CN106150347A - Reverse impactor - Google Patents
Reverse impactor Download PDFInfo
- Publication number
- CN106150347A CN106150347A CN201510164300.8A CN201510164300A CN106150347A CN 106150347 A CN106150347 A CN 106150347A CN 201510164300 A CN201510164300 A CN 201510164300A CN 106150347 A CN106150347 A CN 106150347A
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- China
- Prior art keywords
- fastener
- rotary body
- housing
- reverse impactor
- sliding
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Abstract
The present invention relates to a kind of reverse impactor, including: housing, the inner circumferential wall of housing is configured with sliding tray；The rotary body being arranged in housing, rotary body is connected with drill bit；And the fastener that rotary body and housing kept together, the sliding end in fastener includes being contained in sliding tray and coordinated with sliding tray slidingtype.Wherein, in use, in fastener can make the rotary body being connected with drill bit be maintained at housing and can bear drilling well produce vibration and load.This reverse impactor is used to can guarantee that being smoothed out of drillng operation.
Description
Technical field
The present invention relates to field of oil drilling, particularly relate to a kind of reverse impactor.
Background technology
Reverse impactor is a kind of auxiliary rock instrument, can be converted to circumference toward double action by the hydraulic energy of fluid
The mechanical energy made, to apply reciprocating impulse in the circumferential to drill bit, prevents drill chuck in the earth formation, makes whole brill
Well process stabilization.
In the prior art, the structure of reverse impactor is complex, especially in its position being connected with drill bit,
Part is more.In drilling process, especially during harder stratum is carried out drilling well, this structure
Complicated reverse impactor is difficult to bear vibration and the load that drilling well produces, and easily causes its internal structure to be damaged,
Thus easily cause the structure of part reverse impactor and drill bit to be lost in well, affect further underground work.
Accordingly, it would be desirable to a kind of reverse impactor that can guarantee that drillng operation is smoothed out.
Summary of the invention
For the problems referred to above, the present invention proposes a kind of reverse impactor, uses this reverse impactor can guarantee that
Drillng operation is smoothed out.
The present invention proposes a kind of reverse impactor, including: housing, the inner circumferential wall of housing is configured with cunning
Dynamic groove；The rotary body being arranged in housing, rotary body is connected with drill bit；And rotary body is maintained at housing
Fastener together, the sliding end in fastener includes being contained in sliding tray and coordinated with sliding tray slidingtype；Wherein,
In use, in fastener can make the rotary body being connected with drill bit be maintained at housing and can bear drilling well produce vibration
And load.
The reverse impactor of the application of the invention, fastener can make housing and rotary body in axial direction (that is, right
Fastener produce shearing force direction) relative motion be prevented from, it is ensured that rotate physical ability be effectively maintained in housing,
And then ensure that drill bit can be connected with the effective of reverse impactor.This connected mode is relatively stable, can guarantee that torsion
Turn impacter in operation process, keep Stability Analysis of Structures, be hardly damaged, thus ensure that the complete of reverse impactor
Property, reverse impactor and coupled drill bit will not be lost in well, and then ensure that drillng operation can be smoothly
Carry out.Additionally, what fastener was integrated, simple in construction, intensity is higher, it is thus possible to effectively carry what drilling well produced
Vibration and load, it is ensured that being smoothed out of drillng operation.
In one embodiment, extending radially inwardly and be provided with slotting road in the peripheral side of rotary body, fastener is also
Including the inserted terminal being connected with sliding end, inserted terminal is contained in slotting road.Wherein, fastener Neng Yancha road slides into
Within sliding end is completely retracted into rotary body.This structure makes user can carry out reverse impactor easily
Assembling, it is thus possible to be stably connected reverse impactor with drill bit more easily.
