...). In this study, cement slurries were designed at typical class H conventional 16.4 ppg density. As the study was performed at temperature up to 375°F, lignosulfonate retarder was used (noted LS). LS is one of the most widely used set retarders for slurry designs at moderate temperatures ( Nelson and Guillot...

... on varying the following parameters: OBM contamination (0%, 0.6%, 1.1%, 2.2%, 4.3%) Curing time (4 hrs, 6 hrs, 8 hrs, 1 day, 3 days, 7 days) Temperature (25˚C, 75 ˚C) API recommendations were followed for preparing the cement slurries. The destructive, as well as non-destructive tests were...

...-pressure influx was expected. The resin-based cement system, which was placed as a tail slurry was designed to have better mechanical properties as compared to the conventional cement systems. The paper describes the process used to get the right resin-based cement slurry design and how its application...

..., and compounded with the cement to improve the tensile properties of the well-cement. Triazine polymer was characterized by fourier transform infrared spectroscopy and thermogravimetric analysis. The triazine polymer was mixed with cement and the cement slurries were cured at 180 °F under 3000 psi for 3 days...

... of the cement slurry formulated with the fluid loss copolymer was achieved. Additionally, it was determined that an increase in Đ improved fluid loss performance for a given Mn and Rg. More interestingly, an increase in Rg at fixed Mn and Đ decreases fluid-loss performance, which is counterintuitive...

... Even though PV remains important for cement pumping capability purposes, as the focus of our study is mostly on cement slurry stability at rest prior to setting, PV data will not be discussed here. Additional complexity with cement systems for both theoretical and experimental developments...

... Boncan and Dillenbeck 2003 ). Currently, there is not a recommended procedure to quantitatively measure cement additives that facilitate gas expansion. This paper describes a methodical approach to quantify gas expansion within cement slurries. Traditionally, a known rudimentary technique in measuring...

.... To stabilize the cement slurry at high temperature and prevent settling, a combination of a commercial welan gum and a delayed release, crosslinked guar gum high temperature suspending agent was used. Instruments and Procedures Cement characterization Phase composition of the cement sample...

... revealed that modification of the ATBS-NNDMA copolymer with phosphate groups greatly improves its fluid loss performance in both fresh and sea water cement slurries. Additionally, it extends its temperature stability up to 150 °C (300 °F), as was observed in stirred fluid loss tests. Furthermore...

... chemistry mercury intrusion porosimetry porosity cement slurry latex Introduction As oil or gas wells are being cemented to ensure zonal isolation, occurrence of gas migration during primary cementing has often been reported to be a major issue for operators and service companies ( Nelson...

... polymer cement retarder provides unique synergistic property in presence of an AMPS ® -based cement fluid loss control polymer that is giving additional suspension capability useful for water-extended lightweight density cement slurry; thereby, eliminating the need for an extra viscosifying agent...

... commercial samples. The impact of the PCE and AFS dispersants on the fluid loss of cement slurries achieved from hydroxyethyl cellulose was investigated via static fluid loss and rheology measurements. All PCE polymers improved the fluid loss performance of HEC significantly more than AFS; i.e. they required...

... Abstract Synthetic polymers have long been used as fluid-loss additives (FLAs) in hydraulic cement slurries for cementing subterranean zones. Typically used synthetic polymeric materials include N,N-dimethylacrylamide and sulfonated acrylamide monomers, which are preferred for high temperature...

... & Gas sedimentation aid provide cement-slurry stability drilling fluid chemistry drilling fluid property casing and cementing cement sheath slurry stability slurry drilling fluid selection and formulation drilling fluid formulation concentration stability cement slurry free fluid particle...

... Abstract On deep and ultra-deep wells, high temperature stable additives are applied to control the properties of cement slurries. For fluid loss control, polymers based on 2-acrylamido-tertiary-butyl sulfonic acid (ATBS) are commonly used. However, at elevated temperatures the performance...

... a novel, simple and versatile laboratory test procedure to measure the shear bond strength between cement and shale. The new procedure was used to develop cement formulations to improve the cement-to-shale bond. Various types of surfactants were added to cement slurry to evaluate their effects on cement...

...) and two graft copolymers, one based on humic acid-{ATBS-co-NNDMA-co-acrylic acid} and another based on lignite-{ATBS-co-NNDMA} were studied. Rheology and fluid loss of cement slurries prepared from fresh water, synthetic sea water and 20 % NaCl were measured at 27 °C and 150 °C. Significant differences...

... selection and formulation casing and cementing fluid loss control additive api fluid loss value cement slurry molecular weight loss control statistical polymer diblock copolymer cement chemistry copolymer fluid loss control cement formulation concentration admixture slurry cement property...

... Abstract Oil well cement slurries commonly incorporate several admixtures such as e.g. retarder, dispersant, fluid loss additive, anti-free water agent, defoamer etc. Between them, additive-additive interactions may occur which can result in incompatibilities and reduced performances (the most...

... or unmodified) (%bwoc) 3 0.8 0.5 0.3 1.5 0.3 1 The rheologies of the cement slurries were measured at RT after conditioning the slurry at the same temperature for 20 minutes in an atmospheric consistometer. For measurements at elevated temperature, new slurries were prepared, conditioned at test...