US2764938A - Open hole carrier - Google Patents

Open hole carrier Download PDF

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US2764938A
US2764938A US116295A US11629549A US2764938A US 2764938 A US2764938 A US 2764938A US 116295 A US116295 A US 116295A US 11629549 A US11629549 A US 11629549A US 2764938 A US2764938 A US 2764938A
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carrier
charge
charges
well
face members
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US116295A
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Harcus Robert Traill
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Borg Warner Corp
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Borg Warner Corp
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/11Perforators; Permeators
    • E21B43/116Gun or shaped-charge perforators
    • E21B43/117Shaped-charge perforators

Definitions

  • This invention relates to the penetrating of oil strata and particularly to a carrier and means for accomplishing this purpose.
  • Man-made barriers to the flow of oil from the reservoir into the well may exist as the result of the building up on the walls of the hole of an impermeable sheath formed by the action of the drilling mud, or may result from water or other filtrate from the drilling fiuid permeating and wetting the surrounding formation for a distance of from several inches to a foot or more.
  • Such mud sheath or water-wet zone surrounding the well must somehow be perforated in order to obtain production.
  • a dispensable carrier may be built light enough and sufliciently frangible and drillable so that its remaining in the well will not make the whole operation infeasible, such carrier must not only be capable of carrying the charges in properly disposed positions, but it must be of a structure capable of securing the charges and capable of protecting the charges and associated firing means during the lowering of the carrier through the well bore to the oil-bearing formation.
  • the carrier comprises a plurality of face members forming a polygon adapted to be affixed to an adapter 12 by means of machine screws or bolts 14 passing through holes in the said face members and in the adapter 12.
  • the adapter 32 is provided with a threaded end 16 which may thread into a sub or other hole member which is supported by a cable which may in turn be used for raising or lowering the unit in the well.
  • the said adapter 12 is likewise provided with a bore 18 and fitting 20, the purpose of which will be hereinafter described.
  • the polygonal carrier frame 10 as shown herein may consist of four facemembers 22, 24, 26, 28, said face members being formed'of frangible, easily drillable material such as aluminum alloy and each terminating in flanges 30.
  • the flanges 38 are utilized as a means for assembling the carrier frame, said flanges being riveted together by the rivets 32 or, if it is desired,.being spotwelded.
  • Such flanges extend outwardly from the carrier itself and, as will be hereinafter explained, form, a protective guard for the entire structure.
  • the carrier 10 is adapted to support a number of lined shaped charge units 34, each of said charge units consisting, in this embodiment of the invention, of a case 36 which may be of plastic or alloy material; a liner 38, which may be of metal but which is shown here as constructed of glass; a closure 40, the function of which is to exclude liquids from the cavity formed by the liner 38 and which is in this embodiment constructed of glass and is integral with the liner 38; the explosive 42', and booster 44.
  • the liner-closure unit 3840 is cemented in place within the case 36, and the charge is fired by a detonating fuse 46 passing through a groove 47 in the rear of the charge unit strung helically through the holes 48 in the flanges 30 of the carrier, through the bore 18 of the adapter 12 to the fitting 20, where it is connected to the conductor of the cable in common manner.
  • a detonating fuse may consist of the well known Primacord encased in a tube made of material easily disintegrated by the detonation of the fuse but strong enough to take the pressure of a high head of well liquid, in this embodiment aluminum alloy.
  • the detonating fuse 46 terminates in a fitting 50 affixed to a lower guide 52.
  • Such lower guide may consist of vertical plates aflixed to the carrier structure by any common means.
  • the face members 22, 24, 26 and 28 are provided with a plurality of holes 54 cut to reduce weight in the carrier and to provide less material which must remain at the bottom .of the hole. after operation of the unit.
  • Each face member has interposed between the holes 54 the firing holes 56, alternating with charge ports 58.
