Drill String Performance: Precision Milled Rotary Kelly Flats, API Compliant

Price Negotiable
Price: Negotiable
MOQ: 1
Delivery Time: 1 Months
Brand: xi'an rig
Product Description

Oil Drilling Equipment with precision milled Rotary Kelly flats meeting API specifications for and consistent drill string performance

Transmission System of Oil Drilling Equipment

 

The transmission system performs the functions of power transfer, distribution, and speed regulation, delivering the prime power from the power units with precision to the drawworks, rotary table, mud pumps, top drive, and other working equipment, achieving power matching and adaptation to operating conditions.

It mainly comprises couplings, gearboxes, drive shafts, chain transmission mechanisms, hydraulic transmission modules, and variable-frequency transmission modules. Mechanically driven rigs use chains, gears, and gearboxes as the core to achieve staged transfer of mechanical power; electrically driven variable-frequency rigs rely mainly on electrical transmission, realizing stepless speed regulation through frequency control, with smoother power transfer, higher speed-regulation accuracy, and lower failure rates, precisely matching different drilling load requirements.

When ordering please specify:of Oil Drilling Equipment

  • Kelly type (square or hexagonal);
  • nominal size and overall length;
  • Upper and lower connections.
Nom Size (in) Standard O.D.(in) Bottom Connection‑Hex. O.D.(in) I.D.(in) Drive Section(in)
  Standard O.D.(in) Optional O.D.(in) Square O.D.(in) Hex. O.D.(in) Square Hex. A B
2 1/2 6 5/8 REG LH 7 3/4 4 1/2 REG LH 5 3/4 NC26 3 3/8     1 1/4 3 1/4  
3 6 5/8 REG LH 7 3/4 4 1/2 REG LH 5 3/4 NC31 4 1/8 NC26 3 3/8 1 3/4 1 1/4 3 3/8 3 3/8
3 1/2 6 5/8 REG LH 7 3/4 4 1/2 REG LH 5 3/4 NC38 4 3/4 NC31 4 1/8 2 1/4 1 3/4 4 7/16 3 15/16
4 1/4 6 5/8 REG LH 7 3/4 4 1/2 REG LH 5 3/4 NC46 6 1/4 NC38 4 3/4 2 13/16 2 1/4 5 1/2 4 25/32
4 1/4 6 5/8 REG LH 7 3/4 4 1/2 REG LH 5 3/4 NC50 6 3/8 NC38 4 3/4 2 13/16 2 1/4 5 1/2 4 25/32
5 1/4 6 5/8 REG LH 7 3/4   5 1/2 FH 7 NC46 6 1/4 3 1/4 3 6 3/4 5 29/32
5 1/4 6 5/8 REG LH 7 3/4   NC56 7 NC50 6 3/8 3 1/4 3 1/4 6 3/4 5 29/32
6 6 5/8 REG LH 7 3/4     5 1/2 FH 7   3 1/2   6 13/16
6 6 5/8 REG LH 7 3/4     NC56 7   3 1/2   6 13/16

Get in Touch

Have questions about our products or want to discuss a custom order? Our team is ready to help you.

Company Xi'an Rig Oilfield Equipment Co., Ltd.
Location 18th/F,Unit5, Eurasia Weiyang District, Xi' an, China 710016
Contact Person Jack yang

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