All elevators shall be designed and manufactured according to the requirements in API Spec 8C Specification for Drilling and Production Hoisting Equipment

(1) DD Elevators Model DD center latch elevator with square shoulder are suitable for handling drill collar, casing and

     tubing. The load ranges from 150 tons to 350 dons. The size ranges are from 2 to 51/2.

(2) DDZ Elevators DDZ series elevators are center latch elevator with 18 degree taper shoulder, applied in handling the

     drilling pipe and drilling tools, etc. The load ranges from 100 tons to 750 dons. The size ranges are from 2 to 6.

(3) CDZ elevator CDZ drilling pipe elevator is mainly used in the holding and hoisting of drilling pipe with 18 degree taper

     and tools in oil and natural gas drilling, well construction.

(4) TA elevator Model TA center latch elevator with square shoulder are suitable for handling drill pipe, drill collar, casing

     and tubing.

(5) CD elevator Model CD side door elevator with square shoulder are suitable for handling tubing, casing ,drill pipe and

     drill collar in oil and natural gas drilling, well construction.