Isimiso Sobuchwepheshe
Ubuchwepheshe besando se-DTH kanye ne-tube drilling kuyindlela yokumba ehlanganisa inzuzo yesivinini sokubhoboza isando somoya we-DTH kanye nenzuzo yokuvikela udonga lwe-casing oluhambisana nokuzinza kodonga lwe-borehole.Uma ubhoboza, i-eccentric drill iphonswa ngaphandle lapho i-eccentric block izungeziswa phambili.Ububanzi be-eccentric drill ephonsiwe bukhulu kunobubanzi be-drill emaphakathi.Ngesikhathi sokumba, i-casing iqhutshwa isicathulo sepayipi ukuze ilandele ukuvumelanisa, futhi ipayipi yensimbi engenasici ivikela Kubaluleke kakhulu ukuzinzisa udonga lwembobo yokuhlola okuhlanganisiwe nokukhiqiza kahle ukuvimbela udonga lwembobo ukuba lungawi futhi luwa.Lapho i-eccentric drill bit ibhobolwa ekubunjweni okuphelele, ngemva kokubhola okungu-0.5 ~ 1 m, i-eccentric block ihlehliswa ngokuhlehliswa, bese i-eccentric drill ibuyiswa ku-protective wall casing, ukuze uhlelo lwe-quaternary lukwazi ukuhamba ngokushelela. .I-stratum eyinkimbinkimbi enzima futhi ephukile.
Izici zobuchwepheshe
1. Isando esingaphansi kwembobo kanye nobuchwepheshe bokumba amashubhu busebenzisa ngokugcwele izinzuzo zesando esingaphansi kwe-pneumatic ukuze siphule ngokushesha idwala, elisiza ekuthuthukisweni nasekusetshenzisweni kwemithombo ehlangene yokuhlola nokukhiqiza ku-hydrogeological. izinhlolovo.
2. Ubuchwepheshe bokubhola bokulandelela bungalandelela i-casing ngenkathi kubhola.Ayidingi amanzi nodaka lokumba, ikakhulukazi ezindaweni ezomile nezintula amanzi.Ingakwazi ukuphinda kabili umzamo ngohhafu womzamo, igweme ubunzima bokuthenga amanzi okubhola, futhi ithuthukise ukusebenza kahle komsebenzi.Ukuthuthukiswa kunenzuzo kakhulu.
3. Lolu hlobo lobuchwepheshe lokumba lusebenzisa i-synchronous follow-up casing ukuvikela udonga lapho kubhobozwa, lisebenzisa ngokugcwele izinzuzo zesando somoya we-DTH ukuze siphule ngokushesha idwala, kuyilapho kugcinwa udonga lwembobo yochungechunge lwesine lomthwalo obuthakathaka ongaphezu kwamandla. ingxenye engaphezulu yesibaya semigodi.Ama-cuttings aphukile akhishwa emgodini ngokugeleza komoya ngesivinini esikhulu, futhi umphumela wokudonsa unenzuzo ekuvuleni umzila wokuphuma kwamanzi.Ukuwashwa okuqhubekayo kodonga lwembobo ngomoya ohamba ngesivinini esikhulu kuzonciphisa isikhathi sokugeza kahle, okuwusizo ekwenzeni ngcono ukubhola kwe-hydrogeological kanye nokusebenza kahle kokuphothula kahle.
4. Isando esingaphansi kwembobo kanye nobuchwepheshe bokugaya amapayipi bufanele ukumba amatshe aqinile.Ukwakheka kobumba noma ukwakheka okufanayo okuthambile, kulula ukuvimba indawo yomoya futhi i-drill cuttings ekhishwe kulula ukulenga odongeni lwembobo ukwenza ipulaki yodaka, okunzima ukufeza ukusebenza kahle kokumba .
5. I-casing eboshwe ngesando esingaphansi ngepayipi ikhishwa ngemishini ekhethekile ngemva kokuphothula umsebenzi wokuvikela udonga, okungase kusetshenziswe kabusha phakathi nesikhathi esithile, ukunciphisa izindleko zokwakha.
Isikhathi sokuthumela: Aug-27-2021