RU2455452C1 - Vibration damper of stretching, compressing and torsion oscillations - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: device comprises a body, a stem, a nipple, rubber elastic elements. The upper cam is arranged as a whole with a stem. The lower cam is connected via a nipple to the body. The stem and the lower cam interact via a set of cams, between which there are elastic elements. Between the stem cam and the body there are elastic orifices with alternation of metal discs.

EFFECT: higher efficiency of oscillation damping.

1 dwg

Description

The invention relates to the field of oil production and relates to devices for damping oscillations of a deep electric centrifugal pump (ESP).

Known vibration damper comprising a housing, a rod and an elastic element installed between them. The vibration damper in the known device are springs of various designs. The known device has a low efficiency and complex design [1].

It is also known a device for damping vibrations that occur during the operation of an electric centrifugal pump, is installed between the pump and tubing. The device does not dampen the compressive and torsional vibrations, does not transmit the reactive moment of the submersible electric motor to the tubing [2].

The purpose of the invention is the creation of a vibration damper tensile, compressive and torsional vibrations.

This goal is achieved by the fact that to effectively absorb tensile, compressive and torsional vibrations that occur during the operation of a deep borehole electric centrifugal pump, its upper cam is made integral with the rod, the lower cam is connected through a nipple to the body, the interaction of the rod and lower cam is carried out through a set of cams, between which elastic elements are installed, between the cam of the rod and the body are installed elastic washers with alternating metal disks.

A significant difference between the vibration damper is the supply of the rod with the upper cam and the nipple with the lower cam, the interaction of the rod and the lower cam through a set of cams, between which elastic elements are installed, the installation of a set of elastic washers with alternating metal disks between the upper cam and the housing to absorb tensile, compressive and torsional vibrations .

Figure 1 shows a vibration damper for damping tensile, compressive and torsional vibrations excited by an electric centrifugal pump; figure 2 - rod with the upper cam; figure 3 - cam; figure 4 - elastic elements; 5 is a lower cam.

The vibration damper consists of a nipple 1, which is connected to the lower cam 2 by means of a bolt 3, the rod 7 is integral with the upper cam, the cam 2 with the rod 7 interacts with the cams 5, between which the elastic elements 4 are mounted. The device body 9 is connected to the nipple 1 when threaded connection. A seal 6 and a seal 8 between the stem and the housing are installed between the nipple and the stem. To prevent the flap of the housing 9 relative to the nipple 1, a pin 10 is installed.

The device is connected to the pump using the connecting thread 12 and to the tubing string using the connecting thread 11.

Tensile vibrations of the vibration damper are damped by axial compression and expansion of the rubber elements. Therefore, when assembling the vibration damper, the cams are installed with the possibility of axial movement of 3 ... 4 mm.

Compressive loads are absorbed by elastic elements installed between the upper cam and the housing.

Torsional vibrations are damped by compression and expansion of the rubber elements by the protrusions of the cams.

Literature

1. Auth. testimonial. USSR No. 488909, cl. E21 17/06. / Drill shock absorber / B.L. Pelekh, V.M.Shopa, S.V. Velichkovich, Z.D. Vasilechko. - Declared. 02/19/74; publ. 10/25/75. Bull. Number 39.

2. Patent RU 2211986 C1 / Vibration damper / N.V. Salimov, A. F. Yusupov, R. A. Valeev. - Declared. 12/04/2001, publ. 09/10/2003.

Claims (1)

The vibration damper of an electric centrifugal pump, consisting of a housing, a rod, a nipple and rubber elastic elements, characterized in that, in order to effectively absorb tensile, compressive and torsional vibrations arising from the operation of a deep borehole electric centrifugal pump, its upper cam is integral with the rod, the lower cam connected through the nipple to the housing, the interaction of the rod and the lower cam is carried out through a set of cams, between which elastic elements are installed, between the cam of the rod and the housing tanovleny elastic washer with alternating metal discs.

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