RU47426U1 - WELL CATCHER - Google Patents

Abstract

The utility model relates to devices for carrying out fishing operations in production and repair wells, and can be used to capture and extract pipes, tool shanks and other equipment from the well. The objective of the utility model is to increase the ability to reliably capture and retrieve objects of various purposes and sizes from the well. The essence of the utility model lies in the fact that in a downhole catcher containing a housing, a lead-in cone, a spring-loaded gripper, the gripper is made in the form of at least three legs, pointed on the inside and through springs fixed on the outside of the legs connected to the case , the legs are movably connected to the elements of the inlet cone, made in the form of stops fixed to one side of the body of the catcher.

Description

The utility model relates to devices for carrying out fishing operations in production and repair wells, and can be used to capture and extract pipes, tool shanks and other equipment from the well.

Known catcher released with interchangeable grippers (RU 2174586 C2, 10.10.2001), consisting of a body, inside which a rod is mounted with the possibility of axial movement, the body and the rod are connected to the functional elements of devices, for example, collet extractors, baits, implosion shells, tubes, moreover, the housing is equipped with a system for axial movement of the rod, made with the possibility of installing in it a device for determining the weight, control unit, indicating the presence or application of physico-chemical parameters of the medium, processing and trans garden information.

The described device is difficult to manufacture, does not give 100% the ability to pull out the captured object, since it is possible to unclench the paws, the more the weight of the extracted object, the greater the force to unclench the legs.

Known fishing tools, in particular outer tubes and catchers, downhole collet type (RU 2135737 C1, 08/27/1999; RU 2182217 C1 10.05.2002; RU 2191247 C1 10.10.2002; RU 2213201 C1 09.27.2003; RU 27626 U1). A common disadvantage of all these devices is the difficulty in manufacturing the main structural element - collets.

As a prototype, a device - a liner catcher RU 2190748 C1, 10.10.2001, which can be used to retrieve installed or accidentally left in the wells devices having a liner for the catcher, comprising a housing, a feed cone, a socket for the liner and a spring-loaded gripper made in in the form of a plate with a hole cut radially into several parts.

The disadvantage of this device is its limited use, due to both a fixed diameter of the hole in the capture plate, which does not allow the capture of devices with a small shank, and the inability to capture and remove anything other than devices with shanks, that is, having a step for gripping, equipment from wells. Not enough

the effectiveness of this device is also due to the design of the capture in the form of a segmented circle, the clamping force in which is provided (created) only by the spring.

The objective of the utility model is to increase the ability to reliably capture and retrieve objects of various purposes and sizes from the well.

The technical result is achieved by increasing the compression force of the spring-loaded grips during the capture of objects, moreover, the greater the weight of the captured object, the greater the compression force (engagement).

The objective of the utility model is solved in that in the downhole catcher containing the housing, the entry cone, spring-loaded grip, the grip is made in the form of at least three legs, pointed on the inside and through springs fixed on the outside of the legs connected to the body, the legs are movably connected to the elements of the inlet cone, made in the form of stops fixed to one side of the body of the catcher.

The movable connection of the legs with the stops can be made hinged.

The utility model is illustrated by drawings, where in Fig.1 shows a longitudinal section of a catcher, in Fig.2 is a section along aa

The downhole catcher comprises a housing 1, an emphasis 2, a swivel joint 3, tabs 4, a spring 5.

Downhole catcher works as follows.

The catcher is lowered into the well. Upon reaching the object 6, which must be removed from the well, for example, a pipe (as shown in the drawing) or the shank of the device, it is covered with the inside of the trap cavity. Recoverable Item 6 enters the enclosure! the catcher, the tabs 3 while expanding to the width of the captured object 6 and, trying to return to their original position, clamp the object and hold it with increasing effort. A catcher with a captured object is raised to the surface.

The proposed utility model is easy to manufacture and maintain, provides a reliable grip and lifting of objects from the well, and can be used both on production wells and on wells under repair and reconstructed.

Claims (2)

1. A catcher borehole, comprising a housing, an inlet cone, a spring-loaded grip, characterized in that the grip is made in the form of at least three legs, pointed from the inside and through springs attached to the outside of the legs connected to the body, the legs are movable connected to the elements of the inlet cone, made in the form of stops, fixed by one of the sides to the body of the catcher. 2. The catcher borehole according to claim 1, characterized in that the movable connection of the legs with the stops is hinged.