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 |
|
≤0.03 |
≤0.03 |
|
≤0.2 |
|
|||
|
Other Elements：N≤0.015，Ni≤0.5 |
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Mechanical Property:
|
Mechanical Property |
||||||||
|
Outside Diameter Range |
Yield Strength |
Tensile Strength |
ElongationA% |
HB |
Charpy impactAkv J |
|||
|
mm |
in |
MPa |
Psi |
MPa |
Psi |
|||
|
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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