CN101691837A - Detonation energization explosion-propagating device for perforating gun string - Google Patents
Detonation energization explosion-propagating device for perforating gun string Download PDFInfo
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- CN101691837A CN101691837A CN200910170879A CN200910170879A CN101691837A CN 101691837 A CN101691837 A CN 101691837A CN 200910170879 A CN200910170879 A CN 200910170879A CN 200910170879 A CN200910170879 A CN 200910170879A CN 101691837 A CN101691837 A CN 101691837A
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Abstract
The invention discloses a detonation energization explosion-propagating device for a perforating gun string, which comprises a body, an energizer, two detonating cords, two explosion-propagating tubes and a centralizing ring, wherein the energizer is an ignition explosion-expanding tube consisting of a tube body, an ignition charge and explosion-expanding tube. The energizer is positioned in the middle part of the body and is centralized by the centralizing ring, and two sides of the energizer are successively provided with the explosion-propagating tubes and the detonating cords which are centralized by two centralizing sleeves. When the perforating gun string is formed, two ends of the body are connected with an upper perforating gun and a lower perforating gun respectively, and the other ends of the two detonating cords are connected with perforating bullets in the corresponding perforating guns respectively. The detonation energization explosion-propagating device is assembled between each two sections of the perforating guns and interlayer guns of the perforating gun string for oil-gas wells, solves the problems of reliable perforations and reliable explosion propagations of the interlayer guns of the prior perforating gun string, can well avoid rework accidents such as incomplete perforations, gun blockages and the like caused by insufficient self-energies of explosion-propagating materials and the losses and the attenuation of detonation wave energies in the transmission process, increases the reliability of the perforations, and improves the safety of perforation completion.
Description
Technical field
The present invention relates to a kind of explosive, relate in particular to a kind of detonation energization explosion-propagating device that is applicable to that oil, gas well perforation propagation of explosion sequence are used.
Background technology
Along with the continuous development of perforating technology, well depth is in continuous extension, and oil tube transmission perforation well section and perforating gun string are more and more longer, and perforating gun string reaches hundreds of rice even goes up km, and the reliability of its propagation of explosion sequence is very important.Perforating gun string is the series connection of many perforating guns, and the length of perforating gun string is identical with the length of perforated interval, is a kind of propagation of explosion sequence the longest in all propagation of explosion sequences.The perforating gun string that is used for perforation at present all adopts the mode of original rifle (single, double) joint serial connection more piece perforating gun.Detonation wave is ignited each joint perforating gun successively by connection rifle (single, double) joint after rifle head initiator is ignited the first segment perforating gun.Every joint perforating gun is to lean on a detonating fuse propagation of explosion and ignite perforating bullet to reach the perforation purpose.Therefore the output energy size of detonating fuse to perforating bullet detonate and the perforation effect plays crucial effects.Be to couple together between perforating gun and the perforating gun, the detonation wave stable delivery of hundreds of perforating guns is gone down by the detonation wave of the upper and lower detonating primer in connection rifle (single, double) joint with the detonating fuse in two rifles.
Usually, the propagation of explosion sequence of perforating gun string is: initiator → following detonating primer → detonating fuse → last detonating primer → following detonating primer → detonating fuse → ... → coda bullet.Yet, as the detonating fuse of one of perforating gun string propagation of explosion sequence critical piece often because of explosive payload, inhomogeneous detonation even the cutoff fault of taking place of degree of packing; In addition, because the diametric(al) of detonating fuse is influenced by rarefaction wave, cause detonation energy constantly to be decayed, this is for being arranged in the detonating fuse of interlayer gun, and this detonation wave decay is even more serious, even detonation energy can be changed into detonation and causes cutoff.And as two detonating primer of perforating gun string propagation of explosion sequence critical piece owing in assembling process, there is certain interval between its upper and lower detonating primer, when detonating fuse is gone into the well back chance high temperature generation contraction, can make between the upper and lower detonating primer apart from strengthening and, causing detonation propagation reliability of nonel tube to descend above the propagation of explosion distance that allows; In addition, for ease of easy to use, upper and lower detonating primer generally all adopts identical structure, thereby causes the detonation energy that makes in the upper and lower detonating primer not match; The more important thing is, have eccentric phenomena inevitably between the in use upper and lower detonating primer, be difficult to when off-centre is serious the detonation energy of detonating fuse decay is increased again.
Above-mentioned these problems of mentioning all will cause interrupting perforating job, and this not only can waste not perforation equipment, increase danger also can for these equipment of processing, the more important thing is dead chick hole again, and this tends to lose the best opportunity that perforation recovers the oil.Therefore, the propagation of explosion sequence of the long distance of development, multinode, high reliability, high security is very necessary.
Summary of the invention
The technical problem to be solved in the present invention is, overcomes the quality problems that existing at present oil, gas well perforating gun string propagation of explosion sequence easily produce, and provides a kind of simple in structure, and can constantly promote the detonation energization explosion-propagating device of perforation propagation of explosion sequence detonation energy.
For solving the problems of the technologies described above, detonation energization explosion-propagating device provided by the invention comprises body, energizer, two supporting positive covers, two detonating primers, two detonating fuses and sets upright circle, once be provided with first to the 5th installing hole that communicates between the described body two ends, body outer wall two ends are provided with external screw thread; Described energizer comprises housing and contains the igniting propagation squib of body, ignition charge and propagation squib, an end and ignition charge that propagation squib is positioned at body are pressed in body, the housing outer wall has cannelure and the described circle of setting upright is installed, the igniting propagation squib be fixed in the endoporus of housing and an end of propagation squib concordant with an end face of housing; Small end and cylindrical hole that described supporting positive cover has cylindrical hole and taper hole and taper hole join; First, second detonating primer respectively and corresponding being contained in the cylindrical hole of first, second supporting positive cover, first termination of first, second detonating fuse respectively and corresponding be connected with first, second detonating primer and second termination by drawing in the described taper hole; Described first supporting positive cover, described energizer and described second supporting positive cover all are placed in the described body, wherein, first supporting positive cover is arranged in first and second installing holes, energizer is arranged in the 3rd installing hole and sets upright by the described circle of setting upright, and second supporting positive cover is arranged in the 4th and the 5th installing hole and described second detonating primer is adjacent with described propagation squib; When described detonation energization explosion-propagating device and perforating gun composition perforating gun string, two external screw threads of described body are connected with following perforating gun with last perforating gun respectively, second termination of first detonating fuse links to each other with second detonating primer in second detonation energization explosion-propagating device that installs this perforating gun top after via the perforating bullet of last perforating gun, and second termination of second detonating fuse links to each other with first detonating primer in second detonation energization explosion-propagating device of this rifle below installation after via the perforating bullet of perforating gun down.
According to the present invention, an end of described first, second supporting positive cover all has the length of the length of the external screw thread and first supporting positive cover greater than second supporting positive cover; When forming perforating gun string, the external screw thread of described first supporting positive cover is connected with the boss of the solid diving board of last perforating gun and this boss is positioned in first installing hole of described body, and the external screw thread of described second supporting positive cover is connected with the boss of the solid diving board of rifle of following perforation and this boss is positioned in the 5th installing hole of described body.
The present invention also comprises a pressure cap, and pressure cap is convex cylindrical and has central through hole that bossing has external screw thread; Described body is made of first split and second split, first split, one end has external screw thread, being provided with internal thread hole, the first supporting positive cover installing hole and first hole of reeving, hole and first of reeving between the two ends is positioned at and is with an externally threaded end, the second split two ends all have external screw thread and central through hole, and central through hole is made of pressure cap installing hole, the second supporting positive cover installing hole and second hole of reeving; All have the prominent edge of two annulars on the equal in length of first, second supporting positive cover and the outer wall; First supporting positive cover is placed in the first supporting positive cover installing hole and second termination of first detonating fuse is passed by first hole of reeving, described pressure cap, second supporting positive cover are placed in the described pressure cap installing hole and the second supporting positive cover installing hole respectively and reeve by second in second termination of described second detonating fuse passes in the hole, the external screw thread of first split is connected with last perforating gun, and another male end of second split is connected with following perforating gun.
