SU1684480A1 - External tube catching unit - Google Patents

Abstract

The invention relates to mining promet. The goal is to increase the load capacity of the outer ear. For this purpose, a guide tube with a conical outer surface is installed in the housing. The inner surface of the housing has a portion of the conical surface, which responds to the conical surface of the guide nozzle. The nozzle has locking elements, the upper portions of which are made inclined and are located on the conical surface of the housing and the conical surface of the guide nozzle. The angle of inclination of the upper portions of the fixing elements is equal to the angle of inclination of the conical surfaces of the housing and the guide nozzle. Inclined sections are made on the inner surface of the housing under the windows. The gripping portions of the locking elements are made with inclined surfaces, corresponding to the inclined portions of the body, and are placed on the latter. The unscrewing of the pipes is carried out by transmitting the rotation of the drill string through the subs and the body. Dies located in the hull windows perceive tangential forces from the hull and transfer them to the pipe. Unscrewing the pipe and lifting it to the surface. A sharp force is applied downward to release the trap from the wounded emergency column. 3 il. sl С о 00 4 -N 00 о

Description

The invention relates to the mining industry, namely to the fishing tool used in drilling oil and gas wells,

The aim of the invention is to increase the load capacity of the outer ear.

Figure 1 shows the trap, a general view; 2 is a section A-A in FIG. one; on fig.Z - section bb in fig. one,

The outer trubolovka includes a housing 1 with windows under the gripping portions of the fixing elements in the form of dies 2, made with notches in the gripping portions. In the upper part, the outer part of the dies is inclined, interacting with the inner conical surface of the housing 1, and the inner part is made in the form of a flat inclined surface that interacts with the return conical outer surface of the guide

pipe 3, which is provided from above with a flange 13 for rigid fixation between the ends of the housing 1 and the sub 7. The dies are spring-loaded relative to the body in the axial direction by means of the sleeve 4 and the spring 5. Inside the guide pipe 3 is placed with the possibility of axial movement the flushing pipe 9 fitted with a piston 10, with a funnel 11 and a packer 12. Subs 6-8 are screwed on top of the case.

The dies in FIG. 1 are shown in their highest position. On the inner surface of the housing, under the windows, there are inclined sections, and the gripping sections of the fixing elements are made with inclined surfaces, corresponding to inclined sections of the CCRP, and placed on the latter.

To remove the drill pipes left in the hole, the tubing is connected to the string of the descending tubing using the sub 8. After descending, the end of the emergency column is inserted into a trumpet. The upper end of the pipe abuts the plates 2, which are in the lower position under the action of the spring 5. The plates are raised, while the upper conical part of the plates slides over the mating conical surfaces of the housing and the guide nozzle 3, which is fixed from moving in the axial direction between the housing 1 and the sub 7 using a flange 13, which ensures parallel movement of the dies. The diameter of the bore hole increases and the tube passes into the interior of the die. Dies 2 cover catchable pipe. The flushing pipe 9 is lowered and the packer 12 enters the internal channel of the pipe being caught, which allows flushing the well through the lower end of the emergency string. In this case, the pressure of the circulating fluid is transmitted to the piston 10, which leads to the sealing of the pack 12 in the internal channel of the pipe to be caught.

If the emergency column is stuck, the oil is installed on the bath. If it turns out to be unsuccessful, then they start unscrewing the pipes and lifting them in parts. For this purpose, a torpedo TSSH is passed through the funnel 11 and blown it up against

threaded connection of the emergency column.

Unscrewing of the pipes is carried out by transmitting the rotation of the drill string.

pipes through subs 6-8 and case 1. Located in the windows of case 1, dies 2 perceive tangential forces from the case and transmit them to the pipe. Unscrewing the pipe and lifting it to the surface.

The release of the trap from the fallen emergency column is carried out as follows. A sharp force is applied to the trubolovka down, then

raise the drill string so that the dies are under slight vertical tension. Begin the rotation of the column to the right with a slow rise.

Since the notches of the dies are made in the form of a left-handed thread, the trubolae gradually rotates to the right from the end of the inserted pipe as it is rotated to the right.

Claims (1)

Invention Formula An outer trubolovka, including a hollow body with windows, located in the body cavity and springed relative to it in the axial direction the locking elements with gripping areas in the lower part located in the windows of the housing, characterized in that, in order to increase the load capacity of the outer trubolovka, it is provided with a guide pipe with a conical outer surface concentrically mounted in the housing, the inner surface of the housing has a conical surface portion that is reciprocal conical 0 of the surface of the guide nozzle, and the upper portions of the locking elements are inclined and located on the conical surface of the housing and the guide nozzle, the angle of inclination The five upper sections of the fixing elements are equal to the angle of inclination of the conical surfaces of the housing and the guide nozzle, on the inner surface of the housing under the windows there are inclined sections, and the bottom sections of the fixing elements are made with inclined surfaces, which correspond to the inclined sections of the housing, and "L Riga.1 i Fig.Z