EP0039278B1 - Dispositif pour détecter le point de coincement des tiges dans un sondage - Google Patents

Dispositif pour détecter le point de coincement des tiges dans un sondage Download PDF

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Publication number
EP0039278B1
EP0039278B1 EP81400626A EP81400626A EP0039278B1 EP 0039278 B1 EP0039278 B1 EP 0039278B1 EP 81400626 A EP81400626 A EP 81400626A EP 81400626 A EP81400626 A EP 81400626A EP 0039278 B1 EP0039278 B1 EP 0039278B1
Authority
EP
European Patent Office
Prior art keywords
parts
body member
windings
angular
transformer
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.)
Expired
Application number
EP81400626A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0039278A1 (fr
Inventor
Pierre A. Moulin
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.)
Schlumberger NV
Services Petroliers Schlumberger SA
Schlumberger Ltd USA
Original Assignee
Schlumberger NV
Societe de Prospection Electrique Schlumberger SA
Schlumberger Ltd USA
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 NV, Societe de Prospection Electrique Schlumberger SA, Schlumberger Ltd USA filed Critical Schlumberger NV
Publication of EP0039278A1 publication Critical patent/EP0039278A1/fr
Application granted granted Critical
Publication of EP0039278B1 publication Critical patent/EP0039278B1/fr
Expired legal-status Critical Current

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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
    • 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

