SU1579982A1 - Device for separating pipe column from with packer - Google Patents

Abstract

The invention relates to the mining industry and is intended for testing oil and gas wells and can be used in emergency situations during geophysical and hydraulic surveys. The goal is to increase the reliability of the device while simplifying the design, the process of commissioning and its maintenance. Essence: the device is provided with an intermediate sleeve placed concentrically in the housing between the hollow rod and the slotted sleeve, and the drive is made in the form of a tubular element with external splines, mounted for axial movement in the cavity of the rod and the intermediate sleeve, which has internal slots for interaction with external slotted tubular element. A compression spring is installed between the splined hub and the lower sub. 2 Il.

Description

The invention relates to the mining industry, in particular to the field of testing oil and gas wells, and can be used in emergency situations during geophysical and hydrodynamic studies.

The aim of the invention is to increase the reliability of the device while at the same time simplifying the design, process of adjustment and its maintenance.

Fig. 1 shows the device, section, until operation; Figure 2 is the same after operation.

The device for disconnecting the tubing plower (Fig. 1) consists of an upper sub 1, connected by threads with upstream devices, body 2, having internal upper and lower slots, in which a hollow rod 3 is installed. The latter is connected with the upper sub 1 and a splined connection with the housing 2, and has internal splines. Case 2 is threaded to the lower sub 4. In case 2, intermediate sleeve 5 is placed concentrically between rod 3 and spline sleeve 6. On the inner surface of intermediate sleeve 5 there are slots, and on the outside there is a thread for connection with case 2, the direction of which is opposite to threads on the lower sub 4. The drive is made in the form of a tubular

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element 7, which has external splines for installation with the possibility of axial movement in the cavity of the rod 3, and intermediate sleeve 5. Spline sleeve 6 in its lower part can be in contact with spring 8, designed to prevent its spontaneous movement.

The device works as follows.

When the packer is seized, the tubular element 7 is lowered from above, which, with its external splines, enters the inner splines of the hollow stem 3 and the intermediate sleeve 5. Then moves the spindle 3 down until the outer splines of the spindle 3 come out of engagement with the inner splines of the body 2 and transfer torque on the rod 3, which is then transmitted by means of the tubular element 7 to the intermediate sleeve 5, causing the latter to move downwards, since it is connected by a threaded connection with the housing 2. When moving downward, the sleeve 5 pushes the spring-loaded sleeve 6, whereby it exits splined engagement with the spline grooves of the lower housing 2, thereby raskontriva threadably engaged with the lower body 2 sub 4.

Then the rod 3 is moved upwards to engage with the upper splines of the body 2 and rotate to the right until the body 2 is detached from the bottom sub 4 and the released part of the tool is removed from the wells.

Claims (2)

1. A device for disconnecting a tubing string with a packer, comprising a housing, on which a top sub is mounted, connected to a hollow rod disposed in the body, a sleeve mounted in the housing, connected by a spline connection to it and a bottom sub interconnected by a thread, and a drive, The fact is that, in order to increase the reliability of the device while at the same time simplifying the design, the attack process and its maintenance, it is equipped 5799826 an intermediate sleeve placed concentrically in the housing between the hollow rod and the pinching sleeve, and the drive , made in the form of a tubular element with external splines, installed with the possibility of axial movement in the cavity of the rod and the intermediate sleeve, which has internal splines U to interact with the external splines of the tubular element, and on the outer surface of the intermediate sleeve there is a thread for connection with the housing, the direction of which is opposite to the direction of the thread on the lower sub. 2. Device pop. 1, which differs from the fact that a compression spring is installed between the slotted bushing and the lower sub.