CN215804375U - Roller bit capable of switching coring without lifting drill - Google Patents
Roller bit capable of switching coring without lifting drill Download PDFInfo
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- CN215804375U CN215804375U CN202122067396.XU CN202122067396U CN215804375U CN 215804375 U CN215804375 U CN 215804375U CN 202122067396 U CN202122067396 U CN 202122067396U CN 215804375 U CN215804375 U CN 215804375U
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Abstract
The utility model discloses a roller bit capable of switching coring without lifting a drill, which comprises a bit matrix, a central hole which is arranged in the middle of the bit matrix and vertically penetrates through the bit matrix, a plurality of drilling roller wheels arranged on the periphery of the bottom end of the bit matrix, and a central bit which can be inserted into the central hole and clamped with the bit matrix, wherein the central bit comprises a central matrix which can be inserted into the central hole and clamped with the bit matrix, and a composite bit arranged at the bottom end of the central matrix. The roller bit can be switched between coring and efficient drilling, and the roller bit is not required to be taken out of the well integrally in the switching process, so that the drilling efficiency is greatly improved.
Description
Technical Field
The utility model relates to the field of deep sea drilling equipment, in particular to a roller bit capable of switching coring without lifting a drill.
Background
Abundant resources are stored in the stratum at the bottom of the ocean, and the analysis and research of samples of the stratum at the bottom of the ocean has extremely high scientific significance for revealing earthquake mechanisms and understanding the process of extreme climate and rapid climate change. For samples from deep sea formations, the most effective and direct way to obtain them is by deep sea drilling. In deep sea drilling operation, the operation environment and the construction conditions are more complicated than those of land drilling, the requirements on drilling process and drilling tool equipment are higher, and the construction cost is greatly increased. Therefore, the efficiency of deep sea drilling operation is improved, the operation time is saved, and the operation cost can be greatly reduced. In the deep sea drilling process, some stratums need to obtain stratum samples for scientific research, and some stratums do not need to obtain samples for improving the efficiency, so that the drilling modes of the stratums comprise a coring drilling mode and a comprehensive drilling mode, and the switching of the two drilling modes usually comprises the step of lifting the whole drilling tool away from the stratum to replace a drill bit and an internal coring tool, so that the drilling efficiency is low.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model provides a roller bit capable of switching coring without lifting a drill.
The technical scheme adopted by the utility model for solving the technical problems is as follows: the roller bit comprises a bit matrix, a central hole which is arranged in the middle of the bit matrix and vertically penetrates through the bit matrix, a plurality of drilling roller wheels which are arranged on the periphery of the bottom end of the bit matrix, and a central bit which can be inserted into the central hole and clamped with the bit matrix, wherein the central bit comprises a central matrix which can be inserted into the central hole and clamped with the bit matrix, and a composite bit which is arranged at the bottom end of the central matrix.
In the roller bit capable of switching coring without lifting the drill, the central carcass is provided with a protruding part protruding out of the outer side wall of the central carcass, and the inner side wall of the central hole is provided with a stopping part for stopping the protruding part.
In the roller bit capable of switching coring without lifting a drill, at least one clamping block is arranged on the protruding part, and at least one clamping groove for the clamping block to be clamped and connected is arranged on the blocking part;
or, the protruding part is provided with at least one clamping groove, and the blocking part is provided with at least one clamping block which can be clamped into the clamping groove.
In the roller cone drill bit capable of switching and coring without lifting the drill, the plurality of drilling roller cones are three drilling roller cones which are arranged at the same height position at the bottom end of the matrix of the drill bit at equal intervals.
In the roller bit capable of switching coring without lifting drilling, the bottom end of the bit matrix is provided with a connecting part for connecting with the drilling roller, the connecting part is provided with a through hole for a bolt to pass through, and the drilling roller is provided with a threaded hole for the bolt to be inserted into and screwed with.
In the roller bit capable of switching and coring without lifting the drilling, a fixed seat which is rotatably connected with the drilling roller is arranged in the drilling roller, and the threaded hole is arranged on the fixed seat.
In the roller bit capable of switching and coring without lifting the drilling, a movable sealing ring is sleeved between the top end of the fixed seat and the drilling roller, and the bottom end of the fixed seat is rotatably embedded and connected with the drilling roller through a thrust bearing.
In the roller bit capable of switching coring without lifting drilling, the middle part of the bottom end of the fixed seat is provided with a lubricating oil channel communicated with the threaded hole, and the lubricating oil channel is communicated with a gap between the fixed seat and the drilling roller.
In the roller bit capable of switching coring without lifting drilling, the middle part of the central matrix is provided with a drilling fluid channel, and the bottom end of the central matrix is provided with an inclined hole which is communicated with the drilling fluid channel and points to the drilling roller.
