RU142465U1 - HEAD - Google Patents

Abstract

1. Borehole head for an electric submersible pump, comprising: a cover with a group of holes for threaded connecting elements located around the perimeter at a distance from each other, a flange with a group of holes for threaded connecting elements located around the perimeter at a distance from each other, a set of threaded connecting elements, an elastic annular gasket, the upper end of said flange is provided with a substantially flat annular platform for said gasket, the lower surface of said cover is provided on a substantially flat annular area for said gasket, said annular area around its perimeter is provided with a collar with a substantially cylindrical inner surface, the height of said collar being less than the height of said gasket in an undeformed state, the width of said gasket is such that when it is located between said collar and said pipe, after applying force to the lid, it is pressed against the outer surface of said pipe and to said rim, mentioned from ERSTU in the lid and flange are arranged so as to allow installation of said connector elements and contraction of said cover and flange around their perimetru.2. The cap according to claim 1, wherein said substantially flat surface of the lid and / or flange and / or the surface of said flange is provided with groups of concentric protrusions and / or depressions in the contact area with the gasket to increase the tightness. The cap according to claim 1, wherein said cover is provided with a fitting for an electric submersible power cable �

Description

FIELD OF TECHNOLOGY

The invention relates to the field of equipment for sealing casing pipes, pressure pipelines of submersible pumps and power cables.

BACKGROUND

From the description of the RF patent for utility model No. 76033, a borehole head is known that contains a cover with a conical surface and a central axial bore coaxially mounted on the well casing and a pressure flange with a central axial bore, a rubber sealing ring located between the conical surface of the cover and the flange, set coupling bolts with nuts installed in the coaxial holes of the cover and the flange, characterized in that at the end of the cover facing the flange, an annular collar with Cored oil conical surface, the vertex of which facing the opposite flange, and the clamping flange and a sealing rubber ring mounted on the outer side of the casing, wherein the coaxial holes in the lid and flange are also formed on the outer side of the casing.

A disadvantage of the known head, preventing the achievement of the following technical result, is that when tightening the bolts to different lengths, the cover is skewed on the casing, which can lead to depressurization of the joint.

DISCLOSURE OF A USEFUL MODEL

The objective of this utility model is to create a head that seals the casing of the well, as well as the pressure pipe and power cable of the submersible electric pump, which would be free from the listed disadvantages of the prototype.

The technical result achieved by using the proposed tip is that the contact area of the gasket to the cover is increased and the skew of the cover, uneven aging of the gasket, and extrusion of the gasket during freezing of the joint are excluded, which together provides increased reliability and tightness of the head.

The above problem is solved due to the fact that the proposed borehole tip 1 for an electric submersible pump, contains:

cover 4 with a group of holes for threaded connecting elements located around the perimeter at a distance from each other,

a flange 5 with a group of holes for threaded connecting elements located around the perimeter at a distance from each other,

set of threaded connecting elements 16, 17 and 18,

elastic ring gasket 10,

the upper end of said flange 5 is provided with a substantially flat annular area for said gasket 10,

the lower surface of said cover is provided with a substantially flat annular area for said gasket 10,

said annular area around its perimeter provided with a rim with a substantially cylindrical inner surface, while

the height of said rim (H) is less than the height of said gasket 10 in an undeformed state,

the width of said gasket (L) is such that when it is located between said flange and said pipe, after applying force to the cover, it is pressed against the outer surface of said pipe and to said flange,

said openings in the cover and flange are arranged in such a way as to enable installation of said connecting elements 16, 17 and 18 and tightening said cover and flange around their entire perimeter.

Cover 4, flange 5, gasket 10 and threaded connecting elements 16, 17 and 18 are necessary to create a sealed volume, while the surfaces in contact with the gasket 10 with less curvature than the gasket 10, their orientation parallel to each other and the presence of the side increases the contact area of the deformed gasket, and the adjacency of the flange butt to the flange 5 allows you to completely eliminate the skew of the cover 4 and knocking out of the gasket 10 when the water-filled joint freezes.

Mentioned essentially flat surface of the cover 4 and / or flange 5 and / or the surface of the said rim can be (but not necessarily) provided with groups of concentric protrusions and / or depressions in the contact zone with the gasket to increase the tightness.

Mentioned cover 4, as follows from its purpose, is equipped with an element for passing the cable of a submersible electric pump, in particular (but not limited to this option), can be equipped with a fitting 2 for cable.

Said cable entry 2 may be (but not necessarily) provided with an packing and / or heat-shrink sleeve.

As follows from the purpose of tip 1, the cable entry should be placed near the cover openings located at a distance from the axis not exceeding the radius of the casing.

The mentioned cover 4, as follows from its purpose, is equipped with an element for passing the discharge line of the pump, in particular, it can be (but not limited to this option) equipped with an opening for connecting the discharge line of the submersible pump, an oil seal (8, 9 and 10) for sealing the connection between the discharge line and the inner surface of the cover 4 and the fitting 21 for connecting the pipeline to the cover 4 from the outside.

The fitting 21 for the pipeline can be (but not necessarily) equipped with a collet clamp.

Said gasket 10 may be (but not necessarily) made of rubber.

Said spacer 10 may (but not necessarily) have a ring shape with a round, oval, trapezoidal, barrel-shaped and / or rectangular cross-section.

