US 11,773,710 B2
Systems and methods to determine rotational oscillation of a drill string
Benjamin Peter Jeffryes, Cambridge (GB); and Adam Ian Bowler, Cambridge (GB)
Assigned to SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US)
Filed by SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US)
Filed on Nov. 16, 2018, as Appl. No. 16/194,028.
Prior Publication US 2020/0157930 A1, May 21, 2020
Int. Cl. E21B 44/02 (2006.01); G01H 1/10 (2006.01); E21B 21/08 (2006.01); E21B 47/007 (2012.01)
CPC E21B 44/02 (2013.01) [E21B 21/08 (2013.01); E21B 47/007 (2020.05); G01H 1/10 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A tangible, non-transitory, computer-readable medium that stores instructions executable by one or more processors, wherein the instructions are configured to cause the one or more processors to:
receive an operating parameter value detected at a detection location and a threshold axial acceleration value associated with an axial acceleration oscillation amplitude at a drill bit, wherein the drill bit is a part of a drilling system;
convert the operating parameter value into a corresponding axial acceleration oscillation amplitude at the detection location value of the drilling system;
convert the corresponding axial acceleration oscillation amplitude at the detection location into the axial acceleration oscillation amplitude at the drill bit;
compare the axial acceleration oscillation amplitude at the drill bit with the threshold axial acceleration value;
from the comparing of the axial acceleration oscillation amplitude at the drill bit with the threshold axial acceleration value, determine a presence of high frequency rotational oscillations occurring in the drilling system while drilling; and
adjust an operation of the drilling system, while drilling, in response to determining the presence of high frequency rotational oscillations occurring in the drilling system.