US2357564A - Gun perforator - Google Patents

Description

Sept. '5, 1%. e. F. TURECHEK GUN PERFORATOR Filed Aug. 13, 1943 TUl-EECHEK mm m m N. O @W PEBFQRATOR George F. Turecliek, Los Angelou, Calm,

2' 0! to Lane-Wells Company, Los Angeles, Ca a corporation of Delaware Application August 13, 1943, Serial Nordilfijdl I 14 Claims.

My invention relates to gun perforators, that is, to devices which are adapted to be lowered within well casing tor the purpose of firing bullets laterally into the surrounding formation and thereby form passages for the flow of oil into theoil well. Among the objects of my invention are:

First, to provide a gun perforator wherein the cartridge chambers are arranged in opposed pairs and are closed by unthreaded plugs between which is interposed a compression block whereby the explosive forces generated in the cartridge chambers (which would otherwise blow the plugs from 2 formed in the gun body. These gun bores are parallel and occupy a common plane intersecting one side of the gun body in a vertical line. At the o posite side of the gun body from the muzzle ends of the gun bores and located midway therebetween is a recess 8 having horizontal upper gun unit, including two cartridge chambers and their respective bores, may be removed and reassembled without further use of tools;

Third, to provide a gun perforator of this character wherein the several dual gun units may be overlapped axially and their respective gun bores aimed in various directions in such a manner that a relatively large number of gun units may be incorporated in a gun body of limited length, thereby providing a gun perforator having a favorable weight or length per gun bore ratio;

Fourth, to provide a gun perforator incorporating a dual gun unit which, although arranged so that the explosive forces are counterbalanced when the two elements of thegun unit are fired simultaneously, nevertheless is capable of being fired one element at a time, thus the cartridges may be fired individually, or in pairs as desired, and no damage is inflicted should one of the cartridges misfire; and

Fifth, to provide a gun perforator which is adapted to be fired electrically.

With the above and other objects in view, as may appear hereinafter, reference is directed to the accompanying drawing, in which:

Figure 1 is an elevational view of my gun periorator;

Figure 2 is an enlarged fragmentary longitudinal sectional view thereof, taken through l2 of Figure 1; and

Figure 3 is a transverse sectional view taken through 33 of Figure 1.

My gun periorator is incorporated in a gun body I, which is in the form of a cylindrical bar of steel. Each gun unit includes two gun bores and lower walls in which are formed sockets which extend upwardly and downwardly to intersect the rear ends of the respective gun bores 2. The inner end of each socket forms a cartridge chamber A while the outer end is counterbored, forming a shoulder 5. The two cartridge chambers of each gun unit receive cartridges 6. Each cartridge 6 comprises a container of insulating material having electrical terminals at its end connected within the cartridge by means of a fuse wire.

The counterbored portion outwardly from each cartridge chamber receives a cylindrical plug 5, the inner end of which seats against the corresponding shoulder B. Each plug 7 is formed of steel and provided with an annular channel 8 which receives a seal ring 9. Each seal ring 8 is substantially V-shaped in cross section, forming lips which are directed outwardly so. that fluid pressureentering through the recess 1 spreads the lips of the seal ring against the plug and surroundng walls, thereby efiecting a seal against the entrance of fluid into the corresponding cartridge chamber. Each plug 1 is provided with a small longitudinal opening therethrough which receives a terminal unit it. The terminal unit is provided with a contact head at-the inner side of the plug which. is engaged by one of the terminals of the corresponding cartridge 8. The oifter end of the terminal unit is provided with a seal plug l l to exclude fluid and is provided with a terminal nut to which may be attached a lead wire, as will be described hereinafter.

The outer ends of the pair of plugs 1 project slightly from the axially opposite side of-the recess 3. A compression block I! fits between the pair of plugs 1, the axialend of the compression .block being provided with clearance channels l3 for the outer ends of the terminal unit ID. The compression block I 2 is held in place by a bolt I4, the shank of which fits loosely in a hole through the compression block so that the compression block is capable of a slight movement longitud nally with respect to the gun body.

Each gun bore receives a bullet l5 and its outer end is closed by a muzzle cap IE to exclude fluid. Each gun unit thus comprises a pair of gun bores, a pair of cartridge chambers, a pair of sealing plugs for these chambers and a compression block between the plugs, the cartridge chambers and sealing plugs being in axial alignment. The gun units thus defined occupy a generally U-shaped portion of the gun body, the gun bores forming the legs of the U and the chambers and recess the cross portion thereof. It is therefore possible for the adjacent gun units to be overlapped axially; that is, by directing the gun bores of adjacent gun units in different directions they may extend in the space defined by the U of the neighboring gun unit, as shown in Figure 2 and in Figure 1 wherein A designates the first gun unit, and B and C overlapping the second and third gun units.

.Ample space may be provided between the gun bores of each gun unit to permit a relatively wide recess 3 in order that tools may be applied for boring out the sockets 4 which form the cartridge chambers and counterbored plug-receiving portions. Also, advantage is gained in the fact that the gun bores of each gun unit are spaced a substantial distance apart for inasmuch as it is preferred to fire the'm simultaneously, and by reason of this substantial distance there is little or no danger of excessively straining the well casing longitudinally between the points of penetration of the bullet. By reason of the axially overlapping arrangement of the gun units a desirable spacing of the gun bores of each unit is accomplished without waste of gun body length.

