CA2095583A1 - Method for detecting drillstring washouts - Google Patents

Method for detecting drillstring washouts

Info

Publication number
CA2095583A1
CA2095583A1 CA002095583A CA2095583A CA2095583A1 CA 2095583 A1 CA2095583 A1 CA 2095583A1 CA 002095583 A CA002095583 A CA 002095583A CA 2095583 A CA2095583 A CA 2095583A CA 2095583 A1 CA2095583 A1 CA 2095583A1
Authority
CA
Canada
Prior art keywords
drillstring
series
detecting
development
determining
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002095583A
Other languages
French (fr)
Other versions
CA2095583C (en
Inventor
Mohamed Damak
Dominic Patrick Joseph Mccann
David Brian White
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Varco IP Inc
Original Assignee
Schlumberger Technology Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schlumberger Technology Corp filed Critical Schlumberger Technology Corp
Publication of CA2095583A1 publication Critical patent/CA2095583A1/en
Application granted granted Critical
Publication of CA2095583C publication Critical patent/CA2095583C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B44/00—Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/08—Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

A method of detecting a drillstring washout during an operation involving the addition or removal of pipes from the drillstring such as back reaming, comprising: a) performing at least one such operation and determining by hydraulic coefficient k from the relationship P = kQ a, where Q is the flow rate, P is the standpipe pressure and a is the flow exponent, from each pipe added or removed, so as to derive a series of values indicating the development of k for said operations, and b) on subsequent operations, determining k and comparing the determined values with the series obtained previously, a drillstring washout being detected when the determined value of k falls substantially below the corresponding value of k in the series. The trend in the development of k can be calculated and used to determine if an anomaly exists in the determined value of k.
CA002095583A 1992-05-23 1993-05-05 Method for detecting drillstring washouts Expired - Fee Related CA2095583C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9211048.5 1992-05-23
GB9211048A GB2267300B (en) 1992-05-23 1992-05-23 Method for detecting drillstring washouts

Publications (2)

Publication Number Publication Date
CA2095583A1 true CA2095583A1 (en) 1993-11-24
CA2095583C CA2095583C (en) 2004-08-10

Family

ID=10715965

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002095583A Expired - Fee Related CA2095583C (en) 1992-05-23 1993-05-05 Method for detecting drillstring washouts

Country Status (5)

Country Link
EP (1) EP0572055B1 (en)
CA (1) CA2095583C (en)
DE (1) DE69309149D1 (en)
GB (1) GB2267300B (en)
NO (1) NO304710B1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1637695A1 (en) * 2000-09-22 2006-03-22 Weatherford/Lamb, Inc. Methods and apparatus for remote monitoring and control.
US7694558B2 (en) * 2008-02-11 2010-04-13 Baker Hughes Incorporated Downhole washout detection system and method
US8170800B2 (en) 2009-03-16 2012-05-01 Verdande Technology As Method and system for monitoring a drilling operation
US8381838B2 (en) 2009-12-31 2013-02-26 Pason Systems Corp. System and apparatus for directing the drilling of a well
US20150184504A1 (en) * 2012-06-22 2015-07-02 Schlumberger Technology Corporation Detecting a Drill String Washout Event
US11313220B1 (en) * 2021-02-17 2022-04-26 Saudi Arabian Oil Company Methods for identifying drill string washouts during wellbore drilling

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3646808A (en) * 1970-08-28 1972-03-07 Loren W Leonard Method for automatically monitoring and servicing the drilling fluid condition in a well bore
US4188624A (en) * 1978-06-30 1980-02-12 Nl Industries, Inc. Method and apparatus for monitoring fluid flow through a drill string
US4346594A (en) * 1980-11-14 1982-08-31 Owings Allen J Method for locating the depth of a drill string washout or lost circulation zone
US4430892A (en) * 1981-11-02 1984-02-14 Owings Allen J Pressure loss identifying apparatus and method for a drilling mud system
US4941951A (en) * 1989-02-27 1990-07-17 Anadrill, Inc. Method for improving a drilling process by characterizing the hydraulics of the drilling system

Also Published As

Publication number Publication date
GB9211048D0 (en) 1992-07-08
EP0572055B1 (en) 1997-03-26
DE69309149D1 (en) 1997-04-30
GB2267300A (en) 1993-12-01
NO931863L (en) 1993-11-24
GB2267300B (en) 1995-08-02
CA2095583C (en) 2004-08-10
EP0572055A1 (en) 1993-12-01
NO931863D0 (en) 1993-05-21
NO304710B1 (en) 1999-02-01

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed