RU31400U1 - Downhole hydraulic vibrator - Google Patents

Description

Downhole hydraulic vibrator

The utility model relates to the oil industry and can be used to impulse impact on productive formations in order to intensify the processes of oil extraction or water injection

Known hydraulic vibrator comprising a housing with a fixed barrel installed in it with a spool 1. The barrel and spool are made with slotted slots located under to their generatrix. The spool is mounted on bearings, and there is a bottom hole in the barrel.

A disadvantage of the known vibrator is that to bring it to the optimum operating mode of -100 ... 200 Hz, a large flow rate of liquid is required, of the order of 20 l / s, which can be unattainable even with two pumping units CA-320.

Closest to the claimed is a downhole vibrator comprising a housing with a barrel mounted therein on bearings with slotted slots made at an angle to their generatrix, and a cylindrical hole in its lower part and a spool mounted on bearings with slotted slots made at an angle to the generatrix and in the opposite direction to the slotted slots of the trunk. The axial channel in the barrel is made in the form of a diffuser nozzle, and a reflector for radial discharge of the working fluid 2 is installed in the lower part of the housing.

The known vibrator provides effective treatment of wells by increasing the amplitude of the pulses of hydrodynamic pressure, and the direction of their propagation in the intervals of the layers. However, it is not possible to extract the vibrator from the well without raising the tubing string. In addition, the vibrator is subject to intense wear from mechanical impurities entering the cleaned working fluid already in the well.

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The technical challenge facing the utility model is to increase the durability and provide the ability to extract the vibrator from the well without lifting the tubing string.

To solve the technical problem in a borehole hydraulic vibrator, we contain a housing with side helical slots, a barrel with an axial channel and side helical inclined slots, mounted in the housing on bearings with the possibility of periodic overlapping of the side helical slots, and a reflector mounted below the barrel to release part working fluid in the radial direction, the housing is additionally equipped with a seat for installing a vibrator in the seat of the landing sleeve included in the layout of the pump-compressor string weed pipes, a fishing head for removing it from the well and a filter for the inlet of the working fluid.

In the drawing: in FIG. 1 is a diagram of a downhole hydraulic vibrator; in FIG. 2 is a view along AA in FIG. 1

The downhole hydraulic vibrator comprises a housing 1 with lateral slotted slots 2. In the housing 1, on the bearings 3, a barrel 4 is installed with a central axial channel 5 expanding to the bottom and lateral slotted slots 6 made inclined to release the working fluid at an angle to the radial direction.

Bottom of the housing 1 is equipped with a reflector, including radial holes 7 and a reflective cone 8, mounted in the housing at the level of these holes.

In the upper part, the housing 1 is equipped with a fishing head 9 and a landing belt 10, between which there is a slotted filter 11.

For descent into the well, the vibrator can be installed in advance by the landing belt 10 in the seat of the landing sleeve 12, screwed onto the pump and compressor pipes, lowered into the well.

in both cases, the downhole hydraulic vibrator is lowered into the well to the depth of the perforation zone of the reservoir. When applying to the column of working fluid, the barrel 4 comes into rotation, which leads to periodic overlapping of slotted slots in the body and the barrel and the generation of pressure waves transmitted to the reservoir.

The execution of the Central axial channel 5 expandable provides for a flow rate of 5 to 10 l / s pulse frequency of 10 to 150 Hz and a pressure amplitude of 1 to 4.5 MPa.

The reflector reduces the amount of energy dissipated along the wellbore and increases the amount of energy transferred to the formation.

The fishing head provides the ability to extract and install the vibrator without lifting the tubing string. The filter eliminates or significantly reduces the ingress of mechanical impurities in the well into the vibrator.

Sources of information:

1.Helpful guide to the design of the development and operation of oil fields. Oil production. Under the general editorship of Sh.K. Gimatudinova. M., Nedra, 1983, p. 365;

2. RF patent No. 2161237, MKI E21B 43 / 18,1999.

Claims (1)

A downhole hydraulic vibrator comprising a housing with lateral slotted slots, a barrel with an axial channel and lateral slotted slotted, mounted in the housing on bearings with the possibility of periodic overlapping of the slotted slot, and a reflector mounted below the barrel to release part of the working fluid in the radial direction, characterized in that the housing is equipped with a landing belt for installing a vibrator in the seat of the landing sleeve, included in the layout of the tubing string, fishing head minutes to extract it from the well and the filter inlet for the working fluid.