CN207879256U - Fishing type drill bit special for casing drilling - Google Patents
Fishing type drill bit special for casing drilling Download PDFInfo
- Publication number
- CN207879256U CN207879256U CN201820275776.8U CN201820275776U CN207879256U CN 207879256 U CN207879256 U CN 207879256U CN 201820275776 U CN201820275776 U CN 201820275776U CN 207879256 U CN207879256 U CN 207879256U
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- China
- Prior art keywords
- bit body
- casing
- mandrel
- drill bit
- fixture block
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- 238000005553 drilling Methods 0.000 title claims abstract description 40
- 238000005520 cutting process Methods 0.000 claims abstract description 41
- 239000003638 chemical reducing agent Substances 0.000 claims description 7
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 10
- 230000006835 compression Effects 0.000 abstract description 2
- 238000007906 compression Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000011435 rock Substances 0.000 abstract description 2
- 238000011084 recovery Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000003139 buffering effect Effects 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000010437 gem Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
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- Earth Drilling (AREA)
Abstract
The utility model discloses a salvaging type casing drilling special drill bit, which comprises a drill bit part, a casing part sleeved outside the drill bit part and a cutting part arranged at the front end of the drill bit part; in the normal drilling process, the drill bit part is connected with the sleeve part, and the cutting wing at the front end of the upper drill bit body is contacted with the bottom of the hole under the action of the buffer spring and the drill pressure, so that the rock at the bottom of the hole is comprehensively crushed; after drilling, a drill rod with a reducing joint enters the sleeve to be connected with the lower drill bit body, a series of actions such as limiting, releasing and the like are realized through compression, and the drill bit body and the cutting part can be taken out by lifting the drill rod. The whole structure is a pure mechanical structure, the design is simple, the layout is exquisite, the reliability of the recovery mechanism is high, and the manufacturing cost is low; the casing drilling process can be adopted in the broken stratum, and the problem that the casing of the broken stratum is difficult to lower is effectively solved.
Description
Technical field
The utility model belongs to drilling tool field, and in particular to a kind of salvagable casing drilling target drill.
Background technology
In crushed zone drilling process, often cave-in, chip off-falling phenomenon are serious, so occur drilling tool lift from the top and put down by
Phenomena such as resistance, rotation torque increase, ultimately causes a series of construction difficult problems such as return slag difficulty, bit freezing.For crushed zone at present
Layer, the technique on generally use tripping in casing off stratum.But encounter serious broken formation, carry brill after setting of casing often occur casing without
Method tripping in bottom hole needs constantly to recycle drifting, or even lower brill cleaning bottom of hole again, time-consuming and laborious, reduces drilling efficiency.
The appearance of Casing Drilling Technique solves above-mentioned problem, but target drill uses machinery in existing casing drilling technology
And hydraulic structure, it is complicated, expensive.
Invention content
In view of this, the purpose of this utility model is to provide a kind of easy reliable salvagable casing drilling special jewels
Head, to solve the problems, such as that the decentralization of broken formation casing is difficult.
In order to achieve the above objectives, the utility model provides the following technical solutions：A kind of salvagable casing drilling target drill,
Including bit head, the cannula portion being sleeved on outside bit head and the cutting portion being arranged at bit head front end；The bit head
Including end to end upper bit body, lower bit body and the mandrel and buffer shaft being inserted into upper and lower bit body；The mandrel
First half be path section, latter half of is major diameter section, is set with return spring in path section, described return spring one end is by mandrel
Major diameter section end face limits, and the other end is limited by the step surface I being arranged in upper bit body, and mandrel tail end is by being arranged in lower drill bit
Internal circlip limit；Lower bit body corresponding with mandrel major diameter section is equipped with the card that can be moved radially along lower bit body
Block, the empty slot of inlay card fixture block is offered in the major diameter section of mandrel, and fixture block falls into mandrel major diameter section when mandrel compresses return spring
In empty slot；The buffer shaft is located at cutting portion rear, mandrel front, and buffer shaft breech face is not in contact with each other with mandrel front end face,
Buffer spring is set on buffer shaft, the buffer spring is by being correspondingly arranged on step surface II and the buffer shaft in upper bit body
Protrusion limit；Stop screw is equipped between the fixture block and lower bit body；
The cutting portion is mainly made of the cutting wing and fixed pin；The cutting wing has several, corresponding to be sleeved on respectively
Can rotate on fixed pin and around fixed pin, each fixed pin correspondence be inserted into the through-hole at upper bit body front end and
Fixed pin is fastened on by screw on upper bit body；Each cutting wing is withstood under the action of buffer spring in buffer shaft front end；
Described sleeve pipe portion is mainly made of casing, casing short joint and slip ring, and casing short joint is equipped with step surface III, casing
End to end with casing short joint, slip ring withstands on the card slot that inlay card fixture block is cooperatively formed at the front end face of casing and with step surface III,
It is correspondingly provided with guide ramp on slip ring and fixture block；The wing slot for being caught in the cutting wing is correspondingly provided at casing short joint front end.
