CN106907114B - Externally wrapped nano heat-insulating oil pipe - Google Patents
Externally wrapped nano heat-insulating oil pipe Download PDFInfo
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- CN106907114B CN106907114B CN201710316260.3A CN201710316260A CN106907114B CN 106907114 B CN106907114 B CN 106907114B CN 201710316260 A CN201710316260 A CN 201710316260A CN 106907114 B CN106907114 B CN 106907114B
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- oil pipe
- pipe
- heat
- heat insulation
- insulating
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/16—Flanged joints characterised by the sealing means
- F16L23/18—Flanged joints characterised by the sealing means the sealing means being rings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/028—Composition or method of fixing a thermally insulating material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/10—Bandages or covers for the protection of the insulation, e.g. against the influence of the environment or against mechanical damage
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Abstract
The invention discloses an externally wrapped nano heat-insulating oil pipe, which consists of a steel oil pipe, an outer heat-insulating layer of the oil pipe, an outer shaping protecting belt of the heat-insulating layer, an outer protecting pipe of the shaping protecting belt and two butted semicircular heat-insulating pipe shells at the joint operation section of an oil pipe coupling. Uniformly wrapping a heat-insulating layer on the outer wall of the oil pipe at the middle section of the oil pipe, uniformly lapping and winding a heat-insulating layer shaping protecting belt outside the heat-insulating layer, and arranging a heat-insulating oil pipe outer layer protecting pipe outside the shaping protecting belt; displacement-preventing forced sealing devices are arranged at two ends of the middle section of the oil pipe; two butted semicircular heat insulation pipe shells and a trapezoid sealing rubber ring are fixedly arranged at the oil pipe operation section. The invention can effectively reduce the loss of the temperature of the crude oil in the process of lifting the crude oil from the bottom of the well to the top of the well, improve the problems of flow state and wax precipitation of the crude oil in a shaft, finally achieve the purposes of energy conservation and emission reduction, and greatly reduce the petroleum exploitation cost.
Description
Technical Field
The invention relates to an externally wrapped nano heat-insulating oil pipe suitable for an oil production pipe column with less eccentric wear of an oil production well rod pipe of an oil field machine and an underground hot water well pipe column.
Background
At present, a flow transmission mode of pure light pipe column oil extraction (without any oil pipe heat insulation measures) is commonly adopted in the actual production process of an oil field, an underground hot water well column is adopted to extract underground hot water, and the oil extraction and hot water extraction modes have the problems of waste of a large amount of underground natural heat energy and insufficient utilization. When crude oil with high natural temperature in deep level is lifted to a wellhead by mechanical lifting, the crude oil loses a great deal of temperature, so that the crude oil has poor fluidity and wax precipitation in a shaft, the load of a pumping unit is increased, when the load of the pumping unit is severe, the well is washed by hot water, the temperature of the crude oil at the wellhead is increased by electric heating, various chemical viscosity reducers and wax scavengers are added to reduce the viscosity and remove the wax, the production cost of oil extraction is increased, and electric energy and the heat energy of a heating furnace of a ground gathering and transmission system are wasted.
Disclosure of Invention
The invention aims to provide an externally wrapped nano heat-insulating oil pipe, which can effectively reduce the temperature loss of crude oil in the process of flowing from a bottom hole to a wellhead, improve the viscosity, wax precipitation and flow state of the crude oil in a shaft, and realize the increase of the temperature of the crude oil at the original wellhead by 15-30 ℃ in actual production, thereby solving the technical problems of hot washing of an oil well, adding various chemical preventive agents, electric heating and viscosity reduction, reducing the load of an oil pumping unit, saving electricity of the oil well, simplifying the ground gathering and conveying process flow, changing three-pipe heat tracing into single-pipe non-heating normal-temperature conveying, removing a water heater and the like, and really achieving the purposes of saving energy, reducing emission, creating and enhancing effects, and greatly reducing the petroleum exploitation cost.
