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Heavy Weight Drill Pipe (HW DP ) is an  intermediate weight drill stem component which is used in conjunction with the drill pipes and drill collars. It has smaller wall thickness than drill collar and bigger wall thickness than drill pipe. We use HWDP between drill pipe and drill collar to prevent sudden change of drill string section and reduce fatigue of drill pipe. HWDP is also a good way to Reducing torque and increase load when we need to drill much deeper. We can save a lot of time by not using lifting sub and safety clamps when we choose HWDP in the drill stem.We use HWDP in directional drilling can keep a highly drilling speed under a lower drilling torque. That reduce the wear and rupture of the drill string. Compared with the drill collar HWDP has low rigidity, and wall contact area is small, so differential pressure sticking will not happen easily.

Heavy Weight Drill Pipe
Ordering Instructions
1. Specify the specification of HWDP: Integral type or welded type, Min. OD 
2.Specify the required overall length (If non-standard)
3.Specify the required ID (If non-standard)
4. Specify the specifications of thread connection: stress relief groove, rebuild benchmark.
5.Specify type and quantity of hardbanding (standard hardbanding belt quantity should be 14 pieces. There are flush/raised type hardbanding. Other types can be designed according to customers’ requirements.) Also internal coating is an optional aspect.
6. Cold rolling for thread root or stress relief groove, or thread makeup out requirements. 
Heavy Weight Drill Pipe
Ordering Instructions
1. Specify the specification of HWDP: Integral type or welded type, Min. OD 
2.Specify the required overall length (If non-standard)
3.Specify the required ID (If non-standard)
4. Specify the specifications of thread connection: stress relief groove, rebuild benchmark.
5.Specify type and quantity of hardbanding (standard hardbanding belt quantity should be 14 pieces. There are flush/raised type hardbanding. Other types can be designed according to customers’ requirements.) Also internal coating is an optional aspect.
6. Cold rolling for thread root or stress relief groove, or thread makeup out requirements. 
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Tianhe Oil Group Huifeng Petroleum Equipment CO. ltd.