Saudi Arabian Oil Company

Mohammed Badran

Md Amanullah

Timothy Eric Moellendick

Raed A Alouhali

A drill pipe assembly has an inner tubular member with a Trojan central bore. An outer tubular member circumscribes the inner tubular member. An annular storage space is defined between the outer tubular member and the inner tubular member. An uphole connection member connects to an uphole drill string so that the Trojan central bore is in communication with the uphole drill string. A downhole connection member connects to a downhole drill string so that the Trojan central bore is in communication with the downhole drill string. A window assembly is moveable between a closed position and an open position. In the open position the window assembly provides a flow path between the annular storage space and an outside of the outer tubular member. In the closed position the window assembly prevents a flow between the annular storage space and the outside of the outer tubular member.

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Dhahran, Saudi Arabia

Mohammed Badran