RU2018508C1 - Solid fuel submersible gas generator - Google Patents

Solid fuel submersible gas generator Download PDF

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Publication number
RU2018508C1
RU2018508C1 SU4800099A RU2018508C1 RU 2018508 C1 RU2018508 C1 RU 2018508C1 SU 4800099 A SU4800099 A SU 4800099A RU 2018508 C1 RU2018508 C1 RU 2018508C1
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RU
Russia
Prior art keywords
solid fuel
charges
gas generator
cord
detonation
Prior art date
Application number
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Russian (ru)
Inventor
В.Д. Крощенко
С.М. Колясов
В.И. Павлов
В.П. Челышев
Original Assignee
Крощенко Владимир Демьянович
Колясов Сергей Михайлович
Павлов Владимир Иванович
Челышев Владимир Петрович
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Application filed by Крощенко Владимир Демьянович, Колясов Сергей Михайлович, Павлов Владимир Иванович, Челышев Владимир Петрович filed Critical Крощенко Владимир Демьянович
Priority to SU4800099 priority Critical patent/RU2018508C1/en
Application granted granted Critical
Publication of RU2018508C1 publication Critical patent/RU2018508C1/en

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Abstract

FIELD: mining industry. SUBSTANCE: sealed cartridge exploded by blasting machine detonates the detonating cord enclosed into the central tube of each mixed solid fuel charge. The products of detonation of the cord set off several dozens of linearly-spaced charges of mixed solid fuel. EFFECT: improved functional and operating characteristics. 1 dwg

Description

 The invention relates to the mining industry, specifically to devices for fracturing in wells to increase the permeability of rocks in the well zone and to intensify mining.
 Known pyrotechnic igniter device generators PGD. BK-100 and PGD.BK-150, including a sealed explosive cartridge, mixed fuel charges with central tubular lined openings in which a holding cable and charge igniters are placed.
 The disadvantage is the impossibility of "instantaneous" ignition of long charges or the assembly of individual charges with a small linear mass (1.2-2.5 kg / m).
 The purpose of the invention is to increase the efficiency by increasing the rate of ignition of charges from a mixed fuel.
 This goal is achieved by using detonating cords as a means for igniting detonation products in the boreholes of charges from mixed explosives.
 A limitation on the use of a detonating cord for this purpose is the sensitivity of the explosive to detonation. A sufficiently large number of mixed solid fuels based on ammonium or potassium perchlorate, which do not detonate in charges with a body diameter of 100 mm even under the action of a powerful detonation pulse and are widely used in wells for treating formations with powder generators of pressure type PGD or ADS, do not fall under this limitation.
Experimental studies of the effects on solid fuels of the TN-18/5 K and TPM brands of detonation products of cords of the SHEL 170/150, DUZ IV 170/1000 and DShTV 150/800 types were carried out in high-pressure vessels. It was found that both after the direct effect of the detonation products of the cord on composite solid fuel (CTT) and after exposure through a thin metal barrier (aluminum, steel, copper 1 mm thick) in a charge placed in a liquid at pressures above P cr , the process develops steadily explosive transformation with speeds corresponding to stationary combustion speeds. Values of P cr lie in the range 0.1 MPa <P cr <5 MPa at normal temperature (10 ° C) for charges without a metal cladding: P cr ≈ 35 MPa for charges with metal clad conduit, wherein the detonating cord has been placed.
The values of P cr also depend on the ambient temperature, decreasing significantly with its increase. Thus, for the charge with a metal lined channels at 50 C. P cr ≈ 13 MPa at 100 ° F cr ≈10 MPa.
The studies have confirmed the possibility of use in wells, where the hydrostatic pressure of the wellbore fluid in the blasting interval significantly exceeds the values of R cr , detonating cords of various designs for igniting charges from mixed explosives.
 The drawing shows an embodiment of the use of a detonating cord placed in the central channel of the charges of the device for local pressure increase in the well, as a means of ignition.
 The device contains a sealed explosive cartridge 1, a segment of a thermobar-resistant detonating cord 2 and charges 3 of mixed fuel. The fuel of each charge is isolated from the liquid through the central channel with a thin-walled metal tube 4 and along the side surface with armor plating 5.
The device operates as follows. At hydrostatic pressures in the well exceeding P cr , the cartridge 1 is blown up from the blasting machine, causing detonation of the DS 2. The detonation products of the DS ignite each of the charges of solid fuel in contact with the channel wall with a piece of cord.
Since the detonation velocities of LHs correspond to values of the order of 6 ˙ 10 3 -7 ˙ 10 3 m / s, the cord segment with a length of 10-20 m detonates in a time of 1.5 ˙ 10 -3 -3 ˙ 10 -3 s. The indicated time practically corresponds to the ignition delay time when the charges are exposed to a powerful heat flux, and the purpose of the invention (“instantaneous” ignition of several tens of linearly arranged charges) is achieved.
 The use of detonating cords will contribute to the widespread introduction of highly effective methods for complex treatment of the borehole zone of productive formations, which include the use of pressure generators to break the formation, which are lowered into the well through the tubing string.

