CN202165062U - Lined-cavity charge with consistent punching aperture rule and hole depth - Google Patents

Abstract

The utility model discloses a lined-cavity charge with a consistent punching aperture rule and a consistent hole depth. The lined-cavity charge mainly comprises a charge body and a reflection groove is arranged on the inner wall of the inner cavity of the charge body. The inner cavity of a lined-cavity charge shell adopts a structure of the combination of a reflection groove and arc-top type stepped reducing and the reflection groove is arranged on the stepped reducing part. The utilization rate of main explosive load is increased, so that detonation waves act in the axial direction through a reflection interface during transferring and are enhanced. The initial energy and the speed of the detonation waves are improved and the punching indexes of the lined-cavity charge are also improved. Due to the adoption of the lined-cavity charge, the influence of harmful detonation waves is effectively reduced and the detonation power and the jet speed are improved. Meanwhile, the effect of the consistent punching aperture rule and the consistent hole depth are guaranteed and better punching indexes are realized. The lined-cavity charge with a consistent punching aperture rule and a consistent hole depth also has the advantages of simple structure, reasonable design and easy implementation.

Description

The lined-cavity charge that a kind of piercing aperture rule and hole depth are consistent

Technical field

The utility model relates to perforating bullet, the lined-cavity charge that specifically a kind of piercing aperture rule and hole depth are consistent.

Background technology

At present, after setting of casing was adopted in the oil field more, the use jet perforator was penetrated sleeve pipe, cement sheath, the contaminated zone of wearing down-hole sealing layer of oil gas production and is goed deep into oil-gas Layer and carry out completion, reaches the purpose of oil recovery, gas production, water filling.What the perforator perforation played a major role is lined-cavity charge; Its jet is worn dark index and is had the most direct, most important contribution for linking up layer of oil gas production, therefore carries out raising lined-cavity charge punching quality and stability study and has profound significance to improving oil well productivity.With lined-cavity charge in laboratory target practice process of the test; The discovery piercing aperture is irregular, and problems such as hole depth uniformity difference, main cause are the effects of harmful shock wave in the detonation process; Cause jet in perforation procedure, to receive influence; It is bad centrality to occur, and the phenomenon that energy weakens has reduced the penetration effect of jet.Perforating depth in the reservoir is inconsistent, is prone to cause turbulent phenomenon occurs near the eyelet, has influenced flowing of fluid, thereby has influenced production capacity.

Application number is 200920243436.8, and the applying date is on November 24th, 2009, and publication number is 201531259U; Open day is the perforating bullet of a kind of oil gas well of 2010-07-21 with the close deep penetration perforator in high hole; Comprise shell case and cavity liner, the perforation end of shell case is formed by cylindrical section, conicle section and big conical section, and the diameter of cylindrical section is 9mm-12mm; The tapering of conicle section is 125 °-140 °, and the tapering of big conical section is 45 °-55 °; The shell case inner chamber is formed by propagation of explosion hole, conelet body cavity, big cone cavity and cylindrical cavity, and the tapering of conelet body cavity is 90 °-110 °, and the tapering of big cone cavity is 42 °-50 °, and the cylindrical cavity diameter is 46mm-50mm.The utility model penetration depth is darker, and piercing aperture is bigger, and the hole of perforation is close higher, and can avoid disturbing between bullet.This shows that it is darker that disclosure document has only solved penetration depth, the problem that the aperture is big, it is irregular not solve piercing aperture, problems such as hole depth uniformity difference.

Application number is 201020037543.8, and the applying date is 2010-01-05, and publication number is 201560753U; Open day is a kind of big diameter and deep penetrating perforating bumb of 2010-08-25, relates to the design and manufacturing technology field of perforating bullet, comprises shell case and cavity liner; Shell case is made up of metal shell, and the internal face of metal shell is made up of four sections curvilinear structures, and the tip of cavity liner is an arc-shaped structure; Internal face is the taper seat structure, and it is a kind of existing than the large perforation aperture that the utility model provides, again the big diameter and deep penetrating perforating bumb of the good penetration depth of tool; Solved deep penetrating charge and large aperture perforating bullet and can not form large aperture and the deep penetrating problem on stratum on the sleeve pipe simultaneously, the cavity liner design of employing; Can strengthen explosive payload, therefore have the characteristics that improve perforating bullet efficient.Equally, it is darker that disclosure document has only solved penetration depth, the problem that the aperture is big, and it is irregular not solve piercing aperture, problems such as hole depth uniformity difference.

Application number is 200820178896.2; The applying date is 2008-11-18; Publication number is 201297161, and open day is large aperture, the deep penetrating charge of 2009-08-26, comprises silk pressing, body, powder column; Be characterized in that cavity liner is pushed up by circular-arc cover, with the coniform cover body composition different with the interconnective successively 3 sections coning angles in cover top.In order to improve the stability of perforating depth and perforating depth simultaneously, also can be provided with back-up ring in the bottom of cavity liner, between back-up ring and body, gland is housed.The utility model makes the bus of cavity liner become broken line, under the constant situation of cavity liner height and opening, has improved bus greatly, improves perforating depth and perforation diameter.This cavity liner is easy to process, can be in mould a mould pressing, simplified production technology, reduced manufacturing cost.The back-up ring and the gland that are provided with can make between cavity liner, powder column and the body to be locked, and the three does not produce relative displacement when detonating, and guarantee the stability of perforating depth and perforating depth.Have simple in structure, reasonable in design, easy to process, cost is low, advantage such as easy to utilize.This open source literature is to design in order better to improve the stability of perforating depth and perforating depth equally, and it is irregular not solve piercing aperture equally, problems such as hole depth uniformity difference.

