RU95354U1 - DOUBLE-CROSS PREVENTOR - Google Patents

Abstract

 1. Double-cross die-type preventer containing a housing equipped with load-gripping elements, a through central channel, two flanges located on opposite sides and an installed insert, on each of the two other sides there are pairs of closed die-slots located in parallel and eccentric planes with respect to each other, perpendicular to the axis of the through central channel, in each die groove are arranged to move along the guide rails of the die by means of drives, each the last of them is fixed in the housing using a cover, characterized in that the housing and each of the four covers mounted on the housing are cast according to the gasified model, each of the covers being made integrally with a glass, while in the die grooves located closer to the flange in which the insert is placed, a pair of pipe dies is installed, and in the other pair of die grooves blind dies are installed, each of which is combined with a knife for cutting the geophysical cable located in the through hole of the insert and with one of the end equipped with geophysical equipment, in addition, heating chambers are made on the body, over which additional covers are fitted, equipped with connecting elements for supplying steam. ! 2. The preventer according to claim 1, characterized in that each of the connecting elements for supplying steam is equipped with a pair of fittings, the latter mounted on additional covers.

Description

The utility model relates to the oil and gas industry, namely, devices for sealing the wellhead and preventing oil and gas manifestations in the form of open fountains when drilling and repairing wells, ensuring safe operation, protecting the subsoil and the environment.

Known improved separation nut for use in preventers to prevent (flame) extinguishing, which is installed temporarily during the development of oil or gas wells by connecting the base and cap (tip, clamp), while the mounting bolts are inserted through the holes in the cap (clamp), and when sealing into the base, and screwed into the mounting nuts located in the recesses (cavities) of the base, the sealing gaskets are tightly pressed when tightening the nuts and bolts to seal the threads bearing bolts and nuts from corrosive substances that can leak through the holes of the cap (US Pat. No. 4574881 US. Publ. 1986-03-11).

Known hydraulic perforating preventer to prevent (ejection of flame) extinguishing, used when working on gas and oil wells, containing a cable (cable) with a cross section and a grounded control device, in the groove of which are installed ring glands at the upper position of the four running valve of the well and the lower position of the base ; the middle position of the base is provided by a plunger with a cross section and a valve fixed to each other; the end of the beam is connected to the valve by a threaded screw; the cavity A of the inlet is located on the right side of the valve on the base, and the cavity B of the outlet is on the left side of the valve; O-shaped seals with bushings are located in a sealed valve groove and in a sealed plunger groove; cavities A and B of the inlet are connected by a threaded valve of a three-position four-way switching valve of the traction stiffness line; valve, pressure reducing and increasing valves and threaded screw of the accumulator (Pat. No. 2929161 CN. Publ. 2007-08-01).

A blow-out ram preventer is known, comprising a housing with a vertical barrel channel and a circular cross-section ram channel with sealing elements, covers and actuators are provided on both sides thereof, having a hollow interchangeable preventer element in the form of an open cylindrical insert with through holes in the side cylindrical surface, mounted in the boring of the ram channel through holes in alignment with the stem channel, in which on the outer lateral cylindrical surface along its direction yayuschih on both sides of the brainstem vertical channel slot provided under the sealing elements moreover the inner surface of the cylindrical insert is in contact with the dies (Pat. №2214499RF. Publ. 20.10.2003).

However, the known blowout preventer die preventer has a sufficiently large size, its design does not provide for the combination of pipe and blind dies during use.

A known preventer comprising a housing with symmetrical symmetrical perpendicular to the axis of the vertical channel of the preventer, sets of dies of two sizes with elastic seals, in addition, the control drive of each of them, including a drive rod having a threaded connection with a nut, while the dies of two sizes are combined into the die block and placed in the housing of the die block having a radial seal. The dies of two sizes are made in contact with each other by the lateral and horizontal surfaces of the elastic seals. In the die blocks, the upper die is fixedly mounted in the die block case. The drive rod of the upper die is hollow and is connected to the housing of the die block with the possibility of rotation relative to it. Inside the drive hollow rod is located the drive rod of the lower die, connected to it with the possibility of rotation relative to it and the drive hollow rod. The general axis of rotation of the drive rods is perpendicular to the axis of the vertical channel of the preventer and can be shifted vertically by an amount ranging from zero to half the diameter of the bore under the body of the die block (Pat. No. 2237795 RF. Publ. 10.10.2004).

However, the design of the known preventer does not provide for the combination of pipe and blind dies during use.

A hydraulic double air flat valve and a flat preventer are known, which consists of a main body, a block of four flat valves moving in the opposite direction inside the main body, a hydraulic oil cylinder, a tension beam, left and right end caps. The hydraulic oil cylinder is connected to the block of four flat valves by a tension rod, the caps of the left and right ends are fixed on both sides of the main body, inside the block with flat valves (Pat. No. 201016290 CN. Publ. 2008-02-06).

However, the prior art design of a hydraulic double air flat valve and a flat preventer does not provide for the combination of pipe and blind dies during use.

