Archive for October, 2013


Wednesday, October 23rd, 2013

New website

Monday, October 21st, 2013

Webinar: Patent research on retarders used in oil well cements

Wednesday, October 16th, 2013

Cementing is an important task in oil well completion. After the completion of drilling, a tubular body is introduced into the drilled wellbore, which is secured in the well by the process of primary cementing. In this process, the cement is placed in the annular space between the tubular body and wellbore, thereby forming a cement sheath to bond and support the tubular body and also to provide zonal isolation between the layers of wellbore. Retarders are generally used to extend the thickening time of cement slurry, thereby giving adequate time for proper placement of slurry in the annulus. Various types of retarders are used, depending upon the conditions of the wellbore. Retarder materials are mainly classified under lignosulfonates, cellulose derivatives, hydoxycarboxylic acids, organophosphates, inorganic compounds and synthetic polymers.

SciTech has conducted a study of patent literature in the area of retarders used in oil well cements. The study has identified the key patent filers as well as the different retarders that have been considered by them. The white space identification in the patent map created by SciTech can lead researchers to opportunities that are still unexplored.

To find out more click here