USE OF CSH SUSPENSIONS IN CEMENTING OF WELLS Russian patent published in 2016 - IPC C09K8/467 E21B33/138 

FIELD: chemistry.

SUBSTANCE: invention relates to use of setting accelerator composition for non-organic binding substances, which contains at least one water-soluble comb polymer, includes (meth)acrylic acid structural units, maleic acid, polyalkyleneglycol vinyl esters, polyalkyleneglycol allylic ethers and polyalkyleneglycol ethers of (meth)acrylic acid and calcium silicate hydrate particles in cementing oil and gas drilling wells in permafrost regions and in shelf zone, wherein comb-shaped polymer is copolymer, which has side chains containing polyester functional groups on main chain, as well as acid functional groups, and calcium silicate hydrate particles are less than 5 mqm, preferably less than 1 mqm, more preferably less than 500 nm, particularly preferably is less than 200 nm and especially is less than 100 nm.

EFFECT: invention is developed in subclaims.

13 cl, 1 dwg, 1 tbl