In one embodiment, sliding end is configured on inserted terminal the arc ennation extended to both sides, is inserting
There is corresponding stopper slot in road near the outer wall side extended configuration of rotary body, sliding tray be configured to annular to adapt to
Shape in arc ennation.Wherein, sliding end can be fully retracted in stopper slot, and the cell wall of stopper slot
Can prevent fastener from continuing to move radially inward.This sliding end is relatively big to the loading end of axial load, thus has
Effect improves the bearing capacity to axial load, and then improves the stability that rotary body is contained in housing, protects
Demonstrate,prove drill bit to be stably connected with reverse impactor.It addition, stopper slot can guarantee that fastener is completely retracted into rotary body
In, and fastener can be propped up by the wall of sliding tray when fastener further inward so that it is motion cannot be continued,
Thus prevent fastener to slip into deeply, and then it is more convenient to make this reverse impactor use.
In one embodiment, rotary body is hollow structure, and slotting road runs through the sidewall of rotary body, reverse impactor
Also including that loading and unloading type is arranged on the block piece of a rotating body, wherein, block piece can block inserts the inner side in road to stop fastener
Slide.Loading the block piece of a rotating body can prevent fastener towards arranging a Slideslip of block piece, thus ensure that rotation
Turn and be effectively maintained in housing.It addition, block piece is dismountable, after block piece is pulled down, can be in its installation position
Putting place and produce space (that is, the hollow position of rotary body), fastener can slide at this space, so that its
Sliding end can be completely retracted into a rotating body.Above-mentioned this set not only ensure that the Stability Analysis of Structures of reverse impactor
Property, it is dismountable for also making reverse impactor, facilitates user and clears up its inside and check.
In one embodiment, block piece is threadeded with rotary body.Screw thread can play guiding function, and this makes to turn round
The assembling turning impacter is convenient.
In one embodiment, the inserted terminal of fastener is configured with the pushing face of inclination with at flights contact.?
When installing block piece, the upper end of block piece contacts with the pushing face of inclination, thus fastener can be produced radial push power,
To be inserted in sliding tray.
In one embodiment, the upper end contacted with fastener at block piece is configured with the guide surface of inclination.Guide surface
For tilt, it is thus possible to produce motive force radially to fastener easily, to be inserted in sliding tray.
In one embodiment, fastener is multiple, when the sliding end of multiple fasteners is retracted into a rotating body just,
Multiple sliding ends can surround a full circle together.Such a construction ensures fastener and the loading end of axial load is entered one
Step increases, and greatly ensure that the stability of clamping, improves the effectiveness of connection.
In one embodiment, corresponding with sliding tray on housing side-walls is configured with through hole.Through hole reduces
Fastener enters resistance during sliding tray, facilitates user and assembles reverse impactor.
In one embodiment, accommodating movable push rod in through hole, it is interior with top that push rod can extend into sliding tray
The sliding end of moved fastener.Push rod can prevent the impurity such as sand setting from entering between rotary body and housing from through hole, thus
Ensure that rotation physical ability smooth rotation.It addition, fastener can also be ejected sliding tray by push rod, make rotation physical ability smooth
It is removed.
Compared with prior art, it is an advantage of the current invention that: (1) this connected mode is the most stable, can protect
Card reverse impactor keeps Stability Analysis of Structures in operation process, is hardly damaged, thus ensure that reverse impactor
Integrity, reverse impactor and coupled drill bit will not be lost in well, and then ensure that drillng operation energy
It is smoothed out.(2) fastener is integrated, simple in construction, and intensity is higher, it is thus possible to effectively carrying drilling well is produced
Raw vibration and load, it is ensured that being smoothed out of drillng operation.
Accompanying drawing explanation
Hereinafter based on embodiment reference accompanying drawing, the present invention will be described in more detail.Wherein:
Fig. 1 shows the axial cross-sectional views of the reverse impactor of the present invention.
Fig. 2 shows the partial structurtes schematic diagram of the reverse impactor of the present invention.
Fig. 3 shows the cross sectional representation of the reverse impactor of the present invention.
Fig. 4 shows the structural representation of the fastener of the present invention.
