CN205823223U - A kind of well head annular space sealing device - Google Patents
A kind of well head annular space sealing device Download PDFInfo
- Publication number
- CN205823223U CN205823223U CN201620653334.3U CN201620653334U CN205823223U CN 205823223 U CN205823223 U CN 205823223U CN 201620653334 U CN201620653334 U CN 201620653334U CN 205823223 U CN205823223 U CN 205823223U
- Authority
- CN
- China
- Prior art keywords
- sealing ring
- urceolus
- annular space
- inner core
- well head
- 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
This utility model relates to petroleum gas and is drilled well technical field, particularly to a kind of well head annular space sealing device.External screw thread all it is machined with on the urceolus upper and lower two ends outer wall of this device, urceolus is sleeved on outside inner core, threaded on the inwall of urceolus upper end have clamping nut, clamping nut is machined with groove on upper surface, clamping nut lower end is against on upper sealing ring, upper sealing ring, multiple packing units, lower sealing ring are the most sequentially arranged between urceolus and inner core in annular space, all by sealing between installation sealing ring and inner core, urceolus on the inside and outside wall of upper sealing ring and lower sealing ring.This utility model achieves and can effectively insulate annular space between production casing and protective casing, blocks and alters on natural gas, and simple to operate, safe and reliable, operating expenses is low, to reduce the well head annular space risk with issue handling with pressure.
Description
Technical field:
This utility model relates to petroleum gas and is drilled well technical field, particularly to a kind of well head annular space sealing device.
Background technology:
In the Oil/gas Well that high pressure high gas rate well and shallow gas are grown, due to cementing quality is the best or by later stage operation,
Layer load changes and the impact of formation fluid corrosion etc., and cement sheath packing was lost efficacy, production casing and protective casing (or top layer set
Pipe) annular space occur altering on natural gas, cause well head annular space with pressure, give produce and maintenance bring major hidden danger and security risk.
At present with pressure for eliminating annular space between sleeve pipe, the Main Preventive Measures taked includes improving well cementation displacement efficiency, suitable
Well shaft fixing technology, improve cement slurry property, increase external packer of pipe etc., in the hope of reaching effective Inter-zonal packing.But by stratum
The restriction of the factors such as multiple pressure regime, execution conditions, down-hole pressure and variations in temperature and impact, between sleeve pipe, annular space can not be effective
Long-term packing, and complicated construction technique, cost are high.
Occurring between sleeve pipe after annular space problem with pressure, conventional means to save the situation is by production casing perforation, then water squeezing
Mudding blocks up fluid-channeling channel.But cement squeeze work exist field conduct difficulty greatly, costly, the problem such as success rate is low.
Utility model content:
The technical problems to be solved in the utility model is to provide a kind of well head annular space sealing device, and the arrangement achieves can
Effectively annular space between packing production casing and protective casing, blocks and alters on natural gas, simple to operate, safe and reliable, operating expenses
Low, to reduce the well head annular space risk with issue handling with pressure.Overcome existing squeeze method closure fluid-channeling channel operation field real
Execute difficulty greatly, costly, low success rate of deficiency.
Technical solution adopted in the utility model is: a kind of well head annular space sealing device, including urceolus and inner core；Urceolus
All being machined with external screw thread on the outer wall of two ends up and down, urceolus is sleeved on outside inner core, and threaded on the inwall of urceolus upper end have compression
Nut, clamping nut upper surface is machined with groove, and clamping nut lower end is against on upper sealing ring, upper sealing ring, multiple packing
Unit, lower sealing ring are the most sequentially arranged between urceolus and inner core in annular space, upper sealing ring and lower sealing ring inside and outside
All sealing between sealing ring and inner core, urceolus by installing on wall, packing units can when by downward extruding force
Expanded radially, is provided with support ring between adjacent two packing units, and lower sealing ring lower end is against holding on urceolus lower end inner wall
On saddle rank.
Upper sealing ring upper end inwall is designed to the positive conical surface.
Lower sealing ring lower end inner wall is designed to inverted cone surface.
The beneficial effects of the utility model are: this utility model can effectively insulate ring between production casing and protective casing
Sky, blocks and alters on natural gas, and simple to operate, safe and reliable, operating expenses is low, with pressure and issue handling to reduce well head annular space
Risk.
Accompanying drawing illustrates:
The utility model is described in more detail with detailed description of the invention below in conjunction with the accompanying drawings.
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the top view of clamping nut.
