Leave Your Message

CONTACT
Leave Your Message
Whatsapp
E-mail
+8618064372860
4145H&Non-Mag Drill Collar Manufacturing
Products Categories
Featured Products
Hydraulic Make-up&Breakout Machine（Bucking Unit)

Hydraulic Make-up&Breakout Machine（Bucking Unit)
Casing&Tubing Swaging machine(Reduce&expand pipe size)

Casing&Tubing Swaging machine(Reduce&expand pipe size)
Pipe Rust Removal system/Derusting machine manufacturer

Pipe Rust Removal system/Derusting machine manufacturer
Integral Blade String&Nearbit Stabilizer

Integral Blade String&Nearbit Stabilizer
API 5DP Drill Pipe Manufacturing

API 5DP Drill Pipe Manufacturing
API Spec 7K Certified Hydraulic Power Tongs Manufacturing

API Spec 7K Certified Hydraulic Power Tongs Manufacturing
Well control equipment

Well control equipment
Pipe Weighing Equipment Manufacturer

Pipe Weighing Equipment Manufacturer
Pipe Length Measurement equipment manufacturer

Pipe Length Measurement equipment manufacturer
Pipe Inkjet Marking Equipment Manufacturer

Pipe Inkjet Marking Equipment Manufacturer
01
Drill collar 1.jpg
WechatIMG373.jpg
Drill collar 4.jpg
Drill collar 5.jpg
Drill collar.jpg
Drill-collar-3.jpg
Non-Mag drill collar.jpg

4145H&Non-Mag Drill Collar Manufacturing

Drill Collars transfer torque from the top drive or rotary table to the drill bit with minimal energy loss.They also provide weight on bit (WOB) to enhance drilling efficiency and stabilize the bottom hole assembly (BHA) by resisting bending and whipping during rotation. This significantly reduces vibration and wear on downhole tools, improving drilling accuracy and extending equipment life.

Manufactured from high strength AISI 4145H modified alloy steel and non-magnetic materials, all drill collars strictly comply with API Spec 7-1, GOST, and NS-1 standards. The materials are fully quenched and tempered to achieve optimized mechanical properties, ensuring durability and reliability under demanding drilling conditions.

    Contact us Whatsapp
    product Information

    Drill Collar Testing

    1. All drill collar materials undergo both chemical composition and mechanical property testing prior to machining.
    2. Each collar is subject to 100% ultrasonic testing (UT) and magnetic particle inspection (MPI) to detect internal and surface defects.
    3. Hydrostatic testing is performed to verify pressure integrity and seal performance.
    Drill collar 2
    Drill collar 4
    Drill collar 5

    Drill collar Features

    ✔Made from 4145H modified alloy steel and non-magnetic materials, suitable for drill collars, spiral drill collars, lifting subs, and crossover subs.
    ✔Manufactured strictly in accordance with API Spec 7-1, GOST, and NS-1 quality standards.
    ✔TAKELO offers proprietary double shoulder connections and other premium thread designs, with optional cold-rolled thread roots, phosphatizing, nitriding, or tungsten alloy plating to enhance performance and longevity.
    ✔Optional services include various types of hardbanding and internal plastic coating (IPC) based on customer specifications.
    ✔All drill collars are equipped with advanced thread root cold-rolling and optional phosphatizing treatment to enhance fatigue resistance and minimize galling during make-up and breakout cycles. Thread protectors are used throughout handling and transportation.
    ✔Optional surface treatments such as tungsten alloy plating, nitriding, and internal plastic coating (IPC) are available to improve corrosion resistance in high-salinity or sour gas environments, extending service life in harsh drilling conditions.

    Drill Pipe Features

    Size

    O.D(mm)

    I.D.(mm)

    Code

    Thread

    Length(mm)

    3 1/8

    79.4

    31.8(1-1/4)

    NC23-31

    NC23

    9140

    3 1/2

    88.9

    38.1(1-1/2)

    NC26-35

    NC26

    9140

    4 1/8

    104.8

    50.8(2)

    NC31-41

    NC31

    9140/9450

    4 3/4

    120.6

    50.8(2)

    NC35-47

    NC35

    9140/9450

    5

    127

    57.2(2-1/4)

    NC38-50

    NC38

    9140/9450

    6

    152.4

    57.2(2-1/4)

    NC44-60

    NC44

    9140/9450

    71.4(2-13/16)

    NC44-60

    9140/9450

    6 1/4

    158.8

    57.2(2-1/4)

    NC44-62

    NC44

    9140/9450

    71.4(2-13/16)

    NC46-62

    9140/9450

    6 1/2

    165.1

    57.2(2-1/4)

    NC46-65

    NC46

    9140/9450

    71.4(2-13/16)

    NC46-65

    NC50

    9140/9450

    6 3/4

    171.4

    57.2(2-1/4)

    NC46-67

    NC46

    9140/9450

    7

    177.8

    57.2(2-1/4)

    NC50-70

    NC50

    9140/9450

    71.4(2-13/16)

    NC50-70

    9140/9450

    7 1/4

    184.2

    71.4(2-13/16)

    NC50-72

    NC50

    9140/9450

    7 3/4

    196.8

    71.4(2-13/16)

    NC56-77

    NC56

    9140/9450

    8

    203.2

    71.4(2-13/16)

    NC56-80

    NC56/6-5/8REG

    9140/9450

    8 1/4

    209.6

    71.4(2-13/16)

    6-5/8REG

    6-5/8REG

    9140/9450

    9

    228.6

    71.4(2-13/16)

    NC61-90

    NC61

    9140/9450

    9 1/2

    241.3

    76.2(2-13/16)

    7-5/8REG

    7-5/8REG

    9140/9450

    9 3/4

    247.6

    76.2(3)

    NC70-97

    NC70

    9140/9450

    10

    254

    76.2(3)

    NC70-100

    NC70

    9140/9450

    11

    279.4

    76.2(3)

    8-5/8REG

    8-5/8REG

    9140/9450

    Make an free consultant

    Your Name*

    Phone Number

    Country

    Remarks*