SU1036909A1 - Well bottom flaw regulator - Google Patents

Abstract

CONVECTIONAL FLOW REGULATOR, comprising a housing with a radial channel, a spring-loaded core f with a conical protrusion and a radial channel, forming with the housing an annular cavity in which the mouth; A spring-loaded separator with daosseriruknimi nozzles and eubcha.to-slotted rotary mechanism, characterized in that, in order to increase reliability in operation due to uniform distribution of the load on the core, pos. The latter has additional conical protrusions evenly spaced around the circumference with radial channels, and the casing is made with additional channels coaxial with the canalCat the protrusions of the core, while the rotary mechanism has a double-sided bevel, (L

Description

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The invention relates to the oil and gas industry and can be used in devices for controlling the flow rate of a product at the bottom of a well during sampling or injection.

A known flow regulator includes a housing with throttling openings for the passage of the product during injection of Cl}.

The drawback of the device is the presence in the device design of rubber elements, small gaps and deaf cavities between the mating moving parts, which does not provide the required reliability of the device in aggressive and high-temperature environments and containing a large percentage of mechanical impurities.

Also known downhole flow regulator, comprising a housing with a radial channel, a spring-loaded core with a conical protrusion and a radial channel, forming an annular cavity with the housing, in which a spring-loaded separator is installed with throttling nozzles and a gear-slotted rotary mechanism C2

A disadvantage of the known downhole fitting is the presence of one conic protrusion on the core, which, when the nozzle is pressed against the saddle of the hole. the case contributes to the distortion of the core. As a result, the centering of the core in the case is not ensured with sufficient accuracy and, last but not least, does not always guarantee a reliable change of the throttling nozzle when creating an axial load on the core.

In addition, the presence of a single radial channel in the housing does not exclude the possibility of disruption of the normal operation of the device in the borehole when the body opening is closed by the casing when the device is pressed against the borehole in this case the product passes through the radial channel in the forward and reverse directions x is difficult. In addition, the teeth of the turning mechanism are made with one-sided bevel, which leads to jamming of the mechanism. creating axial load.

 The aim of the invention is to increase operational reliability by uniformly distributing the load on the core.

The goal is achieved by the fact that the core has additional conic protrusions evenly spaced around the circumference with radial channels, and the casing is made with additional channels that are aligned with the projections of the core.

at the same time the teeth of the turning mechanism have a double-sided bevel.

/ Fig, 1 shows downhole regulator, flow; in fig. 2 is a cross section of A-Ana of FIG. 1 j in fig.Z section bb in fig. 1, in FIG. 4 is a cross-sectional view BB in FIG. one ; in fig. 5 - toothed-spline gearing device in the scan.

. The downhole flow regulator includes a housing 1c with equidistant circumferential apertures 2 for communicating the internal space with the outside, and a core 3 with conical protrusions 4. Between the housing 1 core 3 there is a separator 5, in the slots of which are installed throttling nozzles b and centering balls 7. Core 3 and the separator 5 are pressed against the springs 8 and 9. In the upper part of the core 3 there is a spline crown 10 which engages with the counter slots 11 of the housing 1. The separator 5 at the end has a tooth 12 with double-sided catfish, which engage with similar teeth 13 and 14 located at the ends of the slots of the heart.

3 and housing 1. The core 3 is equipped with a replaceable seat 15 for supporting the pusher when changing the throttling nozzle.

The device works as follows.

The flow regulator according to the technological scheme of withdrawing or pumping the product is installed in the well, which is part of the production tubing. The flow rate of the product entering the well is controlled by nozzles 6, filled with holes and without holes. Nozzle change b is carried out in a percussive manner using a pusher (not shown), which is lowered into the well on a wire. Under the action of the impact of the pusher on the saddle 15, the core 3 moves down to the stop in the housing 1, turning the separator 5 through an angle, corresponding to the half of the sound

The distances between adjacent teeth of the separator 5. When the shock (axial) load is removed, the core 3 and the separator 5 under the action of the springs 8 and 9 are moved to the uppermost position. As a result, other nozzles b are installed against the openings 2 in the housing 1, the flow rate of the product passing through the device changes accordingly.

The use of the proposed downhole flow control valve provides an opportunity to regulate the withdrawal or injection of a product while simultaneously and separately operating several formations along a uniform elevator and to conduct hydrodynamic studies in the well during operation.

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Claims (1)

(57> BOTTOM FLOW REGULATOR, comprising a housing with a radial channel, a spring-loaded core fc with a conical protrusion and a radial channel, forming an annular cavity with a housing in which a spring-loaded separator with throttling nozzles and an eubcha is installed. This is a ~ slotted rotary mechanism Most importantly, in order to increase the reliability in work due to the uniform distribution of the load on the core, the settlement of Ledny has additional conical protrusions uniformly located around the circumference with radial channels, and the corps is made with additional. body channels, coaxial with the channels of the protrusions of the core, while the teeth of the rotary mechanism have a two-sided bevel.