.

Hexagonal Kelly

Kelly is located in the top of the drill string, with square and hexagonal.In rotary drilling, when it is drilling, kelly connected with square bushing and rotary bushing, transferthe ground rotary torque to Heavy Weight Drill Pipeand to drive the drill bit,bearingthe weight of the drill string.In the drilling of the turbine and screw, the weight of the drill string and the counter torque are supported.

We are a square Kelly manufacturerin China, our company has 2 sucker rod workshops, 3 production lines. We guarantee on-time delivery, No middleman!

Square Kelly Specification:

Specification

Drive part length

Overall length

Drive part

Upper internal threaded joint

Lower external threaded joint

Inner diameter

StandardLD

SelectionLD

Standard

Selection

Square sizeDFL

Across cornerDC

Across cornerDCC

RadiusRC

RadiusRCC

Eccentric hole minimum wall thickness

Screw thread specification and left rotate type

Outside diameter

Chamfering diameter

Thread specification and type

Outside diameterDLR

LengthLL

Chamfering diameterDF

Standard

Selection

Standard

Selection DU

length LU

Standard DF

Selection DF

(2½)

11280

12190

(65/8)REG

(4½)REG

NC26(23/8IF)

508

3

11280

12190

100

(65/8)REG

(4½)REG

NC31(27/8IF)

508

(3½)

11280

12190

(65/8)REG

(4½)REG

NC38(3½IF)

508

108

(4¼)

11280

15540

12190

16460

108

(65/8)REG

(4½)REG

NC46(4IF)

508

108

(4¼)

11280

15540

12190

16460

108

(65/8)REG

(4½)REG

NC50(4½IF)

508

154

(5¼)

11280

15540

12190

16460

(65/8)REG

5½FH

508

(5¼)

11280

15540

12190

16460

(65/8)REG

NC56

508

Hexagonal Kelly Specification mm(in):

Specification

Drive part lengthти длины

Overall length

Drive part

Upper internal threaded joint

Lower external threaded joint

Inner diameter

StandardLD

SelectionLD

Standard

Selection

Square sizeDFL

Across cornerDC

Across cornerDCC

RadiusRC

RadiusRCC

Eccentric hole minimum wall thickness

Screw thread specification and left rotate type

Outside diameter

Chamfering diameter

Thread specification and type

Outside diameterDLR

LengthLL

Chamfering diameterDF

Standard

Selection

Standard DC

Selection DU

length LU

Standard DF

Selection DF

(2½)

11280

12190

(65/8)REG

(4½)REG

NC26(23/8IF)

508

3

11280

12190

100

50

(65/8)REG

(4½)REG

NC31(27/8IF)

508

(3½)

11280

15540

12190

16460

108

(65/8)REG

(4½)REG

NC38(3½IF)

508

108

(4¼)

11280

15540

12190

16460

75

(65/8)REG

-

-

-

NC46(4IF)

508

108

(4¼)

11280

15540

12190

16460

75

(65/8)REG

-

-

-

NC50(4½IF)

508

154

(5¼)

11280

15540

12190

16460

173

(65/8)REG

-

-

-

5½FH

508

(5¼)

11280

15540

12190

16460

173

(65/8)REG

-

-

-

NC56

508

Steel Mark

Chemical Composition%

C

Si

Mn

P

S

Cr

Mo

Cu

Al

4145H

  1. ~0.48
  2. ~0.35
  3. ~1.20

≤0.03

≤0.03

  1. ~1.20
  2. ~0.25

≤0.2

  1. ~0.045

Other Elements:N≤0.015,Ni≤0.5

Mechanical Property:

Mechanical Property

Outside Diameter Range

Yield Strength

Tensile Strength

ElongationA%

HB

Charpy impactAkv J

mm

in

MPa

Psi

MPa

Psi

  1. ~171.4

3-1/8~6-3/4

≥758

≥110000

≥965

≥140000

≥13

285~341

≥54

7

≥689

≥100000

≥930

≥135000

≥13

285~341

≥54

Under special conditions, the impact work of the charpy can be determined as greater than 70J according to the supply and demand



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