CN208396657U - A kind of point circle cutting tooth Mixed drilling bit - Google Patents

Abstract

The utility model discloses a kind of point circle cutting tooth Mixed drilling bit, including drill body, multiple wings are set on drill body；Wing includes interior tapering, outer shoulder and cuts diameter portion, and the one end in interior tapering extends to the top end face of drill body；The top end face in interior tapering and the top end face of drill body are arranged in angle；The other end in interior tapering is connected with outer shoulder；One end of outer shoulder is connected in interior tapering and is distributed in the shoulder of drill body；The other end of outer shoulder extends to the side of drill body and is connected with diameter portion is cut；Cut short transverse extension of the side along drill body that path portion is distributed in drill body；Multiple sharp cutting tooths and multiple round cutting tooths are distributed on interior tapering and outer shoulder；Interior tapering is staggeredly spaced apart with the sharp cutting tooth on outer shoulder with circle cutting tooth；It cuts path portion and is furnished with round cutting tooth.Mixed interval is distributed sharp cutting tooth and circle cutting tooth on each wing of the utility model, increases the aggressiveness and stability of drill bit.

Description

A kind of point circle cutting tooth Mixed drilling bit

Technical field

The utility model relates to bit technique field more particularly to a kind of point circle cutting tooth Mixed drilling bits.

Background technique

Currently, generalling use drill bit in oil drilling to carry out, with going deep into for drill bit, rock stratum is more and more harder, to brill The requirement of cutting tooth on head is also higher and higher.But the cutting tooth that wing is distributed on existing drill bit mainly still selects list One circle cutting tooth or single sharp cutting tooth, and single its aggressiveness of circle cutting tooth is poor, causes broken rock speed low；And Then stability is poor for single sharp cutting tooth, and drill bit is prone to wear.

Utility model content

For overcome the deficiencies in the prior art, the purpose of this utility model is to provide a kind of point circle cutting tooth mixing to bore Head, mixed interval is distributed sharp cutting tooth and circle cutting tooth on each wing, increases the aggressiveness and stability of drill bit.

The purpose of this utility model is implemented with the following technical solutions:

A kind of point circle cutting tooth Mixed drilling bit, including drill body set multiple wings on drill body, and multiple wings are around brill The central axis circumferentially-spaced of head ontology；Wing includes interior tapering, outer shoulder and cuts diameter portion, and the one end in interior tapering extends To the top end face of drill body；The top end face in interior tapering and the top end face of drill body are arranged in angle；The other end in interior tapering With being connected for outer shoulder；One end of outer shoulder is connected in interior tapering and is distributed in the shoulder of drill body；The other end of outer shoulder It extends to the side of drill body and is connected with diameter portion is cut；Cut height of the side along drill body that path portion is distributed in drill body Direction extends；It is distributed on the interior tapering and outer shoulder along its respective multiple sharp cutting tooth of length direction arrangement and more A round cutting tooth；Interior tapering is staggeredly spaced apart with length direction of the sharp cutting tooth with circle cutting tooth along wing on outer shoulder； The path portion of cutting is furnished with round cutting tooth.

Preferably, there are six the wing is set.

Preferably, six wings are followed successively by the first wing, the second wing, around the central axis circumferencial direction of drill body Three wings, the 4th wing, the 5th wing and the 6th wing；The back rake angle of multiple round cutting tooths on first wing is by interior tapering 18 °, 16 °, 18 °, 20 °, 22 ° are followed successively by diameter portion is cut；The back rake angle of multiple round cutting tooths on second wing by interior tapering extremely It cuts diameter portion and is followed successively by 17 °, 20 °, 22 °；The back rake angle of multiple round cutting tooths on third wing is by interior tapering to cutting diameter portion successively It is 18 °, 17 °, 20 °, 22 °；The back rake angle of multiple round cutting tooths on 4th wing by interior tapering to cut diameter portion be followed successively by 16 °, 18°,20°,22°；The back rake angle of multiple round cutting tooths on 5th wing by interior tapering to cut diameter portion be followed successively by 19 °, 17 °, 17°,18°,20°,22°；The back rake angle of multiple round cutting tooths on 6th wing by interior tapering to cut diameter portion be followed successively by 16 °, 18°、20°。

Preferably, the sharp cutting tooth on each wing and circle cutting tooth are around the central axis circumference inverse time of the drill body Needle helically arrange by formula.

Preferably, distribution angle of six wings on the circumferencial direction of drill body be respectively 0 °, 60 °, 125 °, 180°、235°、295°。

Preferably, in the two neighboring sharp cutting tooth on the outer shoulder, wherein the height of the sharp cutting tooth far from interior tapering It spends 1.5mm bigger than the height of the sharp cutting tooth close to interior tapering.

Preferably, the top rake of sharp cutting tooth is 5 ° -10 °.

Preferably, drill body is equipped with nozzle, is distributed with the nozzle between two adjacent wings.

