Accumulation sampling device

FIELD: oil and gas industry, particularly obtaining fluid samples or testing fluids in pipelines.

SUBSTANCE: device comprises pipeline, body made as connection pipe with hollow shaft and cock. Hollow shaft is fixedly connected to pipeline in air-tight manner and is made as connection pipe with beveled end and radial orifices facing liquid flow made in shaft side opposite to that provided with beveled end. Pipeline has restriction located downstream of the shaft. Another end of connection pipe is air-tightly connected to pipeline downstream of the restriction and located in decreased pressure zone. Connection pipe section defined by cock and the second end is provided with cylindrical case with piston, which may slide in axial direction with respect to the case. The case has discharge connection pipe arranged from cock side. The piston comprises valve providing liquid flow from the cock side. The cock is made as a cylinder with electromagnet and shaft air-tightly installed in the cylinder and sliding with respect to the cylinder in axial direction by means of electromagnet. Cylinder has outlet connection pipe and is communicated with discharge connection pipe. Both connection pipes are closed with shaft. The shaft has two annular grooves. The first groove may communicate connection pipe with cylinder to seal the connection pipe as shaft moves inside the cylinder. The second groove may communicate outlet and discharge connection pipes as shaft slides inside the cylinder.

EFFECT: increased sample taking quality.

1 dwg

 

The invention relates to the production, collection, preparation and transport of liquid and gas products and can be used on oil and gas production, refining, transportation or other enterprises where the work is carried on sampling of liquids from pipelines.

Famous sampler and method of sampling fluid (RF patent No. 2157889, IPC 7 EV 49/08, G012N 1/10, publ. in bull. No. 29 dated 20.10.2000,), comprising a housing with a cavity for accumulating the liquid phase with a lid at the bottom of the filtering device and the discharge device, the housing of the sampler is rigidly mounted on the outside bottom of the pipe or technological device, the filtering device mounted inside the housing between the cavities of the pipeline and the sampler completely overlapping section, providing their hydrodynamic message and discharge device is mounted on the fitting rigidly mounted on the body of the sampler at the bottom of the cavity of the sampler.

The disadvantages of this device are:

first, take samples have distorted the composition, because the body of the sampler is located below and in fluid flow through the pipeline is its stratification, while in the case are mostly heavier fraction in the liquid at the bottom, while the lighter fractions of the fluid, u is defined above, pass the body of the sampler;

secondly, when fluid flow through the pipeline filter device located inside the housing hammered mechanical impurities, and therefore for sampling must be regularly cleaned, and this requires constant monitoring.

Known sampling device (RF patent for useful model №40391, IPC 7 EV 49/08, F17D 3/10, publ. in bull. No. 25 dated 10.09.2004,), through its installation on the main pipeline and is made in two sections attached to the main pipe by means of flange connections, and are provided with adjustable three-way ball valves, selected valve and pressure gauge, with three-way ball valve shaft connected with the control lever with the flexibility to cut one of the sections, and each section is arranged to pass the entire flow of fluid, and one of the sections is the bypass, and the other sample (measured) sample coverage of the cross-section of the fluid flow without losses.

The disadvantages of this device are:

first, the design complexity, due to the large number of parts and components, as well as the complexity and intensity;

second, with frequent sampling of items selected valve wear out and it loses its integrity, in connection with the eat reduced service life of the device as a whole and requires a revision of the sealing elements selected crane or replacement.

The closest in technical essence is the sampler (RF patent for useful model №47971, IPC 7 EV 49/08 A, G01N 1/10, publ. in bull. No. 25, 10.09.2005, containing tubing, casing in the form of pipe welded to the pipe, and a hollow stem with valve, with a hollow stem connected to the housing rigidly and hermetically sealed and executed in the form of a pipe smaller than the pipe cross-section with beveled end, rests on the diametrically opposite side from the mounting housing, and radial holes which are placed against the fluid flow, while the cut beveled end is placed on the opposite radial side holes of the hollow stem.

