Global Patent Index - EP 0887511 A1

EP 0887511 A1 19981230 - Method and system for the detection of the precession of a drill string element

Title (en)

Method and system for the detection of the precession of a drill string element

Title (de)

Verfahren und Vorrichtung zur Erfassung der Präzession eines Bohrstrangelementes

Title (fr)

Méthode et système de détection de la précession d'un élément d'une garniture de forage

Publication

EP 0887511 A1 19981230 (FR)

Application

EP 98401475 A 19980617

Priority

FR 9707931 A 19970625

Abstract (en)

The method of detecting the precession of a drilling element rotating in a shaft involves acquiring at least one measure from measuring devices placed near the surface, representing the vibration of the element in the shaft. This measurement is then automatically treated to produce a mean location and a significant ray in the spectrum of this measurement, the location being checked at intervals of less than 10 seconds. A precession criterion is determined from the characteristics of this ray, and an alarm is set off if the criterion reaches a predetermined threshold value. Also claimed is a system for detecting the precession of a drilling element using the above method.

IPC 1-7

E21B 44/00

IPC 8 full level

E21B 44/00 (2006.01)

CPC (source: EP US)

E21B 44/00 (2013.01 - EP US)

Citation (search report)

  • [A] GB 2275283 A 19940824 - BAKER HUGHES INC [US]
  • [A] VANDIVER ET AL.: "Case studies of the bending vibration and whirling motion of drill collars", SPE/IADC DRILLING CONFERENCE, PAPER SPE 18652, 28 February 1989 (1989-02-28) - 3 March 1989 (1989-03-03), NEW ORLEANS, pages 282 - 290, XP002059285
  • [A] ZHANG ET AL.: "Precession of rotary drillstrings should be eliminated", SPE ADVANCED TECHNOLOGY SERIES, PAPER SPE 19360, vol. 3, no. 1, May 1995 (1995-05-01), RICHARDSON, TEXAS, USA, pages 23 - 28, XP002059286
  • [A] HENNEUSE: "Surface detection of vibrations and drilling optimization : field experience", IADC/SPE DRILLING CONFERENCE, PAPER SPE 23888, 18 February 1992 (1992-02-18) - 21 February 1992 (1992-02-21), NEW ORLEANS, pages 409 - 423, XP002059287
  • [PX] REY-FABRET ET AL.: "Detecting whirling behaviour of the drill string from surface measurements", SPE ANNUAL TECHNICAL CONFERENCE AND EXHIBITION, PAPER SPE 38587, 5 October 1997 (1997-10-05) - 8 October 1997 (1997-10-08), SAN ANTONIO, TEXAS, USA, pages 223 - 231, XP002059288

Designated contracting state (EPC)

GB IT NL

DOCDB simple family (publication)

EP 0887511 A1 19981230; EP 0887511 B1 20030903; CA 2240479 A1 19981225; CA 2240479 C 20071002; FR 2765264 A1 19981231; FR 2765264 B1 19990806; NO 982936 D0 19980624; NO 982936 L 19981228; US 5999891 A 19991207

DOCDB simple family (application)

EP 98401475 A 19980617; CA 2240479 A 19980623; FR 9707931 A 19970625; NO 982936 A 19980624; US 10352998 A 19980624