Patent ID: 6065372
Filing Date: 2000-05-23
Classification: E21B

Abstract:
A spinning tool for assembling threaded pipe lengths together, the tool comprising:a base;a motor connected to the base;a drive system connected to the base and comprising:a double drive sprocket operationally connected to the motor and having an axle and comprising coaxial upper drive sprocket and lower drive sprocket;a first roller located a distance from the upper drive sprocket and having an axle parallel to the double drive sprocket axle and having a first roller sprocket;an upper chain drive operatively seated with and connecting the upper drive sprocket and the first roller sprocket;a second roller located a distance from the lower drive sprocket and having an axle parallel to the double drive sprocket axle and having a second roller sprocket; anda lower chain drive operatively seated with and connecting the lower drive sprocket and the second roller sprocket;wherein the first roller and upper chain lie in a first line intersecting the double drive sprocket axle, and the second roller and lower chain lie in a second line intersecting the double drive sprocket axle, so that said first line is at an angle to said second line to make the drive system generally a v-shape; andan engagement system for clamping the pipe length against the first and second rollers, the clamping system comprising:a pivot arm connected to and extending from the base to be spaced from the drive system and generally parallel to a line extending between the first roller and the second roller, so that the tool has a space between the pivot arm and the drive system for receiving a pipe length;an idler roller rotatably connected to the pivot arm and extending toward the drive system for contacting a pipe length received in the tool parallel to the axles of the first and second rollers;and an actuator for moving the pivot arm to place the idler roller against the pipe length;wherein the pivot arm and actuator are adapted to clamp the pipe length against the first and second rollers, so that the rollers rotate the pipe length on its axis.