CN107060656B - Lining heat insulation oil pipe - Google Patents
Lining heat insulation oil pipe Download PDFInfo
- Publication number
- CN107060656B CN107060656B CN201710522347.6A CN201710522347A CN107060656B CN 107060656 B CN107060656 B CN 107060656B CN 201710522347 A CN201710522347 A CN 201710522347A CN 107060656 B CN107060656 B CN 107060656B
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- pipe
- pressure
- bearing inner
- oil pipe
- heat
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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
-
- 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
- E21B36/00—Heating, cooling, insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
- E21B36/003—Insulating arrangements
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
Abstract
The invention discloses a lining heat-insulating oil pipe, which is composed of a steel oil pipe, a pressure-bearing inner pipe embedded in the oil pipe, a heat-insulating layer wrapped outside the pressure-bearing inner pipe, a shaping protecting belt wrapped outside the heat-insulating layer and an oil pipe coupling. The oil pipe is characterized in that the outside of the pressure-bearing inner pipe is wrapped with a heat-insulating layer and a winding shaping protecting belt, then the heat-insulating layer and the winding shaping protecting belt are penetrated into the oil pipe together, the pressure-bearing inner pipe and the heat-insulating layer are fixed in the oil pipe through anti-slip forced sealing devices and forced sealing devices which are respectively arranged at two end parts of the oil pipe and the pressure-bearing inner pipe, and finally a plurality of oil pipes are connected together through an oil pipe coupling for use in a well. 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 flow state and wax precipitation of the crude oil in the well, improve the temperature of the well and the crude oil at the top of the well, simplify the ground gathering flow, reduce the load of the pumping unit, and finally achieve the purposes of saving energy, reducing emission, creating income, enhancing efficiency and greatly reducing the petroleum exploitation cost.
Description
Technical Field
The invention relates to a lining 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 a lining heat-insulating oil pipe, which can effectively reduce the temperature loss of crude oil in the process of flowing from a well bottom to a well head, improve the viscosity, wax precipitation and flow state of the crude oil in a shaft, and improve the temperature of the crude oil at the original well head 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 hot water furnace and the like, and really achieving the purposes of saving energy, reducing emission, creating and enhancing effects, and greatly reducing the oil exploitation cost.
The technical scheme adopted by the invention is as follows:
an inner lining heat insulation oil pipe is provided with external threads at two ends, and the oil pipe is connected with the oil pipe by an oil pipe coupling (9) and screwed down into a well for use; the method is characterized in that a pressure-bearing inner pipe (2) is fixedly embedded in the oil pipe (1), a layer of heat insulation layer (3) is uniformly wrapped on the outer wall of the pressure-bearing inner pipe (2), a heat insulation layer shaping protecting belt (4) is uniformly lapped and wound on the outer layer of the heat insulation layer (3), the heat insulation layer is wrapped on the outer side of the pressure-bearing inner pipe (2), and the heat insulation layer shaping protecting belt is wound on the outer side of the pressure-bearing inner pipe, and then the heat insulation layer shaping protecting belt is penetrated into the oil pipe (1); the oil pipe (1) and one end of the pressure-bearing inner pipe (2) close to the oil pipe coupling (9) are provided with anti-slip forced sealing devices, and each anti-slip forced sealing device is formed by combining a fixed steel ring (7), an anti-pressure-bearing inner pipe slip positioning ring (6), a sealing rubber ring (5) and a variable diameter section with a certain inclination formed by forced pipe expansion of the pressure-bearing inner pipe (2) which are adjacently and directly sleeved on the pressure-bearing inner pipe (2); the other ends of the oil pipe (1) and the pressure-bearing inner pipe (2) are provided with forced sealing devices, and the devices consist of a sealing rubber ring (10) and a reducing section with a certain inclination formed by forced pipe expansion of the pressure-bearing inner pipe (2); in the oil pipe (1), a pressure-bearing inner pipe (2) and a heat-insulating layer (3) are fixed in the oil pipe (1) through an anti-slip forced sealing device arranged at one end close to an oil pipe coupling (9) and a forced sealing device arranged at the other end of the oil pipe; when the oil pipes are connected through the oil pipe coupling (9), a sealing rubber ring (8) is arranged in a gap between the two oil pipes.