In the accompanying drawings, identical parts use identical reference.Accompanying drawing is not drawn according to actual ratio.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
Here it should be understood that axial, circumferential and radial direction here is all with whole reverse impactor as reference, example
As, it is axially the direction of the axis along reverse impactor.
Fig. 1 show schematically show the structure of the reverse impactor 100 of the present invention.Reverse impactor 100 includes
Housing 10 and rotary body 20.The housing 10 that rotary body 20 is arranged on hollow is internal, and is connected with drill bit 200.
Preferably, rotary body 20 is connected by helicitic texture with drill bit 200, connects simple, stable.Turn at drill bit
Time dynamic, rotary body together along the axial rotation of reverse impactor, and can remain contained within housing 10 with drill bit
In.In order to ensure that when drill bit 200 works rotary body 20 can be stably maintained in housing 10, at rotary body
Extend internally in the axial side wall of 20 and be provided with slotting road 21, in Bing Cha road 21, be provided with fastener 30.At housing
Corresponding sliding tray 12 it is provided with on 10 inner circumferential medial walls.One end of fastener 30 remains contained within slotting road 21
In, this end is inserted terminal 32, and the other end is extensible to enter in sliding tray 12, and this end is sliding end
31.Insert road 21 being radially arranged along rotary body 20.So, in axial movable along housing 10 of rotary body 20
Or when having along the trend of the axially activity of housing 10, the sliding end 31 of fastener 30 can be stuck in sliding tray 12
In, thus prevent rotary body 20 and housing 10 further relative motion in axial direction, the most just can make
In the rotary body 20 being connected with drill bit 200 is maintained at housing 10 and together rotate with drill bit 200.Sliding end energy
In sliding tray, and be preferably annular sliding tray in relative to housing around axis low-angle reciprocating rotation, and then
Circumferential reciprocal pulse can be provided to drill bit.
The simple in construction of this reverse impactor, stability is high, is hardly damaged, it is thus possible to effectively prevent from reversing punching
Hit device and drill bit is lost in well.It addition, the reverse impactor of steady operation is hardly damaged, improves down-hole and make
The safety of industry.Therefore, use above-mentioned this reverse impactor can guarantee that drillng operation and ensuing further
Underground work all can be smoothed out.
Preferably, seal with slotting road 21 at inserted terminal 32, such as can as shown in Figure 4, at inserted terminal
It is configured to accommodate the annular groove of sealing member 33 on 32.As shown in Figure 2 fastener 30 is being assembled to
Time in rotary body 20, sheathed sealing member 33 on annular groove, make inserted terminal 32 seal with slotting road 21.Close
The connection of envelope formula makes the sand grains in the external world, impurity etc. cannot be introduced into, it is ensured that clean within device, makes torsion
Impacter 100 operationally will not be affected by impurity, and then it is smooth and steady to ensure that drill bit 200 works
Fixed.
As shown in Figure 2, it is also possible to spacing near the side of the outer wall of rotary body 20 structure in slotting road 21
Groove 22, the cross section of stopper slot 22 is more than the cross section of slotting road 21 other end, and its shape to be adapted to sliding end
The shape of 31 is to ensure that fastener 30 can be completely retracted in rotary body 20.Meanwhile, fastener 30 also can construct
There are corresponding outer lug, the most preferably the most directly sectional dimension the cutting more than inserted terminal 32 of the sliding end 31 of order
Face size.The length in sliding direction, Duan31Yan Cha road 21 is less than or equal to, and preferably less than stopper slot 22
Along the degree of depth inserting direction, road 21.Slide in fastener 30 Neng Cha road 21, until sliding end 31 is completely retracted into
The inside of rotary body 20.Now, the motion to axial between rotary body 20 and housing 10 is not stopped,
Rotary body 20 and fastener 30 all can be removed.This set makes reverse impactor 100 as removable
Unload, thus facilitate user and its inside is maintained, cleared up.Here it should be understood that bullet can be passed through
Fastener 30 is connected to a rotating body by the connectors such as spring, and this also ensures that fastener 30 can reach rotary body simultaneously
Outside, and a rotating body can be fully retracted to.
