Four-phase solid-liquid separation method for well drilling wastes

A drilling waste, solid-liquid separation technology, applied in chemical instruments and methods, water/sludge/sewage treatment, sludge treatment, etc., can solve problems such as groundwater pollution, COD, and difficulty in chromaticity

Active Publication Date: 2008-10-08
PUYANG TIANDIREN ENVIRONMENTAL PROTECTION TECH CO LTD
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Problems solved by technology

What's more serious is that the leachate oil, COD, and chroma of waste after burial are difficult to meet the standards, and will still cause serious pollution to groundwater

Method used

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  • Four-phase solid-liquid separation method for well drilling wastes

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Embodiment Construction

[0014] The present invention adopts pre-control, aims at eliminating the pollution of the drilling mud pool and reducing land occupation, and realizes that the drilling waste returned from the wellhead can be treated while drilling before landing, and the waste mud in the waste mud pool can also be diluted before to process. The principle of the process is that according to the different particle sizes and properties of the drilling waste, the cuttings are washed and separated in sequence, the settled sludge is pressed into a mud cake, the filtrate is formed into sewage, and the floating waste oil is automatically overflowed and discharged, so that the drilling waste is formed. The four phases are separated, creating conditions for subsequent classification, reprocessing and comprehensive utilization, so as to meet the environmental protection requirements of drilling waste not falling to the ground.

[0015] The process of the solid-liquid separation device for drilling waste...

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Abstract

Disclosed is a technique method for the solid-liquid four-phase separation of well drilling wastes, which is a technique for realizing the four-phase separation of well drilling detritus, well drilling mud, well drilling sewage and dirty oil in the well drilling wastes, and the technique has the goal that the wastes do not fall to the ground while drilling when equipping the well drilling scene and in treatment, and has the technique principles that: detritus are separated out by washing, settled sludge is pressed into mud cakes, filtrate forms sewage and dirty oil floats upward and is discharged by automatic overflow sequentially according to different particle sizes and properties of particles of the well drilling wastes, then the four phases are separated for providing conditions for classification, retreatment and comprehensive utilization, thereby realizing the demand of environmental protection that the well drilling wastes do not fall to the ground.

Description

1. Technical field: [0001] The invention relates to a process technology for four-phase solid-liquid separation and drilling treatment of drilling waste in oil and gas fields, in particular to a four-phase solid-liquid separation method for drilling waste. 2. Background technology: [0002] Drilling waste in oil and gas fields is a mixture of drilling cuttings, drilling mud, drilling sewage and a small amount of dirty oil. The main chemical components harmful to the environment are hydrocarbons, salts, various polymers, heavy metal ions, sundries in barite and asphalt and other modified substances. These pollutants have high chroma, high petroleum, High COD, high suspended solids, high salinity and other characteristics are the main pollutants produced in the process of petroleum exploration and development. Every time a well is drilled in an oil and gas field, an abandoned mud pool is left in place. There are tens of thousands of wells in an oil and gas field, and there a...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00
Inventor 赵晓宁郭学峰茆明军
Owner PUYANG TIANDIREN ENVIRONMENTAL PROTECTION TECH CO LTD
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