PDC lossis PCD DRILL BIT?YUAV UA LI CAS?
PDC laum me ntsis txhais tau tias Polycrystalline Pob Zeb Diamond Cutter core ntsis
Cov qhov dej ntxov tshaj plaws yog cov dej qhov dej, qhov tob tob khawb los ntawm txhais tes hauv cov cheeb tsam uas lub rooj dej tuaj txog ntawm qhov chaw, feem ntau yog cov masonry lossis ntoo phab ntsa hauv ob sab phlu.
PDC yog tsim los ntawm kev sib txuas ib co txheej ntawm polycrystalline pob zeb diamond (PCD) nrog ib txheej ntawm cemented carbide liner ntawm qhov kub thiab txias.
PDCs yog cov nruj tshaj plaws ntawm tag nrho cov khoom siv pob zeb diamond.
PCD tsuas yog txhais tau tias Polycrystalline Pob Zeb Diamond: PCD feem ntau yog tsim los ntawm sintering ntau micro-loj ib pob zeb diamond muaju ntawm qhov kub thiab txias.PCD muaj qhov zoo ntawm cov pob txha toughness thiab zoo thermal stability, thiab yog siv los ua geological laum khoom.
PDC muaj qhov zoo ntawm pob zeb diamond lub siab hnav tsis kam nrog carbide zoo toughness.
Peb muab PDC laum khoom ua nrog ntau yam zoo li tus cutters lossis polycrystalline pob zeb diamond compacts (PDC) brazed ntawm lub cev.
PDC Cutters yog tsim los ntawm carbide substrate thiab pob zeb diamond grit.Kev kub siab ntawm ib ncig ntawm 2800 degrees thiab siab siab ntawm kwv yees li 1,000,000 psi ua rau lub compact.Ib qho cobalt alloy kuj tseem muaj thiab ua raws li cov txheej txheem sintering.Cov cobalt pab khi cov carbide thiab pob zeb diamond.
Raws li txoj cai dav dav, cutters loj (19mm txog 25mm) yog nruj dua li cov cutters me.Txawm li cas los xij, lawv tuaj yeem ua rau muaj kev hloov pauv torque.
Cov cutters me me (8mm, 10mm, 13mm thiab 16mm) tau pom tias laum ntawm ROP siab dua li cov cutters loj hauv qee yam kev siv.Ib daim ntawv thov no yog limestone piv txwv.
Tsis tas li ntawd, cov txiav me me tsim cov txiav me me thaum cov cutters loj tsim cov txiav loj.Kev txiav loj tuaj yeem ua rau muaj teeb meem nrog kev tu lub qhov yog tias cov dej drilling tsis tuaj yeem nqa cov txiav.
(1) los yog (2) Mos thiab mos nplaum-Highly drillable formations xws li av nplaum, marl, gumbo thiab unconsolidated sands.
(3) Soft-medium-Low compressive zog xuab zeb, shale thiab anhydrites nrog nyuaj txheej intermixed.
(4) Nruab Nrab-Moderate compressive zog xuab zeb, chalk, anhydrite thiab shale.
(6) Nruab nrab nyuaj-siab zog compressive nrog tsis-los yog semi-ntse xuab zeb, shale, txiv qaub thiab anhydrite.
(7) Hard-High compressive zog nrog ntse txheej ntawm xuab zeb los yog siltstone.
(8) Cov tawv tawv heev-Dense thiab ntse tsim xws li quartzite thiab volcanic pob zeb.
PDC CUTTING Structure
Mos (1) mus rau nruab nrab (4) tsim hom pdc khoom muaj ib qho loj loj ntawm PDC cutter.PDC txiav qauv yog qhia raws li hauv qab no:
2 - qhov no me ntsis muaj feem ntau 19mm cutters
3 - qhov no me ntsis muaj feem ntau 13 mm cutters
4 - qhov no me ntsis muaj feem ntau 8 mm cutters
PDC cov khoom
Post lub sij hawm: Aug-31-2022