Viscosity of partially hydrolyzed polyacrylamide under shearing and heat at SA market

    • viscosity of partially hydrolyzed polyacrylamide under

      Viscosity of partially hydrolyzed polyacrylamide under

      For oil field applications, partially hydrolyzed polyacrylamide (HPAM) is the most widely used polymer. HPAM must maintain high viscosity to achieve good oil recovery. In reality, however, polymers can be severely degraded by shearing and heat in the underground environment.

    • rheology of diluted and semi-diluted partially hydrolyzed

      Rheology of diluted and semi-diluted partially hydrolyzed

      In the flow shear test, the flow characterization can be determined through studying the relationship between shear viscosity and shear rate. As shown in Fig. 5, the shear viscosity of the HAPM solutions increased as the concentration increased, while it decreased as the salinity increased. The curves of shear viscosity versus shear rate could be well fitted by a well-known power law (as shown in Eq.

    • synthesis and evaluation of partially hydrolysed

      Synthesis and evaluation of partially hydrolysed

      High molecular weight (106) partially hydrolysed polyacrylamide (PHPA) has been prepared and its efficacy as viscosifier in water based drilling mud has been evaluated. When PHPA is added to bentonite mud system, it causes a viscosity hump indicating encapsulating effect. The breakdown

    • the ultimate buyer's guide- polyacrylamide - polyacrylamide

      The Ultimate Buyer's Guide- Polyacrylamide - Polyacrylamide

      more than 8 m/s ) so as to avoid the decrease of shear force of polyacrylamide; if the feeding is too fast, it will form a “fish eye”. 4 Water temperature does not exceed 60 ° C

    • empirical correlations for viscosity of polyacrylamide

      Empirical Correlations for Viscosity of Polyacrylamide

      In this study, an extensive experimental work has been conducted to develop a set of correlations to predict the viscosity of partially hydrolyzed polyacrylamide solutions. These correlations account for the individual as well as combined effects of four major parameters; namely, shear rate, concentration, molecular weight and degree of ...

    • effects of alkali, salts, and surfactant on rheological

      Effects of Alkali, Salts, and Surfactant on Rheological

      Abstract: We hereby employ molecular dynamics (MD) simulations (∼6 μs in total) to investigate the chain dynamics, aggregation, and interfacial properties of the partially hydrolyzed polyacrylamide (HPAM) polymer. HPAM is widely used in chemical enhanced oil ...

    • rheology of diluted and semi-diluted partially hydrolyzed

      Rheology of Diluted and Semi-diluted Partially Hydrolyzed

      Rheology of Diluted and Semi-diluted Partially Hydrolyzed Polyacrylamide Solutions under Shear: Experimental Studies Article (PDF Available) in Petroleum 3(2) · August 2016 with 57 Reads

    • empirical correlations for viscosity of polyacrylamide

      Empirical Correlations for Viscosity of Polyacrylamide

      Empirical Correlations for Viscosity of Polyacrylamide Solutions with the Effects of Temperature and Shear Rate. II Article in Journal of Dispersion Science and Technology 35(12) · December 2014 ...

    • phpa partially hydrolyzed polyacrylamide suppliers manufacturers

      PHPA Partially Hydrolyzed Polyacrylamide Suppliers Manufacturers

      PHPA (also partially hydrolyzed polyacrylamide or HPAM) is designed for easy mixing in drilling mud systems and to improve its dispersion to eliminate “fish eyes”, This occurs in field work when mixing either large quantities rapidly or mixing high polymer concentrations without good mixing equipment.

    • potential applications of welan gum in upstream petroleum

      Potential Applications of Welan Gum in Upstream Petroleum

      Figure 2 presents the base mud viscosity, as well as WLG mud viscosity under varied shear rates. The tests were conducted at room temperature of 25°C. On this log-log plot, mud viscosity declines almost linearly at higher shear rates. This reveals that mud is a non-Newtonian fluid that abides by the power law.

