CN102192382A - Temporary freezing plugging method for small-diameter oil and gas pipeline - Google Patents
Temporary freezing plugging method for small-diameter oil and gas pipeline Download PDFInfo
- Publication number
- CN102192382A CN102192382A CN 201010127461 CN201010127461A CN102192382A CN 102192382 A CN102192382 A CN 102192382A CN 201010127461 CN201010127461 CN 201010127461 CN 201010127461 A CN201010127461 A CN 201010127461A CN 102192382 A CN102192382 A CN 102192382A
- Authority
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- China
- Prior art keywords
- oil
- gas
- gas pipes
- welding
- water emulsifier
- 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.)
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- 230000008014 freezing Effects 0.000 title claims abstract description 14
- 238000007710 freezing Methods 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000007789 gas Substances 0.000 claims abstract description 63
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 31
- 238000003466 welding Methods 0.000 claims abstract description 28
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 22
- 239000007787 solid Substances 0.000 claims abstract description 22
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 21
- 239000004354 Hydroxyethyl cellulose Substances 0.000 claims abstract description 14
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 claims abstract description 14
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 claims abstract description 14
- 239000007788 liquid Substances 0.000 claims abstract description 9
- 239000004816 latex Substances 0.000 claims abstract description 8
- 229920000126 latex Polymers 0.000 claims abstract description 8
- 239000000843 powder Substances 0.000 claims abstract description 8
- 230000000903 blocking effect Effects 0.000 claims abstract description 7
- -1 phenolic aldehyde Chemical class 0.000 claims abstract description 7
- 238000009413 insulation Methods 0.000 claims description 13
- KNXVOGGZOFOROK-UHFFFAOYSA-N trimagnesium;dioxido(oxo)silane;hydroxy-oxido-oxosilane Chemical compound [Mg+2].[Mg+2].[Mg+2].O[Si]([O-])=O.O[Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O KNXVOGGZOFOROK-UHFFFAOYSA-N 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000011810 insulating material Substances 0.000 claims description 4
- 239000011241 protective layer Substances 0.000 claims description 4
- 239000011435 rock Substances 0.000 claims description 4
- 230000008676 import Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 3
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 37
- 238000005516 engineering process Methods 0.000 description 6
- 238000010926 purge Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- XARVANDLQOZMMJ-CHHVJCJISA-N 2-[(z)-[1-(2-amino-1,3-thiazol-4-yl)-2-oxo-2-(2-oxoethylamino)ethylidene]amino]oxy-2-methylpropanoic acid Chemical compound OC(=O)C(C)(C)O\N=C(/C(=O)NCC=O)C1=CSC(N)=N1 XARVANDLQOZMMJ-CHHVJCJISA-N 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 230000005226 mechanical processes and functions Effects 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The invention relates to a freezing temporary plugging method for a small-diameter oil and gas pipeline; injecting the prepared solid-water emulsifier and the soluble support plate push plugs at two sides into a position 200-300mm away from the cut of the oil-gas pipeline; wrapping a heat-insulating jacket on the oil-gas pipeline, wherein the heat-insulating jacket is provided with two gas nozzles, a liquid nitrogen bottle is connected with a gas nozzle B by a gas guide tube, the gas guide tube is connected with a gas nozzle A, the other end of the gas guide tube is connected to a welding cut, and nitrogen is introduced into the oil-gas pipe; continuously introducing nitrogen between the jacket and the oil-gas pipeline during welding operation, maintaining the freezing state of the water-fixing emulsifier, and blocking residual oil gas from contacting welding sparks; after the welding construction is finished, the solid-water emulsifier is heated and recovered to the original state and is discharged; the solid water emulsifier comprises the following components in percentage by weight: 50-80% of talcum powder, 5-10% of latex powder, 2-5% of organic phenolic aldehyde, 5-10% of hydroxyethyl cellulose and the balance of water; the fire safety is improved, and the pressure bearing capacity is up to 2 MPa.
Description
Technical field
The present invention relates to a kind of minor diameter oil and gas pipes freeze temporary blocking method.
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.
Summary of the invention
The object of the present invention is to provide a kind of minor diameter oil and gas pipes snap frozen temporary blocking method, the freeze plugging technology of liquid-transport pipe-line is applied to the minor diameter oil and gas pipes.
The present invention is embodied as:
(1) the soluble dunnage of the solid water emulsifier for preparing and both sides plunger successively is injected into the place apart from oil and gas pipes welding otch 200-300mm.
