Kev taw qhia luv luv ntawm PDC cutters

 

Niaj hnub no PDC laum khoom tsim raws li lub matrix muaj me ntsis zoo ib yam li ntawm ob peb xyoos dhau los. Lub zog tensile thiab kev cuam tshuam tsis kam tau nce los ntawm tsawg kawg 33%, thiab cov cutter brazes lub zog tau nce los ntawm ≈80%. Nyob rau tib lub sijhawm, geometries thiab thev naus laus zis ntawm kev txhawb nqa cov qauv tau txhim kho, ua rau cov khoom lag luam matrix muaj zog thiab muaj txiaj ntsig zoo.
Cutters Khoom
PDC Cutters yog tsim los ntawm carbide substrate thiab pob zeb diamond grit. Lub siab kub ntawm ib ncig ntawm 2800 degrees thiab siab siab ntawm kwv yees li 1,000,000 psi ua cov compact. Ib tug cobalt alloy kuj ua raws li ib tug catalyst rau sintering txheej txheem. Cov cobalt pab khi cov carbide thiab pob zeb diamond.
Tus naj npawb ntawm Cutters
Peb feem ntau siv cov cutters tsawg dua ntawm cov khoom muag PDC raws li txhua tus txiav tshem tawm qhov tob dua ntawm kev txiav. Rau cov formations nyuaj, nws yog ib qho tseem ceeb uas yuav tau siv ntau cutters los them rau qhov me me qhov tob ntawm kev txiav.

 

PDC Laum khoom - Cutters Loj
Rau softer formations, peb feem ntau xaiv cutters loj dua nyob rau hauv nyuaj formations. Feem ntau, tus qauv ntau qhov ntau thiab tsawg yog los ntawm 8 hli mus rau 19 hli rau txhua tus me ntsis.

 

 

Peb feem ntau piav qhia txog kev tsim cov khoom siv khib nyiab los ntawm kev rov qab rake thiab sab rake cov ces kaum.
● Lub cutter rov qab rake yog lub kaum sab xis nthuav tawm los ntawm lub ntsej muag ntawm lub cutter rau kev tsim thiab ntsuas los ntawm ntsug. Rov qab rake kaum sib txawv ntawm, feem ntau, 15 ° txog 45 °. Lawv tsis tas mus li ntawm me ntsis, los yog los ntawm me ntsis rau me ntsis. Qhov loj ntawm lub cutter rake lub kaum sab xis rau PDC laum khoom cuam tshuam rau Penetration Rate (ROP) thiab cutter tsis kam hnav. Raws li lub rake lub kaum sab xis nce, ROP txo qis, tab sis qhov kev tiv thaiv kev hnav nce ntxiv raws li cov ntaub ntawv thov tam sim no kis mus rau thaj tsam loj dua. PDC cutters nrog me me rov qab rakes siv qhov tob tob ntawm kev txiav thiab yog li ntawd muaj kev txhoj puab heev, tsim kom muaj zog Torque, thiab yuav ua rau kom ceev hnav thiab muaj kev pheej hmoo ntau dua ntawm kev puas tsuaj.

 

 

● Lub cutter sab rake yog qhov sib npaug ntawm kev taw qhia ntawm lub cutter los ntawm sab laug mus rau sab xis. Sab rake ces kaum feem ntau me me. Lub sab rake lub kaum sab xis pab lub qhov ntxuav los ntawm mechanically directing cuttings mus rau lub annulus.