CN111980628A - Oil-gas pipe heat insulation protection method for improving temperature of oil-gas wellhead - Google Patents
Oil-gas pipe heat insulation protection method for improving temperature of oil-gas wellhead Download PDFInfo
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- CN111980628A CN111980628A CN202010955397.5A CN202010955397A CN111980628A CN 111980628 A CN111980628 A CN 111980628A CN 202010955397 A CN202010955397 A CN 202010955397A CN 111980628 A CN111980628 A CN 111980628A
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- sucker rod
- heat insulation
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- 238000009413 insulation Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000000576 coating method Methods 0.000 claims abstract description 46
- 239000011248 coating agent Substances 0.000 claims abstract description 43
- 239000007788 liquid Substances 0.000 claims abstract description 39
- 238000005524 ceramic coating Methods 0.000 claims abstract description 33
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 33
- 238000004321 preservation Methods 0.000 claims abstract description 16
- 238000001035 drying Methods 0.000 claims abstract description 14
- 238000005507 spraying Methods 0.000 claims description 13
- 238000001556 precipitation Methods 0.000 claims description 12
- 239000000428 dust Substances 0.000 claims description 6
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 5
- 239000003085 diluting agent Substances 0.000 claims description 3
- 239000003921 oil Substances 0.000 abstract description 32
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 239000003129 oil well Substances 0.000 abstract description 10
- 238000005086 pumping Methods 0.000 abstract description 8
- 238000005406 washing Methods 0.000 abstract description 5
- 239000010779 crude oil Substances 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000004018 waxing Methods 0.000 abstract description 2
- 239000011490 mineral wool Substances 0.000 description 5
- 229920001971 elastomer Polymers 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 239000004814 polyurethane Substances 0.000 description 4
- 229920002635 polyurethane Polymers 0.000 description 4
- 239000005060 rubber Substances 0.000 description 4
- 239000011491 glass wool Substances 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000001993 wax Substances 0.000 description 2
- 244000146553 Ceiba pentandra Species 0.000 description 1
- 241000628997 Flos Species 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B36/00—Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
- E21B36/003—Insulating arrangements
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Thermal Insulation (AREA)
Abstract
The invention belongs to the technical field of heat insulation application of mixed liquid produced in an oil field, and particularly discloses an oil-gas pipe heat insulation protection method for improving the temperature of an oil-gas wellhead. And 2, preparing a hollow liquid ceramic coating heat preservation agent. And 3, primary coating. And 4, coating for two times and coating for three times. And 5, drying the coated sucker rod and assembling. The oil-gas pipe heat insulation protection method for improving the temperature of the oil-gas wellhead has the beneficial effects that: the whole sucker rod is coated with a hollow liquid ceramic coating heat insulating agent with the thickness of 1-4mm, so that the temperature of a liquid outlet of an oil well is increased by about 10-30 ℃, the problems of reducing the viscosity of crude oil, waxing, reducing the load of a pumping unit and underground accidents, reducing the times of heating stations and well washing in an oil transportation pipe network are solved, the production period of the oil well is prolonged, the oil yield is increased, and the production cost of oil exploitation is reduced.
Description
Technical Field
The invention belongs to the technical field of oilfield produced fluid heat insulation application, and particularly relates to an oil-gas pipe heat insulation protection method for improving the temperature of an oil-gas wellhead.
Background
Petroleum plays an important role as a special product in the energy industry in the current national economic structure of China. In China, along with the rolling development of oil fields, produced oil of the oil fields gradually enters a medium-water-content period and a high-water-content period, the loss temperature of the oil wells is reduced more in the process from oil pumping water mixed liquid at the bottom of the wells to the outlet of the wells, the paraffin is easy to deposit in oil pumping pipes, and other factors are serious, particularly in winter, underground accidents, the problem of heat loss in oil gas gathering and transportation pipe networks is serious, and the safety production and production cost of oil extraction are seriously influenced. Generally, in an oil well with the depth of 800 plus 1500 meters, the bottom temperature of the oil well is about 30-60 ℃, the temperature of a liquid outlet of the oil well is about 10-30 ℃, the viscosity of crude oil is increased due to high cooling speed in the oil pumping process, wax is easy to deposit in an oil pumping pipe, the load and underground accidents of an oil pumping unit are increased, the oil yield is reduced, and the well washing times and the oil exploitation production cost are increased.