In a preferred embodiment, in order to ensure fastener 30 can when rotary body 20 rotates relatively stable
It is maintained in sliding tray 12, rotary body 20 can be configured to hollow, wherein as shown in Figure 3
Block piece 40 can be set.The mode that block piece 40 can be threaded connection is connected with rotary body 20.Screwing in block piece
When 40, it can contact with the fastener 30 in slotting road 21 so that it is cannot bounce back, so that sliding end 31
Can be stably maintained in sliding tray 12.When needs dismounting reverse impactor, can first block piece 40 be taken out,
Now can produce confession fastener 30 and retract to the space in rotary body 20, make sliding end 31 be fully retracted, to incite somebody to action
Rotary body takes out.Now due to the setting of stopper slot 22, moreover it is possible to prevent fastener 30 from retracting too much so that its therefrom
Drop out in empty rotary body 20.The most preferably make fastener 30 along the thickness in direction, slotting road 21 more than inserting road 21
Thickness, thus when block piece 40 screw in after, fastener 30 can effectively be stuck between shell and rotary body 20, and
After taking out block piece 40, a part for fastener 30 can extend into the position arranging block piece 40, makes fastener 30 energy
All it is recovered in rotary body 20.This structure is more stable, it is thus possible to make reverse impactor stable with drill bit
Connect, and then the reliability of reverse impactor can be effectively improved.
Sliding end 31 can in sliding tray 12 circumferentially.Preferably, as shown in Figure 4, sliding
End 31 is configured to arc ennation, so that the surface of the axial load born between rotary body 20 and housing 10
Increase, thus improve the strength and stability of reverse impactor 100, it is ensured that drill bit 200 energy and reverse impactor
100 effectively connect.Sliding tray 12 is configured to ring-type, to accommodate arc ennation, and ensures rotary body 20
With the fastener 30 relative housing 10 of energy around axis low-angle reciprocating rotation, and then provide week yearning can to drill bit 200
Multiple pulse.
Arc ennation mentioned here as shown in Figure 4, is substantially as a part for pipe sidewall
Shape.
As shown in Figure 2, guide surface, guide surface and fastener can also be constructed at the screw terminal of block piece 40
Fastener 30 can be produced along the power inserting direction, road 21, so that fastener 30 can insert more easily by 30 contacts
In sliding tray 12.Also can arrange pushing face 321 on the inserted terminal 32 of fastener 30, pushing face 321 is arranged
For contacting with block piece 40, this can facilitate equally and is pushed in sliding tray 12 by fastener 3.Preferably, card
Part 30 can be configured to as shown in Figure 4, and the end of its inserted terminal 32 is the most wedge shaped, with further
Convenient use.The end of wedge shape can be configured with, with block piece 40 contact position, the curved profile adapted with block piece 40,
So can be effectively improved the contact area of itself and block piece 40, it is ensured that its intensity, improve reverse impactor 100
Stability.
Here it should be understood that screw terminal refers to the upper end of block piece 40 as shown in Figure 2, it is assembling gear
The one end in rotary body 20 is preferentially entered during part 40.
In a preferred embodiment, reverse impactor is provided with multiple fastener 30, and multiple fasteners are uniformly distributed
And uniformly and stably bear axial load.Such as, 4 fasteners 30 can be set as shown in Figure 3, sliding
The sector connecing end 31 is 90 °, and when 4 fasteners 30 are retracted in rotary body 20 the most just, sliding
Connect end 31 contact with each other and a full circle can be formed together.This setting makes fastener 30 carry axial load
Face maximizes, and greatly ensure that rotary body 20 is stably held in housing 10, thus greatly ensure that brill
Tool is stably connected with whole reverse impactor 100.
Also can arrange through hole radially on the sidewall of housing 10 as shown in Figure 3, through hole is arranged on
On the sidewall of sliding tray 12, and can be relative with fastener 30, preferably when inserting fastener 30 with fastener 30
Inserted terminal 32 is relative, with the handling of convenient fastener 30.Housing 10 is internal is sealing, will block
During part 30 pushes housing 10 to, it is ensured that the air energy via through holes of sliding end 31 side of fastener 30 has
Effect is discharged to outside housing 10, thus ensure that sliding end 31 can extend in sliding tray 12 smoothly.
It addition, in order to prevent in drilling process, through hole has impurity and enters, and is provided with and can fill in through hole
Unloading formula push rod, push rod is preferably pin.Push rod can seal through hole, to prevent the granules such as sand setting from entering into housing 10
And in the gap between rotary body 20, thus ensure that rotary body 20 effectively can rotate relative to housing 10.
And when assembling, in order to ensure that air can be discharged to ensure the sliding tray that fastener enters into housing smoothly by through hole
In, push rod can be taken out.
It addition, push rod is set to movable push rod, receiving intracavity can be protruded into and push fastener 30, thus
Easily fastener 30 can be pushed to return to completely rotary body 20 internal, make rotation physical ability take out in housing 10.
Drill bit 200 can effectively be connected with reverse impactor 100, and can be when need not drill bit 200 and working, phase
Disassemble mutually, thus be more convenient for drill bit 200 and the transport of reverse impactor 100, the most convenient
To drill bit 200 and the long-distance transport of reverse impactor 100, significantly reduce transport burden, decrease fortune
Defeated cost.Further, since reverse impactor 100 and drill bit 200 are conducive to transport.The structure of drill bit 200 is
Well known to the skilled artisan in the art, it is not added with at this repeating.
The step of the reverse impactor 100 of the application is as follows:
(1) fastener 30 is inserted into slideway from the outside of rotary body 20；
(2) rotary body 20 that will be equipped with fastener 30 is inserted in housing 10；
(3) block piece 40 is screwed in rotary body 20, makes fastener 30 enter in sliding tray 12, and prevent
Only fastener 30 bounces back；
(4) push rod is inserted in through hole so that it is seal.
Use above-mentioned reverse impactor 100, it is possible to guarantee reverse impactor 100 is stablized with drill bit 200 and can be anti-
Reassemble and connect with unloading, convenient transport, significantly reduce cost of transportation and operating cost.
Although by reference to preferred embodiment, invention has been described, but without departing from the scope of the present invention
In the case of, it can be carried out various improvement and parts therein can be replaced with equivalent.Especially, only
Otherwise there is structural hazard, the every technical characteristic being previously mentioned in each embodiment all can combine in any way
Come.The invention is not limited in specific embodiment disclosed herein, but include falling within the scope of the appended claims
All technical schemes.
Claims (10)
1. a reverse impactor, including:
Housing, is configured with sliding tray in the inner circumferential wall of described housing；
The rotary body being arranged in housing, described rotary body is connected with drill bit；And
The fastener that rotary body and housing are kept together, in described fastener includes being contained in described sliding tray and with
The sliding end that sliding tray slidingtype coordinates；
Wherein, in use, in fastener can make the rotary body being connected with drill bit be maintained at housing and drilling well can be born
The vibration produced and load.
Reverse impactor the most according to claim 1, it is characterised in that in the circumference of described rotary body
Extending radially inwardly on side and be provided with slotting road, described fastener also includes the inserted terminal being connected with sliding end, described
Inserted terminal is contained in slotting road,
Wherein, described fastener Neng Yancha road slides within described sliding end is completely retracted into rotary body.
Reverse impactor the most according to claim 2, it is characterised in that described sliding end is configured to
The arc ennation extended to both sides on inserted terminal, in described slotting road near the outer wall side extended configuration of rotary body
Corresponding stopper slot, described sliding tray is had to be configured to the shape to be adapted to arc ennation of annular,
Wherein, described sliding end can be fully retracted in stopper slot, and the cell wall of described stopper slot can prevent institute
State fastener to continue to move radially inward.
