RU130032U1 - DEVICE FOR REPAIR OF AN EXISTING PIPELINE WITHOUT ITS OFF - Google Patents

Abstract

1. A device for repairing an existing pipeline without shutting it off, comprising valves mounted on the pipeline with starting chambers, including telescopic cylinders with conductors, pressure valves to the cylinder, hose cables, characterized in that it is additionally equipped with a bypass line in the form of a flat-rolled sleeve with valves , handles with stuffing box seals, threaded rods, magnets and plugs, pressure relief valves. 2. A device for repairing a pipeline according to claim 1, characterized in that the hose cables are equipped with nitinol sealant packers capable of changing their shape by heating the veins of the hose cables.

Description

The inventive utility model relates to the oil industry, namely, devices for repairing an existing pipeline without shutting it down.

Known methods for repairing damage to pipelines, in which it is necessary to disconnect and release the disconnected sections from the pumped product. When emptying the pipeline there is a loss of the pumped product, environmental pollution; the pumped water is not collected at all, but discharged from the pipeline. At large distances between the secant valves, large losses occur in the pumped product.

Mustafin F.M., Bykov L.I. and other field pipelines and equipment. - Moscow, 2004.

A device for inspection and repair of pipelines is known, which is a robotic complex containing means for moving, securing, inspecting and repairing sections of the pipeline, the complex being equipped with the ability to move the flow energy in the pipeline due to two toroidal elastic elements located on the robot complex in front and behind upstream, and has a flexible pipe that is tightly connected to the toroidal elastic elements, (application No. 2009120424 of 05/05/2009 IPC F16L 55/18) This technical solution is its complexity and complexity of application.

There is a method of repairing damage to existing pipelines without shutting them down, including pipelines with through damage, repair equipment and tools, repair is carried out on the damaged area, which is disconnected at the repair site using flexible sealing diaphragms filled with air to shut off the flow, without stopping the operation of the pipeline during transportation product bypass line (application No. 2007122216 from 06/13/2007 g IPC F16L 1/00) However, this repair method does not provide devices for twisting ears in the welded pipe - "Spanish Flu", which reduces the reliability of the repair work, as well as the inability to use the equipment repeatedly.

The technical solution "Device for cleaning the inner surface of pipelines" using a mini-tubing mobile unit with a flexible pipe with a cleaning nozzle, equipped with a valve mounted on the pipeline with a starting chamber, a hydraulic cylinder with a conductor, a cylinder for supplying pressure to the cylinder is known (Application No. 2011112727 from 04.10.2011 g IPC B08B 9/04) (prototype).

However, the equipment that the proposed device is equipped with can actually be used to repair damage to existing pipelines without shutting them down, equipping with additional tools.

The task, which the real utility model is aimed at, is to create reliable, economical and mobile domestic equipment - a device for repairing a pipeline without shutting it down, for reusing all equipment (up to a million operation cycles).

The technical result is achieved by the fact that in the proposed device for repairing the pipeline without shutting it off, it contains valves mounted on the pipeline with starting chambers, telescopic cylinders with conductors, valves for supplying pressure to the cylinder, hose cables, according to the utility model, are additionally equipped with a bypass line - in the form of a flat-rolled sleeve, with valves, handles with stuffing box seals, threaded rods, magnets and plugs, pressure relief valves, hose cables equipped with threads tin sealer-packers, the ability to change its shape hoses cables lived by heating.

Figure 1 shows the proposed device for repairing an existing pipeline without shutting it down.

Figure 2 shows a device for installing plugs.

A device for repairing an existing pipeline without shutting it off contains valves mounted on the pipeline 1 with starting chambers 2, including telescopic cylinders 3 with conductors 4, valves for supplying pressure 5 to the cylinder 3, hose cables 6, equipped with nitinol sealants-packers 7, the bypass line - in the form of a flat-rolled sleeve 8, with valves 9, handles 10 with stuffing box seals 11, rods with thread 12, magnets 13 and plugs 14, pressure relief valves 15.

The proposed device operates as follows:

A wall thickness is measured at the intended location of the side insets under pressure and a conclusion is made on the suitability of the site for work. After a positive conclusion, welding works on installation of pipes ("Spanish women") with flanges pre-welded to them for fastening the gate valves 9 are carried out in these areas. The next step is to install locking valves on the welded "Spanish women", after which two cold insert installations (UHV ) and two taps into the pipeline under pressure, for mounting the bypass line, which is a flat-rolled sleeve 8, consisting of a woven frame enclosed in an elastomeric polyurethane.

