RU2465447C1 - Lining powder pressure generator - Google Patents

Abstract

FIELD: oil and gas production.

SUBSTANCE: proposed pressure generator is intended for encased shaped-charge perforators, implosion devices and powder generator devices arranged on cable and made up of integral tubular lining charge to be secured on device case of cable surface. Said charge is composed of fragments secured on device case or cable surface, arranged one after another. Note here that said fragments are made from rod elements of ballistic artillery powder shaped to uniform tubular structures by gluing outer side surfaces of powder elements by nitrocellulose size.

EFFECT: higher completeness of powder charge combustion and efficiency.

Description

The invention relates to the oil and gas industry, namely, powder pressure generators designed to intensify oil and gas production.

The purpose of the invention is to increase the efficiency of the facing powder pressure generators used in conjunction with cumulative perforators, implosive or other devices.

Many devices are known for intensifying oil and gas production of wells. A description of their designs and principles of impact on the bottomhole zone of wells is reflected in a number of foreign and domestic patents, for example:

SU 933959 A, 06/07/1982; SU 5355802 A, 10/18/1994;

SU 5775426 A, 07/07/1998; RU 2151282 C1, 06/20/2000;

(56) RU 2175059 C2, 01.20.2001; RU 2170339 C2, 07/10/2001;

RU 26325 U1, 11.27.2002; RU 2242590 C1, December 20, 2004;

RU 2277167 C1, 05.27.2006; RU 2280150 C2, 07.20.2006;

RU 2307921 C2, 10/10/2007; RU 2312982 C2, 12.20.2007;

RU 2315178 C1, 02.20.2008; RU 2345977 C1, 02/10/2009.

RU 2413069 C2, 02.27.2011.

Closest to the proposed solution for its intended purpose, technical appearance and functioning is a facing pressure powder generator, the design of which is reflected in patent RU 2413069 C2, 02.27.2011 (prototype).

The powder pressure generator according to this invention is a single tubular facing charge, made in the form of a set of fragments, fixed on the housing of cumulative perforators and implosive devices, one after the other, while the fragments are made of bar elements of ballistic artillery powder in the form of uniform structures in the form of a pipe by bonding the ends of the powder elements with cold curing polymer or in the form of flexible plates by tying the powder elements with nitrocellulose sludge cotton ribbon.

As the results of studies and tests have shown, the disadvantages of the powder facing pressure generator according to the patent RU 2413069 C2, 02.27.2011 are its low efficiency and the presence of unburned residues of the cold curing polymer and cotton tape during the combustion of the powder charge, clogging the well and, as a result, reducing its collector properties. The low efficiency of the powder pressure generator according to this invention is explained by the fact that under the influence of the cumulative jet only a small part of the powder elements ignites and burns, namely those located opposite the cumulative charges. The rest of the powder elements do not ignite and do not burn, since the ignition pulse from the burning powder elements is quenched by the water medium of the well and is not transmitted to the other elements of the powder. The binding of the powder elements with nitrocellulose film or cotton tape, as provided by the prototype, also does not eliminate this drawback, since it does not exclude the ingress of well fluid (water) between the side surfaces of the powder elements.

In order to increase the completeness of combustion of the powder charge, a powder facing pressure generator is proposed, devoid of these disadvantages. The proposed powder pressure generator facing (figa, b, figure 2) is a single powder charge, made in the form of a pipe, assembled from rod tubular elements of ballistic artillery powder 1, which are fastened together by external forming (side) surfaces by gluing nitrocellulose glue 2. The powder pressure generator is fixed on the housing of a cumulative punch, implosive devices one after another. The proposed solution can also be used in the form of a powder facing pressure generator (Fig. 3), lowered into the well on a geodesic cable 4 and ignited using a detonating cord 3 operating in the combustion mode.

The proposed powder pressure generator facing can be made in the form of a multilayer powder charge.

The advantage of the proposed powder pressure generator in comparison with the prototype is its high completeness of combustion of the powder elements. The use of nitrocellulose glue eliminates the possibility of penetration of well fluid (water) between the powder elements of ballistic artillery powder. The operation of the powder facing pressure generator is that under the influence of a cumulative jet or an ignition pulse, the powder elements located opposite the cumulative or igniter devices are first ignited and burned. Then nitrocellulose glue burns, igniting other powder charge elements.

Claims (1)

Facing gunpowder pressure generator for housing cumulative perforators, implosive devices and gunpowder generator devices located on the cable, made in the form of a single tubular facing charge mounted on the device body or on the cable surface, made in the form of a set of fragments fixed on the device body or on the cable surface one after the other, the fragments are made from the core elements of ballistic artillery powder in the form of homogeneous structures in ph IU tube, characterized in that a common tubular cladding propellant charge is formed by bonding the outer side surfaces of the powder elements nitrocellulose adhesive.

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