CN203035147U - Casing repair and expanding milling cutter - Google Patents
Casing repair and expanding milling cutter Download PDFInfo
- Publication number
- CN203035147U CN203035147U CN 201220622365 CN201220622365U CN203035147U CN 203035147 U CN203035147 U CN 203035147U CN 201220622365 CN201220622365 CN 201220622365 CN 201220622365 U CN201220622365 U CN 201220622365U CN 203035147 U CN203035147 U CN 203035147U
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- Prior art keywords
- milling cutter
- main body
- cutter main
- cone
- milling
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- Expired - Fee Related
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Abstract
The utility model relates to a workover treatment tool of a horizontal well, in particular to a casing repair and expanding milling cutter. The casing repair and expanding milling cutter comprises a drill pipe joint, a milling cutter main body and a milling cone which are connected with one another from top to bottom in sequence. A tapered plunger is mounted in the milling cutter main body, the upper end of the tapered plunger and the milling cutter main body are sealed through a seal ring, a spring pocket is mounted between the lower end of the tapered plunger and the milling cutter main body, a reset spring is mounted on the inner side of the spring pocket, the reset spring is sleeved on the lower end of the tapered plunger, the upper end of the reset spring abuts against a step of the tapered plunger, the lower end of the reset spring abuts against a step of the milling cutter main body; a cutter body welded with alloy sheets and alloy pillars is mounted in a side hole of the milling cutter main body, an inner inverted conical surface of the cutter body is matched with an outer inverted conical surface of the tapered plunger, and springs are mounted at two ends of the cutter body. By means of the casing repair and expanding milling cutter, casing repair processes are reduced effectively, the labor intensity of workers in making a trip pillar is reduced, casing repair efficiency in expanding is improved, and heavy repair cost is saved.
Description
Technical field:
The utility model relates to a kind of horizontal well workover treatment instrument, and particularly a kind of sleeve pipe is repaired the hole enlargement milling cutter.
Background technology:
At present, horizontal well development process middle sleeve necking deformation and damage are more common, and sleeve pipe hole enlargement reparation mainly is tube expander and mills awl and repair two kinds of technologies that tube expander reparation drill string reinforcing in horizontal well is limited, is difficult to reparation to original latus rectum; Mill awl and repair and to need classification to be lowered to milling tool, and major diameter removes in the process blocked portion easily when milling the awl radial dimension near casing inner diameter, repeatedly change and mill awl and cause drilling labour intensity bigger, more influence efficiency of construction.
The utility model content:
The technical problems to be solved in the utility model provides a kind of sleeve pipe and repairs the hole enlargement milling cutter, and this device has been realized effective minimizing repairing casing operation, reduces the workman and removes drill string labour intensity, improves undergauge casing remediation efficiency, saves the overhaul cost.Having overcome the existing awl repairing casing that mills needs repeatedly to change to mill awl, and drilling labour intensity is big, the deficiency that remediation efficiency is low.
Technical solution adopted in the utility model is: a kind of sleeve pipe is repaired the hole enlargement milling cutter, comprises tool joint, milling cutter main body and mills cone; Tool joint, milling cutter main body and mill cone and be connected in turn from top to bottom, the tapering plunger is installed in the milling cutter main body, tapered post hold beyond the Great Wall and the milling cutter main body between seal by sealing ring, between tapering plunger lower end and the milling cutter main body spring housing is installed, the spring housing installed inside has back-moving spring, back-moving spring is sleeved on tapered post plug lower end, and the back-moving spring upper end withstands on the step place of tapering plunger, and the lower end withstands on the step of milling cutter main body; The cutter hub that is welded with alloy sheet and alloy column is installed in the side opening of milling cutter main body, the interior inverted cone surface of cutter hub and the outer inverted cone surface of tapering plunger match, the compression spring is equipped with at the cutter hub two ends, and compression spring upper end is pressed with pressing plate, and pressing plate is fixed on the milling cutter main body by gland screw; Mill the cone surface and be welded with alloy block and cone alloy column, mill the cone lower end and be provided with nozzle.
The number of cutter hub is 3.
The beneficial effects of the utility model are: the utility model is owing to adopted the efficient milling structure of front end tapering and middle part three wings hole enlargement brill milling cutter construction, thereby have to make and mill taper thread grinding and mill to bore with hole enlargement and mill function in the effect of one, effectively reduce the repairing casing operation, reduce the workman and remove drill string labour intensity, improve undergauge casing remediation efficiency, save the overhaul cost.
Description of drawings:
The utility model is described in more detail below in conjunction with the drawings and specific embodiments.
Accompanying drawing is structural representation of the present utility model.