Said threaded connecting elements 16, 17, 18 may (but not necessarily) be bolts, studs, screws and / or nuts.

The inner surface of the lid may (but not necessarily) be provided with a hook, a carabiner 1, a bracket and / or an eye-nut 13, for attaching a safety cable to said submersible electric pump.

Said eye-nut 13 can be (but not necessarily) fixed to the cover 4 by means of a bolt, the head of which is sealed by means of a rubber ring 12.

The outer surface of the cover 4 may be (but not necessarily) additionally provided with an eye bolt 14.

The above tip 1 can be used to seal:

a) casing pipes in a wide range of diameters (preferably from 133-152 mm);

b) pressure pipelines of submersible pumps in a wide range of diameters (preferably 25-32 mm);

c) power cables for submersible pumps.

BRIEF DESCRIPTION OF THE DRAWING

The figure schematically shows a section of a flange assembly.

The meaning of the positions in the figure is explained below on the example of a design description of one of the possible particular forms of execution of the head.

IMPLEMENTATION OF A USEFUL MODEL

The casing is sealed by compressing the rubber ring 10 or 11 with a set of compression parts (bolts 16, nuts 17, spring washers 18 and flat washers 22). The rubber ring 10 or 11 is placed in the cylindrical recess of the cover 4 and is compressed by the outer ends of the cover 4 and the flange 5 until they are in full contact.

The pressure pipe from the downhole pump is attached to the head cover using a compression fitting (parts 6, 7, 8) and is sealed with a rubber ring 9. To do this, after installing the pressure pipe, the fitting sleeve is tightened. This design not only seals the pressure pipe, but also ensures the retention of the pump in the well. To ensure that the pump does not fall into the well, a carabiner is hung on the eye-nut 13, which is attached to the cover 4 with a set of fasteners (bolt 15 and washer 12). The bolt 15 is sealed with a rubber ring 19. A safety steel cable from the borehole pump is attached to the carabiner.

The mains supply cable from the pump passes through a flexible sealed cable entry 2 installed in the cap cover with a rubber sealing strip 20.

The assembly of the head structure is carried out before the pump is immersed in the well. In this case, the coupling bolts 16 must be unscrewed to the maximum length. The head is installed all the way into the end face of the casing. Previously, at the end of the casing pipe, a 2 mm entry chamfer is cut off at an angle of 30 degrees. Before installing the tip, the end of the casing and the rubber ring 10 or 11 are wetted with water to facilitate fit on the casing. After assembly, the bolts 16 are tightened to the maximum length until the cover 4 contacts the flange 5 along their entire perimeter. The main pipeline is connected to a brass fitting 21 with an inch thread mounted in the cover, which increases the lifetime of the head during repeated installation.

The cover 4 and the flange 5 can be made of any material of suitable strength, in particular plastic, composite material or metal. The surface of the cover 4 in contact with the metal elements can be reinforced with metal embedded parts. Fasteners and parts experiencing high loads are preferably made of metal.

The tip protects the well from contamination with groundwater and foreign particles and objects and makes it easy for the user to install the pump station.

The proposed design of the head does not require qualified personnel during installation and eliminates the distortion of the cover on the casing.

Claims (11)

1. Borehole head for an electric submersible pump, comprising: a cover with a group of holes for threaded connecting elements located around the perimeter at a distance from each other, a flange with a group of holes for threaded connecting elements located around the perimeter at a distance from each other, set of threaded connecting elements, elastic ring gasket, the upper end of said flange is provided with a substantially flat annular area for said gasket, the lower surface of said lid is provided with a substantially flat annular area for said gasket, said annular area around its perimeter provided with a rim with a substantially cylindrical inner surface, while the height of said side is less than the height of said gasket in an undeformed state, the width of said gasket is such that when it is located between said flange and said pipe, after applying force to the cover, it is pressed against the outer surface of said pipe and to said flange, said openings in the lid and flange are arranged in such a way as to enable installation of said connecting elements and tightening of said lid and flange around their entire perimeter. 2. The cap according to claim 1, in which the aforementioned essentially flat surface of the cover and / or flange and / or the surface of the said side is provided with groups of concentric protrusions and / or depressions in the contact zone with the gasket to increase the tightness. 3. The cap according to claim 1, wherein said cap is fitted with a fitting for a power cable of an electric submersible pump. 4. The head of claim 5, wherein said cable entry fitting is provided with an packing and / or heat-shrink sleeve. 5. The cap according to claim 1, wherein said cap is provided with an opening for connecting the discharge line of the submersible pump, an packing seal for sealing the connection between the discharge line and the inner surface of the cap and a fitting for connecting the pipe to the cap on the outside. 6. The head of claim 1, wherein said gasket is made of rubber. 7. The head of claim 1, wherein said gasket is in the form of a ring with a round, oval, trapezoidal, barrel-shaped and / or rectangular cross-section. 8. The cap according to claim 1, in which said threaded connecting elements are bolts, studs, screws and / or nuts. 9. The cap according to claim 1, in which the inner surface of the lid is equipped with a hook, carabiner, bracket and / or eye-nut, for fastening the safety cable of said submersible electric pump. 10. The cap according to claim 9, in which the said eye-nut is mounted on the lid by means of a bolt, the head of which is sealed by means of a rubber ring. 11. The cap according to claim 1, in which the outer surface of the lid is additionally equipped with an eye bolt.

Images