Claims (1)

  1.  A SOLID FUEL WELL GAS GENERATOR, including in the upper part a sealed cartridge with an initiator and in the lower part charges from a mixed fuel with a central tube, characterized in that, in order to increase the efficiency of the action by increasing the rate of ignition of the charges from the mixed fuel, a detonating cord is placed in the tube, connected to a sealed cartridge.
SU4800099 1990-01-02 1990-01-02 Solid fuel submersible gas generator RU2018508C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU4800099 RU2018508C1 (en) 1990-01-02 1990-01-02 Solid fuel submersible gas generator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU4800099 RU2018508C1 (en) 1990-01-02 1990-01-02 Solid fuel submersible gas generator

Publications (1)

Publication Number Publication Date
RU2018508C1 true RU2018508C1 (en) 1994-08-30

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Application Number Title Priority Date Filing Date
SU4800099 RU2018508C1 (en) 1990-01-02 1990-01-02 Solid fuel submersible gas generator

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RU (1) RU2018508C1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6817298B1 (en) 2000-04-04 2004-11-16 Geotec Inc. Solid propellant gas generator with adjustable pressure pulse for well optimization
RU2495015C2 (en) * 2011-05-25 2013-10-10 Федеральное государственное военное образовательное учреждение высшего профессионального образования Военная академия Ракетных войск стратегического назначения имени Петра Великого МО РФ Firing device for powder pressure generators
US8757263B2 (en) 2006-05-31 2014-06-24 Schlumberger Technology Corporation Downhole cyclic pressure pulse generator and method for increasing the permeability of pay reservoir
RU185885U1 (en) * 2018-07-30 2018-12-21 Общество с ограниченной ответственностью "СТС-ГеоСервис" Device for processing the borehing zone of the string
RU2730058C1 (en) * 2019-11-11 2020-08-17 Общество с ограниченной ответственностью "Промперфоратор" Well pressure generator

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Справочник по прострелочно-взрывной аппаратуре. Под ред. Л.Я.Фридляндера.М.: Недра, 1983, с.61-69, рис.3.2. *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6817298B1 (en) 2000-04-04 2004-11-16 Geotec Inc. Solid propellant gas generator with adjustable pressure pulse for well optimization
US8757263B2 (en) 2006-05-31 2014-06-24 Schlumberger Technology Corporation Downhole cyclic pressure pulse generator and method for increasing the permeability of pay reservoir
RU2495015C2 (en) * 2011-05-25 2013-10-10 Федеральное государственное военное образовательное учреждение высшего профессионального образования Военная академия Ракетных войск стратегического назначения имени Петра Великого МО РФ Firing device for powder pressure generators
RU185885U1 (en) * 2018-07-30 2018-12-21 Общество с ограниченной ответственностью "СТС-ГеоСервис" Device for processing the borehing zone of the string
RU2730058C1 (en) * 2019-11-11 2020-08-17 Общество с ограниченной ответственностью "Промперфоратор" Well pressure generator

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