CN207944901U - A kind of section milling tool of band self-regulation centralizer - Google Patents
A kind of section milling tool of band self-regulation centralizer Download PDFInfo
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- CN207944901U CN207944901U CN201721882703.7U CN201721882703U CN207944901U CN 207944901 U CN207944901 U CN 207944901U CN 201721882703 U CN201721882703 U CN 201721882703U CN 207944901 U CN207944901 U CN 207944901U
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- section milling
- milling tool
- wiper block
- cutting blade
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Abstract
A kind of section milling tool of band self-regulation centralizer, including upper body, cutting blade and upper piston；The upper body lower part is extended with lower body, and lower body barrel is equipped with more than two wiper block slots being spaced apart, and wiper block is connected to by wiper block locating piece, wiper block axis pin in wiper block slot；Lower piston is set in lower body, lower piston top is slidingly sealed cooperation with lower body upper inside wall composition, lower piston lower part is equipped with the convex block to slide axially with wiper block, radial support coordinates, spring cavity is equipped between lower piston and lower body, lower piston spring is arranged in spring cavity and forms axial support to lower piston.The utility model has the advantage of：Section milling tool is not limited in lower brill by casing section milling top small-bore tubing column, increases the application range of section milling tool；On the other hand, the centralizer for the outer diameter that can be self-regulated is increased, the job stability of section milling tool greatly improves, and improves a section milling efficiency, and operation timeliness is improved significantly.
Description
Technical field
The utility model belongs to oil drilling tool field, specifically a kind of to pass through automatic adjustment righting in section milling
The section milling tool of device can be used for the section milling of different wall thickness casing.
Background technology
The outer diameter of traditional section milling tool is slightly less than the internal diameter of casing and carries a set of fixed-size centralizer, lightening section
Radial vibration when milling improves the stability and working efficiency of section milling.Since the outer diameter of section milling tool is slightly less than in casing
Diameter, therefore it can not be by positioned at the small-bore tubing column for waiting for casing section milling top（The emergent tail pipe in seabed used such as marine drilling
Deng）.Outer diameter by reducing section milling tool can solve the problems, such as tool tripping in, but can reduce the operation is stable of section milling tool
Property and section milling efficiency, cause to make a trip number raising, and the activity duration increases, and operating cost improves.
Invention content
Purpose of the utility model is to solve the tripping in of section milling tool and improve section milling tool job stability and section milling
The problem of efficiency, provides a kind of section milling tool of band self-regulation centralizer, can be by the tubing string of small internal diameter, and improves section miller
The stability and section milling efficiency for having work, reduce the activity duration, reduce cost.
To achieve the above object, the utility model uses following technical scheme：
A kind of section milling tool of band self-regulation centralizer, including upper body, cutting blade and upper piston；Wherein, upper body
More than two cutter film traps are equipped at intervals on barrel, cutting blade is by setting cutting blade locating piece, cutting blade axis pin company
Be connected in cutter film trap, upper piston top and upper body upper inside wall composition are slidingly sealed cooperation, upper piston lower part equipped with
The convex block that cutting blade slides axially, radial support coordinates, is equipped with spring cavity between upper piston and upper body, upper piston spring is set
It sets in spring cavity and axial support is formed to upper piston；The upper body lower part is extended with lower body, is set on lower body barrel
There are two the wiper block slot being spaced apart above, wiper block is connected to wiper block slot by wiper block locating piece, wiper block axis pin
It is interior；Lower piston is set in lower body, and lower piston top is slidingly sealed cooperation, lower piston lower part with lower body upper inside wall composition
Equipped with the convex block to slide axially with wiper block, radial support coordinates, spring cavity, lower piston bullet are equipped between lower piston and lower body
Spring is arranged in spring cavity and forms axial support to lower piston.
Said program further comprises：
The upper piston lower part extends to lower piston, and slides axially with lower piston inner wall composition and seal cooperation.
Piston nozzle sealing ring, piston nozzle are respectively equipped on the upper piston and lower piston.
It is equipped between the upper piston and upper body, between lower piston and lower body, between lower piston and upper piston close
Sealing.
