API 7-1 5-1/4′′ Square or Hexagonal Kelly for Oilfield Drilling
UPET GROUP CO., LTD.- Manufacturing Process：Forging
- Surface Treatment：Galvanized
- Operation Pressure：Atmospheric Pressure
- Material：Cast Steel
- Warranty：1 Year
- Application：Oilfield
Base Info
- Model NO.：5-1,4′′
- Colour：Customer Requirement
- Transport Package：Container
- Specification：3′′, 3 1,2′′, 4′′, 4 1,2′′, 5′′
- Trademark：UPET
- Origin：China
- HS Code：73061900
- Production Capacity：200000 PCS,Year
Description
Kelly is the main driver of the whole drill string.It transmits torsional energy from the rotary table through the drill string to the bit at the bottom of the hole. Kelly is a long square or hexagonal.precision machined heavy steel bar that is supported by the swivel through the rotary table and is connected to the first joint of drill pipe in the drill string.
Straightness of the kelly is very crucial in the manufacturing process, thus straightness inspection are carried out before, during and after each machining operation. The flats are precision-milled to API specification.All milling processes are performed on specially designed rigid kelly mills to ensure tight tolerances and high quality drive section.Each kelly is furnished with a pressed steel thread protectors.
Features and Benefits
Manufactured from AISI4145H-modified, fully heat-treated alloy steel with a Brinell hardness range of 285-341BHN and a minimum average Charpy impact value of 40ft-Ibs;
Ends and drive section,IDs and connections machined and inspected to API specification;
Ultrasonic inspection is performed on all section;
Shipped in a protective steel -cased scabbard;
When ordering please specify:
Kelly type (Square or hexagonal)
Nominal size and overall length
Upper and lower connection
Technical specification and parameters
Detailed Photos 
Company Information
UPET OILFIELD EQUIPMENTS CO.,LTD is one of the most well-known suppliers for the oilfield equipments in China, was established in 2000, and now has grown up to a star company which is not big but very strong in this field with our persistant effort step by step in the past years.Our products refer to the whole areas of oilfields, from a very small spare part to a very big complete rig system. Our main products are: pump spare parts, mud pumps&packages, DC/AC Motors, solid control equipments, power units, truck-mounted rigs, workover rigs, land rigs, drilling pipes and drilling tools etc. All of our products are manufactured according to the API Standard, and we are authorized to use API monogram.
Our products have been exported to 15 countries& areas around the world, 80% of our exsisting customers have done the business with us by more than 5 times, no one-off customer. We will continue to expand our range, and win more customers' trust with our better and better performance.
We welcome the win-win cooperation relationship with the partners from any places in the world, each customer is our god and helper. Warmly welcome you to come to China and visit us!
With us, you will save money, time, trouble, and most important point is that you can sleep better.