Kutheni kufuneka sisebenzise i-casing centralizer?

Ukusetyenziswa kwe-casing centralizer yindlela ebalulekileyo yokuphucula umgangatho wokufaka isamente.

Injongo yokufaka isamente iphindwe kabini: okokuqala, ukuvala iindawo zemithombo ezinokuthi zidilike, zivuza, okanye ezinye iimeko ezinzima nge-casing, ukuze kuqinisekiswe ukuqhubeka kokugrumba okukhuselekileyo nokugudileyo. Okwesibini kukuvala ngokufanelekileyo ukwakheka kweoyile negesi, ukuze kuthintelwe ukuba ioyile negesi zingaphumi emhlabeni okanye ziphume phakathi kokwakheka, kunye nokubonelela ngomjelo wokuvelisa ioyile negesi.

Ngokwenjongo yokufaka isamente, iindlela zokuvavanya umgangatho wokufaka isamente zinokufunyanwa. Oko kubizwa ngokuba ngumgangatho olungileyo wokufaka isamente kuthetha ukuba i-casing iphakathi kwi-borehole kwaye iringi yesamente ejikeleze i-casing iyahlula ngokufanelekileyo i-casing eludongeni lomthombo kunye nokwakheka kwi-formation. Nangona kunjalo, i-borehole eyombiweyo ayimi nkqo ngokupheleleyo, kwaye i-well slant iya kuveliswa ngamanqanaba ahlukeneyo. Ngenxa yokubakho kwe-well inclination, i-casing ayiyi kuba phakathi ngokwemvelo kwi-borehole, nto leyo ebangela ukuba kubekho ubude obahlukeneyo kunye namanqanaba ahlukeneyo okunamathela eludongeni lomthombo. Ukwakheka kwe-casing kunye ne-wend wall gap phakathi kobukhulu obahlukeneyo, xa i-samente paste edlula kwi-gap inkulu, udaka lokuqala kulula ukulutshintsha udaka; ngokuchaseneyo, i-gap incinci, ngenxa yokuba ulwelo luyaxhathisa, i-samente paste inkulu, ukwakheka kwe-slurry slurry trenching phenomenon eyaziwayo. Emva kokwenziwa kwe-trenching phenomenon, ayinakuyivala ngempumelelo i-oyile kunye negesi, ioyile kunye negesi ziya kuhamba kwiindawo ngaphandle kwe-samente ring.

Ukusetyenziswa kwe-casing centralizers ukwenza i-casing ibe phakathi kangangoko kunokwenzeka ngexesha lokufaka i-samente. Kwimithombo ekhokelayo okanye imigodi etyekele kakhulu, kubaluleke ngakumbi ukusebenzisa i-casing centralizer. Ukongeza ekuthinteleni ngempumelelo ukutyibilika kwesamente ekuphumeni kwi-groove, ukusetyenziswa kwe-casing corrector kunciphisa umngcipheko wokuba i-casing ibambeke ngenxa yoxinzelelo oluhlukeneyo. Ngenxa yokuba i-casing iphakathi, i-casing ayizukuba kufutshane nodonga lomthombo, kwaye nakwicandelo lomthombo elinokungena kakuhle, i-casing ayizukubambeka lula yi-dag cake eyenziwe luxinzelelo oluhlukeneyo, oluya kukhokelela ekubholeni okubambekileyo. I-casing centralizer inokunciphisa nomlinganiselo wokugoba kwe-casing equleni (ingakumbi kwicandelo elikhulu le-borehole), okuya kunciphisa ukuguguleka kwezixhobo zokubhola okanye ezinye izixhobo ezingaphantsi kwi-casing ngexesha lenkqubo yokubhola emva kokuba i-casing ihlisiwe, kwaye idlale indima ekukhuseleni i-casing. Ngenxa yesixhobo esiphakathi sekhava esisetyenziswa sisixhobo esiphakathi sekhava, indawo yoqhagamshelwano phakathi kwekhava nodonga lomthombo iyancitshiswa, nto leyo enciphisa ukungqubana phakathi kwekhava nodonga lomthombo, kwaye ilungele ukuthotywa kwekhava ingene emthonjeni, kwaye ilungele ukushukuma kwekhava xa kuqiniswa umthonjeni.

Ngamafutshane, ukusebenzisa i-casing centralizer yindlela elula, elula nebalulekileyo yokuphucula umgangatho wokufaka isamente.