CN220451775U - PDC drill bit with centralizer - Google Patents
PDC drill bit with centralizer Download PDFInfo
- Publication number
- CN220451775U CN220451775U CN202321931984.6U CN202321931984U CN220451775U CN 220451775 U CN220451775 U CN 220451775U CN 202321931984 U CN202321931984 U CN 202321931984U CN 220451775 U CN220451775 U CN 220451775U
- Authority
- CN
- China
- Prior art keywords
- drill bit
- centralizer
- bit body
- wall
- protection head
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Links
- 238000005553 drilling Methods 0.000 claims abstract description 24
- 229910003460 diamond Inorganic materials 0.000 claims description 8
- 239000010432 diamond Substances 0.000 claims description 8
- 230000000694 effects Effects 0.000 abstract description 4
- 230000005489 elastic deformation Effects 0.000 abstract description 3
- 238000009434 installation Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000003564 dental alloy Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model belongs to the technical field of PDC drill bits, and comprises a drill bit body, wherein a protection head is arranged above the drill bit body, a centralizer body is arranged above the protection head, a connecting block is arranged above the centralizer body, a rotating shaft is arranged in the connecting block, the drill bit body comprises a drill bit, and the drill bit is fixedly connected to the outer wall of the drill bit body. This PDC drill bit with centralizer is in the protection head inside under the spring normal state, when the drill bit body stretches out the protection head and digs the well during operation, the spring is compressed and takes place elastic deformation, when the drill bit body accomplished the well during operation, the drill bit body is retracted under the elasticity effect of spring and is protected the head inside, thereby to accomplishing the protection of drill bit body, can effectively prevent that the drill bit body from taking place to damage because external reason, the design of ball effectively reduces with the resistance in the wall of a well on the centralizer body, thereby can also reduce the drilling resistance of drill bit body to better stability drill bit body drilling direction simultaneously.
Description
Technical Field
The utility model relates to the technical field of PDC drill bits, in particular to a PDC drill bit with a centralizer.
Background
Short for polycrystalline diamond compact drill bit. The polycrystalline diamond compact bit is a drilling tool which is formed by welding a round shape of a compact on a cylindrical cutting tool in an embedded mode and is commonly used in the geological drilling industry.
Currently, in the prior art, chinese patent with bulletin number CN202560103U discloses an extension PDC drill bit with centralizer, this drill bit is provided with centralizer and API joint, be equipped with on the centralizer and fall the compound piece of reaming and PDC bit end, centralizer and API joint concentric and integrated into one piece structure, have absolute stability, so whether in the straight well section or in the whipping or falling well section, can both keep stability, but lack the device that protects the drill bit in the design of this drill bit, thereby can lead to the drill bit damage in the transportation and influence the efficiency of drilling operation, in view of this, we propose a PDC drill bit with centralizer.
Disclosure of Invention
The utility model mainly aims to provide a PDC drill bit with a centralizer, which can solve the problems in the background art.
In order to achieve the above-mentioned objective, the PDC drill bit with a centralizer provided by the present utility model comprises a drill bit body, a protection head is provided above the drill bit body, the drill bit body is protected under a normal state, the drill bit body is prevented from being damaged due to external reasons, a centralizer body is provided above the protection head, a device for stabilizing the drilling direction of the drill bit body is provided above the centralizer body, a connecting block is provided above the centralizer body, a rotating shaft is provided inside the connecting block for lengthening the centralizer or connecting with another drilling device, and the drill bit body rotates when rotating through the rotating shaft, thereby drilling work is performed, the drill bit body comprises:
the drill bit is fixedly connected to the outer wall of the drill bit body:
the diamond drill bit is particularly a polycrystalline diamond cutting tooth alloy drill bit, and is fixedly connected to the outer wall of the drill bit;
and the sliding sleeve is penetrated by the drill bit body and is rotationally connected with the drill bit body.
Preferably, the protection head outer wall is equipped with the drill bit, can carry out drilling work with the drill bit body cooperation, thereby reduce the protection through the rotation of drill bit and embolias the resistance in the well, the protection head outer wall is equipped with screw thread one, carries out threaded connection through screw thread one and thread groove one and accomplishes the connection and the split of protection head and centralizer, the fixed cover of protection head inner wall fixedly connected with, fixed cover outer wall fixedly connected with spring, the drill bit body is in the protection head inside under the spring normality, and the spring is compressed and takes place elastic deformation when the drill bit body stretches out the protection head and digs the well during operation, and the drill bit body retracts the protection of drill bit body inside the spring effect of spring to accomplish the protection of drill bit body, the one end fixed connection at the slip cap outer wall is kept away from to the spring for supporting fixed spring.