The utility model content

The purpose of the utility model is the defective that exists to prior art; Provide a kind of piercing aperture rule and hole depth consistent lined-cavity charge, theoretical according to the Mach detonation wave, in order to reduce harmful detonation wave to wearing dark influence; Perforation shell case inner chamber is designed to the structure that reflection groove combines with arc top formula and ladder reducing; Increase the reflection groove structure at ladder reducing place, increase main charge amount utilization rate, make to act on axis direction through reflecting interface in the detonation wave transmittance process and strengthened; Improve detonation wave primary power and speed, promote the perforation index of perforating bullet.The piercing aperture that solves the prior art existence is irregular, problems such as hole depth uniformity difference.

The utility model solves the technical scheme that its technical problem adopted: the lined-cavity charge that a kind of piercing aperture rule and hole depth are consistent, and its structure mainly comprises body; Offer reflection groove on the inwall of said body inner chamber.

Said reflection groove is opened on the arc surface of arc top, middle part staged reducing of body inner chamber, and 1/4～1/3 place below the oral area.

Arc top formula structure is adopted on said body inner chamber top, and the reducing mode that the below then adopts staged to be increased successively to the bottom by the top behind two sublinear reducings, becomes fixed inner diameter in the bottom.

Said reflection groove cross section is an arcs of recesses, and reflection groove spacing between any two equates.

The lined-cavity charge that a kind of piercing aperture rule of the utility model and hole depth are consistent is compared with prior art, has following beneficial effect:

The utility model is designed to the structure that reflection groove combines with arc top formula and ladder reducing with perforation shell case inner chamber; Increase the reflection groove structure at ladder reducing place; Increase main charge amount utilization rate; Make to act on axis direction through reflecting interface in the detonation wave transmittance process and strengthened, improve detonation wave primary power and speed, promote the perforation index of perforating bullet.The utility model effectively reduces harmful detonation wave influence, has improved detonation power and effluxvelocity, arrives better perforation index.It is simple in structure, reasonable in design, is easy to realize.

Description of drawings

Fig. 1 is the structural representation of the consistent lined-cavity charge of a kind of piercing aperture rule and the hole depth of the utility model;

Fig. 2 is the partial enlarged drawing of Fig. 1.

Among the figure: body 1; Arc top formula structure 2; Staged reducing 3; Reflection groove structure 4.

The specific embodiment

Next explanation at length below with reference to Figure of description a kind of piercing aperture rule of the utility model and the consistent lined-cavity charge of hole depth being done.

Lined-cavity charge as shown in the figure, that a kind of piercing aperture rule and hole depth are consistent, its structure mainly comprises body 1; Arc top formula structure 2 is adopted on said body inner chamber top, has improved the explosive payload of perforating bullet and the effective rate of utilization of explosive; Then adopt by the top to staged reducing 3 modes that the bottom increases successively the below, behind two sublinear reducings, becomes fixed inner diameter in the bottom, has eliminated the influence of harmful shock wave to jet.Offer reflection groove structure 4 on the inwall of said body inner chamber.Said reflection groove is opened on the arc surface of arc top, middle part staged reducing of body inner chamber, and 1/4～1/3 place below the oral area.A few are set and have the certain angle arcs of recesses, and reflection groove spacing between any two equates.Reflection groove structure 4 has increased explosive charge, makes to act on axis direction through reflecting interface in the detonation wave transmittance process and strengthened, and improves effluxvelocity, increases the penetration depth of perforating bullet, has guaranteed the effect that piercing aperture rule and hole depth are consistent.

The above embodiment is a kind of of the more preferably concrete embodiment of the utility model, and common variation that those skilled in the art carries out in the utility model technical scheme scope and replacement all should be included in the protection domain of the utility model.

Claims (4)

1. the consistent lined-cavity charge of piercing aperture rule and hole depth, its structure mainly comprises body; It is characterized in that: offer reflection groove on the inwall of said body inner chamber.

2. the lined-cavity charge that a kind of piercing aperture rule according to claim 1 and hole depth are consistent is characterized in that: said reflection groove is opened on the arc surface of arc top, middle part staged reducing of body inner chamber, and 1/4～1/3 place below the oral area.

3. the lined-cavity charge that a kind of piercing aperture rule according to claim 1 and 2 and hole depth are consistent; It is characterized in that: arc top formula structure is adopted on said body inner chamber top; The reducing mode that the below then adopts staged to be increased successively to the bottom by the top; Behind two sublinear reducings, become fixed inner diameter in the bottom.

4. the lined-cavity charge that a kind of piercing aperture rule according to claim 1 and 2 and hole depth are consistent, it is characterized in that: said reflection groove cross section is an arcs of recesses, and reflection groove spacing between any two equates.

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