公开(公告)号：US20160076354A1

公开(公告)日：2016-03-17

申请号：US14853229

申请日：2015-09-14

Applicant: Pason Systems Corp.

Inventor： STEPHEN WILLIAM LAI ,  CHRISTOPHER DARREN SALVADOR ,  KENNETH CHARLES HOROVATIN ,  TIMOTHY KEITH WALTER

IPC: E21B44/00 ,  E21B47/00 ,  G01L5/26

CPC classification number: E21B44/00 ,  E21B45/00 ,  E21B47/0006 ,  G01L3/108 ,  G01L3/1457 ,  G01L5/12

Abstract: A method for detecting stick-slip in a drillstring includes (a) measuring a parameter that is a function of a torque applied to the drillstring by a top drive system over a selected time period, the measuring being performed by at least one surface sensor that produces measurement data including torque values over a frequency range; (b) filtering out measurement data that has a frequency outside a selected frequency band, the selected frequency band including a resonant frequency of the drillstring; (c) identifying a minimum and a maximum torque value in the filtered measurement data and determining a difference of these two values; (d) determining a surface stick-slip index by dividing the difference of the maximum and minimum torque values by an average torque value over the selected time period; and (e) displaying the surface stick-slip index on a display.

Abstract translation: 一种用于检测钻柱中的粘滑的方法，包括：（a）在所选择的时间段内测量作为由顶部驱动系统施加到钻柱的扭矩的函数的参数，所述测量由至少一个表面传感器执行，所述表面传感器 产生包括频率范围内的转矩值的测量数据; （b）滤除具有选定频带外的频率的测量数据，所选择的频带包括钻柱的共振频率; （c）识别经滤波的测量数据中的最小和最大扭矩值，并确定这两个值的差值; （d）通过将所述最大和最小转矩值的差值除以所选择的时间段内的平均转矩值来确定表面粘滑指数; 和（e）在显示器上显示表面粘滑指数。