Device for sampling

 

The invention relates to the oil industry, in particular to devices for sampling of high pressure pipelines, and can be used to control the processes of production, preparation, transportation and storage of oil, oil products and gas, regardless of their rheological properties and the ambient temperature, providing them with high reliability. Device for sampling includes a housing with a drain hole, fitted with a lid, inlet and outlet tube with holes, a rotor rotatably around the axis. The lid has a profiled Cam. Tube made in the form of a base plate with two holes - input and drain. In the drainage hose is installed shut-off valve, connected with a drain hole in the housing. The rotor is located between the lid and the tube and mounted on the tube so that the interface of the rotor and the tube forms a mechanical seal. The rotor is constructed in the form of a revolving drum with sample chambers arranged parallel to the axis of rotation. The sampling chamber is cylindrical with Windows placed on top of the camera. Each chamber has a piston. The technical result is for the project for a device. 4 Il.

The proposal relates to the oil industry, in particular to devices for sampling of high pressure pipelines, and can be used to control the processes of production, preparation, transportation and storage of oil, oil products and gas, regardless of their rheological properties and the ambient temperature, providing them with high reliability.

Known automatic sampler (see and.with. The USSR №1275259 from 05.03.85,, G 01 N 1/10, publ. BI No. 45 in 1986), comprising a housing in which is situated a piston rod, a sampling probe with a reservoir chamber that is installed in the pipe, a sealed container, the drive and the software device, the sampler is equipped with a circulating chamber made a channel for returning the liquid in the pipeline and channel of communication with the manifold chamber, the compensator pressure and temperature, and a reservoir chamber located inside the sampling probe symmetrically with respect to the channels and points of sampling.

The advantage of an automatic sampler is that when using it increases the reliability and quality choose the activity and the quality of the selected sample is not guaranteed, as the sample enters the liquid over the entire cross-section of the thread, but only from areas where the channels of the probe, and at different viscosities and densities of the components of the multiphase flow, the components included in the sample is disproportionate to their actual content in the stream.

In addition, at negative ambient temperatures requires the use of additional devices to prevent freezing of the samples, and the elements of the device.

It is also known a device for sampling a stream of the mixture (see and.with. The USSR №1275262 from 23.07.85,, G 01 N 1/18, publ. BI No. 45 in 1986), comprising a housing with inlet and outlet nozzles, flanges and sampling element, equipped with a camera placed in her liner with screw holes, and the sampling element is designed as a circular system of the separation channels of equal diameter, one of which is for sampling, and the number of separation channels sampling element is equal to the number of screw holes of the insert.

The advantage of this device is that simple enough constructive implementation of the reliability of the samples taken for analysis that satisfies the requirements.

The closest in technical essence and the achieved result to the intended device for sampling is the mouth of the sampler (see and.with. The USSR №1067209 from 27.09.82,, E 21 In 49/08, publ. BI No. 2 of 1982), comprising a housing with drain holes, inlet and outlet tube with a hole and a sample chamber provided with drain holes, while the sampler is equipped with a rotor mounted between the tube and the housing for rotation around the tube, and the tube is fixed relative to the housing, and the rotor holes, two of which are communicated with the inlet and outlet nozzles, and the sample chamber is limited by the walls of the casing and the tube walls and the other two holes of the rotor.

The advantage of this device is that it improves the quality and reliability of selected samples due to the fact that the sample is selected from all flow across the section of the transporting pipeline.

The disadvantage is that the accuracy of the sample is reduced due to incomplete sample from the sample chamber, for example at elevated Vya is here operating wellhead sampler, since at low temperatures is freezing the samples, and drain.

Design feature of the known device is the presence of only one chamber for storing sampled, which complicates the work at negative ambient temperatures, so as to store a larger number of samples requires additional heated sealed container.

The technical objective of the proposed device for sampling is to increase the reliability of selected samples, regardless of the physico-chemical composition of the transported via pipeline environment, by ensuring its full drain, increasing the reliability of operation at low ambient temperatures due to the placement of cameras to store samples in the flow of the transported medium, as well as reducing the complexity of operation of the device.

The goal of the project described is achieved by a device for sampling, comprising a housing with a drain hole, inlet and outlet tube with holes, a rotor rotatably around the axis.

What's new is that the casing is further provided with a lid, which has p is in the drainage hose is installed shut-off valve, connected with the drain hole in the housing. The rotor is constructed in the form of a revolving drum with sample chambers has a cylindrical shape with Windows placed in the upper part. The camera parallel to the axis of rotation of the rotor. The rotor is located between the cover and base plate and mounted on the support plate so that it forms with her face seal. Each chamber has a piston, which is in the upper position interacts with profiled Cam and the lower support plate.

