Specifications Dd drill pipe elevators: 1. Api 8c spec 2. Prompt delivery 3. Handling 90 shoulder drill pipe, casing, tubing and drill collar Dd center latch elevators The dd type elevators are hoisting tools for handling 90â°shoulder drill pipe, casing, tubing and drill collar in oil and gas field.The elevators are designed and manufactured according to api spec 8c-specification for drilling and production hoisting equipment. Technical specification: Main technical parameters: Model Size (in) Rated capacity (short tons) Drill pipe Casing Tubing Dd-100 2.3/8-5.1/2 4.1/2-5.1/2 2.3/8-4.1/2 150 Dd-250 2.3/8-5.1/2 4.1/2-5.1/2 2.3/8-4.1/2 250 Dd-350 2.3/8-5.1/2 4.1/2-5.1/2 2.3/8-4.1/2 350