Upper body is the separate structure being threadedly coupled with lower body, and the upper end of upper body and the lower end of lower body are respectively equipped with
Nipple.
The utility model is devised in section milling tool lower part outside a set of self-regulation to reduce the outer diameter of section milling tool
For diameter to adapt to the centralizer of different wall thickness casing inner diameter, which is by integral with the processing of section milling tool
What outer formula wiper block was realized.Wiper block itself does not have the ability of Casing-Cutting, it can be in drilling fluid without cutting edge
The front opening of milling casing is opened and starts in section milling block under the driving of pressure difference, and by maintaining segment milling tool in casing section milling
It is placed in the middle to mitigate the radial vibration during tool work, improve section milling tool stability and section milling efficiency.
The utility model has the advantage of：Section milling tool is not limited in lower brill by casing section milling top small-bore tubing column
System, increases the application range of section milling tool；On the other hand, the centralizer for the outer diameter that can be self-regulated, section milling tool are increased
Job stability greatly improve, improve a section milling efficiency, operation timeliness is improved significantly.
Description of the drawings
Fig. 1 is a kind of schematic diagram of the section milling tool of band self-regulation centralizer of the utility model.
Fig. 2 is the state diagram of tool when wiper block stretches out but cutting blade does not extend out.
Fig. 3 is the state diagram of tool when wiper block and cutting blade have stretched out.
Specific implementation mode
The utility model is described in further detail with reference to the accompanying drawings and detailed description：
As shown in Figure 1, a kind of section milling tool of band self-regulation centralizer, including：Upper body 1, upper piston sealed nozzle circle
2, upper piston nozzle 3, upper piston seal circle 4, upper piston 5, upper piston spring 6, cutting blade locating piece 7, cutting blade positioning
Block bolt 8, cutting blade axis pin 9, cutting blade 10, lower body 11, upper and lower piston space sealing ring 12, lower piston 13, lower piston
Sealed nozzle circle 14, lower piston sealing ring 15, lower piston nozzle 16, lower piston spring 17, wiper block locating piece 18, wiper block are fixed
Position block bolt 19, wiper block axis pin 20, wiper block 21.
In conjunction with shown in Fig. 2, the cutting blade 10 by cutting blade locating piece 7, cutting blade locating piece bolt 8 and
Cutting blade axis pin 9 is fixed in upper body 1.5 outside of upper piston is equipped with upper piston seal circle 4, and inside is equipped with upper piston nozzle
3, the back contact of lower part and cutting blade 10, in not turn on pump, thrust and cutting blade of the upper piston 5 by upper piston spring 6
10 cooperation just makes cutting blade 10 not stretch out upper body 1.Lower piston 13 is sealed by the piston space up and down on hydrophthalmia top
Circle 12 is sealed with upper piston 5.Push lower piston 13 downward for generating pressure drop equipped with lower piston nozzle 16 inside lower piston hydrophthalmia
Movement.Wiper block 21 is fixed on lower by wiper block locating piece 18, wiper block locating piece bolt 19 and wiper block axis pin 20
On body 11, lower piston spring 17 pushes 13 uplink of lower piston when no drilling fluid flows through so that wiper block 21 is in not turn on pump shape
Lower body 11 is not pushed out under state.Lower body 11 is connect by screw thread with upper body 1, first by the lower piston in lower body when assembly
13 equal accessories assemble, then lower body 11 is connect with upper body 1, then reassemble upper piston 5, the upper piston in upper body 1
The accessories such as spring 6.
When in use, lower end connects special guide shoe for destroying the iron that section milling tool lower part is generated in section milling process to the tool
Bits deposition, top are cut according to the tops drill assembly such as casing program and section milling technological requirement connection drill collar, heavy weight drill pipe, drilling rod
When cutting casing, by section milling tool G.I.H, it is unable to turn on pump in going down process, until cutting blade 10 is lowered into design casing
Upper the window's position of section milling, small displacement, which starts, at this time drilling pump and makes drilling tool rotate, and drilling fluid passes through drilling tool inner flow passage and reaches
The position of piston 5 and lower piston 13, due to according to design lower piston spring thrust it is smaller, only need to be generated on lower piston nozzle 16
Smaller pressure drop can push lower piston 13 take the lead in downlink release wiper block 21, so that the wiper block is pushed against internal surface of sleeve pipe, to make
Whole section milling tool is placed in the middle in casing.
