API 7-1 Certified 4′′ 5′′ Kelly Bar AISI 4145h for Drilling Rigs

• Customization: Available
• After-sales Service: 24/7
• Warranty: 1 Year
• Model NO.: Square & Hex
• Certification: API
• Standard: API 7K
• Surface Treatment: Spray-Paint
• Manufacturing Process: Machining
• Material: Alloy Steel
• Weight (Kg): 150
• Condition: New
• Usage: Oilwell
• Processing Type: Forging
• Machine Type: Tubular Handling Tools
• Use: Well Drilling
• Size: A6c 6600 6800
• Color: Request
• Showroom Location: None
• Name: Ks Kelly Spinner
• Video Outgoing-Inspection: Provided
• Type: Power Tools
• Applicable Industries: Energy & Mining
• Product Name: Ks A6c 6600 6800 Kelly Spinner for Sale
• Transport Package: Kelly Jacket
• Specification: Up to the quantities
• Trademark: GOLDENMAN
• Origin: China
• Package Size: 1200.00cm * 260.00cm * 350.00cm
• Package Gross Weight: 360.000kg

Product Description

Square & Hex Kelly

The Kelly is a key component in the rotary drilling system, transferring rotary motion from the rotary table or top drive to the drill string. It's a heavy square or hexagonal steel pipe that fits into the Kelly bushing and passes through the rotary table, enabling efficient torque transmission and fluid circulation.

 

Technical Specification
 

Parameter	Hex Kelly	Square Kelly
OD	3 3/4'', 4'', 4 1/4'', 5''	3'', 3 1/2'', 4 1/4'', 4 1/4''
Length	37', 38', 40' 46'	37', 38', 40', 46'
Material	AISI 4145H-Modified Alloy Steel	AISI 4145H-Modified Alloy Steel
Connection Type	NC31, NC38, NC50, 6-5/8 REG	NC31, NC38, NC50, 6-5/8 REG
Hardness (HRC)	285-341 (HBW)	285-341 (HBW)
Tensile Strength	≥950 MPa	≥950 MPa
Yield Strength	≥758 MPa	≥758 MPa

All Kellys are manufactured per API Spec 7-1 and are API Monogrammed

Features:
-Made from AISI 4145H-Modified Alloy Steel, quenched and tempered.
-Precision-machined with phosphate-coated threads.
-Full-length hardbanding on the drive surface to reduce wear and prolong lifespan.
-Available in hexagonal or square cross-section, matching various rig types.
-API 7-1 Certified, ensuring global standards compliance.

Advantages:
- Superior wear resistance and structural strength.
- Excellent torque transfer with minimal deformation.
- Customizable lengths and connections upon request.
- Smooth and efficient rotary drive even under extreme loads.
- Pre- and post-heat treated for enhanced mechanical performance.

Benefits:
- Reduces rig downtime due to high durability and reliability.
- Increases drilling efficiency and tool longevity.
- Easy integration into existing rig systems.
- Lower operational cost due to fewer replacements.

Reasons to Buy:
- Trusted by leading drilling contractors worldwide.
- Competitive pricing with strict QC in every production stage.
- Stock availability for quick delivery.
- Experienced technical support and customization options.