RU2269714C2 - Device for closing pipeline filled with oil product - Google Patents

Device for closing pipeline filled with oil product Download PDF

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Publication number
RU2269714C2
RU2269714C2 RU2004106809/06A RU2004106809A RU2269714C2 RU 2269714 C2 RU2269714 C2 RU 2269714C2 RU 2004106809/06 A RU2004106809/06 A RU 2004106809/06A RU 2004106809 A RU2004106809 A RU 2004106809A RU 2269714 C2 RU2269714 C2 RU 2269714C2
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RU
Russia
Prior art keywords
chamber
rod
pipeline
locking
main pipeline
Prior art date
Application number
RU2004106809/06A
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Russian (ru)
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RU2004106809A (en
Inventor
Владимир Михайлович Левагин (RU)
Владимир Михайлович Левагин
Original Assignee
Владимир Михайлович Левагин
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Application filed by Владимир Михайлович Левагин filed Critical Владимир Михайлович Левагин
Priority to RU2004106809/06A priority Critical patent/RU2269714C2/en
Publication of RU2004106809A publication Critical patent/RU2004106809A/en
Application granted granted Critical
Publication of RU2269714C2 publication Critical patent/RU2269714C2/en

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Abstract

FIELD: pipeline transport.
SUBSTANCE: device comprises two closure members provided with flexible closure chambers and rod. The closure chamber of each closure member is mounted on the hollow pressure-tight flexible rod whose inner space receives interconnected vessels filled with inert gas. The ends of the rod are provided with wedging mechanism. The surface of the closure chamber is provided with sealing collars. One of the ends of the rod is provided with sail for permitting folding and unfolding. The first closure member in the pipeline is locked downstream of the section to be dismounted, and the second one is locked upstream of it.
EFFECT: expanded functional capabilities.
7 cl, 3 dwg

