SU1677254A1 - Outside spear - Google Patents

Abstract

The invention relates to the oil industry. The aim of the invention is to increase the reliability of the operation of the pipe by providing guaranteed pipe grip at small gaps in the well. For this purpose, in the die containing a hollow body with a segment die and axially moving the die pusher located axially and telescopically mounted above it, the die is fixed in the extreme upper position by a shear element. Slots are made on the inner surface of the housing in the upper part, and the die pusher is fixed in the initial position by a shear element and has longitudinal slots on the outer surface, which respond to the longitudinal slots of the housing to interact with the latter. 4 il.

Description

The invention relates to the oil industry, in particular, to technical means for catching and retrieving tubular products of different diameters from wells (cut pipes, ESP sections, etc.).

The aim of the invention is to increase the reliability of the operation of the pipe by providing guaranteed pipe grip at small gaps in the well.

The goal is achieved by the fact that the body of the device is telescopically set on the end coupling of the tool and made in the form of a hollow cylinder with internal cams in the upper part, a trapezoidal profile of the section with an annular outlet in the lower part and longitudinal ducts under the rusks, and on the opposite side with a through longitudinal groove for mounting double-sided wedge element in the form

segment, and the cams interact with the reverse cams of the end coupling of the tool.

Figure 1 shows the diagram of the outer shell in section; figure 2 - section aa in Fig, 1; on fig.Z-section bb in figure 1; figure 4 - section bb In figure 1.

The outer trubolovka consists of a housing 1, made in the form of a hollow cylinder with longitudinal slots in the upper part on the inner surface (section B-B), an inner annular protrusion in the lower part with a section profile in the form of a versatile trapezium and longitudinal grooves under the crackers 2 (section B -B) Inside the case 1 a riving element 3 is mounted, made in the form of a segment die with a through longitudinal groove in which the head of the stud 4 is placed - a phase element (section AA). At the top of the wedging h-l

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There is a radial drilling for the rivet 5. To fix the cracker 2, the housing 1 provides radial drilling for the stud 6. In the upper part of the internal cavity of the housing there is a pusher 7 with longitudinal slots, counter slots of the housing 1, the pusher 7 is made in the form of a socket and screwed on the lower end of the transport tube 8. A shear element - a pin 9 - serves to hold in engagement the longitudinal slots of the body and the pusher.

The outer work works as follows.

When assembled, it is lowered onto drill or tubing pipes in the well to the head of the emergency pipes. With the cranking and axial movement of the fishing tool, the emergency pipe head is inserted into the shed of the die. During the period when the head of the pipe resists in the cracker 2, an axial load is created. In the process of achieving the axial forces of the calculated value, the pin 9 and the pusher 7 are cut, lowering, cutting off the rivet 5 and moving the element 3 downwards, wedging it between the body 1 and the emergency object, at the same time his head deviates even more. In this case, the emergency pipe will forcefully press against the biscuit 2 and the opposite wall of the housing 1. During the movement of the element 3 down, the head of the stud 4 moves along a longitudinal groove and prevents the element 3 from falling out of the housing. To limit the axial movement of the pusher 7 on the pipe 8 there is an outer retaining ring (not shown).

By moving the tool upwards, the element, moving on an inclined surface, further wedges the emergency object, seizing it securely and holding it during the ascent to the day surface.

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The outer trubolovka, including a transport column of pipes, a hollow body located on the inner surface of the body with the possibility of axial

displacement of the segmented die and telescopically mounted in the housing above the die, the plunger of the die in the form of a nozzle, characterized in that, in order to increase the reliability of its operation due to

ensuring guaranteed pipe grip at small gaps in the well, the plunger is fixed in the initial position on the body by a shear element, rigidly connected to the transport casing, and

its outer surface is made longitudinal splines, and to interact with the latter on the inner surface of the body there are longitudinal splines, responding to longitudinal splines of the pusher, the segment die is fixed on the body in the initial position with a shear element, and the pusher is installed with the interaction in the working position with the segment die.

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Claims (1)

Claim An outer tube including a transport pipe string, a hollow body located axially movable on the inner surface of the housing, a segment die and a telescopic pusher in the form of a nozzle, telescopically mounted in the housing above the die, characterized in that, in order to increase the reliability of its operation by ensuring guaranteed pipe gripping with small gaps in the well, the pusher is fixed in its original position on the body by a shear element, is rigidly connected to the transport pipe string, and on its outer overhnosti made longitudinal slots, wherein for the interaction with the latter on the inner surface of the housing there are longitudinal splines and reciprocal splines longitudinal pusher segmented die is fixed on the housing in an initial position by a shear member, and a pusher mounted for engagement in the operative position with the ram segment.