  • the firing holes 56 permit the projection of the rearward end of the charge unit therethrough to contact the detonating fuse 46, and the charge ports 58 permit insertion of the charge unit into the carrier and a shooting of the jet through said ports.
  • Each charge unit. 34 is first inserted in a port 58 until its rearward groove 47 contacts the detonating fuse 46, whereupon a cap 60 consisting of a nose 62 and a fiat circular base 64. having projecting lugs 66 is passed through the said port with said lugs 66 registering with cut-away portions 68 in the face member until the base 64 contacts the closure 40 of the charge unit. The cap 60 is then rotated until the lugs 66 engage in internal recesses in the face member formed by the raised portions 70 of said face member.
  • the lugs 66 seat firmlyin the recesses of the face member and secure the charge units.
  • the invention comprises a frangible, drillablc, lightweight structure, admirably suited for positioning the charge units in the most advantageous manner for efiicient penetration of the strata. It further provides a handy means for locking the charge units into position. Again, due to the helical wrapping of the detonating fuse, such fuse contacts the booster end of the charge units without the necessity of using any excess of detonating fuse and in such manner that interference between charges and premature explosions is eliminated.
  • the pass ing of said fuse through the flanges which extend beyond thesaid fuse not only means that the charge units and the carrier itself are protected from the abrasive effect of the sides of the bore hole during lowering into the well, but that the detonating fuse is likewise protected.
  • the carrier containing the charge units may be lowered to a depth adjacent any formation desired to be opened up, the Primacord detonated electrically through the conductor of the cable in common manner, and the lined shaped charges thus fired progressively, but due to the rapid rate of propagation of detonation along the fuse, almost simultaneously.
  • the jets from the charges penetrate the mud sheath or water-wet zone about the. bore hole, or the tight formation, as the case may be, and
  • FIG. 3 shows. a modification of the charge and chargesecuring means in the carrier.
  • the lined shaped charge unit here'shown comprises a case 72; a liner, which in this instance may be. copper or other metal, 74; a closure 76 not; integral with the liner but pressfitted into the case. and sealed by an O-ring 78; explosive 80; a booster 82; and a. metal seal 84 forming the groove through which the detonating fuse 86 passes.
  • a hole 88 is provided, similar to the holes 54 but without the cut-away portions 68, and through this hole is inserted the charge unit.
  • angle members 94 punched from the said face members, and when the charge unit is passed into the carrier sufliciently for its booster end to abut the detonating fuse 86 the said angle members 94 snap intov an angular groove 96 in the case 72.
  • this type holding means for this type charge unit may, as with the embodiment of Figures 1 and 2, be adapted for charges displaced transversely at 90 intervals or phases. It will also be appreciated that in the broad aspect of this invention other known embodiments of lined shaped charges not here shown may-be used without departing from the broad principle of the invention.
  • a shaped charge carrier comprising: a hollow body, said body being of polygonal cross-section and consisting of a plurality of oppositely disposed parallel face members, each of said face members being aflixed to its adjoining face members by means of connected edge flanges, opposite parallel face members having portions shaped to define support means, shaped charge units carried by said support means oriented to direct their energy generally perpendicular to the respective parallel face members supporting them, said edge flanges extending outwardly of said body to center the carrier and prevent rotation of the carrier within a well in which the carrier is lowered, and means holding said shaped charge units in place on said support means.
  • a shaped charge carrier comprising a hollow body, said body being of polygonal cross-section and consisting of a plurality of oppositely disposed parallel face members, each of said face members being aflixed to its adjoining face members by means of connected edge flanges, opposite parallel face members having portions shaped to define support means, shaped charge units carried by said support means oriented to direct their energy generally perpendicular to the respective parallel face members supporting them, said edge flanges extending outwardly of said body and having perforations therein, a detonating fuse wound through said perforations in helical disposition to and externally of said face members, said fuse being connected to said shaped charge units so as to be capable of detonating them.
