RU2454528C2 - Hydraulic shutoff aggregate for oil, killed and subsea wells - Google Patents

Abstract

FIELD: oil and gas industry.

SUBSTANCE: hydraulic shutoff aggregate for killed, oil and subsea wells contains assemblies A and B (dwg.3), each of them consists of tables (1, 19) interconnected by hinges (15). Two couples of brackets (2) are welded at right angle to table (1) of assembly A, between them there are grips (3) actuated by hydraulic cylinders connected to them by hinges (14) and to table (1) by hinges (12). Each bracket has seats (5). Stop (36) is welded at right angle to table (1), between the stop and end bracket (2) there is shaft (38) located, on which cutting-off mechanism - saw (39) is installed, with drive (40) and reduction gear (41). Power plant installed on table (1) consists of electric motor (7), oil pump (8), oil tank (9) and distributor (10), and provided with control levers (11). Assembly A table is connected to assembly B table by hinges (15). They may turn relative to each other by hydraulic cylinder (16) connected to two tables by hinges (17, 18). Table (19) has two brackets (20, 21) welded to it at right angle. Aft bracket (21) has hinge (25) connected to stock of hydraulic cylinder (24). Directing stocks (22) of hydraulic cylinder (24) are located between brackets (20, 21), along the stocks sliders (23) move. At the end of hydraulic cylinder (24) flange (27) is located to which damper (28) is connected by bolts. At one end the damper has branch pipe (31) with openings and cross shaped flange (32). At the other end the damper has coupling with stuffing box seals inside. Bracket (20) has hole (26) through which hydraulic cylinder (24) passes. To assembly B table stop (37) is welded at right angle, it interacts with stop (36) of assembly A table and they provide alignment of pipe (6), gripped by aggregate, with coupling (34) of damper (28).

EFFECT: eliminating oil leakage from killed well to environment.

4 cl, 3 dwg

Description

The present invention relates to the field of the oil industry, in particular to the production of oil equipment. It can be used to eliminate accidents in subsea oil wells - to prevent oil leakage from the emergency pipeline into the environment.

The valve is known from the prior art (see V.Ya. Karelin, A.V. Minaev. Pumps and pumping stations. 2nd edition, revised and supplemented. Approved by the Ministry of Higher and Secondary Special Education, 1986, pp. 132-133 , Fig.8.7.), Selected as a prototype, consisting of a housing with flanges on both sides, a locking part inside the housing, which is a locking disk that is lowered and raised by the spindle, and sealing rings. The spindle is sealed with an oil seal and equipped with a manual or mechanical drive.

A disadvantage of the known design is the impossibility of attaching it to the emergency pipeline at great depth due to the absence of a flange on it.

The objective of the invention is to increase the reliability of the speed of overlapping emergency pipeline.

The technical result consists in the fact that, having applied the proposed hydraulic lock, it becomes possible to block the emergency pipeline in a relatively short time. With the unit, both divers at an acceptable depth and deep-sea vehicles can work.

The problem is solved and the technical result is achieved due to the fact that the hydraulic shut-off unit for oil emergency subsea wells consists of two nodes A and B, interconnected by hinges, and node A has a table in the form of a steel plate on which an electric motor, an oil pump is placed , an oil tank and a distributor with control levers, a hinge associated with a hydraulic cylinder, the rod of which is connected to a table hinge of a node B, the table is made in the form of a steel plate with the possibility of rotation of one node relative to the other 90 degrees, while new is that node A additionally has hydraulic grips located between each of two pairs of metal brackets, 90 degrees welded to the table, in its lower part, on both sides, driven by hydraulic cylinders connected with a table and grips by means of hinges, and in each bracket there are conical cuts that end with a pipe seat made in the form of a semicircle, and between the extreme bracket and the stop, perpendicularly welded to the table, there is a shaft on which the cutting mechanism - the saw is located, and two brackets are welded to the table of the assembly B at right angles, between which there are two guide rods parallel to the table, along which the hydraulic cylinder sliders, the rod of which is attached to the rear bracket hinge, have a flange at the end of the hydraulic cylinder, to which, using bolts, a cruciform flange of the gate valve with a mechanical drive is connected, and in front of the gate valve there is a coupling and stuffing box seals inside it, and the seat of the brackets and the gate valve coupling are coaxial.

