CN204459495U - The heat-resisting liner composite plastic pipe of a kind of deep-well oil-extraction - Google Patents
The heat-resisting liner composite plastic pipe of a kind of deep-well oil-extraction Download PDFInfo
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- CN204459495U CN204459495U CN201520053467.2U CN201520053467U CN204459495U CN 204459495 U CN204459495 U CN 204459495U CN 201520053467 U CN201520053467 U CN 201520053467U CN 204459495 U CN204459495 U CN 204459495U
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- Prior art keywords
- crosslinked polyethylene
- organosilane crosslinked
- plastic pipe
- heat
- deep
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Abstract
The utility model relates to the heat-resisting liner composite plastic pipe of a kind of deep-well oil-extraction, described liner composite plastic pipe is three-layer composite structure plastic tube, comprising: organosilane crosslinked polyethylene internal layer, organosilane crosslinked polyethylene skin and the II type heat-proof polythene mesosphere arranged between organosilane crosslinked polyethylene internal layer and organosilane crosslinked polyethylene skin; Organosilane crosslinked polyethylene internal layer, II type heat-proof polythene mesosphere and organosilane crosslinked polyethylene skin are by the once-through of multi-layer piping co-extrusion technology.This deep-well oil-extraction mesosphere of heat-resisting liner composite plastic pipe adopts II type heat-proof polythene, substantially increase the Anti-pressure under temperature tolerance and high temperature and barrier, be specially adapted to the liner composite oil pipe that high temperature crude oil adopted by deep-well, during construction, the skin of composite plastic pipe has scratch resistant performance simultaneously, ensures that conduit running is more safe and reliable.
Description
Technical field
The utility model relates to liner composite plastic pipe technical field, particularly the heat-resisting liner composite plastic pipe of a kind of deep-well oil-extraction.
Background technique
Well recovery pipe is steel pipe substantially, is faced with the problem of burn into perforation, eccentric wear, wax deposition for many years always, has become the main cause affecting these oil gas fields and normally produce.This corrosion is mainly due to the high-moisture percentage in crude oil, and the Korrosionsmedium contained in associated water in crude oil and rock gas, as H
2s, CO
2deng.Each oil field have employed different anti-corrosion measures according to own situation, through overtesting with facts have proved, plastic lining pipeline is a kind of well method, this method of construction is simple, reliable performance, cost is only and more renews about 50% of pipeline, and this technology facilitates the application of inner lining plastic tube.
Current inner lining plastic tube often adopts common PE or super high molecular weight PE tubing, and PE tubing has the features such as corrosion-resistant, inner wall smooth.But common PE pipeline poor heat resistance, Long-Time Service temperature is only less than 40 DEG C, and super high molecular weight PE serviceability temperature is below 60 DEG C.Under real well in oil recovery process, downhole temperature improves along with the increase of the degree of depth of well depth, and count from ground normal temperature, well depth often increases by 30 meters, and temperature improves about 1 DEG C, and as 2500 meters of deep-well temperature can reach about 95 DEG C, and the darker temperature in down-hole is higher.Common PE and super high molecular weight PE tubing are under the condition of high temperature, and tubing occurs swelling, and the tubing after swelling reduces the barrier property to chemical substance, loses original anti-corrosion function.Especially, after a period of time stopped transport by pipeline, there is creep and recover in the internal lining pipe after swelling, size diminishes, be combined with steel pipe and occur gap or protuberance, at this time oil recovery piston may block whole pipeline because resistance strengthens, and causes shut-down (breakdown) mainteance, causes very large cost to waste.The high temperature swelling problem of PE or super high molecular weight PE tubing, have impact on original anticorrosion, eccentric abrasion prevention function, reduces pipe safety and working life.
II type heat-proof polythene (PE-RT II type) still can Long-Time Service under 90 ~ 95 DEG C of high-temperature-hot-water conditions, there is good bearing capacity under the high temperature conditions, and PE-RT material has good toughness, along with the oil recovery well degree of depth increases and the rising of temperature and pressure, self adaption oil temperature changes and STRESS VARIATION causes oil pipe extension can be out of shape and still ensure the sealing of bushing pipe and steel oil pipe end.So II type heat-proof polythene has the potential quality as deep-well oil-extraction inner lining plastic tube.
Model utility content
The purpose of this utility model is, the heat-resisting liner composite plastic pipe of deep-well oil-extraction of the depth of falling well provide a kind of for the deficiencies in the prior art and improve integrated piping heat resisting temperature, significantly improving pipeline.
To achieve these goals, the technological scheme that the utility model adopts is as follows: the heat-resisting liner composite plastic pipe of a kind of deep-well oil-extraction, described liner composite plastic pipe is three-layer composite structure plastic tube, comprising: organosilane crosslinked polyethylene skin, organosilane crosslinked polyethylene internal layer and the II type heat-proof polythene mesosphere arranged between organosilane crosslinked polyethylene internal layer and organosilane crosslinked polyethylene skin; Organosilane crosslinked polyethylene internal layer, II type heat-proof polythene mesosphere and organosilane crosslinked polyethylene skin are by the once-through of multi-layer piping co-extrusion technology.
Described organosilane crosslinked polyethylene is outer, the Thickness Ratio of II type heat-proof polythene mesosphere and organosilane crosslinked polyethylene internal layer is 1:6:3.