  • a shaped charge carrier comprising a hollow body, said body being of polygonal cross-section and consisting of a plurality of pairs of substantially flat oppositely disposed parallel face members, each of said face members being aflixed to its adjoining face members by means of connected edge flanges, said edge flanges extending outwardly of said body to center the carrier and prevent rotation of the carrier within a well in which the carrier is lowered, axially spaced pairs of transversely aligned front and rear shaped charge unit receiving openings in said face member pairs, shaped charge units carried within said openings oriented to direct their energy generally perpendicular to the respective parallel face members supporting them, adjacent spaced pairs of openings being angularly offset with relation to each other whereby shaped charge units carried within said openings are set in angularly phased relationship.
  • a shaped charge carrier comprising a hollow body
  • said body being of polygonal cross-section and consisting of a plurality of pairs of substantially flat oppositely disposed parallel face members, each of said face members being affixed to its adjoining face members by means of connected edge flanges, said edge flanges extending outwardly of said body and having perforations therein, a detonating fuse wound through said perforations in helical disposition to and externally of said face members, said fuse being connected to shaped charge units carried within axially spaced pairs of transversely aligned front and rear openings in said face member pairs, adjacent spaced pairs of openings being angularly offset with relation to each other whereby the said shaped charge units are set in angularly phased relationship.
  • a shaped charge carrier as in claim 1 wherein said mean holding said shaped charge units in place comprise caps abutting said charge units and having laterally projecting lugs engageable with said support means.
  • a shaped charge carrier as in claim 1 wherein said means holding said shaped charge units in place comprise grooves on said units and snap members on said face members engageable with said grooves.

Description

Oct. 2, 195-6 Filed Sept. 17. 1949 R. T. HARCUS OPEN HOLE CARRIER 2 Sheets-Sheet 1 208597 n HHEC'US,
INVENTOR.
RTTOIQ/JEVS' Oct. 2, 1956 R. T. HARCUS 2,764,938
OPEN HOLE CARRIER 2 Sheets-Sheet 2 Filed Sept. 17, 1949 205527 z M ecus,
IN V EN TOR.
United States Patent OPEN HOLE CARRIER Robert Trail] Harcus, Long Beach, Calif., assignor, by
mesne assignments, to Borg-Warner Corporation, Chicage, 11]., a corporation of Illinois This invention relates to the penetrating of oil strata and particularly to a carrier and means for accomplishing this purpose.
It is well known that considerable amounts of oil exist in reservoirs below the surface of the earth which may have been tapped by wells but from which oil is either locked out by natural or man-made barriers which prevent its recovery. Such natural barriers may consist of hard, tight formations in which the oil is stored, the permeability of which is of such a low order that the oil cannot flow through the interstices and drain into the well. Formations of this type may be either limestone or dense sandstone.
Man-made barriers to the flow of oil from the reservoir into the well may exist as the result of the building up on the walls of the hole of an impermeable sheath formed by the action of the drilling mud, or may result from water or other filtrate from the drilling fiuid permeating and wetting the surrounding formation for a distance of from several inches to a foot or more. Such mud sheath or water-wet zone surrounding the well must somehow be perforated in order to obtain production.
. Prior practice with tight natural formations was to set off heavy charges of nitroglycerin in the well and, while this undoubtedly in many cases aids production in such tight formations, by reason of the dispersed effect of the explosion its effectiveness is limited and, further, the use of large amounts of nitroglycerin or similar explosives is dangerous to Well equipment and must be followed b extensive cleaning out and bailing operations.
As regards man-made barriers, prior practice has been to attempt to penetrate the mud sheath'or water-wet zone by the use of bullets, but it is difficult to impart to the bullets the energy necessary to bring about desired penetration.
Again, in many old wells wherein a good flow from reservoir to well had once existed, production becomes lower due to a clogged sand condition in the vicinity of the well bore, or where parafiin or other substances have coated the producing zone causing a decrease in the rate of flow. Here, as above, bullets have been used in an attempt to perforate such congested zones but subject to the same limitations as to penetrability as set forth above.
