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Method for removing oil-containing drill cuttings and oil component in oil polluted soil

A technology polluted by oil and oil components, applied in the restoration of contaminated soil, etc., can solve problems such as limited processing capacity, low safety, soil pollution, etc., achieve great economic and environmental advantages, increase economic benefits, and reduce solvents The effect of dosage

Inactive Publication Date: 2008-09-24
TIANJIN DEV ZONE LANDUN OILFIELD SERVICE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

People try every means to remove the oil in oily sludge: this includes injection into annular space or safe formation, incineration method, heat treatment method (distillation method), drilling cuttings cleaning technology, the main disadvantages of these methods are poor efficiency and low safety , limited processing capacity
[0004] Similarly, in the process of land drilling and oil transportation, storage and processing, oil spills and leaks will occur, which will pollute the soil

Method used

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  • Method for removing oil-containing drill cuttings and oil component in oil polluted soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Solvent oil and oily drilling cuttings are mixed in a mixer at a weight ratio of 0.5, thereby forming a mixture of a solid phase and a liquid phase composed of organic solvent and oil; the mixture is sent to a filter dryer for a First-level solid-liquid separation to obtain first-level solid-phase materials and first-level liquid-phase materials; the first-level liquid-phase materials are sent to a centrifuge for second-level solid-liquid separation to obtain second-level solid-phase materials and second-level liquid phase materials ; sending the first-level solid-phase material into a dryer for drying and landfill; sending the second-level solid-phase material back to the mixer to form a new solid-liquid mixture; The grade liquid phase material is sent to the solvent evaporator, and at a temperature of 85°C and a pressure of 0.1Mpa, the solvent oil is separated and sent to the mixer for recycling; the solvent oil separated by the evaporator is Drilling fluid oil base i...

Embodiment 2

[0021] Ethyl acetate and oily cuttings are mixed in a mixer in a weight ratio of 1 to form a mixture of a solid phase and a liquid phase consisting of organic solvent and oil; said mixture is sent to a filter dryer for First-level solid-liquid separation to obtain a first-level solid phase material and a first-level liquid phase material; sending the first-level liquid phase material into a centrifuge for second-level solid-liquid separation to obtain a second-level solid-phase material and a second-level liquid phase material; sending the first-level solid-phase material into a dryer for drying and landfill; sending the second-level solid-phase material back to the mixer to form a new solid-liquid mixture; The secondary liquid phase material is sent to the solvent evaporator, and at a temperature of 90°C and a pressure of 0.1Mpa, the ethyl acetate is separated and then sent to the mixer for recycling; it will be separated by the evaporator Purify and decolorize the oil base o...

Embodiment 3

[0023] Butyl acetate and n-hexane and oil-contaminated soil are mixed in a mixer in a weight ratio of 2, thereby forming a mixture of a solid phase and a liquid phase composed of an organic solvent and oil; sending the mixture to into the filter dryer for primary solid-liquid separation to obtain primary solid phase materials and primary liquid phase materials; send the primary liquid phase materials to a centrifuge for secondary solid-liquid separation to obtain secondary solid phase materials and the secondary liquid phase material; the primary solid phase material is sent to a drier for drying and landfill; the secondary solid phase material is sent back to the mixer to form a new solid-liquid mixture ; The secondary liquid phase material is sent into a solvent evaporator, and at a temperature of 90°C and a pressure of 0.1Mpa, the described n-hexane is separated, and at a temperature of 93°C and a pressure of 0.1Mpa, the The above-mentioned butyl acetate is separated, and t...

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Abstract

The invention discloses a method for removing oil in drill cuttings containing oil and soil contaminated from oil. The method includes the following steps: an organic solvent and drill cuttings containing oil or soil contaminated from oil are mixed in a mixer according to the weight ratio of 0.2:2; the mixture is sent into a drainer for one-step liquid-solid separation so as to get one-step solid phase materials and one-step liquid phase materials; the one-step liquid phase materials are sent to a centrifuge for second-stage liquid-solid separation so as to get second-stage solid phase materials and second-stage liquid phase materials; the one-step solid phase materials are sent to a drier for drying and solid phase disposition; the second-stage solid phase materials are sent to the mixer; the second-stage liquid phase materials are sent to a solvent evaporator; the organic solvent is separated and sent to the mixer for recycling; the oil-base drilling fluid separated by the evaporator is cleaned and decolored. The method provided by the invention reaches the purpose of pollution-free processing of soil contaminated from oil or drill cuttings containing oil, besides, the oil can be recycled, thereby increasing the economic benefits.

Description

technical field [0001] The invention relates to a method for removing oil components, in particular to a method for removing oil components in oil-containing drilling cuttings and soil polluted by oil. Background technique [0002] The function of the drilling mud is to protect the well wall, prevent corrosion of metal parts, cool and lubricate the drill bit, downhole pressure control, and most importantly, transport the continuously produced cuttings to the surface. Oil-based mud has many advantages and is widely used. Drilling cuttings contaminated by oil-based mud will cause many environmental problems and must be treated to achieve the purpose of environmental protection. At the same time, recovery of oil-based mud has great economic significance and can save drilling costs. [0003] In the past, drill cuttings, especially from offshore platforms, have been discharged into the sea, causing immeasurable damage to the environment. Disposal of drilling cuttings scattered ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00B09C1/08
Inventor 郑大勇张辉程秀于胜宇林大明
Owner TIANJIN DEV ZONE LANDUN OILFIELD SERVICE
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