Lub luag haujlwm ntawm CMC hauv kev khawb tob hauv dej hiav txwv

1. Lub luag haujlwm tseem ceeb hauv cov kua dej drilling

Thaum lub sijhawm khawb dej tob tob, cov kua dej ua lub luag haujlwm tseem ceeb xws li txhawb nqa phab ntsa qhov dej, txias lub qhov khawb, tshem tawm cov chips, thiab tswj lub siab hauv qhov. CMC yog ib qho khoom siv tswj viscosity, rheological agent thiab thickener, uas siv dav hauv kev npaj cov kua dej khawb. Nws cov haujlwm tseem ceeb tau pom tseeb hauv cov hauv qab no:

1.1 Thickening thiab kho viscosity

Hauv kev khawb av tob, vim yog qhov dej tob thiab siab nce ntxiv, cov kua dej yuav tsum muaj qee qhov viscosity kom ntseeg tau tias nws cov fluidity thiab lub peev xwm nqa tau. CMC tuaj yeem ua kom cov kua dej khawb tuab thiab pab tswj kev ruaj khov ntawm cov kua dej khawb ntawm ntau qhov tob thiab siab sib txawv. Los ntawm kev kho qhov concentration ntawm CMC, qhov viscosity ntawm cov kua dej khawb tuaj yeem ua kom zoo dua kom ntseeg tau tias cov kua dej khawb muaj cov yam ntxwv ntws zoo, yog li nws tuaj yeem ntws tau yooj yim hauv cov chaw sib sib zog nqus thiab tiv thaiv teeb meem xws li lub qhov dej tawg.

1.2 Txhim kho cov khoom rheological

Cov khoom siv rheological ntawm cov kua drilling yog qhov tseem ceeb hauv kev drilling hauv dej hiav txwv tob. CMC tuaj yeem txhim kho qhov fluidity ntawm cov kua drilling, ua rau nws ntws du dua hauv av, txo qhov sib txhuam ntawm lub laum thiab phab ntsa qhov dej, txo kev siv zog thiab kev hnav khoom siv thaum lub sijhawm drilling, thiab ntev lub neej kev pabcuam ntawm cov khoom siv drilling. Tsis tas li ntawd, cov khoom siv rheological zoo kuj tseem tuaj yeem ua kom ntseeg tau tias cov kua drilling tuaj yeem nqa cov txiav thiab tiv thaiv kev sib sau ua ke ntawm cov khoom khov hauv cov kua drilling, yog li zam cov teeb meem xws li kev thaiv.

2. Kev ruaj khov ntawm qhov dej thiab kev txwv tsis pub muaj hydrate tsim

Thaum lub sijhawm khawb av tob tob, qhov ruaj khov ntawm lub qhov dej yog qhov teeb meem tseem ceeb. Cov cheeb tsam tob tob feem ntau ntsib cov xwm txheej geological nyuaj, xws li kev siab siab, kub siab, thiab cov av noo, uas yuav ua rau lub qhov dej tawg lossis cov kua dej hauv qhov dej poob. CMC pab txhim kho qhov ruaj khov ntawm phab ntsa qhov dej thiab tiv thaiv kev tawg los ntawm kev txhim kho qhov viscosity thiab rheological cov khoom ntawm cov kua dej hauv qhov dej.

Hauv kev khawb tob hauv dej hiav txwv, kev tsim cov hydrates (xws li cov roj av hydrates) kuj yog ib qho teeb meem uas tsis tuaj yeem tsis quav ntsej. Nyob rau hauv qhov kub qis thiab qhov siab siab, cov roj av hydrates yooj yim tsim thaum lub sijhawm khawb thiab ua rau cov kua dej khawb txhaws. Ua tus neeg sawv cev hydration zoo, CMC tuaj yeem tiv thaiv kev tsim cov hydrates, tswj cov kua dej ntawm cov kua dej khawb, thiab xyuas kom meej tias kev ua haujlwm drilling du.