Preferably, the centralizer body is provided with a first thread groove, the first thread groove is connected with threads one, the centralizer body is convenient to mount and dismount with the protection head, and the centralizer body is provided with a second thread groove.
Preferably, the spiral groove is formed in the centralizer body, the balls are arranged in the spiral groove, the contact area between the centralizer body and a well wall in the well is reduced through the design of the balls, and the sliding friction force is converted into the rolling friction force with smaller resistance, so that the drilling direction of the drill bit body can be stabilized better, and the drilling resistance of the drill bit body is reduced.
Preferably, the connecting block is provided with a second thread, the connecting block is provided with a cross groove, the diameter of the cross groove is consistent with that of the cross lug, the whole device rotates along with the rotating shaft through sliding connection with the cross lug, so that drilling work is carried out, the connecting block is provided with a third thread for lengthening the centralizer or connecting with other drilling devices, and the third thread is in threaded connection with the second thread groove.
Preferably, the rotating shaft is fixedly connected with the drill bit body and used for rotating, so that the drill bit body and the rotating shaft rotate together to perform drilling work, and meanwhile, the drill bit body is pressed out of the protection head to perform drilling work, the rotating shaft is provided with four threads and used for lengthening the rotating shaft, the outer wall of the rotating shaft is fixedly connected with a cross lug, and the cross lug is slidably connected with a cross groove and used for driving the whole device to rotate.
Advantageous effects
The utility model provides a PDC drill bit with a centralizer. The beneficial effects are as follows:
(1) This PDC drill bit of area centralizer, the drill bit body is in the protection head inside under the spring normal state, and when the drill bit body stretches out the protection head and digs the well work, the spring is compressed and takes place elastic deformation, and when the drill bit body accomplished the well work, the drill bit body withdraws the protection head inside under the elasticity effect of spring to accomplish the protection of drill bit body, can prevent effectively that the drill bit body from taking place to damage because of external reason.
(2) According to the PDC drill bit with the centralizer, the contact area between the centralizer body and a well wall in the well is reduced through the design of the balls on the centralizer body, and the sliding friction force is converted into the rolling friction force with smaller resistance, so that the drilling direction of the drill bit body can be stabilized better, and meanwhile, the drilling resistance of the drill bit body is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of the overall three-dimensional structure of the present utility model;
FIG. 2 is a schematic perspective view of a drill bit and a protective head according to the present utility model;
FIG. 3 is a schematic view of a three-dimensional cross-sectional structure of a bit body and a protection head according to the present utility model;
FIG. 4 is a schematic perspective view of the centralizer body of the present utility model;
fig. 5 is a schematic perspective view of the connecting block according to the present utility model.
Reference numerals illustrate:
1. a bit body; 11. a drill; 12. a diamond bit; 13. a sliding sleeve; 2. protecting the head; 21. a drill blade; 22. a first thread; 23. a spring; 24. a fixed sleeve; 3. a centralizer body; 31. a first thread groove; 32. a spiral groove; 33. a ball; 34. a thread groove II; 4. a connecting block; 41. a second thread; 42. a cross groove; 43. a third thread; 5. a rotating shaft; 51. cross-shaped protruding blocks; 52. and a thread IV.
The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1-5, the present utility model provides a PDC drill bit with a centralizer, which comprises a drill bit body 1, a protection head 2 is arranged above the drill bit body 1, a centralizer body 3 is arranged above the protection head 2, a connection block 4 is arranged above the centralizer body 3, a rotation shaft 5 is arranged inside the connection block 4, the rotation shaft 5 is fixedly connected with the drill bit body 1, the rotation shaft 5 is provided with four threads 52, a cross bump 51 is fixedly connected with the outer wall of the rotation shaft 5, the cross bump 51 is slidably connected with a cross groove 42, the drill bit body 1 comprises a drill bit 11, the drill bit 11 is fixedly connected with the outer wall of the drill bit body 1, a diamond drill bit 12 is fixedly connected with the outer wall of the drill bit 11, and a sliding sleeve 13 is penetrated by the drill bit body 1 and rotatably connected with the drill bit body 1.