Definitions

  • the invention relates to devices used in soundings and more particularly to devices for detecting the point of jamming of a column of rods in a sounding.
  • a conventional method for determining the depth of the pinch point is to apply twists and pulls to the column at the surface and determine up to 'to what depth these deformations are transmitted.
  • a device is used which is lowered into the column at the end of a cable and placed at successive depths.
  • a conventional device for detecting the point of jamming comprises a body having an upper part and a lower part mounted so as to be movable by relative to each other according to limited displacements and upper and lower anchoring members mounted respectively on these upper and lower parts to immobilize each of the body parts in two zones longitudinally spaced from the column.
  • Electric motors controlled via the cable serve to move the anchoring members apart and bring them closer to the body and a sensor mounted between the parts of the body detects the relative movements of said parts when the column is elastically deformed by stresses applied on the surface. .
  • the invention relates to a sensor for detecting the point of jamming of the rods in a borehole which has good characteristics of precision and reliability and which makes it possible to separately detect the twists of the pulls with a low stiffness.
  • a device for detecting the point of stuck rods in a borehole comprises a body having two parts movable with respect to each other and separate detection means for detecting respectively the angular and longitudinal movements between body parts.
  • the angular detection means comprise: a first transformer having a primary winding secured to a first part of the body and supplied with periodic current to induce a first signal in a secondary winding secured to the second part of the body, a first of these windings comprising a radial coil, that is to say an axis perpendicular to said direction and the second winding comprising two coils also radial and arranged on either side of the first winding.
  • the first signal is sensitive to the angular displacements between the parts of the body but is insensitive to the longitudinal displacements between these parts.
  • the coils of the second winding are mounted with their parallel axes and the first part of the body is mounted angularly movable on either side of a median angular position for which the axis of the coil of the first winding is perpendicular to the axes of the coils of the second winding.
  • the longitudinal detection means comprise: a second transformer having a primary winding secured to the first part of the body and supplied with periodic current to induce a second signal in a secondary winding secured to the second part of the body, a first of these windings comprising a axial coil, that is to say an axis parallel to said direction and the second winding comprising two spaced axial coils longitudinally and partially surrounding said first winding.
  • the second signal is sensitive to the longitudinal displacements between the parts of the body but is insensitive to the angular displacements between these parts.
  • one of the parts of the body forms a sleeve inside which a chamber is formed which contains the transformers.
  • This chamber is filled with oil and means are provided to maintain the internal pressure of the chamber equal to that of the sounding, for example using a floating piston.
  • the device further comprises elastic means for opposing the weight of the lower part and pushing it upwards so that it can then move downward relative to the upper part after anchoring in the column of rods.
  • means are provided for bringing the first part of the body substantially to said middle position of the second transformer so that this first part can rotate relative to the second part in one direction or the other.
  • a jamming point detection device comprises a bottom device 10 suspended in a column of rods 11 at the end of a cable 12.
  • the rods 11 disposed in a borehole 13 are trapped by the formations at a point 14 whose depth is to be determined.
  • the rods are suspended on the surface in a known manner from a drilling tower (not shown) equipped with mechanisms making it possible to apply tensile and torsional forces to these rods.
  • the cable 12 comprises one or more electrical conductors connected to a surface device 15. This device is suitable for sending an electrical supply current and electrical control signals to the downhole device and for receiving the signals coming from this device. to process, display and save them.
  • the downhole apparatus 10 generally comprises an electronic section 20, an upper anchoring system 21, a sensor 22, a lower anchoring system 23.
  • the electronic section 20 is formed of a sealed envelope containing electronic circuits.
  • the sensor 22 is formed by a body 25 having an upper part 26 and a lower part 27 mounted movable relative to one another with limited displacements both longitudinally and angularly.
  • the upper 21 and lower 23 anchoring systems are respectively fixed to the upper 26 and lower 27 parts of the body in order to immobilize these two parts in two zones longitudinally spaced from the column of rods.
  • Each anchoring system can be of the type described in US Patent No. 3,686,943 already cited, with articulated arms adapted to move away from the body to come into abutment against the internal wall of the rods. These arms, which may be three in number, engage for example on an axial displacement control rod driven by an electric motor which transmits its movement to the rod by means of an endless screw.
  • Each anchoring system includes a motor controlled at will from the surface.
  • the sensor 22 provides signals representative of the relative displacements between the parts of the body when the rods are elastically deformed by stresses of tension or torsion applied to the surface. Following these constraints, the sensor 22 indicates a displacement between the parts of the body, only if the bottom apparatus is anchored above the point of jamming 14. By anchoring the apparatus 10 at various depths, it is therefore possible to find the one below which no more signal is obtained, that is to say the one which corresponds to the depth of the jamming point.
  • the sensor 22 is shown in more detail in FIG. 2.
  • the upper part 26 of the body is extended downwards by a mandrel 30 which can rotate and move longitudinally in a sleeve 31 which extends upwards the lower part 27.
  • the upper part 26 includes a tapping 32 allowing it to be fixed to the upper anchoring system 21, and connectors 33 fixed in isolation on the body to ensure suitable electrical connections with the top of the bottom appliance.
  • the senor comprises a first transformer formed by a primary fixed to the mandrel 30 and a secondary fixed to the sleeve 31.
  • the primary consists of a coil 35 whose axis is radial , that is to say perpendicular to the longitudinal direction XX 'of the device (see also Figure 3).
  • the secondary is formed by two coils 36 and 37 whose axes are also radial.
