CN205778657U - A kind of down-hole string internal cutter - Google Patents
A kind of down-hole string internal cutter Download PDFInfo
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- CN205778657U CN205778657U CN201620510000.0U CN201620510000U CN205778657U CN 205778657 U CN205778657 U CN 205778657U CN 201620510000 U CN201620510000 U CN 201620510000U CN 205778657 U CN205778657 U CN 205778657U
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- cutter
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- hole string
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Abstract
The utility model discloses a kind of down-hole string internal cutter, including main body and cutter bod；Described cutter bod is perpendicular to the central shaft of main body, and point of a knife is outwards arranged in the cutter seat of described lower body part；Cutter bod forms piston mechanism with cutter seat, and described piston structure drives cutter bod stretch out from cutter seat or retract.This utility model down-hole string internal cutter uses piston to be separated by preset to overhead power liquid and inside liquid, it is designed with spring at piston lower portion, it is designed with cutter bod in body interior, surely followed closely in main body the most spacing by location, during helicoid hydraulic motor throw, piston is descending after against the force of the spring under pressure operation, lower liquid pressure increases, it is ultimately applied to cutter bod afterbody by pressure transmission, under pressure, cutter bod slowly stretches out, and crosses and stretches out limit rotary cutting, solves the technical problem using pipe with small pipe diameter cutter to cut relatively Large Diameter Pipeline tubing string.
Description
Technical field
This utility model relates to oil well technical field, particularly to a kind of down-hole string internal cutter.
Background technology
When workover treatment, after down-hole string is by the biggest lifting force, it is impossible to tubing string is stirred, many times needs to be cut off by tubing string inside tubing string, trips out after tubing string on again from the place of cutting off and repair process.Sometimes the internal diameter of tubing string does not allow the cutter of large-size to stretch into；Aperture in tubing string limits the diameter of cutter main body, and the outer wall of cutter main body is relatively big with the spacing of the inwall of tubing string, and the cutter that size is little can't reach；The cutter that size is big cannot suck inside tubing string after loading cutter main body so that uses common cutter to cannot be carried out normally and cuts off operation.
Utility model content
It is unique that the purpose of this utility model is to provide a kind of novel structure, easy to use, and uses pipe with small pipe diameter cutter can cut the down-hole string internal cutter of down-hole string of relatively Large Diameter Pipeline；Concrete technical scheme is:
A kind of down-hole string internal cutter, including main body and cutter bod；Described cutter bod is perpendicular to the central shaft of main body, and point of a knife is outwards arranged in the cutter seat of described lower body part；Cutter bod and cutter seat are set to piston mechanism, and described piston mechanism drives cutter bod stretch out from cutter seat or retract.
Further, described main body includes top connection, overcoat and the lower contact being sequentially connected with.
Further, described cutter seat is arranged in described lower contact.
Further, it is provided with piston and back-moving spring in described overcoat.
Further, described back-moving spring is arranged on the bottom of described piston.
Further, the afterbody of described cutter bod and the outer wall of stem are provided with the annular boss coordinated with described cutter seat inwall slipper seal, constitute described piston mechanism.
Further, it is provided with sealing member between described annular boss and described cutter seat inwall.
Further, described cutter seat is cylindrical hole, and described cutter bod is cylinder.
Further, described cutter seat inwall is provided with spacing steady nail.
This utility model down-hole string internal cutter uses piston to be separated by preset to overhead power liquid and inside liquid, it is designed with spring at piston lower portion, it is designed with cutter bod in body interior, surely followed closely in main body the most spacing by location, during helicoid hydraulic motor throw, piston is descending after against the force of the spring under pressure operation, lower liquid pressure increases, it is ultimately applied to cutter bod afterbody by pressure transmission, under pressure, cutter bod slowly stretches out, and crosses and stretches out limit rotary cutting, solves the technical problem using pipe with small pipe diameter cutter to cut relatively Large Diameter Pipeline tubing string.
Accompanying drawing explanation
Fig. 1 is this utility model down-hole string internal cutter structural representation.
In figure: 1, top connection；1.1, side opening；2, overcoat；3, piston；4, back-moving spring；5, plunger shaft；6, main body；6.1, delivery hole；6.2, cutter seat；7, cutter bod；7.1, point of a knife；7.2, cutter bod afterbody；8, hole for back flow.
Detailed description of the invention
Below with embodiment, this utility model is more fully illustrated.This utility model can be presented as multiple multi-form, is not construed as the exemplary embodiment being confined to describe here.
For ease of explanation, here can use such as " on ", the space relative terms such as D score " left " " right ", for shown in explanatory diagram a element or feature relative to another element or the relation of feature.It should be understood that in addition to the orientation shown in figure, spatial terminology is intended to include device different azimuth in use or operation.Such as, if the device in figure is squeezed, be stated as being positioned at the element of other elements or feature D score will be located into other elements or feature " on ".Therefore, exemplary term D score can comprise upper and lower both orientation.Device can otherwise position (90-degree rotation or be positioned at other orientation), relatively illustrates used herein of space correspondingly to explain.
As it is shown in figure 1, the down-hole string internal cutter in the present embodiment, including main body 6 and cutter bod 7；Cutter bod 7 is perpendicular to the central shaft of main body 6, and point of a knife 7.1 is outwards arranged in the cutter seat 6.2 of lower body part；Cutter bod 7 and cutter seat 6.2 are set to piston mechanism, and piston mechanism drives cutter stretch out from cutter seat 6.2 or retract.
Cutter seat 6.2 is arranged in lower contact, it is possible to reduce the length of main body 6, cost-effective.
Main body 6 includes top connection 1, overcoat 2 and the lower contact being sequentially connected with.Top connection 1, can be threaded connection between overcoat 2 and lower contact, it is also possible to clamping.Coupling part can arrange seal ring seal, it is to avoid seepage.
Form cavity in overcoat 2 after connection, in order to improve the stability of control, it is also possible to arrange piston 3 and back-moving spring 4 in cavity, make piston 3 move back and forth in plunger shaft 5.Back-moving spring 4 may be mounted at the bottom of piston 3, it is also possible to is arranged on the top of piston 3.Fill liquid in plunger shaft 5, the most handy machine oil or stop-leak compound are as the liquid loaded；Machine oil or stop-leak compound viscosity are high, it is not easy to reveal；Cutter and piston had good lubrication simultaneously.Make down-hole string internal cutter aneroid in tubing string by back-moving spring 4, do not have during pressure to work.
It is provided with the annular boss coordinated with cutter seat 6.2 inwall slipper seal on the outer wall of cutter bod afterbody 7.2 and stem, constitutes piston mechanism.The oil pocket of cutter bod afterbody 7.2 is connected with plunger shaft by delivery hole 6.1, and the oil pocket of the stem of cutter bod 7 is by hole for back flow 8 and lower contact outlet.In order to avoid cutter bod 7 transition is stretched out, the inwall at cutter seat 6.2 is provided with spacing steady nail.
In order to improve sealing property, it is also possible to being provided with sealing member between annular boss and cutter seat 6.2 inwall, the set-up mode of sealing member is prior art, repeats no more.
In order to easy to process, cutter seat 6.2 is cylindrical hole, and correspondingly cutter is cylinder, and outer wall is provided with circular boss.
During specific works, down-hole string internal cutter is connected to the helicoid hydraulic motor bottom with pressure guide hole, the bottom, down-hole string internal cutter be vertically connected with centralizer, be lowered into precut tubing string position, down-hole with tubing string.
Arrive and specify position, hydraulic pressure is added by ground pump truck, under the effect of hydraulic coupling, helicoid hydraulic motor starts rotary work, simultaneously, it is poor by the choke pressure that the throttling generation of top connection 1 side opening 1.1 is certain that the liquid on helicoid hydraulic motor top arrives cutter top by pressure guide hole, under the effect of this choke pressure, promote piston 3 compression reseting spring 4 descending, make tool interior fluid pressure raise.Pressure passes to cutter bod 7 by the delivery hole 6.1 of main body, at cutter bod 7 with under the promotion of the piston mechanism of cutter seat 6.2 formation, stretch out from main body 6 side from along cutter seat 6.2, its outside tubing string is carried out rotary cutting, with going deep into of point of a knife 7.1, tubing string is finally cut disconnected.
Ground pump truck stop pump liquid, instrument internal and external pressure balance, under spring force, piston stroking upward reset, cutter bod 7 under the promotion of piston mechanism under return to inside main body 6.
Above-mentioned example be only intended to illustrate this utility model, in addition, the most multiple different embodiment, and these embodiments be all those skilled in the art after comprehension this utility model thought it is also envisioned that therefore, will not enumerate at this.
Claims (9)
1. a down-hole string internal cutter, including main body (6) and cutter bod (7)；It is characterized in that, described cutter bod (7) is perpendicular to the central shaft of described main body (6), and point of a knife (7.1) is outwards arranged in the cutter seat (6.2) of main body (6) bottom；Cutter bod (7) and described cutter seat (6.2) are set to piston (3) mechanism, and described piston (3) mechanism drives cutter bod (7) stretch out from cutter seat (6.2) or retract.
2. down-hole string internal cutter as claimed in claim 1, it is characterised in that described main body (6) includes top connection (1), overcoat (2) and the lower contact being sequentially connected with.
3. down-hole string internal cutter as claimed in claim 2, it is characterised in that described cutter seat (6.2) is arranged in described lower contact.
4. down-hole string internal cutter as claimed in claim 2, it is characterised in that be provided with piston (3) and back-moving spring (4) in described overcoat (2).
5. down-hole string internal cutter as claimed in claim 4, it is characterised in that described back-moving spring (4) is arranged on the bottom of described piston (3).
6. down-hole string internal cutter as claimed in claim 1, it is characterized in that, it is provided with the annular boss coordinated with the inwall slipper seal of described cutter seat (6.2) on the afterbody of described cutter bod and the outer wall of stem, constitutes described piston (3) mechanism.
7. down-hole string internal cutter as claimed in claim 6, it is characterised in that be provided with sealing member between described annular boss and described cutter seat (6.2) inwall.
8. down-hole string internal cutter as claimed in claim 6, it is characterised in that described cutter seat (6.2) is cylindrical hole, and described cutter bod (7) is cylinder.
9. down-hole string internal cutter as claimed in claim 1, it is characterised in that described cutter seat (6.2) inwall is provided with spacing steady nail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620510000.0U CN205778657U (en) | 2016-05-31 | 2016-05-31 | A kind of down-hole string internal cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620510000.0U CN205778657U (en) | 2016-05-31 | 2016-05-31 | A kind of down-hole string internal cutter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205778657U true CN205778657U (en) | 2016-12-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620510000.0U Active CN205778657U (en) | 2016-05-31 | 2016-05-31 | A kind of down-hole string internal cutter |
Country Status (1)
| Country | Link |
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| CN (1) | CN205778657U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107035332A (en) * | 2017-04-21 | 2017-08-11 | 托普威尔石油技术股份公司 | A kind of tubing string internal cutter |
| CN107035333A (en) * | 2017-04-21 | 2017-08-11 | 托普威尔石油技术股份公司 | A kind of down-hole string inner cutter |
-
2016
- 2016-05-31 CN CN201620510000.0U patent/CN205778657U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107035332A (en) * | 2017-04-21 | 2017-08-11 | 托普威尔石油技术股份公司 | A kind of tubing string internal cutter |
| CN107035333A (en) * | 2017-04-21 | 2017-08-11 | 托普威尔石油技术股份公司 | A kind of down-hole string inner cutter |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |