CN2269460Y - Guide cone mill shoe - Google Patents
Guide cone mill shoe Download PDFInfo
- Publication number
- CN2269460Y CN2269460Y CN 96216128 CN96216128U CN2269460Y CN 2269460 Y CN2269460 Y CN 2269460Y CN 96216128 CN96216128 CN 96216128 CN 96216128 U CN96216128 U CN 96216128U CN 2269460 Y CN2269460 Y CN 2269460Y
- Authority
- CN
- China
- Prior art keywords
- piston rod
- cutter hub
- guide cone
- cylindrical shell
- cutter body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000000956 alloy Substances 0.000 claims description 5
- 229910045601 alloy Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims 1
- 238000003801 milling Methods 0.000 abstract description 14
- 238000005553 drilling Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000227 grinding Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Landscapes
- Milling Processes (AREA)
Abstract
The utility model relates to a well repair or drill hole are with guide cone junk mill comprises top connection, barrel, cutter body and guide cone, and the inside hollow upper portion that is equipped with of barrel is the piston rod of stairstepping, and step lower part cover has spring and position sleeve, is equipped with the choke that an internal diameter is less than piston rod cavity bore diameter on the well bore upper portion of piston rod, and the cutter body is by round pin hub connection with the barrel, and guide cone and barrel are by threaded connection, and cutter body and guide cone upper berth have welded the carbide blade, have inlayed the carbide post on the terminal surface, and the cutter body is 3 at least. Because the structure that the piston rod is pushed by the pump pressure to push the cutter body is adopted, the milling diameter can be preselected, and the milling quality is improved.
Description
The utility model relates to a kind of well workover or drilling well Guide cone mill shoe, belongs to the maintenance tool in oil field well workover or the drilling process.
At present, the oil field is in well workover or drilling process, the tubing string that usually runs in the well is met card or fracture, for guaranteeing carrying out smoothly of well workover or drilling well, must clear up the tubing string that these meet card or fracture, cleaning tool commonly used is to have the leading cone shop to weld the fixing Guide cone mill shoe of cutter hub that contains hard alloy blocks, but there is following defective in this junk mill: 1) fix owing to the junk mill cutter hub, unadjustable, thereby when the tubing string internal diameter varies, cause junk mill not by or do not reach technical requirements during grinding; 2) whole junk mill is an one, and when cutter hub or leading cone damage, whole junk mill is all scrapped, and the hard alloy blocks grinding efficiency of built-up welding is not high on cutter hub and the leading cone.
The purpose of this utility model be to overcome the deficiencies in the prior art and design a kind of can be according to casing inner diameter adjustable size joint cutter hub diameter, cutter hub and leading cone are detachable, and cutter hub and leading cone shop are welded with the new Guide cone mill shoe of carbide chip.
The purpose of this utility model can realize by following measure:
The utility model mainly is made up of top connection, cylindrical shell, cutter hub and leading cone, the top that inner barrel is provided with a hollow is step-like piston rod, the step bottom is with spring and positioning sleeve, be provided with the choked flow mouth of an internal diameter less than piston rod hollow hole internal diameter on the hollow hole top of piston rod, cutter hub is connected by bearing pin with cylindrical shell, and leading cone and cylindrical shell are by being threaded, and cutter hub and leading cone upper berth are welded with carbide chip, stud with hard alloy columnar on end face, cutter hub is at least 3.
When the needs junk mill is worked, grind the size of pin as requested, choose the length of positioning sleeve, cutter hub is lowered to minimum diameter when going into the well, behind the active section that arrives appointment, under the pressure differential of piston upper surface and choked flow mouth promoted, piston rod was descending, because piston rod is descending with the pump pressure of mud, thereby promote the cutter hub inclined-plane, cutter hub is outwards launched, and when the lower end of piston rod ran into positioning sleeve, piston rod was no longer descending, make cutter hub be fixed on the size of requirement, then carry out milling work, treat that milling finishes after, close slush pump, piston rod sets back under the effect of spring, cutter hub is also withdrawn in the cylindrical shell, then the state of junk mill when going into the well is proposed to finish milling work outside the well.
The utlity model has following advantage: utilize pump pressure to promote the structure that piston rod promotes cutter hub again owing to adopted, but thereby preliminary election milling diameter, improved the milling quality; Cutter hub and guide shoe and cylindrical shell flexibly connect, thereby detachable, have reduced the instrument cost, and simultaneously, cutter hub and leading cone welding-on have carbide chip, have improved milling efficient.
Description of drawings is as follows:
Fig. 1 is the Guide cone mill shoe structural representation;
Fig. 2 is the upward view of Guide cone mill shoe.
Among the figure: 1-top connection, 2-cylindrical shell, 3-choked flow mouth, 4-piston rod, 5-positioning sleeve, 6-spring, 7-cutter hub, 7-1,7-2,7-3 cutter hub, 8-leading cone.
