6-3/4" API 7-1 Spec AISI 4145H Spiral Drill Collar for Oil Well Drilling - 9140mm/9450mm Length Options
Price:
USD500-10000/pc
MOQ:
1 pc
Delivery Time:
30 work days
Product Description
API 7-1 Spec 6-3/4" AISI 4145H Spiral DC Drill Collar
Drill collars are heavy-duty integral tools designed to concentrate weight onto the drill bit, generating sufficient force for efficient rock breaking during oil well drilling operations. Manufactured from high-strength AISI 4145H or 4145H modified steel, these components connect between drill pipes and drill bits.
Product Features & Specifications
- Complies with API Spec 7-1 dimensional requirements
- Available with slip and elevator recesses for safe handling
- Manufactured from AISI 4145H or 4145H modified steel
- Standard lengths of 9140mm and 9450mm
- Customization available per customer specifications
Drill Collar Types
Slick Drill Collar: Provides bit weight to maintain drill pipe tension and centralizes drill bit positioning through superior rigidity.
Spiral Drill Collar: Reduces contact area with borehole walls to prevent differential pressure sticking.
Spiral Drill Collar with Elevator & Slip Grooves: Features lifting and safety slip functionality on box thread face, with optional hardbanding available.
Non-magnetic Drill Collar: Cold-rolled finish on ID and OD surfaces enhances structural strength and resistance to stress, corrosion, and cracking.
Technical Specifications
| Size (in) | O.D (mm) | I.D. (mm) | Code | Thread | Length (mm) | Weight (kg) |
|---|---|---|---|---|---|---|
| 6 3/4 | 171.4 | 57.2(2-1/4) | NC46-67 | NC46 | 9140/9450 | 1471/1521 |
| 7 | 177.8 | 57.2(2-1/4) | NC50-70 | NC50 | 9140/9450 | 1597/1651 |
| 8 | 203.2 | 71.4(2-13/16) | NC56-80 | NC56/6-5/8REG | 9140/9450 | 2040/2109 |
| 9 | 228.6 | 71.4(2-13/16) | NC61-90 | NC61 | 9140/9450 | 2658/2748 |
| 11 | 279.4 | 76.2(3) | 8-5/8REG | 8-5/8REG | 9140/9450 | 4072/4210 |
Note: Complete size range available. Drill collars can be customized according to customer design requirements.
Contact Information
Dongying OilMan Machinery Equipment Co.
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