Polyacrylamide (PHPA) oo aan si buuxda u daahirnayn waa polymer synthetic ah oo toosan loo isticmaalo sidii kordhinta viscocity-ga iyo kontaroolka rheology-ga ee dareerayaasha drilling-ka ee loogu talagalay aasaaska qoto dheer, geotechnical, iyo hawlaha pile-driving. Polymers-ka PHPA waxaa ka kooban unugyo acrylamide oo aan si buuxda loo daahirnayn ilaa kooxaha carboxyl, taasoo abuuraysa silsilad polymer ah oo qayb ahaan anionic ah. Qaab-dhismeedkan molekular ayaa u oggolaanaya PHPA inay bixiso kontaroolka viscocity-ga sare, xasilinta shale-ka, iyo yareynta luminta dareeraha marka loo eego buuxiyeyaasha dhaqanka sida bentonite, taasoo ka dhigaysa qayb muhiim ah nidaamyada dareeraha drilling-ka ee waxqabadka sare leh ee dhulka aan dhib weyn lahayn. Shaqada aasaaska qoto dheer, PHPA waxay leedahay hawlo badan oo muhiim ah oo ku jira qaababka dareerayaasha drilling-ka ee loo isticmaalo darbiyada diaphragm, barrette piles, drilling-ka caisson, iyo hawlaha CFA (auger joogto ah). Marka lagu daro dareerayaasha drilling-ka ku saleysan biyo ama saliid, PHPA waxay kordhisaa muuqaalka viscocity-ga iyo viscocity-ga caadiga ah iyadoo la ilaalinayo wax yar oo ah quruumaha, taasoo kor u qaadaysa xasiloonida godka, yareenaysa burburka dhulka aan xasilloonayn, isla markaana bixisa lubricant sare oo loogu talagalay qalabka gubanaya. Awoodda PHPA ee yareynta luminta biyaha marka laga gudbayo iskaashiga dhismayaasha ayaa si khaas ah muhiim u ah marka la drilling ka sameynayo lakabyada biyaha gelinaya, dhul ama sand, iyo qashinka isugu jira ee ka dhexjira mashruucyada dhismayaasha magaalooyinka iyo qodista qoto dheer. PHPA waxaa badanaa lagu bixiya sida budo qalalan, dareere la diyaariyey ka hor, ama xidhmooyinka dareeraha la isku daray. Diyaarinta goobta waxay ku lug leedahay fidinta ama dhaqiddada polymer-ka biyo cusub ama dareere saldhig ah, waxaana xiga isku dhafka farsamada si loo gaaro qoyaan dhammaystiran iyo qaybinta siman. Xaaladaha kaydinta ee habboon—oo laga ilaaliyo heerkul xad dhaaf ah, iftiin toos ah, iyo wasakhda qoyaan—ayaa muhiim ah si loo ilaaliyo daacadnimada polymer-ka. Marka la qoyso, qaab-dhismeedka PHPA wuxuu u baahan yahay in si taxadir leh loo kormeero viscocity-ga, dhibicda dhalidda, iyo sifooyinka luminta dareeraha iyadoo la isticmaalayo habraac tijaabo API oo caadi ah. Noocyada ugu muhiimsan ee PHPA waxay ku kala duwan yihiin darajada hydrolysis (badanaa 20–40% hydrolysis), qeybsanaanta miisaanka molekular (dhexdhexaad ilaa aad u sarreeya), iyo culeysyada charge, kuwaas oo si toos ah u saameeya dabeecadda rheological, dulqaadka milixda, iyo sifooyinka shear-thinning. Heerkul hydrolysis sareeya ayaa bixiya xakameyn shale oo horumarsan iyo dulqaadka milixda, halka qaababka hydrolysis hooseeya ay bixiyaan waxqabadka heerkul hoose iyo yareynta dareenka kalsiyumka. Noocyada gaarka ah ee loogu talagalay codsiyo gaar ah—sida PHPA xasilloon oo heerkul sare leh ama noocyada la jaan qaadi kara biopolymer—ayaa la heli karaa si loo daboolo deegaanada drilling-ka ee adkaysiga leh. Injineerada ayaa qeexaya PHPA iyadoo ku saleysan nooca qaabka dhulka (waxyaabaha clay, biyaha marroomka), shuruudaha xasiloonida godka, xeerarka torque iyo heerkulka ee qalabka drilling-ka, iyo qiyaasaha deegaanka (sensitivity biyaha cusub, biodegradability). Xulasha sidoo kale waxay tixgelinaysaa isku xira kharashka dareeraha, maadaama nidaamyada PHPA badanaa bixiyaan waxqabad aad u sareysa xitaa iyadoo ay jiri doonaan wax yar oo ah quruumaha marka loo eego nidaamyada ku saleysan bentonite, yareenaysa isticmaalka maaddada iyo kharashka maaraynta qashinka. Dareerayaasha drilling-ka ee ku saleysan PHPA waxay u baahan yihiin inay waafaqaan heerarka caalamiga ah ee khuseeya, oo ay ku jiraan API 13B-1 (heerarka tijaabada dareeraha drilling-ka), ISO 13500 (termilojiyaga iyo kala soocidda dareerayaasha drilling-ka), iyo xeerarka deegaanka ee gobollada. Injineerada badanaa waxay xaqiijiyaan waxqabadka polymer-ka iyada oo loo marayo tijaabooyinka viscocity ee API (Marsh funnel, viscometer rotiyada), tijaabooyinka luminta dareeraha (API cadaadis hoose iyo heerkul hoose—LPLT), iyo qiimeynta ku habboon dhulka ka hor inta aan la gelin goobta.
