Carbon Steel 3 3/8" Spiral Non Magnetic Drill Collars 79.4mm To 300mm

Basic Information
Place of Origin: Hebei China
Brand Name: Pangolin
Price: Negotiable
Packaging Details: According to customer needs
Delivery Time: 5-15work days
Payment Terms: T/T
Detail Information
Type: Drill Collar Size: 79.4-300mm
Applicable Industries: Energy & Mining Diameter: 3 3/8"- 8 1/2"
Length: 9150 Or 9450 Material: Carbon Steel, Alloy Steel
High Light:

3 3/8" non magnetic drill collars 79.4mm


79.4mm non magnetic drill collars


79 4mm 300mm spiral drill collar non magnetic

Product Description

3 3/8" Carbon Steel Well Drilling Non Magnetic Drill Collars


The non-magnetic drill collar is made of low carbon high chromium manganese alloy steel. After strict chemical composition refinement, the mechanical properties are achieved through forging. When the magnetic field intensity is 1×105 /4πA/m, the relative permeability of the non-magnetic drill collar μr≤1.010. The gradient of the magnetic induction intensity of the non-magnetic drill collar at any interval of 100mm along the inner hole is ≤0.05μT.
Non-magnetic drill collars have unusual design requirements, and as a result pose unique problems of corrosion resistance. Drill collars are the bottom components in a drill string, where their weight generates the force on the drill bit allowing it to drill and their stiffness allows the force to be transmitted without buckling. Conventional drill collars are made of alloy steel, like the rest of the drill string, and their corrosion usually poses no problems except to their threaded connections. A typical drill collar is 30 feet long and 4 to 9 inches in diameter.


Product parameters

Machine Type Drilling Tool
Material Carbon Steel
Processing Type Forging
Use Well Drilling
bit size 3 3/4"(95mm)
connected thread 2 7/8''reg
lobe 5:6
stage 4
flow rate 162-578 lpm
rotory speed 121-432rpm
working pressure loss 3.2mpa
output torque 613 N.m
output power 36kw
Applicable Industries Building Material Shops, Machinery Repair Shops, Construction works , Energy & Mining


Model ToolOD mm Connecting Thread For Mud motor IADC
4 1/8” 108 2 7/8IF 5LZ95x7.0L-5-600







5” 127 3 1/2IF 5LZ120x7.0-5-864
6 3/4” 172 4 1/2IF 5LZ165x7.0-5-840
7 1/2” 190 5 1/2FH 5LZ172x7.0-5-840
8 1/4” 210 6 5/8FH 5LZ203x7.0 -5-840


Since all magnetic measuring instruments sense the borehole's geomagnetic field when measuring the direction of the borehole, the measuring instrument must be in a non-magnetic environment. However, in the drilling process, the drilling tool is often magnetic and has a magnetic field, which affects the magnetic measuring instrument and cannot obtain the correct wellbore trajectory measurement information data. The use of a non-magnetic drill collar can implement a non-magnetic environment and has the characteristics of a drill collar during drilling .


It has good low permeability and high strength. Mechanical properties, excellent intergranular corrosion cracking resistance and excellent wear resistance.


Used in
Pipeline transportation, boiler tubes, hydraulic/automotive tubes, oil/gas drilling, food/beverage/dairy products, machinery industry, chemical industry, mining, construction and decoration, special purpose.


Pic Show

Carbon Steel 3 3/8" Spiral Non Magnetic Drill Collars 79.4mm To 300mm 0



Drill bit hole opener HDD drilling reamer positioning drilling tool 1


Pangolin (China) Construction Machinery Co., Ltd. is a drill manufacturer with complete testing equipment and strong technical force. Our products have a wide range, high quality, reasonable price, and timely delivery, which are widely used in oilfields, drilling, non-excavation fields and other industries. Our products are widely recognized and trusted by users, and can meet the ever-changing economic and social needs. To
We welcome new and old customers from all walks of life to contact us for future business relations and mutual success!


Drill bit hole opener HDD drilling reamer positioning drilling tool 2



1. How to order the products?
A: Please send the inquiry with detail item description or with Model number.

2. How about the common packing?
A: If there is no special packing demand, we will take it as our normal packing. First in small carton, and then put in the bigger carton together to make sure goods completed.

3. Can I expect a quality products?
A: Yes. mature production technology ensuring the quality satisfy international request.

4. How to check the product are the exact one you want?
A: If possible, please attach one reference picture to avoid any misunderstanding or any links from our website for a better understanding.

5. How to control quality?
A: We have our own experienced QC team,there will be strict inspection and testing for each order before shipping out.

6. Fast delivery time:
A: Usually it takes 25 days for production.only 3 or 5 days if we have stock of your request size.

7. Competitive price:
A: Our factory can supply you the lowest price due to direct sale to customers without distributor!


Contact Details
Sophie Zhang

Phone Number : +86-13231687581

WhatsApp : +8613231687581