Usually Interlocking Kelly bar is applied to strong hard rock formation. It adopts six-ribs and several sets drive pressure key welded onto their surface. Also inner keyboards are made from high-tensile steel under special heat treatment.

Application

Bauer / Soilmec/ Casagrande/ Liebherr/ IMT / Mait / Sany /XCMG/ Sunward/ Zoomlion/ TEG or modified small drilling rig.

Materials &Technology

1st-2nd pipe Materials: 27SiMn or 35CrMo undergone quenched-tempered heat treatment.

3rd-5th pipe Materials: Q345B undergone quenched-tempered heat treatment.

Kelly drive stub Materials: Soid forging with HRC305-335 and tensile strength 1050 Mpa.

External pressure key: 35CrMoTi.

Kelly spring Materials:60Si2Mn.

KR Drilling Manufactory Info:

KR Drilling machinery is one of the leading manufactory in China dedicated to providing high quality Kelly bars for piling rigs.  The interlocking and Friction Kelly bar we supplied ranges from Outer diameter 299mm to 630mm, from 3 section to 6 sections, For internationally renowed brands of drilling rig including Bauer Bauer / Soilmec/ Casagrande/ Liebherr/ IMT / Mait / Sany /XCMG/ Sunward/ Zoomlion/ TEG....

1. Kelly bar ( Interlocking Kelly bar/Friction Kelly bar/Customized Kelly bar/Square Kelly bar...)

2. Drilling tools (Drilling Buckets/Drilling Auger/Core barrel/Drilling bits/Rollers...)

3. Casing Parts (Casing Pipe/Casing Driver/Casing Connector/Casing Shoe/Teeth/Bolts...)

4. Hydraulic Parts (Gearbox/Motor/Pump, Small hydraulic parts...)

5. Electric parts & Valve group

6. Piling rig Structure parts ( Kelly guide/ Swivel joint/ Rotary sleeve /Terminal joint / Spring/ Slew bearing/Ropes...)

7. Undercarriage parts (Track rollers/Guide roller..)

All in one words, One-Stop service for Drilling rig.