CN2276071Y - Hydraulic flat-bottom grind shoes - Google Patents
Hydraulic flat-bottom grind shoes Download PDFInfo
- Publication number
- CN2276071Y CN2276071Y CN 96216127 CN96216127U CN2276071Y CN 2276071 Y CN2276071 Y CN 2276071Y CN 96216127 CN96216127 CN 96216127 CN 96216127 U CN96216127 U CN 96216127U CN 2276071 Y CN2276071 Y CN 2276071Y
- Authority
- CN
- China
- Prior art keywords
- piston
- cutter hub
- cylindrical shell
- hollow hole
- utility
- 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
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Abstract
The utility model relates to a pair of hydraulic flat-bottom grind shoes for repairing and drilling well, composed of an upper contact, a barrel body and a hard alloy body, wherein the hard alloy body belongs to a knife body, which is connected with the lower part of the barrel body by a pin shaft; a circular carbide chip is arranged on the surface of the knife body; the top part of the knife body is lined with a hard alloy post; a cone bevel is arranged on the inner side of the knife body; a T-shaped piston with a hollow hole is arranged in the barrel body; a spring is sheathed on the piston and a choke nozzle is on the upper part of the hollow hole of the piston. Because of the non-perishable resistance in the process of the descent, the utility model reduces the frequencies of going down after the resistance and the labor intensity; because the wearing part belongs to the replaceable knife body, and other components can be used repeatedly, then the utility model reduces the cost of replacing new grind shoes.
Description
The utility model relates to a kind of well workover or the flat junk mill of drilling water power, belongs in oil field well workover or the drilling process, for handling the employed a kind of maintenance tool of trouble of lost tool in hole.
At present, the waterpower junk mill in background technology is made up of the hard alloy columnar of top connection, cylindrical shell and the long 12mm of cylindrical shell lower end welding-on or the carbide alloy fragment of shop weldering thickness 10mm.But there is following defective in it: 1) junk mill is to be designed to different specifications according to the specification of well or sleeve pipe is different, and the size (diameter) of cylindrical shell and body lower end alloy body is changeless, meet situations such as hole anomaly or down-hole casing undergauge, junk mill just can not descend the active section of appointment, like this, can only change junk mill, promptly increase the number of times that makes a trip, and the milling effect is also undesirable than small-sized; 2) alloy body of junk mill bottom wearing and tearing in a single day, whole junk mill is all scrapped, thereby instrument cost height.
The purpose of this utility model is to overcome the deficiencies in the prior art and a kind of energy of designing is suitable for and uses in bad hole or the irregular well of casing inner diameter, reduces the number of times that makes a trip, the flat junk mill of the waterpower that reduces production costs.
The purpose of this utility model can realize by following measure:
The utility model mainly is made up of the cemented carbide body of installing on top connection, cylindrical shell and the cylindrical shell, cemented carbide body is a cutter hub, shop, surface at cutter hub is welded with circular carbide chip, its top studs with hard alloy columnar, the inboard of cutter hub is a tapered slope, and cutter hub is connected the bottom of cylindrical shell by bearing pin; One ＂ T also is housed in cylindrical shell, and " the font piston, piston jacket has spring, is provided with hollow hole in the piston, is provided with the choked flow mouth of an internal diameter less than piston hollow hole internal diameter on the top of hollow hole.
When needs carry out the milling construction, specification is arrived the active section of appointment down less than the junk mill of original well or casing inner diameter, start slush pump, on the choked flow mouth on junk mill cylindrical shell inner carrier top, form pressure reduction down, the spring that overlaps on the piston is compressed, and descent of piston is in the descent of piston process, the piston lower end withstands on the inclined-plane of cutter hub inboard, making cutter hub is that axial cylindrical shell opens outward with pin, at this moment, just can carry out the milling operation, after treating that milling finishes, close slush pump, piston under the effect of compressed spring, homing, the cutter hub withdrawal just can propose downhole tool outside the well then.
The utlity model has following advantage: because the specification of the junk mill of going into the well is less than the internal diameter of construction well or sleeve pipe, thereby in the process of going into the well, be difficult for being hampered, reduced the number of times that makes a trip after being hampered, reduce labour intensity, shortened the construction period, reduced cost, simultaneously, cutter hub opens, and has satisfied the specification requirement of down-hole to the milling instrument, so construction quality is better.In addition, consumable accessory is interchangeable cutter hub, and changes easily, and other component can reuse, and have reduced the expense that more renews junk mill.
