NNJ series non tooth mark hydraulic pipe screwing machine is a loading and unloading machine for threaded connections, which adopts a high reliability design and is resistant to harsh on-site conditions. It is suitable for the screwing of couplings in oil and casing factories, as well as the manufacturing, assembly, repair, and disassembly of downhole pumps, downhole tools, tubing, casing, and other threaded connections in oil fields.

It has the following characteristics:

Fully hydraulic drive, simple and convenient operation; Accurate control torque and calibration torque;

The dental plate is made of special non-metallic plastic material, and there is no visible tooth mark at the clamping position;

Increase the contact area between the tooth plate and the oil sleeve or coupling, effectively reducing the deformation of the clamped part, without additional increase in makeup torque, and without slipping or peeling.

When making up and breaking out, the backup tong floats with the main tong, avoiding adverse effects on the screw thread caused by the misalignment of the main and backup tongs.

Zero spacing between the main and backup jaw plates, especially suitable for the maintenance and assembly of short joint products;

It is equipped with an automatic torque control system to achieve operation automation, and has functions such as torque value setting, automatic control, automatic judgment, automatic inflection point judgment, storage, and printing.

Support for private customization: non-standard pipe diameter and unconventional torque, fully automatic operation.