And further, aside from primary oil flow, certain practices are in use in the oil industry today which require or are greatly enhanced by the opening up of the oilbearing formations. For example, with limestone formations it is common practice to treat the formations with acid to enlarge the interstices of the formation and thus facilitate the flow of oil into the well. If deep channels into the formation could be opened, the acidizing would be much more effective. Non-directional blasting has not been effective enough to do this because the energy is not concentrated enough; similarly bullet perforating has also proven unsatisfactory because'of inadequate penetration and the bullets remaining to block the channels they create. a
In addition to practices such as acidizing, certain secondary recovery methods, as Water-flooding or gas injection, would be facilitated by the penetration of any natural or man-made barrier which might impede the How of the driving medium into the formation.
In an effort to provide means for accomplishing the penetration through natural or man-made barriers from Well into formation and to open up the formation to enhance the flow of oil therefrom, recourse has been had to the use of lined shaped charges. Such charges are explosives but, as contrasted with previous nitroglycerin practice, are explosives having a highly effective directional effect. Indeed such explosives, in addition to pro- "idinga directional efliect achieve, by the provision of a cavity in the surface of an explosive, a liner in said cavity, and a closure for said lined cavity, an entirely new and different explosive effect, namely, the formation from the liner of a thin pencil-like jet traveling through the barrier and into the formation at speeds believed to exceed the rate of advance of the detonation wave of the explosive itself. However, difficulty in the use of such lined shaped charges has been occasioned by several factors. First, while a retrievable metal gun body carrying the charges might be thought advisable for lowering the charges into the well to the vicinity of the oil-bearing formation, the amount of explosive required for the charges, the general structure of the charges, the necessity of providing firing means for the charges and the limited confines of the Well bore, have indicated that the retrievable gun is impractical, due to its space requirements.
Second, recourse to a dispensable carrier for the charges has presented the problem that the debris from the carrier, following its destruction by the explosive charges, is left in the well.
Third, assuming that a dispensable carrier may be built light enough and sufliciently frangible and drillable so that its remaining in the well will not make the whole operation infeasible, such carrier must not only be capable of carrying the charges in properly disposed positions, but it must be of a structure capable of securing the charges and capable of protecting the charges and associated firing means during the lowering of the carrier through the well bore to the oil-bearing formation.
It is therefore a general object of this invention to provide a means for achieving the opening up of tight formations by penetration thereinto, whether directly or through barriers such as mud sheaths or water-wet zones.
It is a further object of this invention to provide a novel and practicable shaped charge assembly.
Again it is an object of this invention to provide a carrier adapted to support and position shaped charges and their firing means as they are lowered into the well.
Moreover, it is another object of the invention to provide a carrier for shaped charges of simple, frangible, drillable construction, so that after detonation of the shaped charges within a well the remnants of the carrier will not interfere unduly with subsequent operations in the well.
His a still further object of the invention to provide a shaped charge carrier of light construction, but still capable of safely securing and protecting shaped charges 1 and 2, the carrier comprises a plurality of face members forming a polygon adapted to be affixed to an adapter 12 by means of machine screws or bolts 14 passing through holes in the said face members and in the adapter 12. The adapter 32 is provided with a threaded end 16 which may thread into a sub or other hole member which is supported by a cable which may in turn be used for raising or lowering the unit in the well. The said adapter 12 is likewise provided with a bore 18 and fitting 20, the purpose of which will be hereinafter described.
The polygonal carrier frame 10 as shown herein may consist of four facemembers 22, 24, 26, 28, said face members being formed'of frangible, easily drillable material such as aluminum alloy and each terminating in flanges 30. The flanges 38 are utilized as a means for assembling the carrier frame, said flanges being riveted together by the rivets 32 or, if it is desired,.being spotwelded. Such flanges, as will be seen, extend outwardly from the carrier itself and, as will be hereinafter explained, form, a protective guard for the entire structure.
