SU1017787A1 - External pipe-catching device - Google Patents

Abstract

OUTDOOR PIPE, containing a body with a conical inner surface in the lower part, in the cavity of which an assembly is placed is released and in the form of a screw pair, a part rotating with respect to the body is connected by leads with gripping dies installed in the conical part of the body, characterized in that , in order to improve its operational reliability when extracting pipes of different diameters, the rotating part of the release assembly has radial grooves at its lower end, in which, with the possibility of radial movement anovleny upper end of the leash. (L vl H 00

Description

The invention relates to fishing tools, in particular, to external release tubings for eliminating accidents with pipes in wells.

A known trap containing a body with a conical inner surface in the lower part and through longitudinal 1: F4I durates in the middle part, a rod coaxially with the body and placed between the rod and the body spring-loaded with spring-loaded horizontal fingers interacting with the body slots and collet capture mi tl.

However, this trap is characterized by a complex structure and ensures the capture of pipes of only one diameter, and the gripping unit during the descent of the die into the well has the possibility of premature fixation of the collet in the released position.

Closest to the proposed technical essence and the achieved result is an outer pipe having a body with a conical inner surface at the bottom of the first part, in the cavity of which a release unit is placed in the form of a screw pair, the part of which is rotating with respect to the body gripping dies installed in the conical part of the housing 23.

The disadvantage of this fitter is that the pipes can be gripped with only one diameter and the gripping unit of the gripping unit is not reliable due to frequent feather breaks.

The purpose of the invention is to increase the operational reliability of the die when removing pipes of different diameters.

The goal is achieved by the fact that in the outer die plate, comprising a body with a conical inner surface in the lower part, in the cavity of which is placed the release unit in the form of a screw pair, the rotating part of which is connected with respect to the body, by leads with gripping dies installed in the conical part of the body, the rotating part of the release assembly at the lower end. has radial grooves in which the upper ends of the leads are mounted with the possibility of radial movement.

Figure 1 shows the trap, longitudinal section; figure 2 - section aa in figure 1;, fig.Z - section bb in figure 1; figure 4 - section bb In figure 1. .

The nozzle includes a housing, soy-. one of the lower 1 and upper 2 parts, the release unit in the form of a stop screw 3 and a clamp 4, forming a screw pair, and gripping dies 5. A stop screw 3 in the upper

the parts are provided with a stop piece b, and in the lower part there are grooves 7 in which the upper ends of the leads 8 are mounted with radial movement, the lower ends of which are rigidly connected to the dies 5 installed in the grooves 9 on the conical surface of the lower part 1 of the housing. The upper ends of the leads 8 are fixed nuts 10, providing retention gripping dies 5 and their synchronous movement relative to the body. The upper part 2 of the housing is made with longitudinal grooves 11 under the guiding protrusions 12 of the retainer 4 and connected to the sub 13. A pressure funnel 14 is installed at the lower end of the housing.

The tip works as follows.

When lowering the die into the well, the plates 5 under their own weight and under the weight of the stop screw 3 are in the lowest position. When the plates 5 rest against the upper end of the emergency pipes, the plates 5 move upwards together with the release unit. In this case, the plates 5, together with the leads 8, make not only axial, but also horizontal movement. Dies 5 are moved along grooves 9, and the leads along slot 7. This prevents the drivers 8 from bending when pipes of different diameters are removed. When moving the pick-up unit, the emergency column passes inside the pipe up to. the stop at the lower end of the stop screw 3. When lifting the drill pipes on which the die falls down, the housing is raised and the rams 5, remaining in place, catch the emergency pipes beyond the outer surface and remove them together or in parts by unscrewing under axial load 2 -3 t

If it is impossible to remove the pipes for any reason, the die will be released from the stuck column. For this, the drill pipes together with the trumpet are sharply lowered down, as a result of which the dies 5 come out of engagement with the emergency code, and the leads 8 from the grooves of the stop screw 3. After that, the streamer starts to rotate, resulting in the stop screw 3 with the leads 8j held nuts 10 installed in the annular groove is moved upwards relative to the body and fixes the cloaks 5 in the extreme upper position, which corresponds to the position of release of the pipe from the emergency column. Then the pipewalk is raised to the surface.

The application of the proposed tubolov provides an increase in several sizes of pipes.

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Claims (1)

OUTDOOR TUBING, comprising a housing with a conical inner surface in the lower part, in the strip of which there is a release assembly in the form of a screw pair, a part of which rotates relative to the housing and is connected by leashes with gripping dies installed in the conical part of the housing, characterized in that , in order to increase its operational reliability when removing pipes of different diameters, the rotating part of the release unit at the lower end has radial grooves in which We are the top condas of leashes. . aL 4_ "I fill 1