Modification of the molar anionic charge density of acetone–formaldehyde–sulfite dispersant to improve adsorption behavior and effectiveness in the presence of CaAMPS®‐<i>co</i>‐NNDMA cement fluid loss polymer

Plank, Johann; Dugonjic-Bilic, Fatima; Lummer, Nils Recalde

doi:10.1002/app.29261

Cited by 29 publications

(12 citation statements)

References 7 publications

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“…Between different additives present in oil well cement, multiple interactions are possible, as has been shown in previous work 10, 11, 12, 22. Here, as the working mechanism of the NaAMPS®‐itaconic acid retarder is based on adsorption, the potential exists that it will perturb the effectiveness of other additives, which also work by adsorption.…”

Section: Resultsmentioning

confidence: 68%

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Working mechanism of a high temperature (200°C) synthetic cement retarder and its interaction with an AMPS®‐based fluid loss polymer in oil well cement

Tiemeyer

Plank

2011

J of Applied Polymer Sci

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A copolymer comprising of 2-acrylamido-2methyl propane sulfonic acid (AMPS V R ) and itaconic acid (molar ratio 1 : 0.32) was synthesized by aqueous free radical polymerization and probed as high temperature retarder for oil well cement. Characteristic properties of the copolymer including molar masses (M w and M n ), polydispersity index and anionic charge amount were determined. The copolymer possesses a M w of $ 2 Â 10 5 g/mol and is highly anionic. HT/HP consistometer tests confirmed effectiveness of the retarder at temperatures up to 200 C. The working mechanism of NaAMPS V R -co-itaconic acid was found to rely exclusively on its huge calcium binding capacity (5 g calcium/g copolymer). It reduces the amount of freely dissolved, nonbound calcium ions present in cement pore solution and thus hinders the growth of cement hydrates because of lack of calcium. The value for the calcium binding capability is 46 times higher than the stoichiometric amount per ACOO À functionality. Con-sequently, calcium also coordinates to other donor atoms present in the retarder. NaAMPS V R -co-itaconic acid also adsorbs onto cement, as was evidenced by TOC analysis of cement filtrates, zeta potential measurement and decreased rheology of cement pastes. However, adsorption plays no role in the retarding mechanism of this copolymer. Combination of NaAMPS V R -co-itaconic acid retarder with a common CaAMPS V R -co-NNDMA fluid loss additive (FLA) revealed that competitive adsorption on cement between these two admixtures occurs. The retarder fills interstitial adsorption sites on cement located between those occupied by the larger FLA molecules. In consequence, fewer amounts of CaAMPS V R -co-NNDMA can adsorb and its effectiveness is reduced.

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Section: Resultsmentioning

confidence: 68%

“…However, through multiple ways of interaction additives can influence each other positively ore negatively in their performance. Some of these interactions have been presented in recent works 12, 13…”

Section: Introductionmentioning

confidence: 99%

Working mechanism of a high temperature (200°C) synthetic cement retarder and its interaction with an AMPS®‐based fluid loss polymer in oil well cement

Tiemeyer

Plank

2011

J of Applied Polymer Sci

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“…Furthermore, in oil‐well cement slurry with alkaline environment, carboxyl groups (COOH) and a portion of the amide groups (CONH) hydrolysis into carboxyl oxygen (COO). The carboxyl oxygen can form a coordinate bond with Ca 2+ on the surface of the well cement particles, and the adsorption effect occurs . These groups cooperate with the unique structure of the terpolymer, increasing the binding of free water and further preventing the loss of water.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and characterization of SSS/HAM/AA terpolymer as a fluid loss additive for oil well cement

