Customization: | Available |
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After-sales Service: | Online Service |
Warranty: | 1year |
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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 |
1.We will reply to your inquiry within two hours after receiving it, and arrange a special person to contact you. Please leave WhatsApp, WeChat and other communication tools as far as possible, so as to find yourself easily. If there is no response, please send a second letter.
2.Our company has a professional technical team and professional translators (Spanish, Arabic, Russian, and English). If you need to communicate with Russian service personnel, please inform them in advance by email.
3.We will provide the most competitive price in the Chinese market according to the requirements of your bidding documents to ensure the successful completion of your bidding project, so please give us sufficient preparation time, preferably the latest bid closing date.
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