EP0887511A1 - Verfahren und Vorrichtung zur Erfassung der Präzession eines Bohrstrangelementes - Google Patents

Verfahren und Vorrichtung zur Erfassung der Präzession eines Bohrstrangelementes Download PDF

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Publication number
EP0887511A1
EP0887511A1 EP98401475A EP98401475A EP0887511A1 EP 0887511 A1 EP0887511 A1 EP 0887511A1 EP 98401475 A EP98401475 A EP 98401475A EP 98401475 A EP98401475 A EP 98401475A EP 0887511 A1 EP0887511 A1 EP 0887511A1
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EP
European Patent Office
Prior art keywords
measurement
precession
line
significant
well
Prior art date
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EP98401475A
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English (en)
French (fr)
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EP0887511B1 (de
Inventor
Isabelle Rey-Fabret
Claude Mabile
Nathalie Oudin
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IFP Energies Nouvelles IFPEN
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IFP Energies Nouvelles IFPEN
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    • 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

Definitions

  • the present invention relates to the field of drilling techniques for oil and gas wells, and more specifically detection techniques of the precession during drilling of the element of the drill string commonly called "BHA" for "Bottom Hole Assembly".
  • BHA Bottom Hole Assembly
  • BHA is subject to precession when it undergoes a movement proper rotation due in particular to bending. This clean movement is influenced by drilling parameters (weight on the tool, rotation speed, etc.) and geometric parameters (dimensions of the BHA constituents, tool diameter, hole path, type of terrain, etc.). He is considered as a serious malfunction because it prevents the smooth running of the drilling and can even cause significant material damage, particularly to elements of the BHA.
  • the measurements acquired at the surface can be a function of the couple S (t) and of the voltage V (t) at the top of the drill rods.
  • the average jump can be identified from the torque measurement S (t) and the location of said significant line from the measurement of the voltage V (t).
  • ], ⁇ being the average speed of the lining and ⁇ b - ⁇ R c / ( R b - R c ) where Rc is the radius of said element in precession and Rb is the radius of the well, and said skate can have a power at least greater than 65% of the main maximum.
  • the acquisition means may include measurement sensors related to the torque S (t) and to the voltage V (t) at the upper end of the packing.
  • the torque S (t) can be measured by means of the motorization in lining rotation and tension can be measured from the tension of the cable.
  • precession can be defined as movement of the drill collar when the contact of the drill collar against the walls of the well generates an orbital movement of one or more sections of the BHA. It is therefore a composition of two rotational movements.
  • the purpose of detection is to determine ⁇ , to deduce in which precession conditions we find our by studying the value of s, and of trigger an alarm if necessary.
  • Several alarm levels can be defined according to the value of s.
  • the factors influencing precession are essentially the operational drilling parameters (rotation speed, tool weight, type of mud %), the geometry of the whole (dimension of the well, inclination of the well, %) and the type of rock drilled.
  • Precession is therefore particularly present in wells or parts of vertical or slightly deviated wells.
  • the main objective of the invention is to detect precession from only signals available on the surface. Now, the bending phenomena are not very sensitive on the surface because on the one hand, there is such a dissipation bending waves (structural and due to the well fluid) that the latter tend to to disappear before reaching the surface, and on the other hand, the well is a bad guide for bending waves.
  • Figure 1 depicts the drilling of a well 1 using a surface 2 comprising a tower 3 and suspension means 4 to which is attached to the drill string 5.
  • the drill string 5 is composed as it is known in the art of drilling, by a drilling tool 6, a set of rods 7 in which one or more stabilizers 8 can be integrated, drill rods 9 screwed together to make the connection mechanical with the injection head, for example motorized 10, suspended from the lifting means 4. It is the precession of part of BHA 7 which concerns the present invention.
  • a connector 11 includes sensors sensitive to the vibration of the train stems.
  • the vibrations recorded can be torsion, bending, tension, or even pressure in the drilling fluid injected through the head 10.
  • the sensors are sensitive to the torque and at the tension at the upper end of the rods 9.
  • suitable sensors can be installed in the setting means gasket rotation: rotary table or motorized injection head 10.
  • the tension can also be measured from the tension of a strand of the cable drilling.
  • Means of acquisition and processing 12 of the corresponding signals to the vibration of the torque and the surface tension, respectively (S (t) and V (t), are in connection with the instrumented fitting 11, either by a cable 13 or by radio wave received by the antenna 14.
  • a drilling control cabin 15 receives, either by radio means 16 or by cable 17, the information from the acquisition and processing means 12. This information can trigger signaling means 18 of the alarm type, by example of lights of different colors depending on a specific level of precession.
  • the automatic data processing is done according to the following scheme:
  • ⁇ represents the instantaneous rotation speed imparted to the drilling assembly by the engine.
  • t am is the time when an average jump of the signal studied in time is detected, here the surface torque S (t).
  • An example of automatic processing for detecting the average jump of the signal processed in time (for example here, the couple).
  • the CUSUM algorithm makes it possible to give precisely the time t am when there is a change in the mean of the signal.
  • C ⁇ / ⁇ b, where ⁇ is the proper rotation speed of the BHA in its precession movement.
  • Figures 2 and 3 illustrate two more detailed algorithms of the automatic data processing and alarm triggering based on the principles of precession detection described above.
  • Block 40 represents the frequency treatments on upstream and downstream windows with respect to t am .
  • an estimate of the spectrum of the front torque is calculated and after the average jump by conventional signal processing methods (for example: averaged periodograms, high resolution methods, ).
  • Convention signal processing methods for example: averaged periodograms, high resolution methods, .
  • the alarm threshold is taken at 0.6. If C is greater than 0.6, an alarm is triggered to prevent the significant risk of having a dysfunction close to the retrograde type.
  • FIG. 3 shows another example of automatic processing in which the monitoring of the mean and the spectral content is done in parallel over time (block 30 ′).
  • the search for a significant line is then triggered (block 40 ').
  • the same functionality for triggering an alarm is then found.
  • Figures 4a, 4b, 5a and 5b are comparative examples of what is can actually measure at the BHA level and what we measure in area.
  • Figure 4a is the recording of the bending recorded at the level drill collars, for example in fitting 20 ( Figure 1). Such means of measurement are for example described in document EP-B1-0558379, cited here in reference. We note the average jump referenced 21.
  • FIG. 4b gives the spectrum corresponding to the signal of the moment of bending at the BHA level.
  • the continuous curve 23 corresponds to the spectrum in upstream of the mean jump, i.e. without whirling
  • the dotted curve 24 corresponds to the spectrum after the average jump, i.e. in whirling.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (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)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Earth Drilling (AREA)
  • Drilling And Boring (AREA)
EP98401475A 1997-06-25 1998-06-17 Verfahren und Vorrichtung zur Erfassung der Präzession eines Bohrstrangelementes Expired - Lifetime EP0887511B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9707931A FR2765264B1 (fr) 1997-06-25 1997-06-25 Methode et systeme de detection de la precession d'un element d'une garniture de forage
FR9707931 1997-06-25

