CN202611642U - Eccentric reaming mill shoe - Google Patents
Eccentric reaming mill shoe Download PDFInfo
- Publication number
- CN202611642U CN202611642U CN 201220287819 CN201220287819U CN202611642U CN 202611642 U CN202611642 U CN 202611642U CN 201220287819 CN201220287819 CN 201220287819 CN 201220287819 U CN201220287819 U CN 201220287819U CN 202611642 U CN202611642 U CN 202611642U
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- milling
- mill
- shoe
- eccentric reaming
- face
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Abstract
The utility model relates to an eccentric reaming mill shoe which is characterized in that the eccentric reaming mill shoe is a cone. Six rectangular bodies are distributed on a body on the cone at a 60-degree angle, a mill face with a taper alpha of 45 degrees is arranged on a rectangular body close to a lower connector, a gauge protection polishing face with a taper alpha of 45 degrees is arranged on a rectangular body close to an upper connector, the body and the mill face are not on the same concentric line, water guide grooves are arranged between mill teeth of the six rectangular bodies, and water holes are arranged in the centers from the lower connector to the upper connector in penetrating mode. Compared with the prior art, the eccentric reaming mill shoe has the advantages of simplifying procedures, reducing operation time and reducing working strength of workers. A screw drill is lowered into a shaft, drilling and reaming can be finished through one row of tubular columns without replacing drill tools, and operation time efficiency is improved.
Description
Technical field
The utility model relates to a kind of eccentric reaming hole milling shoe that uses the screw drill drilling out at oil, gas, well pit shaft.
Background technology
When in oil, gas, well, carrying out the measure operation, regular meeting adopts the process of cementing plug that temporary transient shutoff is carried out on the stratum, treat that the measure operation is accomplished after, need drill through cement plug and recover the pit shaft latus rectum.BHA commonly used is: tricone bit+screw drill+oil pipe.During drilling out; Because the tricone bit external diameter is less than shaft in wall 6-8mm, residual a part of body of cement on casing wall always, drill through cement plug after; Following well tool can't pass through in drilling out well section; Need next time BHA again, promptly junk mill+screw drill+oil pipe is cleared up the body of cement of internal surface of sleeve pipe, reaches the purpose of recovering the well latus rectum.This drilling out technology and instrument weak point are to have adopted milling BHA twice, have prolonged construction period, have increased hand labor intensity, and labour cost is high.
Summary of the invention
To the deficiency of existing milling tool, the purpose of the utility model is to provide a kind of eccentric reaming hole milling shoe.Utilize it, the drawback of the residual body of cement of internal surface of sleeve pipe when having overcome the screw drill drilling out first, secondly one-trip string just can be accomplished and bore plug, reaming hole two procedures, has practiced thrift activity duration and working strength of workers, has improved the operation timeliness.
The purpose of the utility model is to accomplish like this:
A kind of eccentric reaming hole milling shoe is formed the steel body by lower contact, body, milling face, guarantor footpath burnishing surface, guiding gutter, top connection and hydrophthalmia.Eccentric reaming hole milling shoe is a cone; Body on the cone be 60 ° of angles distributing six the fan cuboids; Cuboid is that tapering α is 45 ° a milling face near lower contact, is that tapering α is 45 ° a guarantor footpath burnishing surface near top connection, and body and milling face be not on a concentric line; Six fan cuboid milling between cog have guiding gutter, and lower contact has the hydrophthalmia of perforation to the top connection center.
The advantage of the utility model and the beneficial effect of generation are:
1, the utility model is connected between screw drill and the tricone bit, is lowered in the pit shaft, and one-trip string just can be accomplished and bore plug and reaming hole; Need not change drilling tool, compared with prior art, simplify operation; Reduced the activity duration; Reduce staff labor intensity, improved the operation timeliness, solved the problem that man-hour is long, operation is many, labour intensity is big of existing instrument.
2, the utility model is a cone, and body is six fan rectangle milling bodies, and its end face is inlayed YD alloy, shop weldering tungsten steel block, has played wear-resisting and effect that increase the service life; Body and milling part make the entire outer diameter of actual milling scope greater than milling shoe not on a concentric line; Protect the footpath burnishing surface and played the effect that keeps milling shoe external diameter and protective casing.
