US3717207A - Perforating apparatus - Google Patents

Perforating apparatus Download PDF

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Publication number
US3717207A
US3717207A US00155963A US3717207DA US3717207A US 3717207 A US3717207 A US 3717207A US 00155963 A US00155963 A US 00155963A US 3717207D A US3717207D A US 3717207DA US 3717207 A US3717207 A US 3717207A
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United States
Prior art keywords
retainer
shaped
port
charge
carrier
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 - Lifetime
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US00155963A
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English (en)
Inventor
J Shore
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 Technology Corp
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Schlumberger Technology Corp
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Filing date
Publication date
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Publication of US3717207A publication Critical patent/US3717207A/en
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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
    • 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

  • shaped charges adapted for installation in a typical end-loaded carrier are respectively provided with a rigid annular retainer member which is movably disposed on the forward end of each charge.
  • Camming surfaces are cooperatively arranged for shifting the retainer member forwardly in relation to the shaped charge once it is installed in the carrier facing and aligned with a lateral port therein. In this manner, when the port plug is installed in the port, it will engage the retainer and tightly anchor the shaped charge in'position.
  • One of the more typical oil field perforators in com.- mon usage today is comprised of an enclosed tubular body having one or more laterally-directed shaped explosive charges mounted at longitudinally-spaced intervals therein and operatively associated with electricallyresponsive detonating means.
  • the perforator body or so-called carrier is a heavy-walled cylinder designed to withstand the extreme explosive forces produced by the detonation of the explosives carried therein.
  • each shaped charge is respectively faced toward a lateral port in the carrier body which is customarily covered by an expendable portclosure member such as a threaded plug which is fluidly sealed in the port.
  • an expendable portclosure member such as a threaded plug which is fluidly sealed in the port.
  • one typical mounting arrangement (as shown in Pat. No. 3,246,707 at 60) employs a metallic apertured cover or a truncated conical sleeve which is secured over the forward end of a shaped charge and adapted for contacting its associated port plug to firmly secure the shaped charge in position when the port plug is installed into the port opening.
  • another common design employs a thick resilient sleeve which is coaxially mounted around the forward end of a shaped charge and adapted to be axially compressed between the base of the port plug and the charge case as the plug is tightened.
  • annular retainer means on a shaped explosive charge for movement thereon between a first or retracted position permitting placement of the shaped charge within an enclosed carrier facing a lateral port and a second or extended position for abutment with a port-closure member in stalled in the lateral port for tightly securing the shaped charge in the carrier and in alignment with the port.
  • FIG. 1 shows typical perforating apparatus employing the principles of the present invention
  • FIG. 2 depicts a perferred embodiment of the new and impoved perforating apparatus of the present invention
  • FIGS. 3 and 4 are additional views showing the details of the preferred apparatus illustrated in FIG. 2;
  • FIGS. 5 and 6 are enlarged cross-sectional views respectively illustrating the assembly of the apparatus of FIG. 2.
  • the perforating apparatus 10 includes an elongated tubular body or carrier 13 having a plurality of longitudinally-spaced side openings or ports 14 which are respectively fluidly sealed and closed by a port-closure member such as a threaded plug 15.
  • the perforating apparatus 10 further includes perforating means which, in the preferred embodiment of the present invention, are comprised of a plurality of laterally-directed shaped explosive charges 16 disposed at longitudinally-spaced intervals in the carrier 13 and, as will subsequently be explained, are secured therein respectively facing the lateral ports 14.
  • the perforating means further include selectively-operable detonating means such as an electrically-responsive blasting cap 17 operatively coupled to a length of detonating cord 18 that is mounted in detonating proximity of each of the shaped charges 16.
  • selectively-operable detonating means such as an electrically-responsive blasting cap 17 operatively coupled to a length of detonating cord 18 that is mounted in detonating proximity of each of the shaped charges 16.
  • a typical shaped charge liner 19 is operatively disposed in the hollowed forward end of an explosive pellet 20 and adapted for producing, upon detonation, a perforating jet which is directed along a selected perforating axis 21 toward the right as viewed in the drawings.
  • the shaped charge 16 further includes a cylindrical container which in the illustrated preferred embodiment is comprised of a metallic inner jacket 22 and an outer case 23 of a suitable plastic material for minimizing the effects of laterally-directed explosive forces on the interior walls of the carrier 13.
  • the rear of the outer case 23 is reduced as illustrated to provide a rearwardly-projecting axially-aligned boss 24 having a slot or opening 25 for retaining the detonating cord 18 within detonating proximity of the explosive pellet 20. Since the outer case 23 must complementally fit the internal configuration of the carrier 13, the forward end of the case is rounded, as at 26, in a plane perpendicular to the plane of the drawings.
  • the shaped charge 16 is shown positioned in the carrier 13 adjacent to and facing one of the ports 14 and in coincidental alignment therewith.