  • the two coils of the secondary are connected in series and when the primary is supplied with periodic current, the signal induced in the secondary is representative of the relative angular position of the mandrel 30 and of the sleeve 31.
  • the axis of the coil 35 of the primary is perpendicular to the common axis of the coils 36 and 37 high school.
  • the signal induced in the secondary is zero.
  • the coils 35, 36 and 37 are long enough in the direction of the direction XX ′ so that the limited longitudinal displacement of the mandrel 30 relative to the sleeve 31 does not modify the output signal of the angular displacement transformer.
  • the sensor 22 comprises a second transformer formed by a primary fixed to the mandrel 30 and a secondary fixed to the sleeve 31.
  • the primary consists of an axial coil 40, that is that is to say an axis parallel to the direction XX ′ and the secondary by two other axial coils 41 and 42 connected in opposition.
  • the coil 40 is placed on the mandrel so as to be centered halfway between the coils 41 and 42 when the sleeve 31 is in the high position relative to the mandrel 30 in order to provide a substantially zero signal in this position.
  • This second transformer symmetrical around the axis XX ′, is insensitive to the relative angular displacements of the two parts of the body.
  • the lower end of the mandrel 30 includes a flange 43 on which a spring 44 compressed between this flange and an internal shoulder of the sleeve 31 comes to bear.
  • This spring 44 is suitable for applying to the sleeve 31 an upwardly directed force slightly greater than the weight hanging from the lower part 27 of the device.
  • the lower part 27 of the body ends down at the end by a smaller diameter end on which is rotatably mounted a threaded ring 47 held in place by a stop 48.
  • This end has a housing in which is placed a support 50 for connectors 51 to make the appropriate electrical connections with the lower anchoring system 23.
  • the space between the mandrel 30 and the sleeve 31 forms a sealed chamber 52 closed upwards by an annular piston 53 mounted to slide on the mandrel. Seals 54 and 55 seal between the piston and the mandrel 30 and between the piston and the sleeve 31.
  • the chamber 52 is filled with hydraulic fluid and the pressure equalization piston 53 maintains the chamber at the pressure of the fluids of the survey. In this way the mandrel and the sleeve are not subjected to any longitudinal force due to the pressure of the drilling fluids.
  • the different coils are connected to the electronic section of the device by conductors such as 58, 59 connected to the connectors 33.
  • the apparatus further comprises means for substantially bringing the mandrel 30 to the median angular position for which the axis of the primary coil 35 is perpendicular to the common axis of the coils 36, 37.
  • These means comprise a window 56 cut out from the internal face of the sleeve 31.
  • the window 56 has two sides parallel to the longitudinal direction XX ′, a flat lower face and upper ramps converging upwards at a point located in the middle of the two parallel sides.
  • a guide key 57 integral with the mandrel 30 can move inside this window. Normally the key 57 is therefore held in abutment against the underside of the window 56 by the spring 44.
  • the longitudinal sides of the window 56 limit the angular displacement of the mandrel 30 relative to the sleeve 31.
  • the lower anchoring system 23 is anchored and the cable is pulled to bring the guide key 57 to the top of the window 56.
  • the mandrel which could have rotated until it abutted against the sides of the window is thus returned to the median angular position by the key 57 which slides along one of the upper ramps of the window 56.
  • the cable tension is then released and under the action of the spring 44, the key 57 returns to the bottom of window 56 while remaining substantially equidistant from its longitudinal sides.
  • the lower part of the body is, at this instant, in the high position relative to the upper part.
  • the angular displacement transformer is in the middle position and the coil 40 of the longitudinal displacement transformer is substantially centered on the midpoint between the coils 41 and 42 of the secondary.
  • the device is therefore ready to measure the elongation of the rods and their twists in one direction or the other.
  • a supply circuit 60 supplies a triangular periodic current at the frequency of 1000 Hz to the primary coils 35 and 40 which induce rectangular voltages in the secondary coils.
  • the secondary coils 36 and 37 of the angular displacement detector transformer are connected in series to the input terminals of a differential amplifier 61.
  • the output signal of the amplifier 61 is rectified in phase by a synchronous detector 62 having for reference the signal at 1000 Hz from the power supply 60.
  • the output signal from the synchronous detector 62 is a direct voltage V R linear function of the angular displacement of the mandrel 30 in the sleeve 31.
  • This signal V R whose sign indicates the direction of rotation is transmitted by the cable 12 to the surface apparatus 15 after having been converted, if necessary, by means of an appropriate transmission system.
  • the secondary coils 41 and 42 of the longitudinal displacement detector transformer are connected in opposition to the terminals of a differential amplifier 63, the output of which is connected to a synchronous detector 64.
  • the reference of the detector 64 is supplied by the power supply 60.
  • the signal output V L of the synchronous detector 64 is a DC voltage proportional to the longitudinal displacement of the mandrel 30 relative to the sleeve 31. This signal V L is transmitted to the surface via the cable 12 like the signal V R.
  • the apparatus is assembled as shown in FIG. 1 and it is lowered inside the column of rods 11 to the depth where it is desired to determine whether these rods are free.
  • the lower system 23 is anchored and the cable 12 is pulled to return the angular displacement detector transformer to the midpoint. Then close the lower anchoring system and anchor the device again, starting with the upper anchoring system 21. This ensures that the weight of the top of the device and the cable does not come compress sensor 22.
  • Torsional and tensile stresses are then applied to the surface of the rod column while displaying and recording the longitudinal and angular displacement signals of the sensor. If these signals indicate that the rods are free at the depth where the device is located, the above operations are repeated at other depths until the jamming point 14 is determined for which the sensor 22 no longer indicates displacements. If one wants to unscrew the rods above the jamming point, the sensor 22 makes it possible to detect whether a unscrewing torque has indeed been transmitted to the desired depth, thanks to the first transformer which is only sensitive to rotation.
  • each transformer can be the subject of numerous variants.
  • the primary and secondary of each transformer are interchangeable.
  • the sleeve can be secured to the upper anchor and the mandrel to the lower anchor.
  • the two opposing coils can be fixed to the mandrel.
  • the median focusing system can be achieved by other means etc.

