RU184421U9 - DEVICE FOR CLEANING THE WALLS OF THE OPERATIONAL COLUMN AND WELL LIQUID - Google Patents

Abstract

The utility model relates to the oil industry and may find application in cleaning a wellbore from deposits and suspended particles of well fluid. A device for cleaning the walls of the production casing and borehole fluid, including a plug (1) sequentially connected from the bottom up, a filter settler (2), a housing (3), a storage container (6), characterized in that the device further comprises a blade blade ( 4) for cutting off corrosion products, salts, asphaltenes, resins, paraffins and a cable head (8) for connecting the device to the rope (10).

Description

The utility model relates to the oil industry and may find application in cleaning a wellbore from deposits and suspended particles of well fluid.

Known well complex for conducting flushing technology, consisting of processing equipment for underground and major wells, production casing, tubing, base part, modular part for cleaning the bottom and the modular part for cleaning the bottomhole formation zone. The basic part includes the technological layout of the hydraulic valve with a bypass valve with an adjustable throttle clutch and pipes with the ability to adjust the fluid flow rate to create depression and use the hydrostatic pressure drop, providing a complete cleaning cycle. The modular part for cleaning the bottom hole contains a drill bit with the possibility of milling and loosening sand plugs, and the modular part for cleaning the bottom-hole zone of the formation includes a slit pipe filter, a screening centralizer and equipment in the form of tubing, which are both a container for collecting dirty liquid and sludge ( patent RU 84048, IPC Е21В 27/00, published on June 27, 2009, bull. No. 18).

A device for processing the walls of the production casing and the bottom of the well, including a hollow body, brushes, the device is additionally equipped with a pen with a valve in the form of a shutter, a hydraulic valve, garbage containers, a check valve, rippers, scraper brushes, templates with cutting working surfaces . A part of the scraper brushes is located between the templates (patent RU 89602, IPC ЕВВ 37/02, published on December 10, 2009, Bull. No. 34)

Closest to the proposed invention in technical essence is a device for cleaning wellbore fluid (patent RU No. 2474672, IPC ЕВВ 27/00, publ. 02/10/2013, Bull. No. 4) including a garbage storage container and a valve with a plug located below filter sump and located above the garbage storage container, slotted nozzle, couplings and lower and upper umbrella-shaped rubber sealant of the annulus of the well, the valve is located in the plug and has a seat diameter larger than the maximum in the well, the filter sump is made with longitudinal slots and closed with a fine mesh mesh with a mesh size less than the minimum size of trapped dirt in the well, the lower umbrella-shaped rubber sealant of the annulus is placed outside the waste container between the two couplings at a distance of 15-20 from the plug % of the total length of the device, the upper umbrella-shaped rubber sealant of the annulus 7 is placed outside the garbage storage container between the two couplings at a distance from the upper its end of the device, equal to 15-20% of the total length of the device, the slotted nozzle is made with longitudinal slots with a width greater than the maximum size of contamination in the well.

A disadvantage of the known technical solutions is that all devices descend on tubing, which significantly lengthens the repair process.

The brushes of the device are not fully removed from the walls of the production casing deposits of corrosion products, salts, asphaltenes, resins and paraffins.

The objective of the proposed technical solution is to expand the functionality of the device, allowing more efficiently clean the well from deposits, more efficiently clean the well fluid from floating debris and mechanical particles.

The technical result is achieved by the fact that the device for cleaning fluid in the wellbore, including the container-accumulator of debris and the filter, further comprises a knife-damper, and located above the container-accumulator of deposits, slotted nozzle, a connecting sleeve for a cable lug.

The figure shows the claimed device.

The device consists of bottom-up plugs 1 of the filter-settler 2, made with longitudinal slots and closed with a fine mesh mesh (not shown in Fig.) With a mesh size less than the minimum size of trapped dirt from the housing 3 with a knife - shutter 4. There are holes 5 in the housing for entering liquids with debris and deposits 9, blocked by a knife - damper 4, depending on the movement of the body of the device 3 in the well. The device descends into the well on the rope 10. The rope is attached to the device through the cable head 8.

The device operates as follows:

When the device 3 moves on the rope 10 down the production casing 7, the knife-damper 4 rises up. Cutting off deposits of corrosion products, salts, asphaltenes, resins and paraffins from the walls of the production casing 7. Deposits, as well as suspended particles and floating debris, are drawn into the device casing 3 by a fluid stream, filtering through the storage container 6. When the bottom of the well is reached, the device starts to rise . When the device is moving up, the holes 5 in the housing 3 are closed with a knife-damper 4, and deposits are filtered in the lower filter-sump 2 from the process fluid and rise to the surface.

The choice of the hole size of the body is greater than the maximum size of the contaminants in the well allows you to collect the entire set of contaminants of any size into the device. The container-drive 6 and the filter sump 2 have holes with a diameter of 8 to 10 mm. The diameters of the holes are determined as a result of the analysis of downhole debris.

Claims (1)

A device for cleaning the walls of the production string and borehole fluid, including a plug, a filter settler, a housing, a storage container, connected in series, characterized in that the device further comprises a knife - a shutter for cutting off corrosion products, salts, asphaltenes, resins, paraffins and a cable head for connecting the device to the rope.

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