Polyacrylamide (PHPA) oo aan si buuxda u daahirnayn waa polymer synthetic ah oo toosan loo isticmaalo sidii kordhinta viscocity-ga iyo kontaroolka rheology-ga ee dareerayaasha drilling-ka ee loogu talagalay aasaaska qoto dheer, geotechnical, iyo hawlaha pile-driving. Polymers-ka PHPA waxaa ka kooban unugyo acrylamide oo aan si buuxda loo daahirnayn ilaa kooxaha carboxyl, taasoo abuuraysa silsilad polymer ah oo qayb ahaan anionic ah. Qaab-dhismeedkan molekular ayaa u oggolaanaya PHPA inay bixiso kontaroolka viscocity-ga sare, xasilinta shale-ka, iyo yareynta luminta dareeraha marka loo eego buuxiyeyaasha dhaqanka sida bentonite, taasoo ka dhigaysa qayb muhiim ah nidaamyada dareeraha drilling-ka ee waxqabadka sare leh ee dhulka aan dhib weyn lahayn. Shaqada aasaaska qoto dheer, PHPA waxay leedahay hawlo badan oo muhiim ah oo ku jira qaababka dareerayaasha drilling-ka ee loo isticmaalo darbiyada diaphragm, barrette piles, drilling-ka caisson, iyo hawlaha CFA (auger joogto ah). Marka lagu daro dareerayaasha drilling-ka ku saleysan biyo ama saliid, PHPA waxay kordhisaa muuqaalka viscocity-ga iyo viscocity-ga caadiga ah iyadoo la ilaalinayo wax yar oo ah quruumaha, taasoo kor u qaadaysa xasiloonida godka, yareenaysa burburka dhulka aan xasilloonayn, isla markaana bixisa lubricant sare oo loogu talagalay qalabka gubanaya. Awoodda PHPA ee yareynta luminta biyaha marka laga gudbayo iskaashiga dhismayaasha ayaa si khaas ah muhiim u ah marka la drilling ka sameynayo lakabyada biyaha gelinaya, dhul ama sand, iyo qashinka isugu jira ee ka dhexjira mashruucyada dhismayaasha magaalooyinka iyo qodista qoto dheer. PHPA waxaa badanaa lagu bixiya sida budo qalalan, dareere la diyaariyey ka hor, ama xidhmooyinka dareeraha la isku daray. Diyaarinta goobta waxay ku lug leedahay fidinta ama dhaqiddada polymer-ka biyo cusub ama dareere saldhig ah, waxaana xiga isku dhafka farsamada si loo gaaro qoyaan dhammaystiran iyo qaybinta siman. Xaaladaha kaydinta ee habboon—oo laga ilaaliyo heerkul xad dhaaf ah, iftiin toos ah, iyo wasakhda qoyaan—ayaa muhiim ah si loo ilaaliyo daacadnimada polymer-ka. Marka la qoyso, qaab-dhismeedka PHPA wuxuu u baahan yahay in si taxadir leh loo kormeero viscocity-ga, dhibicda dhalidda, iyo sifooyinka luminta dareeraha iyadoo la isticmaalayo habraac tijaabo API oo caadi ah. Noocyada ugu muhiimsan ee PHPA waxay ku kala duwan yihiin darajada hydrolysis (badanaa 20–40% hydrolysis), qeybsanaanta miisaanka molekular (dhexdhexaad ilaa aad u sarreeya), iyo culeysyada charge, kuwaas oo si toos ah u saameeya dabeecadda rheological, dulqaadka milixda, iyo sifooyinka shear-thinning. Heerkul hydrolysis sareeya ayaa bixiya xakameyn shale oo horumarsan iyo dulqaadka milixda, halka qaababka hydrolysis hooseeya ay bixiyaan waxqabadka heerkul hoose iyo yareynta dareenka kalsiyumka. Noocyada gaarka ah ee loogu talagalay codsiyo gaar ah—sida PHPA xasilloon oo heerkul sare leh ama noocyada la jaan qaadi kara biopolymer—ayaa la heli karaa si loo daboolo deegaanada drilling-ka ee adkaysiga leh. Injineerada ayaa qeexaya PHPA iyadoo ku saleysan nooca qaabka dhulka (waxyaabaha clay, biyaha marroomka), shuruudaha xasiloonida godka, xeerarka torque iyo heerkulka ee qalabka drilling-ka, iyo qiyaasaha deegaanka (sensitivity biyaha cusub, biodegradability). Xulasha sidoo kale waxay tixgelinaysaa isku xira kharashka dareeraha, maadaama nidaamyada PHPA badanaa bixiyaan waxqabad aad u sareysa xitaa iyadoo ay jiri doonaan wax yar oo ah quruumaha marka loo eego nidaamyada ku saleysan bentonite, yareenaysa isticmaalka maaddada iyo kharashka maaraynta qashinka. Dareerayaasha drilling-ka ee ku saleysan PHPA waxay u baahan yihiin inay waafaqaan heerarka caalamiga ah ee khuseeya, oo ay ku jiraan API 13B-1 (heerarka tijaabada dareeraha drilling-ka), ISO 13500 (termilojiyaga iyo kala soocidda dareerayaasha drilling-ka), iyo xeerarka deegaanka ee gobollada. Injineerada badanaa waxay xaqiijiyaan waxqabadka polymer-ka iyada oo loo marayo tijaabooyinka viscocity ee API (Marsh funnel, viscometer rotiyada), tijaabooyinka luminta dareeraha (API cadaadis hoose iyo heerkul hoose—LPLT), iyo qiimeynta ku habboon dhulka ka hor inta aan la gelin goobta.
Hel liisaska qalabka ugu dambeeyay, wararka warshadaha, iyo falanqaynta suuqa.