API 7-1 Heavy Weight Drill Pipe HWDP - 3.5" to 6.625" OD with 758 MPa Yield Strength
Price:
USD500-10000/pc
MOQ:
1 pc
Delivery Time:
30 work days
Product Description
API 7-1 Heavy Weight Drill Pipe (HWDP)
Product Overview
Integral spiral heavy weight drill pipe manufactured according to SY/T 5146-1997 standard using AISI 4142H-4145H modified drill collar material. Designed to provide gradual transition between heavy drill collars and standard drill pipe, reducing stress concentration and improving drilling efficiency.
Key Features & Benefits
- Prevents stress concentration at top of drill collars
- Enables higher RPM drilling operations
- Reduces torque and differential pressure sticking
- Ideal for directional drilling applications
- Minimizes connection fatigue in high-angle or horizontal drilling
- Reduces pipe failures and extends drill stem service life
Technical Specifications
| Size | Outer Diameter | Inside Diameter | Joint OD | Joint ID | Thread Type |
|---|---|---|---|---|---|
| 3 1/2" | 3 1/2" | 2 1/4" / 2 1/16" | 4 3/4" - 5" | 2 1/4" / 2 1/16" | NC38 |
| 4" | 4" | 2 1/2" / 2 9/16" | 5 1/4" | 2 1/2" / 2 9/16" | NC40 |
| 4 1/2" | 4 1/2" | 2 11/16" - 2 13/16" | 6 1/4" | 2 11/16" - 2 13/16" | NC46 |
| 5" | 5" | 3" | 6 5/8" | 3" | NC50 |
| 5 1/2" | 5 1/2" | 3 1/4" - 4" | 7" - 7 1/2" | 3 1/4" - 4" | 5 1/2 FH |
| 6 5/8" | 6 5/8" | 4" - 5" | 8" - 8 1/2" | 4" - 5" | 6 5/8 FH |
Material Properties
| Yield Strength | Tensile Strength | Elongation | Hardness (HB) | Charpy Impact |
|---|---|---|---|---|
| ≥758 MPa (110,000 PSI) | ≥965 MPa (140,000 PSI) | ≥13% | 285-341 | ≥54 J |
Contact Information
Dongying OilMan Machinery Equipment Co.
Address: North Two Road, Dongying City, Shandong Province, China
Mobile/WhatsApp/WeChat: +86 13475294399
Email: christal@oilmancn.com
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Company
Dongying Oilman Machinery Equipment Co.,Ltd.
Location
www.oilmanchina.com
Contact Person
Christal