According to the present invention, described ignition charge is successively increased progressively by described body port to the drug-pressuring pressure between the described propagation squib.
Beneficial effect of the present invention is embodied in the following aspects.
(1) the present invention by body with two detonating fuses, two detonating primers and energizer organically are connected as a single entity and have replaced the connection gun joint of existing perforating gun string, because energizer is made of ignition charge and propagation squib and can be by detonation wave, combustion wave and flame gas reliable ignition, therefore, behind the detonating fuse and detonating primer effect that is connected with last perforating gun, what no matter export is detonation or combustion flame, can both ignite the ignition charge of energizer reliably, continuous increase along with the drug-pressuring pressure of ignition charge, detonation wave speed also constantly increases, ignite propagation squib immediately again reliably, the detonation wave of propagation squib output is then ignited detonating primer or the detonating fuse that links to each other with a following perforating gun.Under the energizer effect between per two perforating guns, can guarantee the maximum perforation power of perforating bullet, and then increase the one-time success rate of perforating job.
(2) the present invention is by two supporting positive covers and the centralizing function of setting upright circle, guarantee to have good concentricity between energizer and two detonating primers, thereby guaranteed the energization effect of energizer, in addition, ignition charge in the energizer has adopted different drug-pressuring pressures, can mate the energy that is installed in two detonating primers in perforating gun and the following perforating gun thus, thereby the propagation of explosion sequence that makes perforating gun string guarantees that with stable detonation energy transmission the perforating bullet in the perforating gun has the maximum puncture effect.
(3) the invention provides the detonation energization explosion-propagating device of single joint and two kinds of form of structure of twin adapter, can select one of them device according to the connect difference of rifle mode of perforating gun.Adopt perforating gun string of the present invention promptly to need not to increase the perforation element in the structure that neither changes existing perforating gun string, the difficulty that does not yet increase perforating application does not promptly increase on the basis of perforation blind area, has solved the problem of reliable perforation of existing perforating gun string and the reliable propagation of explosion of interlayer gun substantially; Can avoid well because of the loss in transmittance process of the deficiency of boosting explosive material self-energy and detonation wave energy, perforation that decay causes not exclusively, the generation of the accidents of doing over again such as card rifle, increased the reliability of perforation, and improved the safety of perforation completion.
Description of drawings
Fig. 1 is that the structure of detonation energization explosion-propagating device first preferred embodiment is formed schematic diagram.
Fig. 2 is the body construction schematic diagram shown in Fig. 1.
Fig. 3 is the supporting positive cover structural representation shown in Fig. 1.
Fig. 4 is the energizer structural representation shown in Fig. 1.
Fig. 5 first preferred embodiment of the invention and the annexation of perforating gun up and down.
Fig. 6 is that the structure of detonation energization explosion-propagating device second preferred embodiment is formed schematic diagram.
Fig. 7 is the annexation schematic diagram of first split shown in Fig. 6 and second split.
Fig. 8 is a second preferred embodiment of the invention and the annexation of perforating gun up and down.
The specific embodiment
The present invention is described in further detail below in conjunction with accompanying drawing and preferred embodiment.
