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Drill collars are heavy, thick-walled tubular components used in oil and gas drilling operations. They are placed in the drill string near the drill bit to provide weight on the bit, maintain drill string stiffness, and facilitate efficient drilling. While there are variations in design and specifications, the following are the commonly used types of drill collars:

* Slick Drill Collars
* Spiral Drill Collars
* Non-Magnetic Drill Collars
* Flex Collars

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Key attributes

Warranty

1 Year

Applicable Industries

Energy & Mining

Weight (KG)

50

Showroom Location

None

Video outgoing-inspection

Provided

Machinery Test Report

Provided

Marketing Type

New Product 2020

Country of Origin

China

Condition

New

Type

Drill Collar

Machine Type

Drilling Tool

Material

Carbon steel

Processing Type

Hot Roll

Use

Well Drilling

Product name

API 7-1 Non-Magnetic Drill Collar Slick Drill Collar

material

AISI4145H

Application

Drilling

Color

As Request

Advantage

High Performance

Usage

Hole Drilling

Name

Drill Collar

Size

79.4-279.4mm

Length

9150 or 9450

Packaging and delivery

Packaging Details

Steel shelf, 40' container

Port

Xingang Port, China

Supply Ability

Supply Ability

1000 Piece/Pieces per Month API 7-1 Non-Magnetic Drill Collar Slick Drill Collar

Lead time

Quantity (pieces)

1 - 1

> 1

Lead time (days)

10

To be negotiated

Products Description

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

1. Material of API 7-1 Non-Magnetic Drill Collar Slick Drill Collar OD 79.4mm to 279.4mm: 4145H/4145H mod 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.
High Quality API 7-1 NS-1 Non-Magnetic Drill Collar
Specifications for API 7-1 Non-Magnetic Drill Collar Slick Drill Collar OD 79.4mm to 279.4mm


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


 

 

Certifications

 

About Us

 


FAQ


Q: What documents you provide ?

A: CI, PL, BL, MTC EN10204 3.1, COO

Q: How long is your delivery time?

A: Generally it is 5 days if the goods are in stock. or it is 40-50 days if the goods are not in stock, it is according to quantity. 

Q: Do you provide samples ? is it free or extra ?

A: Yes, we could offer the sample, 1-10 pcs are okay. While sample is not free of charge.

Q: What is your terms of payment ?

A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance, balance before shipment. 


If you have another question, pls feel free to contact us at sales@and-steel.com. 


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