RU2671242C1 - Hydraulic vibrator - Google Patents

Abstract

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil and gas industry and can be used to intensify oil extraction or water injection. Hydraulic vibrator contains a body with hard-mounted barrel with a bottom hole and a spool, fitted with ball bearings on the barrel. Spool and barrel are made with slotted recesses arranged at an angle to their generatrix. Slots of the spool are located in the opposite direction to the slotted recesses of the trunk. On the inner wall of the body opposite to spool made the same longitudinal recesses with two inclined walls connected at the bottom of the recess, while in each recess one of the inclined walls is perpendicular to the slit slot of the spool when an open space of slit slot of the spool is located opposite this wall.

EFFECT: increase in flow of oil to the well is provided.

1 cl, 3 dwg

Description

The invention relates to the oil and gas industry and can be used to intensify the selection of oil or water injection.

Known borehole hydraulic vibrator [1], comprising a housing and a barrel installed in the housing with a central axial channel made in the form of an expanding diffuser nozzle and slotted slots, with a spool coaxially installed with slotted slots made at an angle to the generatrix, but in the opposite direction the direction of the slotted slots of the barrel, and the bottom case is muffled and with radial holes for the output of the working fluid into the annulus, while opposite the radial holes flax reflector. A disadvantage of the known vibrator is the design complexity due to a significant number of parts.

Closest to the claimed one is a hydraulic vibrator [2], comprising a housing with a fixed barrel with a bottom hole, and a spool seated with ball bearings on the barrel, while the spool and barrel are made with slotted slots located at an angle to their generatrix, with slotted slots of the spool are located in the opposite direction to the slotted slots of the barrel. In the prototype, the frequency of hydraulic pulses that occur during the operation of the vibrator is negligible.

The objective of the invention is to increase the frequency of hydraulic pulses that occur during operation of the vibrator.

The problem is solved in that in a hydraulic vibrator comprising a housing with a fixed barrel with a bottom hole, and a spool planted with ball bearings on the barrel, while the spool and barrel are made with slotted slots located at an angle to their generatrix, and slotted slots the spool are located in the opposite direction to the slotted grooves of the barrel, new is that on the inner wall of the housing opposite the spool are made the same longitudinal recesses with two inclined walls, with unified at the bottom of the recess, while in each recess one of the inclined walls is made perpendicular to the slotted slot of the spool with the open space of the slotted slot of the spool opposite this wall.

In FIG. 1 shows a hydraulic vibrator in section, slotted slots are shown conditionally; in FIG. 2 is a view A of FIG. 3; in FIG. 3-section aa of FIG. one.

The hydraulic vibrator comprises a housing 1, with a fixed barrel 2 with a bottom hole 3, and a spool 4, mounted by ball bearings 5 on the barrel 2. Moreover, the spool 4 and the barrel 2 are made with slotted slots 6 located at an angle to their generatrix. Slotted slots 6 of the spool 4 are located in the opposite direction to the slotted slots 6 of the barrel 2. On the inner wall 7 of the housing 1 opposite the spool there are identical longitudinal recesses 8 with two inclined walls 9 and 10 connected at the bottom of the recess. Moreover, in each recess 8, one of the inclined walls 10 is made perpendicular to the slotted slot 6 of the spool 4 with the open space 11 of the slotted slot of the spool opposite this wall 10.

The principle of operation of the hydraulic vibrator is as follows. Fluid is pumped into the internal cavity of the barrel through a tubing string and sub 12. It first flows through the slotted slots 6 of the barrel 2 and enters the slotted slots 6 of the spool 1. The fluid flow, flowing through the slotted slots 6 of the spool 1, hits the perpendicular walls 10 of the recesses 8 and rotates the spool clockwise (Fig. 2 and 3 ) When the spool rotates, its slotted slots 6 are periodically aligned with the slotted slots 6 of the barrel 2 and periodically closed by the outer wall 13 of the barrel. As a result of such rotation of the spool, the liquid flowing from the slotted slots 6 of the spool creates hydraulic pulses with a frequency depending on the pressure of the liquid.

During the operation of the proposed hydraulic vibrator, due to the execution of longitudinal recesses on the housing with walls perpendicular to the slotted slots, the spool rotates at a higher speed than the prototype spool. In the prototype, the inner wall of the casing is smooth and the fluid flow, swirling, moves down between the casing and the spool. The effect of such a flow for spool rotation is negligible. In the proposed vibrator, the fluid flow first hits the wall of the recess and further rotates the spool with considerable force. Therefore, the rotation speed of the spool of the proposed vibrator is greater than the rotation speed of the spool of the prototype. With increasing spool rotation speed, the frequency of hydraulic pulses increases. Due to this, when processing the wells with the proposed vibrator, the influx of oil from the reservoirs increases.

List of information used

1. patent RU No. 2161237, IPC Е21В 28/00, ЕВВ 43/25, publ. 12/27/2000;

2. Reference guide for the design, development and operation of oil fields. Oil production. Under the general editorship of Sh.K. Gimatudinova. M, Nedra, 1983, p. 365.

Claims (1)

A hydraulic vibrator comprising a housing with a fixed barrel with a bottom hole and a spool mounted with ball bearings on the barrel, while the spool and barrel are made with slotted slots located at an angle to their generatrix, with slotted slots of the slide valve located in the opposite direction to the slotted slot of the barrel , characterized in that on the inner wall of the housing opposite the spool are made the same longitudinal recesses with two inclined walls connected at the bottom of the recess, while in In each recess, one of the inclined walls is perpendicular to the slotted slot of the slide valve with the open space of the slotted slot of the slide valve opposite this wall.

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