As shown in Figure 1, first preferred embodiment of the invention is comprising body 1, energizer 3, the first supporting positive cover 6-1, the second supporting positive cover 6-2, two detonating fuse 7-1 and 7-2, two detonating primer 8-1 and 8-2, setting upright circle 15 of single joint detonation energization explosion-propagating device.Body 1 has the cylinder on a circle evagination edge and selects the 35CrCo material for use for the middle part, its inside is provided with five installing holes that communicate along axis, evagination is along being equipped with two seal grooves and external screw thread on the external cylindrical surface of both sides, evagination is along being provided with two symmetrically arranged Card trough 1A that use when well head hangs rifle, this groove is a square groove, its hem width 18～22mm, dark 9～20mm.Five installing holes on the body 1 are respectively the first, second, third, fourth and the 5th installing hole (pressing Fig. 2 definition) by left end to right-hand member, the boss of consolidating diving board 5 or 11 in the size of the first and the 5th installing hole and the perforating gun is complementary, and the overall dimensions of the overall dimensions of the 3rd installing hole and energizer 3 are complementary.The first supporting positive cover 6-1 and the second supporting positive cover 6-2 all can be made by common 45 steel or nonmetals, identical but the second supporting positive cover 6-2 length longer (referring to Fig. 3) of both form of structure, promptly an end has external screw thread and centre bore is made of cylindrical hole and bellmouth, the small end of bellmouth links to each other with cylindrical hole, the diameter of cylindrical hole is 6.9～7mm, and just in time the external diameter with detonating primer 8-1,8-2 is complementary.The effect of this centre bore is that detonating fuse 7-1,7-2 and detonating primer 8-1,8-2 are set upright, and eccentric minimum between two detonating primers guaranteed reliable propagation of explosion between the perforating gun 9,10.Energizer 3 contains housing 12 and igniting propagation squib 13 (referring to Fig. 4).Housing 12 is the cylindrical housings that adopt common 45 steel to process, and its outer wall has circumferential recess 12A and circular orientation face.Igniting propagation squib 13 is made of body 13A, ignition charge 11 and propagation squib 14, highdensity detonating explosive is housed in the propagation squib 14, propagation squib 14 is loaded on the end of body 13A, ignition charge 11 is pressed among the body 13A and by body 13A port to the drug-pressuring pressure between the propagation squib and successively increases progressively, near the pressure maximum at propagation squib 14 places.To light a fire that propagation squib 13 is fixed in the housing 12 and guarantee propagation squib 14 align with the smaller diameter end of housing 12 (in one plane promptly) with cementing agent.Article two, detonating fuse 7-1,7-2 and two detonating primer 8-1,8-2 are general detonating primer of perforating gun string and detonating fuse.Setting upright circle 15 adopts temperature-resistant materials such as rubber ring or annular felt pan to make.
According to shown in Figure 5, carry out perforating job before, the following process of first preferred embodiment of the invention case and perforating gun can be formed perforating gun string.After the middle part of the first detonating fuse 7-1 is installed in the perforating bullet of perforating gun 9, its two ends is passed by the centre bore two ends of the solid diving board 5 of last perforating gun respectively, one of them termination is connected with the end of the first detonating primer 8-1, and another termination then is connected with the other end of the second detonating primer 8-2 in second detonation energization explosion-propagating device that its top matches between perforating gun; After the middle part of the second detonating fuse 7-2 is installed in down the perforating bullet of perforating gun 10, two ends is passed at the two ends of the centre bore of diving board 11 admittedly by last perforating gun respectively, one of them termination is connected with the end of the second detonating primer 8-2, and another termination then is connected with the other end of the second detonating primer 8-2 in the 3rd detonation energization explosion-propagating device that its below matches between perforating gun; First, second detonating primer 8-1,8-2 insert the centre bore of first, second supporting positive cover 6-1,6-2 respectively, the male end of the first supporting positive cover 6-1 is connected with solid diving board 5 boss of last perforating gun, and the external screw thread of the second supporting positive cover 6-2 is connected with the boss of the solid diving board 11 of following perforating gun.Put for four seal grooves on the body 1 will to descend again behind the sealing ring that connecting threads are connected with the external screw thread of body 1 one ends in the perforating gun 10, the boss of the solid diving board 11 of following perforating gun is positioned in the 5th installing hole in the body 1, the second supporting positive cover 6-2 has been placed in the 4th installing hole in the body 1, to set upright circle 15 again and be installed in the 3rd installing hole of energizer 3 usefulness special tools being shifted behind the circumferential recess 12A of housing 12 onto body 1 and and set upright, and make the end that propagation squib 14 is housed adjacent with the second detonating primer 8-2 by setting upright circle 15.Perforating gun 9 connects with the external screw thread of body 1 other end, the protruding end of the solid diving board 5 of last perforating gun is positioned in first installing hole in the body 1, and the first supporting positive cover 6-1 is enclosed in second installing hole of body 1, make the ignition charge end of end that the first detonating primer 8-1 is housed and energizer 3 adjacent.
