Ekuvuthayo kwegesi yemvelo, ukukhethwa phakathi kwesando esiphansi (i-DTH) kanye ne-roller cone kancane incike ngokuyinhloko kuncike ku-lithology yokwakha, indlela yokumba, ukusebenza kwezindleko **, kanye nezinhloso zokusebenza **. Ngezansi kuqhathaniswa lezi ezimbili nezicelo zazo ezijwayelekile:

1. DOW-The-Hole Hammer (DTH) 

Umgomo Wokusebenza:  

  Sebenzisa igesi ephezulu kakhulu (umoya / nitrogen) ukushayela i-piston ethinta i-drill bit, ephula idwala ngokuhlanganiswa kwe - ** umthelela wokujikeleza **.  

Izinzuzo:  

Ukusebenza kahle okuphezulu e-Hard Rock: Isivinini sokumba okusheshayo ku-Hard, Brittleformformformformformation efana ne-granite ne-basalt (izikhathi 2-3 ngokushesha okukhulu kune-roller cone bits).  

Ukulimala kwama-reservoir okuphansi: Ukujikeleza kwegesi kunciphisa ukuhlasela okuwuketshezi (okulungele ingcindezi ephansi noma ama-reservors aqinile).  

  Ukuguquguquka okuqondayo: Isebenza kahle emithonjeni emile emile noma imithombo eqondile.  

Okubi:  

Ukuncika kwegesi: kudinga ama-compressors amoyeni noma ama-generator we-nitrogen, izindleko ezandayo.  

 Ukulinganiselwa kokujula: Okuhle kakhulu ekujuleni kwemithombo ejulile (

  Engafanele ukwakheka okuthambile: ithambekele ekubholeni kancane e-shale noma edaka.  

Isicelo Ejwayelekile:  

 Ukushayela igesi engajulile kugesi noma igesi ye-shale (e.g., umoya, ukumba kwegwebu).  

  Ukuhlola imithombo noma ukumba komhlaba edwaleni elinzima (e.g., izingqimba zamatshe, idwala le-Igceve).  

 Izifunda ezivimbela amanzi: Akukho ukusakazwa okuwuketshezi okudingekayo.  

2. I-roller cone kancane

Umgomo Wokusebenza:  

  Izigaxa ezijikelezayo zichoboze futhi zigunda idwala nge-rolling kanye nokucindezelwa.  

Izinzuzo:  

  Okuhlukahlukene  

  Ukuvumelana okujulile: Kulungele imithombo ejulile (> amamitha angama-3,000) kanye nezindawo eziphakeme zokushisa / eziphakeme (high-presure (hthp).  

amamitha angama-3,000) kanye nezindawo eziphakeme zokushisa / eziphakeme (high-presure (hthp).  

  Okubizayo: izindleko eziphansi ezingezansi, ubuchwepheshe obuvuthiwe, kanye nokuhlanganiswa okulula (e.g., ukumba odakeni).  

Okubi:  

  Ukusebenza kahle okuphansi e-Hard Rock: Ukugqoka okusheshayo ekwakhiweni kanzima kakhulu, kudinga ukushintshwa njalo.  

  Ingozi yokulimazeka ye-Reservoir: Ukujikeleza kwe-MUD kungagoqa ama-pores (kudinga uketshezi lokushayela olungiselelwe).  

  Izinselelo Zokuqondisa: Ukulawulwa okungaqondile okuqondile emithonjeni evundlile kuqhathaniswa ne-PDC bits noma i-DTH.  

Izicelo ezejwayelekile:  

  Imithombo evamile yegesi emile mpo: Ukushayela okujikelezayo ekwakhekeni okunzima okuphakathi (SAPNTONE, Mudstone).  

  Izindawo zokugcina zegesi ezijulile: zibhangqiwe ngodaka oluningi oluningi ukuze lulinganise ingcindezi yokwakhiwa.  

  Ukwakheka okuyinkimbinkimbi: izindawo ezihlanganisiwe noma ezikhubazekile (ukuqina okuthuthukisiwe nge-Tooth Design).  

3. Amanothi angeziwe

Ama-PDC Bits: Ekuvuthweni kwegesi yemvelo, ama-bits we-polycrystalline diamond compact (PDC) asetshenziswa kabanzi, ikakhulukazi emithonjeni ye-shale evundlile, enikeza ukumelana okuphakeme okuphezulu nokuqhubeka nokusika.  

Ukusetshenziswa kwe-Hybrid: Amabhithi ahlukene angasetshenziswa ezigabeni, e.g.:  

  I-DTH yezingqimba ezinzima zangaphandle, ukushintshela ku-roller cone bits ezimpahleni ezithambile.  

   Amabhithi we-PDC ezigabeni ezivundlile, ama-roller cone izingcezu ezingxenyeni eziqonde mpo.  

IHammer ye-DTH: Kubekelwe phambili i-Hard Rock, ukushayela igesi, ama-reservoirs amangalisayo / aphansi, agcizelela isivinini nokuvikelwa kwedamu.  

I-Roller Cone Bit: Ilungele kangcono ukumba okujwayelekile ngodaka, imithombo ejulile, ukwakheka okunzima okuphakathi nendawo, izindleko zokulinganisa nokuvumelana nezimo.