Spiral Drill Collar

Product Description

We are a wellknown trademark enterprise, estabilished in ***3. It has been certified to ISO, API, and HSE management system. Clients include Weatherford, Schlumberger, Halliburton, Bowen, Smith, National Oilwell Varco,Boredrill, and etc.

Strict metallurgical tests are performed per specifications to ensure that the heat treatment produces consistent and maximum hardness through the depth of the bar.

A hardness range of **5 to **1 BHN and a Charpy impact value of *0 ft-lbs are guaranteed for evenly distributed *6 points in any cross sections at room temperature;

Connections are phosphate coated after machining to protect the threads from corrosive elements and to prevent galling upon initial make-up;

Thread roots are cold rolled on API and H**0 connections;

Pressed steel thread protectors are supplied for all drill collar that are equipped with standard connections