  • the internal rear wall of the carrier 13 is provided with an inwardly-facing recess which is coincidentally aligned with the port 14 and complementally shaped to partially receive the boss 24.
  • the detonating cord 18 is disposed in the opening 25.
  • the retainer 27 is angularly oriented in relation to the shaped charge 16 so as to locate the legs 30 on the rearward surfaces 32 and thereby retracting the retainer into the forward end of the case 23. This will, of course, allow the shaped charge 16 to be installed through one end and into the carrier 13 by a typical loading tool (not shown) and held in the illustrated position until the charge is secured into position.
  • the retainer 27 is rotated in a clockwise direction by inserting a tool (not shown) into the port 14.
  • a tool (not shown) into the port 14.
  • slots or lugs are arranged in the retainer opening 28 for engagement by this tool to rotate the retainer 27.
  • Rotation of the retainer 27 will bring the legs 30 up the camming surfaces 31 onto the forward surfaces 33 until the legs contact the stops 34.
  • the retainer spacer 29 is inserted into the opening 28 and the port plug 15 is threaded into the port 14 until the base of the plug is engaged with the spacer to firmly seat the boss 24 in the recess 35 and secure the charge 16 between the rear wall of the carrier 13 and the base of the port plug. It will be recognized, of course, that the plug 15 is tightened until the legs 30 are tightly engaged against the seating surfaces 33.
  • Perforating apparatus comprising: a tubular body having a lateral port in a wall thereof providing access to the internal bore thereof; perforating means in said body and including shaped explosive charge means transversely oriented, in said internal bore and having its forward end, facing said port; and means cooperatively securing said shaped'charge means in coincidental alignment with said port including rigid retainer means movably disposed between said shaped charge means and said port, camming means cooperatively arranged between said retainer means and said shaped charge means and adapted for axially shifting said retainer means forwardly in relation to said shaped charge means upon rotation of said retainer means from a rearward retainer position permitting insertion of said transversely-oriented shaped charge means and said retainer means into said internal bore to a forward retainer position where a forward portion of said retainer means is advanced ahead of said forward end of said shaped charge means, and means adapted for insertion into said port for closing said port and engaging said forward end of said retainer means for securing said shaped charge means between said retainer means
  • the perforating apparatus of claim 1 further including a rearwardly-directed portion on said shaped charge means, and a recess in said opposite wall of said body coincidentally aligned with said port and adapted to at least partially receive said rearWardly-directed portion of said shaped charge means.
  • perforating apparatus of claim -1 wherein said perforating means further include electrically-responsive detonating means cooperatively associated with said shaped charge means and adapted for detonating said shaped charge means in response to an electrical signal.
  • said retainer means include an annular member having a forwardly-curved forward end and a rearwardly-directed annular portion coaxially arranged around said shaped charge means defining a first part of said camming means; and said shaped charge means having a forwardly-directed annular portion defining a second part of said camming means.
  • one of said annular portions includes an inclined surface defining one of said first and said second parts of said Carnming means and the other of said annular portions includes a cooperative surface defining the other of said first and second parts of said camming means.
  • Perforating apparatus comprising: a tubular body adapted for suspension in a well bore and having at least one laterally-directed threaded port therein providing access to the internal bore of said body; perforating means in said body and including a shaped explosive charge disposed in a cylindrical case member uniformly arranged around the perforating axis of said shaped explosive charge and having a forward portion projecting forwardly of said shaped explosive charge; and retaining means adapted for securing said shaped explosive charge transversely in said body facing said threaded port and in coincidental alignment therewith and including a rigid annular retainer member coaxially arranged around said perforating axis between said shaped explosive charge and said threaded port, camming means including first and second coengaged surfaces cooperatively arranged on said members for axially advancing said retainer member ahead of said forward case portion upon rotation of said retainer member, and means including a threaded portclosure member adapted for engagement with said retainer member in its said extended position.
  • first surfaces are comprised of a plurality of axially-inclined surfaces distributed circumferentially around said forward case portion and said second surfaces are comprised of a corresponding number of rearwardly-projecting legs on said retainer member.
  • a shaped charge assembly adapted for installation in an enclosed tubular carrier and facing a lateral port in the wall of such a carrier, said assembly comprising: a
  • cylindrical case having an open forward portion complementally shaped to conform to the internal wall of a tubular carrier and a closed rearward portion adapted to receive a shaped explosive charge; a shaped explosive charge disposed in said closed case portion and faced forwardly toward said open case portion; an annular retainer member movably disposed on said open case portion; and camming means cooperatively arranged between said retainer member and said forward case portion and adapted for moving said retainer member ahead of said forward case portion upon rotation of said retainer member.
  • camming means are comprised of first surfaces on said forward case portion and second surfaces on said retainer member cooperatively engaged with said first surfaces and adapted for axially advancing said retainer member forwardly upon rotation of said retainer member.

