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Method and system for treating drilling mud

A technology of drilling mud and treatment method, which is applied in the fields of sludge treatment, biological sludge treatment, water/sludge/sewage treatment, etc., can solve the problems of leakage pollution, unrealized safe disposal of hazardous solid waste, etc.

Pending Publication Date: 2018-09-14
北京三川世纪能源科技股份公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can seal up the mud for a short time, but most of the soluble pollutants in the mud have the risk of long-term leakage and pollution, and the safe disposal of hazardous solid waste has not been realized.

Method used

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  • Method and system for treating drilling mud
  • Method and system for treating drilling mud
  • Method and system for treating drilling mud

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0068] Example 2 The biological treatment system of the drilling mud solid waste advanced comprehensive treatment system

[0069] Such as figure 2 As shown, the biological treatment section in the deep comprehensive treatment system for drilling mud of the present invention mainly includes four parts: anaerobic, two-stage anoxic, two-stage aerobic and biochar filter.

[0070] After adjusting the pH, pollutant concentration and nutrient ratio in the adjustment tank, the mixed wastewater enters anaerobic treatment (1), inoculates the anaerobic treatment sludge of refinery plant, and controls the temperature and hydraulic retention time. Sulfate is reduced to sulfide, which combines with soluble metal ions to form metal sulfide precipitates.

[0071] After anaerobic treatment, the wastewater enters the anoxic-aerobic treatment section (2). The anoxic-aerobic segment consists of two stages of anoxic (A) and two stages of aerobic (O). The dissolved oxygen of the first-level hyp...

Embodiment 3

[0073] Embodiment 3 is used for the advanced treatment of the drilling mud of natural gas exploitation

[0074] Drilling mud solid waste produced by natural gas extraction while drilling is dehydrated by coagulation sedimentation filter press, with a water content of 60-70%, an oil content of 0.5-1.0% measured by gravimetric method, and a pH of 8.5.

[0075] Raise the temperature to 70-75° C. in a slurryer, and once slurry to a slurry with a solid content of 10-20%. Add 0.5-1.0% pretreatment agent, stir, precipitate, and remove the supernatant.

[0076] Slurry for the second time to a slurry with a solid content of 10-20%, add a deep scavenger at a ratio of 5-10%, stir, settle, and remove the supernatant.

[0077] Slurry the sediment three times to make a slurry with a solid content of 10-20%, stir it well, and send it to a filter press dehydration device for dehydration.

[0078] Pretreatment agent formula: 30% sodium lactate, 20% ammonium persulfate, 5% alkylsulfonate, 3% ...

Embodiment 4

[0092] Embodiment 4 is used for the advanced treatment of the drilling mud of oil extraction

[0093] Drilling mud solid waste produced while drilling in oil production is dehydrated by coagulation sedimentation filter press, with a water content of 60-70%, an oil content of 5.0-10.0% measured by gravimetric method, and a pH of 8.2-8.8.

[0094] A slurry with a solid content of 1-3% is prepared by primary slurrying, and a slurry with a solid content of 2-5% is produced by secondary slurrying, and other steps are the same as in Example 3.

[0095] Table 3 Changes in main technical indicators before and after drilling mud solid waste treatment

[0096]

[0097]

[0098] Table 4 Main technical indicators after treatment of mixed waste liquid generated from drilling mud solid waste treatment

[0099] project

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Abstract

The invention relates to the field of material conveying, and in particular discloses a method and a system for treating drilling mud. The method comprises the following steps: preparing primary treatment liquid, specifically, preparing the mud into slurry with a solid waste content of 5-20%, and then heating the slurry up to 70-75 DEG C with steam; precipitating the primary treatment liquid, specifically, adding 2-5% of a pretreatment agent into the slurry, stirring evenly and then standing so as to enable the solid waste of the primary treatment liquid to be fully precipitated; preparing secondary treatment liquid, specifically, filtering supernatant, obtained by precipitating the primary treatment liquid, with a carbon filter and then discharging into a primary waste liquid tank, and adding water into the precipitate to prepare the secondary treatment liquid with a solid waste content of 10-20%; precipitating the secondary treatment liquid, specifically, adding 5-10% of an advancedtreatment agent into the secondary treatment liquid, evenly mixing and standing so as to enable the solid precipitate in the secondary treatment liquid to be sufficiently precipitated.

Description

technical field [0001] The invention belongs to the field of drilling mud processing technical equipment, and in particular relates to a drilling mud processing method and a system thereof. Background technique [0002] Drilling mud is a mixture of oil, water, high molecular polymer, salt, additives, cuttings, etc. It plays a very important role in the drilling operations of oil field production, such as cooling drill bits and cuttings, preventing subsidence, sealing drilling, balancing Formation pressure, broken rock formation, entrained cuttings, etc. In order to maintain the quality of drilling operations, the drilling mud must be constantly replaced, resulting in a large amount of waste mud containing harmful substances such as oil, heavy metals, and polymers. Drilling waste mud is classified as hazardous waste and must be shipped out for proper disposal. [0003] At present, the drilling mud treatment technology mainly focuses on two aspects: mud solid control and was...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/04C02F11/12C02F9/14C02F101/30C02F101/32C02F101/10C02F101/16
CPCC02F9/00C02F11/04C02F11/122C02F11/127C02F2301/08C02F1/442C02F1/78C02F3/30C02F2101/16C02F2101/30C02F2101/105C02F2101/101C02F2101/32C02F2201/007
Inventor 郭海波
Owner 北京三川世纪能源科技股份公司
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