CN209444304U - Casing section mill - Google Patents
Casing section mill Download PDFInfo
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- CN209444304U CN209444304U CN201822204598.2U CN201822204598U CN209444304U CN 209444304 U CN209444304 U CN 209444304U CN 201822204598 U CN201822204598 U CN 201822204598U CN 209444304 U CN209444304 U CN 209444304U
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- weighted lever
- casing section
- fish
- cylindrical tube
- rod
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Abstract
The utility model relates to a kind of casing section mills, retainer ring is fixedly installed inside the cylindrical tube of the casing section mill, and the weighted lever that lower end is connected with pressing plate is inserted into the central through hole of retainer ring, the major diameter section box cupling of weighted lever upper end is hung on retainer ring, under the action of retainer ring, weighted lever enters well with casing section mill lower section, and when encountering fish, the pressing plate that weighted lever will make its lower end connect carries out pressurization anchoring to fish, to guarantee to cover milling head when rotating milling fish, fish will not rotate synchronously with casing section mill tool, effectively improve milling efficiency.
Description
Technical field
The utility model belongs to oil-gas field development application underground work workover tool field, and in particular to a kind of casing section mill.
Background technique
In the construction of oilfield water well operation, meeting in well has irregular movable fish (the disconnected drill bit etc. for falling in underground
Other tool parts) when needing to handle, generallys use casing section mill to carry out milling to movable fish, become fragment, with solution
Influence except fish to normal drilling operation.And in actual job, since movable fish can be certainly in casing local space
By activity, in this way, casing section mill is when carrying out milling to movable fish, casing section mill is easily rotated synchronously with fish, so that
Casing section mill can not carry out quickly and efficiently milling to fish, and milling inefficiency is unable to satisfy well workover construction needs.
Such as Authorization Notice No. of casing section mill in the prior art is that the Chinese utility model patent of " CN205154080U " is public
" the interior scraper casing section mill " opened, the casing section mill are to carry out preliminary milling to the cement plug in well by the set milling head on casing section mill,
The cement plug by the set preliminary milling of milling head is carried out by scraper in casing section mill, being rotated synchronously with casing section mill simultaneously secondary
Cutting is broken.But the casing section mill in the utility model patent, when carrying out milling by set milling head, there are still casing section mills and water
It is easily rotated synchronously between the bod, the problem of milling low efficiency.Also, Authorization Notice No. is in " 207568529 U of CN "
In " set milling fishing tool " disclosed in state's utility model patent, synchronous turn also easily occurs between casing section mill and fish in milling
It is dynamic, reduce milling efficiency.
Utility model content
It can be avoided the technical problem to be solved by the present invention is to provide one kind and occur between casing section mill and movable fish
Relatively rotate and influence the casing section mill of milling efficiency.
To solve the above-mentioned problems, in the utility model casing section mill technical solution are as follows:
Casing section mill, including cylindrical tube, the cylindrical tube upper end have for being attached with running string
Joint structure, the integrally molded set milling head for having cemented carbide material on lower end surface, the set milling head with cylindrical tube rotation
It transfers and milling is carried out to the movable fish in well, the supporting parts that middle part has central through hole are provided in the cylindrical tube body,
The supporting parts are fixed in cylindrical tube body by fixed structure, and the casing section mill further includes weighted lever, are had on the weighted lever
There is outer diameter to hang on when being greater than supporting parts central through hole diameter, central through hole for being plugged in the supporting parts in weighted lever
Stop part on supporting parts, weighted lever lower end is provided with for pressing the top-pressure part for being anchored on activity fish top, and is aggravated
When bar is hung on supporting parts by stop part, the top-pressure part of weighted lever stretches out end face where set milling head.
The utility model has the advantages that positioning by support of the supporting parts inside cylindrical tube to weighted lever, it is effectively prevented from exacerbation
Bar is fallen in well accidentally during going into the well, and will realize that the weighted lever " guidance " of press anchoring enters cylinder to fish
In cylinder, weighted lever is enable to go into the well together with casing section mill, and anchoring of bearing down on one can be played to fish at fish position
Effect, casing section mill is not rotated synchronously with fish when ensure that set milling, to improve brill milling efficiency.
