Drilling waste drying agent as well as preparation method and use method thereof

Abstract

The invention discloses a drilling waste drying agent as well as a preparation method and a use method thereof. The drilling waste drying agent contains a first component and a second component which are respectively and independently packaged, wherein the weight ratio of the first component to the second component is (0.1-5) to (1-10); the first component contains magnesium sulfate, sulphamic acid, magnesium chloride and aluminium sulfide in a weight ratio of (60-80) to (0.5-5) to (10-30) to (5-15); and the second component is quick lime with a CaO content of higher than 70%. By utilizing the drilling waste drying agent, drilling waste can be processed into an incompact, dried, clean, neat and high-plasticity material with a wide terminal processing surface; and furthermore, the drilling waste drying agent is small in dosage, low in cost, strong in operability and suitable for the drilling waste with a liquid phase content of not higher than 97%, and a solid-liquid separation link in a preliminary discharging stage can be omitted.

Description

technical field [0001] The invention relates to the technical field of drilling waste treatment, in particular to a drying agent for drilling waste and its preparation method and use method. Background technique [0002] During the deep drilling and exploitation of oil, natural gas or other minerals, a large amount of drilling waste will inevitably be produced (drilling waste is mainly drilling waste mud and cuttings). These drilling wastes contain a large amount of chemical additives (such as: hydrocarbons, salts, various polymers, surfactants, organic treatment agents and alkalis, etc.), sewage, dirty oil, drilling cuttings, heavy metals (such as : Mercury, copper, arsenic, chromium, zinc, lead and impurities in barite) and other harmful substances, and COD (Chemical Oxygen Demand, chemical oxygen demand) is high. If these drilling wastes are not disposed of in a safe and harmless manner or are disposed of improperly, they will have long-term adverse effects on the enviro...

AI Technical Summary

Problems solved by technology

But there are at least the following problems in these special mud curing agent products and treatment methods: ①The main components of these special mud curing agent products are some curing materials. Although the drilling waste treated by these special mud curing agent products loses fluidity, they are still Viscous colloid, after solidification, becomes moist soil lumps, with poor plasticity and unstable strength. The choice of terminal disposal is narrow, and it is only suitable for landfill

②The amount of these special mud curing agents is relatively large, and the maximum amount reaches 40% of the total mass of drilling waste, which increases the cost of raw materials, transportation, labor, etc.

③The amount of other auxiliary materials used in the use of these special mud curing agents is relatively large, and a certain amount of sand and gravel materials need to be added before or during curing, which increases the cost and the terminal amount of waste

⑤ The raw materials of these special mud curing agents are relatively complicated, and the links of procurement, production, and transportation are difficult and costly

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