SU140011A1 - Hydraulic hammer drill - Google Patents

Description

Hydraulic perforators are known for sparring productive formations in a borehole, running down a cable and equipped with a norokh charge, generating pressure, 1, and a jet of liquid is ejected through nozzles in the housing.

The difference between the hydraulically drilled valve and the known perforator lies in the fact that a cumulative charge, an immersive initial channel in the borehole wall, is embedded in it against each nozzle. E) the perforator can be applied powder blasts, separated from each other by diaphragms, and they are alternately changed. Such an embodiment of the hydraulic perforator makes it possible to increase the penetrating effect of the liquid jet and reduce the consumption of abrasive material.

FIG. 1 depicts the described g droper perforator with a single 10 hr () charge; in fig. 2 - with a compound powder charge.

The hydraulic perforator consists of a steel thick-walled hollow cortex J, the walls of which are wired; 2, pressurized, and 4. The cumulative charges 5 are installed inside each perforator, but the space between them is filled with abrasive l material. Blasting: charge charges are carried out by detonating the cord 6. In the upper part of the body is placed a chamber /, 1a liquid is filled with a floor, which is separated from the lower part of the perforator by a thin diaphragm 8. In the upper part of the body there is a screw-in head 9, in which a powder chamber with a unit of 1 m 1 or a composite powder w of charge W is placed, which is separated from the liquid in chamber 7 by the diaphragm / //, which has a sealed hole 12.

No. 140011-2 In the case of a composite powder charge, his suits are separated from each other by diaphragms 13.

In order to fix the perforator in the casing collar in the upper and lower parts of it, unores 14, sealed with rubber caps 15, are provided. The stops are pulled out of the perforator Cornus under the action of pressure developed during the burning of a powder charge.

To blast a detonating cord, an electric detonator 16 is used, one conductor of which is connected to the cable, and the other is closed to the body mass. Powder charge is ignited by an electric igniter or igniter 17, through a powder retarder Pa.

With a composite powder charge, pomeid is possible, the second powder charge 18 on the underside of the perforator.

Hydraulic perforator works as follows. After the punch is lowered in the borehole when the electric current is switched on, the electric detonator 16 is triggered and, after it, detonating Pt.yur 6 and all cumulative charges 5. The last penetrations from compaction 3 and 4 in nozzles 2, casing wall, cement ring create a shallow channel breed. After the seals have been punctured by cumulative jets and the discharge of the explosion products of cumulative charges has stopped, liquid from the well penetrates into the part of the punch body, which is filled with abrasive material. After charge 5 triggers, due to the action of an electric igniter through the moderator 17a, the combustion of powder charge 10 begins. The pressure of the gases generated during the burning of charges, sealing gaskets are ejected from the orifices 12 of the diaphragm, a liquid with abrasive material breaks through the thin diaphragm 8 and 2 and then in the form of jets into the channels previously punched by cumulative charges 5. At the same time, the stops 14 are pulled out of the body, which fix the perforator in the obsadia tube. Jets of liquid containing abrasive particles continue to deepen the perforation channels. At the end of the burning of the powder charge and decay of the internal pressure, the stops 14 are weakened and retracted by the action of the external hydrostatic pressure, after which the perforator is removed on the surface.

In the case of using the lower powder charge, the upper and lower powder charges are switched on simultaneously.

P redem e1 inventions

1.Hydraulic nonperforator to open productive nl: 1stov in the well, descending on the cable and equipped with powder charge, generating pressure, which shoots a fluid stream through the seaton, characterized in that, in order to increase the striking effect of the fluid jet and reduce the flow rate abrasive material, in it against each nozzle is built a cumulative charge, shooting through the initial channel in the borehole wall.

2. Hydraulic punch no. 1, characterized in that to increase the channel formed and the duration of the jet of liquid with an abrasive material, composite powder charges are used, separated from each other by diaphragms and alternately flammable.

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On page 2, in line 18, you should read seals in nozzles from above.

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