Further, it there are three the fixture blocks, is arranged circumferentially around lower bit body.
Further, it is threadedly coupled between the upper bit body and lower bit body.
Further, it is threadedly coupled between described sleeve pipe and casing short joint.
Further, the fixed pin is fastened by two screws, and two screws are correspondingly arranged at fixed pin both ends.
Further, further include and the lower matched reducer union of bit body tail end.
Further, it is detachably connected between the reducer union and lower bit body.
The beneficial effects of the utility model are：In normal drilling process, bit head is connect with cannula portion, before upper bit body
The cutting wing at end contacts under the action of buffer spring is with bit pressure with bottom hole, comprehensively broken bottom hole rock；After the completion of drilling, with change
It is connect with lower bit body in the drilling rod sleeve pipe of drive connector, by compression, a series of actions such as realization is limited, freed above carry
Drilling rod can be taken off bit head and cutting portion.Overall structure is pure mechanic structure, and design is simple, and layout exquisiteness, recovering mechanism can
By property height, manufacturing cost is low；Casing drilling technique can be used in broken formation, and it is tired to efficiently solve the decentralization of broken formation casing
Difficult problem.
Description of the drawings
In order to keep the purpose of this utility model, technical solution and advantageous effect clearer, the utility model provides as follows
Attached drawing illustrates：
Fig. 1 is the structure sectional view of the utility model；
Fig. 2 is the structure sectional view of bit head and cutting portion；
Fig. 3 is the sectional view along A-A of Fig. 2.
Specific implementation mode
Below in conjunction with attached drawing, the preferred embodiment of the utility model is described in detail.
As shown, the salvagable casing drilling target drill in the present embodiment, including bit head, it is sleeved on outside bit head
Cannula portion and the cutting portion that is arranged at bit head front end；The bit head include end to end upper bit body 1, under
Bit body 2 and the mandrel 3 being inserted into upper and lower bit body and buffer shaft 4；The first half of the mandrel 3 is path section, later half
Portion is major diameter section, return spring 5 is set in path section, 5 one end of the return spring is limited by the major diameter section end face on mandrel, another
End is limited by the step surface I 101 being arranged in upper bit body 1, and mandrel tail end is by being arranged the circlip in lower bit body 2
6 limits；Lower bit body 2 corresponding with mandrel major diameter section be equipped with can along the fixture block 7 that lower bit body 2 moves radially, mandrel
The empty slot 301 of inlay card fixture block 7 is offered in major diameter section, fixture block 7 falls into the sky of mandrel major diameter section when mandrel 3 compresses return spring 5
In slot 301；The buffer shaft 4 is located at cutting portion rear, mandrel front, and buffer shaft breech face does not connect mutually with mandrel front end face
Touch, be set with buffer spring 8 on buffer shaft 4, the buffer spring 8 by the step surface II 102 that is correspondingly arranged in upper bit body 1 with
And the protrusion 401 on buffer shaft 4 limits.
In bit head, axial direction of the circlip 6 with the cooperation limitation mandrel 3 of return spring 5 in bit head in lower bit body
Mobile space, and resetted after so that mandrel 3 is moved；Fixture block 7 plays the role of positioning, transmits torque and axial force.Mandrel does not compress multiple
When the spring 5 of position, mandrel major diameter section outside wall surface at this time jacks up fixture block, and the lower bit body outside wall surface of fixture block protrusion passes through the connection of fixture block
Effect makes bit head link together with cannula portion；When mandrel compresses return spring 5, fixture block at this time falls into the sky of mandrel major diameter section
In slot 301, to free bit head and cannula portion connection relation.Under normal circumstances, buffer shaft 4 is withstood under the effect of buffer spring 8
Each cutting wing in cutting portion, makes cutting portion be in open configuration, when cutting portion is collapsible into bit body 1, the cutting of contraction
Buffer shaft 4, buffer spring 8 is pressed to be in compressive state behind portion, since mandrel 3 and buffer shaft 4 have certain row in upper and lower bit body
Journey, therefore need to ensure that buffer shaft breech face is not in contact with each other with mandrel front end face, it prevents from interfering.
