CN202578516U - Borehole enlarger - Google Patents
Borehole enlarger Download PDFInfo
- Publication number
- CN202578516U CN202578516U CN 201220073716 CN201220073716U CN202578516U CN 202578516 U CN202578516 U CN 202578516U CN 201220073716 CN201220073716 CN 201220073716 CN 201220073716 U CN201220073716 U CN 201220073716U CN 202578516 U CN202578516 U CN 202578516U
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- CN
- China
- Prior art keywords
- housing
- cutter
- pin
- groove
- spring
- 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 discloses a borehole enlarger which comprises an upper joint, a seal ring, a shell, a spring, an inner shaft, a movable pin, a cutting knife, a baffle and a pin, wherein the upper joint is connected with the shell which is provided with the cutting knife; the inner shaft is installed in the shell; and the spring is installed between the shell and the inner shaft. The borehole enlarger is reasonable in technical design, advanced in functions, good in integrity, light in weight, small in axial motion range, strong in cutting ability, large in reaming range, safe in recovery, simple and fast in operation, accurate and flexible in control, easy to operate and wide in application range, safe and stable, time-saving and labor-saving, suitable for reaming operations of vertical wells, horizontal wells, highly-deviated wells and other wells, and can be widely applied to oil exploitation and production.
Description
Technical field
The utility model relates to oil exploitation drilling power tool, and particularly a kind of well expands instrument.
Background technology
At present; A kind of drilling power tool is arranged, and its structure is a cutter, on original straight well, carries out window sidetracking; For oil exploitation drilling operation contributes; But it exists following shortcoming or deficiency simultaneously: 1. because the used drill bit of sidetracked hole is less, and the annular space that side-tracked hole is lowered to behind the small casing and between the borehole wall is less, cementing well is second-rate; 2. conventional gear wheel reaming hole instrument is owing to receive the restriction of gear wheel bearing, and the job execution difficulty is big; 3. exist the fall accident potential of well of gear wheel; 4. axially movable amplitude is big, cutting power weak, the reaming hole scope is little, it is dangerous to reclaim.
Summary of the invention
The order of the utility model provides a kind of well and expands instrument, adopts the combining structure of cutter, interior axle, the shortcoming or the deficiency that overcome effectively or avoid existing in the above-mentioned prior art, and accurate and flexible, safety and steady ground carry out the window sidetracking operation on straight well.
The described well of the utility model expands instrument, comprises top connection, sealing ring, housing, spring, interior axle, movable pin, cutter, baffle plate, pin.Said top connection is connected with housing, and cutter is installed on the housing, and interior axle is installed in the housing, between housing and the interior axle spring is installed.
Wherein, said lower housing portion circumference is provided with 2-6 groove, and the top of cutter is fixed in this groove by the removable pin subactivity.On the groove lower edge of said housing baffle plate is installed, fixes by pin and housing.Said cutter is provided with 2-6, and its underpart is the inner cone structure, and the bottom of this inner cone is provided with interior step.The upper, middle and lower portion of axle is provided with outer groove in said, in the outer groove of top sealing ring is installed, and in the outer groove of middle part spring is installed, and the inner convex platform of cutter places the bottom outer groove.The bottom of axle is the Outer Taper structure in said, matches with the inner cone of cutter bottom.
The utility model has following advantage compared with prior art:
1, technical design is reasonable, and function is advanced, good integrity;
2, in light weight, axial movable amplitude is little, cutting power strong, the reaming hole scope is big, reclaim safety;
3, simple and efficient to handle, precise control flexibly, safety and steady, time saving and energy saving, be easy to grasp;
4, applied widely, be applicable to the reaming hole operation of various hole conditions such as straight well, horizontal well, high angle hole.
Description of drawings
Fig. 1 is a kind of example structure sketch map of the utility model.
