Caementa hydrau cementitious est materia, quae societatis maximum dividitur in vulgares et
tum firmandae </a> oleum. Ordinarius societatis maximum etiam constructione quae societatis maximum: in ASTM enumerantur signa est, cum societatis maximum est, olei quoque enumerantur signa in API. The fundamental difference between oil well cement and ordinary cement is that oil well cement has strict chemical composition and mineral composition, and no other materials are allowed to be added except 3%-6% dihydrate gypsum during production. Haec inducit maxime sectione chemical compositionem, atque firmare gradus et generis oleum et basic scientia per applicationem et productio. </ P>
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<P style = "text-align: justify;"> <img src = "http://general.cdn.jxues.com/images/20220516/094329/293657.jpg" alt = 'tum firmandae oleum "width =" D "altitudo =" D "/> </ p>
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<P> <strong> I. Chemical compositionem </ strong> </ p>
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<p>The quality of cement is mainly determined by its chemical composition, and advanced analytical methods have paved the way to obtain the chemical composition of cement. 1.2.1 eget components de mensa lists pelagus Romani G HSR societatis maximum. Ut videri potest ex notitia ad mensam Portland societatis maximum includit </ p>
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<P> In pelagus components, tricalcium aluminate C3a (3CaO A1203) tetracalcium ferric aluminate C4AF (4CaO A1203 Fe203) tricalcium silicate C3S (3CaO SiO2); dicalcium silicate C2S (2CaO SiO2). Per microscopic examen cuiusque tempus, ERROR IV mineralibus particulas includunt continent components (ERROR rationes, de XCV% of total societatis maximum): </ p>
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<P> (I) Potassium Tricalcium C3S (3CaO SiO2) sporarum polygonalis crystal est, unde superficies ad 50-60%. </ P>
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<P> (II) Potassium Dicalcium C2S (2ca0 SiO2): quia ideo undique gemmae chrystallinae -10-25% ad superficiem. Et moles totalis ad duo Calcium Ions supra (dicalcium et tricalcium) rationem LXXV%. </ P>
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<P> (III) Tetracalcium ferric aluminate, C4AF (4CaO A1203 Fe203): et compages porum formatae circa hoc duo Potassium Ions et supra. (IV) C3a (3CaO A1203) aluminate acicularibus, quae etiam pertinet ad structuram pore. </ P>
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<P> Et ideo ad LXXV% Potassium Ions et duas moles totalis cementum, et solida moles totalis ad XXV% of C4AF + C3a propterea quod societatis maximum mineralium. </ P>
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<P> <strong> II. Tum societatis maximum oleum gradu, genus et applicationem </ strong> </ p>
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<P> 2.1 societatis maximum oleum gradu et genere atque </ p>
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<p>Since the downhole conditions of cementing operations are completely different from the ground environment of construction projects, Chinese standards or API specifications stipulate special grading and classification according to chemical composition and mineral composition to adapt to different well depths and downhole conditions. Hoc tempore, API cubits et oleum Chinese signa atque firmare dividat in octo gradibus-A-H, quae sunt apti tam profundis, temperaturis et pressuris. </ P>
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<P> Quod autem idem campester societatis maximum est, olei quoque dividitur in: Ordinarius (o) C3a <XV% medium resistantia sulfate (MSR C3A≤8%,% SO2.3 sulfate excelsum resistentia (HSR C3A≤ VIII%,% 2C3A24 C4AF + quantopere eadem capax sit ad impetum resistere sulfate. </ p>
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<P> quoque omnes gradus societatis maximum oleum iidemque ad varias condiciones bene. Non est nisi unum genus commune. In chemical compositionem, et salu sint similis generis et ASTMC150. ARENATIO idoneam ad vadum res non est speciale requisitis. Non amplius adhibetur in Daqing, Jilin et oleum Liaoning agri in terra. Et parati societatis maximum slurry ratio est etiam relative simplex, - plerumque, A-gradu oleum bene societatis maximum potest misceri cum on-site aqua proportiones - interdum parva copia mixtum, ut coagulants opportune collustrari poterunt addidit secundum necessitates. </ p>
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<P> B Part resistentiam habeat medium sulfate (MSR) et excelsum resistentia sulfate (HSR). In chemical compositionem, et salu in B medio resistente generis gradus sint similis generis ASTMC150 II. Class B high resistance type is similar to ASTMC150 type V. It is generally suitable for shallow cementing operations that require sulfate resistance, and has not been used in my country at present.</p>