The technical scheme adopted by the invention is as follows:
the two ends of the oil pipe are threaded sections with external threads, the part close to the threaded sections at the two ends is two operation sections, the part between the two operation sections is a middle section, and the oil pipe is connected with the oil pipe by an oil pipe coupling for use in a well; uniformly wrapping a layer of heat insulation layer (2) on the outer wall of the oil pipe at the middle section of the oil pipe (1), uniformly lapping and winding a heat insulation layer shaping protecting belt (3) on the outer side of the heat insulation layer (2), wrapping the heat insulation layer and the heat insulation layer shaping protecting belt on the outer side of the middle section of the oil pipe, and penetrating the heat insulation layer and the heat insulation layer shaping protecting belt into an outer protection pipe (4) of the heat insulation oil pipe; the two ends of the middle section of the oil pipe (1) are provided with displacement-preventing forced sealing devices which are respectively formed by combining a fixed steel ring (5), a displacement-preventing positioning ring (6), a sealing rubber ring (7) and a reducing section with a certain inclination formed by forced compression of an outer layer protection pipe (4), wherein the fixed steel ring (5), the displacement-preventing positioning ring (6) and the sealing rubber ring are directly sleeved on the oil pipe (1); two butted semicircular heat insulation pipe shells (9) with reinforcing ribs are prefabricated in advance on the periphery of the oil pipe connecting coupling (12) and the operating section, a plurality of pipe shell fastening screws (10) are symmetrically arranged on the two butted semicircular heat insulation pipe shells (9), a gap between the two butted semicircular heat insulation pipe shells and the reinforcing ribs is filled with a heat insulation material (11), and sealing glue (13) is sprayed on the inner surfaces and two end surfaces of the two butted semicircular heat insulation pipe shells along the semicircle after the heat insulation material is filled; a trapezoid sealing rubber ring (8) is arranged between the end part of the middle section of the oil pipe (1) and the end parts of two butted semicircular heat insulation pipe shells (9) at the operating section.
The heat insulation material is sleeved in a waterproof and radiation heat insulation sleeve bag (14) to form a whole, and then uniformly wrapped on the outer side of the oil pipe at the middle section of the oil pipe (1) to form the heat insulation layer (2); the outer side of the heat insulation layer (2) is uniformly lapped and wound with a shaping protective belt (3) which tightly clings and winds the heat insulation layer, and the shaping protective belt (3) is a fiber belt with strong tensile resistance; the outer side of the shaping protecting belt (3) is provided with an outer protecting pipe (4) of the heat insulation protecting oil pipe, and the outer protecting pipe (4) is made of a seamless steel pipe or glass fiber reinforced plastic pipe material.
The heat-insulating material is aerogel nanometer super heat-insulating felt.
The anti-displacement forced sealing device is arranged at two ends of the middle section of the oil pipe (1), the device is characterized in that a fixed steel ring (5) is welded at a set position of the outer wall of the oil pipe, an anti-displacement positioning ring (6) and a sealing rubber ring (7) which are made of reinforced nylon are sleeved on the outer side of the fixed steel ring (5), and finally the outer layer protection pipe (4) and the sealing rubber ring (7) at the position are forced to be compressed to a thinner outer diameter from a thicker outer diameter through hydraulic equipment at the outermost end of the outer layer protection pipe (4), and a reducing section of the outer layer protection pipe with a certain inclination is formed at the end part of the middle section of the oil pipe.
Two butted semicircular heat insulation pipe shells (9) fixed on the tubing coupling and the operation section are manufactured by adopting reinforced nylon materials through an injection molding process; a plurality of groups of reinforcing ribs are arranged in the tube shell; the gaps between the reinforcing ribs are filled with heat insulation materials; and a layer of sealant is sprayed on the inner surfaces and the two end surfaces of the two semicircular heat insulation tube shells.
The trapezoid sealing rubber ring (8) is arranged between the end part of the middle end of the oil pipe (1) and the end parts of the two butted semicircular heat insulation pipe shells (9) at the operation section, and the trapezoid sealing rubber ring (8) is made of nitrile rubber materials.
