Kutheni le nto kufuneka sisebenzise i-casing centralizer?

Ukusetyenziswa kwe-casing centralizer ngumlinganiselo obalulekileyo wokuphucula umgangatho we-cementing.

Injongo ye-cementing iphindwe kabini: okokuqala, ukutywina amacandelo equla athambekele ekuweni, ukuvuza, okanye ezinye iimeko ezinzima kunye ne-casing, ukwenzela ukubonelela ngesiqinisekiso sokuqhubekeka kokumbiwa okukhuselekileyo nokugudileyo. Okwesibini kukutywina ngokufanelekileyo iifom ezahlukeneyo zeoli kunye negesi, ukwenzela ukuba kuthintelwe ioli kunye negesi ukuba ingaphumi emhlabeni okanye ibaleke phakathi kweefom, kunye nokubonelela ngomjelo wokuveliswa kweoli kunye negesi.

Ngokwenjongo ye-cementing, imilinganiselo yokuvavanya umgangatho we-cementing inokufumaneka. Okubizwa ngokuba ngumgangatho olungileyo we-cementing ikakhulu kuthetha ukuba i-casing igxile kwi-borehole kwaye ikhonkco yesamente ejikeleze i-casing iyahlula ngokufanelekileyo i-casing ukusuka eludongeni lomthombo kunye nokubunjwa kokubunjwa. Nangona kunjalo, iqula eligrunjiweyo alikho nkqo ncam, kwaye ukutyibilika komthombo kuya kwenziwa ngokwemigangatho eyahlukeneyo. Ngenxa yobukho bokuthambekela kakuhle, i-casing ayiyi kugxilwa ngokwemvelo kwi-borehole, okubangela ukuba kwenzeke into yobude obuhlukeneyo kunye namazinga ahlukeneyo okunamathela eludongeni lomthombo. Ukuqulunqwa kwe-casing kunye nomsantsa eludongeni phakathi kobukhulu obuhlukeneyo, xa i-sement paste ngokusebenzisa i-gap inkulu, udaka lwasekuqaleni lulula ukubuyisela udaka; ngokuchaseneyo, umsantsa umncinci, ngenxa yokumelana nokuhamba kolwelo mkhulu, intlama yesamente kunzima ukubuyisela udaka lokuqala, ukwakheka kwento eqhelekileyo eyaziwa ngokuba yi-slurry slurry trenching phenomenon. Emva kokuqulunqwa kwe-trenching phenomenon, ayikwazi ukuvala ngokufanelekileyo i-oyile kunye negesi, i-oyile kunye negesi iya kuhamba kwiindawo ngaphandle kwesamente.

Ukusetyenziswa kwe-casing centralizeris ukwenza i-casing igxile kangangoko kunokwenzeka ngexesha lesamente. Kwiqula eliqondisayo okanye amaqula anokuthambekela okukhulu, kuyimfuneko ngakumbi ukusebenzisa i-casing centralizer. Ukongeza ekukhuseleni ngokufanelekileyo i-sement slurry ekuphumeni kwi-groove, ukusetyenziswa kwe-casing corrector kunciphisa umngcipheko wokuba i-casing ibanjwe ngoxinzelelo oluhlukeneyo. Ngenxa yokuba i-casing igxininisekile, i-casing ayiyi kusondela eludongeni lomthombo, kwaye nakwicandelo lequla elinokungena kakuhle, i-casing ayiyi kubanjiswa lula yikhekhe lodaka elenziwe luxinzelelo olwahlukileyo, oluya kukhokelela ekubambeni. . I-casing centralizer inokunciphisa iqondo lokugoba i-casing equleni (ngokukodwa kwicandelo elikhulu le-borehole), eliya kunciphisa ukuguga kunye nokukrazula kwezixhobo zokugaya okanye ezinye izixhobo zokulahla kwi-casing ngexesha lenkqubo yokugaya emva kokuba i-casing iyancipha, kwaye udlale indima ekukhuseleni i-casing. Ngenxa ye-centralizer ye-casing ngesixhobo se-casing centralizer, indawo yoqhagamshelwano phakathi kwe-casing kunye nodonga lomthombo iyancitshiswa, okunciphisa ukungqubuzana phakathi kwe-casing kunye nodonga lomthombo, kwaye kubangele ukuthotywa kwe-casing kwiqula. , kwaye ihambelana nokuhamba kwe-casing xa uqinisa iqula.

Ukushwankathela, ukusetyenziswa kwe-casing centralizer yindlela elula, elula kwaye ebalulekileyo yokuphucula umgangatho we-cementing.