EP0196829A3 - Well tool - Google Patents

Well tool Download PDF

Info

Publication number
EP0196829A3
EP0196829A3 EP86302052A EP86302052A EP0196829A3 EP 0196829 A3 EP0196829 A3 EP 0196829A3 EP 86302052 A EP86302052 A EP 86302052A EP 86302052 A EP86302052 A EP 86302052A EP 0196829 A3 EP0196829 A3 EP 0196829A3
Authority
EP
European Patent Office
Prior art keywords
stuck
string
well
location
tool
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.)
Withdrawn
Application number
EP86302052A
Other languages
German (de)
French (fr)
Other versions
EP0196829A2 (en
Inventor
Cyril Rufus Sumner
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.)
Halliburton Co
Original Assignee
Halliburton Co
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 Halliburton Co filed Critical Halliburton Co
Publication of EP0196829A2 publication Critical patent/EP0196829A2/en
Publication of EP0196829A3 publication Critical patent/EP0196829A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/09—Locating or determining the position of objects in boreholes or wells, e.g. the position of an extending arm; Identifying the free or blocked portions of pipes

Abstract

The depth at which a string of pipe is stuck in a well borehole is determined using a tool suspended by a logging cable (22) and comprising a tool body (18) for running in the stuck well string, the body enclosing a first electromagnetic coil (50) connected with a suitable storage capacitor (38) and switch (36) for forming a strong magnetic field at a specified depth on the stuck well string. A second electromagnetic coil (48) is included in the tool and functions as a detector means. The detected signal is output to a suitable amplifier system and a recorder (34). Upon application of stress to the well string, the amplitude of magnetic marks above the stuck location will either be reduced or substantially erased; the electromagnetic marks below the stuck points will not be reduced, and the change in detected signals by the detector means indicates the location of the well string sticking and enables location of a free point in the string.
EP86302052A 1985-04-01 1986-03-20 Well tool Withdrawn EP0196829A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US71814585A 1985-04-01 1985-04-01
US718145 1991-06-20

Publications (2)

Publication Number Publication Date
EP0196829A2 EP0196829A2 (en) 1986-10-08
EP0196829A3 true EP0196829A3 (en) 1988-08-31

Family

ID=24884996

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86302052A Withdrawn EP0196829A3 (en) 1985-04-01 1986-03-20 Well tool

Country Status (2)

Country Link
EP (1) EP0196829A3 (en)
AU (1) AU5495186A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101517191B (en) * 2006-09-07 2013-02-13 桑德克斯有限公司 Method of and system for determining the free point in a drill pipe

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2897890B1 (en) 2006-02-27 2008-05-16 Jean Pierre Martin METHOD AND DEVICE FOR DETERMINING THE LOCATION OF A FIXATION POINT OF A ROD
FR2900193B1 (en) 2006-04-21 2008-06-20 Jean Pierre Martin METHOD AND APPARATUS FOR DETERMINING THE EXISTENCE AND LOCATION OF STRESS FORCES ON A ROD

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2902640A (en) * 1954-12-15 1959-09-01 Jack E Foster Detection of stuck point in wells
EP0019091A1 (en) * 1979-05-09 1980-11-26 Schlumberger Limited Method and apparatus for pipe inspection
US4440019A (en) * 1982-05-28 1984-04-03 Marshall W Ray Free point indicator
GB2158245A (en) * 1984-05-04 1985-11-06 Nl Industries Inc System for determining the free point of pipe stuck in a borehole

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2902640A (en) * 1954-12-15 1959-09-01 Jack E Foster Detection of stuck point in wells
EP0019091A1 (en) * 1979-05-09 1980-11-26 Schlumberger Limited Method and apparatus for pipe inspection
US4440019A (en) * 1982-05-28 1984-04-03 Marshall W Ray Free point indicator
GB2158245A (en) * 1984-05-04 1985-11-06 Nl Industries Inc System for determining the free point of pipe stuck in a borehole

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101517191B (en) * 2006-09-07 2013-02-13 桑德克斯有限公司 Method of and system for determining the free point in a drill pipe

Also Published As

Publication number Publication date
EP0196829A2 (en) 1986-10-08
AU5495186A (en) 1986-10-09

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Inventor name: SUMNER, CYRIL RUFUS