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| Shenlong Petroleum Drillingtools Co.,Ltd. |
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Suppliers
Lead No. 104957 |
drill collar(API)
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| Drill collar:
Our drill collars are manufactured from 4145H modified steel.Drill collars are bored and drifted to API Spec7-1 and fully heated to meet or exceed the mechanical property requirements of API Spec7.Hardness range of 285-341HB and a charpy V notch impact value of 54joules are guaranteed one inch below the surface.
On enquiries and orders ,please specify:
Slick or spiral;
Drill collar OD;
Drill collar bore:
Length of drill collar;
Connection type;
Stress-relief grooves:
Stress-relief grooves decease the frequence of fatigue failures by improving the bending strength of pin and box connections and reducing high stress concentrations.Sress-relief features are manufactured in compliance with API Spec7,unless otherwise specified by customers.
Slip recess and elevator recess :
Shenlong offers optional elevator and slip recesses to improve handling efficiency and safety.The
upper radius of elevator recess is cold-rolled to increase product life.Slip and elevator recesses can be used together or seperately.Unless otherwise specified,slip and elevator recesses are machined in compliance with API RP7G guidline.
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| Product Name: |
drill collar
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| Model No. |
NC23-31
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| Country of Origin: |
China
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| Method of Payment: |
T/T,L/C...
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| Minimum Order: |
1
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| Time Before Shipment: |
within 20days
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| Monthly Production: |
800
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| Lead Number: |
104957
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| Company Name: |
Shenlong Petroleum Drillingtools Co.,Ltd. |
| Contact Person: |
Miss penny zhang |
| Address: |
Yugong Road of Industrial Park Jiyuan,Henan,China |
| City: |
Jiyuan,Henan,China |
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| Zip/Postal Code: |
454650 |
| Country: |
China |
| Business Phone: |
86-391-6635031 |
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| Fax: |
86-391-6635036 |
| Website 1 |
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