Drill Collar is the basic component in the BHA which provides weight on the bit for drilling and keeps the drillsting in tension.
Drill Collar has been approved by the NS-1 certification, it is manufactured from 4145H modified quenched and tempered steel, strict metallurgical specifications are followed to insure that full length heat treating produces a consistent maximum depth of hardness.
Features and Benefits
A hardness range of 285 to 341 BHN and a Charpy impact value of 40 ft-lbs are guaranteed at evenly distributed 16 points in any sections at room temperature;
Connections are completed(phosphate coated)to protect them from the elements after machining and to help prevent galling upon initial make-up;
Thread roots are cold rolled on API and H-90 connections;
Drill collar OD and ID;
Special features desired, for example:
Slick or Spiral;
Stress Relief Features;
Slip and/or Elevator Recess;
GE PETROLEUM EQUIPMENT (BEIJING) CO., LTD. (“GEPEC”) is a large and global assembly supplier specialized in petro-drilling equipment，automotive tyre, industry valves and hydraulic tools, and supply high-quality products and excellent services for the clients, and also makes system solution in order to increase clients’ working efficiency.
At present, “GEPEC” has four divisions: Petroleum Drilling Equipment Division, Automotive Tyre Division, and Hydraulics Tools Division & Industry Valve Division
GEPEC’ solution has been well qualified by relevant quality management system (API / ISO / HSE & others) since its establishment. So far, the petroleum drilling equipment and other products supplied by GEPEC have exported to the majority of the drilling companies all over the world including Middle Asia, Africa, Southeast Asia, South & North Americas, Middle East and North Europe Etc.
GEPEC warmly welcomes business partners around the world to develop and strength business cooperation in various fields, adhering to its business principle of “clients first, quality first and reputation first”. GEPEC commits to offer the best products & services to customers to the clients and to make more contribution to the economic development of the world