The problem is also solved by the fact that the hydraulic grippers are placed between two pairs of brackets perpendicular to the table, the grippers are connected to the brackets by means of hinges and are located in their lower part, on both sides, with the ability to make movements driven by hydraulic cylinders connected to grippers and a table using hinges, and the working part of the grippers is made under the diameter of the emergency pipe.

The problem is also solved by the fact that the saw is a mechanism consisting of a body, a working body (cutting part), a drive and a reducer installed between the extreme bracket and the stop of the node A with the ability to cut off the deformed end of the pipe, the drive can be either electric and hydraulic, and the saw is installed in a design that is most suitable for work in these conditions.

The problem is also solved by the fact that the gate valve is a mechanism consisting of a housing, inside which there is a locking device with the ability to block the passage in the housing, driven and operated by an electric or hydraulic actuator and gearbox, at the outlet of the valve there is a pipe with a cross-shaped flange and windows, and at the entrance to the valve there is a coupling made in the form of a cylinder, inside of which packing glands are installed, and in the working position of the unit, the valve coupling and Captured pipe coaxial.

The invention is illustrated by drawings, in which the following is presented.

Figure 1 - hydraulic locking unit in its original position (side view).

Figure 2 - hydraulic locking unit in its original position (front view).

Figure 3 - hydraulic locking unit in the working position (side view).

The hydraulic locking unit consists of two nodes A and B, pivotally connected to each other with the possibility of rotation of one relative to the other by 90 degrees. Node A (figures 1-2) consists of a table 1, made in the form of a rectangular steel plate. Two pairs of brackets 2 in the form of steel plates are welded to the table at an angle of 90 degrees. Between the plates of each pair, in the lower part, on both sides there are grips 3, hinged 4 connected to the brackets 2. In all four brackets there is a saddle 5 made in the form of a semicircle, the diameter of which is equal to the diameter of the emergency pipe 6. Of the extreme points of the saddle 5 are made conical cuts, the edges of which serve as guides for the pipe. The axial line of the saddles 5 is parallel to the plane of the table 1. On the table 1 is a power plant consisting of an electric motor 7, an oil pump 8, an oil tank 9 and a distributor 10 with control levers 11. On both sides of the table 1 there are hinges 12 that are connected to the hydraulic cylinders 13 The rods of the hydraulic cylinders 13 are connected to the hinges 14 of the grippers 3. The node A is connected to the node B using the hinges 15. The rotation of one node relative to the other is carried out using the hydraulic cylinder 16 connected by a hinge 17 on the node A and a hinge 18 on the node B. The node B consists of the table 19, made in the form of a rectangular steel plate, in the lower part of which brackets 20 and 21 are welded in the form of plates, between which parallel to the table are the guide rods 22. The sliders 23 of the hydraulic cylinder 24 move along them. The sliders are made with the hydraulic cylinder body as one whole. The rod of the hydraulic cylinder 24 is connected to the bracket 21 by a hinge 25. The bracket 20 has an opening 26 through which the hydraulic cylinder 24 passes, and it is on the same axis with the seats 5 on the brackets 2 (Figure 3). The hydraulic cylinder 24 at the end has a flange 27, to which, using bolts (not shown), a valve 28 is connected, consisting of a housing, inside of which there is a locking device actuated by the engine 29 through the gearbox 30. The engine can be either electric or hydraulic. The valve 28 has a pipe 31, at the end of which a cross-shaped flange 32 is made, and there are windows 33 in the pipe. On the other side of the valve 28, a coupling 34 is made, which is on the same axis as the emergency pipe 6 captured by the unit (Figure 3). Stuffing box seals 35 are installed inside the coupling 34. On each table of the node A and B, an emphasis 36 and 37 are made at an angle of 90 degrees, which help to set the tables in the same plane, and the pipe 6 and the coupling 34 (Figure 3) are located on the same axis. Between the stop 36 and the extreme bracket 2, a shaft 38 is mounted on which the cutting mechanism is located - a saw 39 with a drive 40 and a gearbox 41. The drive can be either electric or hydraulic. A saw is installed on the unit in a design that is most suitable for working in these conditions. The mechanism of lowering and raising the saw in figure 3 is not presented.

High pressure hoses and oil pipelines are also not shown in the drawings. The control levers shown in the drawings can be transferred to the remote control of the deep-sea vehicle, and power is supplied via cable from the board of the surface vessel. Due to the fact that the locking unit will have significant weight, which will complicate the operation of the deep-sea vehicle, a pontoon of such a displacement is connected to the cable on which the unit will be immersed so that it provides the necessary positive, negative or zero buoyancy for the unit.