The invention has the advantages that: the heat energy of the stratum is fully utilized, the heat insulation and heat preservation function of the oil pipe is added on the oil pipe column, so that the loss of the temperature of the crude oil in the process of lifting the crude oil from the higher temperature of the bottom of the well to the wellhead is reduced, the temperature of the crude oil at the well shaft and the wellhead is improved, the viscosity, wax precipitation and flow state of the crude oil in the well shaft are improved, the problems of hot washing of an oil well, adding various chemical preventive agents, electric heating and viscosity reduction, reducing the load of an oil pumping unit, saving electricity of the oil well, simplifying the ground gathering and transportation process flow, changing three-pipe heat tracing into single-pipe non-heating normal temperature transportation, removing a hot water furnace and the like are solved, and the energy conservation, emission reduction, income and efficiency creation and great reduction of the petroleum exploitation cost are truly achieved.
The invention has the following outstanding substantial characteristics:
1. the displacement-preventing forced sealing devices are arranged at the two ends of the heat-insulating oil pipe, and the device successfully solves the sealing problem of the end part of the oil pipe, thereby ensuring that an oil-water mixture in an oil well cannot enter the heat-insulating layer to reduce the heat-insulating effect, and successfully solving the problem that the heat-insulating oil pipe generates dislocation offset between an outer protection pipe and the heat-insulating layer of the oil pipe due to larger friction force generated between the heat-insulating oil pipe and a sleeve in a shaft in the process of lifting and lowering the oil pipe.
2. The outer-layer protection tube (4) of the heat-insulating oil tube is made of a high-density polyethylene composite material with lower external pressure bearing capacity by changing a seamless steel tube, a glass fiber reinforced plastic tube or other high-strength external pressure bearing materials, and after improvement, the technical problems that the oil tube cannot be lifted due to the fact that the heat-insulating layer is thinned and the heat-insulating effect is reduced after the outer-layer protection tube is extruded and deformed, the annular pressure of the outer-layer protection tube (4) and the oil tube (1) is increased, the end part of the oil tube is sealed poorly, and the original protection layer is thickened locally and the like are thoroughly solved.
3. The two butted semicircular heat-insulating pipe shells on the tubing coupling and the operation section are greatly improved, the semicircular heat-insulating pipe shells are made of reinforced nylon or other high-strength materials, and a plurality of groups of reinforcing ribs are added in the pipe shells for enhancing the external pressure bearing capacity of the semicircular heat-insulating pipe shells; in order to increase the heat preservation performance of the semicircular heat-insulating tube shell, heat-insulating materials are filled in gaps among the reinforcing ribs in the tube shell; in order to solve the problem that the sealing is poor and liquid enters when the two semicircular shells are in butt joint, a layer of sealant is sprayed on the inner surfaces and the two end faces of the two semicircular heat insulation pipe shells. The technical problems that the semicircular heat-insulating pipe shell with the original pure nylon structure is poor in heat-insulating effect although the appearance is not deformed, the semicircular heat-insulating pipe shell with the original nitrile interlayer heat-insulating material is deformed at a higher temperature underground and the like are solved through the improvement.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a sectional view taken along a-a of fig. 1.
Fig. 3 is an enlarged schematic view of part i of fig. 1.
Fig. 4 is a sectional view taken along the direction B-B of fig. 3.
Detailed Description
The invention relates to a structure of an externally wrapped nano heat-insulating oil pipe, which is shown in fig. 1, 2, 3 and 4: the two ends of the oil pipe are provided with thread sections with external threads, the part close to the thread sections at the two ends is provided with two operation sections, the part between the two operation sections is provided with a middle section, and the oil pipe is connected with the oil pipe by an oil pipe coupling for use in a well; the outer wall of the oil pipe (1) middle section is uniformly wrapped with a heat insulation layer (2), the outer side of the heat insulation layer (2) is uniformly lapped and wound with a heat insulation layer shaping protecting belt (3), and the heat insulation layer shaping protecting belt are wrapped on the outer side of the oil pipe middle section and then penetrate into a heat insulation oil pipe outer layer protecting pipe (4) together.
