Abstract
A flocculant (DES0-0) was synthesized by epichlorohydrin and diethylamine, followed by adding crosslinking agent such as ethylenediamine, diethylenetriamine and triethylenetriamine to obtain the crosslinked polymer DES0-1, DES0-2, DES0-3. The flocculation effect of DES0-1, DES0-2, DES0-3 and PAM was studied by measuring the volume, transmittance and particle size of the clarified solution after flocculation. The results showed that the flocculation effect of triethylenetetramine crosslinked polymer (DES0-3) and PAM was better. Meanwhile, the flocculation effect was more optimistic in the strong alkali environment.
Highlights
Drilling fluid was often used in modern oil and gas well drilling operations
In drilling operations, drilling fluids provided a series of important functions, such as preventing formation fluids from entering the wellbore, removing drill cuttings, suspending drill cuttings during drilling pauses, and keeping the drill bit cool and clean[15]
Rereagents involved in the experiment, such as epichlorohydrin, diethylamine, ethylenediamine, diethylenetriamine and triethylenetetramine, were purchased from Chengdu Kelong Chemical Reagent Factory
Summary
Drilling fluid was often used in modern oil and gas well drilling operations. In drilling operations, drilling fluids provided a series of important functions, such as preventing formation fluids from entering the wellbore, removing drill cuttings, suspending drill cuttings during drilling pauses, and keeping the drill bit cool and clean[15]. The harmless treatment of drilling fluid waste is only carried out from physical, chemical, biological and other aspects that including coagulation, adsorption, reverse osmosis, chemical oxidation and electrolysis, and biological treatment. It has been widely used in drilling wastewater treatment[6,7]. Polyamines are quaternary ammonium cationic polymers that have been used as flocculants and charge neutralizers in the pulp and mining industries. The cationic polymer neutralizes the charge by compressing the electric double layer, adsorbs and forms a bridge, and the removal rate is high[18,19]. After flocculation , the flocculation was evaluated by measuring in these aspects which and the particle size diameter of the floc and the volume of the supernatant and the light transmittance
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