The carrier 10 is adapted to support a number of lined shaped charge units 34, each of said charge units consisting, in this embodiment of the invention, of a case 36 which may be of plastic or alloy material; a liner 38, which may be of metal but which is shown here as constructed of glass; a closure 40, the function of which is to exclude liquids from the cavity formed by the liner 38 and which is in this embodiment constructed of glass and is integral with the liner 38; the explosive 42', and booster 44. The liner-closure unit 3840 is cemented in place within the case 36, and the charge is fired by a detonating fuse 46 passing through a groove 47 in the rear of the charge unit strung helically through the holes 48 in the flanges 30 of the carrier, through the bore 18 of the adapter 12 to the fitting 20, where it is connected to the conductor of the cable in common manner. Such detonating fuse may consist of the well known Primacord encased in a tube made of material easily disintegrated by the detonation of the fuse but strong enough to take the pressure of a high head of well liquid, in this embodiment aluminum alloy. It will be noted that the detonating fuse 46 terminates in a fitting 50 affixed to a lower guide 52. Such lower guide may consist of vertical plates aflixed to the carrier structure by any common means.
As is apparent from the drawings, the face members 22, 24, 26 and 28 are provided with a plurality of holes 54 cut to reduce weight in the carrier and to provide less material which must remain at the bottom .of the hole. after operation of the unit. Each face member has interposed between the holes 54 the firing holes 56, alternating with charge ports 58. The firing holes 56 permit the projection of the rearward end of the charge unit therethrough to contact the detonating fuse 46, and the charge ports 58 permit insertion of the charge unit into the carrier and a shooting of the jet through said ports.
Each charge unit. 34 is first inserted in a port 58 until its rearward groove 47 contacts the detonating fuse 46, whereupon a cap 60 consisting of a nose 62 and a fiat circular base 64. having projecting lugs 66 is passed through the said port with said lugs 66 registering with cut-away portions 68 in the face member until the base 64 contacts the closure 40 of the charge unit. The cap 60 is then rotated until the lugs 66 engage in internal recesses in the face member formed by the raised portions 70 of said face member. Since there is a certain resiliency in the detonating fuse due to the encasing tube and the closure 40 of the charge unit presses against the base 64 of the cap 62, the lugs 66 seat firmlyin the recesses of the face member and secure the charge units.
As shown in Figure 1, proper aligning of the relative holes 54', 56 and ports 58 of the various'face members permits the progressive positioning of the charge units -'at 90 transverse intervals or phasing. As shown in Figure 1, the rearward end of the uppermost charge unit is shown. Next, the second. charge unit is. pointed to. the. right. The third charge unit is pointed at the observer, and the fourth charge unit is pointed to the left. This permits an effective pattern of penetration into the formation. Similarly, in an embodiment comprising an hexagonal carrier 60 or even 120 phasing would be advantageous. It will be appreciated that the embodiment herein shown sets forth a four-charge-unit carrier and that many more charge units can be used in a, longer assembly.
Thus the invention comprises a frangible, drillablc, lightweight structure, admirably suited for positioning the charge units in the most advantageous manner for efiicient penetration of the strata. It further provides a handy means for locking the charge units into position. Again, due to the helical wrapping of the detonating fuse, such fuse contacts the booster end of the charge units without the necessity of using any excess of detonating fuse and in such manner that interference between charges and premature explosions is eliminated. The pass ing of said fuse through the flanges which extend beyond thesaid fuse not only means that the charge units and the carrier itself are protected from the abrasive effect of the sides of the bore hole during lowering into the well, but that the detonating fuse is likewise protected. The carrier containing the charge units may be lowered to a depth adjacent any formation desired to be opened up, the Primacord detonated electrically through the conductor of the cable in common manner, and the lined shaped charges thus fired progressively, but due to the rapid rate of propagation of detonation along the fuse, almost simultaneously. The jets from the charges penetrate the mud sheath or water-wet zone about the. bore hole, or the tight formation, as the case may be, and
further. penetrate on into the formation. Cracks in the formation develop radially from the holes in the formation caused by the jets and the formation is thus opened up either to increased production or to the forcing of secondary driving materials or acidizing materials into the said formation.
