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Kelly drilling

Kelly drilling belongs to the most common dry rotary drilling methods and is used for the production of bored piles with a large diameter (from a size of approx. 500 mm). The process is suitable for nearly all types of soil and rock. The soil is conveyed with relatively short rotary drilling tools, such as augers, core barrels, buckets and special drilling tools. A typical element of this drilling method is the drill rod, the so-called Kelly bar, which is telescopic and facilitates large drilling depths.

Procedure with uncased Kelly drilling:

1. Installing the protective pile

2. Emptying, e.g. with an auger

3. Inserting the reinforcement

4. Concreting

5. Finished pile

Video Kelly drilling

The video shows Liebherr drilling rigs in different Kelly drilling applications.

Cased Kelly drilling

When the soil is insufficiently solid or in case of groundwater ingress boreholes must be produced using a casing.

Uncased Kelly drilling

Solid, dry building ground allows borehole installation without a casing.

Change of drilling tools

For diverse soil conditions augers, core barrels, buckets and special drilling tools are used.

Short leader

For drilling work with restricted headroom special short leaders are available.

Casing oscillator

When the torque of the rotary drive is insufficient, hydraulic casing oscillators are applied.

Removal of drill cuttings

Alternate rotating and shaking of the auger on the surface removes the loosened soil from the auger.

Insertion of reinforcement cage

After the borehole has been produced the reinforcement cage is lifted into the borehole using the auxiliary winch of the drilling rig.

Concreting of the pile

Immediately after the reinforcement cage has been inserted the borehole is filled with concrete.

01/08

Machines

Results 1-6 of 12

  • Operating weight - 52.8 t

  • Max. torque - 200 kNm

  • Kelly drilling, max. drilling depth - 34.5 m

  • Kelly drilling, max. drilling diameter - 1,500 mm

  • Operating weight - 69.3 - 79.9 t

  • Max. torque - 252 kNm

  • Kelly drilling, max. drilling depth - 53.2 m

  • Kelly drilling, max. drilling diameter - 3,300 mm

  • Operating weight - 71.1 - 82.1 t

  • Max. torque - 252 kNm

  • Kelly drilling, max. drilling depth - 53.2 m

  • Kelly drilling, max. drilling diameter - 3,300 mm

  • Operating weight - 73.6 - 84.6 t

  • Max. torque - 297 kNm

  • Kelly drilling, max. drilling depth - 70.8 m

  • Kelly drilling, max. drilling diameter - 3,400 mm

  • Operating weight - 75.5 - 85.5 t

  • Max. torque - 297 kNm

  • Kelly drilling, max. drilling depth - 70.8 m

  • Kelly drilling, max. drilling diameter - 3,400 mm

  • Operating weight - 99.0 - 111.1 t

  • Max. torque - 347 kNm

  • Kelly drilling, max. drilling depth - 77.5 m

  • Kelly drilling, max. drilling diameter - 4,100 mm

Kelly drilling with an LB 45

Foundation piles for the new Neckartal bridge at Heilbronn (GE).

Job report

Kelly drilling with LB 36

The 130 year old bridge needs to be renovated.

Video

LB 20 with BAT 230 rotary drive

Expansion of the Federseeklinik in Bad Buchau (GE).

Job report

LB 16 unplugged

New roundabout with two bridges over the motorway.

Job report

LB 24 with rock drilling augers and buckets

A luxury resort is being built at the bay of Kotor in Montenegro.

Job report

Cased Kelly drilling with rock drilling auger

Further berths for cruise ships ath the Port of Split.

Job report
01/06

Tools for professionals

  • Augers, drilling buckets, core barrels, casing drivers, casings, cutting shoes, etc.
  • Wear parts (chisels, teeth, blocks)
Kelly drilling tools

It was close!

Spectacular performance of LB 36

LB 45 Animation

Get in touch

If you have any further questions, please contact our local sales or service team.

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