API-7-1 76mm Well Drilling Hexagonal Kelly

• Customization: Available
• Manufacturing Process: Forging
• Surface Treatment: Spray-Paint
• Model NO.: kelly
• Operation Pressure: Atmospheric Pressure
• Material: Cast Steel
• Machine Type: Kelly
• Application1: Energy & Mining/Petroleum Machinery Parts
• Transport Package: Wooden Box
• Specification: CUSTOM MADE
• Trademark: JX PETRO
• Origin: Dongying
• HS Code: 84314310
• Production Capacity: 2000PCS/Month

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.

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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Packaging & Shipping

FAQ

1) How can I place order?

A: You can contact us by email about your order details, or place order on line.

2) How can I pay you?

A: After you confirm our PI, we will request you to pay. T/T and Western Union are the most usual ways we are using.

3) What's the order procedure?

A: First we discuss order details, production details by email or TM. Then we issue you an PI for your confirmation. You will be requested to do pr -epaid full payment or deposit before we go into production. After we get the deposit, we start to process the order. We usually need 15-25days if we don't have the items in stock. Before production has been finished, we will contact you for shipment details, and the balance payment. After payment has been settled, we start to prepare the shipment for you.

4)How do you take care when your clients received defective products?

A: replacement. If there are some defective items, we usually credit to our customer or replace in next shipment.

5)How do you check all the goods in the production line?

A: We have spot inspection and finished product inspection. We check the goods when they go into next step production procedure.