CN113216857A

CN113216857A - PDC drill bit with auxiliary balance wings

Info

Publication number: CN113216857A
Application number: CN202110584480.0A
Authority: CN
Inventors: 任志坤; 王亮
Original assignee: Hebei Ruishi Aiguille Manufacture Co ltd
Current assignee: Hebei Ruishi Aiguille Manufacture Co ltd
Priority date: 2021-05-27
Filing date: 2021-05-27
Publication date: 2021-08-06

Abstract

The invention relates to the technical field of petroleum, in particular to a PDC drill bit with auxiliary balance wings, which comprises a PDC drill bit body, wherein the top end of the PDC drill bit body is provided with three uniformly distributed working blades, a groove is formed between every two adjacent working blades on the top end of the PDC drill bit body, a fixed block is arranged inside each groove, the top ends of the three fixed blocks are respectively provided with the auxiliary balance wings, the three auxiliary balance wings and the fixed blocks are respectively fixed with the PDC drill bit body through bolts, the shapes of the three auxiliary balance wings are respectively matched with the shapes of the fixed blocks, the left end and the right end of each auxiliary balance wing are respectively provided with a plurality of radiating grooves, so that the auxiliary balance wings can be conveniently installed and detached, and the auxiliary balance wings can play a better stabilizing effect, so that the heat sink dissipates heat by reducing the area of the auxiliary balance wing.

Description

PDC drill bit with auxiliary balance wings

Technical Field

The invention relates to the technical field of petroleum, in particular to a PDC drill bit with auxiliary balance wings.

Background

As is known, PDC bits for earth drilling use primarily break up rock by shearing, generally in the following modes: firstly, cutting teeth are eaten into a stratum under the action of bit pressure, then the cutting teeth rotate under the action of power torque to form volume crushing on stratum rocks in a shearing mode, and the power torque applied to a drill bit is transmitted to the drill bit through a drill string by power equipment at a wellhead.

The production cost of PDC drill bit depends on the quantity of drill bit wing, and the cost that the quantity is many is higher, and consequently the less more common of drill bit wing in the market, the less drill bit of drill bit wing also reduces along with it to the support of the wall of a well, and the drill bit can receive great impact and produce serious vibration when the high-speed rotation in shaft bottom, and the cutting teeth can receive earlier impact destruction, and the vibration of drill bit also can produce harmful effects to well bore quality moreover. In addition, the bit reaction torque is increased and the orientation is realized after the number of the blades is reduced

During operation, the tool surface of the drill bit is unstable, the sliding drilling efficiency is seriously influenced, so that auxiliary balance wings need to be added in the drill bit, and the conventional auxiliary balance wings have the following defects. 1: supplementary balanced wing and PDC drill bit structure as an organic whole itself, but supplementary balanced wing's wear rate is higher to cause supplementary balanced wing later stage to play the effect, and whole replacement cost is higher. 2: the supporting area of the auxiliary balance wing is small at present, so that the PDC drill bit still slightly shakes during drilling. 3: the prior auxiliary balance wing has no heat dissipation effect.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the PDC drill bit with the auxiliary balance wings is convenient to replace, has a good heat dissipation effect and a good supporting effect.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: a PDC drill bit with auxiliary balance wings comprises a PDC drill bit body, wherein three working blades which are uniformly distributed are arranged at the top end of the PDC drill bit body, grooves are formed between every two adjacent working blades at the top end of the PDC drill bit body, the three grooves are obliquely arranged, threaded holes are formed in the bottom ends of the three grooves, fixed blocks are arranged in the three grooves, auxiliary balance wings are arranged at the top ends of the three fixed blocks, the three auxiliary balance wings are matched with the fixed blocks in shape, through holes are formed in the top ends of the three auxiliary balance wings and the three fixed blocks, the through holes formed in the top ends of the auxiliary balance wings are countersunk holes, the through holes formed in the top ends of the three fixed blocks are respectively matched with the through holes formed in the top ends of the corresponding fixed blocks, and the through holes in the top ends of the three fixed blocks are matched with the threaded holes formed in the corresponding grooves, three supplementary balanced wing and fixed block all fix with PDC drill bit body through the bolt, and both ends all are provided with several radiating grooves about three supplementary balanced wing.

Further, the top and the bottom of three work wing all are provided with and discharge the groove to discharge the groove and be semicircle ring-shaped, every inboard edges and corners that discharges the groove all sets up to the fillet.

Further, the top and the bottom of the inside bottom of three recess are provided with the guide bar respectively, and the bottom of three fixed block all is provided with two guiding holes to the inside guide bar that is provided with of recess cooperates with the guiding hole that the fixed block bottom was provided with.

Furthermore, each side face of each of the three fixing blocks is a slope face, the slope faces are in a gradually-reduced state from the top end of each fixing block to the bottom end of each fixing block, and the inner sides of the grooves are matched with the outer sides of the fixing blocks.

