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Quick scale gathering and removing method and device for gathering pipeline

A collection and transportation pipeline, scale accumulation and descaling technology, applied to cleaning methods and appliances, chemical instruments and methods, cleaning hollow objects, etc., can solve the problems of pipeline pressure suppression, small effect of scale inhibitor, and limited effect of hot washing, etc. , to achieve the effect of simple on-site management, ensuring normal production and eliminating potential safety hazards

Active Publication Date: 2014-12-17
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, anti-scaling technology has little effect. First of all, hot washing construction has the problem of "treating the symptoms but not the root cause", especially for some gathering and transportation pipelines with serious fouling, the effect of hot washing is limited, and the pipeline will quickly scale after hot washing , brought a lot of trouble to oilfield production management, and caused the cost of hot washing to increase; secondly, when adding scale inhibitors for scale inhibition, due to the complex composition and properties of the oilfield output fluid, the selected scale inhibitors The effect is very little, and the problem of fouling of oil pipelines cannot be completely solved. Moreover, the blockage of gathering and transportation pipelines will cause dangers such as pipeline pressure suppression, which will bring serious safety hazards to oil field production.

Method used

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  • Quick scale gathering and removing method and device for gathering pipeline
  • Quick scale gathering and removing method and device for gathering pipeline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: as figure 1 , figure 2 as shown,

[0027] A rapid accumulation and descaling device for gathering and transportation pipelines. Six three-way cylinders are connected by stainless steel flange connection pieces to form a set of descaling units. The structure of one set of descaling units is the right end of the first three-way cylinder 16 Connect the left end of the second three-way cylinder 17, the lower end of the first three-way cylinder 16 connects the upper end of the third three-way cylinder 18, and the right end of the second three-way cylinder 17 connects the upper end of the sixth three-way cylinder 21 , the lower end of the second three-way cylinder 17 is connected to the upper end of the fourth three-way cylinder 19, the left end of the fourth three-way cylinder 19 is connected to the right end of the third three-way cylinder 18, and the right end of the fourth three-way cylinder 19 Connect the upper end of the fifth three-way cylinder 20;

...

Embodiment 2

[0032] Embodiment 2: as figure 1 , figure 2 as shown,

[0033]A rapid accumulation and descaling device for gathering and transportation pipelines. The component unit is a standard three-way cylinder. The inner diameter of the cylinder is 2 to 3 times the diameter of the gathering and transportation pipeline. The flow rate of the liquid entering the cylinder will be reduced to 1 / 2 of the original 4 to 1 / 8, ensuring sufficient time and space for scaling. Six three-way cylinders are connected by stainless steel flanges to form a group of descaling units. The upper and lower horizontal cylinders of each group of descaling units are equipped with heating rod working cylinders. The outer diameter of the heating rod working cylinders is a three-way 1 / 3~1 / 2 of the inner diameter of the cylinder, the heating rod working cylinder is connected with the end flange of the three-way cylinder, which ensures the sealing and is easy to disassemble. The electric heating rod is inserted int...

Embodiment 3

[0044] Embodiment 3: as figure 1 , figure 2 As shown, the average daily fluid production of a well in Xinjiang Chepaizi Oilfield is 25t, the average water content is 25%, the salinity of the produced water is 59463.77mg / l, and the content of calcium ions is also high; at the same time, due to the production The content of hydrogen sulfide in the liquid reached 4067.76mg / m 3 , so add sulfur remover. The single well gathering and transportation pipeline of this well is a steel pipe of about 60mm. If it is completely blocked, it is necessary to hot wash the gathering and transportation pipeline of a single well every 7 days to remove the blockage or replace a new pipeline, and due to the poor effect of hot washing and descaling, it is necessary to regularly replace the new single well gathering and transportation pipeline every 40 days.

[0045] In response to the above situation, the rapid accumulation and scale removal process of the gathering and transportation pipeline wa...

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Abstract

The invention discloses a quick scale gathering and removing method and device for a gathering pipeline and belongs to the technical field of gathering, transportation and production in an oil field. A first control valve and a second control valve are connected with one end of a third control valve. The other end of the third control valve is connected with a first descaling unit device. The other end of the first descaling unit device is connected with a fourth control valve. The fourth control valve and a fifth control valve are connected with one end of a sixth control valve. The other end of the sixth control valve is connected with a second descaling unit device. The other end of the second descaling unit device is connected with a seventh control valve. The seventh control valve and an eighth control valve are connected with one end of a ninth control valve. The other end of the ninth control valve is connected with a third descaling unit device. The other end of the third descaling unit device is connected with a tenth control valve. The tenth control valve and an eleventh control valve are connected with one end of a twelfth control valve. By means of the quick scale gathering and removing method and device, quick installation and replacement without flame operation and stop are achieved.

Description

technical field [0001] The invention relates to a method and device for rapid accumulation and scale removal of gathering and transportation pipelines, belonging to the technical field of oilfield gathering and transportation production. Background technique [0002] At present, in oilfield production, the main method of scaling oil pipelines is to prevent them. The main method is to perform hot cleaning on scaled pipelines or add scale inhibitors to pipelines. However, anti-scaling technology has little effect. First of all, there is a problem of "treating the symptoms but not the root cause" in hot washing construction, especially for some gathering and transportation pipelines with serious fouling, the effect of hot washing is limited, and the pipeline will scale quickly after hot washing , brought a lot of trouble to the oilfield production management, and caused the cost of hot washing to increase; secondly, when adding scale inhibitors for scale inhibition, due to the ...

Claims

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Application Information

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IPC IPC(8): B08B9/027
CPCB08B9/027
Inventor 张新国李拥军梁爱国夏玮史建英黄玲
Owner PETROCHINA CO LTD
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