It is the twin adapter detonation energization explosion-propagating device that Fig. 6 shows second preferred embodiment of the invention and different is first preferred embodiment, second preferred embodiment has increased a pressure cap 4, and body 1 is made of two split 1-1,1-2 and the external form of supporting positive cover 6-1,6-2 changes to some extent.Pressure cap 4 is for having the convex cylindrical of central through hole, and bossing has external screw thread and seal groove, and energizer 3 is bonded in the central through hole of pressure cap 4 and by setting upright circle 15 and sets upright.The equal in length of two supporting positive cover 6-1,6-2 and outer wall change the prominent edge of two annulars into by external screw thread.The outer wall of the first split 1-1 is the cylinder (referring to Fig. 7) of two diameters, have two seal grooves and external screw thread on the small cylinder, three holes and the largest hole that are provided with by small cylinder to large cylinder direction that diameter changes from small to big one by one are screw, inferior macropore is the first supporting positive cover installing hole, and aperture is first hole of reeving.The external form of the second split 1-2 is identical with the external form of body 1, but its centre bore is diameter three holes from large to small to be formed, maximum installing hole is the pressure cap installing hole, its overall dimensions and pressure cap 4 are complementary and this hole also is provided with circular orientation face, internal thread and seal groove, inferior macropore is the second supporting positive cover installing hole, and minimum aperture is second hole of reeving.Install in the pressure cap installing hole that is screwed into the second split 1-2 behind the sealing ring on the pressure cap 4 and both circular orientation faces contact.
According to shown in Figure 8, when needing to form perforating gun string when carrying out perforating job, first, the second detonating fuse 7-1, the termination of 7-2 is respectively from last, the solid diving board 5 of following perforating gun, 11 centre bore passes back and corresponding first, the second detonating primer 8-1, after 8-2 connects, the external screw thread of the external screw thread of the first split 1-1 and the second split 1-2 respectively with perforating gun 9,10 internal thread connects, first, the second supporting positive cover 6-1,6-2 is placed on first respectively, in the second supporting positive cover installing hole, first, the second detonating fuse 7-1,7-2 and corresponding detonating primer 8-1 thereof, 8-2 is passed by first of the first split 1-1 second of the hole and the second split 1-2 hole of reeving of reeving respectively, and correspondingly inserts first, in the centre bore of second supporting positive cover.After putting sealing ring for two seal grooves on the second split 1-2, be connected with the internal thread of the first split 1-1.
Claims (4)
1. detonation energization explosion-propagating device for perforating gun string, comprise body [1], two detonating primers [8-1,8-2] and two detonating fuses [7-1,7-2], it is characterized in that: also comprise energizer [3], two supporting positive covers [6-1,6-2] and set upright circle [15], once be provided with first to the 5th installing hole that communicates between described body [1] two ends, body [1] outer wall two ends are provided with external screw thread; Described energizer [3] comprises housing [12] and contains the igniting propagation squib [13] of body [13A], ignition charge [11] and propagation squib [14], an end and ignition charge [11] that propagation squib [14] is positioned at body [13A] are pressed into body [13A], housing [12] outer wall has cannelure [12A] and the described circle [15] of setting upright is installed, body [13A] be fixed in the endoporus of housing [12] and an end of propagation squib [14] concordant with an end face of housing [12]; Small end and cylindrical hole that described supporting positive cover [6-1,6-2] has cylindrical hole and taper hole and taper hole join; First, second detonating primer [8-1,8-2] respectively and correspondence be contained in the cylindrical hole of first, second supporting positive cover [6-1,6-2], first termination of first, second detonating fuse [7-1,7-2] respectively and corresponding be connected with first, second detonating primer [8] and second termination by drawing in the described taper hole; Described first supporting positive cover [6-1], described energizer [3] and described second supporting positive cover [6-2] all are placed in the described body [1], wherein, first supporting positive cover [6-1] is arranged in first and second installing holes, energizer [3] is arranged in the 3rd installing hole and sets upright by the described circle [15] of setting upright, second supporting positive cover [6-2] be arranged in the 4th and the 5th installing hole and described second detonating primer adjacent with described propagation squib [14]; When described detonation energization explosion-propagating device and perforating gun composition perforating gun string, two external screw threads of described body [1] are connected with following perforating gun [10] with last perforating gun [9] respectively, second termination of first detonating fuse [7-1] links to each other with second detonating primer [8-2] in second detonation energization explosion-propagating device that installs this perforating gun top after via the perforating bullet of last perforating gun [9], and second termination of second detonating fuse [7-2] links to each other with first detonating primer [8-1] in second detonation energization explosion-propagating device of this rifle below installation after via the perforating bullet of perforating gun [10] down.