Zhang

2018

J of Applied Polymer Sci

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A terpolymer comprising of sodium styrene sulfonate (SSS), n-methylol acrylamide (HAM), and acrylic acid (AA) was synthesized by aqueous free radical copolymerization and evaluated as fluid loss additive (FLA) in oil well cement. In this article, HAM is first introduced in the preparation of FLA as an environment-friendly monomer, which effectively improves the adhesion and fluid loss control of the terpolymer. The experimental synthesis conditions were optimized by orthogonal experiments. The molecule weight of the terpolymer was determined by gel permeation chromatography. The molecule structure of the synthesized terpolymer was verified by Xray photoelectron spectroscopy and Fourier transformer infrared spectrum. The thermal stability of the synthesized terpolymer was tested by thermogravimetry (TG). The structure of the terpolymer aqueous solution was observed by scanning electron microscope. The results show that SSS/HAM/AA has an excellent thermal resistant. The thermal degradation is not obvious before 295.2 8C. Furthermore, the microstructure of SSS/HAM/AA in water conducive to good fluid loss control ability. When the dosage of SSS/HAM/AA is up to 2.0% in fresh water cement slurry, the filtration loss [FL (HTHP) ] can be controlled within 50 mL at 90-150 8C. SSS/HAM/AA has an excellent property of reducing filtration loss.

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“…CaATBS-co-NNDMA: The copolymer of acrylamide tert-butylsulfonic acid (ATBS) and N,N-dimethylacrylamide (NNDMA) was synthesized by aqueous free radical polymerization as previously reported (Plank 2008). The weight average molecular weight (M w ) of this linear blockcopolymer was determined by gel permeation chromatography and was found to be 1.8·10 6 g/mol.…”

Section: Fluid Loss Additivesmentioning

confidence: 99%

Study On Admixtures For Calcium Aluminate Phosphate Cement Useful To Seal CCS Wells

Bilic¹,

Tiemeyer²,

Plank³

2011

SPE International Symposium on Oilfield Chemistry

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Conventional Portland cement is known to degrade under the attack of CO 2 . The failure is caused by formation of CaCO 3 which in the presence of wet CO 2 can leach as calcium bicarbonate Ca(HCO 3 ) 2 . This way, channels for further ingress and migration of carbon dioxide are created. Recently, a new binder system based on calcium aluminate phosphate cement has been developed which exhibits outstanding CO 2 resistance and temperature stability up to 320 °C. Main limitation of this novel binder system is a lack of additives to retard and control the water loss from the aqueous slurry.In our study, we first present an effective retarding admixture for this cement. Comparison of four different retarders (boric acid, tartaric acid, calcium lignosulfonate and butylene triamine pentamethylene phosphonic acid) revealed that only a combination of boric and tartaric acid at the specific ratio of 2.7:1 (wt./wt.) retards hydration of this cement long enough to guarantee a pumpability time of over 6 h at a pressure of 200 bars and a temperature of 80 °C.Testing of numerous fluid loss additives showed that conventional admixtures based on polyvinyl alcohol, cellulose ether or polyethylene imine do not prevent water loss. This lead to the conclusion that neither film forming additives nor synthetic polymers which physically plug cement filtercake pores will work sufficiently in this specific cement system. Thus, polymers which control fluid loss by adsorption within the pores of the filtercake were probed. This approach proved to be successful. Application of a fluid loss additive based on acrylamide tert-butylsulfonate (ATBS) produced excellent fluid loss control, even at 80 °C. The mechanism behind this performance was found to be reduction of filter cake permeability by adsorption of the high molecular weight polymer onto the positively charged surfaces of cement hydrate phases. Interaction of this admixture with the binder and its working mechanism are presented in detail.

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Modification of the molar anionic charge density of acetone–formaldehyde–sulfite dispersant to improve adsorption behavior and effectiveness in the presence of CaAMPS®‐co‐NNDMA cement fluid loss polymer

Cited by 29 publications

References 7 publications

Working mechanism of a high temperature (200°C) synthetic cement retarder and its interaction with an AMPS®‐based fluid loss polymer in oil well cement

Working mechanism of a high temperature (200°C) synthetic cement retarder and its interaction with an AMPS®‐based fluid loss polymer in oil well cement

Synthesis and characterization of SSS/HAM/AA terpolymer as a fluid loss additive for oil well cement

Study On Admixtures For Calcium Aluminate Phosphate Cement Useful To Seal CCS Wells

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