Integral Heavy Weight Drill Pipe
Specifications: 3-1/2”、4-1/2”、5”、2-7/8”和5-1/2”
Description:
Integral Heavy Weight Drill Pipe is made from 4145H alloy steel and fully heat treated, all physical properties conform to the latest API Spec7. Heavy Weight Drill Pipe is the transition section between ordinary Kelly and drill collar. It can relieve the stress concentration of the combination of drill collar and Kelly during the transition. Besides, it can provide drill pressure and reduce the linked area of drill stem and side wall, as well as wear rate of OD. There is an upset section in the middle of drill pipe. The drill pipe and joint are welded with cemented carbide hardbanding, which can efficiently keep the pipe from wearing. HWDP can replace drill collar and solve series of problems appearing in the vertical well of softer geologic structure. Its advantages are as follows:
1、Reducing torque in high-rpm or deep drilling.
2、Bring along the drill collar of stem within less time
3、Reducing the tiresome damages of tool-joint connection
4、Easy for the stem′s handling and operating
5、Helpful for keeping the direction of directional well

Our IHWDP is welded with standard hardbanding on the two ends′ joints and middle-upset section. Both pin and box end have one 4〞 hardbanding (one 1〞hardbanding can be added on 180 shoulder of the box end according to customers′ request) and the middle-upset section has one 3〞 hardbanding. The thickness of hardbanding is within 1/8〞 of the abutting surface(it can be increased if needed).