CN201739699U - Small-diameter oil-gas pipeline refrigeration temporary blocking equipment - Google Patents
Small-diameter oil-gas pipeline refrigeration temporary blocking equipment Download PDFInfo
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- CN201739699U CN201739699U CN2010201347149U CN201020134714U CN201739699U CN 201739699 U CN201739699 U CN 201739699U CN 2010201347149 U CN2010201347149 U CN 2010201347149U CN 201020134714 U CN201020134714 U CN 201020134714U CN 201739699 U CN201739699 U CN 201739699U
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- oil
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- insulation jacket
- heat insulation
- gas pipes
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Abstract
The utility model relates to small-diameter oil-gas pipeline refrigeration temporary blocking equipment, which consists of a heat insulation jacket, a heat insulation material, a protective layer, gas nozzles, a gas guide pipe, soluble support plates, an emulsifier water immobilization layer and a liquid nitrogen bottle, wherein two soluble support plates are positioned in a position with a distance of 200 to 300mm from a welding cutting opening in an oil-gas pipeline, the emulsifier water immobilization layer is clamped between the two support plates, the heat insulation jacket consisting of the protective layer and the heat insulation material is positioned at the emulsifier water immobilization layer part arranged outside the oil-gas pipeline, a gap is reserved between the heat insulation jacket and the oil-gas pipeline, both ends of the heat insulation jacket are bundled and tied by ribbons, two gas nozzles are positioned on the heat insulation jacket and are communicated with the gap reserved between the heat insulation jacket and the oil-gas pipeline, the gas nozzle B is connected with the liquid nitrogen bottle through the gas guide pipe, and the gas nozzle A is communicated with the welding cutting opening through the gas guide pipe. The utility model has the advantages of simple structure, convenient and fast operation, high pressure bearing of 2MPa, effective blockage on contact of residual oil and gas and welding sparks, safe construction, long-time and long-distance cleaning pipeline replacement avoidance and easy cleaning of blocking media after thawing.
Description
Technical field
The utility model relates to a kind of minor diameter oil and gas pipes freeze temporary blocking equipment.
Background technique
Oil and gas pipes is in actual moving process, because requirement of engineering need be implemented fire operations such as welding on oil and gas pipeline.
When getting angry a little away from valve, in order to reduce oil and gas leakage to greatest extent, this adopts local blocking technology in the pipeline often, blocks gas stream, gets angry being with oil gas to get angry to become no oil gas.
In actual mechanical process, be that the main valve of oil and gas pipes is turned off for the common way of the bigger oil and gas pipes of caliber, utilize inert gas (as nitrogen, carbon dioxide) to carry out long-time pipeline purging; By the time inflammable substance (comprises condensate in the oil gas pipe, cut pipeline when rock gas) concentration is less than explosion limit, be in perforate on the tube wall at distance otch one segment distance, from perforate, put into equipment such as machine plugging device or leather bag plugging device, carry out weld job then.Welding procedure finishes the back and takes out plugging device, aperture in the repair welding again.This plugging technology complicated operation also can cause bigger localized stress simultaneously, still has unsafe factor when the repair welding aperture, and for can not be at the minor diameter oil and gas pipes of tube wall perforate, this form of construction work be inapplicable.
At present domestic have the oil and gas pipes sealing agent, but the very low (P＜0.1MP of bearing capacity
a); And the freeze plugging technology is widely used on oil (particularly crude oil) pipeline, directly in pipeline outside effect, do not need long apart from pipeline purging, needn't perforate, shutoff is fast, recovers convenient; But all only limit to liquid-transport pipe-line.
The model utility content
The purpose of this utility model is to provide a kind of minor diameter oil and gas pipes snap frozen stifled temporarily equipment, and the freeze plugging technology of liquid-transport pipe-line is applied to the minor diameter oil and gas pipes.
The stifled temporarily equipment of minor diameter oil and gas pipes snap frozen described in the utility model is to be made of insulation jacket, thermal insulating material, protective layer, valve, air pipe, soluble dunnage, emulsifier water retentive layer and liquid nitrogen bottle;
Two soluble dunnages are positioned at oil and gas pipes apart from welding otch 200-300mm place, and the emulsifier water retentive layer is added in the middle of two soluble dunnages; The insulation jacket that is made of protective layer, thermal insulating material is positioned at the outer emulsifier water retentive layer place of oil and gas pipes; leave the gap between insulation jacket and the oil and gas pipes; tie up with band at the insulation jacket two ends; two valves are positioned on the insulation jacket; be communicated with the gap of leaving between insulation jacket and the oil and gas pipes; valve B is connected with liquid nitrogen bottle with air pipe, and valve A is communicated with the welding incision by air pipe.