Compared with prior art, the utility model has the beneficial effects that: its mixed interval distribution point on each wing is cut Tooth and circle cutting tooth are cut, sharp cutting tooth can increase the aggressiveness of drill bit, and the stability of drill bit can be improved in circle cutting tooth, in this way, Sharp cutting tooth and circle cutting tooth that wing length direction is staggeredly spaced apart can increase the aggressiveness and stability of drill bit simultaneously.

Detailed description of the invention

Fig. 1 is the planar structure schematic diagram of the drill bit of the utility model；

Fig. 2 is the top view of the drill bit of the utility model；

Fig. 3 is the schematic perspective view of the drill bit of the utility model.

In figure: 10, drill body；20, wing；21, interior tapering；22, outer shoulder；23, diameter portion is cut；24, circle cutting tooth； 25, sharp cutting tooth；30, nozzle.

Specific embodiment

In the following, being described further in conjunction with attached drawing and specific embodiment to the utility model:

A kind of point circle cutting tooth Mixed drilling bit as shown in Figure 1, Figure 2 and shown in Fig. 3, including drill body 10, in drill bit sheet Multiple wings 20 are set on body 10, and multiple wings 20 are around the central axis circumferentially-spaced of drill body 10.Particularly, knife The wing 20 includes interior tapering 21, outer shoulder 22 and cuts diameter portion 23, and the one end in interior tapering 21 extends to the top end face of drill body 10； The top end face in interior tapering 21 and the top end face of drill body 10 are arranged in angle；The rank of the other end in interior tapering 21 and outer shoulder 22 It connects；One end of outer shoulder 22 is connected in interior tapering 21 and is distributed in the shoulder of drill body 10；The other end of outer shoulder 22 extends To drill body 10 side and be connected with diameter portion 23 is cut；It cuts diameter portion 23 and is distributed in the side of drill body 10 along drill body 10 Short transverse extend.

In addition, being distributed on interior tapering 21 and outer shoulder 22 along its multiple point cutting that respectively length direction is arranged Tooth 25 and multiple round cutting tooths 24；Interior tapering 21 is with the sharp cutting tooth 25 on outer shoulder 22 with circle cutting tooth 24 along the length of wing 20 Degree direction is staggeredly spaced apart；It cuts diameter portion 23 and round cutting tooth 24 is distributed with.

When on the basis of the said structure, using the point circle cutting tooth Mixed drilling bit of the utility model, in each wing 20 Upper mixed interval is distributed sharp cutting tooth 25 and circle cutting tooth 24, and sharp cutting tooth 25 can increase the aggressiveness of drill bit, circle cutting tooth 24 The stability of drill bit can be improved, in this way, the sharp cutting tooth 25 and circle cutting tooth 24 that are staggeredly spaced apart in 20 length direction of wing The aggressiveness and stability of drill bit can be increased simultaneously.

Illustrate when needing, the sharp cutting tooth 25 in the present embodiment refers to the cutting face of cutting tooth in pointed, in broken rock When sharp structure be easier to enter, and justify cutting tooth 24 and then refer to that the cutting face of cutting tooth is rounded, overall structure is relatively stable.

Preferably, there are six wing 20 is set, the distributed quantity of the wing 20 makes drill bit when in use, and whole stress is more flat Surely.

More particularly, six above-mentioned wings 20 are followed successively by the first knife around the central axis circumferencial direction of drill body 10 The wing 20, the second wing 20, third wing 20, the 4th wing 20, the 5th wing 20 and the 6th wing 20, on the first wing 20 The back rake angle of multiple round cutting tooths 24 is followed successively by 18 °, 16 °, 18 °, 20 °, 22 ° to diameter portion 23 is cut by interior tapering 21；Second wing The back rake angle of multiple round cutting tooths 24 on 20 is followed successively by 17 °, 20 °, 22 ° to diameter portion 23 is cut by interior tapering 21；Third wing 20 On the back rake angles of multiple round cutting tooths 24 be followed successively by 18 °, 17 °, 20 °, 22 ° to diameter portion 23 is cut by interior tapering 21；4th wing The back rake angle of multiple round cutting tooths 24 on 20 is followed successively by 16 °, 18 °, 20 °, 22 ° to diameter portion 23 is cut by interior tapering 21；5th knife The back rake angle of multiple round cutting tooths 24 on the wing 20 by interior tapering 21 to cut diameter portion 23 be followed successively by 19 °, 17 °, 17 °, 18 °, 20 °, 22°；The back rake angle of multiple round cutting tooths 24 on 6th wing 20 by interior tapering 21 to cut diameter portion 23 be followed successively by 16 °, 18 °, 20°.In this way, the back rake angle being distributed on interior tapering 21 is relatively small i.e. on each wing 20,20 ° are usually no more than, it can be with The aggressiveness for increasing drill bit, obtains higher rate of penetration；And 24 back rake angle of circle cutting tooth on outer shoulder 22 is relatively large, it can To protect the circle cutting tooth 24 on external taper to be not easy to be worn.

In addition, it should be noted that, the arrangement for cutting circle cutting tooth 24 in diameter portion 23 in the present embodiment increases the steady of drill bit It is qualitative, cutting tooth can be effectively protected.

