These kinds of elevator links are designed in accordance with API 8C、7K and relative technical standards and have got a production license from relative authority. These kinds of elevator links are made of good-quality forged alloy steel. The intensity and stress force of the elevator links have been verified and tested by ABAQUS finite-element analysis and of electrical trials. The elevator links have been treated with two-grade sand blast for surface finish.

These kind of elevators are designed and manufactured in accordance with API 8C, sy5035 and relative technical standards and have gotten a production license from relative authority. The main loaded parts are made of good-quality alloy steel. The intensity and stress force of the elevators have been verified and tested by ABAQUS finite-element analysis and of electrical trials. A new quenching process is used for heat-treatment of the elevator. Each finished product will be inspected before delivery and detected with non-destructive detector strictly in accordance with related standards.

The portable iron roughman with a large working scope is a novel multi-function power tong which can be used to tighten and dismantle connections. It can also replace both the DP power tong for spinning and B type tong for break-out function. The compact iron roughman can be fixed on the substructure and adjusted on the top-and-down positions and the forward --and --backward directions. The iron roughman is controlled hydraulically and its torque and speed can be adjusted swiftly in order to realize the foregoing-option maximums on the positive and negative directions. In addition, the top-buckle torques can be controlled exactly with the purpose of DP protection. A split-type structure is adopted utilized so as to avoid the bending of DP caused by large torque and the skidding of DP inside the slip. The clamping of the up-and- down tongs can be conducted via clamping cylinder and clamping block, which the clamping unit also can be automatically re-centered to make the new --and- old DP connections credibly clamped. Safety and inspection measures are strengthened under the guidance of the design concept of "Humanism Above All" to meet the requirements of HSE.