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Super-long insulation steel-sleeved steel pipeline and machining process thereof

A processing technology, a technology of steel sleeve steel, applied in the direction of protecting pipelines, casings, and insulation through heat insulation, can solve problems such as high mining costs, shortened service life of pipelines, and reduced insulation effects, and achieve good insulation performance and corrosion resistance Performance, long service life, and the effect of ensuring thermal insulation performance

Pending Publication Date: 2019-04-05
XINDA KECHUANG TANGSHAN PETROLEUM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Geothermal energy has a wide range of utilization value. In order to make better use of geothermal resources, the following problems need to be solved: low utilization rate of geothermal energy; few exploitable geothermal resources; high mining cost
[0013] Patent CN2643136Y (authorized announcement date: September 22, 2004) discloses a vacuum insulation pipeline. The jacket steel pipe is set on the outside of the working steel pipe. Several movable supports are fixed on the working steel pipe. The two ends of the fixed bracket are respectively connected to the jacket On the steel pipe and the working steel pipe, the insulation cotton is filled between the working steel pipe and the jacket steel pipe, and the space between the jacket steel pipe and the working steel pipe is in a vacuum state, and the insulation performance of the pipe is improved by using vacuum heat insulation. The support cannot play a good supporting role. At the same time, the outer steel pipe and the working steel pipe of this product are connected by a fixed bracket. When it is used for thousands of meters of underground work, it is easy to deform, resulting in the failure of the fixed bracket and seriously shortening the use of the pipeline. life
[0014] In the patent CN208090184U (authorized publication date: November 13, 2018), a steel-sheathed steel insulation pipe is disclosed, which includes a working steel pipe, a PPR pipe jacketed on the working steel pipe, and a protective steel pipe jacketed on the PPR pipe. A closed cavity is formed between the working steel pipe and the PPR pipe, and a support frame for keeping the two coaxial is arranged between the working steel pipe and the PPR pipe, and a heating element is installed on the outer wall of the working steel pipe. There is also a PPR pipe in the middle of the steel insulation pipe, and a heating element is installed on the outer wall of the working steel pipe to achieve its insulation effect. This steel pipe is not suitable for underground heat source mining operations. The addition of PPR pipes may increase the insulation effect to a certain extent, but Due to the high geothermal temperature in the working environment, it also causes the heating deformation of PPR, resulting in a rapid decrease in its thermal insulation effect

Method used

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  • Super-long insulation steel-sleeved steel pipeline and machining process thereof
  • Super-long insulation steel-sleeved steel pipeline and machining process thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Stainless steel is selected as the steel used for the working steel pipe, and the weight percentages of its main components are as follows: C 0.019%, Si 0.49%, Mn 1.25%, P 0.022%, S 0.00005%, Ni 5.16%, Cr 22.46%, N 0.163%, Cu0. 003%, Mo 3.07%, and the rest are Fe and unavoidable impurities. Titanium alloy TA18 alloy is selected as the jacket steel pipe, and the weight percentages of its main components are as follows: Al 3.5%, V 1.5%-3.0%, Fe 0.25%, C 0.05 %, N 0.05%, H0.015%, O 0.12%, and the rest are Ti and unavoidable impurities. Utilize the above-mentioned steel material that selects (wherein two kinds of steel material lengths are 1000 meters) prepare 1000 meters of thermal insulation steel sheathed steel pipes, its structure is as follows figure 1 As shown, the specific preparation process is as follows:

[0055] (1) The steel plate used in the working steel pipe is cleaned on the surface, specifically by using a surfactant (preferably sodium dodecylbenzene sulfo...

