Oilfield Drilling Rig Square Kelly Drill Pipe for Sale

• Customization: Available
• After-sales Service: Effective
• Warranty: Effective
• Model NO.: All
• Manufacturing Process: Stamping
• Surface Treatment: Oxidation
• Operation Pressure: Atmospheric Pressure
• Material: Rubber
• Transport Package: Common Export Packaging
• Trademark: YINGPAI
• Origin: Hebei
• HS Code: 841391
• Production Capacity: 50000pieces/Year

Product Description

Product Description

 

 

 

Kelly is the drive part of whole drill stem, it has two types, square kelly and hexagonal kelly and all of them are manufactured comfort to API Spec7-1 and SY/T6509-2000 criterion.

Our Square& Hexagonal kelly are made from AISI 4145H modified alloy bars that are quenched and tempered full length. After such heat treatment, its brinell hardness can reach 285-341. Kelly's end, drive cross-section and joint are all processed and tested comform to API criterion.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.

The Main Technical Specification of Kelly ( Square& Hexagonal ) 

Norminal Size (in)	Length(ft)	Top Upset Joint		Bottom Upset Joint		Bore D	Drive Section
		API BOX Thread Left Hand	Du	Right Hand Connections	DL		Across Corners	Across Flates
3-1/2	40	6 5/8REG	7 3/4	NC38(3 1/2IF)	4 3/4	2 1/4	4.437	3 1/2
4-1/4	40	6 5/8REG	7 3/4	NC46 (41F) NC50(4 1/2IF)	6~6 3/8 6 1/8~6 3/8	2 13/16	5.500	4 1/4
5-1/4	40	6 5/8REG	7 3/4	NC50 5 1/2FH	7	3 1/4	6.750	5 1/4
6	40	6 5/8REG	7 3/4	NC50	7 3/4	3 1/2	7.625	6

 

 

There are different kinds of drill collars,including round drill collar,spiral drill collar,non-magnetic drill collar,square drill collar and so on.Ordinary drill collar is the circular cross section, the center has a water hole,the wall thickness is larger,the nozzle is smaller, the weight of per unit length is greater than the size of drill pipe almost 4- 5 times .The majority of drill collar is thread processing directly on the pipe body , but some of them also use the replaced joint.

Features

(1)Eccentric-weight drill collar is an effective anti-deviation drilling tool,with high drill pressure used in oblique areas,rectifying oblique as well.

(2)When drilling directional wells eccentric-weight drill collar is an effective tool to reduce oblique or straighten the well hole using high drilling pressure.

(3)Eccentric-weight drill collar has the advantages of simple structure,convenient use,connected directly to common drill collar without centralizers,greatly convenient for sinking in,fishing and milling operations.

(4)Eccentric-weight drill collar runs downhole safely,danger of leakage or bit freezing hard to appear.

(5)Pay much attention to avoid mud balling and prevent effect of anti-deviation .

 

Company Profile

Hebei Yingpai has always taken "serving customers" as its purpose, adhering to the concept of "product quality first", and providing customers with a three-in-one system solution of "production, sales, and service".

Products include oil and gas drilling equipment and accessories, industrial standard parts, mechanical equipment and accessories, etc.

The company strictly implements the quality inspection and technical service system, and has established long-term cooperative relations with large equipment companies such as China National Petroleum Corporation, Lanshi, Honghua, Jerry, and Kerui.

 

As a professional integrated trading and manufacturing company, we highly value the cooperative relationship with our customers. We will always prioritize your needs and provide high-quality services and solutions to help you achieve business success. Hebei Yingpai is ready to work hand in hand with you, mutually dependent and mutually beneficial, for a better tomorrow.
 

Certifications

 

Packaging & Shipping

 

FAQ

 

1,Q. How long for your delivery time?
A. It will take about 15-35days to finish an order, but the exact time is according to actual situation.

2,Q. Can you offer OEM or design services? 
A. Yes, we have our own design department. We can make OEM products according your requirements. 

3,Q.How long is the warranty? 
A. 1 year