CN204002686U - A kind of float collar with double sealing structure - Google Patents
A kind of float collar with double sealing structure Download PDFInfo
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- CN204002686U CN204002686U CN201420392964.0U CN201420392964U CN204002686U CN 204002686 U CN204002686 U CN 204002686U CN 201420392964 U CN201420392964 U CN 201420392964U CN 204002686 U CN204002686 U CN 204002686U
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- inner core
- urceolus
- sealing
- float collar
- sealing structure
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Abstract
The utility model discloses a kind of float collar with double sealing structure, it comprises: urceolus, and it is hollow, and upper end is provided with fluid inlet, and lower end is provided with fluid issuing, and described urceolus is inwardly extruded with limiting section, and the sidewall of described urceolus is also formed with groove; Inner core, its inner hollow, in the circumferential side wall of the middle part of described inner core, offer inlet opening, bottom offers fluid hole, and described fluid hole is communicated with described fluid issuing, wherein, the upper end of described inner core is arranged with sealing ring and contacts with the limiting section sealing of urceolus by described sealing ring, described inlet opening is communicated with described groove, and the bottom of described inner core is arranged with sealing-plug, and contacts with urceolus sealing by described sealing-plug; Flexible member, its upper end is connected to inner core, and lower end is connected to the bearing that applies precompression to described flexible member; Wherein, described inner core slides along described urceolus, and the upper end of described inner core departs from described limiting section, so that fluid inlet is communicated with described groove.
Description
Technical field
The utility model relates to a kind of petroleum oil well completion instrument, relates in particular to a kind of float collar with double sealing structure.
Background technology
The early stage use of oil field development be retainer ring (block ring) its be called again float collar, its effect is used for controlling the downstream position of plug while being cementing, to guarantee to manage interior cement plug length, prevent that cement paste from flowing backwards.And the complexity of down-hole development environment has determined that the design of float collar will constantly update, just can there is larger promotional value.And existing most of float collar design exists sealing performance poor, prevent not distinct issues of performance that mud flows backwards, and also complex structural designs, make in the course of time whole float collar result of use poor, larger to the quality influence of well drilling and cementing.
Utility model content
The utility model is to solve the problems of the technologies described above to have designed and developed a kind of float collar with double sealing structure, and this float collar reasonable in design, especially has dual Seal Design, has improved the anti-mud refluence performance of float collar, has guaranteed well drilling and cementing quality.
The technical scheme that the utility model provides is:
A float collar with double sealing structure, it comprises:
Urceolus, it is hollow, and upper end is provided with fluid inlet, and lower end is provided with fluid issuing, and described urceolus is inwardly extruded with limiting section, and the sidewall of described urceolus is also formed with groove;
Inner core, its inner hollow, in the circumferential side wall of the middle part of described inner core, offer inlet opening, bottom offers fluid hole, and described fluid hole is communicated with described fluid issuing, wherein, the upper end of described inner core is arranged with sealing ring and contacts with the limiting section sealing of described urceolus by described sealing ring, described inlet opening is communicated with described groove, and the bottom of described inner core is arranged with sealing-plug, and contacts with described urceolus sealing by sealing-plug;
Flexible member, its upper end is connected to described inner core, and lower end is connected to the bearing that applies precompression to described flexible member;
Wherein, described inner core slides along described urceolus, and the upper end of described inner core departs from described limiting section, so that fluid inlet is communicated with described groove.
Preferably, described inlet opening is with respect to the downward-sloping setting of sidewall of described inner core.
Preferably, the upper end of described inner core is taper type.
Preferably, ringwise, described bearing and described urceolus coaxially arrange described bearing.
Preferably, described flexible member is spring.
Preferably, described sealing ring adopts rubber pad.
Preferably, described sealing-plug is made by metal material.
Preferably, described inlet opening is evenly distributed with a plurality of in the circumferential side wall of inner core.
Described in the utility model have the float collar of double sealing structure as the term suggests its maximum advantage is to have double seal design, a kind of soft seal that belongs to rubber pad, another belongs to the hard sealing of metal material, the two mutual cooperation that cooperatively interacts can effectively prevent the mode of cement paste refluence accident, increase the safety of underground construction, guaranteed the quality of well drilling and cementing simultaneously, and due to project organization advantages of simple, application life is longer, has good promotional value.
Accompanying drawing explanation
Fig. 1 is the structural representation with double sealing structure described in the utility model.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail, to make those skilled in the art can implement according to this with reference to manual word.