The aerogel nanometer super heat insulation felt or other heat insulation materials are sleeved in a waterproof and radiation heat insulation sleeve bag (14) to form a whole (the heat insulation sleeve bag is made of waterproof and radiation heat insulation materials), and then the heat insulation sleeve bag is uniformly wrapped on the outer side of the oil pipe at the middle section of the oil pipe (1) to form the heat insulation layer (2).
In order to uniformly and tightly wrap the heat-insulating material on the outer side of the oil pipe (1) and simultaneously prevent the waterproof and radiation-proof heat-insulating sleeve bag from being scratched during pipe penetration, a fiber belt with high tensile resistance is adopted as a shaping protecting belt (3) to be uniformly lapped and wound on the outer side of the heat-insulating material.
The outer layer protection tube (4) is made of seamless steel tubes, glass fiber reinforced plastic tubes or other high-strength external pressure bearing materials so as to overcome external pressure formed by liquid column pressure in a shaft, the outer layer protection tube (4) is extruded and deformed, if the outer layer protection tube (4) is extruded and deformed, a heat insulation layer is thinned to reduce a heat insulation effect, annular pressure of the outer layer protection tube (4) and an oil pipe (1) is increased to cause poor sealing effect of the end part of the oil pipe, and local pipe diameter of the oil pipe is thickened when the annular pressure is more serious, so that an accident that the oil pipe cannot be lifted up is caused.
The two ends of the middle section of the oil pipe (1) are provided with anti-displacement forced sealing devices, the fixed steel ring (5) is welded at a set position of the outer wall of the oil pipe, then an anti-displacement positioning ring (6) and a sealing rubber ring (7) which are made of reinforced nylon are sleeved on the outer side of the fixed steel ring (5), finally the outer layer protection pipe (4) and the sealing rubber ring (7) at the position are forced to be compressed to a thinner outer diameter from a thicker outer diameter through hydraulic equipment at the outermost end of the outer layer protection pipe (4), so that a variable diameter section of the outer layer protection pipe with a certain inclination is formed at the end of the middle section of the oil pipe, and the fixed steel ring (5), the anti-displacement positioning ring (6), the sealing rubber ring (7) and the variable diameter section of the outer layer protection pipe (4) with a certain inclination act together to form the complete anti-displacement forced sealing device; the device performs synchronous forced diameter reduction compression on the outer layer protection pipe (4) and the nitrile sealing rubber ring (7) through hydraulic equipment, the density of the sealing rubber ring and the tightness between the outer layer protection pipe and the sealing rubber ring are improved after compression, and the requirement of sealing the end part of the heat insulation oil pipe is met, so that the condition that an oil-water mixture in an oil well cannot enter the heat insulation layer to reduce the heat insulation effect is ensured; the device solves the problem that dislocation offset is generated between the outer protective tube and the heat insulation layer of the oil tube due to larger friction force generated between the heat insulation and heat preservation oil tube and the sleeve in the shaft in the process of lifting and lowering the oil tube under the combined action of the outer protective tube reducing section with a certain inclination and the fixed steel ring (5) and the displacement-preventing positioning ring (6).
The two butted semicircular heat insulation pipe shells (9) fixed on the tubing coupling and the operation section are manufactured by adopting reinforced nylon or other high-strength materials through an injection molding process; in order to enhance the external pressure bearing capacity of the semicircular heat insulation pipe shell, a plurality of groups of reinforcing ribs are added in the pipe shell; in order to increase the heat preservation performance of the semicircular heat-insulating tube shell, heat-insulating materials are filled in gaps among the reinforcing ribs in the tube shell; in order to solve the problem that the sealing is poor and liquid enters when the two semicircular shells are in butt joint, a layer of sealant is sprayed on the inner surfaces and the two end faces of the two semicircular heat insulation pipe shells.