Further, the threads arranged between the three auxiliary balance wings and the fixing block are all hexagon socket head bolts.

Furthermore, the top ends and the bottom ends of the three auxiliary balance wings are both provided with arc surfaces.

Furthermore, the top edges of the three auxiliary balance wings are all set to be fillets.

Furthermore, the connection relation between the three fixing blocks and the auxiliary balance wing is welding.

(III) advantageous effects

Compared with the prior art, the PDC drill bit with the auxiliary balance wings provided by the invention has the following beneficial effects:

the PDC drill bit with the auxiliary balance wings is characterized in that the three auxiliary balance wings and the fixed blocks are fixed with the PDC drill bit body through bolts, so that the auxiliary balance wings and the fixed blocks can be fixed with the PDC drill bit body through the connection between the bolts and the threaded holes, the auxiliary balance wings can be further conveniently mounted and dismounted, the three grooves are obliquely arranged, the fixed blocks are arranged inside the three grooves, the shapes of the three auxiliary balance wings are matched with the shapes of the fixed blocks, so that the shapes of the auxiliary balance wings are matched with the shapes of the grooves, the auxiliary balance wings are obliquely arranged, the contact area of the auxiliary balance wings is further increased, the auxiliary balance wings can play a better stabilizing effect, and the radiating grooves are formed in the left end and the right end of each of the three auxiliary balance wings, so that the radiating grooves radiate heat through reducing the area of the auxiliary balance wings, the production cost of the auxiliary balance wing is not increased.

Drawings

FIG. 1 is an isometric view of the present invention;

FIG. 2 is an isometric view of the PDC bit body shown in FIG. 1 of the present invention;

FIG. 3 is an isometric view of the supplemental trim tab and retention block of FIG. 1 in accordance with the present invention;

FIG. 4 is a schematic top view of the supplemental trim tab and retention block of FIG. 1 in accordance with the present invention;

fig. 5 is a bottom view schematically illustrating the auxiliary balance wing and the fixing block of fig. 1 according to the present invention.

In the figure: 1. a PDC bit body; 2. a working blade; 3. a fixed block; 4. auxiliary balance wings; 5. a heat sink; 6. a guide rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, the PDC drill bit with auxiliary balance wings of the present invention comprises a PDC drill bit body 1, wherein three working blades 2 are uniformly arranged at the top end of the PDC drill bit body 1, a groove is formed between every two adjacent working blades 2 at the top end of the PDC drill bit body 1, the three grooves are all arranged in an inclined manner, threaded holes are formed at the bottom ends of the three grooves, fixing blocks 3 are arranged inside the three grooves, auxiliary balance wings 4 are arranged at the top ends of the three fixing blocks 3, the shapes of the three auxiliary balance wings 4 are matched with the shapes of the fixing blocks 3, through holes are formed at the top ends of the three auxiliary balance wings 4 and the three fixing blocks 3, the through holes formed at the top ends of the auxiliary balance wings 4 are countersunk holes, the through holes formed at the top ends of the three fixing blocks 3 are respectively matched with the through holes formed at the top ends of the corresponding fixing blocks 3, and the through holes at the top ends of the three fixing blocks 3 are matched with the threaded holes arranged in the corresponding grooves, the three auxiliary balance wings 4 and the fixing blocks 3 are fixed with the PDC drill bit body 1 through bolts, the left and right ends of the three auxiliary balance wings 4 are provided with a plurality of radiating grooves 5, when the PDC drill bit rotates, the surfaces of the auxiliary balance wings 4 are contacted with the surface of a drilled hole, thereby stabilizing the rotary motion of the PDC drill bit, fixing the three auxiliary balance wings 4 and the fixed block 3 with the PDC drill bit body 1 through bolts, leading the auxiliary balance wings 4 to be conveniently mounted and dismounted, the shapes of the three auxiliary balance wings 4 are matched with the shape of the fixed block 3, so that the auxiliary balance wings 4 can play a better stabilizing effect, both ends all are provided with several radiating grooves 5 about through three supplementary balanced wing 4 for radiating groove 5 dispels the heat through reducing supplementary balanced wing 4 area.

Wherein, the top and the bottom of three work wing 2 all are provided with the discharge tank to the discharge tank is the semicircle ring-type, and every inside edges and corners department that discharges the tank all sets up to the fillet, makes PDC drill bit body 1 when drilling, and the discharge tank can play better chip removal effect, prevents to block up between work wing 2 and the supplementary balance wing 4.

Wherein, the top and the bottom of the inside bottom of three recess are provided with guide bar 6 respectively, and the bottom of three fixed block 3 all is provided with two guiding holes to the inside guide bar 6 that is provided with of recess cooperates with the guiding hole that 3 bottoms of fixed block were provided with, makes fixed block 3 have the guide effect when the installation, makes things convenient for fixed block 3 to fix a position.

