Square Drive Kelly Bushing

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Petrorio Drilling Tools

Petrorio Drilling Tools manufactures premium Square Drive Kelly Bushings, built for compatibility with 17.1/2”, 20.1/2”, 27.1/2”, and 37.1/2” Square Drive Master Bushings. Designed to handle Square or Hex Kelly sizes ranging from 3” to 6”, square drive kelly bushings are built for heavy-duty drilling operations, performing reliably under high-torque conditions in both offshore and onshore environments. Equivalent to NOV, Petrorio Square Drive Kelly Bushings combine durability, precision, and operational efficiency.

The Square Drive Kelly Bushings are available in three sizes to fit different Master Bushings:

  • 27 SDHD: Suitable for 27.1/2” and 37.1/2” Master Bushings
  • 20 SDHD: Suitable for 20.1/2” Master Bushing
  • 17 SDHD: Suitable for 17.1/2” Master Bushing

Built from high-quality alloy steel, each bushing undergoes stringent manufacturing and testing processes to ensure optimal strength, wear resistance, and longevity. Square Drive Kelly Bushings are built to withstand the most demanding drilling conditions, minimizing downtime while maintaining safe and efficient operations.

Petrorio Drilling Tools’ Square Drive Kelly Bushings are a reliable solution for precision handling of drill strings, providing operators with consistent performance, safety, and peace of mind during critical drilling operations.

Square Drive Kelly Bushing

Part No.

Kelly Size/Type

SDHD Roller Assembly Complete ABI P/N Identical VARCO P/N
3" Hex 2701-S 2101 3667
3.1/2" Hex 2702-S 2102 2102
4.1/4" Hex 2703-S 2103 3669
5.1/4" Hex 2704-S 2104 3672
6" Hex 2705-S 2105 3673
3" Sq. 2706-S 2106 3660
3.1/2" Sq. 2711-S 2110 3661
4.1/4" Sq. 2707-S 2107 3662
5.1/4" Sq. 2708-S 2108 3665
6" Sq. 2709-S 2109 3666

Part List

S. No.

Description

Qty. Per Unit

SDHD

1

Kelly Bushing Body less roller assembly 01 No. 2710-S

2

Hold down bolt 04 No.

2411

3

Hold down bolt lock screw 04 No. 2711-A

4

Nut for hold down bolt 04 No. 2712

5

Lock washer for nut 04 No. 2713

6

Drive pin with washer 04 No.

-

7

Wrench 01 No. 2715

8

Wiper assembly 01 No. 2716

9

Wiper Retainer Plate 01 No. 2716-B

10

Wiper Retainer Plate Screw 08 No. 2716-C
11 Roller Pin 04 No. 2717
12 Roller Bearing 04 No. 2718

13

Sleeve Bush 04 No. 2719

14

Thrust Washer 08 No. 2720

15

Lifting Sling (Four Hooks Type) 01 No. 2721