The drilling fluids and cuttings are the main sources of drilling waste in Taiwan. This research focused on the topics of reusing and resource recycling of drilling waste. Some specific recipes convert drilling wastes to building materials were investigated in this study. All the raw materials of these recipes come from waste drilling fluids and cuttings in drilling process of three different wells in Taiwan.

Considering the properties of waste, technology feasibility and product market, this study have tried to manufacture brick for building; permeable brick and concrete partial substitute from drilling waste and examine their properties with suitable specifications in laboratory. Detailed process for each product is described. The drilling wastes should be pretreated to become dry powders under 100 to 105 °C, which are the common raw materials for difference products.

According to the experimental result, the strength of permeable bricks produced from the recipe were between 350 to 1200 kgf/cm2 with permeability coefficient between 3.9×10-3 to 8.1×10-3 cm/sec (at 15 °C), which is met the CNS (Taiwan National Standard) specification requirements. The bricks for building have the strength between 110 to 280 kgf/cm2 after 7 days aged, which also fulfill the CNS specification. For the concrete partial substitute, even though the percentage of additive increased to 10% and 20%, the strength of samples still keep on 310 to 350 kgf/cm2, which are also conformed to CNS requirement.

Drilling wastes can be successfully converted into permeable bricks in this study, and all the end products meet CNS requirements. But it still needs more assessment to utilize the drilling waste as concrete partial substitute. The innovation is not only a new and cost-effective idea for drilling waste reutilization but also a great reduction of wastes impact during drilling process.

You can access this article if you purchase or spend a download.