CN102410005B - Bidirectional energization explosion-propagating device - Google Patents
Bidirectional energization explosion-propagating device Download PDFInfo
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- CN102410005B CN102410005B CN201110399105.5A CN201110399105A CN102410005B CN 102410005 B CN102410005 B CN 102410005B CN 201110399105 A CN201110399105 A CN 201110399105A CN 102410005 B CN102410005 B CN 102410005B
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Abstract
The invention discloses a bidirectional energization explosion-propagating device, belonging to the field of blasting supplies for oil and gas wells. The explosion-propagating device includes a clapboard with a symmetrical explosive loading structure, a clapboard coat with an explosion-expanding hole and a clapboard fixing member with an explosion-expanding hole, wherein explosion-expanding tubes and detonators in parallel with each other are installed at two ends of the clapboard, high explosive is filled in the explosion-expanding tubes in a pressing manner, initiating explosive filled in the clapboard is transmitted to the explosion-expanding tubes through the high explosive, the clapboard is positioned between the clapboard coat and the clapboard fixing member, and the two explosion-expanding tubes are respectively aligned to the two explosion-expanding holes. According to the bidirectional energization explosion-propagating device, any one of the two ends can integrate the dual effects of high initiating sense degree and strong initiating ability, and the problem of bidirectional energization explosion-propagating in traditional oil and gas well perforations is solved; not only the success rate of first-time downhole perforating is improved, but also the construction cost is saved; and simultaneously the bidirectional energization explosion-propagating device has the advantage of more convenience and more safety for use.
Description
Technical field
The present invention relates to a kind of Oil/gas Well explosive, relate in particular to a kind of Bidirectional energization explosion-propagating device.
Background technology
In perforating oil gas well, in order to improve efficiency of construction, conventionally the requirement branched perforating gun (prop up not from tens to hundreds of etc.) of once going into the well, penetrates out all target zones.By connection gun joint, all perforating guns are connected in series, form rice up to a hundred, even go up the perforating gun string of km.Every joint perforating gun is to lean on a detonating fuse propagation of explosion and ignite perforating bullet to reach perforation object.
US Patent No. P 4616566 disclose a kind of between perforating gun and perforating gun by two induced detonation methods that only fill the two-way detonating primer of high explosive, be that detonating fuse two ends in every joint perforating gun are connected with two-way detonating primer respectively, then the two-way detonating primer of adjacent two rifles put into respectively to connection gun joint propagation of explosion hole.If certain rifle is blasted, the detonating fuse in it is ignited the two-way detonating primer A being attached thereto, two-way detonating primer A induced detonation is adjacent is with it connected in the two-way detonating primer B on another rifle detonating fuse, the detonating fuse that two-way detonating primer B detonates and is attached thereto, detonating fuse is ignited the perforating bullet in this perforating gun again, detonation wave in a rifle is passed to another perforating gun like this, thus the perforating gun that makes hundreds of series connection successively steady detonation go down.According to the needs of gun perforation process, perforating gun string can, from rifle head or gun breech, even detonate in the middle of rifle string.In order to improve the success rate of a perforation, longer perforating gun is ganged up the several initiators of normal use perforating gun string diverse location is detonated respectively.Therefore, the amphicheirality of detonating primer (not distinguishing propagation of explosion direction), reliability and safety are vital to perforating job.
Yet as the two-way detonating primer of one of perforating gun string propagation of explosion sequence critical piece, the reliability of its propagation of explosion is subject to the restriction of following factor.One, owing to can having certain distance between its upper and lower detonating primer in assembling process, in addition due to downhole temperature higher (conventionally more than 100 ℃), detonating fuse has certain amount of contraction, strengthened so again air gap distance between upper and lower two-way detonating primer, its detonation propagation reliability of nonel tube is declined; Its two, the propagation of explosion hole machining accuracy reason due to connection gun joint, makes two-way detonating primer in use inevitably have eccentric phenomena, when eccentric serious, by the detonating primer of induced detonation, is difficult to complete detonation, thereby affects normally detonating of next joint rifle detonating fuse.Its three, if the detonating fuse detonation energy in upper joint rifle is not enough, can make the two-way detonating primer detonation completely that is attached thereto, thereby affect its induced detonation to the two-way detonating primer of next joint rifle.They are four years old, what is more important, the amphicheirality of this detonating primer (only filling high explosive) has determined that the upper and lower detonating primer of mutual induced detonation must adopt identical charge constitution, be that upper and lower detonating primer is identical, this makes the fan-out capability of induced detonation detonating primer and is become in design conflict by the Impact Initiation sensitivity of induced detonation detonating primer, strong the and Impact Initiation sensitivity height of fan-out capability both can not take into account.This design defect will inevitably limit the reliability of two-way detonating primer.
