CN202273634U - Sealing structure for pressure test plug of oil well casing - Google Patents
Sealing structure for pressure test plug of oil well casing Download PDFInfo
- Publication number
- CN202273634U CN202273634U CN201120418604XU CN201120418604U CN202273634U CN 202273634 U CN202273634 U CN 202273634U CN 201120418604X U CN201120418604X U CN 201120418604XU CN 201120418604 U CN201120418604 U CN 201120418604U CN 202273634 U CN202273634 U CN 202273634U
- Authority
- CN
- China
- Prior art keywords
- sealing ring
- annular slot
- pressure test
- test plug
- sealing
- 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 - Lifetime
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Abstract
The utility model discloses a sealing structure for a pressure test plug of an oil well casing, which comprises an annular slot and a sealing ring, wherein the annular slot is arranged on an outer wall of the pressure test plug and the sealing ring is matched with the annular slot; the cross section of the annular slot on the pressure test plug has a shape of swallow tail, namely, the annular slot is wide in interior and narrow in exterior; the sealing ring, of which the cross section is shaped as same as the cross section of the annular slot, is embedded in the annular slot; and a sealing pair is formed by the outer surface of the sealing ring and an inner wall matched with a to-be-tested casing. The sealing ring is embedded in the annular slot on the outer wall of the pressure test plug, the mounting position is stable, and even if the pressure test plug and the casing are subjected to an assembling and disassembling operation, the sealing ring is free from rolling in the annular slot, so that the sealing ring is prevented from being damaged, the sealing property and the service life of the sealing structure are efficiently promoted, and the production cost is saved. The sealing structure provided by the utility model is especially suitable for a big-caliber pressure test plug which is frequently assembled and disassembled.
Description
Technical field
The utility model relates to a kind of hermetically-sealed construction, and specifically, the utility model relates to a kind of oil well casing pressure testing plug hermetically-sealed construction.
Background technology
In order to ensure the safety of oil well, sleeve pipe must be made customary experiments of sealing performance before installing.Experiments of sealing performance at first at sleeve pipe to be checked two ends the mouth of pipe fill in dress pressure testing plug respectively, the pressure testing plug that compresses leans on and encircles the outer wall hermetically-sealed construction and internal surface of sleeve pipe is sealed and matched.The pressure testing plug hermetically-sealed construction of prior art is made up of annular groove setting-in O RunddichtringO, and this hermetically-sealed construction is simple, and sealing performance is reliable, can satisfy the pressure testing requirement.Because of the particularity of O type hermetically-sealed construction, O RunddichtringO installation site stability is not enough, and the frequent loading and unloading of pressure testing plug are prone to make the O RunddichtringO in annular groove, to roll, even displacement damages.Although change the sealing performance that pressure testing O RunddichtringO beyond the Great Wall can recover hermetically-sealed construction, increase maintenance load and cost of production.The hermetically-sealed construction of prior art is unfavorable for the production scene construction, is necessary to do further improvement.
The utility model content
The utility model is primarily aimed at the deficiency of existing hermetically-sealed construction rapid wear, and it is reasonable to propose a kind of hermetically-sealed construction, and the seal installation site is stable, the oil well casing pressure testing plug hermetically-sealed construction of good sealing effect and long service life.
The utility model is realized technical goal through following technical proposals.
Oil well casing pressure testing plug hermetically-sealed construction, it by pressure testing beyond the Great Wall on the wall annular groove form with the sealing ring that matches.Its improvements are: said pressure testing beyond the Great Wall on the wall annular groove lateral cross section be dovetail shaped; It is the annular groove inner wide and outer narrow; The sealing ring that the lateral cross section shape is identical is inlaid in the annular groove, and the inwall that the sealing ring external surface matches with sleeve pipe to be checked constitutes sealing pair.
The utility model compared with prior art has following good effect:
1, lateral cross section is that the sealing ring setting-in of dovetail shaped annular groove and identical cross-sectional shape is simple in structure, makes easily;
2, has certain elastic compensating ability, good sealing effect behind the sealing ring pressurized of inner wide and outer narrow;
3, sealing ring is inlaid in pressure testing beyond the Great Wall in the wall circular groove, and the installation site is stable, even when the pressure testing plug loads and unloads with sleeve pipe; Sealing ring can not roll in annular groove; Avoid sealing ring to damage, the sealing performance and the application life of effective lift-off seal structure, thus saved cost of production.
Description of drawings
Fig. 1 is the utility model structural profile sketch map.
Fig. 2 is the local enlarged diagram in Fig. 1 A place.
The specific embodiment
Below in conjunction with Fig. 1 the utility model is described further.
Oil well casing pressure testing plug hermetically-sealed construction shown in the drawings, it is made up of annular groove on pressure testing plug 1 outer wall and the sealing ring 2 that matches.The utility model technological improvement is that the annular groove lateral cross section is a dovetail shaped on said pressure testing plug 1 outer wall, i.e. the annular groove inner wide and outer narrow.The sealing ring 2 that the lateral cross section shape is identical is inlaid in the annular groove, and the inwall that sealing ring 2 external surfaces match with sleeve pipe to be checked constitutes sealing pair.Because of sealing ring 2 is inlaid on pressure testing plug 1 outer wall in the annular groove; The installation site is stable; Even when pressure testing plug 1 and sleeve pipe charge and discharge operations, sealing ring 2 can not roll in annular groove, avoid sealing ring 2 to damage; The sealing performance and the application life of effective lift-off seal structure, thus cost of production saved.
The utility model can be used as the heavy caliber pressure testing plug hermetically-sealed construction of similar sleeve pipe, has similar effect.
Claims (1)
1. oil well casing pressure testing plug hermetically-sealed construction, it is made up of annular groove on pressure testing plug (1) outer wall and the sealing ring (2) that matches; It is characterized in that: the annular groove lateral cross section is a dovetail shaped on said pressure testing plug (1) outer wall; It is the annular groove inner wide and outer narrow; The sealing ring that the lateral cross section shape is identical (2) is inlaid in the annular groove, and the inwall that sealing ring (2) external surface matches with sleeve pipe to be checked constitutes sealing pair.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120418604XU CN202273634U (en) | 2011-10-28 | 2011-10-28 | Sealing structure for pressure test plug of oil well casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120418604XU CN202273634U (en) | 2011-10-28 | 2011-10-28 | Sealing structure for pressure test plug of oil well casing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202273634U true CN202273634U (en) | 2012-06-13 |
Family
ID=46193998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120418604XU Expired - Lifetime CN202273634U (en) | 2011-10-28 | 2011-10-28 | Sealing structure for pressure test plug of oil well casing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202273634U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105798265A (en) * | 2016-05-12 | 2016-07-27 | 科华控股股份有限公司 | Sealing structure for vacuum suction casting sealing cover |
-
2011
- 2011-10-28 CN CN201120418604XU patent/CN202273634U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105798265A (en) * | 2016-05-12 | 2016-07-27 | 科华控股股份有限公司 | Sealing structure for vacuum suction casting sealing cover |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120613 |