RU142914U1 - MILLING DEVICE (OPTIONS) - Google Patents

Abstract

1. A milling device comprising a milling cutter consisting of a cylindrical body, the upper end of which is threaded for connection to a drill pipe string provided with blades with cutting elements made in the form of step-type plates and soldered onto the blades, characterized in that it is detachable and composed of a milling cutter and a centering device, while the blades are made integrally with a cylindrical body and are located along its entire length, and the centering device contains a guide rod with cylin dical and conical surfaces in its lower part, on which the cutting elements are located in the form of surfacing, while the milling cutter and the centering device are connected to each other by a threaded connection. 2. A milling device according to claim 1, characterized in that the surfacing has a straight direction and are parallel to the axis of the guide rod. The milling device according to claim 1, characterized in that the surfacing has a spiral direction along the cylindrical and conical surfaces of the guide rod in its lower part, respectively. A milling device comprising a milling cutter consisting of a cylindrical body, the upper end of which is threaded for connection to a drill pipe string provided with blades with cutting elements made in the form of step-type plates and soldered onto the blades, characterized in that it is detachable and composed of milling cutter and device for creating additional axial load, while the blades are made as a whole with a cylindrical body and are located along its entire length, and the device for creating additional oh ��

Description

The utility model relates to the oil and gas industry, is designed to restore and repair wells for cleaning the bottom when using a milling cutter used in conjunction with a centering device (Option 1) or a device for creating additional axial load (Option 2).

Known milling tool for cutting a “window” in the casing of a borehole and subsequent drilling, consisting of a lower and a cylindrical part, including a hollow body and blade working surfaces with diamond-containing plates in the lower part and milled blades reinforced with a cutting-abrasive coating, the cylindrical part, RU No. 131410 U1, B21B 29/00, 08/20/2013.

A device for repairing production wells is known, including a hollow cylindrical body mounted on its surface with the possibility of axial movement of the die, provided with teeth on the outside, which are rectangular triangles in cross section, RU No. 30824 U1, B21B 29/00, 07/10/2003.

Known milling machine, including a cylindrical body with flushing holes, the upper end of which has a thread for connection to a drill pipe string, a cutting tool with cutting elements made with wear-resistant plates, and further comprising auxiliary equipment with main cutting elements or a guide, RU No. 34620 U1, B21B 29/00, 12/10/2003.

Known column milling machine, consisting of a cylindrical body with a conical lower part and a connecting thread for fastening drill pipes to the string, teeth are located on the body along its axis on the conical and partially cylindrical surfaces, RU No. 1255619 U1, B21B 29/00, 03/10/2013 .

Known downhole milling cutter, consisting of a cylindrical body, the upper end of which is threaded to connect to the drill pipe string, equipped with blades with cutting elements made in the form of step-type plates and soldered onto the blades, RU No. 111882 U1, B21B 29/00, 27.12. 2011.

Known milling cutter pilot, consisting of a cylindrical body, the upper end of which is threaded to connect to the drill pipe string, equipped with blades with cutting elements made in the form of stepped type plates and soldered onto the blades, and from a guide rod with cutting elements in its lower part, RU No. 113535 U1, B21B 29/00, 02.20.2012.

This technical solution was adopted as the closest analogue of this utility model.

The mill of the closest analogue consists of a milling part and a pilot part, which centers the milling part relative to the axis of the column.

The cutting elements of the closest analogue, located on the bottom of the guide rod, made in the form of surfacing, provide continuous contact with the walls of the emergency object, centering the milling cutter and its optimal operation, and blades with cutting elements in the form of step-type plates realize the effect of self-sharpening and increase the resistance of the milling cutter and the effectiveness of his work.

However, in the closest analogue, the implementation of the milling and pilot parts, as one product, limits the use of the milling cutter for other repair or restoration of wells, which reduces operational capabilities.

In addition, in the closest analogue, the blades on a cylindrical body are made in its lower part, which reduces operational capabilities.

The present utility model is based on the solution of a problem that allows expanding and increasing the operational capabilities of a milling device during the repair or restoration of wells.

The technical result of this utility model consists in making the milling device detachable two-part in the presence of a threaded connection with the possibility of attaching to the milling centering device with a guide rod (Option 1) or a device for creating additional axial load in the form of a pipe (Option 2) and in the location of the blades along the entire length cylindrical body.

According to a utility model, this problem is solved due to the fact that the milling device (Options 1, 2) includes a milling cutter consisting of a cylindrical body, the upper end of which is threaded for connection to the drill pipe string, equipped with blades with cutting elements made in the form of step plates type and soldered onto the blades.

The milling device (Option 1) is made detachable two-part and consists of a milling cutter and a centering device.

The blades are made as a unit with a cylindrical body and are located along its entire length.

The centering device comprises a guide rod with cylindrical and conical surfaces in its lower part, on which the cutting elements in the form of surfacing are placed.

In this case, the milling cutter and the centering device are connected to each other by a threaded connection.

In addition, the weld depositions have a straight line direction and are parallel to the axis of the guide rod.

In addition, the weld depositions have a spiral direction along the cylindrical and conical surfaces of the guide rod in its lower part, respectively.

The milling device (Option 2) is made detachable two-part and consists of a milling cutter and a device for creating additional axial load.

The blades are made as a unit with a cylindrical body and are located along its entire length.

The device for creating additional axial load is made in the form of a pipe, while the milling cutter and the pipe are connected to each other by a threaded connection.

The applicant has not identified sources containing information on technical solutions identical to this utility model, which allows us to conclude that it meets the criterion of "novelty."

