1/2" Forging Oilfield Hexagonal Kelly Drill Spare Parts

Brand Name:TR Solids Control
Certification:API 7-1, ISO 9001
Model Number:TRFZG
Minimum Order Quantity:1 pc
Delivery Time:15 days
Payment Terms:L/C, D/A, D/P, T/T, Western Union
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Address: No.10 West of North Second Rig, Weiyang District, Xi’an City, China
Supplier`s last login times: within 48 hours
Product Details Company Profile
Product Details

API Spec 7-1 and SY5411 Standard Hexagonal Kelly for Oilfield


Product Introduction


Kelly is located in the top of the drill string, with square and hexagonal. In rotary drilling, when it is drilling, kelly connected with square bushing and rotary bushing, transfer the ground rotary torque to drill pipe and to drive the drill bit,bearing the weight of the drill string.In the drilling of the turbine and screw, the weight of the drill string and the counter torque are supported.


Square drill kelly are made from AISI 4145H alloy bars that are quenched and tempered full length. A hardness range of 285 to 341 BHM and a minimum impact value of 54 Joules as per ASTM A 370 are maintained one inch bellow the surface at room temperature. To improve resistance to galling, all connections are phosphate-coated with an API thread compond. Each bar used to manufacture kellys has been examined with magnetic partice inspections and ultrsonic inspections.


Main Benefits of Our Square & Hexagonal Kelly

  1. Shipped in a protective steel -cased scabbard.
  2. Ultrasonic inspection is performed on all section.
  3. 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.
  4. Ends and drive section,IDs and connections machined and inspected to API specification.

Technical Specifications of Our Square & Hexagonal Kelly


Kelly size63.576.288.9108108133.4133.4
2 1/233 1/24 1/44 1/45 1/45 1/4
Lengthdrive SectionLD Standard11280112801128011280112801128011280
LD optional15540155401554015540
LengthoverallL Standard12190121901219012190121901219012190
L optional16460164601646016460
Length Drive SectionDFL Across flate63.576.288.9108108133.4133.4
DC Across cornere83.3100115.1141.3141.3175.4175.4
DCC Across flate82.5598.43122.7139.7139.7171.45171.45
RC Radlue7.99.512.712.712.715.915.9
RCC Radlue41.349.256.469.969.985.785.7
Wall thickness eccentric bore11.4311.4311.4312.0712.0715.8815.88
Upper box connectionThread size and style LFStandard6 5/8 REG6 5/8 REG6 5/8 REG6 5/8 REG6 5/8 REG6 5/8 REG6 5/8 REG
Optional4 1/2 REG4 1/2 REG4 1/2 REG4 1/2 REG4 1/2 REG
ODDu Standard196.9196.9196.9196.9196.9196.9196.9
Du Optional146.1146.1146.1146.1146.1
Bevel diameterLu406.4406.4406.4406.4406.4406.4406.4
DF Standard186.1186.1186.1186.1186.1186.1186.1
DF Optional134.5134.5134.5134.5134.5
Lower pin connectionLabelNC26NC31NC38NC46NC505 1/2 FHNC56
Outsize diameter85.7104.8120.7158.8161.9177.8177.8
LL508508508508508508508
DF Bevel diameter82.9100.4116.3145.3154170.7171.1
Inside diameter31.844.557.271.471.482.682.6


Why do I choose you?


Our company was registered in the year 2010. Before we start our own business, our team members all worked more than 8 years in some other big petroleum companies. Our members have abundant supplier channels, trading and project implementation experience. Besides, we also have our own after-sales service team. Therefore, we could provide the required equipment with superior quality and competitive price.


When ordering please specify:

  • Kelly type (Square or hexagonal).
  • Nominal size and overall length.
  • Upper and lower connection.

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.

China 1/2 Forging Oilfield Hexagonal Kelly Drill Spare Parts supplier

1/2" Forging Oilfield Hexagonal Kelly Drill Spare Parts

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