Profile: Woolslayer Companies, Inc. designs and fabricates oil & gas drilling equipment. Our products include masts, derricks, substructures, top drive track systems, wireline sheaves, hydraulic cylinders and hydraulic power units. We also produce coke drum towers, communication towers, electrical transmission towers, roller cam rig movers, traveling blocks, crown blocks, off-highway trailers, trailer suspensions and wheels. Our service line includes computer aided design, structural monitoring, field surveys and on-site fabrication inspection. Our sheaves are fabricated from rolled steel plate and forged steel hubs. Our hydraulic cylinders are used by skidding offshore rigs, land rig movers, hydraulic-raised folding masts, power steering for rig movers, BOP handling systems, leveling devices for derricks & masts and pin removers.