    • solution properties of a hydrophobically associating

      Solution properties of a hydrophobically associating

      A hydrophobically-modified polyacrylamide and two partially hydrolyzed derivatives containing hydrophobic and carboxylic groups were prepared by micellar polymerization and post-hydrolysis. The molecular weight, second virial coefficient and radius of gyration were determined by static light scattering (SLS).

    • effect of using polymer buffer on efficiency ... - fac.ksu.edu.sa

      Effect of Using Polymer Buffer on Efficiency ... - fac.ksu.edu.sa

      investigated. Ionic liquid solution was prepared with suitable concentration and salinity. Partially Hydrolyzed Polyacrylamide Polymer (HPAM) was used in preparing polymer solutions. Core flooding runs were performed using slug sizes of ionic liquid followed by polymer buffers having different slug sizes, polymer concentrations,

    • partially hydrolyzed guar gum, an organoleptically-clean

      Partially Hydrolyzed Guar Gum, an Organoleptically-clean

      Partially hydrolyzed guar gum (PHGG) has a smaller molecular weight and less viscosity than original guar gum. PHGG, the product of guar hydrolysis, is shelf-stable, soluble at commonly-intake pH, resistant to heat, acid, salt, digestive enzyme, and with a bland, non- gummy texture, the properties of which pave the way for making

    • model upsizing for integrated evaluation of polymer

      Model upsizing for integrated evaluation of polymer

      The rheological study from the lab was performed with partially hydrolyzed polyacrylamide solution containing salt. For the degraded polymer representation, a lower viscosity function against concentration was modeled (blue curve in Fig. 4), considering a viscosity of 5 cP at a polymer concentration of 1250 ppm. 2.2.2. Shear thinning

    • study of hydrogel modified drilling fluid: preparation

      STUDY OF HYDROGEL MODIFIED DRILLING FLUID: PREPARATION

      in mud systems using partially hydrolyzed polyacrylamide polymer (PHPA) for inhibiting troublesome shale. The most significant changes were: maintaining constant the balance of materials and the supplemental addition of PHPA, controlling fluid loss, and selecting the use of seawater and NaCl for inhibition. Their

    • snf oil and gas extraction | snf holding company

      SNF Oil and Gas Extraction | SNF Holding Company

      POLYMER FLOODING. Polymers will increase water viscosity and thus the mobility ratio and the displacement efficiency in the reservoir. Recovery of trapped oil can be achieved by adding other chemicals to the injection brine; these can be surfactants (to decrease the interfacial tension between oil and water) or alkali...

    • potential of welan gum to enhance oil recovery

      Potential of Welan gum to enhance oil recovery

      heat. Welan gum (WLG) is a promising biopolymer because of its performance under challenging conditions. This paper investigates the factors that influence the vis-cosity of Welan gum solution. Tests show that WLG maintains high viscosity under the attacks of sodium ion, calcium ion, high temperature and long-term heating. Core

    • self-assembly properties of hydrophobically associating

      Self-assembly properties of hydrophobically associating

      Also, incorporation of FHA endowed polyacrylamide with strong salt, heat and shearing resistance because of the intra- and inter-molecular hydrophobically associating aggregates which lead to a dynamic physical cross-linking network in its structure.

    • solution properties of poly(acrylamide-co-3,5,5

      Solution properties of poly(acrylamide-co-3,5,5

      The physicochemical properties of hydrophobically modified polyacrylamide (HAPAM) containing a small amount of hydrophobic groups (3,5,5-trimethylhexane methacrylate) and its partially hydrolyzed derivative (HAPAM-10N500) were investigated. The 13C spectrum was used to establish the degree of hydrolysis of HAPAM-10N500.

    • some aspects of the properties and degradation of

      Some Aspects of the Properties and Degradation of

      Marcus Caulfield was born in Melbourne, Australia, in 1970. He received a B.Sc. degree in organic chemistry from the University of Melbourne (1993) and his Ph.D. (1998) in polymer science from the same university. He is currently undertaking postdoctoral research in the Polymer Science Group ...