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  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Geophysics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geophysics And Detection Of Objects (AREA)
EP81400626A 1980-04-30 1981-04-21 Dispositif pour détecter le point de coincement des tiges dans un sondage Expired EP0039278B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8009751A FR2481737A1 (fr) 1980-04-30 1980-04-30 Dispositif pour detecter le point de coincement des tiges dans un sondage
FR8009751 1980-04-30

Publications (2)

Publication Number Publication Date
EP0039278A1 EP0039278A1 (fr) 1981-11-04
EP0039278B1 true EP0039278B1 (fr) 1983-08-31

Family

ID=9241523

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81400626A Expired EP0039278B1 (fr) 1980-04-30 1981-04-21 Dispositif pour détecter le point de coincement des tiges dans un sondage

Country Status (12)

Country Link
US (1) US4351186A (enrdf_load_stackoverflow)
EP (1) EP0039278B1 (enrdf_load_stackoverflow)
JP (1) JPS5733692A (enrdf_load_stackoverflow)
AU (1) AU538886B2 (enrdf_load_stackoverflow)
BR (1) BR8102371A (enrdf_load_stackoverflow)
CA (1) CA1163693A (enrdf_load_stackoverflow)
DE (1) DE3160808D1 (enrdf_load_stackoverflow)
EG (1) EG14617A (enrdf_load_stackoverflow)
FR (1) FR2481737A1 (enrdf_load_stackoverflow)
MX (1) MX149080A (enrdf_load_stackoverflow)
MY (1) MY8500057A (enrdf_load_stackoverflow)
NO (1) NO811334L (enrdf_load_stackoverflow)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2497266A1 (fr) * 1980-12-31 1982-07-02 Schlumberger Prospection Dispositif pour detecter le point de coincement des tiges dans un sondage
US4444050A (en) * 1981-11-18 1984-04-24 Halliburton Company Freepoint indicator
US4515010A (en) * 1983-03-25 1985-05-07 Nl Industries, Inc. Stuck point indicating device with linear sensing means
US4708204A (en) * 1984-05-04 1987-11-24 Nl Industries, Inc. System for determining the free point of pipe stuck in a borehole
DE3605036A1 (de) * 1985-04-10 1986-10-16 Gerd 3167 Burgdorf Hörmansdörfer Verfahren und vorrichtung zum bestimmen des verklemmungspunktes eines stranges in einem bohrloch
US5520245A (en) * 1994-11-04 1996-05-28 Wedge Wireline Inc Device to determine free point
US5585555A (en) * 1995-01-24 1996-12-17 Geokon, Inc. Borehole strainmeter
US7389183B2 (en) * 2001-08-03 2008-06-17 Weatherford/Lamb, Inc. Method for determining a stuck point for pipe, and free point logging tool
US7383876B2 (en) * 2001-08-03 2008-06-10 Weatherford/Lamb, Inc. Cutting tool for use in a wellbore tubular
US6851476B2 (en) * 2001-08-03 2005-02-08 Weather/Lamb, Inc. Dual sensor freepoint tool
US7004021B2 (en) * 2004-03-03 2006-02-28 Halliburton Energy Services, Inc. Method and system for detecting conditions inside a wellbore
US8797033B1 (en) 2007-10-05 2014-08-05 Microline Technology Corporation Stress detection tool using magnetic barkhausen noise
US8035374B1 (en) 2007-10-05 2011-10-11 Microline Technology Corporation Pipe stress detection tool using magnetic barkhausen noise
US7878242B2 (en) * 2008-06-04 2011-02-01 Weatherford/Lamb, Inc. Interface for deploying wireline tools with non-electric string
US10444194B2 (en) 2016-04-26 2019-10-15 Quanta Associates, L.P. Method and apparatus for material identification of pipelines and other tubulars
US10364665B2 (en) 2016-07-19 2019-07-30 Quanta Associates, L.P. Method and apparatus for stress mapping of pipelines and other tubulars
NO343697B1 (en) * 2017-05-23 2019-05-13 Altus Intervention Tech As Method and apparatus for performing a survey of tubing which is stuck in a borehole, e.g. for determining a free point
WO2019123466A1 (en) * 2017-12-20 2019-06-27 G.M Afcon Security Technologies Limited Partnership Remote deployment of a device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3153339A (en) * 1961-04-17 1964-10-20 Alexander Apparatus for sensing well pipe movement