3,2012, the utility model was after the field trial success, and it is very obvious successively to apply effect at 6 mouthfuls of wells, and individual well is practiced thrift 3 days engineering times, has reduced the consumption of independent reaming hole operation and material, effectively reduces working strength of workers simultaneously.
Description of drawings
Fig. 1 is the utility model partial sectional view.
Fig. 2 is Figure 1A-A ' cross-section side view.
The specific embodiment
Shown in Fig. 1-2, a kind of eccentric reaming hole milling shoe is formed the steel body by lower contact 1, body 2, milling face 3, guarantor footpath burnishing surface 4, guiding gutter 5, top connection 6 and hydrophthalmia 7.Eccentric reaming hole milling shoe is a cone; Body 2 on the cone be 60 ° of angles distributing six the fan cuboids; Cuboid is that tapering α is 45 ° a milling face 3 near lower contact 1, and its end face is inlayed the YD alloy, shop weldering tungsten steel block forms the milling tooth, has played wear-resisting and effect that increase the service life; Near top connection 6 is that tapering α is 45 ° a guarantor footpath burnishing surface 4, mainly plays the footpath effect of protecting.Body 2 and milling face 3 be not on a concentric line, and six fan cuboid milling between cog have guiding gutter 5, and there is the hydrophthalmia 7 of perforation at lower contact 1 to top connection 6 centers.
At first the top connection 6 of eccentric reaming hole milling shoe and the lower ends of screw drill are connect, lower contact 1 is connected with tricone bit.Cement plug face position in the working design; Utilize the rotation of hydro powered screw drill, drive the rotation of eccentric reaming hole milling shoe and tricone bit, gradually pressurization; After the broken cement plug of tricone bit forms passage; Continue to creep into, 3 pairs in the rotation milling face of eccentric reaming hole milling shoe bores the passage reaming hole milling once more behind the plug, the residual body of cement of cleaning internal surface of sleeve pipe.Protecting footpath burnishing surface 4 has guaranteed not hurt sleeve pipe in the milling process of eccentric reaming hole milling shoe.Fluid column carries the cement bits and returns out ground by guiding gutter 5 after accomplishing milling through hydrophthalmia 7.Continue to creep into, once accomplish and bore plug and reaming hole.
Claims (1)
1. eccentric reaming hole milling shoe; Form the steel body by lower contact (1), body (2), milling face (3), guarantor footpath burnishing surface (4), guiding gutter (5), top connection (6) and hydrophthalmia (7); It is characterized in that eccentric reaming hole milling shoe is a cone, the body on the cone (2) be 60 ° of angles distributing six the fan cuboids, cuboid is that tapering α is 45 ° a milling face (3) near lower contact (1); Near top connection (6) is that tapering α is 45 ° a guarantor footpath burnishing surface (4); Body (2) and milling face (3) be not on a concentric line, and six fan cuboid milling between cog have guiding gutter (5), and lower contact (1) has the hydrophthalmia (7) of perforation to top connection (6) center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220287819 CN202611642U (en) | 2012-06-08 | 2012-06-08 | Eccentric reaming mill shoe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220287819 CN202611642U (en) | 2012-06-08 | 2012-06-08 | Eccentric reaming mill shoe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202611642U true CN202611642U (en) | 2012-12-19 |
Family
ID=47345351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220287819 Expired - Fee Related CN202611642U (en) | 2012-06-08 | 2012-06-08 | Eccentric reaming mill shoe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202611642U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112031692A (en) * | 2020-09-14 | 2020-12-04 | 北京博德世达石油技术股份有限公司 | External positioning milling composite milling shoe, and oil drilling equipment and method adopting same |
-
2012
- 2012-06-08 CN CN 201220287819 patent/CN202611642U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112031692A (en) * | 2020-09-14 | 2020-12-04 | 北京博德世达石油技术股份有限公司 | External positioning milling composite milling shoe, and oil drilling equipment and method adopting same |
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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: 20121219 Termination date: 20140608 |