Rotary Table Bushings and Adapter Bowls
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Master Bushings
The primary bushing that seats in the rotary table bore, transmits torque to the drill string, and supports slips and the kelly bushing. Common styles include solid (one-piece), split, and hinged designs.
Square-Drive (Pin-Drive) and Square Master Bushings
Master bushings classified by how torque is transmitted from the rotary table, either through square drive lugs or through drive pins. Selection matches the rotary table's drive configuration.
Kelly Bushings
Bushings that engage the kelly's flat sides and seat into the master bushing, transferring rotation from the table to the kelly. Available in pin-drive and square-drive styles to match the master bushing.
Roller Kelly Bushings
Kelly bushings fitted with rollers that contact the kelly faces, reducing friction and wear as the kelly moves vertically through the bushing during drilling.
Insert Bowls and Adapter Bowls
Tapered bowls that fit inside the master bushing to receive slips for a specific pipe, tubing, or casing size, adapting one master bushing to a range of string diameters.
Casing Bushings
Bushings and bowls sized to support and hold casing in the rotary table while running casing strings, accommodating larger outside diameters than drill-pipe slips.
Bit Breakers and Wear Bushings
Inserts placed in the rotary table opening to hold the drill bit for make-up and break-out, or to protect the table bore from wear during operations.
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