SU1384735A1 - Apparatus for articulated jointing of deep-well instruments - Google Patents

Abstract

The invention relates to geophysical research and m. used in complex downhole tools. The purpose of the invention is to increase reliability in operation. The device contains the lower 5 and upper 3 tips (H). The trunnion (C) 4 is rigidly connected with H 5, with respect to which is spring loaded by the spring 10, the sleeve 9, is placed

Description

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at C 4 and entering with its ends into holes made in H 5 and sleeve 7. The latter is rigidly connected to H3 having a spherical bore for a spherical head C 4 that is fixed relative to H 3 by a spherical response surface of the sleeve 7. In the central hole C 4 has a tube 11 of non-circular cross-section, which forms a profile connection

with a hole H 3 and a non-circular head enters the response slot H 5. The presence of a hinge connection between H 3 and H 5, formed by the head C 4 and one of H and the sleeve 9 capable of moving along the surface C 4 under the action of environmental pressure, makes device for connecting movable only at a certain depth. 3 il.

one

The invention relates to geophysical surveys of squash and can be used in complex downhole tools.

The purpose of the invention is the improvement of reliability in operation.

FIG. 1 shows a device for the articulation of downhole tools, the section in FIG. 2 shows section A-A in FIG. one; FIG. 3 a section BB in FIG. one..

The guard housing 1 of the upper geophysical instrument and the housing 2 of the lower instrument are connected by means of an upper tip 3 having a hemispherical bore that includes a spherical head of a connecting pin 4 with a central opening with a cylindrical outer surface and a shoulder resting against the end of the lower tip 5. The pin 4 is fixed relative to the lower tip 5 by a nut 6. The spherical head of the pin 4 is fixed to the tip 3 by means of a sleeve 7 with a matching spherical boring and a nut 8. On the outer cylinder The bore 9 is inserted into the cylindrical bore of the sleeve 7 and into the return cylindrical bore of the tip 5, in which the spring 10 is installed. In the central hole of the connecting pin 4 includes a tube 11 with a bottom head in the form of a square placed in the tip nest 5, has a corresponding configuration, and an outer surface of square section, which enters the square opening of tip 3. To ensure the relative mobility of the tube 1 1 and tips 3 and 5 in the formed profile soy There are gaps. The axial fixation of the tube 11 is made with the help of the ring 12. The fixed and movable joints are sealed by the rings 13-17. The cavity B is in communication with the environment through the opening D in the sleeve 9.

The device for swiveling downhole tools operates as follows.

On the surface, before the complex of geophysical instruments is lowered into the well, the parts are in the initial state (Fig. 1). The upper security body 1 and the lower body 2 are fixed relative to each other, since the sleeve 9 enters the opening of the sleeve 7 rigidly connected to the upper tip 3 by means of the nut 8.

When the complex of geophysical instruments is lowered into the well, the sleeve 9 begins to exert a force acting on the environmental pressure on its bearing area equal to the area of the ring with the outer diameter corresponding to the diameter of the cylindrical bore of the lower tip 5 and with the inner diameter coinciding with the diameter of the cylindrical part of the trunnion 4. At a certain depth, this force overcomes the resistance of the spring 10 and the sleeve 9 completely extends from the opening of the sleeve 7, which leads to the elimination of the rigid connection of the tips 3 and 5 and devices with them, as well as to the possibility of their relative movement at a certain solid angle. Rotation

tips 3 and 5 relative to each other is impossible, since the profile connections of tube 11 with tips 3 and 5 prevent this.

The presence of a hinge connection between the tips of the connected devices, a spherical coupling head, a pin 4 and one of the tips and a spring-loaded sleeve 9, capable of moving along the cylindrical surface of the connecting pin 4 under the action of environmental pressure, makes the device for the hinged connection of borehole geophysical instruments only movable at a certain depth. The consequence of this structural design of the device is an increase in the reliability of the docking of several downhole geophysical instruments that form the complex, and an improvement in the permeability of the complex when it is lowered into open wells, since at small depths the cavernosity and seals are most often manifested. The permeability of the complex is higher, the longer the length of the protective covers that are rigidly connected to each other.

and

2

Claims (1)

Invention Formula A device for swiveling downhole tools, comprising upper and upper tips, characterized in that, in order to increase reliability in operation, it is provided with a trunnion, with a spherical head and a central bore, sleeve, sleeve and tube of non-circular cross-section with a non-circular head, and rigidly connected to the lower tip, the sleeve is spring-loaded relative to this tip, placed on the trunnion and enters with its ends into the holes made by the lower tip and the sleeve rigidly connected to the upper tip chnikom having a spherical bore for the spherical head of the stud, which is fixed relative to the upper tip mating spherical surface of the liner, the non-circular section tube is installed in the central trunnion bore forms a compound with the profile of the upper nozzle hole and the head includes a non-circular socket in the response of the lower tip. B-e Fig .:}