A known preventer is a plate-slide separate "station wagon" comprising a housing with upper and lower flanges, having a through axial channel for passage of pipes being lowered into the well, two upper side channels located opposite to each other, oriented perpendicular to the axial channel and closed by side covers, and made under the upper channels and closed by its side cover the lower side channel, the axis of which is located at an angle to the axis of the upper side channels, a ram shutter located inside the housing containing e oppositely arranged dies for sealing pipes along the outer diameter, installed in the upper lateral channels of the housing with the possibility of movement in the direction perpendicular to the axial channel, a movable slide plate designed to block the through axial channel in the absence of pipes in the well and installed in the lower side channel with the possibility movement in the direction perpendicular to the axial channel, and one self-contained screw drive for each die and for the slide plate installed in the corresponding side cover, in which the housing is equipped with load-gripping elements and is made integral with load-gripping elements made of alloy steel, the through axial channel in the housing is either cylindrical in whole, or a part of this channel located above the upper side channels is made conical, facing the large base of the cone outward at the same time, when part of the axial channel is conical in the upper flange, at least two lateral radial through holes are made, each of which is intended o for the tight placement of the fixation means of the sealing inserts, while the working shank of the fixation means is made with a longitudinal conical flat, and on the end parts of the upper and lower flanges an annular groove is made, which serves to accommodate the sealing ring, and on the outer sides of the housing on the sections between the side flanges stiffeners (Certificate No. 52906 of the Russian Federation. Publ. 04/27/2006).

However, the well-known preventer die-slide separate "wagon" is quite laborious to manufacture and has a large labor costs, in addition, its design does not provide for the combined use of pipe and blind dies, in addition, the known design has a fairly large size.

The objective of this utility model is to reduce the time of pipeline repair work by combining pipe and blind dies in the structure, improving operating conditions by reducing the structure's dimensions, increasing its strength and reducing labor costs in its manufacture.

The problem is solved in that in the double-cross-type preventer containing a housing equipped with load gripping elements, a through central channel, two flanges located on opposite sides and an installed insert, pairs of closed die grooves located in planes are made on each of the other two sides parallel and with eccentricity with respect to each other, perpendicular to the axis of the through central channel, in each die groove are arranged to move along the direction Generally speaking, the dies, by means of drives, each of the latter is fixed in the housing by means of a cover, the housing and each of the four covers attached to the housing are cast according to the gasified model, each of the covers being made in one piece with a glass, while in the die grooves located closer to the flange in which the insert is placed, a pair of pipe dies is installed, and in the other pair of die grooves there are blind dies, each of which is combined with a knife for cutting the geophysical cable located in the through hole and inserting at one end and fitted with geophysical equipment, moreover, formed on the casing heating chamber, on which are fixed the additional cover equipped with coupling members for supplying steam.

It is advisable for ease of use each of the connecting elements for supplying steam to equip a pair of fittings that are mounted on additional covers.

The present utility model is illustrated by a detailed description, drawings, which depict:

Figure 1 - main view, combined with section according to the utility model;

Figure 2 is a top view combined with section along the plane of the tube dies, the same as figure 1;

Figure 3 is a top view combined with section along the plane of the location of the deaf dies, the same as in figure 1;

Figure 4 - insert in the context of a geophysical cable, according to a utility model;

5 is a main view of the drive dies, the same as in figure 1;

6 is a side view of the drive dies, the same as in figure 2, 3.

The dual-cross die preventer comprises a housing 1 equipped with load gripping elements, a through central channel 2, two flanges 3 and 4 located on the spirit of opposite sides of the housing 1 (Figs. 1, 2). Case 1 is made by casting on gasified models. On each of the two other sides of the housing 1 are located, in parallel and perpendicular to the axis of the through central channel 2 planes, opposite and opposite to each other are two pairs of closed through die channels 5 and 6 (not shown). In the latter placed, with the possibility of moving along the guides, pipe dies 7 and 8, by means of actuators 9 and 10 having covers 11 and 12, made in one piece with a glass cast according to gasified models. Each of the covers 11 and 12 is fixed to the housing 1 by means of connecting elements. On two opposite sides of the housing 1, the heating chambers 13 and 14 (FIG. 3) are made externally, over which additional covers 15, 16 of the heating chambers 13, 14 are mounted, equipped with connecting elements 17, 18 (not shown) for supplying steam. For ease of use, each of the connecting elements 17, 18 for supplying steam is equipped with a pair of fittings 19, 20. Each of the latter is mounted respectively on the cover 15 and 16.

In addition, on each of the two other sides of the housing 1 in a plane located with an eccentricity with respect to the first and below it, two closed through die grooves 21 and 22 (not shown) are made, opposite each other (Figs. 1 and 3). In the latter there are placed, with the possibility of moving along the guides, blind dies 23 and 24, by means of actuators 25 and 26 having covers 27 and 28, made in one piece with a glass cast according to gasified models. Each of the covers 27 and 28 is fixed to the housing 1 by means of connecting elements. In this case, each blank plate 23, 24 is combined with a knife 29, 30 for cutting off the geophysical cable 31 located in the through hole of the insert 32 and equipped at one end with geophysical equipment 33 (Figure 4).