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<P> C Romani, primo et viribus Shanjing quae societatis maximum habet tria: Ordinarius (o) genus, genus medium resistantia sulfate (MSR) et summus genus Resistentes Superavit sulfate (HSR). In chemical compositionem et iudicii subtilitate Ordinarius (o) Similis herbae huic typus ASTMC150 Type III. Mane plerumque indigent operationibus ARENATIO puteusque brevis idoneus viribus resistendi sulfate. Ejus humilem et altum density, et fortitudinem, tum societatis maximum oleum gradu est in signationem vadum oleum et Gas et ad praeparationem cisternas ab aliis humilis density societatis maximum slurry. Et magnum habet commoda et patria est scriptor Zhoujing ad G, uti tum firmandae oleum gradu est in consilio ratio, quae definit usum C-tum societatis maximum oleum gradu est, et vix quod sit in patria. </ P>
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<P> Gradus D, E, et Romani Romani F quoque sunt quae societatis maximum Shanjing retardabitur motus. In media resistentia sulfate (MSR) et excelsum resistentia sulfate (HSR). Medium fere operationes idonea ARENATIO abyssi abyssi. D societatis maximum oleum gradu tam late usus est in North Sinis Oilfield Zhongyuan Oilfield et in terra. Because it is necessary to control the cement clinker with specific mineral composition to meet the index requirements of D-grade Shanjing cement, the complex process is difficult to control and the cost is high. Sed etiam societatis maximum oleum gradu D-addere potest suffectos moratorium ad G-A-gradus etiam societatis maximum oleum gradu. Processus est relative simplex, ut in annis, in D-gradu oleum etiam usus est etiam paulatim societatis maximum decrescentes. E, F, gradus gradus societatis maximum tam olei non est relatus in regionem suam. II classis dicuntur Cements oleum tam basic, bene Cements oleum et medium resistantia sulfate (MSR) et excelsum resistentia sulfate (HSR). Et oleo mixtum est sincera possit cementing operationes idonea maxime. Slurry systems societatis maximum etiam sunt diverse </ p>
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<P> G-A-gradus etiam societatis maximum oleum gradu est humilis-densitate materiae coniuncta esse possunt (musca cinis natantes grana, bentonite, etc.) ut et para humilis-pressura humilis-densitate societatis maximum slurry ratio eorumdem, ad sigillum pronissima formationis tuæ exitum, ; sic formari possit formare sputum mixtum, per conventional density slurry maximum vinculum est ratio, propter signationem conventional putei aquarum, et avem mundam combinat cum gravitate materiae (lapis denique pulveris fossiles et ferrum pulveris, etc.) Ad summus densitate carebit formet slurry maximum vinculum est ratio - cione de puteis profundioribus usus est summus pressura gas et in cisternis. Among them - G Romani oleum societatis maximum est tum in patria maxima et maxime manufacturers uti oleum in variis campis et in patria. The H-grade oil well cement is coarser than the G-grade oil well cement, and the water-cement ratio is smaller. Densitas autem velut maltha slurry de 1.98. Is est magis idonea redderentur ad ipsorum ratio, ad sigillum summus densitate carebit societatis maximum slurry summus pressura Gas intermittant. In meus usus patriae Tarim Oilfield magis. </ P>
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<P style = "text-align: justify;"> <img src = "http://general.cdn.jxues.com/images/20220516/094353/531106.jpg" alt = 'tum firmandae oleum "width =" D "altitudo =" D "/> </ p>
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<P> 2,2 Application et olei quoque societatis maximum </ p>
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<P> productio et copia olei quoque gluten quoddam vexillum seu specificatione gradus speciesque referebant. Ergo nec ratione utentis cementum aqua commixtam partem, ut in calce Abono downhole condicionibus ibidem miscet et cementing facit operationem. When using oil well cement that complies with API specifications or national standards, the formula design of cement slurry must be carried out according to the API simulation test method or application test method. Et ex bono tantum cementation vires alligatae armamentis potest curare salutem de constructione ARENATIO, amplio qualis ARENATIO, permanens ad signationem effectum ponere, ac ne transitus et rivos olei: Gas et aqua. </ P>
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<P style = "text-align: justify;"> <img src = "http://general.cdn.jxues.com/images/20220516/094430/283291.jpg" alt = 'tum firmandae oleum "/> < / p>
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<P> (I) aqua et demanda, tum firmandae societatis maximum slurry density, et oleum slurry productio rate requiritur ad omnes gradus etiam sint. </ P>
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<P> (II) quoniam maritimum, stagnum, paulo sal-afferentem formations et aspersos maculis aqua, incompositi, inordinati summus SULPHURATUS acidum-repugnant societatis maximum esse debet. </ P>
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<P> (III) Superficies enim casings vadum seu alios puteos, ut compendii gratia sanandi tempus, gradus vel A potest esse B; in profundis puteis, DE, & F grades potest adhiberi: quia summus pressura Gas puteos, quos ii gradus societatis maximum pondus potest esse mixta cum agente. Societatis maximum summus densitate carebit; si non requiritur humilis-densitate societatis maximum in C vel G-gradus gradu est plerumque adsuesco assuesco societatis maximum; </div>
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