CN2260168Y

CN2260168Y - Petroleum perforation device with ring-like ignition struction

Info

Publication number: CN2260168Y
Application number: CN 95207136
Authority: CN
Inventors: 史慧生
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-04-04
Filing date: 1995-04-04
Publication date: 1997-08-20
Anticipated expiration: 2005-04-04

Abstract

The utility model relates to a petroleum perforating device with a ring-shaped ignition structure, which comprises a cartridge case and a liner which is arranged in the cartridge case; explosive is filled in space which is formed by the cartridge case and the liner. The utility model is characterized in that a plurality of radial symmetric detonating explosive strips are arranged on the inner surface of the cartridge case, symmetric circular igniting rings are arranged at a mouth part, and the ignition at the mouth part of a perforating bullet can be realized by the common effects of the detonating explosive strips and the circular igniting rings. The utility model can greatly reduce the length of petroleum perforating bullets.

Description

Petroleum perforator with peripheral initiation structure

The utility model relates to a kind of Primary Component that underground petroleum layer and oil pipe are connected effectively and communicate, and drives metal jet by explosive charge specifically, penetrates buried oil pipe line, cement sheath, and the petroleum perforator of oil reservoir on every side.

When oil exploration and oil recovery, to carry out drilling well and setting of casing earlier to the oil field as shown in Figure 1, again reinforcing with cement between sleeve pipe and the stratum, also cry " Gu also " usually.Then the perforating gun that perforator is housed is lowered to the suitable degree of depth in the sleeve pipe, makes perforator detonation perforation between tube wall and oil reservoir that explosive is housed, technical requirements is in the perforation process, does not destroy perforating gun and sleeve pipe, penetrates dark as far as possible duct in oil reservoir.The perforator device is made up of shell case, explosive and cavity liner as shown in Figure 2.Present problem is that the space in the perforating gun is too little, make that enforcement large aperture perforation, composite gun perforation or high hole dense perforation difficulty are very big, even can't realize therefore how to dwindle the height of petroleum perforation charge at all, save the usefull space in the perforating gun, become the important topic of perforator design.

The utility model is exactly in order to address the above problem, the petroleum perforator that provides a kind of band shape to detonate structure, detonating into oral area detonates in the top that becomes common piercing bullet, can shorten the length of perforating bullet significantly under the preceding topic that does not change the cavity liner penetration performance substantially.

The purpose of this utility model is to realize like this.A kind of petroleum perforator, the explosive that high density is pressed into whole bulk is equipped with in the formed space of cavity liner that comprises shell case and be loaded in the shell, its design feature is to leave some quick-fried grooves of leading at shell case inner surface sidewall, by rise blast hole to around be radial symmetrical distribution, leading quick-fried slot cross-section is semicircle, the smooth surface of triangle or other analogous shape.One cannelure is arranged leading quick-fried groove lower end.Cannelure communicates with leading quick-fried groove, perpendicular to shell case axis and parallel in the shell case oral area.Filling to add in leading quick-fried groove and cannelure has high sensitivity, fine grained propagation of explosion high explosive.Scribble one deck flame proof film at shell case inner surface and propagation of explosion high explosive surface.

Owing to adopted such scheme, the utlity model has the petroleum perforation charge of peripheral initiation structure, be the time break of detonating fuse to be passed near the shell case oral area the ring that detonates by the primer bar, encircle the main charge of the perforating bullet that detonates then by detonating.The main charge of perforating bullet is to detonate at the oral area ring place of detonating like this, and detonation is propagated the cavity liner that crushes successively by oral area to the top then.Because the movement velocity of cavity liner is much smaller than the detonation rate of explosive, therefore, when detonation propagates into the summit, promote the cavity liner top when travelling forward, the cavity liner of oral area also to the axis direction motion, has become " small-angle " by " big cone angle ".Owing to adopted above structure, make the length of perforating bullet and diameter ratio by original 1-1.2, shorten to present 0.5-0.7.

Below in conjunction with drawings and Examples the utility model is elaborated.

Fig. 1 is the oil well schematic diagram of oil exploration and oil recovery.

Fig. 2 is a common petroleum perforator structural representation.

Fig. 3 is the detonate petroleum perforator schematic diagram of structure of the utility model band shape.

Fig. 4 is the internal construction of the utility model perforator.

Fig. 5 is the sectional drawing of the utility model shell case.

Shown in Figure 1, when petroleum recovering, be to setting of casing pipe 1 behind the oil drilling, again reinforcing with cement sheath 2 between sleeve pipe 1 and the oil reservoir (plot) 3.Then perforator 5 is packed in the perforating gun 4, reach the suitable degree of depth in the following insertion sleeve pipe 3.As shown in Figure 2, make the perforator 5 that explosive 506 is housed, between tube wall and oil reservoir, ignite perforation.Drug-shaped cover 507 will form metal jet with the speed of necessarily crushing, puncture tube wall and cement sheath and stratum in the perforation process, set up siphunculus between sleeve pipe and oil reservoir, and the unvenile water in the oil reservoir is flowed out.

Fig. 3 is the embodiment of utility model, its design feature be the inner surface at shell case 501 leave 6 radial symmetrical distributions of 6-1 lead quick-fried groove (5012), leading quick-fried groove 5012 tops joins by a booster

explosive film

505 and 5011 of a seam broken, bottom communicates with the cannelure 5013 that detonates, lead quick-fried well width 0.5-5 millimeter, thickness 0.1-1 millimeter.Cannelure 5013 width 2-5 millimeters, the degree of depth is the 0.5-2 millimeter.Primer bar 503 detonate the ring 504 and booster explosive film 505 all by high sensitivity, the fine grained high explosive is formed, filling is led in quick-fried groove 5012 and the cannelure 5013 in shell case 501 inner surfaces, the inner surface of shell case 501 and high sensitivity, scribbles one deck flame proof film above the fine grained high explosive.After perforating bullet is detonated, detonation reaches primer bar 503 by playing seam broken 5011 through booster explosive film 505, primer bar 503 is passed to the ring 504 that detonates with detonation then, by the ring 504 that detonates detonation reached perforating bullet main charge 506 at last, perforating bullet main charge 506 is after oral area detonates, detonation is upwards propagated along main charge 506, meanwhile cavity liner 503 begins to collapse under pressure at oral area, and move to the perforating bullet axis direction successively, because the detonation rate of explosive 506 is much larger than the axially-movable speed of cavity liner 507, when detonation reaches the top of powder charge 506 and promotes cavity liner 507 tops when travelling forward, the metal of cavity liner 507 oral areas does not also bump against on axis, has just become " small-angle " by " big cone angle ".Such structure makes cavity liner 507 in the process that forms jet, the change procedure that a cone angle is arranged, make jet bullet top cavity liner begin to collapse when collapsing, the state that perforating bullet is approximate when being in the small-angle perforating bullet and beginning perforation, thereby make big cone angle perforating bullet that the performance of similar small-angle perforating bullet be arranged, the height of perforating bullet has but shortened 30～50%.

Claims

1. petroleum perforator that has the ring-like structure of detonating, comprise shell case (501), flame proof plug (502), primer bar (503), ring (504) detonates, booster explosive film (505), main charge (506), cavity liner (507) and flame proof film (508) is characterized in that between shell case (501) and powder charge (506) primer bar (503) being housed, booster explosive film (505), ring (504) and flame proof film (508) detonate.

2. petroleum perforator according to claim 1, it is characterized in that leaving 6～16 degree of depth less than 2 millimeters at shell case (501) inner surface, width is the quick-fried groove of 05～5 millimeter lead (5012), leads quick-fried groove (5012) and is radial symmetrical distribution development from seam broken (5011) to oral area; One peripheral initiation groove (5013) is arranged near shell case (501) oral area, and peripheral initiation groove (5013) is perpendicular to the axis of perforating bullet (5), and is parallel with shell case (501) oral area and lead quick-fried groove (5012) and communicate.

3. according to the described petroleum perforator of claim 1, it is characterized in that fine grain high explosive forms the propagation of explosion medicinal strip (503) and the ring (504) that detonates the leading to add in quick-fried groove (5012) and the peripheral initiation groove (5013) high sensitivity is arranged of the inner surface of shell case (501); The booster explosive film (505) of same material system is arranged around oral area, and thickness is 0.1～1.0 millimeter.

4. petroleum perforator according to claim 1 is characterized in that the inner surface in shell case (501), and booster explosive film (505), and primer bar (503) scribbles flame proof film (508) on the ring (504) that detonates.