The pressure-bearing inner pipe (2) is made of high-strength pressure-bearing materials, and comprises a seamless steel pipe, a glass fiber reinforced plastic pipe or a composite pipe with a steel skeleton clamped in plastic.
The heat insulation layer (3) is formed by sleeving heat insulation materials into a waterproof heat insulation sleeve bag (11) for insulating radiant heat into a whole and then uniformly wrapping the outside of the pressure-bearing inner pipe (2), wherein the heat insulation materials are heat insulation materials with good heat insulation performance, and the heat insulation materials comprise aerogel nanometer super heat insulation felt.
The heat-insulating layer shaping protective belt (4) is made of fiber belts or steel belts with high tensile resistance.
The anti-slip forced sealing device is arranged at one end of the oil pipe (1) and the pressure-bearing oil pipe (2) close to the oil pipe coupling (9), the device is characterized in that a fixed steel ring (7) is welded at a set position of the inner wall of the oil pipe (1), an anti-slip positioning ring (6) of the pressure-bearing inner pipe made of reinforced nylon and a sealing rubber ring (5) made of Buna or PTFE material are sleeved at the upper end of the fixed steel ring (7), the pressure-bearing inner pipe (2) and the sealing rubber ring (5) at the uppermost end of the pressure-bearing inner pipe (2) are forcedly expanded to a thicker outer diameter from a thinner outer diameter through hydraulic pipe expanding equipment, and a diameter-variable section with a certain inclination formed after diameter expansion is positioned at the corresponding position of the anti-slip positioning ring (6) of the pressure-bearing inner pipe above the fixed steel ring (7) so as to finish forced sealing of the position and form the anti-slip forced sealing device for preventing the pressure-bearing inner pipe (2).
The other ends of the oil pipe (1) and the pressure-bearing inner pipe (2) are provided with a forced sealing device, the device is characterized in that a sealing rubber ring (10) made of butadiene-acrylonitrile or polytetrafluoroethylene material is arranged between the oil pipe (1) and the pressure-bearing inner pipe (2), and then the pressure-bearing inner pipe (2) and the sealing rubber ring (10) at the position are forced to expand from a thinner outer diameter to a thicker outer diameter through hydraulic pipe expanding equipment, so that a variable-diameter pipe section of the pressure-bearing inner pipe with a certain inclination is formed at the position, and the sealing rubber ring is compressed, so that forced sealing is completed.
When the oil pipes are connected through the oil pipe coupling (9), a sealing rubber ring (8) made of a nitrile material is arranged in a gap between the two oil pipes.
The invention has the advantages that: under the condition of not adding any external artificial supplementary energy sources, 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 at the bottom of the well to the wellhead is reduced, the temperature of the crude oil at the well and the wellhead is improved, the viscosity, wax precipitation and flow state of the crude oil in the well are improved, the problems of hot washing of the oil well, adding various chemical preventive agents, electric heating and viscosity reduction, simplifying the ground gathering and conveying process flow, changing three-pipe heat tracing into single-pipe non-heating normal-temperature conveying, removing a hot water furnace and the like are solved, and the energy conservation, emission reduction, income and efficiency creation and great reduction of petroleum exploitation cost are truly achieved.
The invention has the following outstanding substantial characteristics:
1. the inner lining heat insulation pipe is provided with a pressure bearing inner pipe (2) made of a seamless steel pipe, the pressure bearing inner pipe is arranged at the innermost side of the inner lining heat insulation pipe, the seamless steel pipe is used for bearing the liquid column pressure in the oil pipe, the liquid column pressure in the oil pipe is not extruded to be thinner to reduce the heat insulation effect, the seamless steel pipe is used for a certain plastic deformation space, the pressure bearing inner pipe at the upper end and the lower end of the oil pipe and the pressure bearing inner pipe is forced to be enlarged by hydraulic equipment, the sealing rubber rings arranged at the positions are compressed, the sealing of the oil pipe and the two end parts of the pressure bearing inner pipe is achieved, and the fact that liquid in the oil pipe cannot enter the heat insulation layer is ensured to reduce the heat insulation effect is ensured.
