RU158059U1 - DEVICE FOR COMPREHENSIVE PROCESSING OF PRODUCTIVE LAYERS - Google Patents

Abstract

A downhole jet installation including a tubing string and mounted on it sequentially from top to bottom: an ink jet apparatus with an active nozzle and a mixing chamber with a diffuser, a packer, characterized in that the ink jet apparatus is configured to communicate and disconnect with the annulus, the active nozzle and the mixing chamber with the diffuser of the jet apparatus is installed in the functional insert; in addition, a cleaning device for the section of the production casing d is installed in the tubing string For landing packer.

Description

The invention relates to inkjet installations used in the oil industry. It provides the ability to comprehensively process the well in one round trip, including cleaning the production casing, which improves the efficiency of processing of productive formations.

From the patent for the invention No. 2059891 publ. 05/10/1996, it is known: a downhole jet installation containing a tubing string and tubing and packer installed on a tubing string in sequence from top to bottom, with an active nozzle and a mixing chamber with a diffuser installed in the housing of the jet apparatus and a channel for supplying a working medium, a channel for supplying a pumped-out medium and a central passage channel with a seat for installing functional inserts were made, and the packer was mounted on a column of tubing below the jet apparatus, while in the central passage channel at the seat as a functional insert, a sealing insert with an axial channel is installed for passing through the last logging cable, on which a geophysical instrument is suspended below the jet apparatus. It provides the possibility of complex treatment of the well in one round trip with the formation of long perforation channels, and thereby increase the efficiency of processing of productive formations.

From the patent for utility model No. 92466, publ. 03/20/2010, a device is known for the integrated treatment of reservoirs, which includes a jet pump and a packer installed on a string of tubing. According to a utility model, the device further comprises a slotted punch or hydromechanical piercing punch installed in the lower part of the tubing string.

From the patent for the invention No. 2246048 publ. 02/10/2005 a well-known jet installation is known, which comprises a tubing string and a jet apparatus and a packer arranged sequentially from top to bottom of the tubing string, wherein an active nozzle and a mixing chamber with a diffuser are installed in the housing of the jet apparatus and a channel is made the supply of the working medium, the channel for supplying the pumped-out medium and the central passage channel with a seat for installing functional inserts, and the packer is installed on the column of tubing below the jet apparatus, while in the central passage channel at the seat as a functional insert there is a sealing insert with an axial channel for passing through the last logging cable, on which a geophysical device is suspended below the jet device, while a check valve is installed in the supply channel of the pumped medium, and at the bottom of the sealing insert there is a bypass valve spring-loaded relative to it, by means of which in its upper position a channel for supplying a pumped medium is higher than the inlet valve is in communication with the sub-packer space of the well. This installation is accepted by us as the closest analogue.

A disadvantage of the known installations is that before the descent, it is necessary to prepare (clean) the inner surface of the production string for the packer to land, which requires an additional expensive tripping operation, which takes considerable time.

The technical result consists in increasing productivity and reducing time for work in the well by expanding the functionality of the downhole jet unit. The expansion of the functionality of the downhole jet installation occurs due to the fact that the active nozzle and the mixing chamber with the diffuser are installed in the functional insert, the tightness of the tubing string is not violated. This allows you to use the device to clean the packer landing site (mechanical scraper, hydromechanical scraper, castellated scraper) as part of the installation and prepare (clean) the inner surface of the production string for the packer to be planted.

The inventive well complex allows you to act on the bottom-hole zone and conduct complex treatment of the well in one round trip, which includes, along with the selection of fluid from the reservoir with a jet pump, cleaning the production string (EC) from drilling mud, cement, fragments, rust, scale, paraffin, perforated burrs and other objects located on the inner walls of the pipes. Thus, when the device for cleaning the packer landing site (mechanical scraper, hydromechanical scraper, castellated scraper) is additionally included in the equipment layout, two downhole operations are combined in one: the auxiliary — to prepare the production string and the main — to select the liquid with a jet pump. This eliminates the need for additional expensive hoisting operations and saves significant time.

The specified technical result is achieved due to the fact that the claimed downhole jet installation, including a string of tubing and installed on it sequentially from top to bottom: an inkjet apparatus with an active nozzle and a mixing chamber with a diffuser, a packer, characterized in that the inkjet apparatus is made without communication with an annulus, an active nozzle and a mixing chamber with a diffuser of the jet apparatus are installed in a functional insert; in addition, a device for purification is installed in the tubing string ki space packer landing.

The following can be used as a device for cleaning the packer landing site: a mechanical scraper (with knives or a brush-brush), a hydromechanical scraper, and a crown-type scraper.