In order to improve the reliability of propagation of explosion between perforating gun, have at present several design schemes, but all cannot realize two-way propagation of explosion function.Chinese patent ZL 02262272.1 has proposed Combined booster design scheme to substitute traditional two-way detonating primer.Priming and high explosive are housed in this Combined booster, and this can improve the reliability of propagation of explosion undoubtedly, but because upper and lower Combined booster adopts different charge constitutions, therefore axially in propagation of explosion, cannot realize two-way propagation of explosion function.Also there is similar Combined booster product in U.S. Irving company etc.Publication number is the energization explosion-propagating scheme that the Chinese patent application of CN 201531258 U has also proposed similar ZL 02262272.1, but the energizer one end in this scheme is ignition charge (responsive powder charge), the other end is propagation squib (insensitiveness powder charge), detonation wave, combustion wave or shock wave etc. can only detonate from ignition charge one end one direction, propagation of explosion, otherwise can produce artificial disconnected quick-friedly, so it can only carry out one direction energization explosion-propagating.Because perforating oil gas well can only adopt axial propagation of explosion mode, therefore cannot carry out simple combination to the energizer in the Combined booster in ZL 02262272.1 and CN 201531258 U realizes two-way energization explosion-propagating.In addition; in above two patents, the priming of Combined booster or the ignition charge in energizer (responsive medicament) all, in connection gun joint propagation of explosion hole axial location, can not get effective protection; have the potential safety hazard of accidental ignition, this has also limited being widely used of it.Although the isolation propagation of explosion device in patent ZL 01267493.1 has two-way propagation of explosion function, but because its responsive powder charge (priming) is in dividing plate bottom, and covered by insensitiveness powder charge (high explosive), sensitivity to initiation is poor, from propagation of explosion aspect, it is similar to a traditional two-way detonating primer, without the effect of energization.Because perforating oil gas well rifle string is longer, well temperature is higher, conventionally requires all can detonate from perforating gun string two ends different directions, guarantees the success rate of a perforation, obviously, above two kinds of patents and similar products more both domestic and external all can not meet the requirement of perforating oil gas well to two-way energization explosion-propagating.Up to the present, axially in propagation of explosion sequence, there is not yet detonation energization and the fine technical scheme of taking into account of two-way propagation of explosion.
Summary of the invention
The technical problem to be solved in the present invention is that the shortcoming for current existing Oil/gas Well with the one direction energization explosion-propagating of Combined booster and energization explosion-propagating device, provides a kind of and can realize two-way energization explosion-propagating device.
For solving the problems of the technologies described above, Bidirectional energization explosion-propagating device provided by the invention comprises and contains dividing plate overcoat, dividing plate firmware and contain dividing plate body, two propagation squibs, the dividing plate of two detonators, on two end faces of described dividing plate body, all having the ladder blind hole being parallel to each other completes a business transaction with the macropore of ladder blind hole mutually with straight blind hole and straight blind hole, described propagation squib is by the shell of both ends open, block and high explosive form, high explosive is press fit in shell, one end of shell is pressed into block and the other end retains open state, bonding detonator in described straight blind hole, in the aperture of described staged blind hole, load successively priming and high explosive, bonding propagation squib in the macropore of staged blind hole, the block end of propagation squib and the input of detonator are towards nose end mouth and all lower than dividing plate body end face 1mm～2mm, described dividing plate overcoat is convex cylindrical body, and small column end face is provided with centre bore, and big column end face center is provided with to expand blast hole and expand blast hole and communicates with centre bore, described dividing plate firmware is U-shaped structural member, and its outer cylinder is with the screw thread being connected with the male joint of connection rifle, and bottom centre is provided with expansion blast hole, after the dress sealing ring of described dividing plate stage casing, be placed in the centre bore of dividing plate overcoat, described dividing plate firmware is enclosed within on the small column of described dividing plate overcoat and both are connected, and the expansion blast hole that dividing plate puts outward and the expansion blast hole on dividing plate firmware are respectively over against two propagation squibs in described dividing plate.
In the present invention, the diameter of described expansion blast hole and the equal diameters of described propagation squib.Described propagation squib is of a size of φ 10mm * 12mm, and pressing density is 1.66g/cm
3.
