EP0069019B1 - Dispositif de perforation pour sondage - Google Patents

Dispositif de perforation pour sondage Download PDF

Info

Publication number
EP0069019B1
EP0069019B1 EP82401194A EP82401194A EP0069019B1 EP 0069019 B1 EP0069019 B1 EP 0069019B1 EP 82401194 A EP82401194 A EP 82401194A EP 82401194 A EP82401194 A EP 82401194A EP 0069019 B1 EP0069019 B1 EP 0069019B1
Authority
EP
European Patent Office
Prior art keywords
charge
support
casing
perforation device
positioning
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
EP82401194A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0069019A1 (fr
Inventor
Michel Bosse Platiere
Gérard Bouguyon
Jean Lavigne
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 EP0069019A1 publication Critical patent/EP0069019A1/fr
Application granted granted Critical
Publication of EP0069019B1 publication Critical patent/EP0069019B1/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
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/11—Perforators; Permeators
    • E21B43/119—Details, e.g. for locating perforating place or direction
    • 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
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/11—Perforators; Permeators
    • E21B43/116—Gun or shaped-charge perforators
    • E21B43/117—Shaped-charge perforators

Definitions

  • the invention relates to perforation devices used in soundings and more particularly to a perforation device used through a production column and carrying encapsulated charges oriented in at least one direction.
  • the spacing is then minimal between the casing and the front face of the charges, this position providing the best perforation performance.
  • the perforation device described in US Pat. No. 3,965,993 is used commercially with a magnetic positioning system placed at the head of the device.
  • This system is formed by permanent magnets arranged on the side of the support bar to apply the front face of the bar against the casing.
  • the strength of the magnets may not be sufficient to correctly apply the support bar against the casing.
  • This application of the bar against the casing may be incorrect if the magnets have lost their strength or in the case of a large number of loads placed on a long support.
  • the addition of another magnetic positioning system at the bottom of the support is not possible because the debris of the load envelopes would agglomerate after the shooting on this magnetic member causing risks of jamming during the ascent to the surface of the remaining load bar and covers.
  • the object of the invention relates to an improved perforation device whose positioning is improved and which presents reduced risks of jamming.
  • the device comprises the characteristics mentioned in claim 1.
  • the rounded profile is of generally complementary shape, seen in a transverse plane, to said contact surface between the load and the casing.
  • the positioning member is fixed to a receiving load located at the bottom of the support.
  • Other identical positioning members can be fixed on receiving loads located at determined intervals along the support.
  • the external profile of the positioning member is substantially circular and eccentric with respect to the center of gravity of the device. In such a way that, in deviated soundings, the device rocks by gravity on this external profile towards the equilibrium position. .
  • the positioning member is a ring of substantially spherical external surface and comprising elastic fingers adapted to engage by snap-fastening on the receiving load.
  • the fingers are produced by cutting out regularly distributed radial slots in the crown. Multiple fingers of small width are thus obtained which break into small elements during detonation.
  • These positioning members are particularly advantageous in the case of devices comprising a bar-shaped support having a front face adapted to be applied against one side of the borehole and a rear face against which the loads are fixed from the front.
  • a perforation device 10 is suspended in a borehole 11 at the end of an electric cable 12.
  • the borehole 11 is fitted with a casing 13 surrounded by a ring of cement 14 and a production column 15 fixed to its lower part, in a packer 16.
  • the cable 12 is wound on the surface on a winch (not shown) which makes it possible to move the device 10 along the borehole.
  • the cable 12 generally comprises a single insulated conductor connected to surface equipment (not shown) capable of supplying electric current for igniting the perforation device.
  • the perforation device 10 connected to a cable head 17 comprises a conventional detector of casing joints 20, a magnetic positioning system 21 and a support 22 including, between a head 23 and a lower end piece 24, one or more bars 25 fixed end to end.
  • Encapsulated shaped charges 26 are fixed at regular intervals along the internal face of the bars 25 so that their axes are oriented in the same direction, perpendicular to the longitudinal direction of the bars.
  • the magnetic positioning system 21 comprises permanent magnets placed on one side of the system to apply the external face of the bars 25 against the wall of the casing.
  • the charges are fired by means of a detonating cord 27 which passes through a passage at the rear of each. charge.
  • the upper end of the cord 27 is connected to an electric detonator 30 fixed to the bar 25.