Cutting portion is mainly made of the cutting wing 9 and fixed pin 10；The cutting wing 9 has several, corresponding to be sleeved on respectively
It can rotate on fixed pin 10 and around fixed pin 10, each correspondence of the fixed pin 10 is inserted at 1 front end of upper bit body
In through-hole and fixed pin 10 is fastened on by screw 11 on upper bit body 1；It is withstood under the action of buffer spring respectively buffer shaft front end
Cut the wing.Each cutting wing 9 (can enclose) to be rotated around fixed pin 10, and fixed pin 10 by both ends screw 11 limit in hole, by buffering
Spring 8, buffer shaft 4 ensure that the cutting wing is in open configuration in drilling process, prevent bouncing of drilling tool in drilling process from causing to cut wing contraction,
Buffer spring 8 can also play cushioning effect with buffer shaft 4 when cutting the wing and hitting hole wall, to protect blade.
Cannula portion is mainly made of casing 12, casing short joint 13 and slip ring 14, and casing short joint 13 is equipped with step surface III
1301, casing 12 and casing short joint 13 are end to end, and slip ring 14 withstands at the front end face of casing and coordinates with step surface III 1301
The card slot of inlay card fixture block is formed, guide ramp 1401 is correspondingly provided on slip ring 14 and fixture block 7；It corresponds to and sets at casing short joint front end
There is the wing slot for being caught in the cutting wing.
The groundwork flow of the target drill is as follows：
By in bit head plug-in-sleeve short circuit 13, and make 7 inlay card of fixture block on lower bit body 2 in the step of casing short joint 13
At face III 1301, after being put into slip ring 14, casing 12 is screwed in withstand slip ring 14；The cutting wing 9 in cutting portion is jacked in buffer shaft 4
It opens and is caught in the wing slot of casing short joint 13 under effect.
When normal drilling, cannula portion creeps into load and passes to bit head by fixture block 7 and the cutting wing 9, and the cutting wing 9 is buffering
It is in open configuration under the action of axis 4, buffer spring 8 and drilling load, and is caught in the wing slot of casing short joint 13, realizes tunneling boring
Drilling.
After the completion of drilling, by the drilling rod equipped with reducer union 15 under 12 inner wall of casing is sent into shaft bottom, with bit head
Bit body 2 docks；In docking operation, 15 end face of reducer union is withstood mandrel 3 and is moved along upper and lower bit body inner wall；It has docked
Cheng Hou, the empty slot 301 in 3 major diameter section of mandrel is just in 7 lower section of fixture block.When carrying drilling rod, the fixture block 7 in bit head exists with slip ring 14
Under the guide ramp 1401 being fitted to each other acts on, fixture block 7 is radially done along lower bit body to be shunk, and fixture block 7 falls into 3 empty slot 301 of mandrel
It is interior, realize the separation of lower bit body 2 and casing short joint 13；Meanwhile the wing 9 is cut in front without space constraints and casing short joint
It under the collective effect that 13 front ends are pushed up forward, is rotated around fixed pin, buffer shaft 4 is pressed after 9 tail end of the cutting wing of rotation, realize cutting
The wing 9 slides into the action in casing short joint 13；Continue above to carry drilling rod, under the action of drilling rod axial force, you can complete bit head with
The extraction of cutting portion.
There are three fixture blocks 7 in the present embodiment, is arranged circumferentially around lower bit body 2, it is ensured that connection is reliable.
Stop screw 16 is equipped between fixture block 7 and lower bit body 2 in the present embodiment, stop screw 16 and mandrel 3 are for card
Block 7 has radial position-limiting action, prevents it from falling off in a free state.
It in the present embodiment, is threadedly coupled between upper bit body 1 and lower bit body 2, screw thread connects between casing 12 and casing short joint 13
It connects.
In the present embodiment, fixed pin 10 is fastened by two screws 11, and two screws 11 are correspondingly arranged at 10 both ends of fixed pin.
As being further improved for said program, further include and the lower matched reducer union 15 of 2 tail end of bit body, use
When be detachably connected between drilling rod and lower bit body respectively, can improve assembly flexibility.
