A method for making bricks from drilling waste

Abstract

The invention discloses a well drilling waste brick making method. The well drilling waste brick making method comprises the following steps that dirt elimination and desiccation treatment is conducted on well drilling waste to be treated with a dirt elimination and desiccation agent; a construction binding material and a construction aggregate are added to the well drilling waste, to be treated, obtained after dirt elimination and desiccation treatment, even mixing is conducted, and then a brick making mixture is obtained; the brick making mixture is solidified and pressed to be green bricks with the density not smaller than 80% by means of a static pressure type brick making machine; strength maintenance is conducted on the green bricks; the green bricks obtained after strength maintenance is completed are sprinkled or coated with waterborne waterproof coating or dipped in the waterborne waterproof coating, so that an environment-friendly blocking layer with the thickness being 1-10 mm is formed on the surfaces of the green bricks obtained after strength maintenance is completed, and then the finished bricks are made. By the adoption of the well drilling waste brick making method, the well drilling waste can be processed into the brick making raw material which is loose and dry and meets relative environment-friendly standard at a low cost, the brick making raw material can be finally made into the finished bricks which are ideal in compressive strength, ageing resistance, hydrolysis resistance, freezing-thawing resistance, corrosion resistance and environmental protection stability, and therefore harmless and resourceful treatment of the well drilling waste is achieved.

Description

technical field [0001] The invention relates to the technical field of drilling waste treatment, in particular to a method for making bricks from drilling waste. Background technique [0002] Drilling waste is the waste generated during the deep drilling and exploitation of oil, natural gas or other minerals. Among them, the largest amount and the most urgent treatment are waste drilling mud and cuttings. Drilling waste mud and cuttings are two types of drilling waste with complex composition, viscous or semi-fluid appearance, large color, poor gradation, high viscosity, high pH value, high liquid phase content and extremely slow natural drying process. Dried solids are easy to form drilling waste mud samples again after being soaked in water, which will have long-term adverse effects on the environment at the discharge point and nearby areas, and bring great harm to human life. [0003] At present, the drilling waste treatment method mainly uses a combination of chemical f...

AI Technical Summary

Problems solved by technology

However, since a large amount of surfactants in the drilling fluid are adsorbed on the solid particles of drilling waste, the electrical layer and water film around the particles are thick and viscous, difficult to disperse, and cannot be fused with external substances, and many solidified materials cannot wrap them to form The continuous phase is solidified; and many pollutants have not been completely eliminated; in addition, most of the components of these drilling fluid substances have a retarding effect on cement and other solidified materials. Therefore, the indicators such as the compressive strength of the produced bricks are not ideal.

[0006] (2) There is no ideal brick-making equipment and method

[0007] (3) The performance and environmental stability of non-sintered bricks are not ideal

At present, there is no information showing what kind of environmental protection control measures have been taken for this kind of bricks.

[0008] (4) The consumption of drilling waste is small and the cost is high

Some drilling waste brick-making technologies require auxiliary materials that account for more than 60% of the brick-making materials. The cost is too high, the consumption of drilling waste is too small, and the performance and environmental protection indicators of the bricks can not be fully achieved. Relevant standards have little significance for the treatment of drilling waste

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