CN201650189U - Double-stage sealing device - Google Patents
Double-stage sealing device Download PDFInfo
- Publication number
- CN201650189U CN201650189U CN2010201756206U CN201020175620U CN201650189U CN 201650189 U CN201650189 U CN 201650189U CN 2010201756206 U CN2010201756206 U CN 2010201756206U CN 201020175620 U CN201020175620 U CN 201020175620U CN 201650189 U CN201650189 U CN 201650189U
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- sealing
- thread bush
- outside
- central tube
- inboard
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Abstract
The utility model relates to the technical field of oil-gas well drilling tool sealing devices, in particular to a double-stage sealing device. The double-stage sealing device comprises an upper joint, a sealing sleeve, a thread sleeve, a lower shaft sleeve and a central pipe; the inner side of the lower end of the upper joint is fixedly assembled together with the outer side of the upper end of the central pipe; the outside diameter of the upper joint is greater than that of the central pipe; the central pipe below the upper joint is provided with a first step, a second step and a third step, the outside diameters of which are enlarged in turn; the inner side of the sealing sleeve is arranged on the first step; at least one first O-shaped sealing ring is arranged between the sealing sleeve and the first step; and the inner side of the thread sleeve is positioned in the second step, the middle outer side of the thread sleeve is provided with a lug boss, and the outer side of the lower end of the thread sleeve is fixedly assembled together with the inner side of the upper end of the lower shaft sleeve through threads. The double-stage sealing device has reasonable and compact structure and convenient use, and ensures the effective sealing of a main oil cavity by adopting double-stage sealing so as to greatly improve the sealing safety.
Description
One, technical field
The utility model relates to oil gas well drilling power tool sealing device technical field, is a kind of sealing arrangement in two stages.
Two, background technology
In the research and development design process of novel drilling tool and in the oil gas well drilling process, often face the problem of downhole tool seal failure, it is of common occurrence that seal failure causes researching and developing the phenomenon that designs failure, severe patient will cause drillng operation to carry out smoothly, particularly aspect rotatory sealing, whether rotatory sealing is normal, will directly cause the success or failure of drillng operation.
Three, summary of the invention
The utility model provides a kind of sealing arrangement in two stages, has overcome the deficiency of above-mentioned prior art, and it can effectively solve the problem of the easy seal failure of downhole tool.
The technical solution of the utility model realizes by following measure: a kind of sealing arrangement in two stages comprises top connection, sealing shroud, thread bush, Lower shaft sleeve and central tube; The inboard outside, upper end with central tube, the lower end of top connection is fixedly installed togather, the external diameter of top connection is greater than the external diameter of central tube, there is external diameter to become big first step, second step and the 3rd step in regular turn on the central tube of top connection below, the installed inside of sealing shroud is equipped with first O-ring seals of at least one between sealing shroud and first step on first step; The inboard of thread bush is positioned at second step, there is boss in the outside, middle part of thread bush, the outside, lower end of thread bush is fixedly installed togather by screw thread with the inboard, upper end of Lower shaft sleeve, second O-ring seals of at least one is installed between the inboard, upper end of the outside, thread bush lower end and Lower shaft sleeve, first combination seal of at least one is installed between thread bush and central tube; There is the sealing plush copper in the outside, lower end at sealing shroud, and the lower end of sealing plush copper holds out against on the upper end of the boss of thread bush; Second combination seal of at least one is installed between the outside of inboard that seals plush copper and thread bush.
Be further optimization and/or improvements below to above-mentioned utility model technical scheme:
Between above-mentioned the 3rd step, Lower shaft sleeve and the thread bush main oil pocket can be arranged, first oil filler point L-shaped and that be connected with main oil pocket is arranged in thread bush, on first oil filler point, be installed with first sealing bolt, between sealing shroud, second step and sealing plush copper, auxiliary oil pocket is arranged, second oil filler point L-shaped and that be connected with auxiliary oil pocket is arranged in sealing shroud, on second oil filler point, be installed with second sealing bolt.
Above-mentioned first O-ring seals can be two.
Above-mentioned second O-ring seals can be two.
Above-mentioned first combination seal can be three.
Above-mentioned second combination seal can be one.
The inboard outside, upper end with central tube, the lower end of above-mentioned top connection can be fixedly installed togather by screw thread.
The utility model reasonable and compact in structure, easy to use, by adopting bipolar sealing, thereby guaranteed effective sealing of main oil pocket, therefore greatly improved the safety of sealing.
