The invention discloses a production method of a
polymer for a
drilling fluid, comprising the following steps: dissolving 2-methyl-2- acyloxy propyl
sulfonate in water, then adding water in equimolar
sodium hydroxide, stirring for dissolving and cooling, mixing the two mixtures and then adding a proper amount of
acrylamide and
acrylic acid, stirring for dissolving, heating up the mixed liquid to 35 DEG C with introducing
nitrogen, then adding an initiating agent having an amount accounting for 0.05-0.08 % of the total weight of
acrylamide and
acrylic acid, uniformly stirring, then introducing
nitrogen for a certain time, reacting for 8-10 h at a constant temperature of 35 DEG C to obtain a gel product,
cutting and pelleting the gel product, and
drying to obtain the
polymer for the
drilling fluid. The
polymer produced by the invention has
strong salt resistance and
calcium pollution resistance, strong ability to inhibit clay hydrating and dispersing, and strong
flocculation and
coating capacities, can be applied in
fresh water drilling fluid, salt-water drilling fluid, saturated salt-water drilling fluid,
seawater drilling fluid and other drilling fluids, and has good compatibility with other treating agents to drilling fluid.