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Hole stabilization methods

Once the hole is made and cuttings are cleared from the drill bit face, these cuttings must be completely removed from the hole and the walls of the hole stabilized. Drilling cannot continue until the hole is clean and open. The following table summarizes hole stabilization methods for different drilling methods.

Holes may be stabilized by:
using casing (C)
hydrostatic pressure (H)
a wallbuilding process (W) or
using the drill rods (R) (when the rods are close to hole size).

Drilling method

Hole stabilization method

Auger drilling (continuous flight)



R


Auger drilling (bucket)


H


W

Auger drilling (short flight)





Cable-tool drilling

C



W

Core drilling (conventional)

C

H

R

W

Core drilling (wireline core)

C

H

R

W

Jetting

C

H


W

Push probing



R


Rotary air (RAB)

C




Rotary air Air core drilling



R


Rotary air Dual tube reverse circulation (RC) rotary air drilling



R


Rotary air Dual tube reverse circulation (RC) hammer drilling



R


Rotary mud drilling

C

H


W

Rotary mud Single tube reverse circulation (RC) rotary mud drilling


H


W

Sonic drilling



R


Vibracoring



R


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Contact: Mr. Peter Chan

Phone: +86 851 8577 3056

Email:sales@rotarypercussivedrill.com

Add:No. 128, Changling South Road, Guanshanhu District, Guiyang City, Guizhou Province, China.