(2) then the insulation jacket that is made of thermal insulating material and protective layer is wrapped on the oil and gas pipes; leave the gap between insulation jacket and the oil and gas pipes; tie up tightly with band at the insulation jacket two ends; insulation jacket is provided with two valves; with air pipe liquid nitrogen bottle and valve B are coupled together; be connected with valve A with air pipe, the air pipe the other end inserts the welding incision, nitrogen is imported in the oil gas pipe improve freezing efficiency.
(3) open the liquid nitrogen bottle air valve, import nitrogen, when the solid water emulsifier becomes solid, air pipe is shifted out from the welding incision, implement welding operation, when implementing welding operation, constantly between chuck and oil and gas pipes, feed nitrogen, keep the freezing state of solid water emulsifier.
(4) 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.
The invention has the advantages that:
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, dunnage 10, solid water emulsifier 11, valve B 12, air pipe 13, liquid nitrogen bottle
Embodiment
(1) the soluble dunnage 9 of the solid water emulsifier 10 for preparing and both sides plunger successively is injected into the place apart from oil and gas pipes welding otch 200-300mm.
(2) then the insulation jacket 3 that is made of thermal insulating material 4 and protective layer 5 is wrapped on the oil and gas pipes 1; leave the gap between insulation jacket 3 and the oil and gas pipes 1; tie up tightly with band 2 at insulation jacket 3 two ends; insulation jacket 3 is provided with two valves; with air pipe 12 liquid nitrogen bottle 13 and valve B11 are coupled together; be connected with valve A6 with air pipe 7, air pipe 12 the other ends insert welding otch 8 places, nitrogen is imported in the oil gas pipe improve freezing efficiency.
(3) open the liquid nitrogen bottle air valve, import nitrogen, when the solid water emulsifier becomes solid, air pipe is shifted out from the welding incision, implement welding operation, when implementing welding operation, constantly between chuck and oil and gas pipes, feed nitrogen, keep the freezing state of solid water emulsifier.
(4) 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%, and latex powder 10%, organic phenolic aldehyde 5%, hydroxyethylcellulose (HEC) 10%, all the other components are water.
Technology is with embodiment 1.
The solid water emulsifier by the percentage of forming by weight is: French chalk 80%, and latex powder 5%, organic phenolic aldehyde 2%, hydroxyethylcellulose (HEC) 5%, all the other components are water.
Technology is with embodiment 1.
The solid water emulsifier by the percentage of forming by weight is: French chalk 70%, and latex powder 8%, organic phenolic aldehyde 4%, hydroxyethylcellulose (HEC) 8%, all the other components are water.
Claims (1)
1. minor diameter oil and gas pipes freeze temporary blocking method is characterized in that:
(1) the soluble dunnage of the solid water emulsifier for preparing and both sides plunger successively is injected into the place apart from oil and gas pipes welding otch 200-300mm;
(2) then the insulation jacket that is made of thermal insulating material and protective layer is wrapped on the oil and gas pipes, leave the gap between insulation jacket and the oil and gas pipes, tie up tightly with band at the insulation jacket two ends, insulation jacket is provided with two valves, with air pipe liquid nitrogen bottle and valve B are coupled together, be connected with valve A with air pipe, the air pipe the other end inserts the welding incision, nitrogen is imported in the oil gas pipe improve freezing efficiency;
(3) open the liquid nitrogen bottle air valve, import nitrogen, when the solid water emulsifier becomes solid, air pipe is shifted out from the welding incision, implement welding operation, when implementing welding operation, constantly between chuck and oil and gas pipes, feed nitrogen, keep the freezing state of solid water emulsifier;
(4) 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;
Solid water emulsifier percentage composition by weight is: French chalk 50-80%, and latex powder 5-10%, organic phenolic aldehyde 2-5%, hydroxyethylcellulose 5-10%, all the other components are water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101274617A CN102192382B (en) | 2010-03-05 | 2010-03-05 | Temporary freezing plugging method for small-diameter oil and gas pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101274617A CN102192382B (en) | 2010-03-05 | 2010-03-05 | Temporary freezing plugging method for small-diameter oil and gas pipeline |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102192382A true CN102192382A (en) | 2011-09-21 |
