James J Roberson

20030141064, Jul 31, 2003

Jan 31, 2002

10/057860

James Roberson - Bedford TX, US

E21B043/22
E21B043/26

166/300000, 166/308000, 166/075150, 166/090100, 507/227000, 507/269000, 507/922000

A dry powder product comprised of an inorganic silicate-based compound and an organic compound are mixed with fresh water as a catalyst, such that the mixture enters into hydration reaction, and when injected into existing fractures in low permeability formations surrounding earth boreholes, the resulting increase in volume of the mixture from the hydration reaction causes the existing fractures to have increased dimensions. Because the hydrationreactionbetweenwater and the drypowderwill commence almost as soon as the water is mixed with the dry powder, there are various means and methods described to inhibit the hydration reaction from occurring until after predetermined times, for example, such as by using water soluble coatings for encapsulating the dry powder which dissolve after predetermined times, and by using water insoluble coatings over the powder and by causing the capsules to be mechanically disintegrated to allow water to come into contact with the dry powder, and by providing means for transporting the dry powder from the earth's surface in the tubular string down to the formation of interest surrounding the wellbore, the hydration reaction can be inhibited for predetermined periods of time.

54825539, Jan 9, 1996

Jun 2, 1994

8/252910

Joe F. Loftin - Plano TX
James E. Roberson - Hermitage TN
Wayne A. Wood - Brampton, CA

Illinois Tool Works Inc. - Glenview IL

B05B 716
B05B 1502

118302

A system for pin-point injection or application of a viscous, hot-melt conformal coating which is injected or applied onto a surface of an article and is readily removable from the surface to provide a temporary mask to selected areas of the article. The system includes a material supply unit which can accept the coating in at least one of granular, flake, chunk or block form and can heat the coating to transform the coating into a substantially viscous form for pumping out of the unit by a pump member. A heatable hose is also included having first and second opposite ends, the first end being connected for operable communication with the pump member and the hose including a heating element controlled by the supply unit and positioned along the length of the hose for maintaining a desired temperature within an interior of the hose. A pin-point nozzle member is connected to the second end of the hose for dispensing the coating at least onto localized minute areas of the article, the nozzle member including a valve member positioned therein which conducts heat from the hose to the nozzle member to maintain a desired temperature of the adhesive at the point of application and provides a precise cut off of the coating upon demand.