Processes for the drilling in Rocks containing Shale MINED materials where the rocks are dragged by the drilling fluid and the disintegration of the eSquistos is inhibited by the aqueous Fluid Drilling

摘要

Reveal to Drilling and aqueous Fluids to reservoirs, which comprises Polymer inhibitors of Shales and clays, dissolved in the Fluid, and are formed by 50 to 100% molarMonomers of formula (i), wherein: R1 is selected from H and alkyl groups 1 to 4 carbon Atoms in; R2 is selected from alkyl groups 1 to 4 carbon ATOMS,- (CH3) 2ch2coch3, - ch = CH2 - C (CH3) = CH2; R3 is selected entreh, alkyl groups of 1 to 4u00e1t omos carbon, CH2 = CH and CH2 = C (CH3); in whichIf R3 is H or alkyl with 1 to 4 carbon ATOMS, then R1 is H and r2es - ch = CH2 or - C (CH3) = CH2. When R2 is (CH3) 2ch2coch3, then R1 is H, 0 to 50% molarOther unsaturated monomers noiu00f3nico s etilu00e9nicamente; and from 0 to 20% molar Ionic etilu00e9nicamente unsaturated monomers and the polymer has a Molecular Weight of less than 1 million.It also intends to perforarpozos in Rocks containing Shale conaplicaciu00f3n D ichos Polymers and the use of such Polymers in the formulation of drilling fluids.