SU1227806A1 - Device for biasing of instruments in borehole - Google Patents

Description

The invention relates to devices for geophysical surveys of wells and can be used in the design of downhole pressure gauge devices.

The purpose of the invention is to improve the reliability of work in squalls with casing strings.

Fig. 1 shows a device for clamping devices in a basement, general view; in fig. 2 - clamping unit in the initial state, section; Fig, 3 - clamping unit in the working position, the section; in fig. 4 - diagrams of interaction of the clamping element with the working surface of the wedge; in fig. 5 - section A-A in FIG. 2.

In case 1 (Fig. 1), a pulse drive and a pressure assembly are installed in series from top to bottom.

Electromagnetic shock containing electromagnetic coils 2, firing pin 3 5 sleeve 4 with return spring 5, rings 6-8, head 3 and sleeve 4 are moved in the impactor and centrirostto rod 9 with head 10 is used as a pulse drive. Return spring 5 is interoperable with body 1 and the flange of the sleeve 4 and pressing the latter in the initial position to the ring 8.

The clamping assembly contains a wedge 11 with a stepped working surface, a guide link 12 (Fig. 2 and 3), a spring 13 5 elastic elements 14 and 1 pin 16, an inner and outer stitches 7 and 18 inserted one into another with the possibility of moving the outer sleeve 18 relative to the inner cup 17 along their common longitudinal axis. The wedge 11 is rigidly connected with the rod 9. The guide link 12 is pivotally attached at one end to the housing 1 from the inner side thereof. The second end is placed in the inner cup 17. The spring 1 is installed inside the guide link 12 between its bottom and the stud 16, which is rigidly attached to the inner cup 17 and placed in through-ffiie grooves 19 and 20, made in the outer cup 18 and directed link 12, respectively (Fig. 2 and 3). The control element 14 is embodied in the form of a flat spring mounted in the housing 1 with the possibility of creating a force on the outer node, directed at one hundred

five

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five

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five

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Ron pulse drive. The elastic element 15 is made in the form of a plate of prulsiny and placed between the glasses 17 and 18. At the end of the inner glass 17 is a bevel 21.

A longitudinal groove 22 is made in the wedge 11, into which the guide link 12 is placed (Fig. 5). The body 1, the head 3, the sleeve 4 and the rings 6-8 are made of a ferromagnetic material. The rod 9 is made of non-magnetic material.

The device works as follows.,

When applied to the windings of the control voltage coils 2 under the influence of an electromagnetic field,

3 performs reciprocating movement on the rod 9 and through the sleeve

4 transmits the force action of the wedge 11 (Fig. 1). The latter, moving along the housing 1, with its stepped working surface squeezes the inner cup 17 along the guide link 12 toward the borehole wall. When this bevel 21 (Fig. 4) helps the end of the inner glass

7 jump from step to step of the working surface of the wedge

1I.Paz 22 provides for free movement of the wedge 11 relative to the guide link 12 (Fig. 5). The second end of the inner Cup 17 through the elastic element 15 moves the outer Cup 18 in the same direction. The spring 13 is compressed between the pin 16 and the direction of the link

12. The movement of the inner and outer glasses 17 and 18 continues until the bottom of the outer glass 18 reaches the wall of the borehole or casing, and the end of the inner glass 17 does not take a position between two steps of the working surface of the wedge 11. Upon further exposure the pulse drive to the wedge 11, the latter, through the inner cup 17, compresses the elastic element 15 and the wedge 11 moves in the direction away from the pulse drive. The stud 16 moves in the groove 19 in the direction of the borehole wall. The end of the inner cup 17 is moved to the next step of the working surface of the wedge 11. The pressing of the device against the wall of the well or casing string is completed (Fig. 3). Drive off.

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during the operation of the impulse drive, the spring 5 ensures the return of the sleeve 4 to the initial position, the ferromagnetic rings 6–8 and the housing 1 ensure the closure of the magnetic flux of the electromagnetic coils 2.

To return the device to the initial state, a control voltage is applied to the windings of the coils 2, at which the firing pin 3 produces a force on the head 10 of the rod 9. The latter moves the wedge 11 upwards towards the pulse drive. When this elastic element 15 and the spring 13 return the inner and outer cups 17 and 18 to its original position (Fig. 2).

In case of failure of the impulse drive, the device is removed from the well as follows. Draw the logging cable. In this case, the housing 1 moves upwards, and the bottom of the outer cup 18 remains in place. the end

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the guide link 12, together with the inner cup 17, also remains in place, the second end of it, which is connected to the housing 1, moves upwards. Thus, the spacing element is installed at a certain angle relative to its position when the device is pressed against the borehole wall and compresses the elastic element 14.

The total lateral size of the device is reduced. Then the cable is lowered. The body 1 under the action of its own weight and the mass of the cable moves down and together with the elastic element 14 and the spring 13 returns the expansion element to its original position relative to the longitudinal axis of the body 1 and the wedge 11. In case, after this operation, the device

20 is not removed from the well, then several cycles of descent and ascent are performed, until the transverse size of the device is reduced to such an extent that it becomes possible to extract it from the well.

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FIG. year

yr

eleven

Editor L. Povhan

Thebes, 5

Compiled by N. Krivko Tehred L. Oleinik

Order 2273/35

Circulation 548 Subscription

VNIZh1I USSR State Committee

for inventions and discoveries 113035, Moscow,, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

Proofreader 0. Lugov

Claims (1)

(57 Device for pressing devices IN A WELL, comprising a housing and a pulse drive arranged sequentially from top to bottom and: a clamping unit made in the form of a wedge with a stepped working surface, a spacer element and a spring, a spacer element is installed with the possibility of interaction with one end face with a stepped working the surface of the wedge, and the other - with the wall of the well, characterized in that, in order to increase the reliability of work in wells with casing strings, it is equipped with two elastic elements and a guide link nom with a spring installed in it, and the spacer element is made in the form of two coaxially mounted cups with the possibility of moving one relative to the other along the longitudinal axis, and a pin rigidly connected to the inner cup, and through the grooves are made in the outer cup and the guide link hairpin, one end of the guide link is pivotally connected to the inner side of the body, and the other is placed in the inner glass with the possibility of interaction with it through the spring and the hairpin, one elastic element Execute v.vide diaphragm spring and is arranged between the glasses and the other is mounted in the housing for creating a force on the presser assembly directed towards the drive pulse.