Patent ID: 11920454
Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 5:
6. A system for predicting a stick-slip event, comprising:
a sensor configured to measure one or more surface properties at the surface of a wellbore;
a downhole tool configured to measure one or more downhole properties of the wellbore; and
a computing system configured to:
receive the one or more surface properties and the one or more downhole properties;
determine that the one or more surface properties and the one or more downhole properties match a predetermined distribution, wherein:
the predetermined distribution comprises a distribution previously measured before two or more previously detected stick-slip events;
each of the two or more previously detected stick-slip events is assigned to a first stick-slip severity level or a second stick-slip severity level in the stick-slip prediction model;
the first stick-slip severity level and the second stick-slip severity level each comprise a range from a lower stick-skip amount to an upper stick-slip amount; and
the range of the second stick-slip severity level is greater than the range of the first stick-slip severity level;

determine a likelihood that a stick-slip event will occur based on the predetermined distribution, wherein determining the likelihood that the stick-slip event will occur comprises determining the likelihood that the stick-slip event will occur within a predetermined distance from a location where the one or more downhole properties are measured;
determine a likelihood that the stick-slip event is assigned to the first stick-slip severity level or the second stick-slip severity level based on the predetermined distribution; and
vary at least one of: a rate of rotation of a portion of a tubular string in the wellbore, a weight on a drill bit in the wellbore, a trajectory of a downhole tool in the wellbore, or a force exerted on the downhole tool in response to the likelihood that the stick-slip event will occur exceeding a first predetermined threshold and in response to the likelihood that the stick-slip event is assigned to the second stick-slip severity level exceeding a second predetermined threshold.