Open the liquid nitrogen bottle air valve during welding procedure, import nitrogen, when the solid water emulsifier of emulsifier water retentive layer becomes solid, air pipe is shifted out from the welding incision, implement welding operation, the gap of constantly leaving between insulation jacket and oil and gas pipes when implementing welding operation feeds nitrogen, keeps the freezing state of solid water emulsifier.After welding procedure is finished, between chuck and oil and gas pipes, feed thermal medium according to ambient temperature, or be wound in the freezing position of oil and gas pipes with the heating tape, and make the heating of solid water emulsifier recover original state, discharge with rock gas when treating that oil and gas pipes recovers oil gas and carries.
The solid water emulsifier is by French chalk, latex powder, water, organic phenolic aldehyde, and hydroxyethylcellulose (HEC) is formed, and has stronger water retention, has good sealing property and intensity after freezing, and original body of paste and soluble in water is recovered in the back that thaws.The percentage of Zu Chenging is by weight: French chalk 50-80%, and latex powder 5-10%, organic phenolic aldehyde 2-5%, hydroxyethylcellulose (HEC) 5-10%, all the other components are water.
Advantage of the present utility model is:
1. avoid perforate on the minor diameter oil and gas pipes, improved the Security that oil gas is recovered in the construction back.
2. the bearing capacity height can reach 2MPa, does not need to use medium such as liquid nitrogen long-time, long apart from pipeline purging before the welding.
3. easy-clear after the shutoff medium thaws, convenient to operation.
Description of drawings
Fig. 1 minor diameter oil and gas pipes freeze temporary blocking assembling schematic representation.
Wherein: 1, oil and gas pipes 2, band 3, insulation jacket 4, thermal insulating material 5, protective layer 6, valve A 7, air pipe 8, welding otch 9, soluble dunnage 10, emulsifier water retentive layer 11, valve B 12, air pipe 13, liquid nitrogen bottle
Embodiment
The stifled temporarily equipment of minor diameter oil and gas pipes snap frozen described in the utility model is to be made of insulation jacket 3, thermal insulating material 4, protective layer 5, valve, air pipe, soluble dunnage 9, emulsifier water retentive layer 10 and liquid nitrogen bottle 13;
Two soluble dunnages 9 are positioned at oil and gas pipes 1 apart from welding otch 8200-300mm place, and emulsifier water retentive layer 10 is added in the middle of two soluble dunnages 9; The insulation jacket 3 that is made of protective layer 5, thermal insulating material 4 is positioned at oil and gas pipes 1 outer emulsifier water retentive layer 10 places; leave the gap between insulation jacket 3 and the oil and gas pipes 1; tie up with band 2 at insulation jacket 3 two ends; two valves are positioned on the insulation jacket 3; be communicated with the gap of leaving between insulation jacket 3 and the oil and gas pipes 1; valve B11 is connected with liquid nitrogen bottle 13 with air pipe 12, and valve A6 is communicated with welding otch 8 places by air pipe 7.
Claims (1)
1. a minor diameter oil and gas pipes freeze temporary blocking equipment is made of insulation jacket, thermal insulating material, protective layer, valve, air pipe, soluble dunnage, emulsifier water retentive layer and liquid nitrogen bottle; It is characterized in that:
Two soluble dunnages are positioned at oil and gas pipes apart from welding otch 200-300mm place, and the emulsifier water retentive layer is added in the middle of two soluble dunnages; The insulation jacket that is made of protective layer, thermal insulating material is positioned at the outer emulsifier water retentive layer place of oil and gas pipes; leave the gap between insulation jacket and the oil and gas pipes; tie up with band at the insulation jacket two ends; two valves are positioned on the insulation jacket; be communicated with the gap of leaving between insulation jacket and the oil and gas pipes; valve B is connected with liquid nitrogen bottle with air pipe, and valve A is communicated with the welding incision by air pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201347149U CN201739699U (en) | 2010-03-05 | 2010-03-05 | Small-diameter oil-gas pipeline refrigeration temporary blocking equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201347149U CN201739699U (en) | 2010-03-05 | 2010-03-05 | Small-diameter oil-gas pipeline refrigeration temporary blocking equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201739699U true CN201739699U (en) | 2011-02-09 |
Family
ID=43554974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201347149U Expired - Lifetime CN201739699U (en) | 2010-03-05 | 2010-03-05 | Small-diameter oil-gas pipeline refrigeration temporary blocking equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201739699U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110440085A (en) * | 2019-08-13 | 2019-11-12 | 西南石油大学 | A kind of temporary block apparatus of gathering line liquid nitrogen cryogenics suitable for multi-pipe-diameter |
| CN112676282A (en) * | 2020-11-04 | 2021-04-20 | 中化珠海石化储运有限公司 | Oil product process pipeline treatment method |
-
2010
- 2010-03-05 CN CN2010201347149U patent/CN201739699U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110440085A (en) * | 2019-08-13 | 2019-11-12 | 西南石油大学 | A kind of temporary block apparatus of gathering line liquid nitrogen cryogenics suitable for multi-pipe-diameter |
| CN112676282A (en) * | 2020-11-04 | 2021-04-20 | 中化珠海石化储运有限公司 | Oil product process pipeline treatment method |
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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: 20110209 |