Figure 3 shows. a modification of the charge and chargesecuring means in the carrier. The lined shaped charge unit here'shown comprises a case 72; a liner, which in this instance may be. copper or other metal, 74; a closure 76 not; integral with the liner but pressfitted into the case. and sealed by an O-ring 78; explosive 80; a booster 82; and a. metal seal 84 forming the groove through which the detonating fuse 86 passes. A hole 88 is provided, similar to the holes 54 but without the cut-away portions 68, and through this hole is inserted the charge unit. In the face members 90 and 92 are provided angle members 94, punched from the said face members, and when the charge unit is passed into the carrier sufliciently for its booster end to abut the detonating fuse 86 the said angle members 94 snap intov an angular groove 96 in the case 72. Thus. is secured that type of charge unit within the carrier and, as is obvious, this type holding means for this type charge unit may, as with the embodiment of Figures 1 and 2, be adapted for charges displaced transversely at 90 intervals or phases. It will also be appreciated that in the broad aspect of this invention other known embodiments of lined shaped charges not here shown may-be used without departing from the broad principle of the invention.
While there. has been described what are at present considered. preferred embodiments of the present invention, it will be apparent to those skilled in the art that various modifications and changes may be made with out departing from the essence of the invention, and it is intended to cover herein all such modifications and changes as come within the true scope and spirit of the appended claims.
I claim:
1. A shaped charge carrier comprising: a hollow body, said body being of polygonal cross-section and consisting of a plurality of oppositely disposed parallel face members, each of said face members being aflixed to its adjoining face members by means of connected edge flanges, opposite parallel face members having portions shaped to define support means, shaped charge units carried by said support means oriented to direct their energy generally perpendicular to the respective parallel face members supporting them, said edge flanges extending outwardly of said body to center the carrier and prevent rotation of the carrier within a well in which the carrier is lowered, and means holding said shaped charge units in place on said support means.
2. A shaped charge carrier comprising a hollow body, said body being of polygonal cross-section and consisting of a plurality of oppositely disposed parallel face members, each of said face members being aflixed to its adjoining face members by means of connected edge flanges, opposite parallel face members having portions shaped to define support means, shaped charge units carried by said support means oriented to direct their energy generally perpendicular to the respective parallel face members supporting them, said edge flanges extending outwardly of said body and having perforations therein, a detonating fuse wound through said perforations in helical disposition to and externally of said face members, said fuse being connected to said shaped charge units so as to be capable of detonating them.
3. A shaped charge carrier comprising a hollow body, said body being of polygonal cross-section and consisting of a plurality of pairs of substantially flat oppositely disposed parallel face members, each of said face members being aflixed to its adjoining face members by means of connected edge flanges, said edge flanges extending outwardly of said body to center the carrier and prevent rotation of the carrier within a well in which the carrier is lowered, axially spaced pairs of transversely aligned front and rear shaped charge unit receiving openings in said face member pairs, shaped charge units carried within said openings oriented to direct their energy generally perpendicular to the respective parallel face members supporting them, adjacent spaced pairs of openings being angularly offset with relation to each other whereby shaped charge units carried within said openings are set in angularly phased relationship. 1
4. A shaped charge carrier comprising a hollow body,
said body being of polygonal cross-section and consisting of a plurality of pairs of substantially flat oppositely disposed parallel face members, each of said face members being affixed to its adjoining face members by means of connected edge flanges, said edge flanges extending outwardly of said body and having perforations therein, a detonating fuse wound through said perforations in helical disposition to and externally of said face members, said fuse being connected to shaped charge units carried within axially spaced pairs of transversely aligned front and rear openings in said face member pairs, adjacent spaced pairs of openings being angularly offset with relation to each other whereby the said shaped charge units are set in angularly phased relationship.
