Waste oil based mud recycle and application method

An oil-based mud and oil phase technology, which is applied in earthwork drilling, wellbore/well components, flushing wellbore, etc., can solve the problem that solid phase resources are not fully utilized, material closed-loop recycling cannot be formed, and oil phase recycling Solve problems such as separation and treatment, and achieve the effect of low aromatic hydrocarbon content, fast filtration speed and easy filtration

Inactive Publication Date: 2018-11-13
河北华运鸿业化工有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method separates waste oil-based mud into three phases of oil, gas and water, the obtained oil phase is mixed oil, and the oil phase is not re-separated. The obtained oil can only be used for other purposes and cannot be directly reused in oil-based mud. In the process, it is impossible to form a closed-loop recycling of materials
In addition, the residue after distillation is used as briquette raw material, and the slag is used for road paving or landfill, and the solid phase resources have not been fully utilized

Method used

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  • Waste oil based mud recycle and application method
  • Waste oil based mud recycle and application method
  • Waste oil based mud recycle and application method

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Effect test

Embodiment 1

[0036] A method for recycling waste oil-based mud. First, the solid phase, oil phase, and water phase in the waste oil-based mud are subjected to three-phase separation, and then the separated oil phase is subjected to three-phase separation again, and the three-phase separation is performed twice. The obtained oil phases are combined and then added with an adsorbent, and then rectified and separated to obtain white oil and mixed emulsified oil, including the following steps:

[0037] A. Heat the waste oil-based mud to 80°C, then add 2% aluminum sulfate of the weight of the waste oil-based mud, stir for 20 minutes, and centrifuge with a decanter centrifuge at a centrifugal speed of 800r / min to obtain a first-grade solid mud, Primary oil phase, primary water phase;

[0038] B. The primary oil phase is centrifuged with a disc centrifuge, and the centrifugal speed is 3000r / min to obtain secondary solid mud, secondary oil phase, and secondary water phase;

[0039] C. Combine the ...

Embodiment 2～5

[0044] Embodiments 2 to 5 are the same as the above-mentioned production process steps, except that the process parameters, or the selected flocculant and adsorbent, are as shown in Table 1 below, wherein the flocculant addition (%) is the percentage of flocculant The percentage of waste oil-based mud weight, the amount of adsorbent added (%) is the percentage of adsorbent in the combined oil phase weight.

[0045] Table 1

[0046]

[0047]

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PUM

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Abstract

The invention discloses a waste oil based mud recycle and application method. Solid, oil and water three-phase separation is conducted to waste oil based mud; three-phase separation is carried out onthe oil phase; an absorbing agent is added into combined oil to conduct decolorization and deodorization; and distillation separation is carried out to obtain white oil and mixed emulsified oil. The oil phase, the solid phase and the water phase can be separated at the same time, and the white oil and the mixed emulsified oil can be obtained through the oil phase after absorption, the decolorization and the distillation separation. The oil phase is fully recycled. The whole processing procedure of the waste oil based mud is free of waste and secondary pollution, and harmless treatment and resource recycling of the waste oil based mud are achieved.

Description

technical field [0001] The invention relates to a method for recycling waste, in particular to a method for recycling drilling mud, which belongs to the field of waste treatment in drilling engineering. Background technique [0002] Oil-based mud, also known as oil-based drilling fluid, is composed of water, oil, organic clay and oil-soluble chemical treatment agents. Oil-based mud can resist high temperature and salt and calcium erosion, and it is beneficial to the stability of wellbore wall, good lubricity and less damage to oil and gas layers during drilling. With the continuous development of the petroleum industry, the exploration and development of deep wells and ultra-deep wells are increasing, and the use of oil-based mud in drilling projects is becoming more and more extensive. In the process of drilling with oil-based mud, a large amount of waste oil-based mud will be produced. The waste oil-based mud mainly contains solid phase, oil phase and water phase. The sol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B21/06
CPCE21B21/063E21B21/066
Inventor 张占山
Owner 河北华运鸿业化工有限公司
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