I-Cement Retainer Plug In Oil & Gas Well Guide

Amathuluzi enkonzo anamandla asetshenziswe embonini kawoyela negesi iminyaka engaphezu kwengu-50 ukwenza imisebenzi ehlukahlukene yokulungisa. I-Inflatablekahle packers,amapulaki ebhuloho, kanye ne-cement retainer isetshenziswa emigodini evulekile, emigodini ene-cased, slotted casing liners, kanye nezikrini ze-gravel-pack emithonjeni kawoyela negesi, kodwa kufanele zisetshenziswe kuphela lapho amathuluzi avamile engafaneleki. Ama-Cement Retainers asetshenziswa kakhuluImisebenzi yokulungisa usimende. Lezi zigcini ezishayekayo zisethwe ngokuvikelekile kunoma iyiphiuhlobo lwe-casing.

Amathuluzi ane-inflatable awusizo ikakhulukazi emigodini evulekile yobukhulu obungaqinisekile. Njengamapaki ajwayelekile (hlola futhiPermanent Packers) namapulaki ebhuloho, okokusebenza kwesevisi okuphephethekayo kungenziwa kunoma yiluphi uchungechunge (okungukuthi,iphekhi ebuyiselekayo, isipakishi esisethezeka kabusha, ipulaki yebhuloho elibuyisekayo, nesigcini sikasimende), okuvumela imisebenzi efanayo ukuba yenziwe njengamathuluzi avamile.

Isigcini sikasimende esine-inflatable Ukuhlanganisa umhlangano we-flapper-valve nebhuloho eliphefumulayo unomphela kudala into yokugcina usimende. Izibambi zikasimende zivame ukusetshenziselwa ukuminyanisa ukukhiqizwa okungafunwa noma amashaneli egesi phakathi kwembobo evulekile kanye nebhokisi. Ipulaki yenkunzi engezansi iyasuswa futhi kufakwe isihlalo sebhola sokugunda. I-lift sub (I-Drilling Subs) phezulu kufakwa esikhundleni se-valve.

Isigcini sikasimende esivuthekayo sivumela usimende ukuthi aphonswe eziteshini. Uma usimende ususendaweni, i-ingcindezi ye-hydrostaticukhululeka ngokukhipha isigcini. Uma isiphumile ku-retainer, i-valve iyavala futhi ayikuvumeli ukuminya okwengeziwe.

Izicelo Zokugcina Usimende Emithonjeni Yamafutha Negesi

Ezungezayo Cindezela

Ukuminya okujikelezayo kuvame ukwenziwa ngesigcini sikasimende esikhundleni sepaki. Ukujikeleza kufinyelelwa ngamanzi noma i-asidi njengoketshezi lokuqala. Isikhawu sisakazwa ngoketshezi lokuwasha ukuze kuqinisekiswe ukuhlanzeka okuhle, bese kuthi udaka lukasimende luphonswe bese luyasuswa.

Akukho ukunqwabelana kwengcindezi okwenzekayo phakathi nomsebenzi, ngaphandle kokwanda okubangelwa ingcindezi ye-hydrostatic yekholomu kasimende njengoba igeleza ikhuphuka i-annulus. Uma ukubekwa sekuqediwe, i-stinger noma i-packer iyakhululwa. Usimende oweqile ozungeza ngaphandle kwezimbobo ezingenhla ungahlehliswa uma ufunwa.

Umthamo we-slurry odingekayo ukuze uqedele ukuminya ojikelezayo awaziwa; ngakho-ke, inqwaba ye-slurry iyalungiswa. Ngenxa yalokho, kunethuba elinamandla lokuthi ezinye ze-slurry zikasimende zingangena emgodini,ipayipi lokubhoboza, noma ishubhu noma i-annulus ngaphezu kwethuluzi lokukhama phakathi nomsebenzi.

Uma lesi simende sethiwe, ipayipi lokubhoboza (noma ishubhu) lingase libhajwe embobeni. Ngakho-ke, ukuze kuncishiswe le ngozi, isigcini sikasimende kufanele sisetshenziswe esikhundleni sepaki. Kulula ukususa umhlangano we-stinger kune-packer, ngoba yokugcina ine-casing clearance encane. I-retainer kufanele isethwe ngokuseduze ngangokunokwenzeka nama-perforations angaphezulu. Lokhu kunciphisa ukuchayeka kwepayipi lokubhoboza odaka lukasimende olungangena emthonjeni ngokusebenzisa izimbobo ezingaphezulu.

Cindezela usimende

I-Cement Retainer isetshenziswa futhiukukhama usimendeimisebenzi. Ukusetshenziswa kwayo kuthathwa njengenye yezinhlobo zamasu okubekwa kwethuluzi le-Squeeze. Le nqubo ingahlukaniswa izingxenye ezimbili—indlela yokupakisha ekhamayo ebuyisekayo kanye nendlela yokugcina usimende ebhobokayo. Inhloso eyinhloko yokusebenzisa amathuluzi okuminyanisa ukuhlukanisa i-casing kanye ne-wellhead ngenkathi usebenzisa i-high pressure downhole.

Izigcini zikasimende zingamapaki adonsekayo anevalvu esetshenziswa yisidosi ekupheleni kwentambo yokusebenza (Fig.1). Ama-cement retainers asetshenziselwa ukuvimbela ukugeleza emuva lapho kungekho ukuphelelwa amandla kukasimende okulindelekile noma lapho ukucindezela okuphezulu okungafani okungalungile kungase kuphazamise ikhekhe likasimende. Ezimweni ezithile, ukusebenzisa ipaketha kuyingozi ngenxa yokuxhumana okungase kube khona nezimbobo eziphezulu. Lapho ufaka usimende izindawo eziningi, isibambi sikasimende sihlukanisa izimbobo eziphansi futhi ukuminya kwezoni okulandelayo kungenziwa ngaphandle kokulinda ukusethwa kwe-slurry.

I-drillable retainer inika u-opharetha ukuzethemba okwengeziwe ekusetheni ipakethe eduze nezimbobo. Enye inzuzo ukuthi umthamo omncane woketshezi ngaphansi kompakishi uyasuswa ngokusebenzisa izimbobo ngaphambi kodaka lukasimende.

Ithimba le-Vigor lizobe likhulula umkhiqizo wethu omusha I-WIDE RANGE BRIDGE PLUG maduze nje, uma ufuna ukwazi okwengeziwe ngayo, sicela ungangabazi ukuxhumana nathi ukuze uthole ukwesekwa kobuchwepheshe ochwepheshe kakhulu nokusekelwa komkhiqizo.

Ukuze uthole ulwazi olwengeziwe, ungabhalela ibhokisi lethu lemeyiliinfo@vigorpetroleum.com&marketing@vigordrilling.com