Preferably, the sharp cutting tooth 25 on each wing 20 and circle cutting tooth 24 are around the central axis circumference of drill body 10 Helically formula is arranged counterclockwise, in this way, the cutting tooth of each wing 20 can interlock on drill body 10 in drill bit rock break-off process It is contacted with rock stratum, reduces the time of contact of single cutting tooth and rock stratum, effective protection cutting tooth is not worn.

Preferably, distribution angle of six wings 20 on the circumferencial direction of drill body 10 be respectively 0 °, 60 °, 125 °, 180 °, 235 °, 295 °, the arrangement mode of six wings 20 can make the bearing capacity relative equilibrium of each wing 20, and when drilling well bores Head is more steady efficient.

Preferably, in the two neighboring sharp cutting tooth 25 on outer shoulder 22, wherein the sharp cutting tooth 25 far from interior tapering 21 Height it is 1.5mm bigger than the height of the sharp cutting tooth 25 close to interior tapering 21, can protect cutting tooth, increase bit life.

Preferably, the top rake of sharp cutting tooth 25 is 5 ° -10 °, increases the attack strength of sharp cutting tooth 25.

Preferably, drill body 10 is equipped with nozzle 30, is distributed with nozzle 30 between two adjacent wings 20, the spray The phenomenon that mouth 30 can enhance the effect to bring bottoms up, and bit balling can be effectively prevented can obtain higher machine in mud stone section Tool drilling speed.

It will be apparent to those skilled in the art that can make various other according to the above description of the technical scheme and ideas Corresponding change and deformation, and all these changes and deformation all should belong to the protection of the utility model claims Within the scope of.

Claims (8)

1. a kind of point justifies cutting tooth Mixed drilling bit, including drill body, multiple wings are set on drill body, multiple wings are around drill bit The central axis circumferentially-spaced of ontology；It is characterized in that, wing includes interior tapering, outer shoulder and cuts diameter portion, interior tapering One end extend to the top end face of drill body；The top end face in interior tapering and the top end face of drill body are arranged in angle；Inner cone The other end in portion is connected with outer shoulder；One end of outer shoulder is connected in interior tapering and is distributed in the shoulder of drill body；External shoulder The other end in portion extends to the side of drill body and is connected with diameter portion is cut；It cuts path portion and is distributed in the side of drill body along drill bit The short transverse of ontology extends；It is distributed on the interior tapering and outer shoulder along its multiple point that respectively length direction is arranged Cutting tooth and multiple round cutting tooths；Interior tapering interlocks with circle cutting tooth along the length direction of wing with the sharp cutting tooth on outer shoulder It is spaced apart；The path portion of cutting is furnished with round cutting tooth.

2. point circle cutting tooth Mixed drilling bit as described in claim 1, which is characterized in that there are six the wing is set.

3. point circle cutting tooth Mixed drilling bit as claimed in claim 2, which is characterized in that six wings are around the center of drill body Circumference direction is followed successively by the first wing, the second wing, third wing, the 4th wing, the 5th wing and the 6th wing；The The back rake angle of multiple round cutting tooths on one wing is followed successively by 18 °, 16 °, 18 °, 20 °, 22 ° to diameter portion is cut by interior tapering；Second The back rake angle of multiple round cutting tooths on wing is followed successively by 17 °, 20 °, 22 ° to diameter portion is cut by interior tapering；It is more on third wing The back rake angle of a round cutting tooth is followed successively by 18 °, 17 °, 20 °, 22 ° to diameter portion is cut by interior tapering；Multiple circles on 4th wing are cut The back rake angle for cutting tooth is followed successively by 16 °, 18 °, 20 °, 22 ° to diameter portion is cut by interior tapering；Multiple round cutting tooths on 5th wing Back rake angle is followed successively by 19 °, 17 °, 17 °, 18 °, 20 °, 22 ° to diameter portion is cut by interior tapering；Multiple round cutting tooths on 6th wing Back rake angle be followed successively by 16 °, 18 °, 20 ° to diameter portion is cut by interior tapering.

4. point circle cutting tooth Mixed drilling bit as claimed in claim 2, which is characterized in that sharp cutting tooth and circle on each wing Cutting tooth around the central axis circumference of the drill body, helically arrange counterclockwise by formula.

5. point circle cutting tooth Mixed drilling bit as claimed in claim 2, which is characterized in that circumference of six wings in drill body Distribution angle on direction is respectively 0 °, 60 °, 125 °, 180 °, 235 °, 295 °.

6. point circle cutting tooth Mixed drilling bit as described in claim 1, which is characterized in that the two neighboring point on the outer shoulder In cutting tooth, wherein the height of the sharp cutting tooth far from interior tapering is 1.5mm bigger than the height of the sharp cutting tooth close to interior tapering.

7. point circle cutting tooth Mixed drilling bit as described in claim 1, which is characterized in that the top rake of sharp cutting tooth is 5 °- 10°。

8. point circle cutting tooth Mixed drilling bit as described in claim 1, which is characterized in that drill body is equipped with nozzle, adjacent Two wings between be distributed with the nozzle.