- Chemical Auxiliary Agent[2]
- Diesel Generators[1]
- Loaders[3]
- Engines[2]
- Other Machine Tools Accessories[1]
- Winches[2]
- Drilling Rig[8]
- Other Mining Machinery[3]
- Mining Machinery Parts[10]
- Other Machinery[1]
- Used Mining Machinery[2]
- Other Measuring & Analysing Instruments[1]
- Pressure Gauges[2]
- Pipe Fittings[5]
- Pumps[8]
- Valves[7]
- Steel Pipes[8]
- Steel Wire[3]
- Other Wire Mesh[1]
- Steel Wire Mesh[1]
- Rubber Hoses[4]
- Drill Bit[4]
- Contact Person : Ms. Qi Jane
- Company Name : Goldenman Petroleum Equipment Co., Limited
- Tel : 0086-546-8058559
- Fax : 0086-546-8058669
- Address : Shandong,Dongying,7/F,Wanda international Mansions,67 Fuqian street,
- Country/Region : China
- Zip : 257091
square kelly drill pipe
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Square Kelly drill pipe
Product description:Kelly is the drive part of whole drill stem, it has two types, square kelly and hexagonal kelly and all of them are manufactured comfort to API Spec7-1 and SY/T6509-2000 criterion.
Our 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 comform to API criterion.
The Main Technical Specification of Kelly ( Square& Hexagonal )
Norminal Size (in) | Length(ft) | Top Upset Joint | Bottom Upset Joint | Bore D | Drive Section | |||
API BOX Thread Left Hand | Du | Right Hand Connections | DL | Across Corners | Across Flates | |||
3-1/2 | 40 | 6 5/8REG | 7 3/4 | NC38(3 1/2IF) | 4 3/4 | 2 1/4 | 4.437 | 3 1/2 |
4-1/4 | 40 | 6 5/8REG | 7 3/4 | NC46 (41F) NC50(4 1/2IF) | 6~6 3/8 6 1/8~6 3/8 | 2 13/16 | 5.500 | 4 1/4 |
5-1/4 | 40 | 6 5/8REG | 7 3/4 | NC50 5 1/2FH | 7 | 3 1/4 | 6.750 | 5 1/4 |
6 | 40 | 6 5/8REG | 7 3/4 | NC50 | 7 3/4 | 3 1/2 | 7.625 | 6 |
We are responsible for customers, strictly implement the standard specifications, and provide high-quality products and service. Sincerely hope to establish good trade relationship with all friends at home and abroad.
square kelly drill pipe