Finally illustrate, preferred embodiment above is merely intended for describing the technical solutions of the present application, but not for limiting the present application, to the greatest extent
Pipe has been described in detail the utility model by above preferred embodiment, but those skilled in the art should manage
Solution, can in the form and details make it various changes, without departing from the utility model claims book institute
The range of restriction.
Claims (7)
1. a kind of salvagable casing drilling target drill, including bit head, the cannula portion that is sleeved on outside bit head and setting exist
Cutting portion at bit head front end；It is characterized in that：The bit head include end to end upper bit body, lower bit body with
And it is inserted into mandrel and buffer shaft in upper and lower bit body；The first half of the mandrel is path section, and latter half of is major diameter section,
Return spring is set in path section, described return spring one end is limited by the major diameter section end face on mandrel, and the other end is by being arranged upper
Step surface I in bit body limits, and mandrel tail end is limited by the circlip being arranged in lower bit body；With mandrel major diameter section
Corresponding lower bit body is equipped with the fixture block that can be moved radially along lower bit body, and inlay card fixture block is offered in the major diameter section of mandrel
Empty slot, fixture block mandrel compress return spring when fall into the empty slot of mandrel major diameter section；The buffer shaft be located at cutting portion rear,
In front of mandrel, and buffer shaft breech face is not in contact with each other with mandrel front end face, and buffer spring is set on buffer shaft, and the buffer spring is logical
Cross the protrusion limit on the step surface II and buffer shaft being correspondingly arranged in bit body；
Stop screw is equipped between the fixture block and lower bit body；
The cutting portion is mainly made of the cutting wing and fixed pin；The cutting wing has several, and correspondence is sleeved on each fixation
It can rotate on pin and around fixed pin, each fixed pin correspondence is inserted into the through-hole at upper bit body front end and fixes
Pin is fastened on by screw on upper bit body；Each cutting wing is withstood under the action of buffer spring in buffer shaft front end；
Described sleeve pipe portion is mainly made of casing, casing short joint and slip ring, and casing short joint is equipped with step surface III, casing and set
Pipe short circuit is end to end, and slip ring withstands on the card slot that inlay card fixture block is cooperatively formed at the front end face of casing and with step surface III, slip ring
With guide ramp is correspondingly provided on fixture block；The wing slot for being caught in the cutting wing is correspondingly provided at casing short joint front end.
2. salvagable casing drilling target drill according to claim 1, it is characterised in that：There are three the fixture blocks, around
Lower bit body is arranged circumferentially.
3. salvagable casing drilling target drill according to claim 1, it is characterised in that：The upper bit body and lower brill
It is threadedly coupled between head body.
4. salvagable casing drilling target drill according to claim 1, it is characterised in that：Described sleeve pipe and casing short joint
Between be threadedly coupled.
5. salvagable casing drilling target drill according to claim 1, it is characterised in that：The fixed pin passes through two
Screw fastens, and two screws are correspondingly arranged at fixed pin both ends.
6. according to any salvagable casing drilling target drill of Claims 1 to 5, it is characterised in that：Further include under
The matched reducer union of bit body tail end.
7. salvagable casing drilling target drill according to claim 6, it is characterised in that：The reducer union and lower brill
It is detachably connected between head body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820275776.8U CN207879256U (en) | 2018-02-26 | 2018-02-26 | Fishing type drill bit special for casing drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820275776.8U CN207879256U (en) | 2018-02-26 | 2018-02-26 | Fishing type drill bit special for casing drilling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207879256U true CN207879256U (en) | 2018-09-18 |
Family
ID=63498881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820275776.8U Active CN207879256U (en) | 2018-02-26 | 2018-02-26 | Fishing type drill bit special for casing drilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207879256U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108386135A (en) * | 2018-02-26 | 2018-08-10 | 中煤科工集团重庆研究院有限公司 | Fishing type drill bit special for casing drilling |
-
2018
- 2018-02-26 CN CN201820275776.8U patent/CN207879256U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108386135A (en) * | 2018-02-26 | 2018-08-10 | 中煤科工集团重庆研究院有限公司 | Fishing type drill bit special for casing drilling |
| CN108386135B (en) * | 2018-02-26 | 2019-04-30 | 中煤科工集团重庆研究院有限公司 | Fishing type drill bit special for casing drilling |
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| GR01 | Patent grant |