Analysis of the known technical solutions from available sources of patent and scientific literature leads to the conclusion about the absence of these signs, similar to the distinctive features of the claimed object, i.e. the compliance of the proposed technical solution the criterion of “inventive step”.

In Fig.1 shows a device for sampling - General view.

In Fig.2 is a cross section along a-a of Fig.1.

In Fig.3 is a section along b-B of Fig.1.

In Fig.4 - view In Fig.1.

Device for sampling includes a housing 1 (see Fig.1) with drain hole 2, provided with a cover 3, input 4 and output 5 tubes, tube 6 with holes 7 and 8 (see Fig.3), the rotor 9 to rotate around the axis 10. On the cover is installed profilerviewer the hole 8 is installed shut-off valve 12, connected with the drain opening 2 in the housing 1. The rotor 9 is located between the cover 3 and the tube 6 and is mounted on the tube 6 so that the interface of the rotor 9 and the tube 6 forms a mechanical seal 13. The rotor 9 is made in the form of a revolving drum with sample chambers 14 (see Fig.1, 2) arranged parallel to the axis of rotation 10. The sampling chamber is cylindrical, with Windows 15, placed at the top of the camera. Each chamber has a piston 16.

The design of the proposed device provides a complete discharge of the selected sample in the container due to installation into the sample chamber of the piston 16, thereby increasing the reliability of the samples. The location of the rotor 9 with sample chambers inside the housing 1 provides equality of temperature and pressure selected samples and flow of the transported medium and thus prevents the freezing of the samples at negative ambient temperatures. In addition, the installation of the shut-off valve 12 in the tube 6 prevents it from freezing, which enables the operation of the device at low temperatures without an additional heating. As the number of cameras is more than one, then a possible way of operating, in which is is sampling, and only when necessary to transport samples to the laboratory, which simplifies the operator's work. The number of sample chambers (on the accompanying drawings shows the performance with four cameras) can be large and is limited only by the overall size of the device.

The set of distinctive features can improve the accuracy sampling, reliability and reduce the complexity of sampling.

Device for sampling works as follows.

The device is mounted on the transporting pipeline, which passes through the fluid flow. The working medium passing through the pipeline enters the inlet pipe 4, then in case 1. Then, through the hole 7 in the tube 6, the working medium passes into one of the sample chambers 14 of the rotor 9. Acting on the piston 16, the working medium flow raises it until it stops in the Cam 11 and flows out through the window 15 in the wall of the sample chamber 14 of the rotor 9. The entire volume passing through the pipeline working medium passes through one of the chambers 14 of the rotor 9. Then the flow of the working fluid flows around all sides of the rotor and enters the outlet 5 and later in transporting pipeline. For sampling rotate the rotor 9 nahodivshayasya above the hole 7 of the tube 6, moves around the circumference and is closed by the surface of the tube. At the same time the piston 16 under the action of the Cam 11 moves down and closes the window 15. The flow of the working medium takes place at this time through the next chamber of the rotor 9 to rotate above the drain hole 8. The collected sample stored in the sample chamber 14 of the rotor 9, the closed top of the piston 16 and the lower end seal 13. For selection of the following samples is necessary to rotate the rotor. The greatest number of samples stored in the sampler is determined by the number of the sampling chambers 14 of the rotor 9. If necessary, samples are merged into a portable container with a shut-off valve 12, with the piston 16 in the chamber above the drain hole 8, pushes the selected sample entirely independently of viscosity.

Industrial tests were conducted of a sample of the proposed device have shown that when sampling viscosity up to 5·10-4m2/s when ambient temperatures from -35 to +20°With the reliability of the samples was ±2.4% compared to ±10% of the prototype and the test time (30 days) is not detected the failure of the proposed device for sampling because of freezing to the bone during the operation of the device by reducing the time required for sampling.

Technical and economic efficiency of the proposed device for sampling the sum due to the increase of reliability of sampling, reliability, and by reducing the complexity of use.

Claims

Device for sampling, comprising a housing with a drain hole, inlet and outlet tube with holes, a rotor rotatably around the axis, wherein the housing is further provided with a lid, which has a profiled Cam and tube made in the form of a base plate with two holes for the input and the drain, and the drain hole installed shut-off valve, connected with a drain hole in the housing, with the rotor mounted on the tube so that it forms with it a mechanical seal and is made in the form of a revolving drum with sample chambers has a cylindrical shape, located parallel to the axis of rotation of the rotor, in the upper part of which is made open, each chamber has a piston, which is in the upper position interacts with profiled Cam, and at the bottom with the tube.



 

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