The specific embodiment:
As shown in drawings, a kind of sleeve pipe is repaired the hole enlargement milling cutter, comprises tool joint 1, milling cutter main body 2 and mills cone 12; Tool joint 1, milling cutter main body 2 and mill cone 12 and be connected in turn from top to bottom, tapering plunger 4 is installed in the milling cutter main body 2, seal by sealing ring 3 between tapering plunger 4 upper ends and the milling cutter main body 2, between tapering plunger 4 lower ends and the milling cutter main body 2 spring housing 11 is installed, spring housing 11 installed inside have back-moving spring 10, back-moving spring 10 is sleeved on tapering plunger 4 lower ends, and back-moving spring 10 upper ends withstand on the step place of tapering plunger 4, and the lower end withstands on the step of milling cutter main body 2; 3 cutter hubs 8 that are welded with alloy sheet 6 and alloy column 7 are installed in respectively in 3 side openings of milling cutter main body 2, the interior inverted cone surface of cutter hub 8 and the outer inverted cone surface of tapering plunger 4 match, compression spring 9 is equipped with at cutter hub 8 two ends, compression spring 9 upper ends are pressed with pressing plate, and pressing plate is fixed on the milling cutter main body 2 by gland screw 5; Mill cone 12 surfaces and be welded with alloy block 13 and cone alloy column 14, mill cone 12 lower ends and be provided with nozzle 15.
The utility model is by the drilling rod G.I.H, when milling cone 12 conical surfaces and contact the crimp sleeve pipe with side alloy block 13, rotary drill column makes the cutting edge rotation milling cutting deformation sleeve pipe that mills cone 12 in the time of the direct circulation workover fluid, control the pressure of the drill, rotating speed and workover fluid discharge capacity well according to the feeding situation, guarantee that the safe and efficient cutting of milling hole enlargement milling head repairs the undergauge sleeve pipe.After finishing elementary hole enlargement reparation, the drill string follow-up moves down, tapering plunger 4 moves down under the effect of circulation pressure reduction, two male cone (strobilus masculinus)s of himself promote three cutter hub 8 enlarged, and (maximum cutlery size is less than casing inner diameter 4-5mm, guarantee that the hole enlargement repair coverage is in corresponding sleeve pipe), when touching the sleeve pipe of elementary hole enlargement reparation, cutter hub 8 then bores to mill repairs the undergauge sleeve pipe, the metal fillings that the elementary milling of front end and secondary hole enlargement brill mill is along with workover fluid recycles pit shaft, cut cutlery simultaneously under the cooling of workover fluid, guarantee stock-removing efficiency and intensity, thereby improved the hole enlargement remediation efficiency of sleeve shrinking diameter well.Stop the workover fluid that circulates behind the reparation undergauge, the pressure reduction of tapering plunger 4 upper and lower sides disappears, back-moving spring 10 elongations, and it is up to promote tapering plunger 4, and cutter hub 8 is inside undergauge under the effect of compression spring 9, just can propose sleeve pipe then smoothly and repair the hole enlargement milling cutter.
Be understandable that, more than about specific descriptions of the present utility model, only for the utility model being described and being not to be subject to the described technical scheme of the utility model embodiment, those of ordinary skill in the art is to be understood that, still can make amendment or be equal to replacement the utility model, to reach identical technique effect; Use needs as long as satisfy, all within protection domain of the present utility model.
Claims (2)
1. a sleeve pipe is repaired the hole enlargement milling cutter, comprises tool joint (1), milling cutter main body (2) and mills cone (12); It is characterized in that: tool joint (1), milling cutter main body (2) with mill cone (12) and be connected in turn from top to bottom, tapering plunger (4) is installed in the milling cutter main body (2), seal by sealing ring (3) between tapering plunger (4) upper end and the milling cutter main body (2), between tapering plunger (4) lower end and the milling cutter main body (2) spring housing (11) is installed, spring housing (11) installed inside has back-moving spring (10), back-moving spring (10) is sleeved on tapering plunger (4) lower end, back-moving spring (10) upper end withstands on the step place of tapering plunger (4), and the lower end withstands on the step of milling cutter main body (2); The cutter hub (8) that will be welded with alloy sheet (6) and alloy column (7) is installed in the side opening of milling cutter main body (2), the outer inverted cone surface of the interior inverted cone surface of cutter hub (8) and tapering plunger (4) matches, compression spring (9) is equipped with at cutter hub (8) two ends, compression spring (9) upper end is pressed with pressing plate, and pressing plate is fixed on the milling cutter main body (2) by gland screw (5); Mill cone (12) surface and be welded with alloy block (13) and cone alloy column (14), mill cone (12) lower end and be provided with nozzle (15).
2. repair the hole enlargement milling cutter according to the described sleeve pipe of claim 1, it is characterized in that: the number of described cutter hub (8) is 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220622365 CN203035147U (en) | 2012-11-21 | 2012-11-21 | Casing repair and expanding milling cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220622365 CN203035147U (en) | 2012-11-21 | 2012-11-21 | Casing repair and expanding milling cutter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203035147U true CN203035147U (en) | 2013-07-03 |
Family
ID=48687280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220622365 Expired - Fee Related CN203035147U (en) | 2012-11-21 | 2012-11-21 | Casing repair and expanding milling cutter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203035147U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104389782A (en) * | 2014-12-02 | 2015-03-04 | 中国石油天然气股份有限公司 | Cushioned drainage and gas production plunger |
-
2012
- 2012-11-21 CN CN 201220622365 patent/CN203035147U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104389782A (en) * | 2014-12-02 | 2015-03-04 | 中国石油天然气股份有限公司 | Cushioned drainage and gas production plunger |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130703 Termination date: 20131121 |