Four, description of drawings
Accompanying drawing 1 is looked the half section structural representation for the master of the utility model most preferred embodiment.
Coding in the accompanying drawing is respectively: 1 is top connection, and 2 is sealing shroud, and 3 is thread bush, 4 is Lower shaft sleeve, and 5 is central tube, and 6 is first O-ring seals, 7 is boss, and 8 is second O-ring seals, and 9 is first combination seal, 10 are the sealing plush copper, and 11 is second combination seal, and 12 is main oil pocket, 13 is first oil filler point, and 14 is first sealing bolt, and 15 is second oil filler point, 16 is second sealing bolt, and 17 are auxiliary oil pocket.
Five, the specific embodiment
The utility model is not subjected to the restriction of following embodiment, can determine concrete embodiment according to the technical solution of the utility model and actual conditions.
Below in conjunction with embodiment and accompanying drawing the utility model is further described:
As shown in Figure 1, this sealing arrangement in two stages comprises top connection 1, sealing shroud 2, thread bush 3, Lower shaft sleeve 4 and central tube 5; The inboard outside, upper end with central tube 5, the lower end of top connection 1 is fixedly installed togather, the external diameter of top connection 1 is greater than the external diameter of central tube 5, there is external diameter to become big first step, second step and the 3rd step in regular turn on the central tube 5 of top connection 1 below, the installed inside of sealing shroud 2 is equipped with first O-ring seals 6 of at least one between sealing shroud 2 and first step on first step; The inboard of thread bush 3 is positioned at second step, there is boss 7 in the outside, middle part of thread bush 3, the outside, lower end of thread bush 3 is fixedly installed togather by screw thread with the inboard, upper end of Lower shaft sleeve 4, second O-ring seals 8 of at least one is installed between the inboard, upper end of the outside, thread bush 3 lower ends and Lower shaft sleeve 4, first combination seal 9 of at least one is installed between thread bush 3 and central tube 5; There is sealing plush copper 10 in the outside, lower end at sealing shroud 2, and the lower end of sealing plush copper 10 holds out against on the upper end of the boss 7 of thread bush 3; Second combination seal 11 of at least one is installed between the outside of inboard that seals plush copper 10 and thread bush 3.
Can according to actual needs above-mentioned sealing arrangement in two stages be made further optimization and/or improvements:
As shown in Figure 1, main oil pocket 12 is arranged between the 3rd step, Lower shaft sleeve 4 and the thread bush 3, first oil filler point 13 L-shaped and that be connected with main oil pocket 12 is arranged in thread bush 3, on first oil filler point 13, be installed with first sealing bolt 14, auxiliary oil pocket 17 is arranged between sealing shroud 2, second step and sealing plush copper 10, second oil filler point 15 L-shaped and that be connected with auxiliary oil pocket 17 is arranged in sealing shroud 2, on second oil filler point 15, be installed with second sealing bolt 16.
As shown in Figure 1, according to actual needs, first O-ring seals 6 is two; Second O-ring seals 8 is two, and first combination seal 9 is three, and second combination seal 11 is one.
As shown in Figure 1, for the ease of installing and maintenance, the inboard outside, upper end with central tube 5, the lower end of top connection 1 is fixedly installed togather by screw thread.
Above technical characterictic has constituted most preferred embodiment of the present utility model, and it has stronger compliance and best implementation result, can increase and decrease non-essential technical characterictic according to actual needs, satisfies the demand of different situations.
The use of the utility model most preferred embodiment: before the utility model is gone into well, fill with hydraulic oil by first oil filler point 13 and second oil filler point 15 in main oil pocket 12 and auxiliary oil pocket 17 respectively, first oil filler point 13 and second oil filler point 15 seal with first sealing bolt 14 and second sealing bolt 16 respectively.When the utility model is gone into well operations with drilling tool, because the static seal form that is sealed between sealing shroud 2 and the central tube 5, sealing shroud 2 with and thread bush 3 between be the movable sealing form, and be the movable sealing form between thread bush and 3 central tubes 5, therefore, central tube 5 will drive thread bush 3 rotations.Thread bush 3 and Lower shaft sleeve 4 remain static with respect to central tube 5.During the instrument underground work, if second combination seal 11 lost efficacy, and be full of hydraulic oil in the auxiliary oil pocket 17, because the inside and outside hydraulic pressure of tool system is in equilibrium state, drilling fluid will be difficult to enter drilling tool inside outside the system, thereby guaranteed the cleaning of the hydraulic oil in the main oil pocket 12, guaranteed effective sealing of main oil pocket 12; In like manner, lost efficacy as first combination seal 9, under the balanced action of hydraulic oil, the hydraulic oil in the main oil pocket 12 also is difficult to enter into auxiliary oil pocket in auxiliary oil pocket 17, thereby has guaranteed effective sealing of main oil pocket 12.