As shown in figure 3, continuing to improve discharge capacity makes upper piston 5 generate enough pressure drops to obtain enough downlink thrust,
10 overhanging beginning Casing-Cutting of cutting blade is pushed, illustrates casing when drilling tool torque is reduced to even numerical and no longer reduces
It is cut through, the decentralization drilling tool that can pressurize at this time carries out normal reach milling operation.
In whole section milling operating process, section milling tool can be all pushed against centered position in casing by wiper block 21, to
The radial vibration for greatly reducing tool improves the stability and section milling efficiency of section milling.
Claims (5)
1. a kind of section milling tool of band self-regulation centralizer, including upper body, cutting blade and upper piston；Wherein, upper body cylinder
More than two cutter film traps are equipped at intervals on wall, cutting blade is by setting cutting blade locating piece, the connection of cutting blade axis pin
In cutter film trap, upper piston top is slidingly sealed cooperation with upper body upper inside wall composition, and upper piston lower part is equipped with and cuts
The convex block that cutting blade slides axially, radial support coordinates is equipped with spring cavity, the setting of upper piston spring between upper piston and upper body
Axial support is formed in spring cavity and to upper piston；It is characterized in that：The upper body lower part is extended with lower body, lower body cylinder
Wall is equipped with more than two wiper block slots being spaced apart, and wiper block is connected to and is helped by wiper block locating piece, wiper block axis pin
In positive block slot；Lower piston is set in lower body, and lower piston top is slidingly sealed cooperation, lower work with lower body upper inside wall composition
Plug lower part is equipped with spring cavity equipped with the convex block to slide axially with wiper block, radial support coordinates between lower piston and lower body, under
Piston spring is arranged in spring cavity and forms axial support to lower piston.
2. the section milling tool of band self-regulation centralizer according to claim 1, it is characterised in that：Prolong the upper piston lower part
Lower piston is extended to, and slides axially with lower piston inner wall composition and seals cooperation.
3. the section milling tool of band self-regulation centralizer according to claim 1 or 2, it is characterised in that：The upper piston and
Piston nozzle sealing ring, piston nozzle are respectively equipped on lower piston.
4. the section milling tool of band self-regulation centralizer according to claim 3, it is characterised in that：The upper piston with upper
It is equipped with sealing element between body, between lower piston and lower body, between lower piston and upper piston.
5. the section milling tool of band self-regulation centralizer according to claim 4, it is characterised in that：Upper body is with lower body
The separate structure of threaded connection, the upper end of upper body and the lower end of lower body are respectively equipped with nipple.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721882703.7U CN207944901U (en) | 2017-12-28 | 2017-12-28 | A kind of section milling tool of band self-regulation centralizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721882703.7U CN207944901U (en) | 2017-12-28 | 2017-12-28 | A kind of section milling tool of band self-regulation centralizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207944901U true CN207944901U (en) | 2018-10-09 |
Family
ID=63700764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721882703.7U Active CN207944901U (en) | 2017-12-28 | 2017-12-28 | A kind of section milling tool of band self-regulation centralizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207944901U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113530473A (en) * | 2020-04-19 | 2021-10-22 | 中石化石油工程技术服务有限公司 | Casing section mills with righting instrument |
| CN115976989A (en) * | 2023-03-22 | 2023-04-18 | 天津德嘉预应力钢绞线有限公司 | Hollow prestressed steel strand |
-
2017
- 2017-12-28 CN CN201721882703.7U patent/CN207944901U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113530473A (en) * | 2020-04-19 | 2021-10-22 | 中石化石油工程技术服务有限公司 | Casing section mills with righting instrument |
| CN115976989A (en) * | 2023-03-22 | 2023-04-18 | 天津德嘉预应力钢绞线有限公司 | Hollow prestressed steel strand |
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