2. The upper end part of the lining heat-insulating oil pipe is provided with an anti-sliding forced sealing device, and the device successfully solves the problems of sealing the upper end part of the oil pipe and preventing the pressure-bearing inner pipe and the heat-insulating layer from sliding downwards due to gravity and friction resistance between the sucker rod and the pressure-bearing inner pipe during operation.
3. The invention can be seen through the structural schematic diagram that the whole structure of the invention prevents all metals of the pressure-bearing inner pipe (2) and the oil pipe (1) from contacting, and prevents the heat diffusion between the inner heat body of the oil pipe and the outside to the maximum extent, thereby improving the heat insulation effect.
Drawings
FIG. 1 is a schematic view of the structure of the present invention
FIG. 2 is an enlarged schematic view of a portion I of FIG. 1
Detailed Description
The invention relates to a structure of a lining heat insulation oil pipe, which is shown in fig. 1 and 2:
an inner lining heat insulation oil pipe is provided with external threads at two ends, and the oil pipe is connected with the oil pipe by an oil pipe coupling (9) and screwed down into a well for use; the oil pipe is characterized in that a pressure-bearing inner pipe (2) is fixedly embedded in the oil pipe (1), a layer of heat insulation layer (3) is uniformly wrapped on the outer wall of the pressure-bearing inner pipe (2), a heat insulation layer shaping protecting belt (4) is uniformly lapped and wound on the outer layer of the heat insulation layer (3), and the heat insulation layer is wrapped on the outer side of the pressure-bearing inner pipe (2) and the heat insulation layer shaping protecting belt is wound and then penetrates into the oil pipe (1).
In order to ensure that a liquid column pressure in the oil pipe extrudes a heat insulation layer to be thinner so as to reduce the heat insulation effect, a pressure-bearing inner pipe (2) is arranged at the innermost side of the lining heat insulation oil pipe, and the pressure-bearing inner pipe is made of high-strength pressure-bearing materials and comprises a seamless steel pipe, a glass fiber reinforced plastic pipe and a composite pipe with a steel skeleton clamped in plastic.
The heat insulation and preservation material is sleeved in a waterproof heat insulation sleeve bag (11) for insulating radiant heat to form a whole, and then uniformly wrapped on the outer side of the pressure-bearing inner pipe (2) to form the heat insulation and preservation layer (3), wherein the heat insulation and preservation material with good heat preservation performance is selected and used and comprises aerogel nanometer super heat insulation and preservation felt.
In order to uniformly and tightly wrap the heat-insulating material on the outer side of the pressure-bearing inner pipe (2) and simultaneously prevent the waterproof and radiation-proof heat-insulating sleeve from being scratched during pipe penetration, a fiber belt or a steel belt with high tensile resistance is adopted as a heat-insulating layer shaping protection belt (4) to be uniformly lapped and wound on the outer side of the heat-insulating material.
The anti-slip forced sealing device is formed by welding a fixed steel ring (7) on a set position of the inner wall of the oil pipe (1), sleeving an anti-slip positioning ring (6) of the anti-slip inner pipe made of reinforced nylon and a sealing rubber ring (5) made of Buna-N or Teflon material on the upper end of the fixed steel ring (7), and finally forcibly expanding the pressure-bearing inner pipe (2) and the sealing rubber ring (5) at the position from a thinner outer diameter to a thicker outer diameter at the uppermost end of the pressure-bearing inner pipe (2) through hydraulic pipe expanding equipment so as to finish the forced sealing of the position and prevent the pressure-bearing inner pipe (2) from slipping down, and forming a variable-diameter pipe section with a certain gradient under the combined action of the fixed steel ring (7), the anti-bearing inner pipe slip positioning ring (6), the sealing rubber ring (5) and the pressure-bearing inner pipe (2) after being forcibly expanded; the device compresses the sealing rubber ring (5) while forcibly expanding the diameter of the pressure-bearing inner pipe (2) through hydraulic pipe expanding equipment, and the density of the compressed sealing rubber ring is improved to meet the sealing requirement of the sealing rubber ring, thereby ensuring that the oil-water mixture in an oil well cannot enter a heat insulation layer to reduce the heat insulation effect; the pressure-bearing inner pipe (2) is forced to expand in diameter and then forms a reducing pipe section with a certain inclination at the position, and the reducing pipe section, the fixed steel ring (7) and the positioning ring (6) for preventing the pressure-bearing inner pipe from sliding downwards are combined to solve the problem of preventing the pressure-bearing inner pipe and the heat insulation layer from sliding downwards due to gravity and friction resistance between the sucker rod and the pressure-bearing inner pipe during operation.