The claimed technical solution is illustrated by the following illustrations.

Figure 1 shows a schematic longitudinal section of an example of the implementation of a downhole jet unit during the preparation of the production casing (EC) section for the packer landing, in which a mechanical scraper with knives was used as a device for cleaning the packer landing site, where:

1 - the upper part of the tubing string (tubing);

2 - inkjet apparatus;

3 - packer;

4 - the lower part of the tubing string;

5 - a mechanical scraper;

6 - scraper knives;

7 - container with recording devices;

8 - perforation interval;

9 - funnel;

10 - plot EC prepared using a scraper.

Figure 2 presents a schematic longitudinal section of a borehole

jet installation with a packer planted in the area of the prepared section of the production casing (EC), where:

1 - the upper part of the tubing string (tubing);

2 - inkjet apparatus;

3 - packer;

4 - the lower part of the tubing string;

5 - a mechanical scraper;

6 - scraper knives;

7 - container with recording devices;

8 - perforation interval;

9 - funnel;

10 - plot EC prepared using a scraper.

Downhole jet installation contains successively from top to bottom: 1 - the upper part of the tubing string, the jet apparatus 2, the packer 3, the lower part of the tubing 4, a scraper 5 with knives 6, a container with recording devices 7, a funnel 9. The scraper 5 with knives 6 is intended for cleaning production casing from drilling mud, cement, fragments, rust, scale, paraffin, perforation burrs and other objects located on the inner walls of the pipes. Cleaning is accompanied by the movement of the entire installation up and down; after cleaning, flushing through the annulus is performed, while the packer 3 is in the transport position. The inkjet apparatus 2 has no communication with the annulus, i.e., it is sealed in relation to the inner cavity of the tubing string — the annulus. The blasting unit is sealed from the mouth to the funnel, which allows flushing the well.

At the end of the flushing, the jet installation is lifted to the packer 3 landing site and installed in the working position, thereby disconnecting the annulus, which does not allow liquid from the upper part of the annulus to enter the lower (sub-packer zone). The functional insert with the active nozzle and the mixing chamber with the diffuser is dropped into the jet apparatus 2. At the same time, we get the message of the inner part of the tubing string — the annulus above the jet apparatus 2. This allows the circulation of the working fluid through the active nozzle, the mixing chamber with the diffuser, the upper part of the annulus and uncoupling of the inner part of the tubing string with the lower part of the jet installation - sub-packer zone. This allows selection from the under-packer zone. The fluid enters the mixing chamber with a diffuser, the upper part of the annulus. At the end of the work, the packer 3 is removed, transferred to the transport position and the subsequent layout lift. All of the above technological operations are recorded by recording devices installed in the container 7. A mechanical scraper 5 with knives 6 is installed on the lower boundary of the scraping interval. The descent speed of the layout should not exceed the minimum descent speed specified in the passport for the units of the jet installation. Cleaning is carried out with a mechanical scraper 5 of the casing section for installing the packer 3 in the interval specified in the work plan. The scraping is carried out by raising and lowering the entire layout by an amount equal to the scraping interval. At the same time, the scraper blades 6 scrape off the deposit (drill mud, cement, fragments, rust, scale, paraffins of other objects) from the inner surface of the production casing. The well is flushed with a kill fluid through the annulus until there are no mechanical impurities in the fluid coming from the well. Then packer 3 is planted, fountain fittings are installed, which are pumped to the pumping unit and flow line to the working capacity of the line, a liquid intake line from the working capacity to the pumping unit. Using a pumping unit, the well is filled with a working fluid, the packer is crimped, and circulation is caused. By increasing the discharge pressure at the pump unit, we achieve the maximum stable inflow from the reservoir. The required volume of fluid is selected.

The inventive downhole jet installation allows you to act on the bottom-hole zone and carry out complex treatment of the well for one tripping, including cleaning the production string. Thus, when an additional device is included in the layout for cleaning the packer’s landing site, two operations are combined: an auxiliary one — to prepare the production casing and the main — to select the liquid with a jet pump into one, which saves considerable time.

Claims (1)

A downhole jet installation including a tubing string and mounted on it sequentially from top to bottom: an ink jet apparatus with an active nozzle and a mixing chamber with a diffuser, a packer, characterized in that the ink jet apparatus is configured to communicate and disconnect with the annulus, the active nozzle and the mixing chamber with the diffuser of the jet apparatus is installed in the functional insert; in addition, a cleaning device for the section of the production casing d is installed in the tubing string For landing packer.

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