Kelly Bushing Drilling

The Kelly bushing for drilling is a critical adapter that connects the rotary table to the kelly. Moreover, it features a square or hexagonal profile that matches the kelly. Four steel pins or rollers secure it firmly to the master bushing. As the rotary table turns, rotary motion transfers through the pins and flat surfaces to the kelly, effectively driving the drill string while allowing vertical movement. This ensures smooth, controlled drilling and reduces wear on components.

Design Variants of Kelly Bushings

Kelly bushings are available in different drive designs. The Pin Drive type uses heavy-duty steel pins that fit into holes in the rotary table, ensuring a secure and stable connection. The Square Drive type relies on flat mating surfaces, providing direct torque transfer to the kelly without slippage.

Roller-Equipped Kelly Bushing

Some Kelly bushings are designed with four integrated rollers. These rollers minimize friction between the kelly and the bushing, reducing wear and extending the service life of both components.

Purpose and Functionality of Kelly Bushings

The primary function of a Kelly bushing is to act as a reliable adapter between the rotary table and the drill string. It transfers rotary motion from the table to the kelly while allowing vertical movement, ensuring smooth and efficient drilling operations.

Talk to Blue Horizon Drilling Today

Blue Horizon Drilling provides Kelly Bushings from reputable Chinese, UK, and USA brands, giving drilling operators worldwide access to dependable and field-tested solutions. Contact us for expert guidance and quotations.

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