical scheme is as follows:

It comprises drill body and joint, and drill body is installed on the joint, and drill body is made up of a plurality of wings, forms chip area between the wing naturally, and each wing epimere edge welding PDC composite sheet forms cutting structure, and the wing hypomere is the rule footpath.Its key technology is that the rule footpath is smooth arc, on surface, rule footpath the glomerocryst piece is installed, and glomerocryst piece surface is 0.5～3mm to the height d on surface, rule footpath.

The beneficial effect that compared with prior art the utlity model has is:

The utility model installs littler glomerocryst piece of frictional resistance or glomerocryst particle additional on the rule footpath, the glomerocryst piece or the glomerocryst particle on these surfaces, outstanding rule footpath contact with the borehole wall, surface, rule footpath is not contacted with the borehole wall, the area that contacts with the borehole wall of drill bit has reduced like this, the frictional resistance that drill bit is subjected in directional well creeps into can be littler, the reaction torque that the stratum is applied on the drill bit also reduces thereupon, help the stable of drill bit directional orientation tool face, effectively improve the control ability of bit tool face, further improve the drill bit operating efficiency.

Description of drawings:

Fig. 1 is the utility model structural representation;

Fig. 2 is the utility model structural representation;

Fig. 3 is Fig. 2 lateral view.

The specific embodiment:

Embodiment one:

Referring to Fig. 1-Fig. 3, the utility model comprises drill body 1 and joint 2, and drill body 1 is installed on the joint 2, drill body is made up of a plurality of wings, the nature of asking of wing forms chip area 4, and each wing epimere edge welding PDC composite sheet 5 forms cutting structure, and the wing hypomere is rule footpath 3.Its key technology is that rule footpath 3 is smooth arc, on 3 surfaces, rule footpath glomerocryst piece 6 is installed, glomerocryst piece surface is 0.5～3mm to the height d on surface, rule footpath, glomerocryst piece 6 is cuboid, cylinder, ellipsoid or polyhedron, glomerocryst piece size is generally 3mm * 4mm * 10mm, can change according to different situations.

Embodiment two:

Other structure of present embodiment is identical with embodiment one, and different is on 3 surfaces, rule footpath the glomerocryst particle to be installed, and the glomerocryst particle size is generally 3mm * 4mm * 4mm, can change according to different situations.

Claims

1. one kind low frictional resistance drill bit, comprise drill body (1) and joint (2), drill body (1) is installed on the joint (2), drill body is made up of a plurality of wings, forms chip area (4) between the wing naturally, and each wing epimere edge welding PDC composite sheet (5) forms cutting structure, the wing hypomere is rule footpaths (3), it is characterized in that rule footpaths (3) are smooth arc, on surface, rule footpaths (3) glomerocryst piece (6) is installed, glomerocryst piece surface is 0.5～3mm to the height d on surface, rule footpath.

2. according to the described low frictional resistance drill bit of claim 1, it is characterized in that the glomerocryst particle being installed on surface, rule footpaths (3).

3. according to the described low frictional resistance drill bit of claim 1, it is characterized in that glomerocryst piece (6) is cuboid, cylinder, ellipsoid or polyhedron.