I-IADC Tricone Bit Classification Systems System

I-IADC Tricone Bit Classification Systems System

I-IADC roller cone drilling bit classification charts ngokuvamile isetshenziselwa ukukhetha ibhithi engcono kakhulu yohlelo oluthile. Lawa mashadi aqukethe izingcezu ezitholakala kubakhiqizi abane abaphambili bamabhithi. Izingcezu zihlukaniswa ngokwekhodi ye-International Association of Drilling Contractors (IADC). Indawo yebhithi ngayinye eshadini ichazwa izinombolo ezintathu nohlamvu olulodwa. Ukulandelana kwezinhlamvu zezinombolo kuchaza “Uchungechunge, Uhlobo nezici” zebhithi. Uhlamvu olwengeziwe luchaza izici zomklamo ezengeziwe.

I-IADC CODE REFEREENCE

Idijithi Yokuqala:

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.

Idijithi Yesibili:

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

Le dijithi izohlukanisa ibhithi ngokuya ngohlobo lwe-bearing/seal kanye nokuvikela okukhethekile kwegeji yokugqokwa ngale ndlela elandelayo:

1.Standard open bearing roller bit

2.I-bearing bit ejwayelekile yokubhoboza umoya kuphela

3.Standard open bearing bit with gauge protection echazwa ngokuthi

i-carbide ifaka esithendeni se-cone.

4.I-roller evalwe nge-bearing bit

5.I-roller evaliwe ene-bearing bit ene-carbide efaka esithendeni sekhoni.

6.I-Journal evaliwe enebhithi

7.I-Journal evaliwe i-bearing bit enokufakwa kwe-carbide esithendeni sekhoni.

Idijithi Yesine/Incwadi Eyengeziwe:

Amakhodi ezinhlamvu alandelayo asetshenziswa endaweni yedijithi yesine ukukhombisa izici ezengeziwe:

A -- Isicelo somoya

B -- Special Bearing Seal

C -- Centre Jet

D -- Ukulawula ukuchezuka

E -- Amajethi Anwetshiwe

G -- Ukuvikelwa kwegeji eyengeziwe

H -- Isicelo Esivundlile

J -- Ukuphambuka kweJet

L -- Amaphedi we-Lug

M -- Isicelo Motor

R -- Ama-weld aqinisiwe

S -- Ibhithi yezinyo elijwayelekile

T -- Amabhithi Amakhoni Amabili

W -- Isakhiwo Esithuthukisiwe sokusika

X -- Ishizi Faka

Y -- I-Conical Insert

Z -- Okunye ukufaka umumo

Amagama okwakhiwa “okuthambile” “okumaphakathi” kanye “nokuqina” ayizigaba ezibanzi kakhulu ze-geological strata esingenwayo. Ngokuvamile, izinhlobo zamadwala ngaphakathi kwesigaba ngasinye zingachazwa kanje:

Ukwakheka okuthambile kuwubumba olungahlanganisiwe nezihlabathi.

Lezi zingabholwa nge-WOB ephansi ngokuqhathaniswa (phakathi kuka-3000-5000 lbs/in of bit diameter) kanye ne-RPM ephezulu (125-250 RPM).

Amazinga okugeleza amakhulu kufanele asetshenziselwe ukuhlanza imbobo ngokuphumelelayo njengoba i-ROP kulindeleke ukuthi ibe phezulu.

Amazinga okugeleza ngokweqile nokho angabangela ukugezwa (hlola ukugezwa kwamapayipi okubhoboza). Izinga lokugeleza lika-500-800 gpm liyanconywa.

Njengazo zonke izinhlobo zamabhithi, ulwazi lwasendaweni ludlala indima enkulu ekunqumeni amapharamitha okusebenza.

Ukwakheka okumaphakathi kungase kuhlanganise ama-shales, i-gypsum, i-shaley lime, isihlabathi kanye ne-siltstone. 

Ngokuvamile i-WOB ephansi yanele (3000-6000 lbs/in of bit diameter).

Isivinini esiphezulu sokujikeleza singasetshenziswa kuma-shale kodwa ushoki udinga izinga eliphansi (100-150 RPM).

Amatshe esanti athambile angaphinde abhojwe ngaphakathi kwale mingcele.

Nakulokhu, amazinga okugeleza aphezulu ayanconywa ekuhlanzeni imigodi

Ukwakheka okuqinile kungase kuhlanganise i-limestone, i-anhydrite, i-sandstone eqinile ene-quartic streaks kanye ne-dolomite.

Lawa amatshe anamandla acindezelayo aphezulu futhi aqukethe izinto ezilumayo.

I-WOB ephezulu ingase idingeke (isb. phakathi kuka-6000-10000 lbs/in kobubanzi bebhithi.

Ngokuvamile isivinini sokujikeleza esinensayo sisetshenziswa (40-100 RPM) ukusiza isenzo sokugaya/ sokuchoboza.

Izendlalelo eziqinile kakhulu ze-quartzite noma i-chert zibhojwa kangcono ngokufaka noma izingcezu zedayimane kusetshenziswa i-RPM ephakeme kanye ne-WOB encane. Amazinga okugeleza ngokuvamile awabalulekile ekwakhekeni okunjalo.