Environment-friendly high-density solid-free weighting agent and preparation method
A high-density, solid-free technology, applied in the fields of drilling fluids and completion fluids, can solve problems such as poor stability against high temperature and high pressure, corrosion, and low density of completion fluids, and achieve low corrosion, good rheology, and moderate price Effect
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[0037] An environment-friendly high-density non-solid phase weighting agent, its components are proportioned as follows by weight fraction:
[0038] Dispersant: 0.02 to 0.05 parts;
[0039] Tackifier: 0.3 to 1 part;
[0040] Chelating agent: 0.5 to 1.2 parts;
[0041] Corrosion inhibitor: 0.6~2 parts;
[0042] Soluble Weighted Material: Balance.
[0043] Specifically, the dispersant is selected from one or both of sodium polyacrylate and phosphonocarboxylic acid copolymer.
[0044] Specifically, the thickener is selected from one or more of chitosan, agar, polyacrylamide, xanthan gum, and hydroxypropyl methylcellulose. Preferably, the thickener is one or both of xanthan gum and hydroxypropyl methylcellulose.
[0045] Specifically, the chelating agent is one or both of aminophosphonic acid chelating resin and disodium edetate.
[0046] Specifically, the corrosion inhibitor is one or both of polycarboxylic acid and sodium gluconate.
[0047] Specifically, the soluble weig...
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