The essence of the utility model is illustrated by drawings, which depict:

in FIG. 1 - Milling device with a milling cutter and a centering device, surfacing in a straight line direction, general view (Option 1);

in FIG. 2 - Milling device with a milling cutter and a centering device, helical surfacing, general view (Option 1);

in FIG. 3 - Milling cutter, cut (Options 1, 2);

in FIG. 4 - Centering device with cutting elements in the form of a straight-line surfacing, section (Option 1);

in FIG. 5 - Centering device with cutting elements in the form of helical surfacing, section (Option 1).

in FIG. 6 - Milling device with a milling cutter and a device for creating additional axial load, general view (Option 2).

The milling device contains:

Options 1, 2

Fraser - 1,

cylindrical body (milling 1) - 2,

connecting thread to the drill pipe string (on the housing 2) - 3,

blades (body 2) - 4,

cutting elements in the form of stepped type plates (soldered onto blades 4) - 5.

Option 1

Centering device - 6,

guide rod (devices 6) - 7,

cylindrical surface (in the lower part of the rod 7) - 8,

conical surface (in the lower part of the rod 7) - 9,

cutting elements in the form of a straight-line surfacing (on surfaces 8 and 9) - 10,

cutting elements in the form of helical surfacing (on surfaces 8 and 9) - 11.

Threaded connection (milling cutter 1 and device 6) - 12.

Option 2

The device for creating additional axial load in the form of a pipe - 13.

Threaded connection (router 1 and device 13) - 14.

The milling device (Options 1, 2) includes a milling cutter 1, consisting of a cylindrical body 2, the upper end of which is equipped with a thread 3 for connection to the drill pipe string.

The cylindrical body 2 is equipped with blades 4 with cutting elements made in the form of step type plates 5 and soldered onto the blades 4.

The milling device (Option 1) is made detachable two-part and consists of a milling cutter 1 and a centering device 6.

The blades 4 are made as a single unit with a cylindrical body 2 and are located along its entire length.

The centering device 6 contains a guide rod 7 with a cylindrical 8 and conical 9 surfaces in its lower part, on which cutting elements are placed in the form of surfacing 10 or 11.

The milling cutter 1 and the centering device 6 are connected to each other by a threaded connection 12.

Surfacing 10 have a rectilinear direction and are parallel to the axis of the guide rod 7.

Surfacing 11 has a spiral direction along the cylindrical 8 and conical 9 surfaces of the guide rod 7 in its lower part, respectively.

The milling device (Option 2) is made detachable two-part and consists of a milling cutter 1 and a device for creating additional axial load 13.

The blades 4 are made as a single unit with a cylindrical body 2 and are located along its entire length.

A device for creating additional axial load 13 is made in the form of a pipe, while the milling cutter 1 and the pipe 13 are connected to each other by a threaded connection 14. The operation of the milling device is as follows.

The milling device is designed to work on cleaning the face having a central hole (for example, a cemented pipe) and provides a maximum channel area for the removal of milling products from the working area.

The milling cutter 1 (Options 1, 2) is an independent product and has a threaded connection 12 (Option 1) and a threaded connection 14 (Option 2) from the bottom.

This makes it possible to attach to the mill 1 any other conical mill as a centering device or to carry out preventive work with the working centering device 6 (Option 1).

This makes it possible to use the milling device for other operating conditions and attach to the mill 1 a device for creating additional axial load in the form of a pipe 13 (Option 2). This milling device is used when milling large sections of cemented pipe strings, liner suspensions and casing liners themselves, etc.

The use of the milling cutter 1 (Options 1, 2) with blades 4 located along the entire length of the cylindrical body 2 allows you to increase the duration of the milling device and, as a result, reduce the number of tripping operations, which increases its operational capabilities.

The execution of the milling device with detachable two-part in the presence of a threaded connection with the possibility of attaching to the milling centering device with a guide rod (Option 1) or a device for creating additional axial load in the form of a pipe (Option 2) expands its operational capabilities.

The proposed milling device contains parts and assemblies that are widely used in the oil and gas industry, and its manufacture at LLC Scientific-Production Firm Zavod Measuring Plant and the pilot tests carried out determine, in the applicant’s opinion, that his criterion is “industrial applicability”.

Claims (4)

       1. A milling device comprising a milling cutter consisting of a cylindrical body, the upper end of which is threaded for connection to a drill pipe string provided with blades with cutting elements made in the form of step-type plates and soldered onto the blades, characterized in that it is detachable and composed of a milling cutter and a centering device, while the blades are made integrally with a cylindrical body and are located along its entire length, and the centering device contains a guide rod with cylin dical and conical surfaces in its lower part, on which the cutting elements are located in the form of surfacing, while the milling cutter and the centering device are connected to each other by a threaded connection.        2. The milling device according to claim 1, characterized in that the surfacing has a straight direction and are parallel to the axis of the guide rod.        3. The milling device according to claim 1, characterized in that the surfacing has a spiral direction along the cylindrical and conical surfaces of the guide rod in its lower part, respectively. 4. A milling device comprising a milling cutter consisting of a cylindrical body, the upper end of which is threaded for connection to a drill pipe string provided with blades with cutting elements made in the form of step-type plates and soldered onto the blades, characterized in that it is detachable and composite of the milling cutter and the device for creating additional axial load, while the blades are made as a whole with a cylindrical body and are located along its entire length, and the device for creating an additional oh an axial load is made in the form of a tube, the tube and cutter are connected to each other by threaded joints.