Below in conjunction with accompanying drawing the utility model is further described:
By accompanying drawing 1 as can be known: the utility model is mainly by top connection 1, cylindrical shell 2, cutter hub 7 and leading cone 8 are formed, top connection 1 and cylindrical shell 2 are by being threaded, the top that inner barrel is provided with a hollow is step-like piston rod 4, the step bottom is with spring 6 and positioning sleeve 5, the length of positioning sleeve 5 be milling as requested diameter size and determine length, be provided with the choked flow mouth 3 of an internal diameter less than piston rod hollow hole internal diameter on the hollow hole top of piston rod, cutter hub 7 and cylindrical shell 2 are connected by bearing pin, leading cone 8 and cylindrical shell 2 are by being threaded, replaceable after cutter hub 7 or leading cone 8 wearing and tearing, cutter hub 7 surperficial upper berths are welded with carbide chip, stud with hard alloy columnar on end face.The conical surface of leading cone 8 and periphery shop are welded with carbide chip, the layout of blade such as Fig. 2, and cutter hub 7 can be installed 3 to 6 as required, and one of them crosses radius the blade on the leading cone 8, and the foul that is positioned at the tubing string center also can be fallen in milling.When junk mill is gone into the well, cutter hub 7 is lowered to minimum diameter, after arriving active section, with the pump pressure of mud under the pressure differential of piston rod 4 upper surfaces and choked flow mouth 3 promotes, piston rod 4 is descending, because piston rod 4 is descending, thereby the lower end of piston rod 4 promotes the inclined-plane of cutter hub 7, cutter hub is outwards launched, when the step of piston rod 4 ran into the positioning sleeve 5 that regulates in advance, piston rod 4 was no longer descending, made cutter hub 7 be fixed on the size of requirement, then carry out milling work, the effect of leading cone 8 is foul smaller in running into the tubing string internal diameter or impurity when hindering junk mill, can carry out milling earlier, guarantees that junk mill is down to desired position, after treating that milling is finished, close slush pump, piston rod 4 sets back under the effect of spring 6, and cutter hub 7 is also withdrawn in the cylindrical shell 2, then the state of junk mill when going into the well proposed to finish milling work outside the well.
Claims (3)
1. Guide cone mill shoe, mainly form by top connection, cylindrical shell, cutter hub and leading cone, top connection (1) is threaded with cylindrical shell (2), it is characterized in that it is step-like piston rod (4) that cylindrical shell (2) inside is provided with a hollow, upper, the step bottom is with spring (6) and positioning sleeve (5), be provided with the choked flow mouth (3) of an internal diameter less than the hollow hole internal diameter of piston rod (4) on the hollow hole top of piston rod (4), cutter hub (7) is connected by bearing pin with cylindrical shell (2), leading cone (8) is connected by breechblock with cylindrical shell, and cutter hub (7) is an inclined-plane with the face that piston rod (4) bottom contacts.
2. Guide cone mill shoe according to claim 1 is characterized in that the surperficial upper berth of cutter hub (7) is welded with carbide chip, studs with hard alloy columnar on end face, and the conical surface and the periphery upper berth of leading cone (8) are welded with hard metal tip.
3. Guide cone mill shoe according to claim 1 and 2 is characterized in that cutter hub (7) is at least 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96216128 CN2269460Y (en) | 1996-07-30 | 1996-07-30 | Guide cone mill shoe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96216128 CN2269460Y (en) | 1996-07-30 | 1996-07-30 | Guide cone mill shoe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2269460Y true CN2269460Y (en) | 1997-12-03 |
Family
ID=33897730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96216128 Expired - Fee Related CN2269460Y (en) | 1996-07-30 | 1996-07-30 | Guide cone mill shoe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2269460Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107816329A (en) * | 2017-10-26 | 2018-03-20 | 中石化石油工程技术服务有限公司 | A kind of device for being used to handle choke tube sand card cable in perforating job with pressure |
| CN109252823A (en) * | 2018-09-20 | 2019-01-22 | 中国石油天然气股份有限公司 | Multi-wing grind shoe synchronous grabbing mechanism and using method |
| CN113027372A (en) * | 2020-11-12 | 2021-06-25 | 北京博德世达石油技术股份有限公司 | Novel wear-resisting high-efficient junk mill |
-
1996
- 1996-07-30 CN CN 96216128 patent/CN2269460Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107816329A (en) * | 2017-10-26 | 2018-03-20 | 中石化石油工程技术服务有限公司 | A kind of device for being used to handle choke tube sand card cable in perforating job with pressure |
| CN107816329B (en) * | 2017-10-26 | 2023-12-12 | 中国石油化工集团有限公司 | Device for processing choke tube sand-blocking cable in perforating operation under pressure |
| CN109252823A (en) * | 2018-09-20 | 2019-01-22 | 中国石油天然气股份有限公司 | Multi-wing grind shoe synchronous grabbing mechanism and using method |
| CN109252823B (en) * | 2018-09-20 | 2023-11-28 | 中国石油天然气股份有限公司 | Synchronous grabbing mechanism for multi-wing mill shoes and use method |
| CN113027372A (en) * | 2020-11-12 | 2021-06-25 | 北京博德世达石油技术股份有限公司 | Novel wear-resisting high-efficient junk mill |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |