RU159842U1 - FILTER ROD CONE - Google Patents

Abstract

A cone rod filter containing a flange and a bottom, between which longitudinal elements are installed in the form of rods and support rings, which tighten the rods from the outside with the formation of slots for the mud flow between them, the rods with rings assembled to form a cone, the flange is fixed to the crosspiece, for example, with screws, and the rods are made of stainless steel and are located with the formation of gaps between them with a width of 2 to 8 mm.

Description

The utility model relates to the field of mining and can be used for drilling water, oil, gas wells and underground leaching wells and is designed to clean drilling fluid from large mechanical impurities in order to prevent failure of the drilling tool or equipment, as well as to prevent getting into foreign bodies drill pipe string: dirt, scale, etc. in the process of changing a drilling tool or equipment.

A drill string filter is known, comprising a body and a perforated cup installed in the body cavity, the filter having a cylindrical filter mesh located in the annular cavity between the body and the cup and connected by one base to the body and the other to the base of the cup, the latter having the possibility of axial limited movement relative to the housing (RF patent for IZ No. 1122813, CL. E21B 43/08. publ. 11/07/1984).

A disadvantage of the known drill string filter is that it does not prevent foreign bodies from entering the drill pipe string during a drilling tool or equipment change.

A well filter is also known, including a perforated frame made of non-magnetic material, a filter jacket in the form of autonomous sections with a winding by spacer elements in the form of support rods and connecting elements, in which annular permanent magnets are installed on the perforated frame from each other and are filter centralizers, the winding of the filter jacket of the perforated frame is formed by the inner and outer layers in the form of a non-magnetic nylon cord of a single profile, the inner the winding layer is formed by turns located at a distance from each other, the outer layer of the winding is formed by turns tightly located to each other 2

or in the form of a synthetic fabric mesh, the connecting elements are made in the form of an upper and lower sub, and the upper sub is made as left-right, and the filter is additionally equipped with a sump connected to the lower sub and located at the bottom of the filter with a flushing valve (patent from the Russian Federation No. 2478775, CL E21B 43/08, E03B 3/18, publ. 04/10/2013).

The known filter is not sufficiently ineffective when cleaning the drilling fluid from large mechanical impurities that can damage the filter elements and prematurely disable it.

A well filter is also known, including a filtering shell with a base element in the form of a pipe, longitudinal elements in the form of rods and support rings, which are made with external grooves under the longitudinal elements and internal grooves forming longitudinal channels with the base element, while the longitudinal elements are made of rods in the form of rectangular triangles, the legs of which form the outer diameter of the filter shell, and the sharp angles are installed in the longitudinal channels with the formation of one-sided extensions and echeniem directed flows filtered agent (Patent RF OUT on №2284408, Cl. E21B 43/08, E03B 3/18, publ. 27.09.2006).

A disadvantage of the known filter is that it is not intended for cleaning the drilling fluid, as well as the complexity of its revision and replacement in case of failure.

Closest to the claimed utility model is a rod-shaped conical filter containing a flange and a bottom, between which longitudinal elements in the form of rods and support rings are installed, on the outside there are pulling rods with the formation of gaps between them for the mud flow, and the rods with rings assembled cone (US patent No. 6598685 B1, 2003).

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A disadvantage of the known filter rod cone is the complexity of the process of replacing it in case of failure.

The objective of the utility model is to increase the usability of the filter by simplifying the process of replacing it in case of failure.

The problem is solved by the proposed rod-shaped conical filter containing a flange and a bottom, between which longitudinal elements are installed in the form of rods and support rings, pulling rods on the outside with the formation of slots for the mud flow between them, and the rods with rings assembled form a truncated cone, the flange is fixed to the crosspiece, for example, with screws, and the rods are made of stainless steel and are located with the formation of gaps between them from 2 to 8 mm in size.

The utility model is illustrated in the drawing, where in FIG. 1 shows the proposed filter rod conical, containing the axis 4, on which the crosspiece 7 is mounted, to which, using screws 9, a flange 1 is attached, to which longitudinal elements 8 are welded or glued in the form of rods. The rods 8 are pulled together by support rings 2, 3, 4, 5 from the outside to strengthen the structure, and the rings themselves have different diameters, which decrease in the direction from top to bottom. On the other hand, the rods 8 are attached to the bottom 6. Assembled, the rods 8 with rings are in the form of a truncated cone, and between the rods there are slots for the drilling fluid duct, which can be from 2 to 8 mm wide. The rods 8 and rings are made of stainless steel, for example, a bar with a diameter of 3-7 mm. The filter is installed under the lead drill pipe (“square”) in the coupling part of the sub (pipe). The implementation of the filter in the form of a cone allows you to increase the clearance for the passage of drilling fluid into the drill string.

The proposed filter rod cone is used as follows. With each drill string extension (from approximately 4

ten minutes to five hours of drilling fluid circulation) the filter is removed from the sub (pipe) (not shown in the drawing), cleaned of dirt, debris, large mechanical impurities and drilling fluid, visually checked for washes and moved to the upper extended sub (pipe) . If there is a malfunction, the filter is replaced with a new one. To do this, the screws 9 are unscrewed and the filter is removed from the crosspiece 7, which can be made in the form of a cross or a three-pointed star to facilitate the flow of drilling fluid into the filter. Such fastening of the filter to the crosspiece improves the usability of the filter by simplifying and accelerating the process of replacing it in case of failure. During operation of the filter, drilling fluid flows from above and enters the drill string through slots between the rods. In this case, large impurities are retained by the filter. The filter is capable of passing up to 70 l / s of drilling fluid.

The proposed filter is easy to manufacture, cheap and easy to replace with a new one, which increases convenience and reliability.

Claims (1)

A cone rod filter containing a flange and a bottom, between which longitudinal elements are installed in the form of rods and support rings, which tighten the rods from the outside to form slots for the mud flow between them, the rods with assembled rings form a cone, the flange is fixed to the crosspiece, for example, with screws, and the rods are made of stainless steel and are located with the formation of gaps between them with a width of 2 to 8 mm.

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