In the roller bit capable of switching and coring without lifting the drill, the PDC composite sheet is fixedly arranged on the composite bit, and the alloy teeth are fixedly arranged on the drilling roller.
The roller bit capable of switching and coring without lifting the drill has the following beneficial effects: when the roller bit is used, the top end of a bit matrix is connected with a drill rod or an upper part matched drilling tool, when a core needs to be drilled, a core taking pipe can be put into a central hole of the bit matrix through a rope and the like, the bit matrix and a drilling roller are driven to rotate through the drill rod and core taking is carried out, and after the core enters the core taking pipe, the rope is lifted to take the core taking pipe and the core in the core taking pipe out. When the drilling efficiency needs to be improved, the central drill bit can be put into the central hole through the rope until the central drill bit is clamped with the drill bit matrix. When the drill rod drives the drill bit matrix to rotate, the drill bit matrix simultaneously drives the central drill bit to rotate, and drilling efficiency is improved by increasing the number of the drill bits and the area of the drill bits. The roller bit can be switched between coring and efficient drilling, and the roller bit is not required to be taken out of the well integrally in the switching process, so that the drilling efficiency is greatly improved.
Drawings
The utility model will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic representation of a roller cone drill bit according to the present invention;
FIG. 2 is a schematic cross-sectional view taken along line A-A of a roller cone drill bit according to the present invention;
FIG. 3 is a schematic representation of a bottom construction of a roller cone drill bit of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, 2 and 3, in the first embodiment of the roller cone drill bit capable of performing non-lifting drilling and switching coring according to the present invention, the roller cone drill bit 1 comprises a bit carcass 2, a central hole 3 disposed in the middle of the bit carcass 2 and vertically penetrating the bit carcass 2, a plurality of drilling cones 4 disposed on the periphery of the bottom end of the bit carcass 2, and a central drill bit 5 insertable into the central hole 3 and engaged with the bit carcass 2, wherein the central drill bit 5 comprises a central carcass 6 insertable into the central hole 3 and engaged with the bit carcass 2, and a composite drill bit 22 disposed at the bottom end of the central carcass 6.
When the roller bit 1 is used, the top end of a bit matrix 2 is connected with a drill rod or an upper part matched drilling tool, when a core needs to be drilled, a core taking pipe can be put into a central hole 3 of the bit matrix 2 through a rope and the like, the bit matrix 2 and a drilling roller 4 are driven to rotate through the drill rod and core taking is carried out, and after the core enters the core taking pipe, the rope is lifted up to take out the core taking pipe and the core in the core taking pipe. When the drilling efficiency needs to be improved, the central drill bit 5 can be lowered into the central hole 3 through a rope until the central drill bit 5 is clamped with the drill bit matrix 2. When the drill rod drives the drill bit matrix 2 to rotate, the drill bit matrix 2 simultaneously drives the central drill bit 5 to rotate, and the drilling efficiency is improved by increasing the number of the drill bits and the area of the drill bits. The roller bit 1 can be switched between coring and efficient drilling, and the roller bit 1 does not need to be taken out of a well integrally in the switching process, so that the drilling efficiency is greatly improved.
It will be appreciated that the top end of the bit casing 2 is provided with external threads which may be used for connection to a drill pipe or upper drill string.
In order to prevent the central drill bit 5 from passing through the central hole 3 as a whole, the central casing 6 is provided with a protrusion 7 protruding from the outer side wall of the central casing 6, and the inner side wall of the central hole 3 is provided with a stopper 8 for stopping the protrusion 7. Preferably, the protrusion 7 and the stopper 8 are both circular.
When the composite drill bit 22 at the bottom end of the central drill bit 5 is lowered to be flush with the drilling cone 4, the protrusion 7 abuts against the stopper 8, and the central drill bit 5 is stopped from being lowered continuously.
In the present embodiment, at least one engaging block 9 is disposed on the protruding portion 7, and at least one engaging groove 10 for the engaging block 9 to be engaged is disposed on the stopping portion 8.
When the central drill bit 5 is placed downwards, the central drill bit 5 and the drill bit matrix 2 can be clamped until the clamping block 9 is aligned with the clamping groove 10 to be clamped. When the cartridge 9 and the pocket 10 are misaligned, the center drill 5 may be rotated to align and capture the cartridge 9 and the pocket 10.
In other embodiments, at least one slot is disposed on the protrusion 7, and at least one block capable of being inserted into the slot is disposed on the stop 8.
Preferably, the plurality of drilling roller cones 4 are three drilling roller cones 4, and the three drilling roller cones 4 are arranged at the same height position at the bottom end of the bit matrix 2 at equal intervals.
Further, in order to facilitate the disassembly and assembly and maintenance of the drilling roller cone 4, a connecting portion 11 for connecting with the drilling roller cone 4 is arranged at the bottom end of the drill bit carcass 2, a through hole for allowing a bolt 13 to pass through is formed in the connecting portion 11, and a threaded hole 12 for allowing the bolt 13 to be inserted into and screwed into is formed in the drilling roller cone 4.
Specifically, a fixing seat 14 rotatably connected with the drilling cone 4 is arranged in the drilling cone 4, and the threaded hole 12 is arranged on the fixing seat 14. A dynamic seal ring 15 is sleeved between the top end of the fixed seat 14 and the drilling cone 4, and the bottom end of the fixed seat 14 and the drilling cone 4 are rotatably embedded and connected through a thrust bearing 16.
Further, a lubricating oil channel 17 communicated with the threaded hole 12 is arranged in the middle of the bottom end of the fixed seat 14, and the lubricating oil channel 17 is communicated with a gap between the fixed seat 14 and the drilling cone 4.
Further, a drilling fluid passage 18 is arranged in the middle of the central matrix 6, and an inclined hole 19 which is communicated with the drilling fluid passage 18 and points to the drilling roller cone 4 is arranged at the bottom end of the central matrix 6.
Preferably, the composite bit 22 is fixedly provided with the PDC composite sheet 20, and the drilling cone 4 is fixedly provided with the alloy teeth 21.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The roller bit capable of switching coring without lifting drilling is characterized by comprising a bit matrix, a center hole, a plurality of drilling roller wheels and a center bit, wherein the center hole is formed in the middle of the bit matrix and vertically penetrates through the bit matrix, the plurality of drilling roller wheels are arranged on the periphery of the bottom end of the bit matrix, the center bit can be inserted into the center hole and clamped with the bit matrix, and the center bit comprises a center matrix and a composite bit, the center matrix can be inserted into the center hole and clamped with the bit matrix, and the composite bit is arranged at the bottom end of the center matrix.
2. The roller cone drill bit capable of switching over coring without pulling a drill according to claim 1, wherein the central carcass is provided with a protrusion protruding from an outer sidewall of the central carcass, and a stopper for stopping the protrusion is provided on an inner sidewall of the central bore.
3. The roller bit capable of switching coring without pulling a drill according to claim 2, wherein the protrusion is provided with at least one fixture block, and the stopper is provided with at least one clamping groove for the fixture block to be clamped and connected;
or, the protruding part is provided with at least one clamping groove, and the blocking part is provided with at least one clamping block which can be clamped into the clamping groove.
4. The roller cone drill bit capable of switching coring without pulling a drill according to claim 1, wherein the plurality of drilling roller cones are three drilling roller cones, and the three drilling roller cones are arranged at the same height position at the bottom end of the bit matrix at equal intervals.
5. The roller bit capable of switching coring without lifting a drill according to claim 1, wherein a connecting portion for connecting with the drilling roller is provided at a bottom end of the bit body, the connecting portion is provided with a through hole for a bolt to pass through, and the drilling roller is provided with a threaded hole for the bolt to be inserted into and screwed with.
6. The roller cone drill bit capable of switching coring without lifting a drill according to claim 5, wherein a fixed seat rotatably connected with the drilling roller cone is arranged in the drilling roller cone, and the threaded hole is arranged on the fixed seat.
7. The roller bit capable of switching coring without lifting drilling according to claim 6, wherein a dynamic seal ring is sleeved between the top end of the fixing seat and the drilling roller, and the bottom end of the fixing seat is rotatably connected with the drilling roller in an embedded manner through a thrust bearing.
8. The roller cone drill bit capable of switching over coring without lifting a drill according to claim 7, wherein a lubricating oil channel communicated with the threaded hole is formed in the middle of the bottom end of the fixed seat, and the lubricating oil channel is communicated with a gap between the fixed seat and the drilling roller cone.
9. The roller cone drill bit capable of switching coring without lifting a drill according to claim 1, wherein a drilling fluid passage is provided in the middle of the central carcass, and an inclined hole communicated with the drilling fluid passage and directed to the drilling roller cone is provided at the bottom end of the central carcass.
10. The roller cone drill bit capable of switching to coring without pulling a drill according to claim 1, wherein a PDC composite sheet is fixedly arranged on the composite drill bit, and alloy teeth are fixedly arranged on the drilling roller cone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122067396.XU CN215804375U (en) | 2021-08-30 | 2021-08-30 | Roller bit capable of switching coring without lifting drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122067396.XU CN215804375U (en) | 2021-08-30 | 2021-08-30 | Roller bit capable of switching coring without lifting drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215804375U true CN215804375U (en) | 2022-02-11 |
Family
ID=80153645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122067396.XU Active CN215804375U (en) | 2021-08-30 | 2021-08-30 | Roller bit capable of switching coring without lifting drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215804375U (en) |
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2021
- 2021-08-30 CN CN202122067396.XU patent/CN215804375U/en active Active
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