CN2698971Y

CN2698971Y - Perforation sand-proof device

Info

Publication number: CN2698971Y
Application number: CN 200420059808
Authority: CN
Inventors: 杨胜来; 蒋利平
Original assignee: China University of Petroleum Beijing
Current assignee: China University of Petroleum Beijing
Priority date: 2004-05-21
Filing date: 2004-05-21
Publication date: 2005-05-11
Anticipated expiration: 2014-05-21

Abstract

The utility model discloses perforation sand-proof device, comprising a cylindrical outer shell with an open end and a closed end. The outer side of the center of the closed end of the outer shell is provided with a fire point, and gun powder cover is arranged in containing space around the outer shell. Main explosive is arranged in the containing space formed by the gun powder cover and the closed end of the outer shell, and the position of the fire point at the outer side of the outer shell is provided with a through hole and initiating explosive connected with the main explosive in the outer shell. The open end of the outer shell is circularly provide with a flexing plate along the inner wall of the outer shell, the containing space formed by the inner wall of the outer shell and the open end is a sand-proof material chamber, fillers are arranged in the sand-proof material chamber, gun powder propelling chamber is arranged behind the sand-proof material chamber, and a blasting fuse is arranged between the main explosive and the gun powder propelling chamber. The utility model can prevent strata from sand flowing due to positive holes and collapse, since good flow path can be formed among metallic granules or ceramic granules or quartz sand granules, strata can be prevented from generating sand, the production of petroleum or natural gas can not be affected, effective working time is prolonged, and the expenses of other measures are reduced.

Description

A kind of perforation sand control installation

Technical field

The utility model relates to a kind of perforation sand control installation, especially a kind of oil and gas exploitation process that is used for, and the in-advance sand-preventing device of oil well, well or gas well belongs to the petrochemical technology field.

Background technology

In the oil and gas exploitation process, the initial sand control of oil well, well or gas well is extremely important, and initial sand control also can be called initiatively sand control, is meant the stratum to shaking out, and just initiatively takes a kind of sand control way of sand control measure when it does not also shake out.

The method of oil reservoir sand control is a lot of at present, mainly comprises: mechanical sand control and chemical sand control two big classes.Mechanical sand control has methods such as gravel filling sand prevention, screen sand control.The most frequently used method is a kind of steel wire lump perforation sand control technique, and this anti-sand method is to inject the steel wire pelletizing in perforation in shell hole, and the steel wire pelletizing has certain porosity, can prevent to shake out in the duct.

There is following point in existing steel wire lump perforation sand control:

1, inject before, the steel wire lump volume is big, injects in the process owing to eyelet misaligns, burr pull, launch reasons such as scattering, the probability that enters the duct is low, can not all enter the duct, promptly pack effectiveness is low.

Even 2 enter the duct, the distribution in the duct is also inhomogeneous, starts a leak, and promptly sand control efficient is low.

3, because steel wire is thin, inject part steel wire fragmentation in the process, cause permeability decrease, influence produce oil or aerogenesis.

4, after the long-term work, steel wire group may be gone out by oily stream, and is still as a whole after going out, and is the pelletizing of mao mao Si Si, causes holddown easily, damages underground equipment, influences ordinary production.

In order to guarantee normal production in the recovery process of petroleum gas, the problems that exist in the perforation sand control need to be resolved hurrily.

The utility model content

Technical problem to be solved in the utility model is at the deficiencies in the prior art, a kind of perforation sand control installation is provided, adopt the graininess filler, spheric granules was easy to enter in the perforation tunnel under under high pressure gas promoted, form and fill anti-layer of sand even, good penetrability, cementation and formation in the hole has improved charging efficiency and sand controlling result.

