RU2651676C1 - Mechanical gauge - Google Patents

Abstract

FIELD: oil and gas industry.

SUBSTANCE: mechanical gauge includes a housing with the upper and lower connecting couplings and calibrating elements with stops positioned on its outer surface for axial movement. The housing below the upper coupling is provided with a cone expanding upwards, and above the lower coupling there is thread, on which the adjusting nut is placed. Outside the housing there is a sleeve with ports opposite to the cone pressed upwards from the adjusting nut by the spring. The calibrating elements are made in the form of ring segments rigidly connected to the stops and inserted into the ports of the sleeve for movement inside due to the stops and interaction with the cone from the inside. The ports of the sleeve are uniformly distributed around the perimeter. The ports of the sleeve are uniformly distributed around the perimeter.

EFFECT: proposed design of the mechanical gauge is light and advanced, it enables to run on a rope or cable and automatically exclude clamping without heavy loads.

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Description

The proposal relates to the oil and gas industry, namely to measuring the internal diameter of the well.

It is known "Device for measuring changes in the inner diameter of the casing strings" (patent RU No. 2101488, ЕВВ 47/08, published January 10, 1998), including ground equipment, a communication cable and a downhole tool, comprising a housing with a head for connecting a communication cable, measuring arms with nodes for the implementation of their disclosure and pressing to the inner surface of the studied casing string, the angle of the measuring levers into an electrical signal with an electronic unit for transmitting information to ground equipment, and on the borehole body about the device in its different sections, identical rings are additionally installed without the possibility of rotation, equipped with the same wire stops, evenly distributed on the outer surface of these rings tangentially to them at an angle of 90 ° to their radii and in contact with the inner surface of the casing in opposite directions due to a flip one of the rings 180 °.

The disadvantages of this device are the high cost and low reliability, since a large number of complex and small mechanical and electrical parts are used.

The well-known "Template" (patent PM RU No. 86658, ЕВВ 47/08, published September 10, 2009) containing a hollow body with connecting threads and calibrating elements placed on it, made in the form of bushings with an axial cut, and end clamps from axial movement, moreover, the bushings are installed between the latches with the possibility of interaction and joint rotation, and the longitudinal grooves of the bushings are aligned with each other.

The disadvantage of this design template is the large metal consumption and time-consuming during tripping operations, as flushing is necessary, and this is connected with the descent on the pipe string, if the template gets stuck (the template is grabbed in the irregularities of the measured pipe string), it is necessary to use great efforts, including the use of iass.

The closest is the "Template for pipes" (patent RU No. 2114303, E21B 47/08, published 06/27/1998), comprising a housing with connecting couplings and calibrating elements placed on its outer surface with stops fixed from axial movement, and the stops are displaced alone relative to the other by an amount exceeding the height of the calibrating elements installed between the stops with the possibility of axial movement and interaction with the ends of the stops, while connecting couplings are used as end stops.

The disadvantages of this template are the high metal consumption due to the increased longitudinal dimensions and high time costs during tripping operations, since descent on the pipe string is necessary, while with the template grips it is necessary to use the structure itself as a jar with shock loads.

The technical task of the proposed design of the mechanical template is to create a lightweight and technological template, lowered on a rope or cable and freed from tacking automatically without heavy loads.

The technical problem is solved by a mechanical template, comprising a housing with upper and lower connecting couplings and calibrating elements with stops located on its outer surface with the possibility of axial movement.

What is new is that the case below the upper sleeve is equipped with a cone expanding upwards, and above the lower sleeve - with a thread on which the adjusting nut is placed, a glass with windows opposite the cone is installed outside the case, pressed up by the spring from the adjusting nut, while the calibration elements are made in in the form of ring segments, rigidly connected to the stops and inserted into the glass of the glass with the ability to move inward thanks to the stops and interaction from the inside with the cone, and the glass of the glass is evenly distributed around the perimeter.

