Method for processing waste slurry

A treatment method and waste mud technology, applied in water/sludge/sewage treatment, dehydration/drying/thickened sludge treatment, chemical instruments and methods, etc., can solve the problem of high construction cost and treatment cost, natural environment, groundwater source Hidden dangers of ecological pollution, environmental pollution and other issues, to achieve the effect of eliminating environmental pollution risks, significant economic benefits, and saving land resources

Active Publication Date: 2009-09-23
北京华盛坤泰环境科技股份有限公司
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Problems solved by technology

This method not only occupies a large amount of land resources (each well occupies an area of ​​2-5 mu), but also has high construction costs and processing costs, and actually does not treat hazardous wastes-drilling waste mud, effluent mud and cuttings ( Included in the 2008 Solid Hazardous Waste List of

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  • Method for processing waste slurry
  • Method for processing waste slurry
  • Method for processing waste slurry

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Embodiment Construction

[0047] The present invention will be further described below in conjunction with drawings and embodiments.

[0048] This embodiment adopts three processing units to realize the whole processing technology, and the processing flow is as follows: image 3 Shown:

[0049] 1. The first unit is mainly used to collect the hazardous drilling waste mud discharged from the drilling rig. First, it enters the screw conveyor, and then enters the sand and gravel separation device through the screw conveying and stirring. After stirring, washing and spiral separation, a large amount of mud contained in the mud is Inorganic particles and small rock pieces, cuttings, etc. are separated to alleviate and reduce the impact of such substances on subsequent processing.

[0050] figure 1 It is a schematic diagram of a sand and gravel separation device in the form of a fixed sieve, including a box-shaped tank 1, and a cylindrical funnel-shaped fixed sieve 2 is arranged in the tank 1, and an anchor...

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Abstract

The invention discloses a method for processing waste slurry, comprising the following steps: firstly, a sand-stone segregation apparatus separates, washes and discharges the drill cuttings sand and stone in the slurry; the pH value of the remaining slurry is adjusted and the COD value thereof is reduced; the solid and the liquid are separated from each other in a way of composite flocculating; water solution is separated out from the solid in a way of mechanical drying; the dried solid isolate meets the relative standard so as to be processed in a way of stacking or land filling; finally the separated water solution is processed in a way of filtration and reverse osmosis so as to obtain fresh water which is recycled or discharged on the spot. The method can be carried out by matching with an unit device and make continuously impending treatment of the well drilling waste slurry during drilling synchronously with normal well drilling production so as to continuously process the efflux hazardous waste to meet the discharge standard with out loading in the well drilling of oil-gas field, change the prior traditional whole efflux curingprocess mode, and fills the gap of an environmentally friendly governing field of oil drilling in the domestic.

Description

technical field [0001] The invention relates to the treatment of hazardous waste discharged during the drilling process of oil and gas fields, in particular to a harmless and up-to-standard treatment method for waste drilling mud. Background technique [0002] During the drilling process of oil and gas wells, the drilling fluid mixed with complex chemicals undergoes physical changes at high temperature and high pressure thousands of meters underground, and carries a large amount of cuttings and sandstones from the ground, which are discharged from the wellhead and become concentrated Slurry hazardous waste. For a long time, my country has adopted a method of collecting hazardous wastes (waste mud, effluent mud, and drill cuttings) from drilling in oil and gas fields in a waste mud pool dug near the drilling rig, and then solidifying and burying them. This method not only occupies a large amount of land resources (each well occupies an area of ​​2-5 mu), but also has high co...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F1/66C02F1/52C02F1/44C02F1/28C02F1/38C02F11/12
Inventor 司军吕允谦
Owner 北京华盛坤泰环境科技股份有限公司
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