Synthesis, characterization, and performance evaluation of the AM/AMPS/DMDAAC/SSS quadripolymer as a fluid loss additive for water‐based drilling fluid

Abstract

According to the molecular structure design requirements of the fluid loss additive resistant to high temperature, 2‐acrylamide‐2‐methyl propane sulfonic acid (AMPS), acrylamide (AM), dimethyl diallyl ammonium chloride (DMDAAC) and sodium styrene sulfonate (SSS) are selected as the structure monomers. Using ammonium persulfate as initiator, a new quadripolymer is synthesized through free radical aqueous solution polymerization. According to the minimum filtration loss of the fresh water‐based drilling fluid with 0.5 wt % quadripolymer, The synthesis conditions are optimized by orthogonal test: the mole ratio of AMPS/AM/DMDAAC/SSS is 5/7/2/1, the monomer concentration is 30 wt %, the initiator concentration is 0.8 wt %, the reaction temperature is 75°C and the pH is 10. The structure of the quadripolymer is characterized by Fourier transform infrared spectroscopy and nuclear magnetic resonance hydrogen spectroscopy. The results show that the quadripolymer contains all the designed functional groups. The thermal stability of the quadripolymer is tested by thermogravimetry, differential thermogravimetry, and differential scanning calorimetry. The results show that the thermal degradation of the quadripolymer is not obvious before 272.3°C. The rheological performance and filtration loss of the quadripolymer are evaluated. The results indicate that the filtration loss decreases with the increasing dosage of the quadripolymer before and after thermal aging test at 180°C for 16 h, and the filtration loss before the thermal aging test is smaller than that after the thermal aging test. The high temperature high pressure filtration loss (FL(HTHP)) experiment results also show that the quadripolymer fluid loss additive has excellent temperature‐resistant performance. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41762.

Preparation and performance of AMPS/AA/DMAA/SA copolymer as a filtrate reducer for oil well cementing

“…The dosage of the initiator has the greatest influence on the free radical polymerization because of the induced decomposition and the cage effect. 30 According to Pan, 31 less initiator leads to low efficiency and slow polymerization rate. The order of the influence on the filtration loss is B > C > D > E > A.…”

“…A large number of mass losses are caused by the thermal degradation of CAC in the main chain at higher temperature. Bai et al 30 reported the synthesis of AM/ AMPS/DMDAAC/SSS, the results showed the thermal degradation of the quadripolymer was not obvious before 273.2 8C. Guo et al 32 investigated the thermal degradation of the fluid loss additive HTF200C, and the result showed there was no apparent thermal degradation when the temperature was lower than 280 8C.…”

“…The reason is that cement slurries are strong alkaline suspensions, including different kinds of salt ions. The salt ions have the screening effect in the cement slurry suspension, which makes the molecular chain of the WSP twisting, 30 especially in 37% BWOW salt water cement slurry. But when the WSP concentration increases to 5%, the FL API is less than 90 mL for the 37% BWOW salt water cement slurry.…”

Comb‐shaped copolymer as filtrate loss reducer for water‐based drilling fluid

“…To avoid such problems, filtrate loss reducers are often used to stabilize bentonite suspensions at high temperature conditions . Since the introduction of polymeric additives in 1930 to control filtrate loss, their utility has increased widely and a variety of related products have been developed . While several high temperature‐resistant polymeric filtrate loss reducers have been developed for 200 °C environment, their addition increases viscosity of the drilling fluid to some extent.…”

Synthesis and application of sodium 2‐acrylamido‐2‐methylpropane sulphonate/N‐vinylcaprolactam/divinyl benzene as a high‐performance viscosifier in water‐based drilling fluid

“…[6][7][8] This was because that the acetal linkages in polysaccharide backbones of biopolymers were particularly labile at elevated temperature. 7,19,20 Despite the advances made in high-temperature synthetic polymer for water-based fluids, the challenge still remained in developing viscosifiers that could meet the higher temperature (in excess of 200 8C, depth of over 6000 m) requirements. Compared with biopolymers, synthetic polymers, such as polyacrylamides and related derivatives, 11,12 containing carbon-carbon backbones, could provide much better thermal stability and have been available for use as viscosifiers, fluid loss additives, and dispersants.…”