Technical problem to be solved in the utility model is achieved by the following technical solution:

A kind of perforation sand control installation, it includes the cylinder blanket that an end seals an end opening, be provided with fire point in the closed termination of outer cover central authorities outside, be provided with the medicine cover in the accommodation space that this shell enclosed, accommodation space in the shell is divided into two parts, medicine cover and closed termination of outer cover enclose in that part of accommodation space that forms and are provided with main explosive, the position of shell arranged outside fire point offers through hole and is provided with primer and links to each other with the main explosive of enclosure, on the shell open end, establish bending plate along its inwall ring, one end of this bending plate is fixed on the open port place of shell, bending end inserts into the inner the chamber and is fixed on the outer casing inner wall along outer casing inner wall, the accommodation space that this bending plate and outer casing inner wall enclosed is the sand prevention material chamber, and its cross sectional shape is a triangle, the indoor charges that are provided with of this sand prevention material, be provided with the propelling coyote hole at the rear portion of sand prevention material chamber, advancing coyote hole and sand prevention material chamber is what be wholely set, and the indoor promoting drug that is provided with of promoting drug is provided with detonating fuse between main explosive and the promoting drug.

The formed angle of bending end and outer casing inner wall is 30 °-45 °.

Charges are particle, and the degree of porosity of this particle adhesive bond is 25%-30%, permeability 1-9 μ m ²Particle is a spheric granules, and particle diameter is from 20 orders-80 order.

Above-mentioned particle can adopt the glued metallic particles in back that can at high temperature locally dissolve, lower the temperature; Also can be haydite or sand grains, its outside applies in advance can dissolve, cool off the glued resin bonded agent layer in back when high temperature.

In sum, the utlity model has following advantage:

1, adopts spheric granules, improved integral body and injected efficient;

2, particle is piled up in the duct evenly, the cavity can not occur, and charging efficiency improves;

3, in case inefficacy will be broken for particle, can not form bulk integral body, not cause the destruction of pump.

Description of drawings

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

Fig. 2 is the schematic diagram of the utility model in sleeve pipe;

Fig. 3 is the structural representation of the anti-layer of sand of employing the utility model perforation sand control installation formation.

The specific embodiment

Below in conjunction with accompanying drawing the technical solution of the utility model is described further.

As shown in Figure 1, be structural representation of the present utility model.As can be known from Fig. 1, the utility model is a kind of perforation sand control installation, it includes the cylinder blanket 1 that an end seals an end opening, be provided with fire point 12 in the shell 1 blind end 11 central authorities outsides, be provided with medicine cover 13 in the accommodation space that this shell 1 is enclosed, accommodation space in the shell 1 is divided into two parts, the blind end 11 of medicine cover 13 and shell 1 encloses and is provided with main explosive 14 in that part of accommodation space that forms, and the position of shell 1 arranged outside fire point 12 offers through hole 15 and is provided with primer 16 and links to each other with the main explosive 14 of shell 1 inside.On shell 1 open end 17, establish bending plate 2 along its inwall ring, one end 21 of this bending plate 2 is fixed on 17 mouthfuls of places, open end of shell 1, bending end 22 inserts into the inner the chamber and is fixed on shell 1 inwall along shell 1 inwall, this bending plate 22 is sand prevention material chamber 23 with the accommodation space that shell 1 inwall is enclosed, its cross sectional shape is a triangle, be provided with charges 231 in this sand prevention material chamber 23, be provided with propelling coyote hole 24 at the rear portion of sand prevention material chamber 23, advancing coyote hole 24 and sand prevention material chamber 23 is what be wholely set, advance in the coyote hole 24 and be provided with promoting drug 241, between main explosive 14 and the promoting drug 241 detonating fuse 3 is set.

The formed angle α of bending end and outer casing inner wall is 30 °-45 °.

Charges 231 are particle, and the degree of porosity of this particle adhesive bond is 25%-30%, permeability 1-9 μ m ²

In order to make particle glued anti-layer of sand that becomes to have certain intensity, certain permeability is arranged in the duct, this particle is a spheric granules, and particle diameter is from 20 orders-80 order.Can adopt metallic particles, glued after at high temperature dissolve, lower the temperature in the part; Can also adopt haydite or sand grains, coated with resins is as the consolidating agent layer in advance in its outside, and this resin can dissolve, cool off the back when high temperature glued.

As shown in Figure 2, be the schematic diagram of the utility model in sleeve pipe.As can be known from Fig. 2, this device under the carrying of perforating gun 4, is inserted in the down-hole casing 300, in conjunction with the structure shown in Fig. 1, its perforation sand control process is as follows:

At first, primer is ignited at 12 places at flashpoint, and then main explosive 14 is lighted, and the shock wave hot-fluid that main explosive 14 produces breaks through sleeve pipe 300 and form shell hole 400 in cement sheath 200 and oil reservoir 100.