Beneficial effect of the present invention is embodied in the following aspects:
(1) Bidirectional energization explosion-propagating device of the present invention is assemblied in the connection gun joint of perforating gun string, between two two-way detonating primers in connection gun joint.Its two-way energization shows following several aspect: one, because this installs arbitrary end, all to have insensitiveness powder charge be that propagation squib and responsive powder charge are detonator simultaneously, so its arbitrary end all has the high and strong dual-use function of initiating ability of sensitivity to initiation concurrently.When the axial energy shortage of exporting of perforating gun, as low velocity detonation ripple, combustion wave or reduced blast etc., this device all can change into it normal detonation wave, thereby makes the present invention play the effect of amplifying detonation wave energy that promotes.Combustion wave or reduced blast etc. are during by propagation of explosion device of the present invention, the detonator of its one end is blasted, cap sensitive is parallel adjacent propagation squib with it, the propagation squib of the propagation squib blast initiation dividing plate other end, this propagation squib is exported normal detonation wave, ignite two-way detonating primer, detonating fuse and the perforating bullet of adjacent lower joint perforating gun with it, make propagation of explosion normally be stablized propagation of explosion and go down.Its two, detonation fan-out capability of the present invention is that induced detonation ability is to be realized by the larger propagation squib of diameter.Obviously, its induced detonation ability will be higher than traditional two-way detonating primer.They are three years old, because device of the present invention adopts symmetrical charge constitution, therefore this energy increasing function and propagation of explosion are regardless of direction (two-way), no matter from which end of perforating gun string detonate, all can realize the dual-use function of energization and propagation of explosion, meet the construction process requirement of the two-way energization explosion-propagating of perforating oil gas well.
(2) the present invention can also carry out isolating seal to unexploded perforating gun.Just in case perforating gun detonates from one end, failure or propagation of explosion interrupt, and this propagation of explosion device can make unexploded perforating gun not polluted by well liquid, can from the other end of perforating gun string, detonate and complete perforation, has avoided dead chick hole and has saved construction cost.
(3) though propagation of explosion device of the present invention is equipped with detonator, because detonator is not in propagation of explosion hole, and be subject to the protection of dividing plate overcoat and dividing plate firmware, therefore, except the mode effects such as detonation wave, flame, shock wave, the external world is difficult to stimulate to detonator make it ignition.Therefore propagation of explosion device of the present invention is very safe in use.
Accompanying drawing explanation
Fig. 1 is that the structure of Bidirectional energization explosion-propagating device of the present invention forms schematic diagram.
Fig. 2 is that the diaphragm structure shown in Fig. 1 forms schematic diagram.
Fig. 3 is the dividing plate body construction schematic diagram shown in Fig. 2.
Fig. 4 is that the propagation squib shown in Fig. 2 forms schematic diagram.
Fig. 5 is the dividing plate jacket structure schematic diagram shown in Fig. 1.
Fig. 6 is the dividing plate firmware structure schematic diagram shown in Fig. 1.
Fig. 7 is the schematic diagram that is related to of Bidirectional energization explosion-propagating device of the present invention and perforating gun string.
The specific embodiment
Below in conjunction with accompanying drawing and preferred embodiment, the present invention is described in further detail.
As shown in Figure 1, Bidirectional energization explosion-propagating device provided by the invention comprises dividing plate 1, dividing plate overcoat 2, dividing plate firmware 3 and screw 4.Dividing plate 1 is assemblied in dividing plate overcoat 2 and dividing plate firmware 3, and with screw 4, above three is connected as one.
As shown in Figure 2, dividing plate 1 contains dividing plate body 5, two propagation squibs 6, two detonators 7.Dividing plate body 5, for cylinder (referring to Fig. 3) and cylinder are provided with two seal grooves, all have the ladder blind hole 11 being parallel to each other and completes a business transaction mutually with the macropore of ladder blind hole 11 with straight blind hole 12 and straight blind hole 12 on two end faces of dividing plate body 5.Propagation squib 6 forms (referring to Fig. 4) by shell 13, block 14 and the high explosive 8 of both ends open, and shell 13 and block 14 all select aluminium to make, and shell 13 is of a size of φ 10mm * 12mm; High explosive 8 is press fit in shell 13, and it press-fits density is 1.66g/cm
3; One end of shell 13 is pressed into block 14 and the other end retains open state.In the aperture of 5 two staged blind holes 11 of dividing plate body, load successively priming 9 and high explosive 8; Detonator 7 is connected in straight blind hole 12 by heatproof is gluing, and propagation squib 6 is by the gluing macropore that is connected on staged blind hole 11 of heatproof, and the block end of propagation squib 6 and the input of detonator 7 are towards nose end mouth and all lower than dividing plate body 5 end face 1mm～2mm; Two sealing ring 10 correspondences are arranged in two seal grooves of dividing plate body 5.
As shown in Figure 5, dividing plate overcoat 2 is convex cylindrical body, its small column end face is provided with outside centre bore and this hole and is arranged with screw 17, the cylinder of big column is provided with two seals ring recess and sealing ring 16 is all installed, and is provided with expansion blast hole 15 and this expansion blast hole 15 that diameter equals propagation squib 6 communicates with centre bore at big column end face center.
As shown in Figure 6, dividing plate firmware 3 is U-shaped structural member, and its outer cylinder is threaded, and bottom centre is provided with that diameter equals the expansion blast hole 15 of propagation squib 6 and at outer driving hole 18 and the screw hole 19 of being arranged with of this expansion blast hole 15.
Again referring to Fig. 1, dividing plate 1 integral body is put into the centre bore of dividing plate overcoat 2, dividing plate firmware 3 is enclosed within on the small column of dividing plate overcoat 2 and by screw 4 and dividing plate overcoat 2 and is connected, and wherein, the expansion blast hole on dividing plate overcoat 2 and dividing plate firmware 3 is respectively over against two propagation squibs 6 in dividing plate 1.
Shown in Fig. 7, when single perforating gun forms perforating gun string, by following flow process, assemble: detonating fuse 22 in the first perforating gun 20 is passed and drawn from connection rifle male joint 21, then connection rifle male joint 21 is threaded with the first perforating gun 20.The detonating fuse of drawing 22 is inserted in two-way detonating primer 24, and with special tool by it locking, then detonating primer is put into supporting positive cover 23, finally supporting positive cover 23 is pushed in righting block set.Then with special spanner, device 25 of the present invention is screwed in connection rifle male joint 21.Equally, by the first perforating gun 20 and the assembly method of connection rifle male joint 21, connection rifle female joint 26 and the second perforating gun 27 are coupled together.Finally the connection rifle female joint 26 that connects good perforating gun is threaded with the connection rifle male joint 21 that connects good perforating gun.
If propagation of explosion direction is from the first perforating gun 20 to the second adjacent with it perforating gun 27, the energy that in the first perforating gun 20, detonating fuse 22 and two-way detonating primer 24 are axially exported, no matter be normal detonation wave, or the low velocity detonation ripple of energy shortage, combustion wave or reduced blast etc., while installing by this, in this device, the detonator 7 of one end is blasted, detonator 7 is ignited parallel adjacent propagation squib 6 with it, the propagation squib 6 of propagation squib 6 blast initiation dividing plate 1 other ends, this propagation squib 6 outputs detonation wave stronger than two-way detonating primer (induced detonation simultaneously with it adjacent another detonator 7), ignite the two-way detonating primer of the second adjacent perforating gun 27 with it, detonating fuse and perforating bullet, making it normal detonation goes down.This device can strengthen the not enough energy of upper joint perforating gun output or be transformed into normal stable detonation wave energy level, has realized the function of detonation wave energization.Due to the charge constitution scheme of this device employing full symmetric, therefore, conversely,, from the second perforating gun 27 to the first adjacent with it perforating gun 20, its result is also the same to propagation of explosion direction.
Claims (3)
1. a Bidirectional energization explosion-propagating device, comprise dividing plate overcoat (2) and dividing plate firmware (3), it is characterized in that: also comprise and contain dividing plate body (5), the dividing plate (1) of two propagation squibs (6) and two detonators (7), on two end faces of described dividing plate body (5), all having the ladder blind hole (11) being parallel to each other completes a business transaction with the macropore of ladder blind hole (11) mutually with straight blind hole (12) and straight blind hole (12), described propagation squib (6) is by the shell (13) of both ends open, block (14) and high explosive (8) form, high explosive (8) is press fit in shell (13), one end of shell (13) is pressed into block (14) and the other end retains open state, bonding detonator (7) in described straight blind hole (12), in the aperture of described ladder blind hole (11), load successively priming (9) and high explosive (8), bonding propagation squib (6) in the macropore of ladder blind hole (11), the input of the block end of propagation squib (6) and detonator (7) is towards nose end mouth and all lower than dividing plate body (5) end face 1mm～2mm, described dividing plate overcoat (2) is convex cylindrical body, and small column end face is provided with centre bore, and big column end face center is provided with to expand blast hole and expand blast hole and communicates with centre bore, described dividing plate firmware (3) is U-shaped structural member, and its outer cylinder is with the screw thread being connected with the male joint of connection rifle, and bottom centre is provided with expansion blast hole, after described dividing plate (1) stage casing dress sealing ring (10), be placed in the centre bore of dividing plate overcoat (2), described dividing plate firmware (3) is enclosed within on the small column of described dividing plate overcoat (2) and both are connected, and the expansion blast hole on the expansion blast hole on dividing plate overcoat (2) and dividing plate firmware (3) is respectively over against two propagation squibs (6) in described dividing plate (1).