The other ends of the oil pipe (1) and the pressure-bearing inner pipe (2) are provided with a forced sealing device, the device is characterized in that a sealing rubber ring (10) made of butadiene-acrylonitrile or polytetrafluoroethylene material is arranged between the oil pipe (1) and the pressure-bearing inner pipe (2), and then the pressure-bearing inner pipe (2) and the sealing rubber ring (10) at the position are forced to expand from a thinner outer diameter to a thicker outer diameter through hydraulic pipe expanding equipment, so that a variable-diameter pipe section of the pressure-bearing inner pipe with a certain inclination is formed at the position, and the sealing rubber ring is compressed, so that forced sealing is completed.
In the oil pipe (1), a pressure-bearing inner pipe (2) and a heat-insulating layer (3) are fixed in the oil pipe (1) through an anti-slip forced sealing device arranged at one end close to an oil pipe coupling (9) and a forced sealing device arranged at the other end of the oil pipe.
When the oil pipes are connected through the oil pipe coupling (9), a sealing rubber ring (8) made of a nitrile material is arranged in a gap between the two oil pipes.
The aerogel nanometer super heat-insulating felt and the heat-insulating bagging adopt products produced by Nano technology Co.Ltd in Zhejiang Shaoxing.
The anti-slip positioning ring and the sealing rubber ring of the anti-pressure inner pipe are selected from products designed, produced and sold by the limited company of the advanced technology development and the additional world in Beijing.
The steel oil pipe, the fiber band with strong tensile resistance and the seamless steel pipe belong to the prior art and can be entrusted to 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 (7)
1. An inner lining heat insulation oil pipe is provided with external threads at two ends, and the oil pipe is connected with the oil pipe by an oil pipe coupling (9) and screwed down into a well for use; the method is characterized in that a pressure-bearing inner pipe (2) is fixedly embedded in the oil pipe (1), a layer of heat insulation layer (3) is uniformly wrapped on the outer wall of the pressure-bearing inner pipe (2), a heat insulation layer shaping protecting belt (4) is uniformly lapped and wound on the outer layer of the heat insulation layer (3), the heat insulation layer is wrapped on the outer side of the pressure-bearing inner pipe (2), and the heat insulation layer shaping protecting belt is wound on the outer side of the pressure-bearing inner pipe, and then the heat insulation layer shaping protecting belt is penetrated into the oil pipe (1); the oil pipe (1) and one end of the pressure-bearing inner pipe (2) close to the oil pipe coupling (9) are provided with anti-slip forced sealing devices, and each anti-slip forced sealing device is formed by combining a fixed steel ring (7), an anti-pressure-bearing inner pipe slip positioning ring (6), a sealing rubber ring (5) and a variable diameter section with a certain inclination formed by forced pipe expansion of the pressure-bearing inner pipe (2) which are adjacently and directly sleeved on the pressure-bearing inner pipe (2); the other ends of the oil pipe (1) and the pressure-bearing inner pipe (2) are provided with forced sealing devices, and the devices consist of a sealing rubber ring (10) and a reducing section with a certain inclination formed by forced pipe expansion of the pressure-bearing inner pipe (2); in the oil pipe (1), a pressure-bearing inner pipe (2) and a heat-insulating layer (3) are fixed in the oil pipe (1) through an anti-slip forced sealing device arranged at one end close to an oil pipe coupling (9) and a forced sealing device arranged at the other end of the oil pipe; when the oil pipes are connected through the oil pipe coupling (9), a sealing rubber ring (8) is arranged in a gap between the two oil pipes.
2. The lining heat-insulating oil pipe according to claim 1, wherein the pressure-bearing inner pipe (2) is made of high-strength pressure-bearing materials, and comprises a seamless steel pipe, a glass fiber reinforced plastic pipe or a composite pipe with a steel skeleton sandwiched in plastic.
