CN201424935Y - Petroleum perforating and fracturing bullet - Google Patents

Abstract

The utility model relates to a petroleum perforating and fracturing bullet. A horizontal inner hole of a seat body is connected with a launching tube via screw threads, a vertical hole of the seat body is connected with a temperature-resistant igniter via screw threads, a bullet body is arranged in the launching tube, a grain and a delay detonator are arranged in the bullet body, and igniting charge is arranged in the tail hole of the delay detonator. A sealing ring is arranged between the seat body and the launching tube, two bullet belts are embedded outside the bullet body, a sealing ring is arranged between the temperature-resistant igniter and the seat body, and the end part of the temperature-resistant igniter in the seat body is provided with launching explosive. The utility model has the advantages of launching in a predetermined mode and improving the permeability of hydrocarbon reservoir in a well under the condition that the operation cost is greatly reduced, the tightness and the security are good, and the bullet can be widely used for compound perforating operations of various oil and gas wells.

Description

Petroleum perforation pressure break bullet

Technical field

The utility model belongs to oil gas field composite gun perforation equipment, particularly a kind of petroleum perforation pressure break bullet.

Background technology

At present, it is investigated that the oil well of the domestic oil field of card genus low-permeability oil deposit accounts for more than 70%, and improve this type of oil-well strata permeability, the comparatively effectively way that realizes well yield is the fracturing technology technology, but this technology construction is complicated, cost is higher (60～700,000 yuan/well), and its construction total effective rate only is about 70%.Present stage, develop from domestic and international perforating technology, owing to be subjected to the influence of oil well casing size, realizing that perforation wears on the dark 1 meter basis, wear and improve stratum permeability deeply and be still waiting research by improving perforation again.Therefore, develop a kind of suitable China low-permeability oil deposit oil field characteristics, low cost and can be extremely urgent at the new technology of oil reservoir enforcement effect.When the oil gas well carried out the composite gun perforation operation, the whole blow-by of prior art was in the airtight perforator of need packing in advance during operation; Prior art adopts acupuncture firer element to detonate, and relative safety is lower; Owing to be subjected to the influence of oil well casing size, and prior art requires once to finish perforation and bullet with advancing blast action, the inner explosive charge of its internal emission medicine and bullet body is subjected to size to limit relative charge weight just less so, its emission rate and brisance will be affected so, and then the validity that OIH layer permeability improved will reduce.

Summary of the invention

The purpose of this utility model is to solve above-mentioned existing existing problem, provide a kind of when minimizing perforation tunnel inwall is because of jet perforating high temperature sintering area, make the duct inwall produce more, longer crack, improve the infiltrative petroleum perforation pressure break of oil well oil-gas Layer bullet.

The utility model is achieved in that the horizontal endoporus of pedestal is by the transmitting tube that is threaded, the vertical endoporus of pedestal is by the heatproof igniter that is threaded, the bullet body is installed in the transmitting tube, powder column and delay detonator are installed in the bullet body, in the uropore of delay detonator ignition charge is housed; Between pedestal and the transmitting tube sealing ring is installed, the external embedding two place's bearing bands of bullet are equipped with sealing ring between heatproof igniter and the pedestal, and the emission medicine is equipped with in the end of heatproof igniter in the pedestal.

Advantage of the present utility model is that transmitting tube combines formation in the interference mode with the bullet body, and the external embedding two place's bearing bands of bullet have the sealing and the function of holding one's breath, and powder column and delay detonator are housed, to finish bullet body delayed explosibility function in it; Described pedestal is the assembling main body, transmitting tube parts and described heatproof igniter all with pedestal by being threaded; Described propellant powder is connected with pedestal pre-installedly to go in the pedestal propellant powder chamber at the heatproof igniter, and its effect is to produce high temperature and high pressure gas the bullet body is launched being subjected to external drive moment.Between pedestal and transmitting tube and the heatproof igniter sealing ring is installed, thereby good airproof performance.Realized and to have launched by predetermined way, and can in finishing the oil and gas wells in oil fields perforation tunnel, implement the blast requirement, the detonation wave moment generation pressure that its blast is produced can reach 70MPa, and oily vapour rock stratum cracking pressure 40-60MPa, so can guarantee after the bullet blast that the rock stratum produces the crack; Reduce the duct inwall because of jet perforating high temperature sintering area on the one hand, made the duct inwall produce more, longer crack on the other hand, under the situation that operating cost reduces significantly, improved the permeability of OIH gas-bearing formation.Safety is good, can be widely used in various oil gas wells and carry out the composite gun perforation operation.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

The specific embodiment

Describe in detail below in conjunction with accompanying drawing: as shown in the figure, pedestal 5 horizontal endoporus are by the transmitting tube 2 that is threaded, pedestal 5 vertical endoporus are by the heatproof igniter 8 that is threaded, bullet body 1 is installed in the transmitting tube 2, powder column 4 and delay detonator 7 are installed in the bullet body 1, ignition charge 11 is housed in the uropore of delay detonator 7; Between pedestal 5 and the transmitting tube 2 sealing ring 3 is installed, bullet body 1 outer embedding two place's bearing bands 6 are equipped with sealing ring 9 between heatproof igniter 8 and the pedestal 5, and in the pedestal 5, emission medicine 10 is equipped with in the end of heatproof igniter 8.

During use, at first the present invention's (10 on every rice bran oil layer) is installed in energy-concentrated bullet compound blasting and perforating device precalculated position and is fixed by screw, heatproof igniter of the present invention is closely contacted with the compound blasting and perforating device of energy-concentrated bullet detonating fuse, finish perforation position in the cable transmission mode down to the oil well oil reservoir with the compound blasting and perforating device of energy-concentrated bullet then, again by the cable compound blasting and perforating device of the energy-concentrated bullet chopped-off head priming system that detonates, by the detonating fuse propagation of explosion, detonating fuse detonation wave moment the multistage heatproof igniter of the present invention that detonates, the heatproof igniter is detonated the flame of its output of back will light propellant powder, the high temperature and high pressure gas that propellant powder produces is launched the bullet body on the one hand, light delay detonator input point gunpowder on the other hand, ignition charge is lighted delay powder again, after delaying after a while, delay detonator output priming detonates the inner powder column of bullet body, finishes whole mechanisms then.The bullet body is injected the perforation tunnel, certain depth is blasted in the duct, the detonation wave that its blast is produced can reduce the duct inwall on the one hand because of jet perforating high temperature sintering area, makes the duct inwall produce more, longer crack on the other hand, improves the infiltrative purpose of OIH layer to reach.

Claims (1)

1, a kind of petroleum perforation pressure break bullet is characterized in that, the horizontal endoporus of pedestal is by the transmitting tube that is threaded, the vertical endoporus of pedestal is by the heatproof igniter that is threaded, the bullet body is installed in the transmitting tube, powder column and delay detonator are installed in the bullet body, in the uropore of delay detonator ignition charge is housed; Between pedestal and the transmitting tube sealing ring is installed, the external embedding two place's bearing bands of bullet are equipped with sealing ring between heatproof igniter and the pedestal, and the emission medicine is equipped with in the end of heatproof igniter in the pedestal.

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