The way to prevent explosions when drilling, development and operation of oil and gas wells (options)

 

The invention relates to the field of ensuring safety in oil and gas. The method includes the displacement of fluid from the well enters the bore of the inert gas mixture. When preparing an inert gas mixture of atmospheric air is pre-compressed by at least two screw compressors. Pass atmospheric air under pressure through the installation, check the oxygen, and compressed to the working pressure of the feed hole in the piston compressor. The drive screw and piston compressors operate from a single drive motor. The flows of compressed air at the outlet of the screw compressor to supply the installation, check the oxygen unite in one thread. In another embodiment, the atmospheric air is pre-compressed by at least one screw compressor and nizkoemissionnymi-speed reciprocating compressor. To the working pressure squeeze in vysokoosmotichnyh the speed reciprocating compressor. The invention improves the performance of the method. 2 S. and 2 C.p. f-crystals, 3 ill.

The invention relates to the field of ensuring safety in oil and gas.

Known way to prevent vzryvopodobnoe solution wash solution, the corrosion inhibitor and other), by injection into the well of inert gas, in particular nitrogen (patent US 3722594, CL E 21 In 21/00, 1973).

There is also known a method of preventing explosions for injection into the well of gaseous agents, including the displacement of drilling fluid from the borehole, compressed to the operating pressure of the feed into the borehole inert gas mixture with an oxygen content not exceeding the minimum explosive concentration (Bronze A. C. Drilling of wells with the use of gaseous agents”, Moscow, “Nedra”, 1979, S. 114-119).

These methods require delivery to the borehole by means of a mobile unit of nitrogen bottles, which leads to interruption of the process of exploration wells for periodic refueling installation of nitrogen.

The closest to the invention is a method, which consists in the displacement of drilling fluid from the borehole, compressed to the working pressure vysokopatogennyj the speed compressor inert gas mixture, which is obtained from atmospheric air by means of its pre-compression nizkoemissionnymi stages of the compressor and passing through the installation, inhibiting oxygen and water vapor, the oxygen content in the recip is soba is the lack of performance nishinoshima stage of the compressor.

An object of the invention is to increase the productivity of the method.

In the first variant of the method the problem is solved in that in the method of preventing explosions in the drilling, development and operation of wells, including the displacement of fluid from the well enters the bore of the inert gas mixture, and in the preparation of inert gas mixture is pre-compressed air, put it under pressure through the installation, check the oxygen, and compressed to the working pressure of the feed into the borehole, the preliminary compression of air is realized by at least two screw compressors and compressed to the working pressure is carried out in a piston-type compressor, and a drive screw and piston compressors operate from a single drive motor, thus, streams of compressed air at the outlet of the screw compressor to supply the installation, check the oxygen unite in one stream.

The drive screw compressors provide one pinion mounted on the shaft connecting the drive motor and the piston compressor.

In the second variant of the method the problem is solved in that in the method of preventing explosions in Bure the gas mixture, in preparing the inert gas mixture is pre-compressed air, put it under pressure through the installation, check the oxygen, and compressed to the working pressure of the feed into the borehole, the preliminary compression of air is realized by at least one screw compressor and nizkoemissionnymi-speed reciprocating compressor, and compressed to the working pressure is carried out in vysokoosmotichnyh the speed reciprocating compressor, and a drive screw and piston compressors operate from a single drive motor, and the flows of compressed air at the outlet of the screw compressor and nizkoentropiinykh-speed reciprocating compressor prior to submission to the installation, check the oxygen unite in one stream.

The drive each screw compressor implement pinion mounted on the shaft connecting the drive motor and the piston compressor.

In Fig.1 shows a diagram of the process flow of inert gas mixture into the well of Fig.2 and 3 options to perform the installation for the generation and compression of the inert gas mixture.

When drilling, development, processing, removal of sand and clay tubes, drainage and dewatering of attanandana washing liquid is performed by injection into the annular space between the casing 1 and the tubing 2, any discharge on the tubing compressed inert gas mixture.

To do this, use mobile compressor station containing nishinoshima step 3, install 4 production inert gas mixture and the booster stage 5. Nishinoshima step may contain, for example, two screw compressor 6 and 7 or screw compressor 8 and nishinoshima stage 9 of the piston compressor. The drive screw compressors 6, 7 and 8 through the gear 10 mounted on the shaft 11 connecting the drive motor 12 and piston compressor.

Booster stage can contain reciprocating booster compressor 13 or vysokotochnye stage 14 of the piston compressor.

Installation can contain a larger number of compressors. Number of compressors and their performance are determined from the conditions of continuity of the compressor system and provide pressure sufficient for the effective displacement of fluid from the well.

Claims

1. The way to prevent explosions when drilling, development and operation of wells, including the displacement of fluid from the well enters the borehole inert gas cm is under pressure through the installation, check oxygen, and compressed to the working pressure of the feed into the borehole, wherein the pre-compression of air is realized, at least two screw compressors and compressed to the working pressure is carried out in a piston-type compressor, and a drive screw and piston compressors operate from a single drive motor, and the flows of compressed air at the outlet of the screw compressor to supply the installation, check the oxygen unite in one stream.

2. The method according to p. 1, characterized in that the drive screw compressors provide one pinion mounted on the shaft connecting the drive motor and the piston compressor.

3. The way to prevent explosions when drilling, development and operation of wells, including the displacement of fluid from the well enters the bore of the inert gas mixture, and in the preparation of inert gas mixture is pre-compressed air, put it under pressure through the installation, check the oxygen, and compressed to the working pressure of the feed into the borehole, wherein the pre-compression of air is realized at least one screw compressor and nizkoemissionnymi STU is newago compressor, moreover, the drive screw and piston compressors operate from a single drive motor, and the flows of compressed air at the outlet of the screw compressor and nizkoentropiinykh-speed reciprocating compressor prior to submission to the installation, check the oxygen unite in one stream.

4. The method according to p. 3, characterized in that the driven screw compressor implement pinion mounted on the shaft connecting the drive motor and the piston compressor.

 

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EFFECT: facility prevents exhaust of dust into environment due to advanced swelling of elastic hollow element sealing head of blast hole relative to beginning of dust blowing off; it also reduces duration of blast holes cleaning due to the most functionally efficient system of compressed air circulation, and increases efficiency.

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