CN204344039U - A kind of hydraulic variable diameter junk mill with guide cone - Google Patents
A kind of hydraulic variable diameter junk mill with guide cone Download PDFInfo
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- CN204344039U CN204344039U CN201420804269.0U CN201420804269U CN204344039U CN 204344039 U CN204344039 U CN 204344039U CN 201420804269 U CN201420804269 U CN 201420804269U CN 204344039 U CN204344039 U CN 204344039U
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- cylindrical shell
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- junk mill
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- reshaping device
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Abstract
The utility model discloses a kind of hydraulic variable diameter junk mill with guide cone, comprise cylindrical shell (2); Cylindrical shell lower end is provided with milling reshaping device (8); Milling reshaping device front end is cone structure, and the conical surface of cone is provided with impregnated carbide alloy (9) and for shaping and the carbide alloy rib band (10) that cuts.The utility model is simple, convenient, not easily causes or causes larger well workover accident, facilitating instrument G.I.H; Reshaping device built-up welding is pregnant carbide inserts and chip carbide alloy rib band, and drilling depth is fast, and efficiency is high, can accomplish milling after first shaping; Position-limit mechanism ensures that casing inner diameter is injury-free to greatest extent; The replaceable performance of abrasive dust block adapts to the sleeve pipe of the different pound level of same specification; Maintaining cost is low, if junk mill partial loss wound continues to use after can repairing.
Description
Technical field
the utility model relates to a kind of hydraulic variable diameter junk mill with guide cone, belongs to petroleum well workover technical field.
Background technology
often there will be in petroleum drilling and mining process because the reason such as casing deformation, corrosion causes well blocked, cause and can not continue to creep into or oil duct is interrupted, need dredging well to resume work.Well is resumed work following several operating type usually: plastic operation, benefit connect operation or fishing etc.But for the sleeve pipe that distortion is large, shaping tool cannot carry out.At this moment, need first to use milling tool rule well.Milling tool is commonly called as junk mill, and the milling part of junk mill is the carbide alloy of built-up welding, carries out grinding by the carbide alloy inner sleeve endoporus of built-up welding.If junk mill external diameter is consistent with casing inner diameter, not only enter sleeve pipe difficulty down, also can damage the internal surface of sleeve pipe not needing operation, so the outside dimension of conventional junk mill is all be less than casing inner diameter 3-6mm, casing inner diameter can not be recovered completely, have certain obstruction to subsequent job.Hydraulic variable diameter junk mill can regular well to original casing inner diameter.
in prior art ZL96216127 " hydraulic flat-bottom grind shoes " and ZL201220035243.5 " hydraulic expanding junk mill ", it is rotatable that three wing handle tails are equipped with pinhole, utilizes drilling fluid to promote damping piston downwards and strut wing and be expanded to required external diameter and carry out milling cutting.Guide structure is not all established in prior art front end, belongs to flat milling class.The wing of these two kinds of technology rotates around handle of a knife, can not provide enough powerful resistance to cutting; Cutwork completes by terminal knife edge before cutter hub completely in addition, the fast and easy tipping of edge wear, and especially point of a knife burden in outside is maximum, and the well internal diameter repaired out is most probably less than desired size, and efficiency low life-span short phenomenon is also the maximum deficiency of prior art.
Utility model content
the purpose of this utility model is, provides a kind of hydraulic variable diameter junk mill with guide cone.Low to overcome prior art grinding efficiency, the deficiency that the life-span is short.
the technical solution of the utility model:
with a hydraulic variable diameter junk mill for guide cone, comprise cylindrical shell; Cylindrical shell lower end is provided with milling reshaping device; Milling reshaping device front end is cone structure, and the conical surface of cone is provided with impregnated carbide alloy and for shaping and the carbide alloy rib band that cuts.
in the hydraulic variable diameter junk mill of aforementioned strip guide cone, the cylindrical shell above described milling reshaping device is uniformly distributed with abrasive dust block along the circumference, abrasive dust block radially slides with cylindrical shell and is connected, and cylindrical shell is provided with position-limit mechanism.
in the hydraulic variable diameter junk mill of aforementioned strip guide cone, be provided with piston in described cylindrical shell, piston is tubular structure, and the endoporus place of piston upper end is provided with nozzle; Piston and cylindrical shell are slidably connected, and are provided with spring between piston and cylindrical shell.
in the hydraulic variable diameter junk mill of aforementioned strip guide cone, described cylindrical shell upper end is threaded with top connection.
compared with prior art, the utility model is simple, convenient, not easily causes or causes larger well workover accident, facilitating instrument G.I.H; Reshaping device built-up welding is pregnant carbide inserts and chip carbide alloy rib band, and drilling depth is fast, and efficiency is high, can accomplish milling after first shaping; Spacingly ensure that casing inner diameter is injury-free to greatest extent for mechanism; The replaceable performance of abrasive dust block adapts to the sleeve pipe of the different pound level of same specification; Maintaining cost is low, if junk mill partial loss wound continues to use after can repairing.
Accompanying drawing explanation
fig. 1 is structural representation of the present invention.
being labeled as in accompanying drawing: 1-top connection, 2-cylindrical shell, 3-piston, 4-nozzle, 5-spring, 6-abrasive dust block, 7-position-limit mechanism, 8-milling reshaping device, the impregnated carbide alloy of 9-, 10-carbide alloy rib band.
Detailed description of the invention
below in conjunction with drawings and Examples, the utility model is described in further detail, but not as to any restriction of the present utility model.
Embodiment
with a hydraulic variable diameter junk mill for guide cone, as shown in Figure 1.Device shape of the present utility model is elongated rod-shaped, and in order to see structure clearly, figure is divided into three sections of displays side by side by Fig. 1.As seen from Figure 1.Device of the present utility model comprises the cylindrical shell 2 be threaded with top connection 1; Be provided with piston 3 in cylindrical shell 2, piston 3 is tubular structure, and the endoporus place of piston 3 upper end is provided with nozzle 4; Piston 3 and cylindrical shell 2 are slidably connected, and are provided with spring 5 between piston 3 and cylindrical shell 2.Cylindrical shell 2 lower end is provided with milling reshaping device 8; Cylindrical shell 2 above milling reshaping device 8 is uniformly distributed with abrasive dust block 6 along the circumference, and abrasive dust block 6 radially slides with cylindrical shell 2 and is connected, and cylindrical shell 2 is provided with position-limit mechanism 7.Milling reshaping device 8 front end is cone structure, and the conical surface of cone is provided with impregnated carbide alloy 9 and for shaping and the carbide alloy rib band 10 that cuts.
the course of work of the present utility model and principle
as seen from Figure 1, device front end of the present utility model is provided with guide cone, and cylindrical shell 2 is provided with three circumferentially equally distributed abrasive dust blocks 6, three grinding blocks expand outwardly, during grinding, first guide cone cuts, and remaining finishing reaming amount is completed by abrasive dust block 6 below.Divide and complete milling amount (guide cone centrum+guide cone cylinder+grinding block) for three times, abrasive dust block 6 surface adopts again pile-up welding hard alloy and high abrasion, impact-resistant hard alloy particle, substantially increases milling efficiency and application life.The accurate the change of divergence of rule borehole size is minimum, and the grinding block be applicable to can be selected as required to carry out the milling operation of different casing inner diameter; The function that column wing also has righting placed in the middle simultaneously makes milling operation steadily carry out, though blade blunt because of its structure strong also can as shaping roller rule well.
during workover treatment, by device of the present utility model from well head down to needs trim locations, first slowly press down, the conical section of device front end is allowed to insert in sleeve pipe, turn on pump, lower than 3Mpa, is noted observing pump pressure situation, if pump pressure raises suddenly rear reduction, illustrate that sleeve pipe gets through passage by the milling reshaping device 8 of device front end, can continue descending.If pump pressure raises without significant change or the pressure of the drill, slowly should strengthen pump pressure, now, the mud flowing through device produces pressure drop after nozzle throttling, and promote piston 3 descending, three abrasive dust blocks 6 open and are close to sleeve pipe, starts milling sleeve pipe.Abrasive dust block 6 of the present utility model is removable, and change different abrasive dust blocks 6 according to the sleeve pipe of various outer diameter, cylindrical shell is provided with position-limit mechanism 7, can limit the maximum expanded diameter of abrasive dust block 6, and therefore grinding process can ensure sleeve pipe can not be hurt.Milling reshaping device directly can carry out milling to sleeve pipe internal strain larger portion position, looks for logical space, facilitate next step to process to increase.
be more than embody rule example of the present utility model, do not form any restriction of the present utility model, all employings are equal to the technical scheme of replacement or equivalent transformation formation, all belong to protection domain of the present utility model.
Claims (4)
1. the hydraulic variable diameter junk mill with guide cone, comprises cylindrical shell (2); It is characterized in that: cylindrical shell (2) lower end is provided with milling reshaping device (8); Milling reshaping device (8) front end is cone structure, and the conical surface of cone is provided with impregnated carbide alloy (9) and for shaping and the carbide alloy rib band (10) that cuts.
2. the hydraulic variable diameter junk mill according to claim 1 with guide cone, it is characterized in that: the cylindrical shell (2) of described milling reshaping device (8) top is uniformly distributed with abrasive dust block (6) along the circumference, abrasive dust block (6) radially slides with cylindrical shell (2) and is connected, and cylindrical shell (2) is provided with position-limit mechanism (7).
