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AssigneeSouthwest Petroleum University
InventorsYang Bai, Pingya Luo, Yan Cheng, Jinsheng Sun, Guancheng Jiang
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The invention relates to the field of drilling fluid, and provides a multi-functional weighting agent for drilling fluid and preparation method thereof, and water-based drilling fluid and use thereof, wherein the multi-functional weighting agent is an polyacrylamide/modified barium sulfate composite multi-functional weighting agent prepared by sequentially dropwise adding acrylamide and ammonium persulfate to a mixture of modified barium sulfate and deionized water in a presence of an initiator.
A multi-functional weighting agent having a composite structure, comprising polyacrylamide, and modified barium sulfate, wherein the modified barium sulfate and the polyacrylamide are in a ratio by weight in a range of from about 4:5 to about 5:2.
Dependencies are inferred from the claim text.