US 11,808,090 B2
Force modulation system for a drill bit
Ming Zhang, Houston, TX (US); Chris Cheng, Houston, TX (US); Jiaqing Yu, Houston, TX (US); and Xiongwen Yang, Beijing (CN)
Assigned to CNPC USA Corporation, Houston, TX (US); and Beijing Huamei Inc. CNPC, Beijing (CN)
Filed by CNPC USA Corporation, Houston, TX (US); and Beijing Huamei Inc. CNPC, Beijing (CN)
Filed on Sep. 25, 2022, as Appl. No. 17/935,126.
Application 17/935,126 is a continuation of application No. 17/100,870, filed on Nov. 21, 2020, granted, now 11,499,377.
Prior Publication US 2023/0015607 A1, Jan. 19, 2023
Int. Cl. E21B 10/62 (2006.01); E21B 10/42 (2006.01); E21B 12/00 (2006.01)
CPC E21B 10/62 (2013.01) [E21B 12/00 (2013.01); E21B 10/42 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A force modulation system for a drill bit, comprising:
a cutter being comprised of a cutter body having a cutting end, and a cutting surface made integral with said cutter body at said cutting end;
a holder being comprised of a holder body having an anchor end, a holding end opposite said anchor end, holder sides between said anchor end and said holding end, and a holder cavity at said holding end, said cutter body being in removable slide fit engagement with said holder cavity;
a holder retention means positioned on at least one holder side so as to exert a holder retention force in a first direction of said holder;
a first force member positioned against said holder so as to exert a first force in a second direction of said holder, said second direction being angled offset to said first direction; and
a second force member positioned against said holder so as to exert a second force in said first direction of said holder,
wherein said first direction is a direction of movement of said holder and said cutter relative to the drill bit, and wherein said second direction is another direction of movement of said holder and said cutter relative to the drill bit,
wherein said second direction is offset from said first direction so as to avoid damage from excessive force on said cutter in directions other than said first direction,
wherein first force member is made integral with said second force member, and
wherein said first force member being made integral with said second force member is comprised of a first spring portion, a second spring portion, and a hinge portion between said first spring portion and said second spring portion, said second force member being comprised of said second spring portion.