3. the hydraulic variable diameter junk mill according to claim 2 with guide cone, is characterized in that: be provided with piston (3) in described cylindrical shell (2), and piston (3) is tubular structure, and the endoporus place of piston (3) upper end is provided with nozzle (4); Piston (3) and cylindrical shell (2) are slidably connected, and are provided with spring (5) between piston (3) and cylindrical shell (2).
4. the hydraulic variable diameter junk mill according to claim 1 with guide cone, is characterized in that: described cylindrical shell (2) upper end is threaded with top connection (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420804269.0U CN204344039U (en) | 2014-12-18 | 2014-12-18 | A kind of hydraulic variable diameter junk mill with guide cone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420804269.0U CN204344039U (en) | 2014-12-18 | 2014-12-18 | A kind of hydraulic variable diameter junk mill with guide cone |
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| Publication Number | Publication Date |
|---|---|
| CN204344039U true CN204344039U (en) | 2015-05-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420804269.0U Active CN204344039U (en) | 2014-12-18 | 2014-12-18 | A kind of hydraulic variable diameter junk mill with guide cone |
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| CN (1) | CN204344039U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107893640A (en) * | 2017-11-07 | 2018-04-10 | 孙伟峰 | A kind of down-hole string drilling tool |
| CN111140201A (en) * | 2020-02-18 | 2020-05-12 | 盐城华亚石油机械制造有限公司 | Special paraffin removal mill shoe for horizontal well screw drilling tool |
| CN111894522A (en) * | 2020-07-28 | 2020-11-06 | 合力（天津）能源科技股份有限公司 | Damping hydraulic power type switchable rotary scraping sleeve milling tool |
| CN113266294A (en) * | 2021-07-06 | 2021-08-17 | 新疆华油油气工程有限公司 | Diameter-reducible anti-blocking milling cone and use method thereof |
| CN114165181A (en) * | 2021-11-10 | 2022-03-11 | 四川沃德沃富石油科技有限公司 | Nozzle in guide mill shoe and mill shoe with nozzle |
| CN114165182A (en) * | 2021-12-10 | 2022-03-11 | 四川沃德沃富石油科技有限公司 | Integral type slant windowing tool |
| CN115478801A (en) * | 2021-06-16 | 2022-12-16 | 大庆油田有限责任公司 | Reducing milling cone |
| CN115958227A (en) * | 2022-12-24 | 2023-04-14 | 贵州高峰石油机械股份有限公司 | Multi-stage flexible shaper |
-
2014
- 2014-12-18 CN CN201420804269.0U patent/CN204344039U/en active Active
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107893640B (en) * | 2017-11-07 | 2020-08-25 | 孙伟峰 | Downhole pipe column punching tool |
| CN107893640A (en) * | 2017-11-07 | 2018-04-10 | 孙伟峰 | A kind of down-hole string drilling tool |
| CN111140201B (en) * | 2020-02-18 | 2022-04-26 | 盐城华亚石油机械制造有限公司 | Special paraffin removal mill shoe for horizontal well screw drilling tool |
| CN111140201A (en) * | 2020-02-18 | 2020-05-12 | 盐城华亚石油机械制造有限公司 | Special paraffin removal mill shoe for horizontal well screw drilling tool |
| CN111894522A (en) * | 2020-07-28 | 2020-11-06 | 合力（天津）能源科技股份有限公司 | Damping hydraulic power type switchable rotary scraping sleeve milling tool |
| CN115478801A (en) * | 2021-06-16 | 2022-12-16 | 大庆油田有限责任公司 | Reducing milling cone |
| CN113266294B (en) * | 2021-07-06 | 2023-02-17 | 新疆华油油气工程有限公司 | Diameter-reducible anti-sticking milling cone and use method thereof |
| CN113266294A (en) * | 2021-07-06 | 2021-08-17 | 新疆华油油气工程有限公司 | Diameter-reducible anti-blocking milling cone and use method thereof |
| CN114165181A (en) * | 2021-11-10 | 2022-03-11 | 四川沃德沃富石油科技有限公司 | Nozzle in guide mill shoe and mill shoe with nozzle |
| CN114165182A (en) * | 2021-12-10 | 2022-03-11 | 四川沃德沃富石油科技有限公司 | Integral type slant windowing tool |
| CN114165182B (en) * | 2021-12-10 | 2024-04-26 | 四川沃德沃富石油科技有限公司 | Integral type slant instrument of windowing |
| CN115958227A (en) * | 2022-12-24 | 2023-04-14 | 贵州高峰石油机械股份有限公司 | Multi-stage flexible shaper |
| CN115958227B (en) * | 2022-12-24 | 2024-04-16 | 贵州高峰石油机械股份有限公司 | Multistage flexible shaper |
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