Walkover Locating System Manufacturers & Dealers

Digital Control, Inc. 25 SW 41st St. Renton, WA 98055 TEL 800-288-3610 FAX 425-251-0702 www.digital-control.com		McLaughlin Manufacturing Co. 2006 Perimeter Road Greenville, SC 29605 TEL 800-435-9340 FAX 803-235-9661 www.mightymole.com	Radiodetection 35 Whitney Road Mahwah, NJ 07430 TEL 800-524-1739 FAX 201-848-1303 www.radiodetection.com
Source: HDD 3505 W. 30th South Wichita, Kansas 67217 TEL 888-311-3869 TEL 316-944-0081 FAX 316-220-9064 www.sourcehdd.com		Subsite Electronics 1950 West Fir Perry, OK 73077 TEL 800-846-2713 FAX 405-336-5495 www.subsite.com

Downhole Guidance System Manufacturers

Northstar Drilling Tech., Inc. 1724-A Townhurst Drive Houston, TX 77043 TEL 713-827-8287 FAX 713-827-8709 www.northstardrilling.com

Tensor (G.E./Honeywell) PO Box 14843 Austin, TX 78761 1840 Royston Lane Round Rock, TX 78664 TEL 512-251-4131 FAX 512-251-7396 FAX 512-251-5798 www.tensorproducts.com

Scientific Drilling 1100 Rankin Road Houston, TX 77047 TEL 281-443-3300 FAX 281-443-3311 www.scientificdrilling.com

Downhole Guidance System Suppliers & Service Providers

Boregyde, Inc. 725-A Lakefield Road Westlake Village, CA 91361 TEL 818-707-2250 FAX 805-495-1889 www.boregyde.com		Centerline Directional Guidance Systems, Inc. 5426 Grape Houston, TX 77096 TEL 713-432-0417 FAX 713-432-0348		Digital Control, Inc. 425 SW 41st Renton, WA 98055 TEL 425-251-0701 FAX 425-251-0702 www.digital-control.com
Guided Boring Systems 2916 West T. C. Jester Houston, TX 77018 TEL 713-683-8961 FAX 713-683-6418		Horizontal Technologies 8811 Emmott, Suite 700 Houston, TX 77040 TEL 713-774-5594 FAX 713-466-7552		Inrock Guidance Systems, Inc. 12707 N. Freeway, Suite 148 Houston, TX 77060 TEL 281-872-4893 FAX 281-872-4898 www.inrock.com
Northstar Drilling Tech., Inc. 1724-A Townhurst Drive Houston, TX 77043 TEL 713-827-8287 FAX 713-827-8709 www.northstardrilling.com		Scientific Drilling 1100 Rankin Road Houston, TX 77047 TEL 281-443-3300 FAX 281-443-3311 www.scientificdrilling.com		Sharewell, Inc. 10543 Fisher Rd. Houston, TX 77041 TEL 713-983-9818 FAX 713-983-9820 www.sharewell.com
Slimdril International, Inc. 5130 Franz Road, Suite 800 Katy, Texas 77493 TEL 281-391-5800 FAX 281-391-7595 www.slimdril.com Jim Cloud (jcsdius@aol.com) Rollin Boyd (rbsdius@aol.com)		Slimdril International, Inc. Unit 4, Marine Park Gapton Hall Road Great Yarmouth Norfolk, NR31 0NL TEL (44) (1) 493-656145 FAX (44) (1) 493-601722 www.slimdril.co.uk Richard Johnson (sdi@slimdril.co.uk)		Source: HDD 3505 W. 30th South Wichita, Kansas 67217 TEL 888-311-3869 TEL 316-944-0081 FAX 316-220-9064 www.sourcehdd.com
Weatherford Radius 1344 Almeda School Road Houston, TX 77047 TEL 713-433-2500 FAX 713-433-2566 www.weatherford.com		Wellbore Navigation 15032 Red Hill Ave. #D Tustin, CA 92780-6519 TEL 714-259-7760 FAX 714-259-9257

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