Patent ID: 8667869

Claim:
A spinner assembly for threading or unthreading substantially vertical oilfield tubular members above a floor at a well site, comprising: a spinner housing having an open throat for receiving a tubular member therein, said spinner housing having a common axis; a plurality of rollers rotatable about a substantially vertical axis and adapted to engage said tubular member positioned within said throat; a plurality of motors for rotating the rollers; a plurality of driving shafts, each driving shaft being connected to one of said plurality of motors and having an elongated portion of polygonal shape in cross section, a pair of substantially coaxial, opposing brackets supporting the rollers and motors and disposed within said spinner housing on opposite sides of said throat, said brackets being movable within said spinner housing in a direction towards and away from said throat, wherein said brackets and rollers move in and out of the spinner housing in opposite directions in a substantially straight line along said common axis; a pair of actuators disposed within said spinner housing on opposite sides of said throat, each actuator including a first end connected to said spinner housing and a second end attached to one of said brackets for moving said brackets and rollers along said common axis; each of said plurality of rotatable rollers having a central polygonal passageway for directly mating with one of said driving shafts; each roller having two or more axially spaced cylindrical portions, a lower surface of an upper cylindrical portion spaced above an upper surface of a lower cylindrical portion; each cylindrical portion having a plurality of arcuate members each having a partially cylindrical exterior surface and end surfaces spaced adjacent ends of a respective exterior surface, each end surface of each arcuate member being in planar engagement with an end surface of an adjoining arcuate member, and the end surfaces of the upper cylindrical portion being circumferentially offset from the end surfaces of the adjoining lower cylindrical portion; and each roller having a plurality of fasteners each extending between and interconnecting the two or more axially spaced cylindrical portions, wherein each arcuate member can be removed from the spinner assembly by removing only a plurality of fasteners, without removing any other component except the roller's each arcuate member itself.