Detailed description of the invention:
As shown in Figure 1 and Figure 2, a kind of well head annular space sealing device, including urceolus 1 and inner core 9；Urceolus about 1 two ends outer wall
On be all machined with external screw thread, urceolus 1 is sleeved on outside inner core 9, and urceolus 1 upper end inwall is provided with dextrorotation female thread, with clamping nut 2
Dextrorotation external screw thread be connected.The groove 10 for thread screw, clamping nut 2 times it is machined with on clamping nut 2 upper surface
End is against on upper sealing ring 3, and upper sealing ring 3, multiple packing units 5, lower sealing ring 7 are the most sequentially arranged on urceolus 1 and
Between inner core 9 in annular space, all by installing sealing ring 4 and inner core 9, urceolus 1 on the inside and outside wall of upper sealing ring 3 and lower sealing ring 7
Between seal, packing units 5 when by downward extruding force can expanded radially, between packing inner core 9 and urceolus 1
Annular space.Being provided with support ring 6 between adjacent two packing units 5, lower sealing ring 7 lower end is against on urceolus 1 lower end inner wall
Support step 8 on.Upper sealing ring 3 upper end inwall is designed to the positive conical surface.Lower sealing ring 7 lower end inner wall is designed to inverted cone surface.
During work, clamping nut 2 is connected with the dextrorotation screw-internal thread fit of urceolus 1, by groove 10 by dextrorotation external screw thread
Turning clockwise, clamping nut 2 constantly moves down, and applies active force in upper sealing ring 3, packing units 5, support ring 6 and lower seal
Ring 7.The support step 8 of urceolus 1 plays support effect, stops lower sealing ring 7 to move downward, thus compression packing unit 5 makes its footpath
To expansion, form the primary seal of annular space between urceolus 1 and inner core 9, simultaneously the sealing in upper sealing ring 3 and lower sealing ring 7 groove
Enclose 4 auxiliary seals, reach the effect that Multiple Combination seals, effective blocking-up natural gas alters passage, thus reduces because of well cementation
Quality is the best or cement sheath insulates the well head annular space caused that the lost efficacy risk with issue handling with pressure.
It is understood that above with respect to specific descriptions of the present utility model, be merely to illustrate this utility model and not
It is limited to the technical scheme described by this utility model embodiment, it will be understood by those within the art that, the most permissible
This utility model is modified or equivalent, to reach identical technique effect；Needs are used, all in this reality as long as meeting
Within novel protection domain.
Claims (3)
1. a well head annular space sealing device, including urceolus (1) and inner core (9)；It is characterized in that: outside urceolus (1) two ends up and down
All being machined with external screw thread on wall, urceolus (1) is sleeved on inner core (9) outside, and threaded on the inwall of urceolus (1) upper end have compression spiral shell
Cap (2), clamping nut (2) upper surface is machined with groove (10), and clamping nut (2) lower end is against on upper sealing ring (3), upper close
Seal ring (3), multiple packing units (5), lower sealing ring (7) are the most sequentially arranged on annular space between urceolus (1) and inner core (9)
In, on the inside and outside wall of upper sealing ring (3) and lower sealing ring (7) all by install sealing ring (4) and inner core (9), urceolus (1) it
Between seal, packing units (5) when by downward extruding force can expanded radially, adjacent two packing units (5) it
Between support ring (6) is installed, lower sealing ring (7) lower end is against on the support step (8) on urceolus (1) lower end inner wall.
2. according to the well head annular space sealing device described in claim 1, it is characterised in that: described upper sealing ring (3) upper end inwall
It is designed to the positive conical surface.
3. according to the well head annular space sealing device described in claim 1, it is characterised in that: described lower sealing ring (7) lower end inner wall
It is designed to inverted cone surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620653334.3U CN205823223U (en) | 2016-06-28 | 2016-06-28 | A kind of well head annular space sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620653334.3U CN205823223U (en) | 2016-06-28 | 2016-06-28 | A kind of well head annular space sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205823223U true CN205823223U (en) | 2016-12-21 |
Family
ID=58146716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620653334.3U Expired - Fee Related CN205823223U (en) | 2016-06-28 | 2016-06-28 | A kind of well head annular space sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205823223U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107116120A (en) * | 2017-05-18 | 2017-09-01 | 遵义市贝康实业有限公司 | A kind of high velocity ram machine and its process for stamping for being used to produce automobile connector |
| CN114427372A (en) * | 2020-09-09 | 2022-05-03 | 中国石油化工股份有限公司 | Automatic annular sealing device |
| CN115680542A (en) * | 2021-07-22 | 2023-02-03 | 中国石油天然气集团有限公司 | Leakage-proof device, gas channeling-proof device and well cementing device |
-
2016
- 2016-06-28 CN CN201620653334.3U patent/CN205823223U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107116120A (en) * | 2017-05-18 | 2017-09-01 | 遵义市贝康实业有限公司 | A kind of high velocity ram machine and its process for stamping for being used to produce automobile connector |
| CN107116120B (en) * | 2017-05-18 | 2019-04-26 | 日照润增机械有限公司 | It is a kind of for producing the high velocity ram machine and its process for stamping of automobile connector |
| CN114427372A (en) * | 2020-09-09 | 2022-05-03 | 中国石油化工股份有限公司 | Automatic annular sealing device |
| CN114427372B (en) * | 2020-09-09 | 2024-05-24 | 中国石油化工股份有限公司 | Automatic annular sealing device |
| CN115680542A (en) * | 2021-07-22 | 2023-02-03 | 中国石油天然气集团有限公司 | Leakage-proof device, gas channeling-proof device and well cementing device |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161221 Termination date: 20170628 |