Oil Field Using Square Kellys Square Kelly

Model: Drill pipe
Place of Origin: Shaanxi,China (Mainland)
Length: 9150 or 9450 mm
Test: UT&MT test
Manufacture technique: Hot forged and heat treated
Material: AISI4145H
Use: Well Drilling
OD: 79.4 - 279.4 mm
Connection: NC23-31,NC31-41,NC35-47,NC38-50,NC44-60,NC50-70,7 5/8REG, 8 5/8REG
Processing Type: Processing Type
Certification: Certification
Machine Type: Drilling Tool


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Product Description

Payment & Shipping Terms Supply Capacity
Unit Price:1.0 USDProduction Capacity:1000 pce per month
Trade Term:FOB,CFR,CIF,DDP,DAP,CIP,CPT,FCA,EXWPacking:Standard export...
Payment Terms:L/C, T/TDelivery Date:30 days
Min. Order:1 Piece/Pieces
Means of Transport:Ocean, Air, Land

Forged Oil Field Using Square kelly  square kelly

It is mainly used between the drill head and the drill pipe, so that it can make the drill head work reposefully and keep right trace by providing

the pressure and weight for drill head.

Xinhua Forgings mainly include: Drill tools, stabilizers, Forged mill rollers,Forged shafts,Forged bars, round hollow bars,Forged piston, Forged cylinders,Forged Rring&discs,Pipe Mold,etc.


Forged Oil Field Using Round Drill Collar

It is the round pipe with smooth surface and thick wall, and the both ends are machined screw thread for connection.


Material:Non-magnetic Alloy steel
Processing Type:Forging
Use:It is mainly used between the drill head and the drill pipe, so that it can make the drill head work reposefully and keep right trace by providing the pressure and weight for drill head.
OD:79.4 - 279.4 mm
Manufacture technique:Hot forged and heat treated
Test:UT&MT test
Length:9150 or 9450 mm
Connection:NC23-31,NC31-41,NC35-47,NC38-50,NC44-60,NC50-70,7 5/8REG, 8 5/8REG
Test reportsChemical Composition, Physical Properties and Mechanical Testing according to the customer's requirement
Surface finishes:Black, Peeled, Turned & Polished
Delivery condition:Hot forged, Heat-treatment (Normalized / Annealed / Quenched / tempered), Rough machining.
Process:EAF + LF + VD +(ESR) + Forged + Heat Treatment (optional)

material of non-magnetic

 drill collars

Non magnetic steel
Standard:API Spec 7-1 or SY/T5144 Standard.

Length Bevel Diameter Df  mmReference Bending Strength Ratio


NC23-3179.43 1/831.81 1/4915076.22.57:1
NC26-3588.93 1/238.11 1/2915082.92.42:1
NC31-41104.84 1/850.829150 or 9450100.42.43:1
NC35-47120.74 3/450.82915 or 9450114.72.58:1
NC38-50127557.22 1/49150 or 94501212.38:1
NC44-60152.4657.22 1/49150 or 9450144.52.49:1
NC44-60152.4671.42 13/169150 or 9450144.52.84:1
NC44-62158.86 1/457.22 1/49150 or 9450149.22.91:1
NC46-62158.86 1/471.42 13/169150 or 94501502.63:1
NC46-65165.16 1/257.22 1/49150 or 9450154.82.76:1
NC46-65165.16 1/271.42 13/169150 or 9450154.83.05:1
NC46-67171.46 3/457.22 1/49150 or 9450159.53.18:1
NC50-67171.46 3/471.42 13/169150 or 9450159.52.37:1
NC50-70177.8757.22 1/49150 or 9450164.72.54:1
NC50-70177.8771.42 13/169150 or 9450164.72.73:1
NC50-72184.27 1/471.42 13/169150 or 9450169.53.12:1
NC56-77196.87 3/471.42 13/169150 or 9450185.32.70:1
NC56-80203.2871.42 13/169150 or 9450190.13.02:1
6 5/8REG209.68 1/471.42 13/169150 or 9450195.72.93:1
NC61-90228.6971.42 13/169150 or 9450212.73.17:1
7 5/8REG241.39 1/276.239150 or 9450223.82.81:1
NC70-97247.69 3/476.239150 or 9450232.62.57:1
NC70-1002541076.239150 or 9450237.32.81:1
8 5/8REG279.41176.239150 or 9450266.72.84:1

OD.Yield strengthTensile strengthElongation

Brinell Hardness


Charpy impact energy
79.4~171.43 1/8~6 3/4≥758≥965≥13≥285≥54



Steel material standard: ASTM,AISI DIN, BS, CA, AS, ISO and GB standard.

Customers put forward material requirement, mechanical properties and tolerance, maybe full set of engineering Drawing, designing requirement, then our manufacturer will termwise check drawings scrupulously and completely understand technical parameter.There'll be once or twice technical exchange between both parties, or any ameliorating. Everything is ready, next to manufacturing, acceptance and delivery.

We are looking forward to your inqury with detailed requirements.

Category: Drill Tools

Related Category: Drill Stabilizer and Stabilizer Forging  Drill Pipe/HWDP/Drill Collar