Embodiment 2

[0061] Titanium alloy TA18 is selected as the material for making working steel pipes. The weight percentages of its main components are as follows: Al2.0%, V 1.5%, Fe 0.25%, C 0.05%, N 0.05%, H 0.015%, O 0.12%, and the rest are Ti and unavoidable impurities. Carbon steel is selected as the material for making outer jacket steel pipes, and the weight percentages of its main components are as follows: C 0.11%, Si0.22%, Mn 1.44%, P 0.008%, S 0.001%, Cr 0.58%, Ni 0.14%, Cu 0.24% , Mo 0.15%, the rest is Fe and unavoidable impurities. Utilize the above-mentioned steel material that selects (wherein two kinds of steel material lengths are 3000 meters) preparation length is the insulation steel sheath steel pipeline of 3000 meters, and its structure is as follows figure 2 As shown, the specific preparation process of the pipeline is as follows:

[0062](1) The steel plate used in the working steel pipe is cleaned on the surface, specifically by using a surfactant (preferably sodiu...

Embodiment 3

[0068] Carbon steel is selected as the material for making working steel pipes, and the weight percentages of its main components are as follows: C 0.11%, Si0.24%, Mn 1.5%, P 0.012%, S 0.001%, Cr 0.58%, Ni 0.14%, Cu 0.24% , Mo 0.16%, the rest is Fe and unavoidable impurities. Stainless steel is selected as the material for making the jacket steel pipe, and the weight percentages of its main components are as follows: C 0.020%, Si 0.50%, Mn 1.26%, P 0.022%, S 0.00005%, Ni 5.17%, Cr22.52%, N 0.163%, Cu 0.006%, Mo 3.07%-3.09%, the rest is Fe and unavoidable impurities. Utilize the above-mentioned steel material that selects (wherein two kinds of steel material lengths are 5000 meters) preparation length is the insulation steel sheathed steel pipeline of 5000 meters, the preparation process of this pipeline is as follows:

[0069] (1) The steel plate used in the working steel pipe is cleaned on the surface, specifically by using a surfactant (preferably sodium dodecylbenzene sulf...

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Abstract

The invention discloses a super-long insulation steel-sleeved steel pipeline and a machining process thereof. The pipeline has good insulation performance and corrosion resistance. An annular cavity of the pipeline is in a vacuum state, is internally provided with a support and is filled with phase change material. When underground energy is exploited through the super-long insulation steel-sleeved steel pipeline and outside temperature is lowered, the condition that temperature in a work steel pipe in the pipeline is not influenced can be kept effectively. Service life of the steel-sleeved steel pipeline is long, exploitation cost of petroleum and underground heat sources can be lowered greatly, and heat energy loss in exploitation is reduced.

Description

technical field [0001] The invention relates to the technical field of thermal insulation pipelines, in particular to an ultra-long thermal insulation steel-sheathed steel pipeline and its processing technology. Background technique [0002] At present, most areas use coal-fired heat for heating in winter, and at the same time, the heat will inevitably cause losses during transmission, which will lead to a sharp increase in the amount of coal burned. With the continuous reduction of energy resources, reducing energy consumption has become a reality. One of the urgent problems to be solved. [0003] Geothermal is the heat energy contained in the earth's interior. It has two different origins, one from outside the Earth and one from within. From the surface to the inside, the influence of solar radiation gradually weakens, and at a certain depth, this influence disappears, and the temperature remains unchanged throughout the year, that is, the so-called "normal temperature l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L59/04B23P15/00
CPCF16L59/04B23P15/00F24T10/13F16L59/065F16L59/143C09K5/063B21C37/154C22C14/00C21D1/26C21D9/08C21D2251/00C22F1/183C23C26/00C22C38/02C22C38/04C22C38/001C22C38/44C22C38/42Y02E10/10F16L59/00F16L59/14F16L9/02F16L9/18F16L59/147B21D5/12B08B9/023B23K26/21E21B17/01F16L11/20C21D6/004C21D6/005C21D6/008C21D8/105C21D9/14C21D9/50C22C38/002C23F11/173F16L7/02B21D39/00Y10T29/49826
Inventor 张书军郑镔段建良董健林越青刘祥上官丰收
Owner XINDA KECHUANG TANGSHAN PETROLEUM EQUIP CO LTD
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