Non-Mag Drill Collar Spiral Drill Collar

Product Details
Customization: Available
After-sales Service: 24/7
Warranty: 12 Months
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  • Non-Mag Drill Collar Spiral Drill Collar
  • Non-Mag Drill Collar Spiral Drill Collar
  • Non-Mag Drill Collar Spiral Drill Collar
  • Non-Mag Drill Collar Spiral Drill Collar
  • Non-Mag Drill Collar Spiral Drill Collar
  • Non-Mag Drill Collar Spiral Drill Collar
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  • Overview
  • Product Description
  • Detailed Photos
  • Product Parameters
Overview

Basic Info.

Model NO.
BBDC
Surface Treatment
Spray-Paint
Operation Pressure
Atmospheric Pressure
Material
Alloy Steel
Name
Heavy Weight Drill Pipe
Diameter
3 1/2" 4" 4 1/2" 5" 5 1/2" 6 5/8"
Usage
Well Drilling
Transport Package
by Container or Bulk Vessel
Specification
As per sizes
Trademark
BOBAN & OEM
Origin
China
HS Code
8431431000
Production Capacity
1000 PCS Per Month

Product Description

Oilfield Drill Collar Spiral Drill Collar
Product Description

Boban series drill collar is used between the drill pipe and the bit in the drill stem. It is used to put weight on the bit so that the bit can drill.

Materials
Drill collars are manufactured from AISI 4145H modified steel, and are supplied in the "as rolled" surface finish condition. Alternative surface finishes are available.

Trepanning and Heat Treatment:
Drill collars are trepanned and drifted to API Spec 7-1. Full-length heat-treatment processes ensure that mechanical properties meet or exceed API Spec 7-1 requirements. A hardness range of 285-341, Brinell hardness and Charpy "V" notch minimum impact strength of 40 ft-lb at 70 F are guaranteed one inch below the surface.

Traceability
Drill collar material and process traceability are maintained from receipt of the mill's certified raw material to completion of manufacturing. Serial numbers are die stamped on bar bodies.
Rigid Inspection Procedures:
We inspect all our drill collars to ensure compliance with API SPEC 7-1 standards. These inspections include visual dimensional checks as well as ultrasonic inspections over the entire body of the drill collar.

Rolling
Drill collar thread roots, as well as elevator recess upper radius, are cold-rolled. Cold rolling creates a compressive recess upper radius stress condition that increases fatigue life by minimizing crack initiation.

Phosphate-coated or Copper Plating
All connections are phosphate-coated or copper plated to improve resistance to corrosion.

Slip Groove, Elevator Groove and Size
Huanjie offers optional slip and elevator recesses to improve handling efficiency and safety. Unless otherwise specified, slip and elevator recesses are machined in compliance with API spec 7-1 guidelines.

Thread Protectors:
Our company offers steel, cast steel and plastic steel thread protectors for its drill stem products.

We supply
 slick drill collars, spiral drill collars and non-magnetic drill collars; sizes are from 3-1/8 to 11 inches. Besides the drill collars in the table below, we can supply other drill collars at customers' request.

Detailed Photos

Non-Mag Drill Collar Spiral Drill CollarNon-Mag Drill Collar Spiral Drill Collar

Product Parameters
 
Nominal size D d L DF Bending Strength ratio
  mm in mm in mm mm  
NC31-41(2-7/8IF) 104.8 4-1/8 50.8 2 9150 100.4 2.43:1
NC35-47 120.7 4-3/4 50.8 2 9150 114.7 2.58:1
NC38-50(3-1/2IF) 127.0 5 57.2 2-1/4 9150 121.0 2.38:1
NC44-60 152.4 6 57.2 2-1/4 9150/9450 144.5 2.49:1
NC44-60 152.4 6 71.4 2-13/16 9150/9450 144.5 2.84:1
NC44-62 158.8 6-1/4 57.2 2-1/4 9150/9450 149.2 2.91:1
NC46-62(4IF) 158.8 6-1/4 71.4 2-13/16 9150/9450 150.0 2.63:1
NC46-65(4IF) 165.1 6-1/2 57.2 2-1/4 9150/9450 154.8 2.76:1
NC46-65(4IF) 165.1 6-1/2 71.4 2-13/16 9150/9450 154.8 3.05:1
NC46-67(4IF) 171.4 6-3/4 57.2 2-1/4 9150/9450 159.5 3.18:1
NC50-67(4-1/2IF) 171.4 6-3/4 71.4 2-13/16 9150/9450 159.5 2.37:1
NC50-70(4-1/2IF) 177.8 7 57.2 2-1/4 9150/9450 164.7 2.54:1
NC50-70(4-1/2IF) 177.8 7 71.4 2-13/16 9150/9450 164.7 2.73:1
NC50-72(4-1/2IF) 184.2 7-1/4 71.4 2-13/16 9150/9450 169.5 3.12:1
NC56-77 196.8 7-3/4 71.4 2-13/16 9150/9450 185.3 2.70:1
NC56-80 203.2 8 71.4 2-13/16 9150/9450 190.1 3.02:1
6-5/8REG 209.6 8-1/4 71.4 2-13/16 9150/9450 195.7 2.93:1
NC61-90 228.6 9 71.4 2-13/16 9150/9450 212.7 3.17:1
7-5/8REG 241.3 9-1/2 76.2 3 9150/9450 223.8 2.81:1
NC70-97 247.6 9-3/4 76.2 3 9150/9450 232.6 2.57:1
NC70-100 254.0 10 76.2 3 9150/9450 237.3 2.81:1
 

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