The beneficial effects of the utility model are, this deep-well oil-extraction mesosphere of heat-resisting liner composite plastic pipe adopts II type heat-proof polythene, while the original PE of maintenance or super high molecular weight PE liner tubing advantage, substantially increase the Anti-pressure under temperature tolerance and high temperature and barrier, be specially adapted to the liner composite oil pipe that high temperature crude oil adopted by deep-well, during construction, the skin of composite plastic pipe has scratch resistant performance simultaneously, ensures that conduit running is more safe and reliable.
Accompanying drawing explanation
Fig. 1 is the cross-sectional structure schematic diagram of deep-well oil-extraction with heat-resisting liner composite plastic pipe.
Above-mentioned number in the figure is described as follows:
1---organosilane crosslinked polyethylene is outer; 2---II type heat-proof polythene mesosphere; 3---organosilane crosslinked polyethylene internal layer.
Embodiment
The technical solution of the utility model is described further by specific embodiment below in conjunction with accompanying drawing.
The heat-resisting liner composite plastic pipe of a kind of deep-well oil-extraction, described liner composite plastic pipe is three-layer composite structure plastic tube, comprising: organosilane crosslinked polyethylene skin 1, organosilane crosslinked polyethylene internal layer 3 and the II type heat-proof polythene mesosphere 2 arranged between organosilane crosslinked polyethylene internal layer 3 and organosilane crosslinked polyethylene skin 1; Organosilane crosslinked polyethylene internal layer 3, II type heat-proof polythene mesosphere 2 and organosilane crosslinked polyethylene outer 1 are by the once-through of multi-layer piping co-extrusion technology.
This deep-well oil-extraction with heat-resisting liner composite plastic pipe due to internal layer be transferring oil use, need eccentric abrasion prevention, Wax proofing and heat-resisting effect, therefore organosilane crosslinked polyethylene internal layer 3 and II type heat-proof polythene mesosphere 2 thickness is increased, in the total thickness of this pipe for 100%, organosilane crosslinked polyethylene internal layer 3 thickness is 30% of overall wall thickness, II type heat-proof polythene mesosphere 2 thickness is 60% of overall wall thickness, and outer 1 thickness of organosilane crosslinked polyethylene is 10% of overall wall thickness.
Manufacture this liner composite plastic pipe that external diameter is D77, overall wall thickness is 4.0mm, and internal layer is eccentric abrasion prevention, Wax proofing, resistant to elevated temperatures organosilane crosslinked polyethylene, and thickness is 1.2mm, and heatproof can reach 110 DEG C; The II type heat-proof polythene tube material that mesosphere is heat-resisting, anti-aging, toughness is good, thickness is 2.4mm; Skin is organosilane crosslinked polyethylene, and thickness is 0.4mm, plays the effect of damage resistant protective layer.
With desirable embodiment of the present utility model for enlightenment, by above-mentioned description, various equivalent modifications in the scope not departing from the utility model technological thought, can carry out various change and amendment completely.Technical scope of the present utility model is not limited to the content on specification, must determine its technical scope according to Claims scope.
Claims (2)
1. the heat-resisting liner composite plastic pipe of deep-well oil-extraction, it is characterized in that, described liner composite plastic pipe is three-layer composite structure plastic tube, comprising: organosilane crosslinked polyethylene skin (1), organosilane crosslinked polyethylene internal layer (3) and the II type heat-proof polythene mesosphere (2) arranged between organosilane crosslinked polyethylene internal layer (3) and organosilane crosslinked polyethylene skin (1); Organosilane crosslinked polyethylene internal layer (3), II type heat-proof polythene mesosphere (2) and organosilane crosslinked polyethylene skin (1) are by the once-through of multi-layer piping co-extrusion technology.
2. the heat-resisting liner composite plastic pipe of deep-well oil-extraction according to claim 1, it is characterized in that, the Thickness Ratio of described organosilane crosslinked polyethylene skin (1), II type heat-proof polythene mesosphere (2) and organosilane crosslinked polyethylene internal layer (3) is 1:6:3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520053467.2U CN204459495U (en) | 2015-01-26 | 2015-01-26 | The heat-resisting liner composite plastic pipe of a kind of deep-well oil-extraction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520053467.2U CN204459495U (en) | 2015-01-26 | 2015-01-26 | The heat-resisting liner composite plastic pipe of a kind of deep-well oil-extraction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204459495U true CN204459495U (en) | 2015-07-08 |
Family
ID=53666379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520053467.2U Expired - Fee Related CN204459495U (en) | 2015-01-26 | 2015-01-26 | The heat-resisting liner composite plastic pipe of a kind of deep-well oil-extraction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204459495U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109057723A (en) * | 2018-08-07 | 2018-12-21 | 河北华北石油荣盛机械制造有限公司 | A kind of core layer foaming complex heat-preservation abrasion-proof oil conduit |
-
2015
- 2015-01-26 CN CN201520053467.2U patent/CN204459495U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109057723A (en) * | 2018-08-07 | 2018-12-21 | 河北华北石油荣盛机械制造有限公司 | A kind of core layer foaming complex heat-preservation abrasion-proof oil conduit |
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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: 20150708 Termination date: 20160126 |