Kev kho deg ntawm downhole lub cev muaj zog - qhov kev daws teeb meem zoo rau corrosion hauv saturated brine

1. Ua tiav qhov teeb meem corrosion nyob rau hauv saturated brine.

Txheej txheem kev sib piv:

ib. Chromium plating yog txoj kev siv dav tshaj plaws tam sim no. 90% ntawm cov neeg siv roj av hauv tsev siv cov qauv no, uas muaj lub neej luv luv thiab tus nqi qis. Qhov teeb meem loj tshaj plaws ntawm electroplating yog ib puag ncig muaj kuab paug, thiab electroplating tsis tuaj yeem ua haujlwm hauv saturated brine.

b. Txau WC, cov neeg siv khoom yeej xav tau WC txheej ntawm cov cuab yeej drilling, ntxiv rau qhov muaj zog hnav tsis kam, nws kuj tseem tiv taus hydrogen sulfide, dej ntsev thiab lwm yam corrosion. Qhov tsis zoo yog tus nqi siab, thiab qhov zoo dua yog lub neej ua haujlwm ntev. Cov cuab yeej drilling tau siv rau ntau tshaj 600 teev thiab tseem zoo li qub, thiab tuaj yeem siv tau ib txwm nyob rau hauv saturated brine.

2. Txheej Technology daws teeb meem saturated ntsev dej Corrosion

ib. Txheej thev naus laus zis (tsuas yog qhia txog kev daws teeb meem zoo rau cov teeb meem corrosion hauv dej ntsev saturated)

Slurry twj muaj qhov tseem ceeb helical thaj chaw hu ua "lobes" nrog 4, 5 lossis 7 lobes nyob rau sab saum toj hu ua crests (los yog crests). Cov crests tsim "lub ntsiab txoj kab uas hla". Qhov loj me me txawv ntawm 4.0 mus rau 6.5 ntiv tes, uas dhau los ua qhov loj ntawm lub cev muaj zog.

Qhov qis tshaj yog hu ua trough (los yog trough), thiab lub trough forms "tsawg kawg". Qhov kev ncua deb ntawm lobe mus rau trough yog li ¼-nti (6.35mm). Muaj cov kev cai nruj heev rau "wave top" nyob rau hauv nruab nrab ntawm lub cev muaj zog thiab "dhia" ntawm ob kawg. Raws li tus qauv, tus nqi "runout" yuav tsum tsawg dua 0.010 "(0.254 mm). Txhua yam ntxiv thiab lub twj tso kua mis roj hmab hose yuav raug puas tsuaj sai sai thaum lub cev muaj zog tig thaum lub sijhawm ua haujlwm.

kev npaj nto

ib. Rau cov tshuaj tsuag txheej, grit blasting tsis tas yuav tsum tau. Qhov saum npoo yuav tsum tau ntxuav nrog cov cuab yeej siv tes thaum tsim nyog lossis degreasing yog xav tau. Cov tshuaj tsuag tseem tuaj yeem siv los ua ib qho thaub qab, thaum nws yog qhov tsim nyog yuav tsum ceev nrooj ntxuav qhov chaw los yog kho cov tshuaj tsuag ib nrab.