Square Kelly and Hexagonal Kelly

Square Kelly and Hexagonal Kelly

The kelly is located at the top of the drill string and is available in square and Hexagonal forms.
In rotary table drilling, when drilling, the Kelly is matched with the square and the rotary table to transfer the ground rotary table torque to the drill pipe to drive the drill bit to rotate, and bear the weight of the drill string.In the drilling of turbine and screw, it bears the weight of the drill string and the reaction torque.
Standard:API SPEC 7-1,SY/T6509-2000
Size: Full range from 2-1/2”--6”
Material”AISI 4145H alloy steel

Specification

Normal Size(in)

Top Connection(LH)

Bottom Connection

I.D.(in)

Drive Section(in)

Standard O.D.(in)

OptionalO.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 85.7


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

NC384-3/4

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

NC384-3/4

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

NC46 6-1/4

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


NC50 6-3/8

NC46 6-1/4

3-1/4

3

7

6

6-5/8REG 7-3/4


5-1/2 FH 7

NC50 6-3/8

3-1/4

3-1/4

7

6

6

6-5/8REG 7-3/4


NC56 7

5-1/2FH 7


3-1/2


6-4/5

6-5/8REG 7-3/4



NC56 7


3-1/2


6-4/5

 

 


Related Products
API-5CT standard EUE Tubing coupling
API-5CT standard EUE Tubing coupling
Wire Wrap Screen jacket with End Ring
Wire Wrap Screen jacket with End Ring
Big OD oil Casing pipe
Big OD oil Casing pipe
API 5CT Premium Connection Threading pH6 Vam Top Tpcq Tubing Casing Pipe
API 5CT Premium Connection Threading pH6 Vam Top Tpcq Tubing Casing Pipe
Categories
Hot Products
  • standard OD oil Casing pipe

    standard OD oil Casing pipe

    Description: Size:4-1/2"~30": Thread:LC,SC,BC.RT—BC,100% replace premium connection，for example:Vam and Hunting Grade:All grade of API

  • Big OD oil Casing pipe

    Big OD oil Casing pipe

    We are the specialist of making large OD casing pipe,from 20" to30". We are the only one manufacturer in China with the capacity to produce casing pipes as large as 30".Our premium connection RT J-DTG3 is specially designed for the casing with OD above 14

  • API J55 Oil Casing pipe

    API J55 Oil Casing pipe

    Oil casing is mainly used to support the well wall during the drilling process and after the completion of the well, so as to ensure the drilling process and the normal operation of the whole well after the completion of the well. It is the lifeline to ma

  • API-N80 Oil Casing pipe

    API-N80 Oil Casing pipe

    Oil casing is the lifeline to maintain the operation of the oil well. It is mainly used for the drilling and transportation of oil and gas Wells, and for supporting the well wall during the drilling process and after the completion of the well, so as to e

Contact Us
Deutsch Espanol Francais Italiano Portugues Japanese Korean Arabic Russian
Products Catalogue

Inside Blowout Control Tools
Subs &Tool Joints
Downhole Drilling tools
Wellhead Equipment and Tools
Oil Country Tubular Goods
Fishing & Milling Tools
Drilling jars
Cementing tools and Casing accessaries
Mud pump spare parts

Contacts
Contact Form

Send Email

Skype

WhatsApp

Scan Our Wechat

LiveChatX