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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)
  • Portable Nailing Machines And Staplers (AREA)
  • Chain Conveyers (AREA)
  • Automatic Analysis And Handling Materials Therefor (AREA)
US00155963A 1971-06-23 1971-06-23 Perforating apparatus Expired - Lifetime US3717207A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US15596371A 1971-06-23 1971-06-23

Publications (1)

Publication Number Publication Date
US3717207A true US3717207A (en) 1973-02-20

Family

ID=22557484

Family Applications (1)

Application Number Title Priority Date Filing Date
US00155963A Expired - Lifetime US3717207A (en) 1971-06-23 1971-06-23 Perforating apparatus

Country Status (8)

Country Link
US (1) US3717207A (OSRAM)
AR (1) AR201905A1 (OSRAM)
BR (1) BR7203995D0 (OSRAM)
CA (1) CA954446A (OSRAM)
DE (1) DE2230068A1 (OSRAM)
FR (1) FR2143253B1 (OSRAM)
GB (1) GB1393303A (OSRAM)
IT (1) IT956699B (OSRAM)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3773119A (en) * 1972-09-05 1973-11-20 Schlumberger Technology Corp Perforating apparatus
US4191265A (en) * 1978-06-14 1980-03-04 Schlumberger Technology Corporation Well bore perforating apparatus
US20130340599A1 (en) * 2012-06-20 2013-12-26 Schlumberger Technology Corporation Reusable perforating gun and port plug

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3773119A (en) * 1972-09-05 1973-11-20 Schlumberger Technology Corp Perforating apparatus
US4191265A (en) * 1978-06-14 1980-03-04 Schlumberger Technology Corporation Well bore perforating apparatus
US20130340599A1 (en) * 2012-06-20 2013-12-26 Schlumberger Technology Corporation Reusable perforating gun and port plug

Also Published As

Publication number Publication date
AR201905A1 (es) 1975-04-30
FR2143253B1 (OSRAM) 1975-10-03
AU4369372A (en) 1974-01-03
DE2230068A1 (de) 1973-01-11
CA954446A (en) 1974-09-10
BR7203995D0 (pt) 1973-05-17
GB1393303A (en) 1975-05-07
IT956699B (it) 1973-10-10
FR2143253A1 (OSRAM) 1973-02-02

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