As shown in Figure 1, the utility model provides a kind of float collar with double sealing structure, and it comprises: urceolus 1, it is hollow, and upper end is provided with fluid inlet 101, and lower end is provided with fluid issuing 102, described urceolus is inwardly extruded with limiting section 103, and the sidewall of described urceolus is also formed with groove 104; Inner core 2, its inner hollow, in the circumferential side wall of the middle part of described inner core, offer inlet opening 201, bottom offers fluid hole, and described fluid hole is communicated with described fluid issuing, wherein, the upper end of described inner core is arranged with sealing ring 3 and contacts with the limiting section sealing of described urceolus by described sealing ring, described inlet opening is communicated with described groove, and the bottom of described inner core is arranged with sealing-plug 4, and contacts with described urceolus sealing by sealing-plug; Flexible member 5, its upper end is connected to described inner core, and lower end is connected to the bearing 6 that applies precompression to described flexible member; Wherein, described inner core slides along described urceolus, and the upper end of described inner core departs from described limiting section, so that fluid inlet is communicated with described groove.
Here, apply hydraulic pressure can to when fluid is come in from described fluid inlet inner core upper end, force inner core to move down along urceolus, and then sealing ring and the limiting section of urceolus are separated, fluid enters into groove, and from groove, enters into the inlet opening of inner core, finally from fluid issuing, goes out.Meeting compression elastic element in this process, and when water filling completes, flexible member can recover original length under the effect of elastic force, and the sealing ring of inner core upper end contacts with the limiting section sealing of urceolus again, has realized soft seal; Sealing-plug also returns to home position under the effect of elastic force simultaneously, contacts with urceolus sealing, also can stop the refluence of fluid, has realized hard sealing.
Referring to Fig. 1, inlet opening described in the utility model, with respect to the downward-sloping setting of sidewall of described inner core, can flow into inner core along flow direction and then the guiding fluid of liquid like this.Meanwhile, described inlet opening is evenly distributed with a plurality of in the circumferential side wall of inner core.
Further, the upper end of described inner core is taper type.
Further, ringwise, described bearing and described urceolus coaxially arrange described bearing.
Further, described flexible member is spring.
Further, described sealing ring adopts rubber pad.
Further, described sealing-plug is made by metal material.
Described in the utility model have the float collar of double sealing structure as the term suggests its maximum advantage is to have double seal design, a kind of soft seal that belongs to rubber pad, another belongs to the hard sealing of metal material, the two mutual cooperation that cooperatively interacts can effectively prevent the mode of cement paste refluence accident, increase the safety of underground construction, guaranteed the quality of well drilling and cementing simultaneously, and due to project organization advantages of simple, application life is longer, has good promotional value.
Although embodiment of the present utility model is open as above, but it is not restricted to listed utilization in manual and embodiment, it can be applied to the various fields of the present utility model that are applicable to completely, for those skilled in the art, can easily realize other modification, therefore do not deviating under the universal that claim and equivalency range limit, the utility model is not limited to specific details and illustrates here and the legend of describing.
Claims (8)
1. a float collar with double sealing structure, is characterized in that, comprising:
Urceolus, it is hollow, and upper end is provided with fluid inlet, and lower end is provided with fluid issuing, and described urceolus is inwardly extruded with limiting section, and the sidewall of described urceolus is also formed with groove;
Inner core, its inner hollow, in the circumferential side wall of the middle part of described inner core, offer inlet opening, bottom offers fluid hole, and described fluid hole is communicated with described fluid issuing, wherein, the upper end of described inner core is arranged with sealing ring and contacts with the limiting section sealing of described urceolus by described sealing ring, described inlet opening is communicated with described groove, and the bottom of described inner core is arranged with sealing-plug, and contacts with described urceolus sealing by sealing-plug;
Flexible member, its upper end is connected to described inner core, and lower end is connected to the bearing that applies precompression to described flexible member;
Wherein, described inner core slides along described urceolus, and the upper end of described inner core departs from described limiting section, so that fluid inlet is communicated with described groove.
2. the float collar with double sealing structure as claimed in claim 1, is characterized in that, described inlet opening is with respect to the downward-sloping setting of sidewall of described inner core.
3. the float collar with double sealing structure as claimed in claim 1, is characterized in that, the upper end of described inner core is taper type.
4. the float collar with double sealing structure as claimed in claim 1, is characterized in that, ringwise, described bearing and described urceolus coaxially arrange described bearing.
5. the float collar with double sealing structure as claimed in claim 1, is characterized in that, described flexible member is spring.
6. the float collar with double sealing structure as claimed in claim 1, is characterized in that, described sealing ring adopts rubber pad.
7. the float collar with double sealing structure as claimed in claim 1, is characterized in that, described sealing-plug is made by metal material.
8. the float collar with double sealing structure as claimed in claim 1, is characterized in that, described inlet opening is evenly distributed with a plurality of in the circumferential side wall of inner core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420392964.0U CN204002686U (en) | 2014-07-16 | 2014-07-16 | A kind of float collar with double sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420392964.0U CN204002686U (en) | 2014-07-16 | 2014-07-16 | A kind of float collar with double sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204002686U true CN204002686U (en) | 2014-12-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420392964.0U Active CN204002686U (en) | 2014-07-16 | 2014-07-16 | A kind of float collar with double sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204002686U (en) |
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2014
- 2014-07-16 CN CN201420392964.0U patent/CN204002686U/en active Active
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |