US 9,811,630 B2
Multilevel force balanced downhole drilling tools and methods
Shilin Chen, Montgomery, TX (US)
Assigned to Halliburton Energy Services, Inc., Houston, TX (US)
Filed by Halliburton Energy Services, Inc., Houston, TX (US)
Filed on Feb. 10, 2017, as Appl. No. 15/429,315.
Application 15/429,315 is a division of application No. 14/554,836, filed on Nov. 26, 2014, granted, now 9,587,438.
Application 14/554,836 is a continuation of application No. 13/133,615, granted, now 8,899,357, issued on Dec. 2, 2014, previously published as PCT/US2009/067263, filed on Dec. 9, 2009.
Claims priority of provisional application 61/174,769, filed on May 1, 2009.
Claims priority of provisional application 61/121,723, filed on Dec. 11, 2008.
Prior Publication US 2017/0154149 A1, Jun. 1, 2017
Int. Cl. G06F 17/50 (2006.01); E21B 10/43 (2006.01); E21B 10/55 (2006.01)
CPC G06F 17/5086 (2013.01) [E21B 10/43 (2013.01); G06F 17/5009 (2013.01); E21B 10/55 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method of designing a downhole drilling tool, comprising:
simulating drilling a wellbore using a downhole drilling tool including a rotational axis extending through a bit body and a plurality of cutting elements disposed on a plurality of blades on the bit body, the plurality of blades and the plurality of cutting elements cooperating with each other to form a cutting face profile including a plurality of neighbor cutting elements having groups of three or four neighbor cutting elements;
evaluating imbalance forces acting on each group of three or four neighbor cutting elements on the cutting face profile; and
determining locations for installing the plurality of cutting elements on the plurality of blades based on the imbalance forces such that each group of three or four neighbor cutting elements are level four force balanced with respect to each other.