IADC Tricone Bit Classification Codes System

IADC Tricone Bit Classification Codes System

O le IADC roller cone drilling bit siata fa'avasegaina e masani ona fa'aoga e filifili ai le pito sili mo se fa'aoga patino. O nei siata o lo'o i ai fasipepa o lo'o maua mai i kamupani ta'uta'ua e to'afa o pa'u. Ua fa'avasegaina fa'ailoga e tusa ai ma le International Association of Drilling Contractors (IADC) code. O le tulaga o vaega taitasi i totonu o le siata o loʻo faʻamatalaina i numera e tolu ma le tasi tagata. O le faasologa o mataitusi numera e faʻamatalaina ai le "Series, Type and Features" o le bit. O le uiga fa'aopoopo e fa'amatalaina ai fa'ailoga fa'aopoopo.

IADC CODE REFERENCE

Numera Muamua:

1, 2 and 3 designate Steel Tooth Bits, with 1 for soft, 2 for medium and 3 for hard formations.

4, 5, 6, 7 and 8 designate Tungsten Carbide Insert Bits for varying formation hardness with 4 being the softest and 8 the hardest.

Numera Lua:

1, 2, 3 and 4 help further breakdown the formation with1 being the softest and 4 the hardest.Numera Tolu:

O lenei numera o le a fa'avasegaina le pusi e tusa ai ma le fa'amomoli/fa'amaufa'ailoga ma le fa'ailoga fa'apitoa e puipuia ai le ofuina e fa'apea:

1.Standard matala matala ili uila

2. Tulaga matala matala bit mo na'o le ea viliina

3.Standard matala avanoa bit ma le fua puipuiga lea ua faauigaina o

fa'apipi'i carbide i le mulivae o le cone.

4.Roller fa'amaufa'ailoga fa'amau fa'amau

5.Roller fa'amaufa'ailoga fa'amau fa'apipi'i fa'apipi'i carbide i le mulivae o le cone.

6. Journal fa'amaufa'ailoga fa'amau fa'amau

7. Fa'amaufa'ailoga fa'amau fa'amau fa'amau fa'amau fa'apipi'i carbide i le mulivae o le cone.

Numera Fa/Mata'i Fa'aopoopo:

O fa'ailoga mataitusi nei o lo'o fa'aogaina i le fa'ailoga numera fa'ailoga e fa'ailoa ai fa'aopoopoga fa'aopoopo:

A -- Talosaga ea

B -- Fa'amaufa'ailoga Fa'apitoa Fa'amau

C -- Avatu Tutotonu

D -- Puleaina o se'ese'esega

E -- Vaevae Fa'atele

G -- Puipuiga fua fa'aopoopo

H -- Fa'aoga Fa'asagaga

J -- Jet Deflection

L -- Fa'a'au'au

M -- Talosaga afi

R -- Uila fa'amalosia

S -- Usu Nifo Fa'ata'atia

T -- Lua Piko Koni

W -- Fa'aleleia le Fa'atulagaina o le tipi

X -- Fa'aofi Fa'amau

Y -- Mea Fa'aofi Conical

Z -- Isi fa'aofi fa'atusa

O faaupuga “malulu” “agaogao” ma le “malosi” o se faavasegaga lautele o vaega eleele o lo'o fa'aulufaleina. I se tulaga lautele, o ituaiga papa i totonu o vaega taitasi e mafai ona faamatalaina e faapea:

O mea vaivai o omea e le'i tuufaatasia ma oneone.

O nei mea e mafai ona viliina i se WOB maualalo (i le va o le 3000-5000 lbs/in of bit diameter) ma le RPM maualuga (125-250 RPM).

E tatau ona fa'aoga le tele o tafega e fa'amama lelei ai le pu talu ai o le ROP e fa'amoemoe e maualuga.

O le tele o tafega e mafai ona mafua ai le fufuluina (sia'i le fufuluina o paipa vili). Ole fua ole tafe ole 500-800 gpm e fautuaina.

E pei o ituaiga uma, o le poto masani faʻapitonuʻu e tele sona sao i le filifilia o taʻaloga faʻaogaina.

E mafai ona aofia ai ma'a, gypsum, lime shaley, oneone ma ma'a. 

E masani lava o le WOB maualalo e lava (3000-6000 lbs/in o le sima lautele).

E mafai ona fa'aoga le saosaoa maualuga i shales ae e mana'omia e le penisina se fua fa'agesegese (100-150 RPM).

E mafai fo'i ona viliina ma'a oneone vaivai i totonu o nei ta'iala.

E toe fautuaina foi le maualuga o le tafega mo le faamamaina o pu

E mafai ona aofia ai ma'a limestone, anhydrite, ma'a ma'a'a ma'a quartic streaks ma dolomite.

O maa ia e maualuga le malosi o le fa'amalosi ma o lo'o i ai mea fa'afefe.

E ono mana'omia le maualuga o le WOB (fa'ata'ita'iga i le va o le 6000-10000 lbs/in o le sima lautele.

I se tulaga lautele, e fa'aaogaina le saosaoa fa'agesegese (40-100 RPM) e fesoasoani ai i le oloina/tu'imomomoina.

E sili ona lelei le viliina o mea fa'apipi'i po'o ni taimane e fa'aaoga ai le RPM maualuga ae itiiti le WOB. Ole fua ole tafe e masani lava e le taua tele i ia fa'atulagaga.