At present, traditional heat preservation processing mode is to need heat retaining equipment, insulation construction such as rock wool/glass silk cotton + iron sheet for the pipeline, and insulation construction is single, airtight, receive factors influence such as vibrations, dead weight, heat preservation intaking, and the heat preservation disintegrates, subsides, drops, the pipeline heat waste is big, corrodes seriously, and the leak source is difficult for seeking. Due to the fact that the medium is conveyed, the influence of factors such as well washing times is increased, abrasion, corrosion and leakage of equipment and pipelines are caused, even the pipelines are scrapped, and therefore the pipelines need to be repaired or partially replaced. The abrasion and corrosion are one of the main causes of the damage of metal equipment and pipelines in the petroleum industry, greatly reduce the service life and increase the petroleum production cost.
Therefore, based on the problems, the invention provides an oil and gas pipe heat insulation protection method for improving the temperature of an oil and gas wellhead.
Disclosure of Invention
The purpose of the invention is as follows: aiming at the defects in the prior art, the invention aims to provide an oil-gas pipe heat insulation protection method for improving the temperature of an oil-gas well mouth, and the method is characterized in that a hollow liquid ceramic coating heat preservation agent with the thickness of 1-4mm is coated on the whole sucker rod, so that the temperature of a liquid outlet of an oil well is improved by about 10-30 ℃, the problems of reducing the viscosity of crude oil, wax deposition, reducing the load of a pumping unit and downhole accidents, reducing the heating stations and well washing times in an oil transportation pipe network, prolonging the production period of the oil well, increasing the oil yield and reducing the production cost of oil exploitation are solved.
The technical scheme is as follows: the invention relates to an oil-gas pipe heat insulation protection method for improving the temperature of an oil-gas well mouth, which comprises the following steps of 1, pretreating a sucker rod, collecting the sucker rod, and removing rust, oil stain, dust and dirt on the surface of the sucker rod indoors. And 2, preparing a hollow liquid ceramic coating heat insulating agent, and adding a diluent indoors to prepare the hollow liquid ceramic coating heat insulating agent. And 3, coating for one time, namely uniformly spraying the hollow liquid ceramic coating heat-insulating agent prepared in the step 2 on the surface of the sucker rod through airless spraying equipment, a painter's spatula and a brush. And 4, coating for the second time and the third time, and uniformly spraying the hollow liquid ceramic coating heat-insulating agent prepared in the step 2 on the surface of the sucker rod coated for the first time in the step 3 through airless spraying equipment, a painter's spatula and a brush. And 5, drying the coated sucker rod and assembling.
According to the technical scheme, the step 1 is used for treating the sucker rod which is cleaned and then is used for removing rust, oil stains, dust and dirt, so that the phenomenon that the sucker rod is not clean in cleaning is prevented.
A phenomenon.
According to the technical scheme, the step 2 is used for testing the high temperature resistance and the wear resistance of the prepared hollow liquid ceramic coating heat insulating agent.
According to the technical scheme, the thickness of the hollow liquid ceramic coating heat insulating agent coated on the surface of the sucker rod in the step 3 is 1-4 mm.
According to the technical scheme, the thickness of the hollow liquid ceramic coating heat insulating agent coated on the surface of the sucker rod in the second and third steps in the step 4 is 1-4 mm.
According to the technical scheme, the conditions of one-time coating in the step 3 are that the atmospheric temperature is +5 to +35 ℃, the relative humidity is below 80%, the difference between the atmospheric temperature and the dew point is more than 3 ℃, precipitation is the condition that no precipitation phenomenon exists, and the atmospheric state meets the GOST17.2.3.02 standard.
According to the technical scheme, the conditions of two-time coating and three-time coating in the step 4 are that the atmospheric temperature is +5 to +35 ℃, the relative humidity is below 80%, the difference between the atmospheric temperature and the dew point is more than 3 ℃, precipitation is the condition that no precipitation phenomenon exists, and the atmospheric state meets the GOST17.2.3.02 standard.
