Kungani sidinga ukusebenzisa i-casing centralizer?

Ukusetshenziswa kwe-casing centralizer kuyisinyathelo esibalulekile sokuthuthukisa izinga likasimende.

Inhloso yokufaka usimende ikabili: okokuqala, ukuvala izigaba zemithombo ezijwayele ukuwa, ukuvuza, noma ezinye izimo eziyinkimbinkimbi nge-casing, ukuze kuhlinzekwe isiqinisekiso sokuqhubeka nokubhola okuphephile nokushelelayo.Okwesibili ukuvala ngokuphumelelayo ukwakheka okuhlukile kukawoyela negesi, ukuze kuvinjwe uwoyela negesi ekuphunyukeni phansi noma ekuphunyukeni phakathi kokwakheka, nokuhlinzeka ngomgudu wokukhiqiza uwoyela negesi.

Ngokwenhloso yokufaka usimende, izindlela zokuhlola izinga likasimende zingatholakala.Okubizwa ngekhwalithi enhle ye-cementing ngokuyinhloko kusho ukuthi i-casing igxile emgodini we-borehole futhi indandatho ye-cement ezungeze i-casing ihlukanisa ngokuphumelelayo i-casing kusuka odongeni lomthombo kanye nokwakheka kusuka ekubunjweni.Kodwa-ke, imbobo yangempela embiweyo ayimile ngokuphelele, futhi ukutsheka kuzokwenziwa ngamazinga ahlukahlukene.Ngenxa yokuba khona kokuthambekela komthombo, i-casing ngeke igxile ngokwemvelo emgodini we-borehole, okuholela esimweni sobude obuhlukene kanye namazinga ahlukene okunamathela odongeni lomthombo.Ukwakheka kwe-casing kanye negebe lodonga lomthombo phakathi kobukhulu obuhlukile, lapho unamathisela usimende ngegebe likhulu, udaka lwangempela lulula esikhundleni sodaka;kunalokho, igebe lincane, ngenxa yokumelana nokugeleza kwe-liquid kukhudlwana, ukunamathisela kukasimende kunzima ukufaka esikhundleni sodaka lwangempela, ukwakheka komkhuba owaziwa kakhulu we-slurry slurry trenching.Ngemva kokwakhiwa komkhuba we-trenching, awukwazi ukuvala ngokuphumelelayo ungqimba lukawoyela negesi, uwoyela negesi kuzogeleza ezingxenyeni ngaphandle kwendandatho kasimende.

Ukusetshenziswa kwe-casing centralizeris ukwenza i-casing igxile kakhulu ngangokunokwenzeka ngesikhathi sikasimende.Ukuze uthole imithombo eqondisayo noma imithombo enokuthambekela okukhulu, kuyadingeka kakhulu ukusebenzisa i-casing centralizer.Ngokungeziwe ekuvimbeleni ngempumelelo udaka lukasimende ukuthi lungaphumi emgodini, ukusetshenziswa kwe-casing corrector nakho kunciphisa ingozi yokuthi i-casing ibambeke ngenxa yokucindezela okuhlukile.Ngenxa yokuthi i-casing igxilile, i-casing ngeke isondele odongeni lomthombo, futhi ngisho nasesigabeni somthombo esinokungena kahle, i-casing ngeke ibanjwe kalula yikhekhe lodaka elakhiwe ukucindezela okuhlukile, okuzoholela ekubhobozeni okunamathelayo. .I-centralizer ye-casing inganciphisa izinga lokugoba kwe-casing emgodini (ikakhulukazi engxenyeni enkulu ye-borehole), okuzonciphisa ukuguga nokudabuka kwamathuluzi okubhoboza noma amanye amathuluzi okukhipha i-downhole ku-casing ngesikhathi senqubo yokubhoboza ngemva kokuba i-casing yehlisiwe, futhi ubambe iqhaza ekuvikeleni i-casing.Ngenxa ye-centralizer ye-casing ngedivayisi ye-casing centralizer, indawo yokuxhumana phakathi kwe-casing nodonga lomthombo iyancishiswa, okunciphisa ukungqubuzana phakathi kwe-casing nodonga lomthombo, futhi kuhambisana nokwehliswa kwe-casing emthonjeni. , futhi ihambisana nokunyakaza kwe-casing lapho unamathisela umthombo.

Ukufingqa, ukusetshenziswa kwe-casing centralizer kuyisinyathelo esilula, esilula nesibalulekile sokuthuthukisa izinga likasimende.