RU86658U1 - AXIAL CUT TEMPLATE - Google Patents

Abstract

A template containing a hollow body with connecting threads and calibrating elements placed on it, made in the form of bushings with an axial section, and end clamps from axial movement, characterized in that the bushings are installed between the clamps with the possibility of interaction and joint rotation, and the longitudinal grooves of the bushings are aligned between themselves.

Description

The proposal relates to the study of boreholes, namely the measurement of internal diameter.

The well-known "Template for pipes" (AS No. 1086142, E21B 47/08, publ. Bull. No. 14 of 04/15/1984), comprising a housing with couplings and installed between them measuring elements of elastic material, measuring elements are made in the form of plate rings with axial holes located on the same radius, and radial slots connecting the outer surface of the rings with axial holes.

The disadvantages of this device are:

- the inability to use the template with simultaneous flushing, since such a design of the template is possible only when installing measuring elements with a gap, which play a role in flushing the well of labyrinth seals;

- the impossibility of accurately determining violations in the well, since measuring elements made of an elastic material with longitudinal slots do not accurately determine the violations and impassable sections of the well.

Also known is the "Template" (patent RU No. 2114303, ЕВВ 47/08, publ. 06/27/1998), comprising a housing with connecting couplings and calibrating elements placed on its outer surface with stops fixed from axial movement, while the stops are displaced one relative to the other by an amount exceeding the height of the gauge elements installed between the stops with the possibility of axial movement and interaction with the ends of the stops, with connecting couplings used as end stops.

The disadvantages of this device are:

- the impossibility of using the template with simultaneous flushing, since the measuring elements installed with a gap play a role in flushing the well of labyrinth seals;

- the complexity and high cost of construction.

The closest in technical essence and the achieved result is the "Template" (patent RU No. 2114302, ЕВВ 47/08, publ. 06/27/1998), containing a housing with connecting couplings and placed on it calibrating elements and stops with clamps from axial movement moreover, it is equipped with fixed on the body between the stops, guide keys for calibrating elements, made with mating grooves on the inner surface and installed with the possibility of axial movement to contact with the stops, and the calibrating elements are made in the form of bushings with longitudinal grooves and protrusions on the outer surface, and the protrusions of one sleeve are offset in plan relative to other bushings with the overlapping column barrel around the entire circumference.

The disadvantages of this device are:

- the impossibility of using the template with simultaneous flushing, since the measuring elements installed with a gap play a role in flushing the labyrinth seal wells, and the longitudinal grooves overlap each other;

complexity and high cost of construction.

The closest in technical essence and the achieved result is the "Template" (patent RU No. 72270, ЕВВ 47/08 registered April 10, 2008), contains a hollow body with connecting threads and calibrating elements placed on it, made in the form of bushings with longitudinal grooves and end stops against axial movement. The bushings are installed between the latches with the possibility of interaction and joint rotation .. The longitudinal grooves of the bushings are aligned with each other.

The technical task of the proposed device is to simplify and reduce the cost of the design, made with the possibility of descent into the well with flushing.

The technical problem is solved by a template containing a hollow body with connecting threads and calibrating elements placed on it, made in the form of bushings with axial grooves, and end clamps from axial movement.

New is that the bushings are installed between the clamps with the possibility of interaction and joint rotation, and the longitudinal grooves of the bushings are aligned with each other.

The drawing shows a template with an axial section.

The template contains a hollow body 1 with connecting threads 2 and 3 and calibrating elements 4 placed on it, made in the form of bushings with axial grooves 5, and end clamps 6 and 7 from axial movement. The bushings 4 are installed between the latches 6 and 7 with the possibility of interaction and joint rotation, for example, using pins 8 of one bushings 4 inserted into the grooves 9 of the other bushings 4. The longitudinal grooves 5 of the bushings 4 are aligned with each other.

The device operates as follows.

The housing 1 with the help of threads 2 and 3 is connected to the downhole equipment (not shown in the diagram) and on the pipe string (not shown in the diagram) is lowered into the well (not shown in the diagram) by measuring its internal passage diameter with calibrating elements 4. If flushing is necessary (contaminated area, sand plug, etc.), liquid is pumped through the pipe string, which, passing through the downhole equipment and inside the hollow body 1, spills out from the outside, passing through the axial grooves of 5 bushings 4. Since the bushings 4 located between the stops 6 and 7, installed due to the interaction of the pins 8 and the grooves 9 with the possibility of only joint rotation relative to the housing 1, the longitudinal grooves 5 of the bushings 4 cannot be displaced relative to each other and increase the hydrodynamic resistance to the flow liquid.

In cases of possible jamming of the template, a shock jar (not shown in the drawing) is included in the composition of the downhole equipment, which helps to pass such tackings.

After completion of the work, the template is removed from the well and an audit is carried out. Extreme wear most often affects the extreme upper and lower bushings 4, which, if necessary, change with the middle ones. That allows you to extend the performance of the template without additional material costs.

The proposed design is simple, cheap and reliable in operation, while allowing for the template with simultaneous flushing of the wellbore.

Claims (1)

A template containing a hollow body with connecting threads and calibrating elements placed on it, made in the form of bushings with an axial section, and end clamps from axial movement, characterized in that the bushings are installed between the clamps with the possibility of interaction and joint rotation, and the longitudinal grooves of the bushings are aligned between themselves.