Donald B Siano

US Patent:

6734144, May 11, 2004

Filed:

Mar 28, 2001

Appl. No.:

09/819331

Inventors:

Ramesh Varadaraj - Flemington NJ
James R. Bragg - Houston TX
Monte K. Dobson - Bellaire TX
Dennis G. Peiffer - Annandale NJ
John S. Huang - Annandale NJ
Donald B. Siano - Westfield NJ
Cornelius H. Brons - Washington NJ
Chester W. Elspass - Alpha NJ

Assignee:

ExxonMobil Upstream Research Company - Houston TX

International Classification:

C09K 706

US Classification:

507103, 507203, 507904, 507906, 507108, 507207, 507140, 507145, 507267, 507269, 507277, 516 22, 1663051

Abstract:

A method for enhancing the stability of a solids-stabilized water-in-oil emulsion by pretreating the oil prior to emulsification. The pretreatment step can be accomplished by adding dilute acid to the oil, adding a lignosulfonate additive to the oil, sulfonating the oil, thermally oxidizing the oil, thermally treating the oil in an inert environment, and combinations thereof. The emulsion can be used in enhanced oil recovery methods, including using the emulsion as a drive fluid to displace hydrocarbons in a subterranean formation, and using the emulsion as a barrier fluid for diverting flow of fluids in the formation.

US Patent:

20010020531, Sep 13, 2001

Filed:

Dec 18, 2000

Appl. No.:

09/739307

Inventors:

Ramesh Varadaraj - Flemington NJ, US
Donald Siano - Westfield NJ, US
Jan Bock - Oxford, GB

International Classification:

E21B043/22
C09K007/02

US Classification:

166/270100, 166/270000, 507/225000, 507/261000

Abstract:

The present invention is related to an aqueous composition of at least one hydrophobically associating polymer and at least one surfactant, the mixture's viscosity being substantially constant or increased over temperatures ranging from about 20 C. to about 100 C. In another embodiment, the invention is related to a method for recovering oil from a subterranean reservoir by injecting into the reservoir a mixture of at least 100 to 25,000 ppm of a hydrophobically associating polymer per million parts by weight of water, about 25 to about 7,500 parts by weight per million parts by weight of water of one or more surfactants; and from about 0.5 wt. % to about 10 wt. %, based on the weight of water, of salts selected from the group consisting of alkali and alkaline earth metal halides and mixtures thereof.

US Patent:

46940588, Sep 15, 1987

Filed:

May 27, 1986

Appl. No.:

6/866724

Inventors:

Donald B. Siano - Fanwood NJ
Jan Bock - Bridgewater NJ

Assignee:

Exxon Research and Engineering Company - Florham Park NJ

International Classification:

C08F22070

US Classification:

5263072

Abstract:

Novel water soluble copolymers of acrylamide, oil soluble higher alkylacrylamide and alkali metal acrylate have been found to provide efficient viscosification of water or brine. The process for synthesizing them relies on the complete solubilization of the water insoluble monomer into an aqueous solution of the water soluble monomer(s) by means of a suitable water soluble surfactant. A redox initiator system is used in conjunction with high monomer concentration and a low reaction temperature. The surfactant chosen and its concentration is one that produces a clear, uniform, homogeneous mixture in the presence of the monomers and gives a product which remains a clear uniform, homogeneous mixture with no phase separation as the reaction proceeds toward completion. The molecular weight of the resulting polymer after isolation from the surfactant is sufficiently high that it gives an intrinsic viscosity greater than about 12 dl/g.

US Patent:

45201820, May 28, 1985

Filed:

Aug 29, 1983

Appl. No.:

6/526991

Inventors:

S. Richard Turner - Rochester NY
Donald B. Siano - Fanwood NJ
Jan Bock - Bridgewater NJ

Assignee:

Exxon Research & Engineering Co. - Florham Park NJ

International Classification:

C08F 2056

US Classification:

5263072

Abstract:

Water soluble acrylamide/alkylacrylamide copolymers which are efficient viscosifiers of water or brine are described. They are made by processes which finely disperse the water insoluble alkylacrylamide into a water-external microemulsion or a micellar surfactant solution.