Hydraulic locking unit operates as follows. From a surface vessel on a steel cable, the unit lowers to the accident site in the initial position (Figure 1-2), when the table of node A is at an angle of 90 degrees relative to the table of node B. Divers or a deep-sea vehicle are immersed there. If a damaged pipeline is detected with the help of manipulators on the underwater vehicle, the unit is installed on the undamaged section of the pipe 6. After the saddles 5 of the unit take their position on the pipe 6, the hydraulic cylinders 13 are actuated by the manipulator of the underwater device using the corresponding lever 11 on the distributor 10. as the grippers 3 pressed the pipe 6 to the saddles 5, the unit is rigidly fixed to the pipe. The end of the pipe will have torn and deformed edges that need to be cut, for which the saw 39 is turned on, and at the end of this operation it is set to its original position.

The hydraulic cylinder 16 is turned on, and the tables of the nodes A and B with the stops 36 and 37 are fixed in one plane, and the pipe 6 and the coupling 34, valves 28 will be located on the same axis. After turning on the hydraulic cylinder 24, it begins to move towards the pipe 6, and the guide rods 22 and the sliders 23 interacting with them will not allow the hydraulic cylinder to deviate from the center line. Moreover, the valve 28 is in the open state, so the oil stream exiting the pipe 6 freely passes through it and leaves the windows 33 on the pipe 31. The coupling 34, the valve 28 fits on the pipe 6 until it stops, and the glands tightly fit the outer wall of the pipe. Moreover, due to the possibility of scratches and marks on the pipe, several glands are installed in the coupling. After this operation, the actuator 29 of the valve 28 is turned on. The locking device blocks the passage in the valve, the oil exit from the pipe 6 stops, and the seals seal the gap between the outer wall of the pipe 6 and the coupling 34. High pressure in the pipe will try to move the valve 28, but the hydraulic cylinder 24 will hold it securely in place.

Claims (4)

1. A hydraulic shut-off unit for oil emergency subsea wells, consisting of two nodes A and B, interconnected by hinges, and node A has a table in the form of a steel plate, on which is placed an electric motor, oil pump, oil tank and distributor with control levers, the hinge associated with the hydraulic cylinder, the rod of which is connected to the hinge of the table of the node B, the table is made in the form of a steel plate with the possibility of rotation of one node relative to another by 90 °, characterized in that the node A additionally has a hydraulic locking cotton wool, located between each of two pairs of metal brackets, 90 ° welded to the table, in its lower part, on both sides, driven by hydraulic cylinders connected to the table and grips with hinges, and in each bracket there are conical cutouts that end with a pipe saddle made in the form of a semicircle, and between the extreme bracket and the stop, perpendicularly welded to the table, there is a shaft on which the cutting mechanism is located - a saw, and two brackets are welded to the table of assembly B at right angles, between which there are two guide rods parallel to the table along which the sliders of the hydraulic cylinder move, the rod of which is connected to the hinge of the rear bracket, there is a flange at the end of the hydraulic cylinder, to which the crosswise flange of the valve with a mechanical drive is attached using bolts, and a coupling is located in front of the valve, and stuffing boxes seals inside it, and the saddles of the brackets and the coupling of the gate valve are aligned. 2. The hydraulic locking unit according to claim 1, characterized in that the hydraulic grippers are placed between two pairs of brackets perpendicularly welded to the table, the grippers are connected to the brackets using hinges and are located in their lower part, on both sides, with the ability to make movements, driven by hydraulic cylinders connected to the grippers and the table using hinges, and the working part of the grippers is made under the diameter of the emergency pipe. 3. The hydraulic locking unit according to claim 1, characterized in that the saw is a mechanism consisting of a body, a working body (cutting part), a drive and a reducer installed between the extreme bracket and the stop of the assembly A with the ability to cut off the deformed end of the pipe drive can be either electric or hydraulic, and the saw is installed in a design that is most suitable for working in these conditions. 4. The hydraulic locking unit according to claim 1, characterized in that the valve is a mechanism consisting of a housing, inside of which a locking device is located, with the ability to block the passage in the housing, driven by an electric or hydraulic actuator and gearbox, the outlet of the valve is a pipe with a cross-shaped flange, and windows in them, and at the entrance to the valve there is a coupling made in the form of a cylinder, inside of which stuffing box seals are installed, and in the working position agr gata valve sleeve and tube are coaxial captured.

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