API 7-1 Non-Magnetic Drill Collar OD 79.4mm to 279.4mm

Description

Material of API 7-1 Non-Magnetic Drill Collar OD 79.4mm to 279.4mm:

4145H/4145H mod or Non-magnetic

Standard: API7-1, NS-1

1. 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.

Drill collar is manufactured strictly from API Spec7-1 and SY5411 standards.
2. Spiral Drill Collar
Note: Spiral non magnetic drill collar material is using to reduce contact area with a hole,so as to avoid efficiently bit sticking from differential
pressure.

The drill collars are manufacturing strictly according to API Spec7-1 and Standard SY5144.
3. Spiral Drill Collar With Elevator Groove And Slip Groove
Note: Elevator groove and slip groove made on box thread face,of slick non magnetic drill collar material or spiral drill collar can be using as lifting
sub and safety slip when tripping out.

Technical parameters for elevator groove and slip groove are as per API SPEC7-1. Hardbanding s optional at customers’ requests.
4. Non-magnetic Drill Collar
The cold-rolled finish on both ID and OD surface,with a unique technical process strengthens the structure,and ensures the tools with optimal resistance to stress, corrosion, cracking and mechanical performance is greatly enhancing.

High-Quality API 7-1 NS-1 Non-Magnetic Drill Collar

 

Connections OD
mm
ID
mm
Length
mm
NC23-31 79.4 31.8 9150
NC26-35 88.9 38.1 9150
NC31-41 104.8 50.8 9150 or 9450
NC35-47 120.7 50.8 915 or 9450
NC38-50 127.0 57.2 9150 or 9450
NC44-60 152.4 57.2 9150 or 9450
NC44-60 152.4 71.4 9150 or 9450
NC44-62 158.8 57.2 9150 or 9450
NC46-62 158.8 71.4 9150 or 9450
NC46-65 165.1 57.2 9150 or 9450
NC46-65 165.1 71.4 9150 or 9450
NC46-67 171.4 57.2 9150 or 9450
NC50-67 171.4 71.4 9150 or 9450
NC50-70 177.8 57.2 9150 or 9450
NC50-70 177.8 71.4 9150 or 9450
NC50-72 184.2 71.4 9150 or 9450
NC56-77 196.8 71.4 9150 or 9450
NC56-80 203.2 71.4 9150 or 9450
6 5/8REG 209.6 71.4 9150 or 9450
NC61-90 228.6 71.4 9150 or 9450
7 5/8REG 241.3 76.2 9150 or 9450
NC70-97 247.6 76.2 9150 or 9450
NC70-100 254.0 76.2 9150 or 9450
8 5/8REG 279.4 76.2 9150 or 9450

 

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