A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
New phosphate-based cement useful for drilling, completions in arctic
A new cement with very low permeability, very low thermal conductivity, and superior strength has been developed for use in cold regions. It is a challenge to design a cement for very cold climates, capable of setting at subzero temperatures but featuring a low heat of formation to avoid thawing permafrost. This article reports the development and testing of a novel phosphate-based cement for drilling and completion applications in permafrost regions. Part 1 presents a discussion of the concept behind the phosphate cement and its physical properties. The conclusion part reviews the formulation and testing of the cement with different additives such as ash, wollastonite, and extendopheres (silica spheres separated from fly ash), and in the presence of downhole gases. The new cement is based on Argonne National Laboratories earlier invention of ceramicrete, a composition of magnesium oxide and monopotassium phosphate. When mixed with suitable additives such as ash, it forms a rapid-setting cement. It gives a pumping time of greater than 3 hr in subzero temperatures. Monopotassium phosphate lowers the freezing point of the slurry and prevents it from freezing during mixing, pumping, and setting.
New phosphate-based cement useful for drilling, completions in arctic
A new cement with very low permeability, very low thermal conductivity, and superior strength has been developed for use in cold regions. It is a challenge to design a cement for very cold climates, capable of setting at subzero temperatures but featuring a low heat of formation to avoid thawing permafrost. This article reports the development and testing of a novel phosphate-based cement for drilling and completion applications in permafrost regions. Part 1 presents a discussion of the concept behind the phosphate cement and its physical properties. The conclusion part reviews the formulation and testing of the cement with different additives such as ash, wollastonite, and extendopheres (silica spheres separated from fly ash), and in the presence of downhole gases. The new cement is based on Argonne National Laboratories earlier invention of ceramicrete, a composition of magnesium oxide and monopotassium phosphate. When mixed with suitable additives such as ash, it forms a rapid-setting cement. It gives a pumping time of greater than 3 hr in subzero temperatures. Monopotassium phosphate lowers the freezing point of the slurry and prevents it from freezing during mixing, pumping, and setting.
New phosphate-based cement useful for drilling, completions in arctic
Ein neuer Bohrlochzement auf Phosphatbasis für den Einsatz in arktischen Gebieten
Wagh, Arun S. (author) / Natarajan, Ramkumar (author) / McDaniel, Richard L. (author)
Oil and Gas Journal ; 103 ; 53-55
2005
3 Seiten, 2 Tabellen, 9 Quellen
Article (Journal)
English
2014 Environmental Drilling and Completions Fluids Directory
Online Contents | 2014
Retarded cement compositions and methods for well completions
| European Patent Office | 2018
RETARDED CEMENT COMPOSITIONS AND METHODS FOR WELL COMPLETIONS
| European Patent Office | 2016
Retarded Cement Compositions and Methods for Well Completions
| European Patent Office | 2018