2. Bidirectional energization explosion-propagating device according to claim 1, is characterized in that: the equal diameters of the diameter of described expansion blast hole and described propagation squib (6).
3. Bidirectional energization explosion-propagating device according to claim 1 and 2, is characterized in that: described propagation squib (6) is of a size of φ 10mm * 12mm, and pressing density is 1.66g/cm
3.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110399105.5A CN102410005B (en) | 2011-12-05 | 2011-12-05 | Bidirectional energization explosion-propagating device |
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| CN201110399105.5A CN102410005B (en) | 2011-12-05 | 2011-12-05 | Bidirectional energization explosion-propagating device |
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| CN102410005A CN102410005A (en) | 2012-04-11 |
| CN102410005B true CN102410005B (en) | 2014-04-02 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104863551B (en) * | 2015-05-27 | 2017-12-08 | 西安物华巨能爆破器材有限责任公司 | A kind of two-way detonating primer of Oil/gas Well superhigh temperature |
| CN113175853B (en) * | 2021-04-16 | 2022-06-28 | 南京理工大学 | Double-axial flame input and single-output detonator |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4616566A (en) * | 1984-10-05 | 1986-10-14 | Halliburton Company | Secondary high explosive booster, and method of making and method of using same |
| CN2511790Y (en) * | 2001-10-12 | 2002-09-18 | 中国航天科技集团公司川南机械厂 | Isolative booster device for intermediate gun perforator |
| CN201031674Y (en) * | 2007-04-20 | 2008-03-05 | 蓬莱市茂企石油机械有限公司 | Horizontal well externally oriented perforating gun orientation link |
| CN101148982A (en) * | 2006-09-21 | 2008-03-26 | 史慧生 | Side direction detonation symmetrical bidirectional perforator |
| CN201428439Y (en) * | 2009-06-30 | 2010-03-24 | 禹栽星 | Energy-increased explosion enlargement type perforating gun single connector |
| CN201531258U (en) * | 2009-09-11 | 2010-07-21 | 中国兵器工业第二一三研究所 | Detonating and energizing explosion-propagating device for perforating gun strings |
| CN202417452U (en) * | 2011-12-05 | 2012-09-05 | 西安物华巨能爆破器材有限责任公司 | Bidirectional energizing explosion propagating device |
-
2011
- 2011-12-05 CN CN201110399105.5A patent/CN102410005B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4616566A (en) * | 1984-10-05 | 1986-10-14 | Halliburton Company | Secondary high explosive booster, and method of making and method of using same |
| CN2511790Y (en) * | 2001-10-12 | 2002-09-18 | 中国航天科技集团公司川南机械厂 | Isolative booster device for intermediate gun perforator |
| CN101148982A (en) * | 2006-09-21 | 2008-03-26 | 史慧生 | Side direction detonation symmetrical bidirectional perforator |
| CN201031674Y (en) * | 2007-04-20 | 2008-03-05 | 蓬莱市茂企石油机械有限公司 | Horizontal well externally oriented perforating gun orientation link |
| CN201428439Y (en) * | 2009-06-30 | 2010-03-24 | 禹栽星 | Energy-increased explosion enlargement type perforating gun single connector |
| CN201531258U (en) * | 2009-09-11 | 2010-07-21 | 中国兵器工业第二一三研究所 | Detonating and energizing explosion-propagating device for perforating gun strings |
| CN202417452U (en) * | 2011-12-05 | 2012-09-05 | 西安物华巨能爆破器材有限责任公司 | Bidirectional energizing explosion propagating device |
Non-Patent Citations (2)
| Title |
|---|
| 林玉玺等.水平井射孔技术在TZ16-7井的应用.《油气井测试》.2001,第10卷(第04期), * |
| 郭希明等.油管输送式射孔技术起爆方式的设计与应用分析.《重庆科技学院学报(自然科学版)》.2011,第13卷(第03期), * |
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