| After-sales Service: | Online Support |
|---|---|
| Warranty: | Online Support |
| Manufacturing Process: | Forging |
| Surface Treatment: | Spray-Paint |
| Operation Pressure: | Hand Operation |
| Material: | Alloy |
| Samples: |
|---|
| Customization: |
|---|
Suppliers with verified business licenses
Audited Supplier
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 formulated process can ensure that the misalignment of the hole reaches the standard wall thickness. Kelly bars are manufactured according to API-7-1 Spec.
The Main Technical Specification of Kelly ( Square& Hexagonal )
| Norminal Size | Length(ft) | Top Upset Joint | Bottom Upset Joint | Bore D | Drive Section | |||
| (in) | API BOX | Du | Right Hand Connections | DL | Across | Across | ||
| Thread Left Hand | Corners | Flates | ||||||
| 2003/1/2 | 40 | 6 5/8REG | 7 3/4 | NC38(3 1/2IF) | 4 3/4 | 2 1/4 | 4.437 | 3 1/2 |
| 2004/1/4 | 40 | 6 5/8REG | 7 3/4 | NC46 (41F) | 6~6 3/8 | 2 13/16 | 5.5 | 4 1/4 |
| NC50(4 1/2IF) | 6 1/8~6 3/8 | |||||||
| 2005/1/4 | 40 | 6 5/8REG | 7 3/4 | NC50 | 7 | 3 1/4 | 6.75 | 5 1/4 |
| 5 1/2FH | ||||||||
| 6 | 40 | 6 5/8REG | 7 3/4 | NC50 | 7 3/4 | 3 1/2 | 7.625 | 6 |
Lake Petro company is a professional supplier of various oilfield drilling rig equipment, including oil drilling and service equipment,oil production equipment,OCTG ,wellhead & downhole tools and spare parts with API certification.
Advanced equipment and techniques
Long-term cooperative relationships with more than a hundred famous and large manufacturers in China
High quality products and the best services to meet the strict needs of our customers
The business philosophy of "people-oriented, customer first and reliability first"
Successfully exported to Europe, America, the Middle East, South Africa and Southeast Asia.
Lake Petro company is a professional supplier of various oilfield equipment, including oil drilling and service equipment,oil production equipment,OCTG ,wellhead & downhole tools and spare parts with API certification. Following the principle of "quality first, science and technology innovated, people oriented", every Lake Petro person is sparing no effort to provide the customers with best products and services. Through efforts of Lake Petro staff, our products have already been exported to USA, South America, Africa, Middle East, Russia and some other countries (regions). With super quality, reasonable price and professional service, Lake Petro company has become VIP (assigned) supplier and built strategic partnership with some coutries' national petroleum companies.
How to order?
Please send us your inquiry with detail item description or with Model number.
If there is no packing demand we take it as our regular exported standard packing.
We will offer you an order form for filling. We will recommend you the most suitable model according to information you offered.
You send us your detail requirement, we provide quotation to you.
Can I expect a quality products?
All the production and processing are strictly according to ISO 9001:2008 and API standard. At the same time, mature production technology ensuring the quality satisfy international request. We also welcome the third party inspection, such as BV, SGS and TUV.
The information you may like to know before Payment:
1. Methods of Payment:
T/T (Telegraphic Transfer) or L/C at sight
2. Shipping way
Sample order: we suggest Courier express like DHL/UPS/TNT/FEDEX or by air
Bulk order: we suggest by air or by sea.
3. Quality Control
We have our own experienced QC.
There will be strict inspection and testing for every order before shipping out.
Suppliers with verified business licenses
Audited Supplier 
){kind=link}
){kind=link}