DAVID W FORD
Electrician at Tanglewood Ln, Frisco, TX
License number
Texas 84232
Expiration Date
Feb 6, 2018
Category
Master Electrician
Address
Address
4205 Tanglewood Ln, Frisco, TX 75035
Phone
(469) 247-6863
Professional information
Active Counterbalance For A Power Swivel During Well Drilling
US Patent:
4813498, Mar 21, 1989
Filed:
Mar 3, 1988
Appl. No.:
7/163580
Inventors:
James E. Lynch - Dallas TX
David B. Ford - Frisco TX
David B. Ford - Frisco TX
Assignee:
National-Oilwell - Houston TX
International Classification:
E21B 1906
US Classification:
175113
Abstract:
An active counterbalance for suspending a power swivel from a traveling block. The power swivel includes a motor drive assembly for rotating a drill string and a handling system for supporting a drill pipe. The counterbalance includes a motor which provides means for biasing the load capacity of the counterbalance when supporting the power swivel to allow vertical displacement of the power swivel relative to the traveling block. The counterbalance prevents damage to connecting or sealing surfaces when adding pipe to or removing pipe from the drill string because most of the weight of the power swivel and pipe suspending from the handling system is transferred to the counterbalance.
Spring Actuated Power Swivel Support Rollers
US Patent:
4877093, Oct 31, 1989
Filed:
Mar 3, 1988
Appl. No.:
7/163583
Inventors:
David B. Ford - Frisco TX
James E. Lynch - Dallas TX
Leroy R. Rateike - Rockford IL
James E. Lynch - Dallas TX
Leroy R. Rateike - Rockford IL
Assignee:
National-Oilwell - Houston TX
International Classification:
E21B 302
US Classification:
175113
Abstract:
A spring actuated guide system for a top driven drilling machine. Rollers for guiding the drilling machine are mounted onto springs which urge the rollers into contact with support surfaces on parallel tracks within a derrick. If the tracks become misaligned, the springs allow for the misalignment with low roller loads thereby providing limited rotational movement of the drilling machine relative to the tracks. Premature failure of the roller bearings is prevented and wear on the rollers and tracks is reduced.