SU746084A1 - Core head for expanding seals at repairs of well casing - Google Patents

Description

(54) DROWSING HEAD FOR THE ADJUSTMENT OF PLASTERS WHEN REPAIRING CASSES COLUMNS

one

The invention relates to devices for repairing casing strings of water, oil and gas wells in order to restore tightness or strengthen the walls of the column using a longitudinally corrugated metal pipe.

The known Dorniruyushaya head for pressing out plasters during the repair of casing strings contains a rigid cone punch, an elastic sector head and a mechanism for switching the head from the transport position to the working state fl) -. :

The disadvantage of this dorning head is the impossibility of providing high-quality repressing of the patches in the pipe being repaired, which has deviations in the shape and size of the cross section.

The closest known rengenium is the dorniruy head for the decompression of plasters during the repair of casing strings, including a rod on which a rigid conical punch, a sector head and a head switching unit are placed from the transport position to the working position 2.

The disadvantage of this dorning head is that it does not ensure reliable operation in pipes of different diameters.

The purpose of the present invention is to ensure the reliability of the dorning head in pipes of different diameters.

This goal is achieved by the fact that it is equipped with movable expansion sectors mounted on a rigid cone punch and spring-loaded cone sliders mounted on a rod, the upper ends of the ceKtopoB sector head being articulated with a tight cone punch, and the lower ones are installed with an opportunity to interact with sliders. . :

FIG. 1 shows a dornier go-. agile in the transport position; in fig. 2 section A-A of FIG. I; in fig. 3 is a section b-b of FIG. one; in fig. 4 - cross section bb of fig. I; 20 in FIG. 5 - Dorniruyushch head in the working position.

Claims (2)

The dorner head consists of a bar 1, on which a rigid conical punch 2, a sector head 3 and a transfer unit 1 are installed (moving the head from the transport position to the working one, including the spacer bushing 4 and the spring 5. The conical punch 2 is mounted on the rod 1 so that it can move along the latter between the supporting cone 6 and the spacer sleeve 4. On the rigid conical punch 2, there are movable extension sectors 7, equipped with adjusting screws 8. ...... On the rod 1 there are mounted conical sliders 9, spring-loaded e packages of disc springs 10. The upper ends of the sectors 11 sector heads 3 are pivotally connected to a rigid conical punch 2, and the lower ones are installed with the possibility of interaction with the sliders 9. In the transport position of the device plaster (longitudinally corrugated pipe) 12 rests on the support cone 6. - The dorning head works as follows: With the help of the rod 1, the dornier head is attached to the power section of the device (not shown), while the adhesive 12 rests on the support cone 6, and the spring 5 holds the dornier olovku in the transport position. After the device is lowered to a predetermined depth and the force mechanism is turned on, the end of the patch 12, extended by the supporting cone 6, abuts the rigid conical punch 2 and, overcoming the resistance of the spring 5, moves the punch 2 up to the stop in the sleeve 4, as a result of which sector 1 7 moves apart to the specified size and the sectors I1 of the sector head 3 are rotated at a certain angle, resting on the beveled surfaces of the respective spring-loaded sliders 9, and the height of the distance sleeve 4 is chosen so that the overall diameter The meter on the formative surface of the sectors of the II sector head 3 increased to a greater extent than that of sectors 7 and exceeded the inner diameter of the patch 12 of the DorKyrov floor. Upon further pulling of the dornier head, the patch gradually expands with punch 2. sectors 7 and, finally, sectors II of sector head 3, which resiliently press plaster 12 to the walls of the casing being repaired with a given reinforcement, providing necessary tightness, which is also facilitated by the sealant, which usually cover outside the surface of the patch plaster 12 before lowering it into the well. Before lowering the device into the well, depending on the specific conditions (wall thickness of the pipe being repaired, thickness of the wall of the installed patch), adjust: ... a) the overall diameter of the sectors 7 with the help of adjustment screws 8; b) the magnitude of the pacing of the sectors 11 sector head 3 by installing the spacer 4 of the appropriate height; c) the magnitude of the radial forces generated by the sectors 11 of the sector head 3 (corresponding to the tightening of the pack of the sprung springs 10. Dorniruo (the head allows you to install a patch in casing with any casing wall thickness. elements depending on the required degree of deformation, the material of the type of plaster wall, and the magnitude of the radial stroke of the elastic elements, taking into account the overlap of possible deviations of the internal a repair pipe within the manufacturing tolerance. Claims Dorning head for decompression of patches for repairing casing strings, including a rod on which a rigid conical punch, a sector head and a head switching unit from the transport position to the working position, are defined,. in order to ensure the reliability of the dorning head in pipes of different diameters, it is equipped with movable expansion sectors mounted on a rigid cone punch and loaded The slider mounted on the rod, the upper ends of the sector sectors are articulated with a rigid conical punch, and the lower ones are installed with the possibility of interaction with the sliders. Sources of information taken into account in the examination. one-. US patent No. 3162245, cl. 166-63, published. 1964. 2. US patent No. 3179168, cl. 166-14, published. 1965 (prototype). 2 FIG. AT 8 Fig