Oilfield R3 Length Rotary 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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Verified Supplier
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

Oil and Gas Rotary Kelly Drill String Square or Hexagonal Type


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. Straightness of the kelly is very crucial in the manufacturing process, thus straightness inspections are carried out before, during and after each machining operation. All milling processes are performed on specially designed rigid Kelly mills to ensure tight tolerances and high quality drive sections.


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.


Main Characteristics of Our Square & Hexagonal Kelly

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


Package & Shipment
Package: Seaworthy package (or as customer require)
MOQ: 1 Pieces
Delivery: 30 days (can be short if we have stock)
Payment: 30%T/T in advanced+70% balanced;irrevocable L/C at sight.
Remarks All-risk insurance and accept the third party test.
Port :Tianjin/Qingdao/Shanghai.

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 Oilfield R3 Length Rotary Kelly Drill Spare Parts supplier

Oilfield R3 Length Rotary Kelly Drill Spare Parts

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