Description of drawings is as follows:
Fig. 1 is the utility model structural representation;
Fig. 2 is the utility model vertical view with three cutter hubs.
Among the figure: 1-top connection, 2-cylindrical shell, 3-choked flow mouth, 4-piston, 5-spacer pin, 6-spring, 7-cutter hub, 7-1,7-2,7-3 cutter hub.
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, connect cylindrical shell 2 and cutter hub 7 down successively, top connection 1 and cylindrical shell 2 are by being threaded, cutter hub 7 is connected the bottom of cylindrical shell 2 by bearing pin, shop, surface at cutter hub 7 is welded with circular carbide chip, its top studs with hard alloy columnar, and a tapered slope is established in the inboard of cutter hub 7; One ＂ T ＂ font piston 4 also is housed in cylindrical shell 2, is with spring 6 on the piston 4, piston 4 is provided with hollow hole, is provided with the choked flow mouth 3 of an internal diameter less than piston 4 hollow hole internal diameters on the top of hollow hole.When construction, start slush pump, will between the choked flow mouth 3 on the piston 4 upper and lower, form pressure reduction, promoting piston 4 moves downward, piston 4 is in descending process, its bottom withstands on the inclined-plane of cutter hub 7, and making cutter hub 7 is axial cylindrical shell 2 outer stretching out with pin, thereby satisfies the specification requirement of underground work section setting means.For improving the milling quality, the utility model cylindrical shell bottom can connect three cutter hub 7-1,7-2,7-3, and Fig. 2 is the utility model vertical view with three cutter hubs, also can connect 6 cutter hubs, one of them cutter hub position surpasses the cylindrical shell center, and making needs the centre of milling also milling to fall.Opening width for control the utility model cutter hub 7 can design a spacer pin 5 in cylindrical shell 2, by limiting the distance of downstroke, just can set cutter hub 7 open sizes.
Claims (2)
1. well workover or the flat junk mill of drilling water power, form by the cemented carbide body of installing on top connection, cylindrical shell and the cylindrical shell, it is characterized in that cemented carbide body is cutter hub (7), cutter hub is connected the bottom of cylindrical shell (2) by bearing pin, shop, surface at cutter hub is welded with circular carbide chip, its top studs with hard alloy columnar, and the inboard of cutter hub (7) is a tapered slope; Also be provided with the piston that has hollow hole (4) of a ＂ T ＂ font in the cylindrical shell (2), be with spring (6) on the piston (4), the hollow hole top of piston (4) is provided with the choked flow mouth (3) of an internal diameter less than piston (4) hollow hole internal diameter.
2. the flat junk mill of waterpower according to claim 1 is characterized in that the cutter hub (7) that cylindrical shell (2) bottom connects can be 3 or 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96216127 CN2276071Y (en) | 1996-07-30 | 1996-07-30 | Hydraulic flat-bottom grind shoes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96216127 CN2276071Y (en) | 1996-07-30 | 1996-07-30 | Hydraulic flat-bottom grind shoes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2276071Y true CN2276071Y (en) | 1998-03-11 |
Family
ID=33897729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96216127 Expired - Fee Related CN2276071Y (en) | 1996-07-30 | 1996-07-30 | Hydraulic flat-bottom grind shoes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2276071Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111648736A (en) * | 2020-06-03 | 2020-09-11 | 中国石油化工股份有限公司 | Diameter-variable mill shoe for well repair and pipe column assembly using same |
| CN115613990A (en) * | 2022-12-15 | 2023-01-17 | 中国石油集团川庆钻探工程有限公司 | Full-switching reversible water hole grinding shoe |
-
1996
- 1996-07-30 CN CN 96216127 patent/CN2276071Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111648736A (en) * | 2020-06-03 | 2020-09-11 | 中国石油化工股份有限公司 | Diameter-variable mill shoe for well repair and pipe column assembly using same |
| CN115613990A (en) * | 2022-12-15 | 2023-01-17 | 中国石油集团川庆钻探工程有限公司 | Full-switching reversible water hole grinding shoe |
| CN115613990B (en) * | 2022-12-15 | 2023-04-07 | 中国石油集团川庆钻探工程有限公司 | Full-switching reversible water hole grinding shoe |
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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 |