Further, the supporting parts are retainer ring, and the cylindrical tube middle and lower part offers fixation hole, fixing bolt
The retainer ring is fixed in cylindrical tube body by the fixation hole, the fixation hole and fixing bolt constitute the fixed knot
Structure.
The utility model has the advantages that can be by the way that fixing bolt be directly passed through fixation hole outside cylindrical tube, and by retainer ring
It is tightened to inside cylindrical tube, the fixation of retainer ring can be directly realized outside cylindrical tube, so that fixed behaviour
Make more convenient, and it is also more preferable that fixed effect achieved is fixed in such a way that bolt is tightened.
Further, the weighted lever has the multistage body of rod, and the body of rod in bottom of weighted lever is the first order body of rod, institute
Stating first order body of rod upper end has major diameter section, has box cupling structure in the major diameter section, and stop part is the major diameter section of the first order body of rod
On box cupling structure, the body of rod upper ends at different levels in the multistage body of rod all have the box cupling structure, which has for connecting
Connect the thread matching structure of the multistage weighted lever bodies of rod at different levels.
The utility model has the advantages that the upper box cupling by weighted lever upper end can more easily be threadedly coupled multistage weighted lever, thus
The depth that can satisfy different fish requires and the requirement of required pressure on top surface, improves the suitable of entire casing section mill tool
The property used.
Further, weighted lever lower end setting for press be anchored on the top-pressure part of activity fish top for
The pressing plate of weighted lever split settings, the lower end surface that the pressing plate is in contact with fish be embedded with alternate setting hard alloy columnar or
Hard alloy blocks and form wear-resisting rough surface, which is connected and fixed or is welded and fixed with weighted lever lower thread.
The utility model has the advantages that the pressure plate structure that the end face being in contact with fish is wear-resisting rough surface is fixedly connected under weighted lever
End enables to weighted lever to be anchored more firm stabilization to the press of fish, to guarantee the stability of milling process.
Detailed description of the invention
Fig. 1 is the casing section mill structure sectional view in the utility model embodiment 1；
Fig. 2 is cross-sectional view at A-A in Fig. 1；
Figure label are as follows: top connection 1, cylindrical tube 2, retainer ring 3, fixing bolt 4, weighted lever 5, the first order body of rod
51, the second level body of rod 52, pressing plate 6, set milling head 7, box cupling 8.
Specific embodiment
The utility model is described in more detail with reference to the accompanying drawing.
The embodiment 1 of casing section mill is as shown in Figs. 1-2: including cylindrical tube 2, set milling head 7, retainer ring 3, weighted lever 5, pressure
Plate 6, which is made of cemented carbide material, and is welded on the lower end surface of cylindrical tube 2.Cylindrical tube 2 is logical
It crosses the top connection 1 of the upper end and running string is fixedly connected and rotates and transfers in operation oil well, encountering falling in well
When fish, 2 lower end surface of cylindrical tube welding set milling head 7 will be with cylindrical tube 2 rotation transfer and to fish into
Row milling is smashed, to avoid fish to the obstruction normally crept into.
