RU150734U1 - CATCH FOR EXTRACTION OF ORIGINAL STOCK - Google Patents

Abstract

A catcher for gripping and extracting a tattered wellhead rod from a well, comprising a body having inside a conical surface and a guiding reverse conical surface, locking bodies in the form of balls, characterized in that there is a chamber for balls, a spool for holding balls in the chamber, opened by the end face of the extracted rod to release the balls, and in the lower part of the shutter made of flexible and elastic material, preventing the balls from falling into the well if they fail to capture.

Description

The utility model relates to the oil industry, in particular, it can be used in the repair of oil wells for fishing operations in the elimination of accidents with downhole pumping equipment.

Known ball catcher for catching the ragged end of the rods in the production casing (see patent RU 2393328 C1 dated 06/27/2010 according to class E21B 31/18), a device for capturing and removing dangling rods from the well (see patent RU 56455 U1 from 09/10/2006 according to class E21B 31/00. The disadvantage of existing devices is that they are designed to capture sucker rods having substantially smaller diameters compared to the wellhead rod, as well as the inability to use them in a string of tubing pipes operating at the same time - noy operation of multiple objects (due to the limited annulus).

The use of a catcher of this design, using balls, is due to the compressed dimensions of the space between the production string of tubing and the wellhead of the string of pump rods in wells with simultaneous separate operation of several objects.

In FIG. 1 shows a catcher for extracting the wellhead rod, which consists of a housing 1 with a conical surface and a guide torn off the wellhead rod with a reverse conical surface, locking bodies in the form of metal balls 2, jamming the body of the extracted wellhead rod in the housing 1, chamber 3 for balls, spool 4 for holding balls in the chamber, shutters 5 made of flexible flexible material, springs 6.

In FIG. 1 shows a catcher, characterized in that there is a chamber 3 for balls, a spool 4 for holding balls in the chamber, opened by pushing the retrievable wellhead by pushing with the end face, while the balls are released and fall into the body 1 with a conical surface, wedging the body of the wellhead rod, thereby allowing you to raise the string of pump rods to replace a torn wellhead rod, as a result of this there is no need to lift the entire production string with a suspension of pump rods. In the lower part of the catcher there are blinds 5 made of flexible and elastic material that prevent the balls from falling into the well if they fail to set and leave the balls in the catcher.

The spool 4 in the free state is pressed against the housing 1 by a spring 6 and the chamber with balls is closed. The chamber is filled with balls through the side openings on the wall.

The goal is to repair oil wells without raising the production string of tubing, it is enough to replace only the first section of the suspension rods, namely a torn off wellhead. As a result of this, premature underground well repair is prevented, and means and time for well repair are reduced.

Claims (1)

A catcher for gripping and extracting a tattered wellhead rod from a well, comprising a body having inside a conical surface and a guiding reverse conical surface, locking bodies in the form of balls, characterized in that there is a chamber for balls, a spool for holding balls in the chamber, opened by the end face of the extracted rod to release the balls, and in the lower part of the shutter made of flexible and elastic material, preventing the balls from falling into the well if they fail to capture.

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