In order to solve the problem of uncertain space between the oil pipe and the oil pipe when the oil pipe is connected through the oil pipe coupling, a trapezoid sealing rubber ring (8) is arranged between the end part of the middle end of the oil pipe (1) and the end parts of two butted semicircular heat insulation pipe shells (9) at the operation section so as to solve the sealing problem caused by uncertain space at the position; the trapezoid sealing rubber ring is made of butadiene-acrylonitrile or other pressure-resistant, oil-resistant, temperature-resistant and corrosion-resistant rubber materials.
The treatment and installation modes at the two operation sections of the oil pipe (1) are as follows: after the oil pipe and the oil pipe are connected on the construction site through the oil pipe coupling (12), two semi-circular heat insulation pipe shells (9) prefabricated in advance are butted on the site and are screwed up by fastening screws (10), and finally, the trapezoid sealing rubber ring is installed, so that the whole installation process is completed. Through the combined use of the two components, the heat insulation effect of the whole pipe column in the use of the pipe column in the well is ensured, the impact resistance in the oil pipe is realized, the strong friction force between the oil pipe and the sleeve is resisted, and the realization of the strong external pressure and other functions in the process of hot well flushing is born.
The aerogel nanometer super heat-insulating felt and the heat-insulating bagging adopt products produced by Nano technology Co.Ltd in Zhejiang Shaoxing.
The semicircular heat-insulating tube shell, the anti-displacement positioning ring and the sealing rubber ring are selected from products designed, produced and sold by the company limited by the technology development of adding Tian and technology in Beijing.
The steel oil pipe, the fiber band with strong tensile resistance, the seamless steel pipe or the glass steel pipe belong to the prior art and can be entrusted to the processing production.
The above materials are selected as examples only, other similar products are also options for this patent, the described examples are only some examples and not all, and all other examples obtained by a person of ordinary skill in the art without making any inventive effort are within the scope of protection of this patent.
Claims (6)
1. The two ends of the oil pipe are threaded sections with external threads, the part close to the threaded sections at the two ends is two operation sections, the part between the two operation sections is a middle section, and the oil pipe is connected with the oil pipe by an oil pipe coupling for use in a well; the method is characterized in that a layer of heat insulation layer (2) is uniformly wrapped on the outer wall of the oil pipe at the middle section of the oil pipe (1), a heat insulation layer shaping protecting belt (3) is uniformly lapped and wound on the outer side of the heat insulation layer (2), and the heat insulation layer shaping protecting belt are wrapped on the outer side of the middle section of the oil pipe and then are penetrated into a heat insulation oil pipe outer layer protecting pipe (4) together; the two ends of the middle section of the oil pipe (1) are provided with displacement-preventing forced sealing devices which are respectively formed by combining a fixed steel ring (5), a displacement-preventing positioning ring (6), a sealing rubber ring (7) and a reducing section with a certain inclination formed by forced compression of an outer layer protection pipe (4), wherein the fixed steel ring (5), the displacement-preventing positioning ring (6) and the sealing rubber ring are directly sleeved on the oil pipe (1); two butted semicircular heat insulation pipe shells (9) with reinforcing ribs are prefabricated in advance on the periphery of the oil pipe connecting coupling (12) and the operating section, a plurality of pipe shell fastening screws (10) are symmetrically arranged on the two butted semicircular heat insulation pipe shells (9), a gap between the two butted semicircular heat insulation pipe shells and the reinforcing ribs is filled with a heat insulation material (11), and sealing glue (13) is sprayed on the inner surfaces and two end surfaces of the two butted semicircular heat insulation pipe shells along the semicircle after the heat insulation material is filled; a trapezoid sealing rubber ring (8) is arranged between the end part of the middle section of the oil pipe (1) and the end parts of two butted semicircular heat insulation pipe shells (9) at the operating section.