According to the technical scheme, the time interval between the primary coating in the step 3 and the secondary and tertiary coatings in the step 4 is 5-6 hours, wherein after the primary coating, the drying is carried out at the constant temperature of 20 ℃ until the drying is carried out for 3 grades, then the secondary coating is carried out, and after the drying is carried out at the constant temperature of 20 ℃ until the drying is carried out for 3 grades, the tertiary coating is carried out again.
According to the technical scheme, the thickness of the hollow liquid ceramic coating heat preservation agent on the surface of the sucker rod after the two-time coating and the three-time coating in the step 4 is 1-4 mm.
Compared with the prior art, the oil-gas pipe heat insulation protection method for improving the temperature of the oil-gas wellhead has the beneficial effects that: the whole sucker rod is coated with a hollow liquid ceramic coating heat insulating agent with the thickness of 1-4mm, so that the temperature of a liquid outlet of an oil well is increased by about 10-30 ℃, the problems of reducing the viscosity of crude oil, waxing, reducing the load of a pumping unit and underground accidents, reducing the times of heating stations and well washing in an oil transportation pipe network are solved, the production period of the oil well is prolonged, the oil yield is increased, and the production cost of oil exploitation is reduced.
Drawings
FIG. 1 is a schematic view of a coated rear part assembly structure of the oil and gas pipe heat insulation protection method for increasing the temperature of an oil and gas wellhead;
FIG. 2 is a schematic diagram of a post-coating adhesion test of the oil and gas pipe thermal insulation protection method for increasing the temperature of an oil and gas wellhead.
Detailed Description
The invention is further elucidated with reference to the drawings and the embodiments.
The oil-gas pipe heat insulation protection method for improving the temperature of the oil-gas well head comprises the following steps of 1, pretreating a sucker rod, collecting the sucker rod, and removing rust, oil stain, dust and dirt on the surface of the sucker rod indoors. And 2, preparing a hollow liquid ceramic coating heat insulating agent, and adding a diluent indoors to prepare the hollow liquid ceramic coating heat insulating agent. And 3, coating for one time, namely uniformly spraying the hollow liquid ceramic coating heat-insulating agent prepared in the step 2 on the surface of the sucker rod through airless spraying equipment, a painter's spatula and a brush. And 4, coating for the second time and the third time, and uniformly spraying the hollow liquid ceramic coating heat-insulating agent prepared in the step 2 on the surface of the sucker rod coated for the first time in the step 3 through airless spraying equipment, a painter's spatula and a brush. And 5, drying the coated sucker rod and assembling.
Preferably, the sucker rod cleaned in the step 1 is treated to remove rust, oil stain, dust and dirt, so that the phenomenon of unclean during cleaning is prevented; and 2, testing the high temperature resistance and the wear resistance of the prepared hollow liquid ceramic coating heat insulating agent; and the thickness of the hollow liquid ceramic coating heat preservation agent coated on the surface of the sucker rod in the step 3 is 1-4 mm; and the thickness of the hollow liquid ceramic coating heat preservation agent secondarily coated on the surface of the sucker rod in the step 4 is 1-4 mm; and the conditions of the primary coating in the step 3 are that the atmospheric temperature is +5 to +35 ℃, the relative humidity is less than 80%, the difference between the atmospheric temperature and the dew point is more than 3 ℃, precipitation is the condition that no precipitation phenomenon exists, and the atmospheric state is in accordance with the GOST17.2.3.02 standard; and the conditions of the two-time coating and the three-time coating in the step 4 are that the atmospheric temperature is +5 to +35 ℃, the relative humidity is less than 80%, the difference between the atmospheric temperature and the dew point is more than 3 ℃, precipitation is the condition that no precipitation phenomenon exists, and the atmospheric state meets the GOST17.2.3.02 standard; and the time interval between the primary coating of the step 3 and the secondary and tertiary coatings of the step 4 is 5-6 hours, wherein the primary coating is dried to a level of 3 after drying at a constant temperature of 20 ℃, and then the secondary coating is carried out, and the secondary coating is dried to a level of 3 after drying at a constant temperature of 20 ℃, and then the tertiary coating is carried out (wherein the time interval is 5-6 hours, namely the tertiary coating is carried out after the secondary coating is dried and then is kept stand for 5-6 hours); and the thickness of the hollow liquid ceramic coating heat preservation agent on the surface of the sucker rod after the two-time coating and the three-time coating in the step 4 is 1-4 mm.