The specific embodiment
Consult Fig. 1; A kind of well expands instrument; Comprise top connection 1, sealing ring 2, housing 3, spring 4, interior axle 5, movable pin 6, cutter 7, baffle plate 8, pin 9, it is characterized in that said top connection 1 is connected with housing 3, is equipped with cutter 7 on the housing 3; Axle 5 in being equipped with in the housing 3 is equipped with spring 4 between housing 3 and the interior axle 5.
Wherein, said housing 3 lower circumference are provided with 2-6 groove, are denoted as 4 among the figure, and the top of cutter 7 is fixed in this groove by movable pin 6 activities.On the groove lower edge of said housing 3 baffle plate 8 is installed, fixes by pin 9 and housing 3.Play the effect that stops when cutter 7 is outwards moved, too much come off to prevent cutter 7 outstanding 3.Said cutter 7 is provided with 2-6, is denoted as 4 among the figure, and its underpart is the inner cone structure, and the bottom of this inner cone is provided with interior step.The upper, middle and lower portion of axle 5 is provided with outer groove in said, and sealing ring 2 is installed in the outer groove of top, and spring 4 is installed in the outer groove of middle part, and the inner convex platform of cutter 7 places the bottom outer groove.The bottom of axle 5 is the Outer Taper structure in said, matches with the inner cone of cutter 7 bottoms.
During work, the utility model is connected with the top tubing string, and the fluid in the tubing string of top gets into interior axle 5 tops through 1 passage; Apply active force on interior axle 5, the elastic force that interior axle 5 overcomes spring 4 moves downward, and it serves as axially outer motion with movable pin 6 that interior axle 5 bottom cones promote cutter 7; Till the interior step of cutter 7 lower ends receives the obstruction of baffle plate 8; This moment, cutter 7 received top tubing string revolving force drive carrying out circular motion, and rock around the cutting well plays the purpose that expands well.The annular seal space on axle 5 tops and lower passage are linked up simultaneously, and liquid is descending, get into well to the bottom, return on cooling cutter 7 and the cutting carring.
Claims (6)
1. a well expands instrument; Comprise top connection, sealing ring, housing, spring, interior axle, movable pin, cutter, baffle plate, pin, it is characterized in that said top connection is connected with housing, is equipped with cutter on the housing; Interior axle is installed in the housing, between housing and the interior axle spring is installed.
2. well according to claim 1 expands instrument, it is characterized in that said lower housing portion circumference is provided with 2-6 groove, and the top of cutter is fixed in this groove by the removable pin subactivity.
3. well according to claim 1 and 2 expands instrument, it is characterized in that on the groove lower edge of said housing baffle plate being installed, and is fixed by pin and housing.
4. well according to claim 1 expands instrument, it is characterized in that said cutter is provided with 2-6, and its underpart is the inner cone structure, and the bottom of this inner cone is provided with interior step.
5. well according to claim 1 expands instrument, it is characterized in that the upper, middle and lower portion of said interior axle is provided with outer groove, in the outer groove of top sealing ring is installed, and in the outer groove of middle part spring is installed, and the inner convex platform of cutter places the bottom outer groove.
6. expand instrument according to claim 1 or 5 described wells, it is characterized in that the bottom of said interior axle is the Outer Taper structure, match with the inner cone of cutter bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220073716 CN202578516U (en) | 2012-03-02 | 2012-03-02 | Borehole enlarger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220073716 CN202578516U (en) | 2012-03-02 | 2012-03-02 | Borehole enlarger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202578516U true CN202578516U (en) | 2012-12-05 |
Family
ID=47247937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220073716 Expired - Fee Related CN202578516U (en) | 2012-03-02 | 2012-03-02 | Borehole enlarger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202578516U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104712276A (en) * | 2015-03-18 | 2015-06-17 | 长江大学 | Hydraulic internal cutter for cutting sleeve in deep sea |
-
2012
- 2012-03-02 CN CN 201220073716 patent/CN202578516U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104712276A (en) * | 2015-03-18 | 2015-06-17 | 长江大学 | Hydraulic internal cutter for cutting sleeve in deep sea |
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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: 20121205 Termination date: 20130302 |