Products
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Workover Rigs
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Rig Components&Accessories
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Handling Tools
- DD Type Center Latch Elevators
- DDZ Type Center Latch Drilling Elevators
- Slip Type Air Operated Elevators
- CDZ Type Drilling Elevators
- CD Type Side Door Elevators
- SLX Type Side Door Elevators
- TA Type Center Latch Elevators
- SJX Type Single Joint Auxiliary Elevator
- SP Type Single Joint Auxiliary Elevators
- SJ Type Single Joint Auxiliary Elevator
- DDZH Hydraulic Center Latch Elevator
- CDZH Hydraulic Center Latch Elevator
- Y Series Slip Type Elevator
- Sucker Rod Elevators
- Single Arm Elevator Links For Oil Drilling
- Double Arm Elevator Links for Oil Drilling
- DB Type Manual Tongs
- Extended Casing Manual Tongs
- Workover Tongs
- B Type Manual Tongs
- C Type Manual Tongs
- SDD Type Manual Tongs
- AAX Type Manual Tongs
- WWC Type Manual Tongs
- WWB Type Manual Tongs
- SB Type Manual Tongs
- LF Type Manual Tongs
- Drill Pipe Slips
- Drill Collar Slips
- Casing Slips
- Safety Clamps
- Pneumatic Slip
- Drill Pipe Hydraulic Power Tong
- Casing Hydraulic Power Tong
- Workover Hydraulic Power Tong
- Sucker Rod Power Tong
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Drill Strings
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Tubulars
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Mud Pump & Spare Parts
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Well Control Equipments
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Production Equipments
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WellHead Equipments
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Drill Bits
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Well Cementing & Completion Tools
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Water Well Drilling Accessories
- Technical Features
- Technical Parameters
Main Technical Features
● Both square Kelly and hexagonal Kelly is available as per customers’ requirements.
● Designed & Manufactured according to API SPEC 7-1.
● 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 conform to API criterion
Kelly Size | Length | Upper Box Connection | Lower Pin Connection | I.D (mm) | Driving Section | |||||||
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mm | in | mm | Type(LH) | O.D. (mm) | Thread | O.D(mm) | Cross Flat (mm) | For Square (mm) | Cross Corner for Hex (mm) | |||
Std | Optional | Std | Optional | |||||||||
63.5 | 2-1/2 | 12.19 | 6-5/8 REG | 4-1/2 REG | 196.8 | 146 | | 85.7 | 31.8 | 63.5 | 83.3 | |
76.2 | 3 | 12.19 | 6-5/8 REG | 4-1/2 REG | 196.8 | 146 | NC26 | 104.8 | 44.4 | 76.2 | 100 | 85.7 |
88.9 | 3-1/2 | 12.19 | 6-5/8 REG | 4-1/2 REG | 196.8 | 146 | NC31 | 120.6 | 57.2 | 88.9 | 115.1 | 100.8 |
108 | 4-1/4 | 12.9 | 6-5/8 REG | 4-1/2 REG | 196.8 | 146 | NC38 | 158.8 | 71.4 | 108 | 141.3 | 122.2 |
NC38 | 161.9 | 71.4 | 108 | 141.3 | 122.2 | |||||||
133.4 | 5-1/4 | 12.9 | 6-5/8 REG | 4-1/2 REG | 196.8 | 146 | NC46 | 177.8 | 82.6 | 133.3 | 175.4 | 151.6 |
NC50 | 177.8 | 82.6 | 133.3 | 175.4 | 151.6 | |||||||
152.4 | 6 | 12.9 | 6-5/8 REG | 196.8 | 146 | 5-1/2FH | 152.4 | 173 | ||||
NC56 | 152.4 | 173 |