The disadvantages of this sampler are:

first, the low quality of the sampling, since the housing is welded to the pipe from below and above the valve forms a settling zone, where they can accumulate the heavier components of the fluid, which displace more light, and at the moment of opening of the valve (sampling) they fall into the container, which negatively affects the quality of the selected sample;

secondly, is only momentary sampling, in which it is difficult to judge composition selected fluid, because there is no constant volume of the selected sample.

The objective of the invention is to improve the quality of sampling in the possibility of accumulation of samples of a specific size.

The technical problem is solved by the proposed sampler is cumulative, containing tubing, casing in the form of a nozzle with a hollow stem and a valve rigidly and tightly connected to the pipeline, while the hollow stem is made in the form of a pipe with beveled end and radial holes which are placed against fluid flow from the opposite edge beveled end side of the hollow rod.

What is new is the fact that the pipeline for hollow stem in fluid flow equipped with a contraction, and the second end of the pipe is tightly connected to the pipeline for its narrowing in the area of low pressure, and the pipe between the valve and a second end with a cylinder housing with a piston made with the possibility of axial movement relative to the shell, which from the side of the valve is equipped with a drain pipe, and the piston has a valve to allow fluid from the valve, which is made in the form of a cylinder with solenoid and rod inserted tightly in the cylinder for axial movement by means of an electromagnet, while the cylinder is additionally equipped with exhaust pipe and communicated with a drain pipe that is blocked by the rod, and the rod is equipped with annular grooves, the first of which is arranged to messages hollow rod and overlap it with peremeshany the rod in the cylinder, and the second - message drain and outlet pipes when moving rod in the cylinder.

The drawing shows the proposed sampler is cumulative in a longitudinal incision in the original position.

The sampler cumulative contains the pipeline 1, the body in the form of a pipe 2 with a hollow shaft 3 and the valve 4. The hollow rod 3 is rigidly and tightly connected to the pipeline 1, and the hollow rod 3 is made in the form of a pipe with beveled end 5 and the radial holes 6, which are placed against fluid flow from the opposite edge beveled end 5 side of the hollow rod 3.

The pipeline 1 for hollow shaft 3 through the fluid flow is equipped with a constriction 7. The second end 8 of the socket 2 is hermetically connected to the pipeline 1 for its narrowing of 7 in the area of low pressure.

The pipe 2 between the valve 4 and the second end 8 is fitted in a cylindrical casing 9 with the piston 10, is made with the possibility of axial movement relative to the cylindrical casing 9, which side of gate 4 is supplied with a drain pipe 11.

The piston 10 has a valve 12, which transmits fluid from the valve 4. The valve 4 is made in the form of a cylinder 13 with the electromagnet 14 and the rod 15 inserted tightly in the cylinder 13 with the possibility of axial movement by means of the electromagnet 14.

The cylinder 13 is additionally equipped with exhaust Petruk the m 16 and is communicated with the drain pipe 11, covered by the rod 15. The rod 15 is equipped with annular grooves 17 and 18. Annular groove 17 of the shaft 15 is arranged to message pipe 2 with the cylinder 13 and tight shutoff of the nozzle 2 when moving rod 15 in the cylinder 13, and the annular groove 18 of the rod 15 with the possibility of messages the drain 11 and the outlet 16 of the nozzles while moving the rod 15 in the cylinder 13.

To prevent unauthorized overflows of liquid paired surfaces of the parts installed o-rings 19 and 20.

The sampler cumulative works as follows.

The liquid flow moves only through the pipeline 1, for example, from left to right (see drawing) through the constriction 7. In the initial position, the piston 10 is located in the lower part of the cylindrical casing 9 and below apart in his step sample 21 limiting the movement of the piston 10 downward.

The fluid flow moving through the pipeline 1 and reaching the hollow rod 3, is divided into two streams. The first thread continues to move through the main pipe 1 and through the constriction 7 moves further in the pipeline 1 in the connection zone of the second end 8 of the pipe 2 pipe 1 at its constriction 7, an underpressure is created.