2. detonation energization explosion-propagating device for perforating gun string according to claim 1 is characterized in that: an end of described first, second supporting positive cover [6-1,6-2] all has the length of the length of external screw thread and first supporting positive cover [6-1] greater than second supporting positive cover [6-2]; When forming perforating gun string, the external screw thread of described first supporting positive cover [6-1] is connected with the boss of the solid diving board [5] of last perforating gun [9] and this boss is positioned in first installing hole of described body [1], and the external screw thread of described second supporting positive cover [6-2] is connected with the boss of the solid diving board [11] of rifle of following perforation [10] and this boss is positioned in the 5th installing hole of described body [1].
3. detonation energization explosion-propagating device for perforating gun string according to claim 1 is characterized in that: also comprise a pressure cap [4], pressure cap [4] is for convex cylindrical and have central through hole, and bossing has external screw thread; Described body [1] is made of first split [1-1] and second split [1-2], first split [1-1] end has external screw thread, being provided with screw, the first supporting positive cover installing hole and first hole of reeving, hole and first of reeving between the two ends is positioned at and is with an externally threaded end, second split [1-2] two ends all have external screw thread and central through hole, and central through hole is made of pressure cap installing hole, the second supporting positive cover installing hole and second hole of reeving; All have the prominent edge of two annulars on equal in length of first, second supporting positive cover [6-1,6-2] and the outer wall; First supporting positive cover [6-1] is placed in the first supporting positive cover installing hole and second termination of first detonating fuse [7-1] is passed by first hole of reeving, described pressure cap [4], second supporting positive cover [6-2] are placed in the described pressure cap installing hole and the second supporting positive cover installing hole respectively and reeve by second in second termination of described second detonating fuse [7-2] passes in the hole, the external screw thread of first split [1-1] is connected with last perforating gun [9], and another male end of second split [1-2] is connected with following perforating gun [10].
4. according to claim 1 or 2 or 3 described detonation energization explosion-propagating device for perforating gun string, it is characterized in that: described ignition charge [11] is successively increased progressively by described body [13A] port to the drug-pressuring pressure between the described propagation squib [14].
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| CN200910170879.3A CN101691837B (en) | 2009-09-11 | 2009-09-11 | Detonation energization explosion-propagating device for perforating gun string |
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| CN200910170879.3A CN101691837B (en) | 2009-09-11 | 2009-09-11 | Detonation energization explosion-propagating device for perforating gun string |
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| CN101691837A true CN101691837A (en) | 2010-04-07 |
| CN101691837B CN101691837B (en) | 2014-08-27 |
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Effective date of registration: 20160810 Address after: 710061 No. 213 rosefinch Avenue, Yanta District, Shaanxi, Xi'an Patentee after: Xi'an Wuhua Energy Exploding Equipment Co.,Ltd. Address before: 710061 No. 213 rosefinch Avenue, Yanta District, Shaanxi, Xi'an Patentee before: No.213 Research Institute of China North Industries Group Corporation |