Claims (10)
1. a sealing arrangement in two stages is characterized in that comprising top connection, sealing shroud, thread bush, Lower shaft sleeve and central tube; The inboard outside, upper end with central tube, the lower end of top connection is fixedly installed togather, the external diameter of top connection is greater than the external diameter of central tube, there is external diameter to become big first step, second step and the 3rd step in regular turn on the central tube of top connection below, the installed inside of sealing shroud is equipped with first O-ring seals of at least one between sealing shroud and first step on first step; The inboard of thread bush is positioned at second step, there is boss in the outside, middle part of thread bush, the outside, lower end of thread bush is fixedly installed togather by screw thread with the inboard, upper end of Lower shaft sleeve, second O-ring seals of at least one is installed between the inboard, upper end of the outside, thread bush lower end and Lower shaft sleeve, first combination seal of at least one is installed between thread bush and central tube; There is the sealing plush copper in the outside, lower end at sealing shroud, and the lower end of sealing plush copper holds out against on the upper end of the boss of thread bush; Second combination seal of at least one is installed between the outside of inboard that seals plush copper and thread bush.
2. sealing arrangement in two stages according to claim 1, it is characterized in that main oil pocket is arranged between the 3rd step, Lower shaft sleeve and the thread bush, first oil filler point L-shaped and that be connected with main oil pocket is arranged in thread bush, on first oil filler point, be installed with first sealing bolt, between sealing shroud, second step and sealing plush copper, auxiliary oil pocket is arranged, second oil filler point L-shaped and that be connected with auxiliary oil pocket is arranged in sealing shroud, on second oil filler point, be installed with second sealing bolt.
3. sealing arrangement in two stages according to claim 1 and 2 is characterized in that first O-ring seals is two.
4. sealing arrangement in two stages according to claim 3 is characterized in that second O-ring seals is two.
5. sealing arrangement in two stages according to claim 4 is characterized in that first combination seal is three.
6. sealing arrangement in two stages according to claim 5 is characterized in that second combination seal is one.
7. sealing arrangement in two stages according to claim 1 and 2 is characterized in that the inboard outside, upper end with central tube, lower end of top connection is fixedly installed togather by screw thread.
8. sealing arrangement in two stages according to claim 3 is characterized in that the inboard outside, upper end with central tube, lower end of top connection is fixedly installed togather by screw thread.
9. sealing arrangement in two stages according to claim 4 is characterized in that the inboard outside, upper end with central tube, lower end of top connection is fixedly installed togather by screw thread.
10. sealing arrangement in two stages according to claim 6 is characterized in that the inboard outside, upper end with central tube, lower end of top connection is fixedly installed togather by screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201756206U CN201650189U (en) | 2010-04-30 | 2010-04-30 | Double-stage sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201756206U CN201650189U (en) | 2010-04-30 | 2010-04-30 | Double-stage sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201650189U true CN201650189U (en) | 2010-11-24 |
Family
ID=43115421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201756206U Expired - Fee Related CN201650189U (en) | 2010-04-30 | 2010-04-30 | Double-stage sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201650189U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104833463A (en) * | 2015-04-07 | 2015-08-12 | 昆明理工大学 | Plastic inspection well leakage test device and detection method |
| CN104963651B (en) * | 2015-07-29 | 2017-10-10 | 中铁工程装备集团有限公司 | New small aperture anti-spouting device |
| CN109794741A (en) * | 2018-12-24 | 2019-05-24 | 新兴铸管（浙江）铜业有限公司 | Casting machine steel band installing mechanism and casting machine steel band installation method |
-
2010
- 2010-04-30 CN CN2010201756206U patent/CN201650189U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104833463A (en) * | 2015-04-07 | 2015-08-12 | 昆明理工大学 | Plastic inspection well leakage test device and detection method |
| CN104963651B (en) * | 2015-07-29 | 2017-10-10 | 中铁工程装备集团有限公司 | New small aperture anti-spouting device |
| CN109794741A (en) * | 2018-12-24 | 2019-05-24 | 新兴铸管（浙江）铜业有限公司 | Casting machine steel band installing mechanism and casting machine steel band installation method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101124 Termination date: 20160430 |