Izinhlobo ezahlukene ze-PDC cutters

Ukumba kuwumsebenzi obalulekile embonini kawoyela negesi. Izingcezu ze-PDC (ezibizwa nangokuthi i-Polycrystalline Diamond Compact bit) zivame ukusetshenziswa enqubweni yokumba. Ibhithi ye-PDC iwuhlobo lwebhithi equkethe izisiki eziningi ze-Polycrystalline Diamond (PCD) ezinamathiselwe emzimbeni omncane futhi zisika emadwaleni ngokugunda isenzo phakathi kwabasiki kanye nedwala.

I-PDC cutter iyingxenye ebaluleke kakhulu ye-drill bit, futhi ihhashi lomsebenzi lokumba. Izinhlobo ezahlukene ze-PDC cutter zihloselwe ukuhlangabezana nezimo zokusebenza ezihlukene. Ukukhetha ukuma okulungile kubaluleke kakhulu, okungathuthukisa ukusebenza kahle kwakho futhi kunciphise izindleko zokumba.

Ngokuvamile, sihlukanisa i-PDC cutter ngezansi:

1． PDC flat cutters

2． Izinkinobho ze-PDC

Izisiki eziyisicaba ze-PDC zisetshenziselwa kakhulu ukumba izingcezu ezimayini nasezindaweni zokumba uwoyela. Ingasetshenziswa futhi ku-diamond core bit kanye ne-PDC eveza.

Izinzuzo Eziyinhloko zabasiki be-PDC:

• Ukuminyana okuphezulu (i-porosity ephansi)

• I-homogeneity ephezulu yokuqamba nesakhiwo

• Ukuguga okuphezulu kanye nokumelana nomthelela

• Ukuzinza okuphezulu kokushisa

• Ukusebenza okuhle kakhulu kukonke okutholakala emakethe

I-PDC flat cutter ububanzi isukela ku-8 kuye ku-19mm ::

Ukucaciswa okungenhla okwabasebenzisi abangakhetha kukho. Ngesikhathi esifanayo, ukucaciswa okuhlukene kwemikhiqizo kungakhiqizwa futhi kusetshenzwe ngokuvumelana nezidingo zabasebenzisi.

Njengomthetho ojwayelekile, abasiki abakhulu (19mm kuya ku-25mm) banolaka kunabasiki abancane. Kodwa-ke, bangase bakhulise ukushintshashintsha kwe-torque.

Abasiki abancane (8mm, 10mm, 13mm kanye no-16mm) baboniswe bebhola ngezinga eliphezulu lokungena (ROP) kunabasiki abakhulu kwezinye izinhlelo zokusebenza. Esinye sezicelo ezinjalo yi-limestone njengesibonelo. Amabhithi aklanywe ngabasiki abancane kodwa amaningi awo angakwazi ukumelana nokulayishwa komthelela ophezulu.

Ukwengeza, abasiki abancane bakhiqiza ama-cuttings amancane kuyilapho abasiki abakhulu bekhiqiza ama-cuttings amakhulu. Ukusikwa okukhulu kungase kubangele izinkinga ngokuhlanza imbobo uma uketshezi lokubhoboza lungakwazi ukuthwala izingcezu ziye phezulu.

I-PDC ephethe

I-PDC bearing isetshenziswa njenge-antifriction bearing ye-downhole motor, esetshenziswa kakhulu ezinkampanini zesevisi yasezindaweni zikawoyela kanye nezimboni zezimoto ezihamba phansi. Ukuzala kwe-PDC kunezinhlobo ezahlukene okuhlanganisa i-PDC radial bear, i-PDC thrust bear.

Amabhodi e-PDC amelana kakhulu nokugqoka. Uma kuqhathaniswa ne-tungsten carbide yendabuko noma amanye ama-hard alloy bearings, impilo ye-diamond bearings iphindwe izikhathi ezingu-4 kuya kwezingu-10 ubude, futhi ingasebenza emazingeni okushisa aphezulu (okwamanje izinga lokushisa eliphakeme lingu-233 ° C). Isistimu yokuthwala i-PDC ingakwazi ukumunca umthwalo oweqile isikhathi eside, futhi ukulahlekelwa ukungqubuzana okuphansi embuthanweni wokuthwala kwandisa amandla omshini adlulisiwe.

Izinkinobho ze-PDC zisetshenziselwa ikakhulukazi i-DTH drill bit, i-cone bit, kanye nokukhetha kwedayimane.

Amakhethi edayimane asetshenziswa kakhulu emishinini yezimayini, efana nezigubhu eziqhubekayo zabavukuzi, izigubhu ze-Longwall shearer, imishini ebhokayo yomhubhe (isisekelo somshini wesihlangu, i-rotary drilling rig, umhubhe, izigubhu zomshini wokudonsa amanzi, njalo njalo)

Izinkinobho ze-PDC ikakhulukazi zihlanganisa:

(1) Izinkinobho ezibunjiwe ze-PDC: ikakhulukazi ezisetshenziselwa i-DTH drill bit.

(2) Izinkinobho ze-PDC zekhonikhi: ikakhulukazi ezisetshenziselwa ibhithi yekhoni.

(3) Izinkinobho ze-PDC parabolic: ikakhulukazi ezisetshenziselwa ukusika okuwusizo.

Uma kuqhathaniswa nezinkinobho ze-tungsten carbide, izinkinobho ze-PDC zingathuthukisa ukumelana ne-abrasive izikhathi ezingaphezu kwezingu-10.

Izinkinobho ze-PDC ezinezinkinobho

I-PDC conical cutters

Izinkinobho ze-PDC parabolic

Ngaphandle kosayizi abajwayelekile, singakwazi futhi ukukhiqiza ngomdwebo wakho ngamunye.

Siyakwamukela ukuthola izisiki ze-zzbetter PDC, ukusebenza okuhle kakhulu, ikhwalithi engashintshi, kanye nevelu evelele.