CORPORATE HEADQUARTERS
1421 S. Sheridan Road
Tulsa, Oklahoma 74112
Phone: (918) 835-3161
Toll-Free: (800) 331-4463

PENNWELL- HOUSTON
1455 West Loop South, Suite #400
Houston, Texas 77027
Phone: (713) 621-9720
Toll Free: (800) 736-6935
Fax: (713) 963-6285

PENNWELL- NASHUA
98 Spit Brook Road
Nashua, New Hampshire 03062-5737
Phone: (603) 891-0123
Toll Free: (800) 225-0556
Fax: (603) 891-9294

PENNWELL- FAIR LAWN
Vanguard Building 
21-00 Route 208 South
Fair Lawn, New Jersey 07410
Phone: (973) 251-5040
Fax: (973) 251-5065

PENNWELL- UNITED KINGDOM
The Water Tower
Gunpowder Mill
Powdermill Lane
Waltham Abbey, Essex EN9 1BN, UK
Phone: +44-199-265-6600
Fax: +44-199-265-6700

PENNWELL- RUSSIA
115114, Moscow, Russia
Derbenevskaya street, 1 bld 1
Derbenevsky Business park
entrance 21, 2 floor
PO Box 32
tel|fax +7 499 271 93 39