  • the electric conductors of the detonator 30 are connected to the head 23 so as to allow the sending of an electric firing current in this detonator from the surface via cable 12.
  • each charge comprises at l 'before a thread 31 which is screwed into a tapped hole in the bar 25.
  • a passage 32 for the detonating cord 27 At the rear part of each charge is made a passage 32 for the detonating cord 27.
  • the convex front face 33 of the bar 25 is intended to come s' apply against the inside of the casing.
  • the arrow P ′ represents the component of the weight of the perforating device in the cross section, this component being applied to the center of gravity G '. It can be seen that the support base AB of the device on the casing is wide so that neither the component P 'nor the torque due to the magnetic positioning system has the effect of tilting the device around the longitudinal direction towards the correct firing position for which the axis XX 'is directed downwards. In the device of the invention, incorrect positions are avoided because such tilting is possible.
  • the perforation device 10 comprises at least one positioning crown 35 (FIG. 1) fixed on a receiving load located at the lower part of the support 22.
  • Other identical positioning crowns such as 36 are fixed on loads receptors located at regular intervals along the support, for example at the bottom of each bar 25.
  • the crown 35 is shown in more detail in FIGS. 3 and 4.
  • the crown 35 is fixed by snap-fastening to a receiving charge 26 after screwing this charge onto a bar 25 but before the detonating cord 27 is put in place.
  • the same conventions "front and" rear defined with respect to the axis XX 'previously mentioned, will be used for the load and the crown assuming the latter snapped onto the load.
  • the crown 35 has a spherical outer surface 40 whose center C is substantially coincident with the center of curvature of the convex front face 33 of the bar 25.
  • This crown comprises an annular rear portion 41 delimited towards the exterior by a flat surface 42 and extending forwards by a recessed part 43 which surrounds the load 26.
  • the annular part 41 of the crown has a frustoconical internal surface 44 which bears on a rear shoulder of the load 26 The cutting of this annular part allows the rear part of the charge to protrude from the crown, thus leaving uncovered the passage 32 of the detonating cord.
  • radial slots 45 regularly distributed around the crown. These slots 45 open from the front of the crown to the flat surfaces 49 of the rear annular part. These radial slots 45 form between them eight fingers 46 capable of deviating elastically from the center C during the latching.
  • the elastic fingers 46 have at their ends lugs 47 adapted to engage in a recessed portion of the load cover 26.
  • the lugs 47 have inclined surfaces 48 which allow the introduction of the crown 35 on the receiving load 26 spreading the fingers 46.
  • the perforation device 10 takes, in the borehole, an incorrect position similar to that of FIG. 2, the part of this device which comes to bear against the casing is no longer formed by a broad base AB but by the external profile rounded positioning rings 35 and 36.
  • the support base is then practically punctual and a very low torque due to the magnetic system 21 is enough to tilt the device to the correct position for which the front face 33 is pressing against one side casing with axes XX 'perpendicular to this side.
  • the center of gravity of the device is located at a point G situated forward relative to the center C of the external surface.
  • the circular external profile of a crown 35 is eccentric rearward relative to the center of gravity G. Consequently, in a borehole inclined relative to the vertical, the radial component P of the weight is sufficient, by itself, to tilt the perforation device, on this circular profile, towards the equilibrium position indicated in FIG. 3. In fact, this force of gravity is added to the magnetic force of the positioning system 21 to bring back the perforating device in the correct position.
  • crowns 35 and 36 only slightly increase the amount of debris left in the borehole. Indeed, these crowns are few and represent a small amount of material. These crowns are made of the same steel, breaking into small elements, as that used for the envelopes of loads. The large number of radial slots 45 made in the crown further reduces the size of the debris.
  • the external shape of the crown is not necessarily spherical and one could design positioning elements with a cylindrical external shape provided that, in cross section, that is to say perpendicular to the longitudinal direction, the external profile is rounded appropriately.

Landscapes

  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Drilling Tools (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
EP82401194A 1981-06-30 1982-06-28 Dispositif de perforation pour sondage Expired EP0069019B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8112860A FR2508538A1 (fr) 1981-06-30 1981-06-30 Dispositif de perforation pour sondage
FR8112860 1981-06-30

Publications (2)

Publication Number Publication Date
EP0069019A1 EP0069019A1 (fr) 1983-01-05
EP0069019B1 true EP0069019B1 (fr) 1985-09-18

Family

ID=9260036

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82401194A Expired EP0069019B1 (fr) 1981-06-30 1982-06-28 Dispositif de perforation pour sondage

Country Status (12)

