Patent ID: 7052543

Claim:
A permeable cement composition comprising: a hydraulic cement; a diluent; graded sand; particulate matter selected from the group consisting of gilsonite, oil soluble particles and mixtures thereof; and a surfactant selected from the group consisting of surfactants corresponding to the following formulas: (a) RO(CH 2 CH 2 O) n R′ where R and R′ are alkyl groups and n is an integer in the range of about 5 to about 50; (b) RPhO(OCH 2 CH 2 ) m OH, wherein R is an alkyl group having from about 5 to about 30 carbon atoms, Ph is phenyl and m is an integer in the range of from about 5 to about 50; (c) R 1 (OR 2 ) n SO 3 X, wherein R 1 is selected from the group consisting of (i) alkyl groups having from 1 to about 30 carbon atoms, (ii) cycloalkyl groups having 5 or 6 carbon atoms, (iii) C 1 –C 4 alkyl substituted cycloalkyl groups, (iv) phenyl, alkyl substituted phenol of the general formula (R 3 ) a Ph-, wherein Ph is phenyl, R 3 is an alkyl group having from 1 to about 18 carbon atoms and a is an integer of from 1 to 3, and (v) phenyl-alkyl groups wherein the alkyl groups have from 1 to about 18 carbon atoms and the phenyl-alkyl groups have a total of from about 8 to about 28 carbon atoms; R 2 is a substituted ethylene group of the formula —CH 2 CH 2 R 4 , wherein R 4 is selected from hydrogen, methyl, ethyl or mixtures thereof; n is a number from 0 to about 40 provided that when R 1 is phenyl or alkyl substituted phenyl, n is at least 1; and X is any compatible cation; (d) R 5 -Ph(OR 6 ) o SO 3 X, wherein R 5 is an alkyl radical having in the range of from 1 to about 9 carbon atoms, R 6 is the group —CH 2 CH 2 —, o is an integer from about 10 to about 20 and X is a compatible cation; (e) R 7 (OR 8 ) p SO 3 X, wherein R 7 is an alkyl group having in the range of from about 5 to about 20 carbon atoms, R 8 is the group —CH 2 CH 2 —, p is an integer in the range of from about 10 to about 40 and X is a compatible cation; and, (f) mixtures thereof.