API7-1 Drill Collars/Non-Magnetic Drill Collar Spiral Drill Collar Nmdc

• After-sales Service: 24/7
• Warranty: 1years
• Manufacturing Process: CNC Milling
• Shipping Cost: Estimated freight per unit.: about shipping cost and estimated delivery time.
• Currency: US$
• Return&refunds: You can apply for a refund up to 30 days after receipt of the products.
• Model NO.: X 2 13/16"
• Surface Treatment: Spray-Paint
• Operation Pressure: Atmospheric Pressure
• Material: Alloy
• Name: Drill Collar
• Size: 79.4mm-279.4mm
• Transport Package: Export Packing
• Specification: 79.4mm -279.4mm
• Trademark: GPE
• Origin: China
• HS Code: 8471
• Production Capacity: 150000
• Package Size: 250.00cm * 80.00cm * 80.00cm
• Package Gross Weight: 1150.000kg

Product Description

Slick drill collar

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Drill Collar is the basic component in the BHA which provides weight on the bit for drilling and keeps the drillsting in tension. GM 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;   Pressed steel thread protectors are supplied for all drill collar that are equipped with standard connections ad protectors are supplied for all drill collar that are equipped with standard connections



 

 

Description:

1. Material: 4145H/4145Hmod or Non-magnetic.

2. Standard: API7-1, NS-1.

 

A. Slick Drill Collar

Note: Drill collar is mainly used to provide bit weight to drill bit so that drill pipe is in tension. Especially drill collar can keep drill bit centralized and hole track by large rigidity. The Drill collar are manufactured strictly from API Spec7-1 and SY5411 standard.

 

B. Spiral Drill Collar

Note: Spiral drill collar is used to reduce contact area with hole so as to avoid efficiently bit sticking from diffirential pressure. The drill collars are manufactired strictly according to API Spec7-1 and Standard SY5144.

 

C. Spiral Drill Collar With Elevator Groove And Slip Groove

Note: Elevator groove and slip groove made on box thread face of slick drill collar or spiral drill collar can be used as lifting sub and safety slip when trip out. The technical parameters for elevator groove and slip groove is as per API SPEC7-1. Hardbanding is optional at customers' requests.

 

D. Non-magnetic Drill Collar

The as cold rooled finish on both ID and OD surface with unique technical process strengthen the structure and ensures the tools with optimal resistance to stress,corrosion,cracking and the mechanical performance is greatly enganced.