CN219974409U - Diameter-variable reamer bit - Google Patents
Diameter-variable reamer bit Download PDFInfo
- Publication number
- CN219974409U CN219974409U CN202320585986.8U CN202320585986U CN219974409U CN 219974409 U CN219974409 U CN 219974409U CN 202320585986 U CN202320585986 U CN 202320585986U CN 219974409 U CN219974409 U CN 219974409U
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- reaming
- spline shaft
- connecting cylinder
- diameter
- joint
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- 230000006835 compression Effects 0.000 claims abstract description 28
- 238000007906 compression Methods 0.000 claims abstract description 28
- 239000000725 suspension Substances 0.000 claims description 24
- 230000006978 adaptation Effects 0.000 claims 1
- 238000005553 drilling Methods 0.000 description 17
- 238000000034 method Methods 0.000 description 12
- 230000009471 action Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Earth Drilling (AREA)
Abstract
The utility model discloses a variable-diameter reaming bit which comprises an upper joint, a tool apron, a spline shaft, a supporting cone, reaming blades, a connecting cylinder, a hanging joint, a compression spring, a ball seat and a conventional bit, wherein one end of the upper joint is in threaded connection with one end of the tool apron, the upper joint and the interior of the tool apron are hollow, the spline shaft is arranged in the tool apron, the reaming blades are clamped at the end of the tool apron, the end of the spline shaft is fixedly connected with the hanging joint, the hanging joint is arranged in the connecting cylinder, and one side of the hanging joint is abutted against the compression spring. This variable diameter reamer bit adopts the blade of equidimension through setting up the reaming blade, guarantees that the atress and the cutting volume of every blade are basically even, has improved the life of reaming blade, because the bottom butt face that supports centrum and reaming blade sets up for the slope, when retrieving the reaming blade, the lower extreme of blade holder is slided to the bottom of reaming blade smoothly, the extension and the shrink of reaming blade of being convenient for, the play of the drill bit of being convenient for.
Description
Technical Field
The utility model relates to the technical field of coalbed methane drilling technology, in particular to a variable-diameter reaming bit.
Background
The casing drilling technique is a special drilling method. Namely, the casing is pressed in or rotated to be driven in while drilling; or the casing is pressed in advance or rotated to be run in, and then the drilling tool is drilled. The method can prevent hole wall collapse or sand-flowing filling and drilling in the drilling process, is suitable for drilling loose stratum and sand-flowing layer, and is generally the same as large-diameter engineering drilling.
The conventional casing drilling technology combines a drill bit and a casing pipe, transmits power to the drill bit through the casing pipe, realizes casing drilling, and after drilling, the drill bit cannot be started up and can only be left under the well because the diameter of the drill bit is larger than the diameter of the casing pipe, so that the conventional casing drilling is basically one-time construction and cannot perform construction of lower working procedures, and thus, although the requirements on a vertical well and a directional well can be basically met, the implementation of the lower working procedures of a horizontal well cannot be guaranteed.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the utility model provides the variable-diameter reaming bit which has the advantage that the heel tube drilling bit is convenient to start from the inside of the heel tube, and solves the problems proposed by the background art.
(II) technical scheme
In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a variable diameter reamer bit, including the upper joint, the blade holder, the spline shaft, support the centrum, the reaming wing, the connecting cylinder, hang the joint, compression spring, ball seat and conventional drill bit, the one end threaded connection of upper joint and blade holder, the inside of upper joint and blade holder is hollow design, the inside at the blade holder is installed to the spline shaft, reaming wing joint is in the end department of blade holder, the end department of spline shaft and suspension joint fixed connection, suspension joint sets up in the inside of connecting cylinder, suspension joint's one side and compression spring butt, the ball seat sets up inside the connecting cylinder, conventional drill bit is installed on the ball seat.
