Square and Hexagonal Kelly Drilling Pipe for Downhole Drill String API Complied

• Manufacturing Process: Forging
• Surface Treatment: Spray-Paint
• Operation Pressure: Atmospheric Pressure
• Model NO.: Kelly Pipe
• Material: Alloy
• Delivery Time: 15-20days
• Service: OEM&ODM
• Package: Carton
• QC: High Quality
• Transport Package: Plywood Box
• Specification: as your request
• Origin: China
• HS Code: 84314310
• Production Capacity: 50000 Sets/Year

Product Description

Product Description

Drilling Kellys
Kelly is main driver of the whole drill string. It transmits torsional energy from the rotary table through the drill string to the bit at the bottom of the hole. JX Petro Kelly is a long square or hexagonal, precision machined heavy steel bar that is supported by the swivel through the rotary table and is connected to the first joint of drill pipe in the drill string.

Straightness of the kelly is very crucial in the manufacturing process, thus straightness inspections are carried out before, during and after each machining operation. The flats are precision-milled to API specifications. All milling processes are performed on specially designed rigid Kelly mills to ensure tight tolerances and high quality drive sections. Each Kelly is furnished with a pressed steel thread protectors.

Pictures:
Features and Specifications:
 Manufactured from AISI 4145H-modified, fully heat-treated alloy steel with a
Brinell hardness range of 285-341BHn and a minimum average Charpy impact
value of 40 ft-lbs;
 Ends and drive sections, IDs and connections machined and inspected to API
specifications;
 Ultrasonic inspection is performed on all sections;
 Shipped in a protective steel-cased scabbard;

 

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

 

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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.