2. The externally wrapped nano heat-insulating oil pipe according to claim 1, wherein the heat-insulating material is sleeved in a waterproof and radiation-heat-insulating sleeve (14) to form a whole, and then uniformly wrapped outside the oil pipe at the middle section of the oil pipe (1) to form the heat-insulating layer (2); the outer side of the heat insulation layer (2) is uniformly lapped and wound with a shaping protective belt (3) which tightly clings and winds the heat insulation layer, and the shaping protective belt (3) is a fiber belt with strong tensile resistance; the outer side of the shaping protecting belt (3) is provided with an outer protecting pipe (4) of the heat insulation protecting oil pipe, and the outer protecting pipe (4) is made of a seamless steel pipe or glass fiber reinforced plastic pipe material.
3. The coated nano heat-insulating oil pipe according to claim 2, wherein the heat-insulating material is aerogel nano super heat-insulating felt.
4. The outer wrapping nanometer heat insulation oil pipe according to claim 1, wherein displacement-preventing forced sealing devices are arranged at two ends of a middle section of the oil pipe (1), a fixed steel ring (5) is welded at a set position of the outer wall of the oil pipe, a displacement-preventing positioning ring (6) and a sealing rubber ring (7) which are made of reinforced nylon are sleeved on the outer side of the fixed steel ring (5), and finally the outer protecting pipe (4) and the sealing rubber ring (7) at the outer end of the outer protecting pipe (4) are forcedly compressed from a thicker outer diameter to a thinner outer diameter through hydraulic equipment, and a reducing section of the outer protecting pipe with a certain inclination is formed at the end of the middle section of the oil pipe.
5. The externally wrapped nano heat-insulating oil pipe according to claim 1, wherein two butted semicircular heat-insulating pipe shells (9) fixed on the oil pipe coupling and the operation section are made of reinforced nylon materials through an injection molding process; a plurality of groups of reinforcing ribs are arranged in the tube shell; the gaps between the reinforcing ribs are filled with heat insulation materials; and a layer of sealant is sprayed on the inner surfaces and the two end surfaces of the two semicircular heat insulation tube shells.
6. The externally wrapped nano heat-insulating oil pipe according to claim 1, wherein a trapezoid sealing rubber ring (8) is arranged between the end part of the middle end of the oil pipe (1) and the end parts of two butted semicircular heat-insulating pipe shells (9) at the operation section, and the trapezoid sealing rubber ring (8) is made of nitrile rubber materials.
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| CN201710316260.3A CN106907114B (en) | 2017-05-08 | 2017-05-08 | Externally wrapped nano heat-insulating oil pipe |
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| CN201710316260.3A CN106907114B (en) | 2017-05-08 | 2017-05-08 | Externally wrapped nano heat-insulating oil pipe |
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| CN106907114B true CN106907114B (en) | 2023-05-02 |
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Families Citing this family (3)
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| CN108302284A (en) * | 2018-02-06 | 2018-07-20 | 中国石油工程建设有限公司华北分公司 | A kind of underground heat-insulated oil pipe and preparation method thereof |
| CN108442909B (en) * | 2018-04-02 | 2024-01-05 | 王景桐 | Oil extraction system based on heat-insulating oil pipe and coating heat-insulating hollow sucker rod |
| CN109138951A (en) * | 2018-09-07 | 2019-01-04 | 沧州润涛石油设备有限公司 | A kind of high-efficiency insulated heating oil pipe suitable for thickened oil recovery |
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| RU164571U1 (en) * | 2015-03-02 | 2016-09-10 | Александр Федорович Крюченков | UNIFIED HEAT-INSULATING MODULE OF THE HEAT-INSULATING COATING OF THE PIPELINE |
| CN104989289A (en) * | 2015-07-16 | 2015-10-21 | 刘兴仁 | Sealing and heat insulating device for wrapped insulated tubing and manufacturing method thereof |
| CN106089107A (en) * | 2016-08-12 | 2016-11-09 | 刘兴仁 | One is wear-resisting, liner is pressure, anticorrosion, nano heat-insulating composite oil pipe |
| CN206737840U (en) * | 2017-05-08 | 2017-12-12 | 刘兴仁 | Nano heat-insulating thermal insulation tubing is wrapped up in outside a kind of |
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