    • effect of using polymer buffer on efficiency ... - fac.ksu.edu.sa

      Effect of Using Polymer Buffer on Efficiency ... - fac.ksu.edu.sa

      investigated. Ionic liquid solution was prepared with suitable concentration and salinity. Partially Hydrolyzed Polyacrylamide Polymer (HPAM) was used in preparing polymer solutions. Core flooding runs were performed using slug sizes of ionic liquid followed by polymer buffers having different slug sizes, polymer concentrations,

    • evidence-based approach to fiber supplements and clinically

      Evidence-Based Approach to Fiber Supplements and Clinically

      To improve palatability, however, a commonly marketed version is partially hydrolyzed guar gum, which is a nonviscous product that dissolves completely in water without altering viscosity. Other similar products also make claims of “dissolves completely” and/or “no viscosity” (eg, wheat dextrin, inulin), as if the nonviscous nature of ...

    • (doc) impact of salts on polyacrylamide hydrolysis

      (DOC) Impact of salts on polyacrylamide hydrolysis

      PAM undergoes alkaline hydrolysis under high temperature to produce partially hydrolyzed polyacrylamide (PHPA) (contains carboxylate groups) and ammonia 19, 20; 21. This chemical reaction is shown in Fig. 1.

    • in situ organically cross‐linked polymer gel for high

      In situ organically cross‐linked polymer gel for high

      In both mechanisms, the hydrolysis of the polymer plays a vital role during the process of forming gel. Under high temperatures and high pH environments, PAtBA and PAM undertake hydrolysis process that produces partially hydrolyzed polyacrylamide (PHPA) which contains ammonia (NH 3) and carboxylate groups. Meanwhile, the hydrolysis of the tBA ...

    • j. review expert panel, and f. alan andersen, phd

      J. Review Expert Panel, and F. Alan Andersen, PhD

      increases viscosity. 16,17 The chains, when entangling, also interact with each other and form stretches of double helices so that the network becomes mechanically more firm)8”9 Each glucuronate unit carries an anionic charge at physiological pH associated with its carbox ylate group. There are often hundreds of negative charges fixed to each chain.

    • stability of oligosaccharides derived from lactose

      Stability of Oligosaccharides Derived from Lactose

      In the case of OsLu, the exponential increase of viscosity associated with the structural changes took place later than in Vivinal GOS ingredient (~800 s versus ~620 s, resp.), suggesting again that OsLu maintains stable for longer time than Vivinal GOS under low shearing.

    • evaluation of rheological and thermal properties of a new

      Evaluation of Rheological and Thermal Properties of a New

      The polymer chain Fig. 8 Effect of polymer concentration on steady shear viscosity remains in the stretched form in deionized water due to profile at a shear rate of 1 s-1 (surfactant concentration = 0.025 %, repulsion of anions present along the polymer chain.

    • nsf products - baroid

      NSF Products - Baroid

      BORE-GROUT™ horizontal heat loop grout is a bentonite grout designed for use in grouting boreholes containing horizontally installed ground source heat loops. CLAY-DRILL™ Polymer-Based HDD Fluid CLAY-DRILL polymer-based HDD fluid is designed to provide borehole stabilization, counteract the sticking tendencies of clay, and maximize clay ...

    • agsci | biomass | biorefinery

      agsci | Biomass | Biorefinery

      Develop biorefinery-related technologies to the point that they are cost and performance competitive and are used by the nation’s transportation, energy, chemical, and power industries to meet their market objectives 2005: Demonstrate an integrated process for fuels production from biomass 2007: Complete technology development necessary to ...

    • list of abbreviations in oil and gas exploration and production

      List of abbreviations in oil and gas exploration and production

      List of abbreviations in oil and gas exploration and production ... blind shear rams ... Partially hydrolyzed polyacrylamide (mud) ...