The gun body is provided with a conductor channel 11 extending past the recesses of each group of gun units. Each channel receives a multiple wire conductor 18 having branch leads l9; one lead may connect to the two cartridges of each unit or individual leads may be provided for the two cartridges.

Operation of my gun perforator is as follows: If both cartridges of each gun unit are fired simultaneously the explosive forces on the sealing plugs are neutralized. If, however, only one of the cartridges'fires the force is transmitted from the plug of the fired cartridge through the compression block, and thence to the plug of the unfired cartridge and against the shoulder 5. At no time is the force of the explosion taken by the bolt H. No threads are required between the plugs and. the bores in which they fit. Thus,

while it is intended to fire the two parts of each or reload a gun unit it is merely necessary to i remove its bolt H. The compression block I! and sealing plugs Il may then be removed without tools. Reassembly is equally as-easy.

Various changes and alternate arrangements may be made within the scope of the appended claims, in which it is my intention to claim all novelty inherent in the invention.

I claim: I

1. A gun perforator comprising: a gun body defining a pair of cartridge sockets having open ends facing each other, and gun bores communicating with said cartridge sockets; plugs closing the open ends of said cartridge sockets; and means inserted between said plugs for retaining said plugs in position against explosive forces generated within said cartridge sockets.

'2. A gun perforator comprising: a gun body defining a recess, cartridge sockets extending in opposite directions from opposite walls of said recess, and gun bores extending from said carplugs against explosive pressures within said cartridge sockets.

3. A gun perforator comprising: a gun body defining a recess, a pair of oppositely directed cartridge sockets leading therefrom, their outer ends facing each other and counterbored to form shoulders, and gun bores communicating with said cartridge sockets; sealing plugs adapted to fit in the counterbored portions of said sockets and bear against said shoulders; and a compression block interposed between said sealing plugs for restraining said sealing plugs against explosive pressures within said cartridge sockets.

4. 'A gun perforator comprising: a cylindrical gun body defining a pair of laterally directed gun bores, their muzzle ends pointing in the same direction, a recess midway between said gun bores at the opposite side of said gun body from said muzzle ends; cartridge sockets extending longitudinally from said recess into intersection with the inner ends of said gun bores; and compression resisting means in said recess closing said,

- inserted therein through said recess; and a comunit being interposed between the gun bores of tridge sockets; plugs adapted to be inserted into the adjacent gun units.

7. A construction, as set forth in claim 5,

wherein each pair of gun bores and their respective cartridge sockets form a gun unit, and said gun body incorporates several of said gun units, the several gun units being arranged in axially overlapping relation, the gun bore of each gun unit being interposed between the gun bores of the adjacent gun units.

- 8. A gun perforator comprising: a gun body defining a pair of cartridge sockets having open ends facing each other, and gun bores communicating with said cartridge sockets; plugs closing the open ends of said cartridge sockets; a fiuid sealing gasket girdling each plug to prevent entrance of fiuid into said cartridge socket; and means inserted between said plugs for retaining said plugs in position against explosive forces generated within said cartridge sockets.

9. A gun perforator comprising: a gun body defining a recess, a pair of oppositely directed cartridge sockets leading therefrom, their outer ends facing each otherand counterbored to form shoulders, and gun bores communicating with said cartridge sockets; sealing plugs slidably fitting the counterbored portions of said cartridge sockets and having annular channels; sealing rings fitting said channels to seal the juncture between said sealing plugs and the counterbored portions; and a compression block interposed between said sealing plugs for restraining said several gun units being disposed in axially oversealing plugs against explosive pressures within said cartridge sockets.

10. A gun perforator comprising: a cylindrical gun body defining a pair of laterally directed ing longitudinally from said recess into intersection with the inner ends of said gun bores; sealingplugs adapted to be inserted in said cartridge sockets through said recess, said sealing plugs slidably fitting said cartridge sockets; sealing rings carried by said sealing plugs and bearing against the walls of said cartridge sockets; and a compression block interposed between said sealing plugs for holding said sealing plugs in said cartridge sockets against explosive pressures generated therein.

11. A construction, as set forth in claim 10, wherein each pair of gun bores and their respective cartridge sockets form a gun unit, and said gun body incorporates several of said gun units, the several gun units being arranged in axially overlapping relation, the gun bore of lapping relation; said body defining longitudinally extending channels intersecting said recesses, and conductors extending along said channels and having leads for communicating with said cartridge chambers through said compression resisting means.

13. A construction, as set forth in claim 5, wherein each'pair of gun bores and their respective sockets form a. gun unit, and said gun body incorporates several of, said gun units, the

several gun units being disposed in axially overlapping relation; said body defining longitu-. dinally extending channels intersecting said recesses, and conductors extending along said channels and having leadscommunicating with said cartridge chambers through said sealing each unit being interposed between the gun bores plugs.

14. A construction, as set forth inclaim 10. wherein each pair of gun bores and their respective sockets form a gun unit, and said gun body incorporates several of said gun units, the several gun units being disposed in axially overlapping relation; said body defining longitudinally extending channels intersecting said recesses, and conductors extending along said channels and having leads communicating with said cartridge chambers through said sealing plugs.

' GEORGE F. TURECHEK.

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