Examples
Detection and comparison, in various heat preservation industries, the hollow liquid ceramic coating heat preservation agent can replace traditional rock wool, glass wool, rubber and plastic heat preservation materials and polyurethane heat preservation materials;
coefficient of thermal conductivity:
0.03-0.047W/(m ℃ C.)
Glass silk floss 0.042W/(m degree C)
Rubber plastic 0.034W/(m degree C)
Polyurethane: 0.022W/(m ℃ C.)
Hollow liquid ceramic coating heat insulating agent: 0.001 to 0.0012W/(m ℃).
The physical and chemical properties of the hollow liquid ceramic coating heat preservation agent are as follows:
and (3) experimental detection results: linear elongation: normal temperature (20 ℃) is more than or equal to 200 percent; the working temperature is more than or equal to 100 percent; temperature change stability (aging test): a temperature-changing period is from +60 ℃ (1h) to-40 ℃ (1h), and the period is 80 periods; the sample plate has no appearance and color change, and the experiment is equivalent to the natural environment for 15 years (as shown in figure 2).
According to the oil-gas pipe heat insulation protection method for improving the temperature of the oil-gas well mouth, the heat insulation effect of the hollow liquid ceramic coating heat insulation agent with the thickness of 1-4mm is equivalent to that of rock wool with the thickness of 50-60 mm, and the comprehensive index is superior to that of the traditional rock wool, glass wool, rubber and plastic heat insulation materials and polyurethane heat insulation materials; thermal conductivity coefficient of the hollow liquid ceramic coating heat insulating agent: 0.001-0.0012W/(m ℃), which is superior to the traditional rock wool, glass wool, rubber and plastic heat-insulating materials and polyurethane heat-insulating materials.
The foregoing is only a preferred embodiment of this invention and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the invention and these modifications should also be considered as the protection scope of the invention.
Claims (9)
1. An oil gas pipe heat insulation protection method for improving oil gas wellhead temperature is characterized in that: comprises the following steps of (a) carrying out,
step 1, pretreating a sucker rod, collecting the sucker rod, and removing rust, oil stain, dust and dirt on the surface of the sucker rod indoors;
step 2, preparing a hollow liquid ceramic coating heat insulating agent, adding a diluent indoors to prepare the hollow liquid ceramic coating heat insulating agent, and achieving the spraying requirement;
step 3, primary coating, namely uniformly spraying the hollow liquid ceramic coating heat-insulating agent prepared in the step 2 on the surface of the sucker rod through airless spraying equipment, a painter's spatula and a brush;
step 4, coating for two times and three times, wherein the coating time interval is 5-6 hours each time, and uniformly spraying the hollow liquid ceramic coating heat-insulating agent prepared in the step 2 on the surface of the sucker rod coated for one time in the step 3 through airless spraying equipment, a painter's spatula and a brush;
and 5, drying the coated sucker rod and assembling.
2. The oil and gas pipe heat insulation protection method for improving the temperature of an oil and gas wellhead as claimed in claim 1, characterized in that: step 1 is handled the sucker rod that gets rid of rust stain, oil stain, dust, dirt after wasing, prevents to appear the unclean phenomenon in the sucker rod washs.
3. The oil and gas pipe heat insulation protection method for improving the temperature of an oil and gas wellhead as claimed in claim 1, characterized in that: and 2, testing the high temperature resistance and the wear resistance of the prepared hollow liquid ceramic coating heat insulating agent.
4. The oil and gas pipe heat insulation protection method for improving the temperature of an oil and gas wellhead as claimed in claim 1, characterized in that: the thickness of the hollow liquid ceramic coating heat preservation agent coated on the surface of the sucker rod in the step 3 is 1-4 mm.
