API Spec 7-1 High Torsional Resistance Square Kelly for Drilling String

• After-sales Service: 1year
• Warranty: 1year
• Manufacturing Process: Forging
• Surface Treatment: Polishing
• Operation Pressure: Atmospheric Pressure
• Material: Alloy
• Model NO.: API
• Type: Drilling Tools
• Certificate: API
• Brand: Lake
• Use: Drilling
• Transport Package: /
• Specification: /
• Trademark: /
• Origin: China
• Production Capacity: 50000pieces/Year

Product Description

Product Description

Kellys are manufactured with one of two drive configurations, square or hexagonal. Square kellys are furnished as forged or machined in the drive section. Hexagonal or fully machined square kellys are machined from full length quenched and tempered round bars.

Square Kelly and hexagonal kellys are fabricated as per requirements of customers. The kellys are made of AISI 4142H-4145H forged or rolled alloy structural steel. Quenching plus tempering thermal treatment will be conducted over the whole length. Its Brinell hardness can reach 285-341 on the basis of such thermal treatment. Charpy impact energy: >or =54J. The formulated process can ensure that the misalignment of the hole reaches the standard wall thickness. Kelly bars are manufactured according to API-7-1 Spec.

 

Product Parameters

Nom. Size (in)	Top Connection(LH)		Bottom Connection		I.D. (in)		Drive Section (in)
	Standard O.D.(in)	Optional O.D.(in)	Square O.D.(in)	Hex. O.D.(in)	Square	Hex.	A	B
2-1/2	6-5/8REG 7-3/4	4-1/2REG 5-3/4	NC26		1-1/4		3-2/7
3	6-5/8REG 7-3/4	4-1/2REG 5-3/4	NC31   4-1/8	NC26   3-3/8	1-3/4	1-1/4	4	3-3/8
3-1/2	6-5/8REG 7-3/4	4-1/2REG 5-3/4	NC38   4-3/4	NC31   4-1/8	2-1/4	1-3/4	4-1/2	4
4-1/4	6-5/8REG 7-3/4	4-1/2REG 5-3/4	NC46   6-1/4	NC38   4-3/4	2-4/5	2-1/4	5-4/7	4-4/5
	6-5/8REG 7-3/4	4-1/2REG 5-3/4	NC50   6-3/8	NC38   4-3/4	2-4/5	2-1/4	5-4/7	4-4/5
5-1/4	6-5/8REG 7-3/4		5-1/2FH   7	NC46   6-1/4	3-1/4	3	7	6
	6-5/8REG 7-3/4		NC56     7	NC50   6-3/8	3-1/4	3-1/4	7	6
6	6-5/8REG 7-3/4			5-1/2FH   7		3-1/2		6-4/5
	6-5/8REG 7-3/4			NC56    7		3-1/2		6-4/5

Company Profile

Business type	Custom manufacturer	Country / Region	Shandong, China
Main Products	Liner, Piston, Valve Assy, Swivel Joint, Hammer Union	Total employees	11 - 50 People
Total Annual Revenue	2300000	Year established	2011
Major Clients	Confidential	Certifications(3)	ISO 45001, ISO9001, ISO14001
Product Certifications	-	Patents	-
Trademarks	-	Main Markets	Eastern Europe 26.00% Mid East 23.00% North America 15.00%

FAQ

 

How to order?

Please send us your inquiry with detail item description or with Model number.

If there is no packing demand we take it as our regular exported standard packing.

We will offer you an order form for filling. We will recommend you the most suitable model according to information you offered.

You send us your detail requirement, we provide quotation to you.

Can I expect a quality products?

All the production and processing are strictly according to ISO 9001:2008 and API standard. At the same time, mature production technology ensuring the quality satisfy international request. We also welcome the third party inspection, such as BV, SGS and TUV.

 

The information you may like to know before Payment:

 

1. Methods of Payment:

T/T (Telegraphic Transfer) or L/C at sight

 

2. Shipping way

Sample order: we suggest Courier express like DHL/UPS/TNT/FEDEX or by air

Bulk order: we suggest by air or by sea.

 

3. Quality Control

We have our own experienced QC.

There will be strict inspection and testing for every order before shipping out.