The upper joint is fixedly connected with an external drill rod, a stepped groove is formed in the inner wall of the tool holder, a tool clamping groove is formed in the outer surface of the tool holder, a flange is arranged at the end part of the spline shaft and is clamped on the stepped groove of the tool holder, a reaming blade is clamped on the tool clamping groove of the tool holder, a key block is arranged on the surface of the spline shaft, a key groove matched with the key block is formed in the inner wall of the tool holder, and the tool holder is connected with the stepped groove through a key.
The suspension joint is fixedly arranged at the end part of the spline shaft, the diameter of the suspension joint is larger than that of the spline shaft, a key slot matched with a key block on the spline shaft is formed in the inner wall of the support cone, and the support cone is connected with the spline shaft through keys.
The end of the supporting cone is in threaded connection with the connecting cylinder, a stepped through groove is formed in the connecting cylinder, the outer diameter of the hanging joint is the same as the inner diameter of the through groove of the connecting cylinder, and a gap is reserved between the connecting cylinder and the hanging joint.
Preferably, the edges of the upper joint, the tool apron, the spline shaft, the supporting cone, the connecting cylinder and the hanging joint are all provided with chamfers, and the diameter of the conventional drill bit is between the diameter of the reaming blade when the extension is maximum and the diameter of the reaming blade when the reaming blade is contracted.
Preferably, the number of the reaming blades is four, the sizes of the four reaming blades are different, the diameter and the thickness of the first-stage reaming blade are minimum, and the diameter and the thickness of the fourth-stage reaming blade are maximum.
Preferably, the cutter clamping groove is obliquely arranged, the inclination angle of the cutter clamping groove is 10 degrees, the end part of the supporting cone body is provided with a chute which is matched with the four reaming blades, the surface of the chute is in butt joint with the bottoms of the reaming blades, the inclination angle of the chute is 10 degrees, the chute and the cutter clamping groove are vertically arranged, and the surfaces of the reaming blades are provided with a plurality of small holes which are linearly distributed.
Preferably, the flange at the end part of the spline shaft is provided with expansion grooves, the number of key blocks positioned on the outer surface of the spline shaft is four, and the four key blocks are circumferentially distributed relative to the outer surface of the spline shaft.
Preferably, the compression spring is arranged between the end of the suspension joint and the connecting cylinder, the compression spring device is connected with the inside of the stepped through groove of the connecting cylinder, the ball seat is fixedly arranged on the inner wall of the stepped through groove of the connecting cylinder, and the conventional drill bit is arranged at the end part of the connecting cylinder.
Preferably, one side of the suspension joint is abutted with the end part of the compression spring, the outer wall of the compression spring is abutted with the inner wall of the connecting cylinder, and the movable range of the suspension joint is from the compression spring to the joint of the supporting cone and the spline shaft.
Preferably, the maximum diameter of the outer surface of the upper joint is the same as the outer diameter of the cutter holder and the outer diameter of the supporting cone, one side of the outer surface of the connecting cylinder is stepped, and the edge of the end part of the conventional drill bit is arc-shaped.
(III) beneficial effects
Compared with the prior art, the utility model provides the variable-diameter reaming bit, which has the following beneficial effects:
1. according to the variable diameter reaming bit, the reaming blades are arranged to be different in size, the blades are distributed in a step shape, the stress and the cutting quantity of each blade are basically average, the damage to the blades is avoided, and the service life of the reaming blades is prolonged.
2. This variable diameter reamer bit, because the bottom butt face of support centrum and reaming sword wing sets up for the slope, and perpendicular with the cutter draw-in groove, when retrieving the reaming sword wing, the lower extreme of blade holder is slided to the bottom of reaming sword wing can be smooth, the extension and the shrink of reaming sword wing of being convenient for, the play of drill bit.
Drawings
FIG. 1 is a schematic cross-sectional view of a variable diameter reamer bit according to the present utility model;
FIG. 2 is a schematic diagram of the front view of the variable diameter reamer bit according to the present utility model;
FIG. 3 is an enlarged schematic view of the portion A of FIG. 1 of the variable diameter reamer bit according to the present utility model;
fig. 4 is a schematic three-dimensional structure of a spline shaft of a variable diameter reamer bit according to the present utility model.