3. The lining heat-insulating oil pipe according to claim 1, wherein the heat-insulating layer (3) is formed by sleeving heat-insulating materials in a waterproof heat-insulating sleeve bag (11) for insulating radiant heat into a whole and then uniformly wrapping the heat-insulating sleeve bag outside the pressure-bearing inner pipe (2), and the heat-insulating layer (3) is formed by using heat-insulating materials with good heat-insulating performance, including aerogel nanometer super heat-insulating felt.
4. The lined heat-insulating oil pipe according to claim 1, wherein the heat-insulating layer shaping protecting belt (4) is made of fiber belts or steel belts with strong tensile resistance.
5. The lining heat-insulating oil pipe according to claim 1, characterized in that an anti-slip forced sealing device is arranged at one end of the oil pipe (1) and the pressure-bearing inner pipe (2) close to an oil pipe coupling (9), the device is characterized in that a fixed steel ring (7) is welded at a set position of the inner wall of the oil pipe (1), then an anti-slip positioning ring (6) of the pressure-bearing inner pipe made of reinforced nylon and a sealing rubber ring (5) made of Buna or PTFE material are sleeved at the upper end of the fixed steel ring (7), finally the pressure-bearing inner pipe (2) and the sealing rubber ring (5) at the uppermost end of the pressure-bearing inner pipe (2) are forcedly expanded to a thicker outer diameter from a thinner outer diameter through hydraulic pipe expanding equipment, and a variable diameter section with a certain inclination is formed at a position corresponding to the anti-slip forced sealing device of the anti-slip inner pipe (6) of the fixed steel ring (7) after pipe expanding.
6. The lining heat-insulating oil pipe according to claim 1, wherein a forced sealing device is arranged at the other ends of the oil pipe (1) and the pressure-bearing inner pipe (2), the device is characterized in that a sealing rubber ring (10) made of butadiene-acrylonitrile or polytetrafluoroethylene material is arranged between the oil pipe (1) and the pressure-bearing inner pipe (2), and then the pressure-bearing inner pipe (2) and the sealing rubber ring (10) are forced to expand from a thinner outer diameter to a thicker outer diameter through hydraulic pipe expanding equipment, so that a pressure-bearing inner pipe reducer pipe section with a certain inclination is formed at the position, and the sealing rubber ring is compressed, so that forced sealing is completed.
7. The lined heat-insulating oil pipe according to claim 1, wherein a sealing rubber ring (8) made of a nitrile material is installed in a gap between the two oil pipes when the oil pipes are connected through an oil pipe coupling (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710522347.6A CN107060656B (en) | 2017-06-30 | 2017-06-30 | Lining heat insulation oil pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710522347.6A CN107060656B (en) | 2017-06-30 | 2017-06-30 | Lining heat insulation oil pipe |
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| Publication Number | Publication Date |
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| CN107060656A CN107060656A (en) | 2017-08-18 |
| CN107060656B true CN107060656B (en) | 2023-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710522347.6A Active CN107060656B (en) | 2017-06-30 | 2017-06-30 | Lining heat insulation oil pipe |
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| CN (1) | CN107060656B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112065328A (en) * | 2019-06-10 | 2020-12-11 | 中国石油天然气股份有限公司 | Device and method for cleaning wax in oil pipe through hot washing |
| CN110318714A (en) * | 2019-06-26 | 2019-10-11 | 江苏联冠兆星石化科技有限公司 | A kind of " cold adopt cold defeated " from producing well to measuring station adopts fuel transfer system |
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| CN206957590U (en) * | 2017-06-30 | 2018-02-02 | 刘兴仁 | A kind of liner heat-insulation and heat-preservation oil pipe |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7458617B2 (en) * | 2004-09-28 | 2008-12-02 | Advanced Composite Products & Technology, Inc. | Composite drill pipe |
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|---|---|---|---|---|
| CN2769492Y (en) * | 2004-12-22 | 2006-04-05 | 辽河石油勘探局 | High temperature sealing joint |
| CN102086758A (en) * | 2010-12-31 | 2011-06-08 | 江苏常宝钢管股份有限公司 | Integral-assembling type heat-insulating oil pipe connection structure |
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| CN107060656A (en) | 2017-08-18 |
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