Design, manufacture and test standard
API Spec 16A (3th) (16A-0100): specification for drill-through equipment
API spec 6A (20th) (6A-0474): Specification for wellhead & X-tree Equipment
NACE MR0175-2003/ISO 15156: Petroleum and natural gas materials in H2S environments
Top and Bottom sheaves are used matching with the guide rope device which can regulate the wireline trip.
The foreign customs are used to taking the top sheave as a part of the stuffing box. We suggest that the clients had better purchase the Top and Bottom sheaves together.
The most commonly used is 16 "pulley.
Our company can design and manufacture according to the actual requirements of customers.