Described herein are methods of cementing at least a portion of a well comprising feeding a magnetorheological cementitious slurry to a well and applying a magnetic field to the magnetorheological cementitious slurry concurrent with at least a portion of said feeding step to cause a mechanical response in said magnetorheological cementitious slurry in the well. Also disclosed herein are methods of temporarily blocking at least a portion of a well comprising providing a magnetorheological fluid in a well, applying a magnetic field to cause a mechanical response in said magnetorheological fluid thereby blocking at least a portion of the well, and removing the magnetic field to unblock the portion of the well. Also disclosed herein is a magnetorheological cement.

The present invention relates to the field of material determination or analysis, and provides a method of assessing drying depth of cementitious materials including the following steps: preparing a plurality of cementitious material specimens; drying the cementitious material specimens; conducting electrochemical impedance spectrum measurement on each cementitious material specimen; accordingly determining a model for analyzing the drying depth of the cementitious material specimen. The method of assessing drying depth of the cementitious material provided by the present invention takes the influence of the resistivity changes on the model into consideration, and the drying depth of the cementitious material is reflected and reckoned with regularly changes of the electrochemical parameters, not only increasing the accuracy but also saving much testing labor, time and cost.

Concrete can be one of the most durable building materials and structures made of concrete can have a long service life. Consumption is projected to reach approximately 40 billion tons in 2017. Despite this the testing of concrete at all stages of its life cycle is still in its early stages although testing for corrosion is well established. Further many of the tests today are time consuming, expensive, and provide results only after it has been poured and set. Embodiments of the invention provide concrete suppliers, construction companies, regulators, architects, and others with rapid testing and performance data regarding the cure, performance, corrosion of concrete at different points in its life cycle based upon a simple electrical tests that remove subjectivity, allow for rapid assessment, are integrable to the construction process, and provided full life cycle assessment. Wireless sensors can be embedded from initial loading through post-cure into service life.

A cement plug is for plugging an annular region between a first casing and a second casing in a well. A method includes: perforating the first casing to open a flow path to the annular region; providing a magnetorheological cementitious slurry; inducing a magnetic field for affecting the physical properties of the magnetorheological cementitious slurry and for defining a lower boundary for the cement plug; feeding the magnetorheological cementitious slurry into the annular region through a perforation in the first casing; and impeding the mobility of the magnetorheological cementitious slurry in the annular region by exposing it to the magnetic field such that the magnetorheological cementitious slurry may consolidate substantially at the lower boundary without the need for a base device in the annular region.

A cement plug is for plugging an annular region between a first casing and a second casing in a well. A method includes: perforating the first casing to open a flow path to the annular region; providing a magnetorheological cementitious slurry; inducing a magnetic field for affecting the physical properties of the magnetorheological cementitious slurry and for defining a lower boundary for the cement plug; feeding the magnetorheological cementitious slurry into the annular region through a perforation in the first casing; and impeding the mobility of the magnetorheological cementitious slurry in the annular region by exposing it to the magnetic field such that the magnetorheological cementitious slurry may consolidate substantially at the lower boundary without the need for a base device in the annular region.

Described herein are methods of cementing at least a portion of a well comprising feeding a magnetorheological cementitious slurry to a well and applying a magnetic field to the magnetorheological cementitious slurry concurrent with at least a portion of said feeding step to cause a mechanical response in said magnetorheological cementitious slurry in the well. Also disclosed herein are methods of temporarily blocking at least a portion of a well comprising providing a magnetorheological fluid in a well, applying a magnetic field to cause a mechanical response in said magnetorheological fluid thereby blocking at least a portion of the well, and removing the magnetic field to unblock the portion of the well. Also disclosed herein is a magnetorheological cement.

Described herein are methods of cementing at least a portion of a well comprising feeding a magnetorheological cementitious slurry to a well and applying a magnetic field to the magnetorheological cementitious slurry concurrent with at least a portion of said feeding step to cause a mechanical response in said magnetorheological cementitious slurry in the well. Also disclosed herein are methods of temporarily blocking at least a portion of a well comprising providing a magnetorheological fluid in a well, applying a magnetic field to cause a mechanical response in said magnetorheological fluid thereby blocking at least a portion of the well, and removing the magnetic field to unblock the portion of the well. Also disclosed herein is a magnetorheological cement.

One of the chief purposes of researchers in the field of chemistry is to perform chemical reactions at high rates; a method that can be adopted to achieve such goal is to perform reactions in magnetized solvents. Being passed through the Solvents Magnetizing Apparatus (SMA) magnetizes the solvent, and the magnetic property remains intact for a few days, while most chemical reactions are done in less than one day. It should be taken into consideration that the magnetized solvent is different from the Zeeman effect in chemistry. This technology is widely used in performing chemical processes of most chemical reactions.

One of the chief purposes of researchers in the field of chemistry is to perform chemical reactions at high rates; a method that can be adopted to achieve such goal is to perform reactions in magnetized solvents. Being passed through the Solvents Magnetizing Apparatus (SMA) magnetizes the solvent, and the magnetic property remains intact for a few days, while most chemical reactions are done in less than one day. It should be taken into consideration that the magnetized solvent is different from the Zeeman effect in chemistry. This technology is widely used in performing chemical processes of most chemical reactions.

The present application provides a precise ion implantation type modified geopolymer and an efficient preparation method thereof, wherein the precise ion implantation type modified geopolymer comprise: a geopolymer source material with a specific size, which implanted by Si and Al ions with a designated dose by an ion implanter. The geopolymer source material consists of a mixture of solid waste, alkali activator, and water.