RU178245U1 - Device for extracting a filter from a borehole - Google Patents

Abstract

A device for extracting a filter from a borehole. A useful model relates to drilling equipment and can be used to replace filter columns of boreholes. The technical task of the utility model is to create a device that is simple in design and can reliably remove the filter from a borehole with minimal cable loads due to symmetric displacement of the rigging rings relative to the axis of symmetry of the plug. The technical result is achieved by the fact that the device for removing the filter from the borehole it includes a plug serving as a load, gripping grooves are made in the bottom of the plug, the plug is, in plan, truncated on the sides parallel to the axis of symmetry of the plug, a circle, with two rigging rings installed in the top of the plug, the lifting rings are symmetrically offset relative to axis of symmetry to the outer circumference of the tube. The application of the proposed design of the device for extracting the filter from the borehole allows you to: - extract the filter of the borehole is simple in design and reliable m device with minimal loads; - to simplify the repair and operation of boreholes. one

Description

The utility model relates to drilling equipment and can be used when replacing filter columns of boreholes.

A device is known for extracting casing from wells, including a pump, an injection sleeve of which is connected to the cavity of the casing, a lift and a plug for sealing the top of the casing, a piston reflector connected by a rod to the lift (USSR Author's Certificate No. 599042, class Е21В 23 / 00, 1978.).

The disadvantage of this device is that when it is used, hydraulic fracturing is possible and there are significant losses of flushing fluid when removing the pipes (filter) from the well.

The closest analogue is a device for extracting a filter from a borehole (Pat. 166401 Russian Federation. Federation: MPK Е21В31 / 20. Device for extracting a filter from a borehole. Akulshin AA, Akulshin AA, Nozratratenko SA No. 2016122122 / 03; application form 06/05/2016; publ. 11/20/2016), including a cork that performs the function of a load, gripping grooves are made in the lower part of the cork, the cork is, in plan, truncated along the sides parallel to the axis of symmetry of the cork, a circle, in a peripheral rigging ring and a central rigging are installed on the top of the plug th ring, the central ring is arranged on the harness plug center and peripheral rigging ring is shifted along the symmetry axis to the outer circumference of the tube.

The disadvantage of this device is the uneven distribution and increased load on the cable when removing the filter due to the shifted center of gravity of the plug.

The technical task of the utility model is to create a device that is simple in design and provides reliable filter removal from the borehole with minimal cable loads due to the symmetric displacement of the rigging rings relative to the axis of symmetry of the tube.

The technical result is achieved by the fact that the device for extracting the filter from the borehole includes a plug that performs the function of a load, gripping grooves are made in the bottom of the plug, the plug is, in plan, truncated on the sides parallel to the axis of symmetry of the plug, a circle, with the top two rigging rings are installed on the part of the plug; rigging rings are symmetrically offset relative to the axis of symmetry to the outer circumference of the plug.

The design of a device for extracting a filter from a borehole is illustrated in FIG. 1, which shows a section AA and a top view of a device for extracting a filter from a borehole.

A device for extracting a filter from a borehole contains a filter column 1, a plug 2, which performs the function of a load, gripping grooves 5, lifting rings 3,4 symmetrically displaced along the axis of symmetry to the outer circumference of the plug, gripping rings 6 are made in the bottom of the plug; represents, in plan, a circle truncated on the sides parallel to the axis of symmetry of the cork.

 A device for extracting a filter from a borehole works as follows: the plug 2 is lowered into the wellbore using a winch and a cable attached to one of the rigging rings 3. When the level below the gripping ring 6 located in the upper part of the filter, the filter column 1 is reached using winch and cable fixed to the second lifting ring 4, the device for extracting the filter is set to a horizontal position until the locking ring 6 of the filter column 1 is fixed in the gripping grooves 5, and then produce lifting of the device for extracting the filter along with the filter string 1 from the wellbore. After removing the filter column 1 from the wellbore, the tension of the cable fixed to the lifting ring 3 is reduced, the device for extracting the filter along the axis of the filter column 1 is rotated, and the device is removed from the filter column 1.

The application of the proposed design of a device for extracting a filter from a borehole allows you to:

- to extract the filter of the borehole with a simple design and reliable device, with minimal loads due to alignment of the center of gravity of the tube along the axis of symmetry;

- simplify the repair and maintenance of boreholes.

Claims (1)

 A device for extracting a filter from a borehole, including a plug serving as a load, gripping grooves are made in the bottom of the plug, the plug is, in plan, truncated on the sides parallel to the axis of symmetry of the plug, a circle, characterized in that in the upper part two rigging rings are installed in the plug, the rigging rings are symmetrically offset relative to the axis of symmetry to the outer circumference of the plug.

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