A screw 34 is placed in each of the covers 11, 12, 27, 28 (Figure 5), each of the latter is connected to each of the pipe dies 7, 8 and the blind dies 23, 24 by means of each of the pushers 35. The arranged pipe drives 7, 8 and blind dies 23, 24 (Figs. 2, 3) are placed and fixed on the housing 1 in the respective planes using the connecting holes and elements.

For the manufacture of a one-piece casing 1 of a dual-cross preventer (hereinafter referred to as a preventer), a model of casing 1 is made of foam plastic (Figure 1). In addition, models of each of the four covers 11, 12 and 27, 28 are made. In addition, each of them is made in one piece with a glass. Then, using gasified casting according to the models, the housing 1 is made, the covers 11, 12 and 27, 28 of the preventer (Figs. 1, 5, 6).

Each of the four drives 9, 10 is arranged to move the tube dies 7, 8 and 25, 26 to move the blind dies 23, 24. Screws 34 are included in each of the drives 9, 10, 25, 26 (Figs. 3, 4). The latter are indirectly associated with pushers of pipe dies 7, 8 and blind dies 23, 24. In this case, the screws 34 are placed, respectively, in the covers 11, 12, 27, 28, which completed the whole with the glasses. Each of the screws 34 is associated with each of the pushers 35 of each of the pipe dies 7, 8 or each of the blind dies. Then fix each of the four covers 11, 12, 27 and 28 on the housing 1 by means of connecting elements (Fig.1, 2). In this case, each tube die 7, 8 is connected by means of a pusher 35 to the drive 9, 10, respectively, and placed in the slot grooves 5 and 6 on each of the two sides of the housing 1 opposite each other, two in parallel and perpendicular to the axis of the through central channel 2 planes. For connections and sealing, standard screws, bolt joints and sealing elements are used, the number of which is reduced due to the manufacture of covers 11, 12, 27, 28 with glasses in one piece.

The heating chambers 13, 14, which are made on the outer sides of the housing 1 and are opposite each other, are closed with additional covers 15 and 16, respectively. Each of the latter is equipped with connecting elements 17 and 18 having pairs of fittings 19 and 20, through which hot air for heating if necessary, the housing 1 (Fig.1, 3).

The built-in preventer for the dual-cross die is ready for use.

Using load gripping elements, place the housing 1 above the well.

If necessary, exploration in the through central channel 2 of the housing 1 install an insert 32, which is equipped at one end with geophysical equipment 33 (Figure 4). The latter, gradually moving, is placed in the well for its research. If necessary, after the end of the study, move the blind dies 23 and 24 in the die grooves 21 and 22 along the guides towards each other and cut the geophysical cable 31 with the help of knives 29 and 30, after which the well is sealed with blind dies 23 and 24.

By moving the pipe dies 7 and 8 towards each other, along the respective guides, the pipes are sealed by the outer diameter.

Pipe dies 7, 8 and blind dies 23, 24 are moved using movement elements that are mounted on each of the screws 34.

To depressurize the wellhead, the pipe dies 7, 8 and the blind dies 23, 24 are moved in the reverse order to the initial position.

The dual-cross die-type preventer can be used both in manual and automatic control modes.

The proposed utility model allows to increase the strength of the hull during its operation, to increase the duration of the life cycle of a dual-cross preventer. The use of casting according to gasified models for the manufacture of its body, covers in one piece with a glass allows to reduce the complexity of their manufacture, labor costs and metal consumption. In addition, to reduce the number of connecting and sealing elements, respectively, to increase the strength characteristics of the dual-cross die preventer.

The proposed double-cross die preventer allows to create improved conditions for its operation and increases the service life. It has a reduced overall height.

In addition, the proposed utility model is easy to maintain and allows to prevent emissions and open fountains of oil and gas wells during repair work, which preserves the ecological balance of the environment.

The proposed preventer is manufactured at Remstankomash LLC in accordance with TU and GOST.

Claims (2)

1. Double-cross die-type preventer containing a housing equipped with load-gripping elements, a through central channel, two flanges located on opposite sides and an installed insert, on each of the two other sides there are pairs of closed die-slots located in parallel and eccentric planes with respect to each other, perpendicular to the axis of the through central channel, in each die groove are arranged to move along the guide rails of the die by means of drives, each the last of them is fixed in the housing using a cover, characterized in that the housing and each of the four covers mounted on the housing are cast according to the gasified model, each of the covers being made integrally with a glass, while in the die grooves located closer to the flange in which the insert is placed, a pair of pipe dies is installed, and in the other pair of die grooves blind dies are installed, each of which is combined with a knife for cutting the geophysical cable located in the through hole of the insert and with one of the end equipped with geophysical equipment, in addition, heating chambers are made on the body, over which additional covers are fitted, equipped with connecting elements for supplying steam. 2. The preventer according to claim 1, characterized in that each of the connecting elements for supplying steam is equipped with a pair of fittings, the latter mounted on additional covers.