Country Link
US (1) US4768597A (enrdf_load_stackoverflow)
EP (1) EP0069019B1 (enrdf_load_stackoverflow)
JP (1) JPS587090A (enrdf_load_stackoverflow)
AR (1) AR230667A1 (enrdf_load_stackoverflow)
AU (1) AU558006B2 (enrdf_load_stackoverflow)
BR (1) BR8203681A (enrdf_load_stackoverflow)
CA (1) CA1177748A (enrdf_load_stackoverflow)
DE (1) DE3266378D1 (enrdf_load_stackoverflow)
EG (1) EG15917A (enrdf_load_stackoverflow)
FR (1) FR2508538A1 (enrdf_load_stackoverflow)
NO (1) NO822217L (enrdf_load_stackoverflow)
OA (1) OA07135A (enrdf_load_stackoverflow)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5033553A (en) * 1990-04-12 1991-07-23 Schlumberger Technology Corporation Intra-perforating gun swivel
US5564499A (en) * 1995-04-07 1996-10-15 Willis; Roger B. Method and device for slotting well casing and scoring surrounding rock to facilitate hydraulic fractures
US5964294A (en) * 1996-12-04 1999-10-12 Schlumberger Technology Corporation Apparatus and method for orienting a downhole tool in a horizontal or deviated well
GB2332920B (en) * 1997-05-03 2002-04-17 Ocre Perforating apparatus and method
CA2259776C (en) * 1999-01-21 2001-07-31 Ian B. Zeer Magnetic assembly for use with a downhole casing perforator
CA2381772C (en) 1999-07-22 2006-05-02 Schlumberger Technology Corporation Components and methods for use with explosives
US20030001753A1 (en) * 2001-06-29 2003-01-02 Cernocky Edward Paul Method and apparatus for wireless transmission down a well
WO2003002849A1 (en) 2001-06-29 2003-01-09 Shell Internationale Research Maatschappij B.V. Method and apparatus for detonating an explosive charge
US6557636B2 (en) 2001-06-29 2003-05-06 Shell Oil Company Method and apparatus for perforating a well
US6679327B2 (en) 2001-11-30 2004-01-20 Baker Hughes, Inc. Internal oriented perforating system and method
US6962202B2 (en) * 2003-01-09 2005-11-08 Shell Oil Company Casing conveyed well perforating apparatus and method
CN101220739B (zh) * 2007-01-12 2011-07-20 中国石油集团川庆钻探工程有限公司测井公司 油气井用动态负压装置
US7934558B2 (en) * 2009-03-13 2011-05-03 Halliburton Energy Services, Inc. System and method for dynamically adjusting the center of gravity of a perforating apparatus

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2833213A (en) * 1951-04-13 1958-05-06 Borg Warner Well perforator
US2947251A (en) * 1952-10-09 1960-08-02 Borg Warner Shaped-charge well perforator
US3110257A (en) * 1958-03-05 1963-11-12 Schlumberger Well Surv Corp Well perforating method and apparatus
US3153277A (en) * 1960-04-21 1964-10-20 Schlumberger Well Surv Corp Method of manufacturing a cylindrical magnetic orienting device
US3365032A (en) * 1966-06-28 1968-01-23 Lord Corp Viscous and elastomer damped bearing support
US3405769A (en) * 1967-02-28 1968-10-15 Schlumberger Technology Corp Well perforating apparatus
US3707195A (en) * 1971-07-14 1972-12-26 Schlumberger Technology Corp Apparatus for perforating earth formations
FR2285593A1 (fr) * 1974-09-20 1976-04-16 Schlumberger Inst System Support de charges creuses pour la mise en production des forages et notamment des puits a gaz
US4153118A (en) * 1977-03-28 1979-05-08 Hart Michael L Method of and apparatus for perforating boreholes
US4269278A (en) * 1977-10-17 1981-05-26 Peabody Vann Method and apparatus for completing a slanted wellbore
US4273047A (en) * 1978-12-11 1981-06-16 Jet Research Center, Inc. Apparatus for perforating a well and its method of assembly

Also Published As

Publication number Publication date
FR2508538B1 (enrdf_load_stackoverflow) 1984-06-15
US4768597A (en) 1988-09-06
EP0069019A1 (fr) 1983-01-05
OA07135A (fr) 1984-03-31
JPS587090A (ja) 1983-01-14
DE3266378D1 (en) 1985-10-24
AR230667A1 (es) 1984-05-31
BR8203681A (pt) 1983-06-21
NO822217L (no) 1983-01-03
CA1177748A (en) 1984-11-13
FR2508538A1 (fr) 1982-12-31
EG15917A (en) 1987-04-30
AU8899882A (en) 1984-04-12
AU558006B2 (en) 1987-01-15

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