Profile: RK Pipe LLC is a supplier of new and used drill pipes, tubular products and drilling equipment. Our drilling equipments include tubular products such as drill pipe, drill collars, & heavy weight drill pipe, pipe handling equipment such as rotary tables, bushings & slips, elevators, tongs, kellys, blocks, swivels & hooks, blowout preventers, and mud pumps. Drill collars are typically furnished in various sizes and dimensions. All drill collar bores should be gauged with a drift mandrel 10ft. long. The drift mandrel should have a minimum diameter equal to the specified bore of the drill collar (standard or optional) minus 1/8 inch.