The frame is made on circular knitting machines from high strength polyester yarns and has a seamless tubular design. In the production process of flat-rolled sleeve 8, the frame is passed through an extruder, in which it is coated on both sides with polyurethane. Polyurethane fills the entire space between the threads of the frame, as a result of which the flat-rolled sleeve 8 turns out to be solid and layerless. The frame provides a high working pressure of the sleeve 8, and polyurethane provides resistance to corrosion, wear resistance, oil and oil resistance, resistance to chemical, physical, bacterial effects, erosion, hydrolysis and ultraviolet radiation. The length of one coil of a flat-rolled sleeve 8 is 200 m. If it is necessary to construct a bypass line of more than 200 m, then flat-rolled sleeves 8 are interconnected by a quick disconnect connection. At the ends of the flat sleeves 8 there is a connecting element with a gasket, which is connected to the valve.

Next, the installation of two pipes "Spanish", valves 1, on both sides of the place of damage to the pipeline and two cuts under pressure UHV. After tapping, the UHV is dismantled and launch chambers 2 are mounted in its place, mounted on valves 1. The launch chamber 2 contains a telescopic (telescopic) cylinder 3 with a conductor 4, and a hole is drilled to install a pressure supply valve 5 to cylinder 3. Conductor 4 represents two rollers connected among themselves by metal plates and fixed to a hydraulic cylinder. This device has a limiter, on the opposite side to the attachment to the hydraulic cylinder, used when lowering the device into the pipeline cavity to fix one of the rollers on the sharp edge of the left UHV. After installing two launch chambers 2, nitinol sealants-packers 7 are introduced into the cavity of the pipeline, which are a hollow metal cylinder on the outer surface of which a helical spring made of nitinol is installed. The nitinol sealant-packer 7 has a threaded connection for connection to a hose-cable 6, the diameter of which is from 30 mm to 70 mm. Nitinol sealant-packer 7 is enclosed in a polyurethane shell to provide sealing during deformation of the spring. The change in the shape of the spring is associated with the use of a mixture of nickel metals (55%) and titanium (45%) for its manufacture, which corresponds to the formula TiNi. The main advantage of this alloy is the unique property of nitinol to reproduce a given shape when exposed to heat (metal memory). Tightness is achieved by pressing the polyurethane shell by a deforming spring to the inner wall of the pipeline, which allows not to take into account the state of the inner wall of the pipeline.

The first is introduced into the cavity of the pipeline nitinol sealant-packer 7 with a deviation in the direction of flow. After the cylinder 3 has lowered the conductor 4 with the nitinol sealant-packer 7 into the cavity of the pipeline and rejected it in the direction of the fluid flow, it is pushed into the cavity of the repaired pipeline by 10-15 cm. The push is carried out by the injection head (belt conveyor), installed above the stuffing box seal 12 of the launch chamber 2. After pushing through the cores of the hose cable 6, voltage is applied, which causes a change in the shape of the nitinol spring due to heating. The spring expands, thereby pressing the polyurethane shell of the nitinol sealant-packer to the inner surface of the pipeline wall. The pressing area is calculated in the manufacture of nitinol spring. After two devices are installed, the fluid will be pumped through bypass line 8.

At the end of work on cutting the emergency section, and installing a new pipeline in its place, all equipment is dismantled. A device is installed on the gate valve 9 for twisting the plugs into the welded “Spanish woman” with an internal taper thread. After installing the screw plug 14 with a handle 10 with a threaded rod 12 and a magnet 13 with an oil seal 11 and a pressure relief valve 15, the device is disassembled and a plugged counter flange is installed on the plug 14 or the plug 14 is scalded.

This technical solution allows you to make mobile, inexpensive, high-quality repair of any pipelines without stopping, to reduce environmental risks, to carry out work with high efficiency and economy.

Thus, reliable, economical and mobile domestic equipment is used - a device for repairing a pipeline without shutting it down

1. After the replacement of the emergency section, four plugs will remain on the pipeline. In other words, the whole complex of equipment (except for plugs) can be used repeatedly.

2. The use of a nitinol sealant-packer will allow you to block any geometry of the cross-section of the pipeline, whether it is an ellipse or dents, even with deposits on the wall, with the reliability of a metal plug, while the working element can be inserted into the cavity of the working pipeline and also removed from the mobile him for later use. In this method, the pipeline is not sealed by supplying gas or air to the diaphragm chambers - this is a completely different method of sealing on oilfield and process pipelines.

Claims (2)

1. Device for repairing an existing pipeline without shutting it off, comprising valves mounted on the pipeline with starting chambers, including telescopic cylinders with conductors, pressure valves to the cylinder, hose cables, characterized in that it is additionally equipped with a bypass line in the form of a flat-rolled sleeve with valves , handles with stuffing box seals, threaded rods, magnets and plugs, pressure relief valves. 2. A device for repairing a pipeline according to claim 1, characterized in that the hose cables are equipped with nitinol sealant packers capable of changing their shape by heating the veins of the hose cables.

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