There is retainer ring 3 in 2 inner cavity of cylindrical tube of the utility model, which is located at cylindrical tube 2
Middle and lower part offers fixation hole in the position where the middle and lower part of cylindrical tube 2, retainer ring 3, and fixing bolt is fixed with this
Hole complements each other to form fixed structure, and retainer ring 3 is horizontally fixed in cylindrical tube 2 by the fixed structure.The support
Weighted lever 5 is fitted in the inner hole of ring 3, weighted lever 5 can be freely rotated in retainer ring 3, there is stop part on the weighted lever 5,
The outer diameter of the stop part is greater than the internal diameter of retainer ring 3, so that the weighted lever 5 when 5 activity of weighted lever installs in retainer ring 3
Stop part can cooperate with 3 block of retainer ring, so that weighted lever 5 is hung on retainer ring 3.In the present embodiment, it aggravates
Bar 5 is the multistage weighted lever being made of the multistage body of rod, and the body of rod in bottom of weighted lever 5 is the first order body of rod, the first order
51 upper end of the body of rod is also connected with the second level body of rod 52, and second level body of rod upper end is also connected with the third level body of rod ..., and so on,
What body of rod, which is specifically arranged, to be adaptively adjusted according to actual condition.The stop part is located at 5 bottom of weighted lever
51 upper end of the first order body of rod, the stop part on the first order body of rod 51 of 5 bottom of weighted lever is the biggish box cupling 8 of outer diameter, should
8 upper end aperture of box cupling simultaneously has internal thread structure, can be threadedly coupled by box cupling 8 to realize between the second level body of rod 52,
Also, when there is two-stage with upper body of rod, the upper end of the bodies of rod at different levels is also provided with box cupling 8, and multistage aggravate has been realized so as to since
The connection that is screwed between the bar bodies of rod at different levels.The lower end of weighted lever 5 is provided with made of cemented carbide material, lower end surface is
The pressing plate 6 of wear-resisting rough surface, the structure of the wear-resisting rough surface is identical as the grinding surface structure of junk mill in the prior art, i.e., this is wear-resisting
Rough surface is formed by the alternate hard alloy columnar being embedded on 6 lower end surface of pressing plate or hard alloy blocks.Under pressing plate 6 and weighted lever 5
End is fixedly connected by helicitic texture, can also be by the way of directly welding.Also, cylinder is hung in weighted lever 5
When on the retainer ring 3 of shape cylinder 2, the set milling head of connected extended 2 lower end surface of cylindrical tube of pressing plate 6 in 5 lower end of weighted lever
7。
The embodiment 1 of above-mentioned casing section mill is during oil gas water well well workover in use, passing through top connection 1 for casing section mill tool
Be mounted on the bottom for oil pipe of going into the well and be put into well down together, estimated casing section mill tool lower end arrival activity fish top with
When upper 2m or so, fish surface will affect the impurity such as cement, the stone of set milling head milling operation and rushes by turn on pump circulation flushing fish
Fall, then proceed to transfer and rotate the tubing string that go into the well oil pipe and casing section mill collectively form, transferred as tubing string rotates, beyond set milling
The pressing plate 6 of cylinder lower end surface will not rotate, and the pressing plate will carry out pressurization anchoring to fish, so as to guarantee casing section mill
For the set milling head 7 of lower end when carrying out rotation milling to fish, fish will not eliminate set milling head 7 with casing section mill synchronous rotary
" bearing effect " between fish can guarantee that covering milling head 7 has the milling of more strength to act on fish, and then improve mill
Mill efficiency.
The casing section mill tool of the utility model passes through the clip 8 of the upper end successively screw thread when in use, by multistage weighted lever 5
It connects, and is lowered into cylindrical tube 2, whole series weighted levers 5 of connection are hung on retainer ring 3, are held
Filler ring 3 fixes the position of weighted lever 5 in the up-down direction by the support to weighted lever 5, realization, can be effectively prevented from and add
Weight bar 5 is fallen in well accidentally during going into the well.The retainer ring 3 is first passed through to the positioning of the support of weighted lever 5, will be used to falling
Fish realizes that the weighted lever 5 " guidance " with pressing plate 6 of press anchoring enters in cylindrical tube body, enables multistage weighted lever 5
It can play the role of anchoring of bearing down on one to fish as casing section mill is gone into the well together, and at fish position.
Also, the upper box cupling 8 of 5 upper end of weighted lever in the utility model can more easily increase the grade of weighted lever
Number, so as to add multistage weighted lever by box cupling 8 on weighted lever, to meet depth requirement and the institute of different fish
The requirement of the press anchorage force needed, can satisfy more actual requirement of engineering, improves the applicability of entire casing section mill tool.
