US 12,291,929 B2
Hardbanding method and apparatus
Robert F. Miller, Birmingham, AL (US)
Assigned to Postle Industries, Inc., Cleveland, OH (US)
Filed by Postle Industries, Inc., Cleveland, OH (US)
Filed on Aug. 9, 2023, as Appl. No. 18/232,176.
Application 16/951,168 is a division of application No. 16/238,078, filed on Jan. 2, 2019, granted, now 10,954,728, issued on Mar. 23, 2021.
Application 18/232,176 is a continuation of application No. 16/951,168, filed on Nov. 18, 2020, granted, now 11,746,605.
Application 16/238,078 is a continuation of application No. 14/643,807, filed on Mar. 10, 2015, granted, now 10,267,101, issued on Apr. 23, 2019.
Claims priority of provisional application 61/991,223, filed on May 9, 2014.
Claims priority of provisional application 61/950,520, filed on Mar. 10, 2014.
Prior Publication US 2023/0383611 A1, Nov. 30, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. E21B 17/10 (2006.01); B23K 9/00 (2006.01); B23K 9/04 (2006.01)
CPC E21B 17/1085 (2013.01) [B23K 9/0026 (2013.01); B23K 9/048 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A hardbanding on a previously hardbanded tool joint of a pipe; said hardbanding comprises a pipe having a tool joint; an outer surface of a portion of said pipe having a prior hardbanding alloy and a base metal heat-affected zone formed during application of said prior hardbanding alloy; said base metal heat-affected zone extending about sides and bottom of said prior hardbanding alloy; said base metal heat-affected zone extending a greater depth into said tool joint than said prior hardbanding alloy; a secondary hardfacing alloy on at least a portion of a top surface of said prior hardbanding alloy; a top surface of said secondary hardfacing alloy extending above said top surface of said prior hardfacing alloy; a secondary heat-affected zone at least partially in said prior hardbanding alloy; a maximum depth of said secondary heat-affected zone is position above a bottom of said base metal heat-affected zone.