The drawing shows a diagram of the template. Structural elements that do not affect the performance of the template are not shown.

The mechanical template includes a housing 1 with upper 2 and lower 3 connecting couplings and calibrating elements 4 with stops 5 located on its outer surface with the possibility of axial movement. The housing 1 is provided below the upper coupling 2 with a cone 6 expanding upwards and above the lower coupling 3 with a thread 7, on which the adjusting nut is located 8. Outside the housing 1, a cup 9 with windows 10 is installed opposite the cone 6, preloaded by the spring 11 from the adjusting nut 8 up. The calibrating elements 4 are made in the form of ring segments, are rigidly connected to the stops 5 and inserted into the windows 10 of the glass 9 with the ability to move inward thanks to the stops 5. The calibrating elements 4 are also made with the possibility of interaction from the inside with the cone 6. Moreover, the windows 10 of the glass 9 are evenly distributed over its perimeter.

The template is assembled in a workshop. The upper connecting sleeve 2 is first screwed to the housing 1. Calibrating elements 4 are selected to measure the desired internal diameter of the well (not shown). In the windows 10 of the glass 9, gauge elements 4 are inserted from the inside to the stops 5, and the glass 9 is put on the bottom 1 upwards on the housing 1 until the upper ends of the gauge elements 4 interact with the coupling 2. In this case, the cone 6 presses the stops 5 of the gauge elements 4 from the inside of the glass 9. The glass 9 is pressed from below by the spring 11 with the help of an adjusting nut 8, which is moved by rotation along the thread 7. The pressing force of the spring 11 is determined empirically so that the glass 9 is always in relation to the housing 1 as high as possible before interacting with zheniem well. The field of which is attached to the housing 1 the lower connecting sleeve 3.

Before lowering the template into the well, the technological load (for example, a cylindrical blank, one or two pipes or the like - not shown) is screwed to the upper 2 connecting sleeve, which is smaller in diameter than the diameter of the calibrating elements 4. To the upper part of this assembly attach a technological head (not shown) for connection with a cable, a rope or when descending into horizontal boreholes with pipes (not shown), on which the template is lowered into the well. The length of the cable, rope or pipes during descent is controlled by measuring equipment (not shown).

If during the descent into the well the template encounters a narrowing, then the gauge elements 4, falling into this zone, begin to jam and stop. The depth of this narrowing is fixed with measuring equipment. After that, the cable, rope or pipes begin to be pulled upward by wellhead equipment (not shown), while the calibrating elements 4 stuck in the narrowing of the well and the glass 9 remain in place, while the housing 1 with the cone 6, couplings 2 and 3 and the nut 8 are moved in the direction of the wellhead, compressing the spring 11. The cone 6 is pulled from the calibrating elements 4, being located opposite them with a smaller diameter. As a result, under the action of an external reaction from the narrowing of the well, the gauge elements 4 go through the windows 10 into the glass 9, being released from jamming in the narrowing. In this case, the cup under the action of the spring 11 moves the cup 9 with gauge elements 4 up the casing 1, finally removing the template from the narrowing without large and shock loads. After which the template with intact gauge elements 4 is removed from the well.

Since it does not take much effort to extract the template, it can be made lightweight and small in size and use cable-container technology to work.

The proposed design of the mechanical template is lightweight and technologically advanced, it allows you to lower it on a rope or cable and free itself from tacking automatically without heavy loads.

Claims (1)

A mechanical template, comprising a housing with upper and lower connecting couplings and calibrating elements with stops located on its outer surface with the possibility of axial movement, characterized in that the housing below the upper coupling is equipped with a cone expanding upwards and above the lower coupling with a thread on which is placed an adjusting nut, a glass with windows opposite the cone is installed outside the case, pressed up by the spring from the adjusting nut, while the calibrating elements are made in the form of ring segments, connected ECTS with stops and inserted in the glass of the window to be moved inside due to stops and interaction inside the cone, and the glass of the window are evenly distributed around the perimeter.

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