In other embodiments, supporting parts can also be not provided with into support ring structure, can also be that middle part is logical with center
Hole, guarantee the central through hole internal diameter be less than weighted lever on box cupling 8 outer diameter, and weighted lever 5 inserting into the central through hole after
The bulk or tubular structure that can be freely rotated.Stop part on weighted lever 5 can not be box cupling 8 on weighted lever, in weighted lever 5
Outer diameter on fixation be arranged or process boss structure, boss structure block is suspended on retainer ring.
In addition to fixation hole is arranged on the cylindrical tube of casing section mill in the present embodiment, and pass through fixing bolt for support
Ring is fixed in the cylindrical tube body of casing section mill, retainer ring can also be weldingly fixed on cylinder by the way of directly welding
In shape cylinder.In other embodiments, weighted lever lower end can also be not provided with the pressing plate 6 for pressing anchoring activity fish,
Press anchoring directly can be carried out to movable fish by weighted lever itself lower end.
Claims (4)
1. casing section mill, including cylindrical tube, the cylindrical tube upper end have for running string be attached on connect
Header structure, the integrally molded set milling head for having cemented carbide material on lower end surface, the set milling head with cylindrical tube rotation
To carry out milling to the movable fish in well, it is characterised in that: being provided with middle part in the cylindrical tube body has central through hole
Supporting parts, the supporting parts are fixed in cylindrical tube body by fixed structure, and the casing section mill further includes weighted lever, should plus
It is greater than supporting parts central through hole diameter, central through hole for being plugged in the supporting parts in weighted lever with outer diameter on weight bar
When hang on the stop part on supporting parts, weighted lever lower end is provided with for pressing the press for being anchored on activity fish top
Part, and when weighted lever is hung on supporting parts by stop part, the top-pressure part of weighted lever stretches out end face where set milling head.
2. casing section mill according to claim 1, it is characterised in that: the supporting parts are retainer ring, the cylindrical tube
Middle and lower part offers fixation hole, and the retainer ring is fixed in cylindrical tube body by fixing bolt by the fixation hole, this is fixed
Hole and fixing bolt constitute the fixed structure.
3. casing section mill according to claim 1, it is characterised in that: the weighted lever has the multistage body of rod, and weighted lever is in
The body of rod of bottom is the first order body of rod, and first order body of rod upper end has major diameter section, has box cupling structure in the major diameter section,
Stop part is the box cupling structure in the major diameter section of the first order body of rod, and the body of rod upper ends at different levels in the multistage body of rod all have the box cupling
Structure, the box cupling structure have the thread matching structure for connecting the multistage weighted lever bodies of rod at different levels.
4. casing section mill according to claim 1-3, it is characterised in that: the weighted lever lower end setting is used for
Pressing and being anchored on the top-pressure part of activity fish top is the pressing plate with weighted lever split settings, what the pressing plate was in contact with fish
Lower end surface be embedded with alternate setting hard alloy columnar or hard alloy blocks and form wear-resisting rough surface, under the pressing plate and weighted lever
End is threadedly coupled fixed or is welded and fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822204598.2U CN209444304U (en) | 2018-12-26 | 2018-12-26 | Casing section mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822204598.2U CN209444304U (en) | 2018-12-26 | 2018-12-26 | Casing section mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209444304U true CN209444304U (en) | 2019-09-27 |
Family
ID=68015663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822204598.2U Active CN209444304U (en) | 2018-12-26 | 2018-12-26 | Casing section mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209444304U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115199227A (en) * | 2021-04-09 | 2022-10-18 | 中国石油天然气股份有限公司 | Sleeve milling tool |
-
2018
- 2018-12-26 CN CN201822204598.2U patent/CN209444304U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115199227A (en) * | 2021-04-09 | 2022-10-18 | 中国石油天然气股份有限公司 | Sleeve milling tool |
| CN115199227B (en) * | 2021-04-09 | 2024-05-28 | 中国石油天然气股份有限公司 | Milling tool |
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