5. The oil and gas pipe heat insulation protection method for improving the temperature of an oil and gas wellhead as claimed in claim 1, characterized in that: in the step 4, the thickness of the hollow liquid ceramic coating heat insulating agent coated on the surface of the sucker rod for two or three times is 1-4mm, and the coating time interval is 5-6 hours each time.
6. The oil and gas pipe heat insulation protection method for improving the temperature of an oil and gas wellhead as claimed in claim 1, characterized in that: the conditions of the primary coating in the step 3 are that the atmospheric temperature is +5 to +35 ℃, the relative humidity is less than 80%, the difference between the atmospheric temperature and the dew point is more than 3 ℃, precipitation is the condition that no precipitation phenomenon exists, and the atmospheric state is required to meet the GOST17.2.3.02 standard.
7. The oil and gas pipe heat insulation protection method for improving the temperature of an oil and gas wellhead as claimed in claim 1, characterized in that: the conditions of the two-time coating and the three-time coating in the step 4 are that the time interval of each coating is 5-6 hours, the atmospheric temperature is +5 to +35 ℃, the relative humidity is below 80 percent, the difference between the atmospheric temperature and the dew point is more than 3 ℃, the precipitation is the condition that no precipitation phenomenon exists, and the atmospheric state is in accordance with the GOST17.2.3.02 standard.
8. The oil and gas pipe heat insulation protection method for improving the temperature of an oil and gas wellhead as claimed in claim 1, characterized in that: and the time interval between the primary coating in the step 3 and the secondary and third coatings in the step 4 is 5-6 hours, wherein after the primary coating, the drying is carried out at the constant temperature of 20 ℃ until the drying is in a grade of 3, then the secondary coating is carried out, and after the drying is carried out at the constant temperature of 20 ℃ until the drying is in a grade of 3, the secondary coating is carried out again for three times.
9. The oil and gas pipe heat insulation protection method for improving the temperature of an oil and gas wellhead as claimed in claim 1, characterized in that: the thickness of the hollow liquid ceramic coating heat preservation agent on the surface of the sucker rod after the two-time coating and the three-time coating in the step 4 is 1-4 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010955397.5A CN111980628A (en) | 2020-09-11 | 2020-09-11 | Oil-gas pipe heat insulation protection method for improving temperature of oil-gas wellhead |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010955397.5A CN111980628A (en) | 2020-09-11 | 2020-09-11 | Oil-gas pipe heat insulation protection method for improving temperature of oil-gas wellhead |
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| CN111980628A true CN111980628A (en) | 2020-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010955397.5A Pending CN111980628A (en) | 2020-09-11 | 2020-09-11 | Oil-gas pipe heat insulation protection method for improving temperature of oil-gas wellhead |
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|---|---|---|---|---|
| US4966820A (en) * | 1988-05-06 | 1990-10-30 | Hitachi, Ltd. | Ceramics-coated heat resisting alloy member |
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| CN108442909A (en) * | 2018-04-02 | 2018-08-24 | 王景桐 | Oil extraction system based on insulated tubing, the heat-insulated hollow rod of coating |
-
2020
- 2020-09-11 CN CN202010955397.5A patent/CN111980628A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4966820A (en) * | 1988-05-06 | 1990-10-30 | Hitachi, Ltd. | Ceramics-coated heat resisting alloy member |
| US20020066491A1 (en) * | 1999-07-02 | 2002-06-06 | Lively F. Glenn | Insulated pipe |
| US20020054957A1 (en) * | 2000-08-25 | 2002-05-09 | Svend Johnsen | Paint compositions for coating oil and gas pipes |
| CN101586448A (en) * | 2008-05-23 | 2009-11-25 | 安东石油技术（集团）有限公司 | Production technique and devices for hot spraying alloy coating on polished pumping rod |
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| CN108442909A (en) * | 2018-04-02 | 2018-08-24 | 王景桐 | Oil extraction system based on insulated tubing, the heat-insulated hollow rod of coating |
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Application publication date: 20201124 |