Oilfield API 5 1/4" Square Kelly Drill Spare Parts
API Standard Square Kelly / Hexagonal Kelly in Oilfield
Product Overview
Kelly is 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, and 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.
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.
Advantages of Square & Hexagonal Kelly
- Shipped in a protective steel -cased scabbard.
- Ends and drive section,IDs and connections machined and inspected to API specification.
- Ultrasonic inspection is performed on all section.
- 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.
Technical Data. of Our Square & Hexagonal Kelly
| Kelly size | 63.5 | 76.2 | 88.9 | 108 | 108 | 133.4 | 133.4 | ||
| 2 1/2 | 3 | 3 1/2 | 4 1/4 | 4 1/4 | 5 1/4 | 5 1/4 | |||
| Lengthdrive Section | LD Standard | 11280 | 11280 | 11280 | 11280 | 11280 | 11280 | 11280 | |
| LD optional | 15540 | 15540 | 15540 | 15540 | |||||
| Lengthoverall | L Standard | 12190 | 12190 | 12190 | 12190 | 12190 | 12190 | 12190 | |
| L optional | 16460 | 16460 | 16460 | 16460 | |||||
| Length Drive Section | DFL Across flate | 63.5 | 76.2 | 88.9 | 108 | 108 | 133.4 | 133.4 | |
| DC Across cornere | 83.3 | 100 | 115.1 | 141.3 | 141.3 | 175.4 | 175.4 | ||
| DCC Across flate | 82.55 | 98.43 | 122.7 | 139.7 | 139.7 | 171.45 | 171.45 | ||
| RC Radlue | 7.9 | 9.5 | 12.7 | 12.7 | 12.7 | 15.9 | 15.9 | ||
| RCC Radlue | 41.3 | 49.2 | 56.4 | 69.9 | 69.9 | 85.7 | 85.7 | ||
| Wall thickness eccentric bore | 11.43 | 11.43 | 11.43 | 12.07 | 12.07 | 15.88 | 15.88 | ||
| Upper box connection | Thread size and style LF | Standard | 6 5/8 REG | 6 5/8 REG | 6 5/8 REG | 6 5/8 REG | 6 5/8 REG | 6 5/8 REG | 6 5/8 REG |
| Optional | 4 1/2 REG | 4 1/2 REG | 4 1/2 REG | 4 1/2 REG | 4 1/2 REG | ||||
| OD | Du Standard | 196.9 | 196.9 | 196.9 | 196.9 | 196.9 | 196.9 | 196.9 | |
| Du Optional | 146.1 | 146.1 | 146.1 | 146.1 | 146.1 | ||||
| Bevel diameter | Lu | 406.4 | 406.4 | 406.4 | 406.4 | 406.4 | 406.4 | 406.4 | |
| DF Standard | 186.1 | 186.1 | 186.1 | 186.1 | 186.1 | 186.1 | 186.1 | ||
| DF Optional | 134.5 | 134.5 | 134.5 | 134.5 | 134.5 | ||||
| Lower pin connection | Label | NC26 | NC31 | NC38 | NC46 | NC50 | 5 1/2 FH | NC56 | |
| Outsize diameter | 85.7 | 104.8 | 120.7 | 158.8 | 161.9 | 177.8 | 177.8 | ||
| LL | 508 | 508 | 508 | 508 | 508 | 508 | 508 | ||
| DF Bevel diameter | 82.9 | 100.4 | 116.3 | 145.3 | 154 | 170.7 | 171.1 | ||
| Inside diameter | 31.8 | 44.5 | 57.2 | 71.4 | 71.4 | 82.6 | 82.6 | ||
When ordering please specify below:
- Nominal size and overall length.
- Kelly type (Square or hexagonal).
- Upper and lower connection.
Xi'an TianRui Petroleum Machinery Equipment Company Limited is a professional manufacturer of solid control equipment and other petroleum equipment in China. We are the first-class supplier of resources market of SINOPEC and CNPC. Our products include solid control equipment, cement tools, PDC drilling bits, Wellheading tools, Mud pumps and their acceossries.
They are exported to Russia, America, Middle East, South America, Southeast Asia, Central Asia , African, Australia,Europe etc. Our company is willing to cooperate and make common progress with friends at home and abroad with first-class products, first-class service and reasonable prices
Competitive Advantages
1. We offer high quality products at competitive price.
2. Shortest delivery time.
3. Flexible payment terms.
4. Timely after-sale service.
5. Most of our equipment can be replaceable with international brands.
6. Our products have been exported to Argentina, Egypt, US, Australia, Romania, Pakistan, Dubai, Abu Dhabi, Iran, India, Indonesia, Vietnam, Malaysia and many other countries.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.