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2530309A (en) * 1946-01-15 1950-11-14 Philip W Martin Device for determining relative movements of parts in wells
US2550964A (en) * 1948-10-01 1951-05-01 Mccullough Tool Company Device for determining point at which pipe is stuck in a well
US3233170A (en) * 1961-03-01 1966-02-01 Houston Oil Field Mat Co Inc Magnetic stuck pipe locator and detonator using a single line to transmit signals
US3686943A (en) * 1970-12-10 1972-08-29 Go Intern Inc Measuring apparatus for attaching to a conduit in a borehole
US3942373A (en) * 1974-04-29 1976-03-09 Homco International, Inc. Well tool apparatus and method
US4105071A (en) * 1977-09-19 1978-08-08 Schlumberger Technology Corporation Methods and apparatus for determining the stuck point of a conduit in a borehole
FR2430003A1 (fr) * 1978-06-30 1980-01-25 Schlumberger Prospection Dispositif pour mesurer la tension de fond appliquee a un cable
JPS5527974A (en) * 1978-08-21 1980-02-28 Igarashi Kogyo Kk Space factor checker for underground pipe
US4207765A (en) * 1978-11-14 1980-06-17 Kiff Edville A Method and apparatus for determining the point at which pipe is stuck in a well
US4289024A (en) * 1979-12-26 1981-09-15 Gearhart Industries, Inc. Well casing free-point indicator

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3153339A (en) * 1961-04-17 1964-10-20 Alexander Apparatus for sensing well pipe movement

Also Published As

Publication number Publication date
EG14617A (en) 1985-03-31
AU6951481A (en) 1981-11-05
CA1163693A (en) 1984-03-13
JPS6321798B2 (enrdf_load_stackoverflow) 1988-05-09
FR2481737B1 (enrdf_load_stackoverflow) 1983-10-14
EP0039278A1 (fr) 1981-11-04
MX149080A (es) 1983-08-18
AU538886B2 (en) 1984-08-30
US4351186A (en) 1982-09-28
JPS5733692A (en) 1982-02-23
FR2481737A1 (fr) 1981-11-06
MY8500057A (en) 1985-12-31
NO811334L (no) 1981-11-02
DE3160808D1 (en) 1983-10-06
BR8102371A (pt) 1981-12-22

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