Description

The invention relates to techniques for the construction and operation of trunk and local oil pipelines, pumping stations, and is intended for sealing oil pipelines when performing repair and restoration work, for example, when eliminating leaks in a pipeline, replacing its defective sections, replacing shut-off and regulating pipeline valves (valves, valves and etc.), when creating new nodes of connections to the existing oil product pipeline. The proposed device can also be used to shut off the gas pipeline.
A device is known for eliminating accidents at an oil product pipeline containing heat exchangers, a cold source in the form of a cryogenic tank, a heat source in the form of a heat generator, pipelines. This device implements a method in which a damaged section of a pipeline is cut off on both sides by artificially created plugs by freezing the boundaries of this section with liquid nitrogen (RF patent No. 2204078, IPC F 16 L 55/103, 2001).
The use of such a device leads to a violation of the strength characteristics of pipelines in places of their unregulated cooling (usually below -100 ° C), which is below the cold-brittle limit of steel pipes. In addition, ice plugs do not guarantee reliable cutting off of the damaged section of the pipeline.
A device is known for temporarily sealing a pipeline for repair purposes, comprising an inflatable chamber and a rod passed through the pipeline and connected to the chamber, which fixes and guides it when pumped with air (US patent No. 5285806, NPK 137 / 15.08, IPC F 16 K 7/10 , F 16 L 55/124, 1992).
The disadvantage of this device is the possibility of leakage of the product between the inflatable chamber and the inner wall of the pipe.
Known as the closest analogue is a device for closing a product pipeline containing a locking elastic chamber made in the form of a cylinder with reinforced bottoms, an input mechanism in the form of a hollow rod with a movable rod connected by slings to a locking elastic chamber, safety and non-return valves in the bottoms (RF patent No. 2058506, IPC F 16 L 55/16, 1992).
The known device does not provide sufficient sealing and resistance of the locking elastic chamber to the pressure of the oil remaining in the pipeline and with the possible occurrence of pressure shocks in the pipeline. Pipes welded into the pipeline during repair (the required number of at least two in each repaired area) and having a maximum internal diameter of 150 mm according to the operating rules for main oil pipelines do not allow an elastic chamber to be introduced into the pipeline to provide sufficient strength and having control valves. The deployment and filling of such a chamber is very difficult. After entering the camera, a welded coil with a valve and a plug remains on the product pipeline, which is a vulnerability in terms of strength characteristics, as well as the possibility of unauthorized connection to this valve. This is characteristic of all devices using welded nozzles for introducing locking elements. Considerable time is spent both on repair work and on preparatory work.
The objective of the present invention is to remedy these disadvantages, namely: the creation of reliably blocking the pipeline during the repair of the device, reducing the risk of environmental pollution. Another objective of the invention is to reduce the time and complexity of the preparatory and repair work on replacing a defective area without emptying the oil product pipeline.
This problem is solved by the fact that in the device for closing the main pipeline filled with oil containing a locking unit having an elastic locking chamber and a rod, it contains a second locking node, in each of the locking nodes a locking chamber is located on the said rod, which is made hollow, hermetic and elastically deformable, inert gas cylinders are placed inside the rod, interconnected by a hose having exhaust valves for supplying inert gas to the shut-off chamber, at the ends of the rod proppant mechanisms are placed, while sealing cuffs are fixed to the surface of the shut-off chamber, and a sail is fixed at one end of the boom with the possibility of folding and unfolding. The proppant mechanism comprises a fixed sleeve located on the rod and a sliding sleeve, driven by pneumatic or hydraulic cylinders, and pressure shoes connected to the sleeves having studded tread plates and interacting with the pipeline walls. Elastic sealing cuffs and cuffs with a tread pattern and spikes are fixed on the surface of the locking chamber. Cuffs with a tread pattern and spikes are located alternating with elastic sealing cuffs. The locking chamber may be made single-section or multi-section, for example three-section. The sail is made in the form of an umbrella and consists of trapezoidal plates connected at one end to a bar.
The invention is illustrated by drawings. Figure 1 shows the proposed device, inserted into the pipeline with the first locking unit fixed in it and the second non-locked, figure 2 - device with filled elastic locking chambers, figure 3 - section of the pipeline with a wedging mechanism in working condition.
The device for blocking the pipeline 1 consists of two identical locking nodes, each of which contains an elastic inflatable locking chamber 2, which is tightly twisted around a hollow sealed rod 3 and is fixed on it. The locking chamber 2 can be made both single-section and multi-section, for example three-section, each section of which is isolated from the others and in case of damage to one section or even two sections, the third will reliably contain the fluid pressure in the pipeline 1. The rod 3 is made of elastically deforming, for example, polyethylene pipes along the perimeter lined with steel cables with a steel core and top closed with another thick-walled polyethylene pipe. At both ends, the rod 3 has hermetically screwed on the threads of the cover 4. Inside the rod 3 there are steel or plastic inert gas cylinders 5, interconnected by an elastic high-pressure hose 6 having exhaust valves 7 through which inert gas is supplied to the elastic shutoff a chamber 2, also having exhaust valves 8 according to the number of sections of the locking chamber 2. At the ends of the rod 3 there are proppant mechanisms 9 for rigidly securely locking the locking chamber 2 inside the pipeline 1. Each wedge The sliding mechanism 9 comprises a stationary sleeve 10 located on the rod 3, a sliding sleeve 11, driven by pneumatic or hydraulic cylinders 12. Grooves are made in the sliding sleeve 11, and it can be moved along the guide rods 3. Pressure shoes are connected to the sleeves 10 and 11 13 having studded tread pads 14, for example, from the tread portion of a tire. Supporting rollers 15 are located at the ends of the pressure shoes 13 near the hinge joint, which facilitate smooth and unhindered advancement of the rod 3 inside the pipeline 1. On the surface of the locking chamber 2, elastic sealing cuffs 16 made of polyurethane or porous rubber and cuffs 17 with a tread pattern and spikes are fixed. It is preferable to arrange the cuffs 16 and 17 in alternating order. A sail 18 is fixed at one end of the rod 3, which has the ability to open and close like an umbrella using a sliding sleeve 19 and pneumatic or hydraulic cylinders 20, mounted on a fixed sleeve 10. The sail 18 consists of trapezoidal plastic plates connected at one end to the rod 3 Sail 18 is designed to advance the rod 3 with the locking chamber 2 in the direction of pumping oil. The speed of advancement of the locking node of the device can be controlled by the degree of disclosure of the sail 18.
Before using the device, preparatory operations are carried out: a trench is dug at the place of replacement of the defective section of the pipeline 1. A coil 21 is welded in the center of this section, a valve 22 is installed, and a hole is made in the pipeline 1 in a known manner without stopping the pumping of oil. After that, or simultaneously with the installation of the coil 21 at the borders of the dismantled section of the pipeline 1, sensors are installed on both sides that will signal the passage of the locking nodes of the device.
The proposed device operates as follows.
The first locking unit of the device through the receiving chamber on a linear valve is launched into the pipeline 1 in the direction of pumping the oil product, before that, the degree of opening of the sail 18 is regulated depending on the speed of the oil flow and the necessary speed of movement of the first locking unit of the device. The locking unit may be equipped with a beacon, which signals during the movement of the locking unit in the oil stream in order to determine its location at any time. When a sensor located behind the disassembled section passes from a remote control or a signal is automatically sent to sensors located in the cavity of the rod 3, giving a command to actuate the pneumatic or hydraulic cylinders 12 and 20. The pneumatic or hydraulic cylinders 12 and 20 are triggered simultaneously. Thus, the first locking unit of the device is reliably fixed by the proppant 9 in the calculated place outside the area to be removed, at the same time the sail 18 is folded, tightly pressing the plates to the surface of the rod 3, without interfering with the pumping of the oil product. In the same way, a second locking unit of the device is inserted into the pipeline 1, which is fixed in the calculated place in front of the boundary of the area to be dismantled. After fixing both shut-off units, a command is given to stop pumping the oil product, the linear valves are closed, the pressure in the pipe 1 is relieved. Then, a signal is sent from the remote control to the sensors giving a command to open valves 7 to fill the chambers 2 of both shut-off units with compressed inert gas from cylinders 5 under design pressure. The reliability of the connection of the shut-off chambers 2 with the inner surface of the pipeline 1 is enhanced by elastic sealing cuffs 16 and especially by the cuffs 17 with a tread pattern and spikes, which push through the layer of paraffin and other tarry deposits on the inner walls of the pipe 1, which interfere with the reliable connection of the shut-off chambers 2 s the inner surface of the pipeline 1. When using three-section locking chambers 2, the reliability of the seal is further enhanced. Thus, the dismantled section is overlapped and reliably isolated. An oil product is pumped out through a valve 22 into a prepared elastic tank or tank truck, which can again be pumped into a pipeline 1 behind a linear valve. After replacing the defective section of the pipeline 1 with a new coil, a signal is issued from the remote control to release pressure in the pneumatic or hydraulic cylinders 12 of the proppant 9 and in the shut-off chambers 2 through their exhaust valves 8. The contact with the inner surface of the pipeline 1 ceases, and after the linear valves are opened and the beginning of the pumping of the oil product, both shut-off units of the device are pushed by the oil product flow to the linear valve, where they are dismantled from the pipeline 1 through the receiving chamber.

Claims (8)

1. A device for shutting off a trunk pipeline filled with oil, containing a locking assembly having an elastic locking chamber and a rod, characterized in that it comprises a second locking assembly, in each of the locking assemblies a locking chamber is located on said rod, which is hollow, sealed and elastically deformable, inert gas cylinders are placed inside the rod, interconnected by a hose having exhaust valves for supplying inert gas to the shut-off chamber, at the ends of the rod there are open NIWA mechanisms, thus on the surface of the locking chamber fixed seals, and at one end of the rod is secured sail having the possibility of folding and unfolding.
2. The device for shutting off the main pipeline according to claim 1, characterized in that each wedging mechanism comprises a stationary sleeve and a sliding sleeve, which are driven by pneumatic or hydraulic cylinders, and pressure shoes connected to the sleeves having studded tread plates and interacting with the walls of the pipeline.
3. The device for closing the main pipeline according to claim 1, characterized in that on the surface of the shut-off chamber, elastic sealing cuffs are fixed.
4. The device for closing the main pipeline according to claim 1, characterized in that cuffs with a tread pattern and spikes are fixed on the surface of the shut-off chamber.
5. The device for closing the main pipeline according to claim 1, characterized in that the cuffs with the tread pattern and the spikes are arranged alternating with elastic sealing cuffs.
6. The device for closing the main pipeline according to claim 1, characterized in that the shut-off chamber is made single-section.
7. The device for shutting off the main pipeline according to claim 1, characterized in that the closure chamber is multi-sectional, for example three-sectional.
8. The device for closing the main pipeline according to claim 1, characterized in that the sail is made in the form of an umbrella and consists of trapezoidal plates connected at one end with a rod.
RU2004106809/06A 2004-03-09 2004-03-09 Device for closing pipeline filled with oil product RU2269714C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU2004106809/06A RU2269714C2 (en) 2004-03-09 2004-03-09 Device for closing pipeline filled with oil product

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU2004106809/06A RU2269714C2 (en) 2004-03-09 2004-03-09 Device for closing pipeline filled with oil product

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RU2004106809A RU2004106809A (en) 2005-08-20
RU2269714C2 true RU2269714C2 (en) 2006-02-10

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU181952U1 (en) * 2018-02-01 2018-07-30 Герман Евгеньевич Ткачев In-pipe overlap
RU189934U1 (en) * 2019-02-14 2019-06-11 Федеральное государственное бюджетное образовательное учреждение высшего образования "Уфимский государственный нефтяной технический университет" Intra tube overlapping device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU181952U1 (en) * 2018-02-01 2018-07-30 Герман Евгеньевич Ткачев In-pipe overlap
RU189934U1 (en) * 2019-02-14 2019-06-11 Федеральное государственное бюджетное образовательное учреждение высшего образования "Уфимский государственный нефтяной технический университет" Intra tube overlapping device

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Publication number Publication date
RU2004106809A (en) 2005-08-20

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MM4A The patent is invalid due to non-payment of fees

Effective date: 20060310

MM4A The patent is invalid due to non-payment of fees

Effective date: 20060310

RZ4A Other changes in the information about an invention