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Water-based drilling fluid waste solid-liquid separation equipment and method

A technology of water-based drilling fluid and solid-liquid separation, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as difficulties and increased final treatment, and achieve treatment costs The effect of low cost, saving floor space and mild treatment conditions

Active Publication Date: 2014-03-12
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Application Information

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Problems solved by technology

The landfill method is relatively simple, but it is limited by the environment and site; the method of combining solidification and comprehensive utilization does not perform solid-liquid separation, and the volume of solidified waste does not decrease, which adds difficulties to the final treatment; the land cultivation method is only applicable to vast areas. And relatively flat terrain, and requires suitable soil structure; pumping into safe formation and annular space method is a method of limited use; closed loop system method must be used when it is economical

Method used

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  • Water-based drilling fluid waste solid-liquid separation equipment and method
  • Water-based drilling fluid waste solid-liquid separation equipment and method
  • Water-based drilling fluid waste solid-liquid separation equipment and method

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Embodiment Construction

[0029] Such as figure 2 and image 3 As shown, a water-based drilling fluid waste solid-liquid separation equipment is built at the well site. The dispensing skid 1 is a two-layer steel frame structure. A ladder 2-1 is provided at the end of the dispensing skid for workers to enter the upper layer. The upper layer is also equipped with Guardrail 2-2, medicine tank 2-6 is installed on the lower floor, there are multiple medicine chambers in the medicine tank for containing different medicines, organic flocculants and inorganic flocculants are placed in different medicine chambers, and medicine tanks pass through The pipeline is connected with a dispensing funnel 2-9 and a centrifugal pump 2-10, and a plurality of agitators 2-4 and automatic feeders for dosing are installed on the medicine tank, all of which are used to complete the dispensing and adding of medicines. The other side is connected with diaphragm metering pump 2-5 by pipeline, and diaphragm metering pump has mult...

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Abstract

The invention provides water-based drilling fluid solid-liquid separation equipment and method. A flocculant and the like are added into the pretreated water-based drilling fluid waste, and the water and solid phase are centrifuged and separated out through a centrifuge to realize solid-liquid separation. The separated wastewater reaches the standard after secondary flocculation and filtration treatment and can be recycled at the well site or discharged, and the separated waste residue reaches the standard for stacking after curing treatment. After the water-based drilling fluid waste is treated by the method, the main pollutant indexes of the leachate of the wastewater and waste residue reach the GB8978-1996 Integrated Wastewater Discharge Standard (second-level requirements).

Description

technical field [0001] The invention relates to a drilling fluid waste treatment equipment and method, in particular to a water-based drilling fluid waste solid-liquid separation equipment and method. Background technique [0002] Water-based drilling fluid waste is a pollutant produced during oil drilling. It is a complex multiphase system containing mineral oil, phenolic compounds and heavy metals, and its leachate has high toxicity. Oilfield drilling produces a large amount of water-based drilling fluid waste every day. The direct discharge of water-based drilling fluid waste will affect the nutritional environment and quality of crop growth. Long-term accumulation will cause serious damage to surface vegetation, pollute soil and water sources, endangering human survival. At present, the harmless treatment methods of water-based drilling fluid commonly used at home and abroad mainly include the following types: 1. Landfill method 2. Combination of solidification and com...

Claims

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Application Information

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IPC IPC(8): C02F9/08
Inventor 彭春耀杨金荣刘义元刘洪涛张鑫
Owner BC P INC CHINA NAT PETROLEUM CORP
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