1
Brown Cicero C: Electric power swivel and system for use in rotary well drilling. October 23, 1973: US3766991 (110 worldwide citation)

An electric power swivel for rotating and handling drill pipe during well drilling, adapted for use with either conventional drill pipe or larger diameter casing strings and having fluid pressure cushioned suspension means to accommodate vertical movements required in making up and breaking out thre ...


2
Brown Cicero C: Rotary drive connection for casing drilling string. July 24, 1973: US3747675 (107 worldwide citation)

A drive connection for connecting a rotary power source to a string of well casing employed as a rotary drilling string. The drive connection is designed to be insertible in the upper end of the casing and is provided with a mandrel carrying slips and a slip expander for gripping the interior of the ...


3
Brown Cicero C: Rotating drive assembly. December 4, 1973: US3776320 (107 worldwide citation)

A rotating drive assembly which may be supported on a vertically movable traveling block suspended in a well derrick. The drive assembly may comprise an elevator assembly adapted for non-threaded engagement with a tubular member, for handling and transmitting torque thereto, and a power source conne ...


4
Brown Cicero C: Apparatus for rotary drilling of wells using casing as drill pipe. January 5, 1971: US3552509 (90 worldwide citation)

A drilling system employing casing as drill pipe and a bit section which is bodily insertable and removable through the casing and releasably attachable thereto for rotation with the casing.


5
Brown Cicero C: Pipe handling system for use in well drilling. December 19, 1972: US3706347 (87 worldwide citation)

A pipe handling system for use in well drilling. The system includes pipe storage racks, power-operated conveyor means for advancing the pipe sections to a drilling derrick and for transferring the pipe sections from the storage racks to the conveyor means; power swivel means supported by the derric ...


6
Brown Cicero C: Pipe handling system for use in well drilling. December 25, 1973: US3780883 (81 worldwide citation)

A pipe handling system for use in well drilling. The system includes pipe storage racks, power-operated conveyor means for advancing the pipe sections to a drilling derrick and for transferring the pipe sections from the storage racks to the conveyor means; power swivel means supported by the derric ...


7
Brown Cicero C: Apparatus for rotary drilling of wells using casing as the drill pipe. January 5, 1971: US3552508 (76 worldwide citation)

A drilling system employing casing as drill pipe and a bit section which is bodily insertable and removable through the casing and releasably attachable thereto for rotation with the casing.


8
Brown Cicero C: Apparatus for rotary drilling of wells using casing as the drill pipe. January 5, 1971: US3552510 (74 worldwide citation)

A drilling system employing casing as drill pipe and a bit section which is bodily insertable and removable through the casing and releasably attachable thereto for rotation with the casing.


9
Brown Cicero C: System for rotary drilling of wells using casing as the drill string. January 5, 1971: US3552507 (72 worldwide citation)

A rotary well drilling system employing well casing as the drill string; a bit assembly having radially expansible cutters bodily insertable and removable through the bore of the casing and releasably connected thereto; and a drive connection means releasably insertable into the upper end of the cas ...


10
Brown Cicero C: Apparatus for rotary drilling of wells using casing as the drill pipe. April 18, 1972: US3656564 (70 worldwide citation)

A drilling system employing casing as drill pipe and a bit assembly which is bodily insertible and removable through the casing and releasably attachable thereto for rotation with the casing.