In the embodiment of the utility model, in order to protect the drill bit body 1, specifically, the outer wall of the protection head 2 is provided with the drill bit 21, the outer wall of the protection head 2 is provided with the first thread 22, the inner wall of the protection head 2 is fixedly connected with the fixed sleeve 24, the outer wall of the fixed sleeve 24 is fixedly connected with the spring 23, one end of the spring 23, which is far away from the fixed sleeve 24, is fixedly connected with the outer wall of the sliding sleeve 13, the centralizer body 3 is provided with the first thread 31, the first thread 31 is in threaded connection with the first thread 22, the centralizer body 3 is provided with the second thread 34, under normal state, the drill bit body 1 is positioned in the protection head 2, when drilling work is performed, the drill bit body 1 slowly rotates downwards towards the ground under the action of the rotating shaft 5, the spring 23 is extruded to elastically deform in the descending process of the drill bit body 1, and when the drill bit body 1 is in the work, the drill bit body 1 is retracted into the protection head 2 under the elastic action of the spring 23 at the moment, so that the protection of the drill bit body 1 is completed.
In the embodiment of the present utility model, in order to better stabilize the drilling direction of the drill bit body 1, specifically, the centralizer body 3 is provided with a spiral groove 32, the ball 33 is disposed in the spiral groove 32, the connecting block 4 is provided with a second thread 41, the connecting block 4 is provided with a cross groove 42, the connecting block 4 is provided with a third thread 43, and the third thread 43 is in threaded connection with the second thread groove 34.
In the utility model, when the drilling tool is used, the protection head 2 and the centralizer body 3 are firstly in threaded installation, then the centralizer body 3 and the connecting block 4 are in threaded installation, then the rotating shaft 5 is connected with the motor, the motor is started again, the rotating shaft 5 rotates under the action of the motor, the drill bit body 1 slowly rotates to descend and extend out of the protection head 2 to perform drilling operation, meanwhile, the protection head 2 and the centralizer body 3 rotate under the action of the rotating shaft 5, and when the drilling operation is completed, the drill bit body 1 returns to the inside of the protection head 2 under the action of the spring 23.
The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.
Claims (6)
1. The utility model provides a take PDC drill bit of centralizer, includes bit body (1), its characterized in that: the utility model discloses a drill bit, including drill bit body (1), drill bit body (1) top is equipped with protection head (2), protection head (2) top is equipped with centralizer body (3), centralizer body (3) top is equipped with connecting block (4), connecting block (4) inside is equipped with pivot (5), drill bit body (1) include:
the drilling tool (11), drilling tool (11) fixed connection is at drill bit body (1) outer wall:
the diamond drill bit (12), the said diamond drill bit (12) is fixedly connected to the outer wall of the bit (11);
and the sliding sleeve (13) is penetrated by the drill bit body (1) and is rotationally connected with the drill bit body (1).
2. The PDC drill bit with centralizer of claim 1, wherein: the outer wall of the protection head (2) is provided with a drill blade (21), the outer wall of the protection head (2) is provided with a first thread (22), the inner wall of the protection head (2) is fixedly connected with a fixed sleeve (24), the outer wall of the fixed sleeve (24) is fixedly connected with a spring (23), and one end, far away from the fixed sleeve (24), of the spring (23) is fixedly connected with the outer wall of the sliding sleeve (13).
3. The PDC drill bit with centralizer of claim 1, wherein: the centralizer comprises a centralizer body (3), wherein a first thread groove (31) is formed in the centralizer body (3), a first thread (22) is connected with the first thread groove (31) in a threaded mode, and a second thread groove (34) is formed in the centralizer body (3).
4. The PDC drill bit with centralizer of claim 1, wherein: the centralizer is characterized in that the centralizer body (3) is provided with a spiral groove (32), and balls (33) are arranged in the spiral groove (32).
5. The PDC drill bit with centralizer of claim 1, wherein: the connecting block (4) is provided with a second thread (41), the connecting block (4) is provided with a cross groove (42), the connecting block (4) is provided with a third thread (43), and the third thread (43) is in threaded connection with the second thread groove (34).
6. The PDC drill bit with centralizer of claim 1, wherein: the rotary shaft (5) is fixedly connected with the drill bit body (1), the rotary shaft (5) is provided with four threads (52), the outer wall of the rotary shaft (5) is fixedly connected with a cross lug (51), and the cross lug (51) is in sliding connection with the cross groove (42).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321931984.6U CN220451775U (en) | 2023-07-21 | 2023-07-21 | PDC drill bit with centralizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321931984.6U CN220451775U (en) | 2023-07-21 | 2023-07-21 | PDC drill bit with centralizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220451775U true CN220451775U (en) | 2024-02-06 |
Family
ID=89730692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321931984.6U Active CN220451775U (en) | 2023-07-21 | 2023-07-21 | PDC drill bit with centralizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220451775U (en) |
-
2023
- 2023-07-21 CN CN202321931984.6U patent/CN220451775U/en active Active
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