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Defoaming method for the foam well drilling

A foam and defoaming technology, applied in drilling composition, foam dispersion/prevention, chemical instruments and methods, etc., can solve problems such as non-recyclable, non-recyclable foam, and environmental pollution

Inactive Publication Date: 2008-01-02
WESTERN DRILLING KELAMAYI DRILLING TECH INST
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the foam generated in foam drilling cannot be treated and recovered, and the used drilling base fluid is directly discharged into the waste liquid pool through the combustion pipeline, which cannot be recycled, so there are the following disadvantages:
[0003] ①Because the base fluid cannot be recycled, the cost of foam drilling increases
[0004] ②The used drilling base fluid produces a large amount of foam that cannot be recovered, and a large-volume waste liquid pool must be built to meet the needs of the site
[0005] ③ Due to the addition of various materials in the used drilling base fluid, long-term placement in the waste liquid pool will cause great pollution to the environment

Method used

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  • Defoaming method for the foam well drilling
  • Defoaming method for the foam well drilling

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Embodiment Construction

[0013] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0014] As shown in Figure 1, Figure 2, Figure 3 and Figure 4, (a) the foam circulated in the wellbore enters the primary separation mechanism through the throttle valve 1 at the inlet of the cyclone separator 2 in Figure 1, and first passes through the cyclone Type separator 2 performs one-stage defoaming. Under the action of centrifugal force, the solid phase particles carried in the foam move toward the outer wall, and at the same time, the gas phase and liquid phase in the foam are separated, and the solid phase particles gradually settle to the cyclone separation under the action of gravity. The combustion outlet 3 at the lower part of the device 2, and finally settle in the sand removal tank 4, the gas phase is discharged from the exhaust port on the top of the cyclone separator, and the separated base liquid enters the base liquid storage ...

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Abstract

The invention relates to an anti-foaming method in foam drill, belonging to the oil drilling field. In the method solid phase, partial air phase and partial liquid phase can be separated by first-order cyclone separator. Not-separated foam enters into second-order anti-foaming centrifugal machine to separate air phase and liquid phase fully. The method can eliminate foam effectively in foam drilling process so that drilling matrix liquid can be used repeatedly. It is provided with convenient method, small cubage of anti-foaming device, light weight, few assistant equipment, low failure rate, decreased drilling cost and decreased circumstance pollution so on.

Description

technical field [0001] The invention relates to a defoaming method used in foam drilling in the field of petroleum drilling. Background technique [0002] In recent years, foam drilling technology has been widely used in our country. Foam drilling technology refers to the use of air, inert gas, foam, etc. as the drilling medium for drilling. Compared with conventional drilling, the use of foam drilling technology has the characteristics of increasing the rate of penetration, reducing drilling and completion costs, reducing formation damage, and increasing oil and gas production. However, the foam produced in foam drilling cannot be treated and recovered, and the used drilling base fluid is directly discharged into the waste liquid pool through the combustion pipeline, which cannot be recycled, so there are the following disadvantages: [0003] ①Because the base fluid cannot be recycled, the cost of foam drilling increases. [0004] ②The used drilling base fluid produces a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D19/02B04C9/00C09K8/38
Inventor 罗维陶冶胡军蒲荣聂世江鲁济勇唐亮
Owner WESTERN DRILLING KELAMAYI DRILLING TECH INST
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