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HOME >Leading Products >Kelly
Kelly

4 1/4 in
Design Specifications
Length (ft) 40
Standard or optional Standard
Top Connection Connection : 6 5/8REG
OD(in) : 7 3/4
Operating Parameters
Bottom Connection Connection : NC38
OD(in) : 4 3/4
Across Corners DC (mm) 122.2
ID (in) 2 1/4
Weight (kg) 765





●API Hexagonal Kelly,Product Schematic Diagram.

六方钻杆示意图.jpg

Kelly is the driven part of the whole drill string.

Kelly is divided into Square Kelly and Hexagonal Kelly. WOLFNI Kelly all conform to API Spec7-1.

The length of Kelly extends from 11meters, 12meters,16meters,and to the longest 27 meters.(connected with tool joint of high torsion resistance)



API Hexagonal Kelly            

               

Size

(in)


               

Length                

(ft)                

Standard                 

or                 

optional                

Top Connection             Bottom Connection             Across Corners            

               

ID                

(in)                


               

Weight (kg)
           
Connection            

OD                

(in)                

Connection            

OD                

(in)                

DC                 

mm                

3"
            		40 Standard             6 5/8REG             7 3/4 NC26 3 3/8 85.7 1 1/4 462
40 Optional             4 1/2REG             5 3/4 NC26 3 3/8 85.7             1 1/4             431
3 1/2"
            		40 Standard             6 5/8REG             7 3/4 NC31             4 1/8 100.8 1 3/4             561
40 Optional             4 1/2REG             5 3/4 NC31             4 1/8 100.8 1 3/4             531
4 1/4" 40 Standard             6 5/8REG             7 3/4 NC38             4 3/4 122.2 2 1/4             765
40 Optional             4 1/2REG 5 3/4 NC38             4 3/4             122.2 2 1/4             735
5 1/4" 40 Standard             6 5/8REG             7 3/4 NC46             6 1/4 151.6 3             1069
40 Standard             6 5/8REG             7 3/4 NC50             6 3/8 151.6 3 1/4             996
6" 40 Standard             6 5/8REG             7 3/4 5 1/2FH 7 173.0 3 1/2             1345
40 Standard             6 5/8REG             7 3/4 NC56             7 173.0 3 1/2             1343


With advanced sales network, our products

export to Russia, Germany, Czech Republic,

Iran, UAE,  Kuwait, India, Kazakhstan, 

Indonesia, Algeria, Argentina, Brazil, etc.

六方钻杆图纸.jpg


1. Product: Hexagonal drill kelly

2. Supply range: 3"- 6"

3. Packing: anti-rust package, steel shelf with plastic bags

4. Standard: API Spec 7-1 or SY/T6509 Standard. 

5. Delivery time: within 30 days 

6. Test: Ultrasonic test, tensile test, impact test, hardness test, etc.

7. Mechanical Propriety :conforming to API 7-1 and 5D 


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