Patent ID: 8640770

Claim:
An end ring for a downhole tool having a base pipe and a tubular sheath partially covering the base pipe, wherein the downhole tool is for use in a wellbore, and wherein the end ring comprises: a. a first ring having an inner diameter, a first ring thickness, a first ring outer surface, a first ring first edge, and a first ring second edge; b. a second ring having the inner diameter, a second ring thickness, a second ring outer surface, a second ring first edge, and a second ring second edge; and wherein the second ring thickness is at least 25 percent greater than the first ring thickness; c. a shoulder having the inner diameter, and wherein the shoulder has a sloped outer surface connecting the first ring second edge to the second ring first edge; and wherein the end ring slides over the base pipe and connects edges of the tubular sheath to the base pipe; d. a first ring lip formed on the first ring second edge; e. a plurality of flutes longitudinally cut in the first ring outer surface, through the sloped outer surface of the shoulder into the second ring outer surface, wherein each flute is oriented in parallel to other flutes and parallel to a longitudinal axis of the end ring; f. a plurality of first ring fastener holes disposed through the first ring; g. a plurality of second ring fastener holes disposed through the second ring; h. a plurality of first diameter fasteners, wherein each first diameter fastener engages one of the first ring fastener holes to connect the first ring of the end ring to the tubular sheath at an edge of the tubular sheath; and i. a plurality of second diameter fasteners, wherein each second diameter fastener engages one of the second ring fastener holes to connect the second ring to the base pipe and wherein the end ring connects the tubular sheath to the base pipe allowing the downhole tool to be run downhole to a maximum depth of the wellbore with low torque and little drag without hanging up or sticking on well mud and well particulate flowing opposite the direction in which the downhole tool is run in the wellbore.