Publications (2)

Publication Number Publication Date
EP0887511A1 true EP0887511A1 (de) 1998-12-30
EP0887511B1 EP0887511B1 (de) 2003-09-03

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP98401475A Expired - Lifetime EP0887511B1 (de) 1997-06-25 1998-06-17 Verfahren und Vorrichtung zur Erfassung der Präzession eines Bohrstrangelementes

Country Status (5)

Country Link
US (1) US5999891A (de)
EP (1) EP0887511B1 (de)
CA (1) CA2240479C (de)
FR (1) FR2765264B1 (de)
NO (1) NO982936L (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9824248D0 (en) 1998-11-06 1998-12-30 Camco Int Uk Ltd Methods and apparatus for detecting torsional vibration in a downhole assembly
US7251590B2 (en) * 2000-03-13 2007-07-31 Smith International, Inc. Dynamic vibrational control
US9482055B2 (en) 2000-10-11 2016-11-01 Smith International, Inc. Methods for modeling, designing, and optimizing the performance of drilling tool assemblies
US8589124B2 (en) * 2000-08-09 2013-11-19 Smith International, Inc. Methods for modeling wear of fixed cutter bits and for designing and optimizing fixed cutter bits
US7003439B2 (en) * 2001-01-30 2006-02-21 Schlumberger Technology Corporation Interactive method for real-time displaying, querying and forecasting drilling event and hazard information

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2275283A (en) * 1993-02-19 1994-08-24 Baker Hughes Inc Detection of bit whirl

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2217012B (en) * 1988-04-05 1992-03-25 Forex Neptune Sa Method of determining drill bit wear
US5419405A (en) * 1989-12-22 1995-05-30 Patton Consulting System for controlled drilling of boreholes along planned profile
US5220963A (en) * 1989-12-22 1993-06-22 Patton Consulting, Inc. System for controlled drilling of boreholes along planned profile
US5159577A (en) * 1990-10-09 1992-10-27 Baroid Technology, Inc. Technique for reducing whirling of a drill string
US5058077A (en) * 1990-10-09 1991-10-15 Baroid Technology, Inc. Compensation technique for eccentered MWD sensors
US5313829A (en) * 1992-01-03 1994-05-24 Atlantic Richfield Company Method of determining drillstring bottom hole assembly vibrations
FR2720440B1 (fr) * 1994-05-24 1996-07-05 Inst Francais Du Petrole Méthode et système de transmission d'un signal de forage.
FR2720439B1 (fr) * 1994-05-24 1996-07-05 Inst Francais Du Petrole Méthode et système d'analyse du comportement d'une garniture de forage.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2275283A (en) * 1993-02-19 1994-08-24 Baker Hughes Inc Detection of bit whirl

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
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 *
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 *
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 *
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 *

Also Published As

Publication number Publication date
NO982936L (no) 1998-12-28
US5999891A (en) 1999-12-07
NO982936D0 (no) 1998-06-24
CA2240479A1 (fr) 1998-12-25
EP0887511B1 (de) 2003-09-03
FR2765264A1 (fr) 1998-12-31
FR2765264B1 (fr) 1999-08-06
CA2240479C (fr) 2007-10-02

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