In the figure: 1. an upper joint; 2. a tool apron; 21. a stepped groove; 22. a cutter clamping groove; 3. a spline shaft; 31. a flange; 32. an expansion tank; 33. a key block; 4. supporting the vertebral body; 5. reaming blades; 7. a connecting cylinder; 8. a slit; 9. a suspension joint; 10. a compression spring; 11. a ball seat; 12. conventional drill bits.
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.
Example 1:
referring to fig. 1 to 2, the present utility model provides the following technical solutions: the diameter-variable reaming drill bit comprises an upper joint 1, a tool apron 2, a spline shaft 3, a supporting cone 4, reaming blades 5, a connecting cylinder 7, a hanging joint 9, a compression spring 10, a ball seat 11 and a conventional drill bit 12, wherein one end of the upper joint 1 is in threaded connection with one end of the tool apron 2, the inner parts of the upper joint 1 and the tool apron 2 are hollow, the spline shaft 3 is arranged in the tool apron 2, the reaming blades 5 are clamped at the end of the tool apron 2, the end of the spline shaft 3 is fixedly connected with the hanging joint 9, the hanging joint 9 is arranged in the connecting cylinder 7, one side of the hanging joint 9 is abutted against the compression spring 10, the ball seat 11 is arranged in the connecting cylinder 7, the conventional drill bit 12 is arranged on the ball seat 11, chamfer angles are arranged at the edges of the upper joint 1, the tool apron 2, the spline shaft 3, the supporting cone 4, the connecting cylinder 7 and the hanging joint 9, the diameter of the conventional drill bit 12 is between the diameter of the reaming blade 5 when the extension is maximum and the diameter of the reaming blade 5 when the reaming blade 5 is contracted, the upper joint 1 is fixedly connected with an external drill rod, a stepped groove 21 is formed in the inner wall of the tool holder 2, a tool clamping groove 22 is formed in the outer surface of the tool holder 2, a flange 31 is arranged at the end part of the spline shaft 3, the flange 31 is clamped on the stepped groove 21 of the tool holder 2, the reaming blade 5 is clamped on the tool clamping groove 22 of the tool holder 2, a key block 33 is arranged on the surface of the spline shaft 3, a key groove matched with the key block 33 is formed in the inner wall of the tool holder 2, the tool holder 2 is connected with the stepped groove 21 by a key, the hanging joint 9 is fixedly arranged at the end part of the spline shaft 3, the diameter of the hanging joint 9 is larger than the diameter of the spline shaft 3, a key groove matched with the key block 33 on the spline shaft 3 is formed in the inner wall of the supporting cone 4, the supporting cone 4 is connected with the spline shaft 3 by a key, the end of the supporting cone 4 is in threaded connection with the connecting cylinder 7, a stepped through groove is formed in the connecting cylinder 7, the outer diameter of the hanging joint 9 is the same as the inner diameter of the through groove of the connecting cylinder 7, and a gap 8 is reserved between the connecting cylinder 7 and the hanging joint 9.
When the reamer is used, the upper joint 1 is connected with a drill rod, drilling pressure and torque are transmitted, the upper joint 1 is in threaded connection with the tool apron 2, drilling torque is transmitted, the tool apron 2 is in key connection with the spline shaft 3, the spline shaft 3 transmits torque force to the support cone 4, the support cone 4 and the tool apron 2 are fixed in circumferential positions through the spline shaft 3, the reaming blades 5 are installed between the tool apron 2 and the support cone 4, the reaming blades 5 are expanded and contracted by pushing down and lifting up the tool apron 2, in addition, the lower end of the spline shaft 3 is connected with the suspension joint 9, the suspension joint 9 pushes down the compression spring 10 to be positioned on the inner step surface of the connecting cylinder 7 during reaming, at the moment, the reaming blades 5 are completely opened, and reaming operation is started. When the support cone 4 is lifted and recovered, the reaming blades 5 are completely retracted along the inclined plane of the support cone 4, and the upper part of the suspension joint 9 is positioned on the lower end surface of the support cone 4 to drive the support cone 4, the connecting cylinder 7 and the conventional drill bit 12 to be lifted together.
Example 2:
referring to fig. 1 to 4, the present utility model provides the following technical solutions: the number of the reaming blades 5 is four, the sizes of the four reaming blades 5 are different, the diameter and thickness of the first-stage reaming blade 5 are minimum, the diameter and thickness of the fourth-stage reaming blade 5 are maximum, the cutter clamping groove 22 is obliquely arranged, the inclination angle of the cutter clamping groove 22 is 10 degrees, the end part of the supporting cone 4 is provided with a chute which is matched with the four reaming blades 5, the surface of the chute is abutted with the bottom of the reaming blade 5, the inclination angle of the chute is 10 degrees, the chute is vertically arranged with the cutter clamping groove 22, a plurality of small holes which are linearly distributed are formed on the surface of the reaming blade 5, the flange 31 at the end part of the spline shaft 3 is provided with an expansion groove 32, the key blocks 33 positioned on the outer surface of the spline shaft 3 are arranged at four, the four key blocks 33 are circumferentially distributed with respect to the outer surface of the spline shaft 3, compression spring 10 sets up between the end department of suspension joint 9 and connecting cylinder 7, compression spring 10 device connecting cylinder 7's echelonment leads to the inslot portion, ball seat 11 fixed mounting is on connecting cylinder 7's echelonment leads to the inslot wall, conventional drill bit 12 sets up the tip at connecting cylinder 7, suspension joint 9 with one side with compression spring 10's tip butt, compression spring 10's outer wall and connecting cylinder 7's inner wall butt, suspension joint 9 movable range is in compression spring 10 to support cone 4 and spline shaft 3 key connection department, the maximum diameter department of upper joint 1 surface is the same with the external diameter of blade holder 2 and the external diameter of support cone 4, one side echelonment of connecting cylinder 7's surface, conventional drill bit 12's tip border department is the arc setting.
When in use, the compression spring 10 is placed in the connecting cylinder 7, and when the reaming position is not reached, the slight bit resistance can not expand the reaming blades 5, so that the reaming blades can smoothly fall into the reaming position. After the reaming is completed, the compression spring 10 rebounds to assist the reaming blade 5 to recover when the pipe column is lifted, and in addition, when the reaming blade 5 still cannot recover under the action of the compression spring 10 when the pipe column is lifted, the reaming blade 5 is forced to completely retract by throwing a ball and pressing in the pipe, so that the connecting cylinder 7 is separated from the cutter holder 2 by the downward supporting cone 4. And because the superposition of the reaming blade 5 and the supporting 4 cone is less, the reaming blade 5 is safe during drilling, and the radial superposition of the connecting part of the reaming blade 5 and the tool apron 2 is increased on the premise that the recovery of the reaming blade 5 is not influenced due to the circular arc design at the inner side of the end part of the reaming blade 5, so that the reaming blade 5 can work conveniently.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a variable diameter reamer bit, includes top connection, blade holder, spline shaft, supports centrum, reaming wing, connecting cylinder, suspension joint, compression spring, ball seat and conventional drill bit, its characterized in that: one end of the upper joint is in threaded connection with one end of the tool apron, the upper joint and the inside of the tool apron are hollow, the spline shaft is arranged in the tool apron, the reaming blade is clamped at the end of the tool apron, the end of the spline shaft is fixedly connected with the suspension joint, the suspension joint is arranged in the connecting cylinder, one side of the suspension joint is abutted with the compression spring, the ball seat is arranged in the connecting cylinder, and the conventional drill bit is arranged on the ball seat;
the upper joint is fixedly connected with an external drill rod, a stepped groove is formed in the inner wall of the tool holder, a tool clamping groove is formed in the outer surface of the tool holder, a flange is arranged at the end part of the spline shaft and is clamped on the stepped groove of the tool holder, a reaming blade is clamped on the tool clamping groove of the tool holder, a key block is arranged on the surface of the spline shaft, a key groove matched with the key block is formed in the inner wall of the tool holder, and the tool holder is connected with the stepped groove by keys;
the suspension joint is fixedly arranged at the end part of the spline shaft, the diameter of the suspension joint is larger than that of the spline shaft, a key slot matched with a key block on the spline shaft is formed in the inner wall of the support cone, and the support cone is connected with the spline shaft through keys;
the end of the supporting cone is in threaded connection with the connecting cylinder, a stepped through groove is formed in the connecting cylinder, the outer diameter of the hanging joint is the same as the inner diameter of the through groove of the connecting cylinder, and a gap is reserved between the connecting cylinder and the hanging joint.
2. The variable diameter reamer bit of claim 1, wherein: the edges of the upper joint, the tool apron, the spline shaft, the supporting cone, the connecting cylinder and the hanging joint are all provided with chamfers, and the diameter of the conventional drill bit is between the diameter of the reaming blade when the extension is maximum and the diameter of the reaming blade when the reaming blade is contracted.
3. The variable diameter reamer bit of claim 1, wherein: the number of the reaming blades is four, the sizes of the four reaming blades are different, the diameter and the thickness of the first-stage reaming blade are minimum, and the diameter and the thickness of the fourth-stage reaming blade are maximum.
4. The variable diameter reamer bit of claim 1, wherein: the cutter draw-in groove is the slope setting, and the inclination of cutter draw-in groove is 10 degrees, supports the chute that the tip of centrum offered with four reaming wings homophase adaptations, the surface and the bottom butt of reaming wings of chute, and the inclination of chute is 10 degrees, and chute and cutter draw-in groove are perpendicular setting, have offered a plurality of apertures that are linear distribution on the reaming wing surface.
5. The variable diameter reamer bit of claim 1, wherein: the flange at the end part of the spline shaft is provided with expansion grooves, key blocks positioned on the outer surface of the spline shaft are arranged in four, and the four key blocks are circumferentially distributed relative to the outer surface of the spline shaft.
6. The variable diameter reamer bit of claim 1, wherein: the compression spring is arranged between the end head of the suspension joint and the connecting cylinder, the compression spring device is arranged in the stepped through groove of the connecting cylinder, the ball seat is fixedly arranged on the inner wall of the stepped through groove of the connecting cylinder, and the conventional drill bit is arranged at the end part of the connecting cylinder.
7. The variable diameter reamer bit of claim 1 or 6, wherein: one side of the suspension joint is abutted with the end part of the compression spring, the outer wall of the compression spring is abutted with the inner wall of the connecting cylinder, and the movable range of the suspension joint is from the compression spring to the joint of the supporting cone and the spline shaft.
8. The variable diameter reamer bit of claim 1 or 6, wherein: the maximum diameter of the outer surface of the upper joint is the same as the outer diameter of the tool apron and the outer diameter of the supporting cone, one side of the outer surface of the connecting cylinder is stepped, and the edge of the end part of the conventional drill bit is arc-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320585986.8U CN219974409U (en) | 2023-03-23 | 2023-03-23 | Diameter-variable reamer bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320585986.8U CN219974409U (en) | 2023-03-23 | 2023-03-23 | Diameter-variable reamer bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219974409U true CN219974409U (en) | 2023-11-07 |
Family
ID=88596944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320585986.8U Active CN219974409U (en) | 2023-03-23 | 2023-03-23 | Diameter-variable reamer bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219974409U (en) |
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2023
- 2023-03-23 CN CN202320585986.8U patent/CN219974409U/en active Active
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