RU2442927C1 - Technologic emergency coupling sleeve (variants) - Google Patents

Abstract

FIELD: oil and gas industry.

SUBSTANCE: invention refers to technological emergency coupling sleeves used to execute works connected to localization of oil pipelines destruction consequences. Technological emergency coupling sleeve consists of ring sealing chamber installed in the body and exit branch. The sleeve has locking belt made at the end opposite to exit branch. Locking belt is made in the body with channel in the form of flattened cone tapering towards emergency pipe, wall of emergency pipe and no less than three locking balls located in the channel. It also has feeding branch.

EFFECT: invention ensures reliable locking and fixation of sleeve body on the pipe.

5 cl, 3 dwg

Description

Carrying out technological emergency work at depths in extreme conditions is impossible without new, extraordinary solutions, the use of which under ordinary conditions would cause classical experts only to condemn and grin.

The present invention relates to the field of pipeline transport and is used to install stop valves, the removal of the displaced body, oil, in the authorized directions (piping lines).

Known coupling ("Technological emergency coupling (options)", register. No. 2010125089, incoming No. 035683 from 06/21/2010, Akatiev V.A., Sobolev G.P. and others), consisting of a housing, shell and flanges in which the annular chamber is located, when external pressure is applied to it, compaction occurs along the cylindrical contact surface of the chamber and pipe. The force with which the chamber is pressed against the pipe creates a frictional force that prevents the longitudinal movement of the coupling.

The described design, considered as a prototype, has a significant drawback, consisting in the insufficient holding longitudinal force of the coupling. With large longitudinal efforts, the coupling can be shifted, removed from the lockable pipe.

This drawback can be eliminated by using a longitudinal shear force to drive the locking mechanism of the clutch.

Structurally, this problem can be solved by placing a locking mechanism in the coupling housing that allows the coupling to move along the pipe in one direction and prevents the coupling from moving in the other. This assembly (Fig. 1), called the locking belt 5, is made in the coupling body 2, its inner surface has a recess in the form of a truncated cone, the bases 4 and 9 of which are perpendicular to the axis of the coupling. Several balls 7 are placed inside the locking belt 7. The volume in which the balls 7 can move is limited from above and below by the bases of the cone 4 and 9, the side surface of the recess in the locking belt 6 and the pipe wall 3.

The locking mechanism of the clutch is as follows. When the coupling body moves (FIG. 1), the balls under the action of inertia and friction will lag in their motion relative to the coupling body and it will freely slide on the pipe.

If necessary, the drainage of fluid through the pipe can be stopped by closing the pipe fittings 12 and the coupling will receive a force that moves it in the opposite direction.

Figure 2 shows the claimed device with the placement of the locking belt inside the pipe. The designations of the elements of figure 2 are similar to the elements of figure 1.

Figure 3 shows the claimed device with the placement of locking devices from the inner and outer surfaces of the emergency pipe. The designations of the elements of figure 3 are similar to the elements of figure 1.

The principle of operation of the locking belt can be explained as follows. When forces arise that make the clutch move upward, the balls are held up and the clutch housing moving upwards presses the balls to the surface of the pipe, it stops, the so-called “biting”.

This process can also be described as follows:

- with "conditionally" fixed balls, the movement of the coupling body, leading to an increase in the distance between its conical surface and the pipe, is free;

- when this distance decreases, locking occurs.

The force with which the coupling is locked will be determined by the number of balls in the locking belt and the number of locking belts made in the coupling body. The number of balls must be at least three. It is three balls that provide a stable position of the coupling housing relative to the pipe.

The number of locking belts should be determined on the basis of the longitudinal forces arising when the coupling is brought into working position.

In order to facilitate, simplify the process of sliding the coupling onto the pipe, it is advisable to make (place) a guiding bell 13 on the coupling body, which would allow the longitudinal axes of the coupling and pipe to be combined.

Thus, the clutch (figure 1) consists of a housing 2, in which the following structural elements are made:

1) outlet pipe 1, designed to drain or lock the fluid flowing from the pipe;

2) shell 11 with flanges, inside of which an annular chamber 10 is located, which carries out compaction along the cylindrical surface of the pipe when external pressure is applied;

3) locking belt 5, one or more, in the conical recess of which there are balls of at least 3, resting on the surface of the pipe 3. The balls are fixed around the circumference using a separator or separate longitudinal recesses (grooves). In order to increase the bearing capacity of the coupling, its sealing and fixing can be organized along two surfaces of the pipe, internal and external, for which two coaxially located sealing and locking belts are placed in the coupling body;

4) a bell 13, which allows for longitudinal movement of the coupling to combine the longitudinal axis of the coupling and pipe.

The operation of the coupling is as follows.

The coupling, in the absence of external pressure in the chamber, is put on (pushed) over the muffled pipe. Its movement along the longitudinal axis will be accompanied by transverse movements, which is achieved coaxiality of the contacting elements - couplings and pipes. At the end of the movement, external pressure is supplied to the chamber and the coupling is fixed to the pipe. When a force arises that moves the coupling toward the outlet pipe with the taper surface of the locking belt, the balls are pressed against the pipe surface and locking occurs, biting the coupling body.

Thus, the proposed constructive solution allows to provide a higher degree of fixation of the coupling on the pipe and create stable conditions for the removal of oil or locking the pipe.

Claims (5)

1. Technological emergency coupler, consisting of an annular sealing chamber located in the housing and a discharge pipe, characterized in that it has a locking belt formed on the opposite discharge pipe end of the sleeve, formed in the housing by a recess in the form of a truncated cone, tapering towards the emergency pipe, the wall of the emergency pipe and at least three locking balls placed in the recess, in addition, has a pointing bell. 2. Technological emergency coupler according to claim 1, characterized in that the locking belt is double with one inside the emergency pipe and the other outside the emergency pipe. 3. Technological emergency coupler according to any one of claims 1 and 2, characterized in that it has more than one locking belt. 4. Technological emergency coupler according to any one of claims 1 and 2, characterized in that the locking balls are separated by separators. 5. Technological emergency coupler according to any one of claims 1 and 2, characterized in that the locking balls are placed in longitudinal recesses (grooves).

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