In this regard, the second fluid flow through the radial holes 6 enters the hollow shaft 3 and pipe 2 through the ring FR is CCU 17 of the stem 15 of the valve 4 is supplied to the inside of the cylindrical casing 9, filling the inner space of the latter, since the end of the discharge pipe 11 is hermetically covered by the stem 15 of the valve 4, while the piston 10 is stationary relative to the cylindrical casing 9.

As the filling of the internal space of the cylindrical casing 9, the fluid flow acting on the valve 12 from above through the top hole of the piston 10 due to the weight of the accumulated fluid in the inner space of the cylindrical casing 9 above the piston 10, perelavlivaet valve 12 downward, the latter opens and tells you over and podpisniye area piston 10, thus there is a first fluid under the piston 10 has a cylindrical casing 9, and then through the second end 8 of the socket 2 in the pipe 1 at the constriction 7.

Thus, there is movement of fluid in both directions, as noted above, in connection with which the liquid (sample) in the internal space of the cylindrical casing 9 is constantly updated. The volume of the internal space of the cylindrical casing 9 is selected in advance, depending on sample volume and sets the dimensions of the cylindrical casing 9.

For assaying serves voltage at the poles of the electromagnet 14 of the valve 4, which pulls through the rod 15, that is, moves the rod 15 to the right relative to the cylinder 13. Retraction is electromagnetism 14 of the rod 15 is until until the annular groove 18 of the shaft 15 will not create a hydraulic connection between the drain 11 and the outlet 16 pipes, the pipe 2 is sealed overlaps the stem 15 of the valve 4, that is, the annular groove 17 of the rod 15 moves to the right, the result will terminate the flow of fluid from pipe 1 to pipe 2 in the inner space of the cylindrical casing 9.

Since the lower end of the exhaust pipe 16 is connected with the atmosphere above the piston 10 in a cylindrical casing 9 is formed atmospheric pressure, and under the piston 10 to a pressure equal to the fluid pressure in the pipe 1, and due to the pressure difference above and below the piston 10 of the latter begins to move upward, displacing the collected sample from the inner space of the cylindrical casing 9 above the piston 10, with cumulative sample through the drain channel 11 through the annular groove 18 and the discharge port 16 merges into a special container 22.

After draining the accumulated samples of the piston 10 returns to its original position (see drawing), and then served a reverse voltage at the poles of the electromagnet 14, resulting in a reverse move (left) rod 15 relative to the cylinder 13 and the piston rod 15 is the initial position, that is, the annular groove 18 of the rod 15 is hermetically covered by the cylinder 13 of the valve 4, and the annular groove 17 hydraul the Cesky reports the pipe 1 through the pipe 2 with the inner space of the cylindrical casing 9.

When the fluid flow is directed into the interior of the cylindrical casing 9 above the piston 10 and moves the latter against the stop in a stepped sample 21 of the cylindrical casing 9.

Thus, the sampler cumulative occupies the initial position and is ready for reuse.

The proposed sampler cumulative improves quality sampling due to the lack of settling zones and continuous updating of the sample due to the motion of selected fluid flow, and the possibility of accumulation of sample specific volume gives a more objective assessment of component composition of selected samples.

The sampler is cumulative, containing tubing, casing in the form of a nozzle with a hollow stem and a valve rigidly and tightly connected to the pipeline, while the hollow stem is made in the form of a pipe with beveled end and radial holes which are placed against fluid flow from the opposite edge beveled end side of the hollow rod, characterized in that the pipe for a hollow stem in fluid flow equipped with a contraction, and the second end of the pipe is tightly connected to the pipeline for its narrowing in the area of low pressure, and the pipe between the valve and a second end with a cylinder housing with a piston which has a capability OS the first movement relative to the casing, which side of the valve is provided with a drain pipe, and the piston has a valve to allow fluid from the valve, which is made in the form of a cylinder with solenoid and rod inserted tightly in the cylinder for axial movement by means of an electromagnet, while the cylinder is additionally equipped with an outlet tube and communicated with the drain pipe that is blocked by the rod, and the rod is equipped with annular grooves, the first of which is arranged to messages hollow rod and overlap it with the moving rod in the cylinder, and the second with messages drain and outlet pipes when moving rod in the cylinder.



 

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