University of Oklahoma(1989) * OU Medical Center (1991) *Neurological Surgery Univ Ok Hlth Sci Ctr, Neurological Surgery (1991) *Neurological Surgery
Name / Title
Company / Classification
Phones & Addresses
Mr. David Donnell Owner
Anvil Enterprizes Truck Dealers
6090 Highway 15, Winnsboro, LA 71295 (318)4120096
David Donnell Owner
Anvil Enterprizes Truck Dealers
6090 Hwy 15, Winnsboro, LA 71295 (318)4120096
David N. Donnell Director
Pwa Coalition of Dallas, Inc
David Donnell
DAVID DONNELL PROPERTIES, LLC
6090 Hwy 15, Winnsboro, LA 71295 PO Box 778, Winnsboro, LA 71295
David Donnell
GREASER, LLC
2544 Hwy 130, Winnsboro, LA 71295 C/O David Donnell, Winnsboro, LA 71295
David M. Donnell
DELTA PIPE PUSHERS, INC
Rt 5, Winnsboro, LA 71295
David Donnell Director, President
DONNELL, INC Whol Scrap/Waste Material
6090 Hwy 15, Winnsboro, LA 71295 C/O David Donnell, Winnsboro, LA 71295 PO Box 778, Liddieville, LA 71295 2544 Hwy 130, Liddieville, LA 71295 (318)4353404
David Donnell Principal
Donnell David Nonclassifiable Establishments
PO Box 778, Liddieville, LA 71295
Us Patents
Apparatus For Driving An Elongate Member Through The Ground
David A. Donnell - Winnsboro LA Robert F. Holden - Longview TX
International Classification:
E21B 1900
US Classification:
254 29R
Abstract:
An improved method and apparatus is disclosed for advancing a rod or pipe through the ground using a compressive force. The invention includes the use of a displaceable tray supported within a frame assembly for carrying a rod or pipe segment. A driving mechanism is included which is supported within the assembly and parallel and adjacent the rod or pipe segment to be driven. Using a removeable end plate insertable within the tray, the rod or pipe segment may be sequentially advanced in a stepwise fashion with a minimal size driving mechanism and frame assembly. Using a jaw assembly mounted on an end of the tray, the rod may be sequentially withdrawn in a stepwise fashion also.