US Patent:

45283486, Jul 9, 1985

Filed:

Aug 29, 1983

Appl. No.:

6/527108

Inventors:

S. Richard Turner - Rochester NY
Donald B. Siano - Fanwood NJ
Jan Bock - Bridgewater NJ

Assignee:

Exxon Research & Engineering Company - Florham Park NJ

International Classification:

C08F 226
C08F 228
C08F 230

US Classification:

526225

Abstract:

The copolymerization of water soluble monomers with water insoluble monomers can be effected by using a solution of a water soluble surfactant to solubilize the water insoluble monomer. The aqueous medium containing the surfactant and water insoluble monomer is therefore a homogeneous, isotropic, transparent dispersion, into which the water soluble monomer can be dissolved and, after addition of a suitable free radical initiator, can be copolymerized to give a reaction mixture which does not phase separate, or contain substantial amounts of particulates of insoluble monomer. The copolymers which may be isolated from the reaction mixture are good viscosifiers of water and brine.

US Patent:

H5770, Feb 7, 1989

Filed:

Dec 28, 1987

Appl. No.:

7/137929

Inventors:

Jan Bock - Bridgewater NJ
Ralph M. Kowalik - Bridgewater NJ
Donald B. Siano - Fanwood NJ
S. Richard Turner - Pittsford NY

Assignee:

Exxon Research & Engineering Co. - Florham Park NJ

International Classification:

C08K 500
C08L 3900

US Classification:

524555

Abstract:

A method for reducing frictional drag of water in flow through pipes comprising adding about 5 to about 100 ppm of a water soluble copolymer to said water, said copolymer having the formula: ##STR1## wherein R. sub. 1 is an alkyl or cycloalkyl group having about 6 to about 22 carbon atoms, R. sub. 2 is the same or different alkyl group as R. sub. 1 or hydrogen, x is about 90. 0 to about 99. 9 mole %, and y is about 0. 1 to about 10. 0 mole %.

US Patent:

45215804, Jun 4, 1985

Filed:

Aug 29, 1983

Appl. No.:

6/526990

Inventors:

S. Richard Turner - Rochester NY
Donald B. Siano - Fanwood NJ
Jan Bock - Bridgewater NJ

Assignee:

Exxon Research & Engineering Co. - Florham Park NJ

International Classification:

C08F 2056

US Classification:

5263072

Abstract:

The copolymerization of water soluble monomers with water insoluble monomers can be effected by dissolving the water insoluble monomer into a homogeneous mixture of oil, surfactant, and cosurfactant and then diluting this with water containing the water soluble monomer to yield a predominently aqueous, homogeneous, transparent dispersion of microemulsion droplets. The polymerization is initiated with water soluble free radical initiators to give copolymers that are free of visible particulates and such that the reaction product remains homogenous. The components are chosen to yield copolymers that are water soluble and which viscosify at low concentrations.

US Patent:

46123326, Sep 16, 1986

Filed:

Dec 12, 1985

Appl. No.:

6/808035

Inventors:

Jan Bock - Bridgewater NJ
Hartley H. Downs - Annandale NJ
Donald B. Siano - Lebanon NJ
Salvatore J. Pace - Glen Gardner NJ

Assignee:

Exxon Research and Engineering Co. - Florham Park NJ

International Classification:

C08J 930

US Classification:

521 65

Abstract:

Surfactant-free stable aqueous foams may be produced by water soluble copolymers of acrylamide and N-alkylacrylamide with chain lengths greater than or equal to 6 carbons. Additionally, these polymers may contain an anionic monomer, such as a monovalent salt of acrylic acid. These copolymers and terpolymers are added to water or brine at a concentration of 0. 005 to 2 parts per 100 of solvent. When the resulting solutions are subjected to intensive mixing with the addition of air or other gases, such as nitrogen or carbon dioxide, high quality, persistent foams are formed. These foams are formed at relatively low polymer concentrations without added surfactants. They have good high temperature stability and excellent salt tolerance.