RU42614U1 - SAFETY VALVE DEVICE - Google Patents

Abstract

A safety valve device comprising a housing consisting of nozzles for supplying gas, oil mixture and for diverting them into the discharge pipe, a seat, a locking member, a quick-detachable connection and a sealing element, characterized in that the nozzle for supplying gas is provided with a larger diameter pipe located relative to it concentrically and bearing on itself the supplying oil mixture and the discharge oil mixture and gas nozzles, a saddle with a shut-off element are installed at the end of the nozzle for supplying gas from the quick side detachable connection, and the locking element is made in the form of an elastic disk consisting of peripheral and central sections, and the peripheral one is made in the form of a ring, the profile of which in longitudinal section is a right triangle with the hypotenuse facing the center, and the central one is a segment of the ball reinforced with the side of its base with a metal element, the peripheral section is smoothly connected to the central bridge of limited width, the thickness of which decreases from the axis of its symmetry to the edge of the bridge.

Description

The proposal relates to valve devices and may find application in the oil industry to equalize the gas pressure in the annulus and the oil mixture in the injection pipe at the outlet of the oil well.

Known safety valve device, consisting of two nozzles connected respectively to the casing and pressure pipe, quick-detachable connections, venting valve gas, elbow connecting the two nozzles with the ground section of the pipeline (A.G. Molchanov, V.L. Chicherov. Oilfield machines and mechanisms, M., Nedra, 1983, p. 161, Fig. 11.39).

The disadvantages of the device are:

- poor reliability of separation of the annulus from the cavity of the discharge pipe;

- failure of the valve in operation at negative ambient temperatures due to freezing of the liquid phase in the elbow section located in front of the valve due to the lack of fluid movement in this section.

Closest to the technical nature of the proposed is a safety valve device, comprising a housing consisting

from nozzles for supplying gas, oil mixture and for diverting them to the discharge pipe, saddle, locking element, quick-detachable joints and sealing element (OZNA product catalog, TU 3712-022-00135786-2002, Oktyabrsky, Republic of Bashkortostan).

The main disadvantages of the device are:

- unsatisfactory operational reliability due to the communication of the cavities of the annulus of the well and the injection line with each other when fibrous materials enter between the shutoff member and the seat, as well as due to the formation of micro-cracks on their surfaces;

- the relatively high complexity of manufacturing, due to the use of expensive steels and the presence of parts, the manufacture of which imposes stringent requirements.

The technical task of the utility model is the creation of a device with increased operational reliability and low manufacturing complexity.

This problem is solved by the proposed safety valve device, comprising a housing consisting of nozzles for supplying gas, oil mixture and for diverting them into the discharge pipe, seat, locking element, quick-detachable connection and sealing element.

What is new is that the pipe for supplying gas is equipped with a pipe of a larger diameter, arranged relatively concentrically and bearing a supply of the oil mixture and a discharge of the oil mixture and

gas nozzles; a saddle with a locking body is installed on the end of the pipe for supplying gas from the quick-connect side, and the locking body is made in the form of an elastic disk consisting of peripheral and central sections, and the peripheral is made in the form of a ring, the profile of which in longitudinal section is a right-angled triangle to the center by the hypotenuse, and the central one - of the segment of the ball, reinforced from the base with a metal element, the peripheral section is smoothly connected to the central jumper of the ogre width, whose thickness decreases from the axis of its symmetry to the edge of the bridge.

Figure 1 shows a General view of the device in longitudinal section.

In Fig.2 - section A - A of Fig.1.

Figure 3 is a locking organ close-up.

The device consists of a gas supply pipe 1, an end portion entering the pipe 2, having a threaded section 3 for quick connection 4 on one side, and a partition 5 on the other hand, supply pipe 6 for the oil mixture and pipe 7 for the oil mixture and gas welded to the pipe 2. A saddle 8 with a locking member 9 is rigidly attached to the pipe 1. The latter is made in the form of an elastic disk consisting of peripheral 10 (Fig. 3) and central 11 sections, and peripheral 10 is made in the form of a ring, the profile of which is longitudinal The cross section is a right-angled triangle with the hypotenuse facing the center, and the central 11 is the segment of the ball reinforced from the side

its base with a metal element 12. The peripheral section 10 is smoothly connected to the central 11 jumper 13 of limited width, the thickness of which decreases from its axis of symmetry to the edge of the jumper. The peripheral section 10 of the locking element 9 is pressed against the seat 8 by a conical ring 14 and is fixed by the locking ring 15. The quick connection 4 has a union nut 16 and a rigid sealing ring 17. The device is installed on the wellhead.

The device operates as follows.

The locking element 9 is closed while the pressure in the cavity "a" (cavity "a" is connected to the cavity of the tubing (tubing)) is greater than the pressure in the cavity "b" (cavity "b" is connected to the annulus). As soon as the pressure in the cavity "b" is greater than the pressure in the cavity "a", the shut-off element opens slightly, and the greater the greater the difference in pressure, and the gas from the cavity "b" rushes into the cavity "a". Then he, along with the oil mixture, is sent to a freight fleet via an onshore pipeline. This happens as long as there is a pressure difference between the cavities “a” and “b”. As the pressure difference decreases, the locking member 9 gradually begins to return to its original position, and when this difference disappears, the locking member closes. With increasing pressure in the cavity "b" the operation is repeated. During the movement of the oil-gas mixture through the pipeline, the shut-off element is constantly washed by it, therefore, its freezing is excluded.

The proposed device allows you to:

- increase operational reliability due to the fact that the elastic edges of the locking element tightly overlap the surface of the saddle even if it has microchannels and fibrous particles;

- reduce the complexity of manufacturing due to the lack of design parts that are subject to stringent technological requirements.

Claims (1)

A safety valve device comprising a housing consisting of nozzles for supplying gas, oil mixture and for diverting them into the discharge pipe, a seat, a locking member, a quick-detachable connection and a sealing element, characterized in that the nozzle for supplying gas is provided with a larger diameter pipe located relative to it concentrically and bearing on itself the supplying oil mixture and the discharge oil mixture and gas nozzles, a saddle with a shut-off element are installed at the end of the nozzle for supplying gas from the quick side detachable connection, and the locking element is made in the form of an elastic disk consisting of peripheral and central sections, and the peripheral one is made in the form of a ring, the profile of which in longitudinal section is a right triangle with the hypotenuse facing the center, and the central one is a segment of the ball reinforced with the side of its base with a metal element, the peripheral section is smoothly connected to the central bridge of limited width, the thickness of which decreases from the axis of its symmetry to the edge of the bridge.