5. A shaped charge carrier as in claim 1 wherein said mean holding said shaped charge units in place comprise caps abutting said charge units and having laterally projecting lugs engageable with said support means.
6. A shaped charge carrier as in claim 1 wherein said means holding said shaped charge units in place comprise grooves on said units and snap members on said face members engageable with said grooves.
References Cited in the file of this patent UNITED STATES PATENTS 1,318,772 Koren Oct. 14, 1919 2,366,374 Whitesell Jan. 2, 1945 2,402,153 Elliott June 18, 1946 2,494,256 Muskat Ian. 10, 1950 2,543,814 Thompson Mar. 6, 1951 2,649,046 Davis Aug. 18, 1953 2,680,406 Austin June 8, 1954 2,686,472 Burns Aug. 17, 1954 FOREIGN PATENTS 414,959 Great Britain Aug. 16, 1934 OTHER REFERENCES Article by Robert H. McLemore entitled Formation Penetrating With Shaped Explosive Charges, published in The Oil Weekly, July 8, 1946, vol. 122, No. 6, pages 56 and 58.
Article by R. H. McLemore entitled Casing Perforating With Shaped Explosive Charges, published in The Oil and Gas Journal, issue of December 28, 1946, 4 pages.
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Cited By (30)

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US2833213A (en) * 1951-04-13 1958-05-06 Borg Warner Well perforator
US2980018A (en) * 1956-01-03 1961-04-18 Borg Warner Well perforator shaped charge
US2990774A (en) * 1957-12-13 1961-07-04 Great Lakes Carbon Corp Retrievable carrier for a shaped charge perforator
US2990773A (en) * 1957-05-13 1961-07-04 Great Lakes Carbon Corp Apparatus for perforating well casing
US3035518A (en) * 1959-05-25 1962-05-22 Du Pont Detonation-wave shaper
US3048101A (en) * 1960-02-23 1962-08-07 Schlumberger Well Surv Corp Perforating apparatus
US3078797A (en) * 1960-11-08 1963-02-26 Schlumberger Well Surv Corp Strip gun improvements
US3094930A (en) * 1960-05-18 1963-06-25 Schlumberger Well Surv Corp Expendable perforating apparatus
US3346056A (en) * 1965-05-24 1967-10-10 Dresser Ind Hollow carrier gun
US3650212A (en) * 1970-05-11 1972-03-21 Western Dynamics Inc Economical, tough, debris-free shaped charge device and perforating gun assembly employing same
US3659658A (en) * 1970-09-28 1972-05-02 Schlumberger Technology Corp Well perforating apparatus
US3773119A (en) * 1972-09-05 1973-11-20 Schlumberger Technology Corp Perforating apparatus
US4312273A (en) * 1980-04-07 1982-01-26 Shaped Charge Specialist, Inc. Shaped charge mounting system
EP0157535A1 (en) * 1984-03-21 1985-10-09 Jet Research Center, Inc. Well perforating gun
US4583602A (en) * 1983-06-03 1986-04-22 Dresser Industries, Inc. Shaped charge perforating device
US4598775A (en) * 1982-06-07 1986-07-08 Geo. Vann, Inc. Perforating gun charge carrier improvements
US4609057A (en) * 1985-06-26 1986-09-02 Jet Research Center, Inc. Shaped charge carrier
US4621396A (en) * 1985-06-26 1986-11-11 Jet Research Center, Inc. Manufacturing of shaped charge carriers
US4655138A (en) * 1984-09-17 1987-04-07 Jet Research Center, Inc. Shaped charge carrier assembly
US4726431A (en) * 1986-05-19 1988-02-23 James R. Duzan Well perforating apparatus and method
US4773299A (en) * 1986-05-19 1988-09-27 Halliburton Company Well perforating apparatus and method
