API 7-1 Drill Collar / Slick and Spiral Drill Collar

• Customization: Available
• Customized: Customized
• Surface Treatment: Painting
• Model NO.: API SPEC 7-1
• Type: Spiral Drill Collar
• Standard: API
• Usage: Oil Mining, Well Drilling
• Material: AISI4145h
• Weight (Kg): 200
• Condition: New
• Local Service Location: None
• Keyword: Kelly Drill Pipe
• Use: Well Drilling
• Dimension(L*W*H): 2000*150*150mm
• End Protector: Plastic Pipe Cap
• Certification: API
• Warranty of Core Components: 1 Year
• Surface: Painting
• Applicable Industries: Energy & Mining
• Marketing Type: Ordinary Product
• Core Components: Bearing, Gear, Pump
• Features: Safe and Stable
• Machinery Test Report: Provided
• Transport Package: Iron Shelves
• Specification: Up to the quantities
• Trademark: GOLDENMAN
• Origin: Shandong, China
• HS Code: 843143
• Production Capacity: 1000pieces/Year

Product Description

DRILL COLLAR

 

 

 

Drill Collar

-Purpose: Adds weight to the drill bit, keeping it in contact with the formation while providing stability to the drill string.

-Specifications:
  1) Size: Outer diameters of 3-1/8" to 11", with standard lengths of 31 feet.
  2) Material: Alloy steel with high yield strength.
  3) Weight: Typically heavier than drill pipe (specific gravity around 7.8).
  4) Thread Connections: API Regular or other premium threads.

-Features: 
    1) Spiral grooves for differential sticking prevention.
    2) Non-magnetic drill collars (for sensitive directional tools).

Drill collar specifications
Nominal Size	OD		ID		Length	Bevel Dia. mm	Bending Strength Ratio
	mm	in	mm	in	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	5	57.2	2-1/4	9150	121	2.38:1
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	158.8	71.4	2-13/16	9150/9450	150	2.63:1
NC50-70(4-1/2IF)	177.8	7	57.2	2-1/4	9150/9450	164.7	2.54:1
NC56-77	196.8	7-3/4	71.4	2-13/16	9150/9450	185.3	2.70:1
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
We can supply full size drill collar with API 5D/5DP, Please leave a message for consultation.

 

Drill pipe
Size(in)	OD of Pipe Body(mm)	Wall Thickness of Pipe Bodymm
2.3/8" to 6.5/8"	60.32-168.28	7.11-12.70