CDD型对开式吊卡主要用于石油天然气钻、修井作业过程中油管、套管、钻杆、钻铤的卡持与提升。产品按API Spec 8C规范要求设计制造。

Model DD center latch elevators with square shoulder are suitable for handling drill collar,drill pipe,casing and tubing.The load ranges from 150 tons to 350 tons.The size ranges from 2 3/8 to 5 1/2 inch.The products are desinged and manufactured according to the requirements in API Spec 8C Specification for Drilling and Production Hoisting Equipment.