US4784061A (en) * 1987-10-05 1988-11-15 Halliburton Company Capsule charge locking device
US4817531A (en) * 1987-10-05 1989-04-04 Jet Research Center, Inc. Capsule charge retaining device
US4832134A (en) * 1987-12-07 1989-05-23 Jet Research Center, Inc. Shaped charge assembly with retaining clip
US4844170A (en) * 1988-03-30 1989-07-04 Jet Research Center, Inc. Well perforating gun and method
US4889183A (en) * 1988-07-14 1989-12-26 Halliburton Services Method and apparatus for retaining shaped charges
US5054564A (en) * 1986-05-19 1991-10-08 Halliburton Company Well perforating apparatus
US5095999A (en) * 1990-08-07 1992-03-17 Schlumberger Technology Corporation Through tubing perforating gun including a plurality of phased capsule charges mounted on a retrievable base strip via a plurality of shatterable support rings
US6439121B1 (en) 2000-06-08 2002-08-27 Halliburton Energy Services, Inc. Perforating charge carrier and method of assembly for same
US20080121095A1 (en) * 2006-08-29 2008-05-29 Schlumberger Technology Corporation Loading Tube For Shaped Charges

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US2833213A (en) * 1951-04-13 1958-05-06 Borg Warner Well perforator
US2980018A (en) * 1956-01-03 1961-04-18 Borg Warner Well perforator shaped charge
US2990773A (en) * 1957-05-13 1961-07-04 Great Lakes Carbon Corp Apparatus for perforating well casing
US2990774A (en) * 1957-12-13 1961-07-04 Great Lakes Carbon Corp Retrievable carrier for a shaped charge perforator
US3035518A (en) * 1959-05-25 1962-05-22 Du Pont Detonation-wave shaper
US3048101A (en) * 1960-02-23 1962-08-07 Schlumberger Well Surv Corp Perforating apparatus
US3094930A (en) * 1960-05-18 1963-06-25 Schlumberger Well Surv Corp Expendable perforating apparatus
US3078797A (en) * 1960-11-08 1963-02-26 Schlumberger Well Surv Corp Strip gun improvements
US3346056A (en) * 1965-05-24 1967-10-10 Dresser Ind Hollow carrier gun
US3650212A (en) * 1970-05-11 1972-03-21 Western Dynamics Inc Economical, tough, debris-free shaped charge device and perforating gun assembly employing same
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US3773119A (en) * 1972-09-05 1973-11-20 Schlumberger Technology Corp Perforating apparatus
DE2344454A1 (en) * 1972-09-05 1974-05-30 Schlumberger Prospection DRILL HOLE PERFORATION DEVICE
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US4832134A (en) * 1987-12-07 1989-05-23 Jet Research Center, Inc. Shaped charge assembly with retaining clip
US4844170A (en) * 1988-03-30 1989-07-04 Jet Research Center, Inc. Well perforating gun and method
US4889183A (en) * 1988-07-14 1989-12-26 Halliburton Services Method and apparatus for retaining shaped charges
US5095999A (en) * 1990-08-07 1992-03-17 Schlumberger Technology Corporation Through tubing perforating gun including a plurality of phased capsule charges mounted on a retrievable base strip via a plurality of shatterable support rings
US6439121B1 (en) 2000-06-08 2002-08-27 Halliburton Energy Services, Inc. Perforating charge carrier and method of assembly for same
US20080121095A1 (en) * 2006-08-29 2008-05-29 Schlumberger Technology Corporation Loading Tube For Shaped Charges
US7942098B2 (en) * 2006-08-29 2011-05-17 Schlumberger Technology Corporation Loading tube for shaped charges

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