Terex Corporation

Oswaldo M Pires

A method and apparatus for carousel drilling, which includes a drill tower having a rotatable drive motor at the top, and a carousel pivotably attached with respect to the drill tower and capable of supporting four elongated drilling devices, at least certain of which are drill extenders capable of attachment to, and detachment from, a drilling tool. A retainer plate is located at the upper end portion of the carousel to receive and retain the drilling devices in a generally vertical orientation when the drill tower and the carousel are raised to a generally vertical orientation for operative drilling. A primary breaker plate is provided for individually receiving and engaging each drilling device at the lower end portion of the carousel. A secondary breaker plate is located above the primary breaker plate for individually receiving the four drilling devices.

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McKinney, TX, United States of America

Oswaldo M Pires