Tekinoroji yekuboorwa kwemurwi inotenderera kubva kuseri kwemugero inoshandiswa nerotary drilling rig

Zvinonzi reverse circulation zvinoreva kuti kana drilling rig iri kushanda, rotating disc inotyaira drill bit iri kumagumo kwe drill pipe kuti icheke nekupwanya dombo nevhu riri mugomba. Flushing fluid inoyerera ichipinda pasi pegomba kubva pa annular gap iri pakati pe drill pipe ne gomba wall, inotonhodza drill bit, inotakura dombo rakachekwa ne soil drilling slag, uye inodzokera pasi kubva mukati me drill pipe. Panguva imwe chete, flushing fluid inodzokera mugomba kuti iite circulation. Nekuti mukati me drill pipe diki zvikuru pane dhayamita ye wellbor, kumhanya kwemvura yematope mu drill pipe kunokurumidza kupfuura kwe positive circulation. Haisi mvura yakachena chete, asiwo drilling slag inogona kuunzwa pamusoro pe drill pipe uye inoyerera mu mud sedimentation tank. Madhaka anogona kudzokororwa mushure mekucheneswa.

Kana tichienzanisa nekutenderera kwakanaka, kutenderera kwemvura kunobva mudenga kune zvakanakira zvekumhanya kukuru kwekuboora, matope mashoma anodiwa, simba shoma rinoshandiswa netafura inotenderera, nguva yekuchenesa maburi inokurumidza, uye kushandiswa kwezvidimbu zvakakosha pakuboora nekuchera matombo.

Kuboorera kwegasi (reverse circulation drilling) kunogona kukamurwa kuita gas lift reverse circulation, pump suction reverse circulation uye jet reverse circulation zvichienderana ne circulation transmission mode ye flushing fluid, simba source uye working principle. Gas lift reverse circulation drilling inozivikanwawo se air pressure reverse circulation drilling, uye working principle yacho ndeiyi inotevera:

Isa pombi yekuboorera mugomba rekuboorera rakazadzwa nemvura inoyerera, dhonza tsvimbo yemhepo ine simba rekubatanidza nesimbi inotenderera kuti itenderedze uye icheke dombo nevhu nekutenderera kwetafura inotenderera, pfapfaidza mweya wakamanikidzwa kubva mumuromo wekupfapfaidza uri pamucheto wezasi wepombi yekuboorera, uye gadzira musanganiswa wegesi remvura ine jecha rematope wakareruka kupfuura mvura nevhu rakachekwa nejecha riri mupombi yekuboorera. Nekuda kwekubatana kwemusiyano wekumanikidzwa mukati nekunze kwepombi yekuboorera uye simba rekumanikidzwa kwemhepo, musanganiswa wegesi remvura ine jecha rematope nemvura inoyerera pamwe chete uye zvinodururwa mugomba revhu kana tangi rekuchengetera mvura kuburikidza nepaipi yekumanikidza. Ivhu, jecha, majecha nematombo zvakasara mugomba rematope, uye mvura inoyerera ichipinda mugomba.