US 11,732,570 B2
Indirect detection of bending of a collar
Joachim Sihler, Cambridge (GB); John George Allen Charlesworth, Cambridge (GB); Adam Ian Bowler, Cambridge (GB); Michael Hayes Kenison, Richmond, TX (US); and John Mervyn Cook, Cambridge (GB)
Assigned to SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US)
Filed by Schlumberger Technology Corporation, Sugar Land, TX (US)
Filed on Jul. 30, 2020, as Appl. No. 16/942,820.
Claims priority of provisional application 62/880,918, filed on Jul. 31, 2019.
Prior Publication US 2021/0032974 A1, Feb. 4, 2021
Int. Cl. E21B 47/00 (2012.01); E21B 47/007 (2012.01); E21B 47/135 (2012.01); E21B 44/00 (2006.01); E21B 47/017 (2012.01); E21B 41/00 (2006.01)
CPC E21B 47/007 (2020.05) [E21B 44/005 (2013.01); E21B 47/017 (2020.05); E21B 47/135 (2020.05); E21B 41/0085 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A drilling system, comprising:
an internal assembly comprising:
a chassis enclosing an instrumentation tool of the drilling system;
an electronics board of the instrumentation tool located within the chassis; and
a strain gauge coupled to the electronics board, the strain gauge being configured to output a signal associated with a strain deformation of the internal assembly, wherein the strain gauge includes a torsion strain gauge measuring torsion strain deformation of the electronics board, and isolated from in-plane bending, out-of-plane bending, and axial strain deformation of the electronics board; and
a drill collar coupled to and enclosing the internal assembly such that a strain deformation of the drill collar causes the strain deformation of the internal assembly.