CN2565979Y

CN2565979Y - Secondary effect-increasing perforator

Info

Publication number: CN2565979Y
Application number: CN 02251674
Authority: CN
Inventors: 郑长建; 索明武; 蔡山; 胡艳玲; 金海东; 梁岩
Original assignee: Daqing Oilfield Co Ltd
Current assignee: Daqing Oilfield Co Ltd
Priority date: 2002-08-14
Filing date: 2002-08-14
Publication date: 2003-08-13
Anticipated expiration: 2012-08-14

Abstract

The utility model belongs to a secondary effect-increasing perforator which utilizes high pressure generated by the secondary combustion of gun powder to carry out two times of gas fracturing to strata after an oil and gas well is perforated. The utility model comprises a one-piece effect-increasing perforator and a splitting type gun powder pressure generator, wherein, a core barrel (11) is arranged in the splitting type gun powder pressure generator; a detonator (3) which is connected by a primacord (6) is arranged in the one-piece effect-increasing perforator. The one-piece effect-increasing perforator and the splitting type gun powder pressure generator are in screwed connection by a detonation transmission short stub (10) in which a central hole (14) which is penetrated through by the primacord (6) is arranged, and the primacord (6) extends into the core barrel (11); a connecting position of the short stub (10), the one-piece effect-increasing perforator and a housing of the splitting type gun powder pressure generator is provided with a sealing ring. The proposal assembles the one-piece effect-increasing perforator and the splitting type gun powder pressure generator into integration, and the utility model has the advantages of high pressure rising speed of the gun powder for strata, high peak pressure and long acting time. The strata generate long multiple cracks, the seepage flow capability of zones near the well is enhanced, and the output of an oil well is enhanced.

Description

Secondary synergy perforator

(1) technical field:

After the utility model belonged to perforating oil gas well, the high pressure that utilizes the gunpowder second-time burning to produce carried out the secondary synergy perforator of twice gas fracturing to the stratum.

(2) background technology:

At present, the gunpowder pressure-generating device that adopt in the oil field can be divided into two kinds of integral type synergy perforator and split type gunpowder pressure generators.Integral type is that stick and perforating bullet all are assembled in the perforating gun, forms the synergy perforator.This kind mode gunpowder combustion speed is fast, the surge pressure height.But be subjected to spatial constraints in the bore, explosive payload is less, and the difficult adjusting of powder volume, and body of a gun material is had relatively high expectations.Split type is that perforating gun and high enegry gas fracturing gunpowder are combined as two parts up and down, and its structure is: top is perforating gun, and the centre is an energy converter, and the bottom is a relief tube, and stick is housed in it.This kind technology can make high enegry gas fracturing gunpowder and various perforating gun make up arbitrarily, and the Pressure breaking bullet dose is adjustable, can be according to different formation conditions, construction requirement and the choose reasonable dose, and gunpowder pressure long action time, but it is relatively slow to play pressure speed.

(3) utility model content:

Technical problem to be solved in the utility model is at the problem of depositing in the background technology, and provides a kind of dose the adjustable secondary synergy perforator that has improved pressure speed.

The invention for solving the technical problem can reach by following technical solution: between integral type synergy perforator and split type gunpowder pressure generator, is threaded with the propagation of explosion short circuit, and the centre bore that has detonating fuse to pass in the short circuit, wherein detonating fuse stretches into core barrel.

In such scheme, sealing ring should be adorned in the junction of the shell of short circuit and integral type synergy perforator and split type gunpowder transmitting apparatus.Secondary synergy perforator is that integral type and split type synergy perforator are combined, and top is integral type synergy perforator, and the bottom is split type gunpowder pressure generator; During construction, with under the secondary synergy perforator behind the precalculated position, when igniting perforating bullet, gunpowder in the integral type synergy perforator on top at first takes fire, reach surge pressure rapidly, the stratum is carried out loading fast the first time, around pit shaft, form netted microcrack, finish synergistic effect for the first time.Also do not have under the closed situation in the crack, the split type gunpowder in bottom burns thereupon, because the bottom powder volume is bigger, a large amount of pressure break gases carry out loading the second time to map cracking, the length in the crack of synergy formation is extended, prolonged the action time of gunpowder, finished the secondary synergistic effect the stratum.

The utility model is compared with background technology has following beneficial effect: gunpowder is fast to a pressure speed on stratum, surge pressure height and long action time.Make the stratum produce long and many crack, improved the percolation ability of near wellbore zone, improve oil well output.

(4) description of drawings:

Accompanying drawing 1 is this perforator installation drawing;

Accompanying drawing 2 is complete section structure charts of propagation of explosion short circuit 10 on Fig. 1.

(5) specific embodiment:

Below in conjunction with the drawings and specific embodiments will the utility model is described in further detail:

By Fig. 1 in conjunction with shown in Figure 2, contain integral type synergy perforator and split type gunpowder pressure generator, contain core barrel 11 in wherein split type, contain the detonator 3 that useful detonating fuse 6 connects in the integral type, between integral type synergy perforator and split type gunpowder pressure generator, be threaded with propagation of explosion

short circuit

10,10 li centre bores 14 that have detonating fuse 6 to pass of short circuit, wherein detonating fuse 6 stretches into core barrel 11.

In such scheme, short circuit 10 should be adorned sealing ring with the junction of the shell of integral type synergy perforator and split type gunpowder transmitting apparatus.The utility model comprises that cable head 1 is connected with cable, magnetic localizer 2 is connected with sliding sleeve 3 with rifle head 4, fill gunpowder 8 between two perforating bullets (7,9) and be put on the fastening devices, detonating fuse 6 connects detonator 5 shape connection perforating bullet (7 in the shape of a spiral, 9) with gunpowder 8, pass propagation of explosion short circuit 10, stretch in the core barrel 11, propellant 13 is wrapped in core barrel 11 outsides, the gunpowder outside is inserted in screen casing 12 and is connected with propagation of explosion short circuit 10, connects gun breech in the screen casing bottom.

Claims

1, a kind of secondary synergy perforator that relates to oilfield, contain integral type synergy perforator and split type gunpowder pressure generator, contain core barrel (11) in wherein split type, contain the detonator (3) that useful detonating fuse (6) connects in the integral type, it is characterized in that: between integral type synergy perforator and split type gunpowder pressure generator, be threaded with propagation of explosion short circuit (10), the centre bore (14) that short circuit (10) lining has detonating fuse (6) to pass, wherein detonating fuse (6) stretches into core barrel (11).

2, perforator according to claim 1 is characterized in that: short circuit (10) should be adorned sealing ring with the junction of the shell of integral type synergy perforator and split type gunpowder generator.