Wherein, every side of three fixed block 3 is the slope to the slope is the state that reduces gradually in the top of fixed block 3 to the bottom of fixed block 3, and the inboard of recess and the outside phase-match of fixed block 3 make fixed block 3 place more smoothly when the recess is inside, and have better sealed effect, and the mode soil bits get into the inside of recess.

Wherein, the screw thread that sets up between three auxiliary balance wing 4 and the fixed block 3 is hexagon socket head cap screw for hexagon socket head cap screw is more convenient when dismantling and installing.

Wherein, the top and the bottom of three auxiliary balance wings 4 all set up to the arc surface for auxiliary balance wing 4's appearance is more pleasing to the eye.

Wherein, the top edges and corners of three auxiliary balance wings 4 all set up to the fillet for auxiliary balance wing 4 has better security performance, prevents that auxiliary balance wing 4 from fish tail arm when the installation.

Wherein, the connection relation between three fixed block 3 and the supplementary balanced wing 4 is the welding for have better fixed effect between fixed block 3 and the supplementary balanced wing 4.

In conclusion, when the PDC drill bit with the auxiliary balance wings is used, the auxiliary balance wings 4 are firstly installed, the fixing block 3 is placed in the groove, the guide holes formed in the fixing block 3 are aligned with the guide rods 6 arranged in the groove and matched with the guide holes, so that the fixing block 3 is conveniently positioned until the outer side of the fixing block 3 is contacted with the inner side of the groove, the bolts penetrate through the auxiliary balance wings 4 and the through holes formed in the fixing block 3 and are in threaded connection with the threaded holes in the groove until the auxiliary balance wings 4 are completely fixed, the three auxiliary balance wings 4 are installed in the same mode, when the auxiliary balance wings 4 are damaged too much and need to be replaced, the bolts used for fixing the auxiliary balance wings 4 are disassembled, the new auxiliary balance wings 4 are replaced, and when the PDC drill bit rotates, the surfaces of the auxiliary balance wings 4 are contacted with the drilling surfaces, thereby stabilizing the rotational motion of the PDC bit.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A PDC bit with secondary balance wings, comprising a PDC bit body (1), characterized in that: the PDC drill bit comprises a PDC drill bit body (1), wherein three working blades (2) which are uniformly distributed are arranged at the top end of the PDC drill bit body (1), grooves are formed between every two adjacent working blades (2) at the top end of the PDC drill bit body (1), the three grooves are obliquely arranged, threaded holes are formed in the bottom ends of the three grooves, fixed blocks (3) are arranged in the three grooves, auxiliary balance blades (4) are arranged at the top ends of the three fixed blocks (3), the shapes of the three auxiliary balance blades (4) are matched with the shapes of the fixed blocks (3), through holes are formed in the top ends of the three auxiliary balance blades (4) and the three fixed blocks (3), the through holes formed in the top ends of the auxiliary balance blades (4) are counter bores, and the through holes formed in the top ends of the three fixed blocks (3) are respectively matched with the through holes formed in the top ends of the corresponding fixed blocks (3), and the through-hole on three fixed block (3) top and the inside screw hole phase-match that is provided with of corresponding recess, it is three auxiliary balance wing (4) and fixed block (3) all fix with PDC drill bit body (1) through the bolt, and it is three both ends all are provided with several radiating grooves (5) about auxiliary balance wing (4).

2. The PDC bit having secondary balance wings of claim 1, wherein: the top and the bottom of three work wing (2) all are provided with and discharge the groove to discharge the groove and be semicircle ring-type, every discharge the inboard edges and corners department of groove and all set up to the fillet.

3. The PDC bit having secondary balance wings of claim 1, wherein: it is three the top and the bottom of the inside bottom of recess are provided with guide bar (6) respectively, and are three the bottom of fixed block (3) all is provided with two guiding holes to inside guide bar (6) that are provided with of recess and the guiding hole that fixed block (3) bottom was provided with cooperate.

4. The PDC bit having secondary balance wings of claim 1, wherein: each side face of each of the three fixing blocks (3) is a slope face, the slope faces are in a gradually-reduced state from the top end of each fixing block (3) to the bottom end of each fixing block (3), and the inner sides of the grooves are matched with the outer sides of the fixing blocks (3).

5. The PDC bit having secondary balance wings of claim 1, wherein: threads arranged between the three auxiliary balance wings (4) and the fixing block (3) are all hexagon socket head bolts.

6. The PDC bit having secondary balance wings of claim 1, wherein: the top ends and the bottom ends of the three auxiliary balance wings (4) are both provided with arc surfaces.

7. The PDC bit having secondary balance wings of claim 1, wherein: the top edges of the three auxiliary balance wings (4) are all set to be fillets.

8. The PDC bit having secondary balance wings of claim 1, wherein: the three fixing blocks (3) and the auxiliary balance wings (4) are all welded in connection.