公开(公告)号：US10436010B2

公开(公告)日：2019-10-08

申请号：US14889941

申请日：2014-11-05

Applicant: Landmark Graphics Corporation

Inventor： Avinash Wesley ,  Peter C. Yu

IPC: E21B47/00 ,  E21B44/00 ,  E21B47/09

Abstract: Tight spots in movements of a drill string in an oil well are identified by comparing a large interval hookload moving average to a short interval hookload moving average, comparing a large interval bit depth moving average to a short interval bit depth moving average, and DBSCANing the tight spots to identify a fully-stuck event.

公开(公告)号：US10060246B2

公开(公告)日：2018-08-28

申请号：US15025625

申请日：2014-12-29

Applicant: LANDMARK GRAPHICS CORPORATION

Inventor： Giulia Toti ,  Peter C. Yu ,  Avinash Wesley

IPC: G01V1/40 ,  E21B44/00 ,  G05B13/04

CPC classification number: E21B44/00 ,  E21B45/00 ,  G05B13/04

Abstract: An example method includes receiving a data set containing combinations of drilling parameter values and operating condition values for a drilling system corresponding to each combination of drilling parameter values. At least one of a frequency and a duration of use may be determined for each of the combinations of drilling parameter values in the data set. For at least some of the combinations of drilling parameter values, a contour map identifying the combinations of drilling parameter values, the operating condition values corresponding to the combinations of drilling parameter values, and at least one of the frequency and the duration of use may be displayed for at least some of the combinations of drilling parameter values.