| CN102192382B CN102192382B (en) | 2012-11-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101274617A Active CN102192382B (en) | 2010-03-05 | 2010-03-05 | Temporary freezing plugging method for small-diameter oil and gas pipeline |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103899877A (en) * | 2014-03-25 | 2014-07-02 | 西南石油大学 | Temporary blocking method for welding large oil transportation pipelines |
| CN105108445A (en) * | 2015-08-12 | 2015-12-02 | 大唐湘潭发电有限责任公司 | Method for handling high-pressure fire-resistant oil leakage |
| CN105909208A (en) * | 2016-05-26 | 2016-08-31 | 中国农业大学 | Colloid conveying system for freezing temporary plugging of oil field |
| CN106833571A (en) * | 2017-02-28 | 2017-06-13 | 中石化石油工程技术服务有限公司 | A kind of pressure-bearing freeze temporary blocking agent high and preparation method thereof |
| CN107435778A (en) * | 2016-05-27 | 2017-12-05 | 中国石油天然气股份有限公司 | Vertical oil-gas pipeline explosion-proof method |
| CN110886273A (en) * | 2019-12-16 | 2020-03-17 | 上海市堤防（泵闸）设施管理处 | Freezing water-separating type pressurized maintenance water-stopping device |
| CN111636852A (en) * | 2020-04-21 | 2020-09-08 | 中国海洋石油集团有限公司 | Liquid nitrogen freezing device for temporary plugging of oil field |
| CN113124254A (en) * | 2019-12-31 | 2021-07-16 | 中国石油天然气股份有限公司 | Oil and gas pipeline plugging method |
| CN114526397A (en) * | 2022-01-26 | 2022-05-24 | 博澳智慧能源(大连)有限公司 | Pipeline maintenance method and device |
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| US3817271A (en) * | 1971-08-15 | 1974-06-18 | L Roven | Refrigeration by-pass and service valve |
| GB2054041A (en) * | 1979-02-08 | 1981-02-11 | Johal K S | Surge Suppression Device |
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| CN1044327A (en) * | 1988-12-07 | 1990-08-01 | 化工部光明化工研究所 | Liquid-transport pipe-line freeze plugging method and device therefor |
| CN2546718Y (en) * | 2002-05-29 | 2003-04-23 | 宝山钢铁股份有限公司 | Refrigerating apparatus for oil transporting pipeline |
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2010
- 2010-03-05 CN CN2010101274617A patent/CN102192382B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3817271A (en) * | 1971-08-15 | 1974-06-18 | L Roven | Refrigeration by-pass and service valve |
| GB2054041A (en) * | 1979-02-08 | 1981-02-11 | Johal K S | Surge Suppression Device |
| SU1142690A1 (en) * | 1983-06-07 | 1985-02-28 | Всесоюзный Научно-Исследовательский Институт По Сбору,Подготовке И Транспорту Нефти И Нефтепродуктов | Method of shutting off pipeline with petroleum |
| CN1044327A (en) * | 1988-12-07 | 1990-08-01 | 化工部光明化工研究所 | Liquid-transport pipe-line freeze plugging method and device therefor |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103899877A (en) * | 2014-03-25 | 2014-07-02 | 西南石油大学 | Temporary blocking method for welding large oil transportation pipelines |
| CN103899877B (en) * | 2014-03-25 | 2015-12-30 | 西南石油大学 | A kind of oil transportation large pipeline implements the temporary blocking method of welding |
| CN105108445A (en) * | 2015-08-12 | 2015-12-02 | 大唐湘潭发电有限责任公司 | Method for handling high-pressure fire-resistant oil leakage |
| CN105909208A (en) * | 2016-05-26 | 2016-08-31 | 中国农业大学 | Colloid conveying system for freezing temporary plugging of oil field |
| CN107435778A (en) * | 2016-05-27 | 2017-12-05 | 中国石油天然气股份有限公司 | Vertical oil-gas pipeline explosion-proof method |
| CN106833571A (en) * | 2017-02-28 | 2017-06-13 | 中石化石油工程技术服务有限公司 | A kind of pressure-bearing freeze temporary blocking agent high and preparation method thereof |
| CN110886273A (en) * | 2019-12-16 | 2020-03-17 | 上海市堤防（泵闸）设施管理处 | Freezing water-separating type pressurized maintenance water-stopping device |
| CN113124254A (en) * | 2019-12-31 | 2021-07-16 | 中国石油天然气股份有限公司 | Oil and gas pipeline plugging method |
| CN111636852A (en) * | 2020-04-21 | 2020-09-08 | 中国海洋石油集团有限公司 | Liquid nitrogen freezing device for temporary plugging of oil field |
| CN114526397A (en) * | 2022-01-26 | 2022-05-24 | 博澳智慧能源(大连)有限公司 | Pipeline maintenance method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102192382B (en) | 2012-11-14 |
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