Rolling drilling bits d = 76-490 mm

Rolling drilling bits d = 76-490 mm

"Geomash" produces rolling drilling bits d=76–490 mm. Rolling drilling bit is a rock cutting instrument for сut-chipping, crushing and crushing-chipping action. Rolling drilling bits are used for drilling of water wells. The applied technology of drilling with a rolling drilling bit is rotary noncore drilling with washing or airflush. The rolling drilling bit is cooled by means of flushing liquid/air during drilling with washing/airflush, also flushing liquid participates in carrying out of destroyed ground on the surface.

Rolling drilling bit for well drilling has the following characteristics, where:
the first figure (Roman)— number of rollers
second (Arab)— diameter of a drilling bit
letters (to the sign "dash") — hardness of drilling ground: M (S), S (M), SZ (MA), T (F), TZ (FA), TKZ (FHA), K (H), OK (VH)
letter (after "dash") — types of downhole cleaning (C, G, P)
letter (last) — type of drilling bit legs (A, B, H)

Hardness of drilling ground:
M (S)— soft
S (M)— medium hardness
SZ (MA) — abrasive grounds of medium hardness
T (F) — firm grounds
TZ (FA)— abrasive firm grounds
TKZ (FHA)— firm abrasive grounds with layers of hard grounds
K (H) — hard grounds
OK (VH)— very hard grounds

Types of downhole cleaning :
C (C)- central washing
G (J)- side washing/ jet flushing
P (A)- airflushing

Type of drilling bit legs:
A- two and more journal bearings
B- rolling-contact bearings
H- one journal bearing (others- rolling-contact bearings)

Geomash offers qualitative rolling drilling bits of various diameters and designs at low prices. You can order or buy a rolling drilling bit having called in sales department of JSC Geomash-center, detailed information in the section "Contact us".