Other

Agfa Corporation

Michael G Vieira

Amy Pietrzak

Andrew Houbre

Marvin Boedeker

Michael Raindl

Mark Brodeur

Jeffrey D Sutherland

A hydraulic fracturing ball sealer used in fracturing of shale formations. A preferred embodiment is constructed of a generally spherical core and a pair of hemispherical shells positioned about the core. The shells are secured to each other along an equatorial seam. The multilayer frac-ball provides a strong but machinable structure with a pliable outer surface that is corrosion resistant, has a specific gravity that allows it to float in the fracturing fluid, and is relatively easy and inexpensive to manufacture. The frac-ball of the present invention is a two piece metal and polymer design. A two-part embodiment comprises a polymer core with a metal case or shell. A layer of epoxy resin may be used to secure the shell to the core. Alternate embodiments include multiple layers of different materials, generally arranged concentrically within the spherical shape. The surface of the frac-ball may be smooth, scored, or serrated.

Hydraulic fracturing ball sealers

An apparatus supports one or more articles of various sizes on a vehicle surface during transport with a vehicle. The apparatus includes a substantially planar platform for supporting the articles, and one or more straps for securing the articles to the platform. The platform includes: a top slip-resistant surface for preventing the article from sliding along the slip-resistant top surface; a bottom slip-resistant surface for preventing the platform from sliding along the vehicle surface; a plurality of bearing members; a plurality of slots for selectively engaging the straps; one or more handles; and a recess defined within a bottom area of the platform containing the plurality of slots. The straps support the articles by engaging the platform through two or more of the slots, bearing against two or more of the bearing members and passing through the recess without contacting the vehicle surface.

Carrier for various-sized articles operatively supported by a vehicle

A thin wall external drum for an external drum imaging system includes a cylindrical portion having a hollow tube and a pair of end plates mounted to opposing sides of the hollow tube, wherein the hollow tube has the wall thickness less than or equal to about 1.5 percent of the outside diameter of the external drum.

Thin-wall drum for external drum imaging system

Growing community of inventors

Lowell, MA, United States of America

Michael G Vieira