4. according to the reverse impactor described in Claims 2 or 3, it is characterised in that during described rotary body is
Hollow structure, described slotting road runs through the sidewall of rotary body, and described reverse impactor also includes that loading and unloading type is arranged on rotation
Internal block piece,
Wherein, described block piece can block the inner side in described slotting road to stop fastener to slide.
Reverse impactor the most according to claim 4, it is characterised in that described block piece and rotary body spiral shell
Stricture of vagina connects.
6. according to the reverse impactor described in claim 4 or 5, it is characterised in that inserting at described fastener
Connect end and above and be configured with the pushing face of inclination at flights contact.
7. according to the reverse impactor according to any one of claim 4 to 6, it is characterised in that at block piece
The upper end contacted with described fastener is configured with the guide surface of inclination.
8. according to arbitrary described reverse impactor in claim 1 to 7, it is characterised in that described card
Part is multiple, and when the sliding end of multiple fasteners is retracted into a rotating body just, multiple sliding ends can surround together
One full circle.
9. according to the reverse impactor according to any one of claim 1 to 8, it is characterised in that described
Side-walls corresponding with sliding tray on housing is configured with through hole.
Reverse impactor the most according to claim 9, it is characterised in that accommodate in described through hole
Movable push rod, it is interior to push the sliding end of described fastener that described push rod can extend into sliding tray.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510164300.8A CN106150347B (en) | 2015-04-09 | 2015-04-09 | Reverse impactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510164300.8A CN106150347B (en) | 2015-04-09 | 2015-04-09 | Reverse impactor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106150347A true CN106150347A (en) | 2016-11-23 |
| CN106150347B CN106150347B (en) | 2018-03-30 |
Family
ID=57335715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510164300.8A Active CN106150347B (en) | 2015-04-09 | 2015-04-09 | Reverse impactor |
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| Country | Link |
|---|---|
| CN (1) | CN106150347B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108692903A (en) * | 2018-05-16 | 2018-10-23 | 长江大学 | For micro- experimental provision for boring experiment to micro- PDC drill bit application torsional pulse |
| CN117307017A (en) * | 2023-11-29 | 2023-12-29 | 中石化西南石油工程有限公司 | Built-in drill bit type hydraulic impactor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020166700A1 (en) * | 2001-05-11 | 2002-11-14 | Gillis Peter J. | Rotational impact drill assembly |
| CN101463709A (en) * | 2009-01-08 | 2009-06-24 | 西南石油大学 | Torsional impact drilling tool |
| CN101967952A (en) * | 2010-10-26 | 2011-02-09 | 西南石油大学 | Fall prevention device for torsional impacter |
| CN102454364A (en) * | 2010-10-19 | 2012-05-16 | 中国石油化工集团公司 | Torsional impact drilling tool |
-
2015
- 2015-04-09 CN CN201510164300.8A patent/CN106150347B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020166700A1 (en) * | 2001-05-11 | 2002-11-14 | Gillis Peter J. | Rotational impact drill assembly |
| CN101463709A (en) * | 2009-01-08 | 2009-06-24 | 西南石油大学 | Torsional impact drilling tool |
| CN102454364A (en) * | 2010-10-19 | 2012-05-16 | 中国石油化工集团公司 | Torsional impact drilling tool |
| CN101967952A (en) * | 2010-10-26 | 2011-02-09 | 西南石油大学 | Fall prevention device for torsional impacter |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108692903A (en) * | 2018-05-16 | 2018-10-23 | 长江大学 | For micro- experimental provision for boring experiment to micro- PDC drill bit application torsional pulse |
| CN108692903B (en) * | 2018-05-16 | 2020-10-02 | 长江大学 | Experimental device for applying torsional impact to micro PDC drill bit in micro-drilling experiment |
| CN117307017A (en) * | 2023-11-29 | 2023-12-29 | 中石化西南石油工程有限公司 | Built-in drill bit type hydraulic impactor |
| CN117307017B (en) * | 2023-11-29 | 2024-03-29 | 中石化西南石油工程有限公司 | Built-in drill bit type hydraulic impactor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106150347B (en) | 2018-03-30 |
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