Secondly, postpone 1,2 millisecond when main explosive 14 is lighted ejaculation, detonating fuse 3 promoting drug 241 that ignites after igniting is released filler 231, reflection at the bottom of the semicircle of shell 1, and gas flow reversing, then filler 241 is pushed in the shell hole 400.

Be heated in filler 241 enters the process of shell hole 400 and the surface is dissolved, gather the back cooling, coagulation forming forms pore media, and its structure plays the sand control effect in the stratum as shown in Figure 3.

Filler 241 can adopt metallic particles; such as: the steel ball of surface band terne metal coating; the diameter of steel ball is very little; be about 0.5mm; it also can be copper powder; particle diameter 0.5mm; perhaps adopt the haydite of resin-coated; quartzy sand grains; be positioned over the rear end of perforation cartridge bag, after perforation is finished, ignite propellant immediately; form the high energy air-flow; particle is injected in the duct, and under the effect of high temperature and heat, be consolidated into an integral body, closely contact with reservoir sand; prevent to form in the stratum hole and cave in and shake out; because the space between metallic particles or haydite or the quartzy sand grains forms good flow channel, produce sand so can either prevent the stratum, can not influence the production of oil or natural gas again.Because oil well or gas well do not shake out, so improved the effective time, have reduced the expense of other measure.

As shown in Figure 1, bending plate 22 forms one 30 °-45 ° angle α with shell 1, because the existence of this inclination alpha in the perforation process, helps main explosive cumulative, makes high energy gas form a branch of ultrahigh speed jet.The inclination angle can not be too little, in the filling stage, helps many dress sand prevention materials, and be beneficial to the output of material and insert, rebound.Simultaneously, also be easy to jet elongated and the raising of jet head speed.

This perforation sand control installation has utilized the direct acting Mohaupt effect of explosive charge, and the energy of blast is put together in certain direction, thereby greatly strengthens the local failure of blast, forms the sand control eyelet in the stratum.It is dark that perforation sand control installation provided by the utility model forms eyelet, and sand prevention material distribution of particles and accumulation are even and loading is big, and sand controlling result is good.

Need to prove at last: above embodiment is only unrestricted in order to the explanation the technical solution of the utility model, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from the spirit and scope of technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.

Claims

1, a kind of perforation sand control installation, it includes the cylinder blanket that an end seals an end opening, be provided with fire point in the closed termination of outer cover central authorities outside, be provided with the medicine cover in the accommodation space that this shell enclosed, accommodation space in the shell is divided into two parts, medicine cover and closed termination of outer cover enclose in that part of accommodation space that forms and are provided with main explosive, the position of shell arranged outside fire point offers through hole and is provided with primer and links to each other with the main explosive of enclosure, it is characterized in that: on the shell open end, establish bending plate along its inwall ring, one end of this bending plate is fixed on the open port place of shell, bending end inserts into the inner the chamber and is fixed on the outer casing inner wall along outer casing inner wall, the accommodation space that this bending plate and outer casing inner wall enclosed is the sand prevention material chamber, its cross sectional shape is a triangle, the indoor charges that are provided with of this sand prevention material, be provided with the propelling coyote hole at the rear portion of sand prevention material chamber, advance coyote hole and sand prevention material chamber to be wholely set, the indoor promoting drug that is provided with of promoting drug is provided with detonating fuse between main explosive and the promoting drug.

2, perforation sand control installation according to claim 1 is characterized in that: the formed angle of described bending end and outer casing inner wall is 30 °-45 °.

3, perforation sand control installation according to claim 1 is characterized in that: described charges are particle, and the degree of porosity of this particle adhesive bond is 25%-30%, permeability 1-9 μ m2.

4, perforation sand control installation according to claim 3 is characterized in that: described particle is a spheric granules, and particle diameter is from 20 orders-80 order.

5, according to claim 3 or 4 described perforation sand control installations, it is characterized in that: described particle is for can at high temperature locally dissolving, lower the temperature the glued metallic particles in back.

6, according to claim 3 or 4 described perforation sand control installations, it is characterized in that: described particle is haydite or sand grains, and its outside applies in advance can dissolve, cool off the glued resin bonded agent layer in back when high temperature.