RU135716U1 - WELL PRODUCT SAMPLING DEVICE - Google Patents

Abstract

A device for sampling a well product, including a manifold line assembly with a bypass line, designed for the manifold line, and a sampling valve, characterized in that it has quick-detachable connections, the manifold line fragment has a check valve, and the manifold line has a three-way valve, This sampling valve is installed on a fragment of the manifold line.

Description

The utility model relates to the oil and gas industry and can be used in sampling well production.

A device for sampling from a pipeline is known, comprising a sampling element, a bypass pipe for diverting a stream, and a mixer mounted on a horizontal section of the pipeline between the entrance to the bypass pipe and its outlet, and in front of the sampling element, a pipe section is made to mix the pipeline flow before sampling (Patent No. 2249194, G01N 1/10, publ. 03/10/2004). The disadvantages of this device:

- the complete passage of liquid through the bypass pipeline is not ensured;

- there are no shut-off valves on the bypass line, as a result of which, due to the technological narrowing of the bypass line, it is possible that it is clogged at the narrowing point;

- low reliability of the samples due to the above disadvantages.

The closest in technical essence and the achieved result is a device for sampling well production, including a manifold line, a sampling valve, while it contains a fragment of the manifold line assembled with a bypass line mounted in a horizontal plane, with a three-way valve placed on it, a sampling valve and non-return valve (Patent PM No. 2249194, E21 B49 / 08, G01N 1/10, F17D 3/10, published on November 20, 2011).

The main disadvantage of this device is the decrease in the reliability of samples taken by the device due to a sharp change in the direction of fluid flow directed to the selection of products, the disadvantage is the difficulty of mounting in the field the need to install a bypass line strictly in the horizontal plane.

The technical task of the proposed utility model is to obtain the most reliable samples and simplify the use of the device.

The technical problem is solved by a device for sampling well production, including a fragment of the manifold line assembly with a bypass line, designed for the manifold line, and a sampling valve.

What is new is that the device has quick-detachable connections, the manifold line fragment has a non-return valve, and the manifold line has a three-way valve, while the sampling valve is mounted on the fragment of the manifold line.

Figure 1 shows the device on the side, figure 2 is on top.

A device for sampling a well product comprises a manifold line 1 (FIG. 1), a fragment 2 (FIG. 2) of the manifold line 1 assembled with a bypass line 3, equipped with a three-way valve 4 connecting a fragment 2 of the manifold line 1 with a bypass line 3, a sampling the crane 5 and the check valve 6, which are installed on the fragment 2 (figure 2) of the manifold line 1. In this case, the manifold line 1 and the fragment 2 of the manifold line 1 are equipped with the corresponding first quick connection 8, and the three-way valve 4 through the lateral branch 7 - the second quick disconnect th compound 9 for connection to the bypass line 3.

The device operates as follows.

Previously, the manifold line 1, located at the wellhead (not shown), is equipped with a three-way valve 4 with a flow diameter in the forward direction equal to or greater than the inner diameter of the manifold line 1. The lateral outlet 7 of the valve 4 is plugged. Before installing the device, valves 4 are moved to the closed position to close the manifold line 1 and outlet 7. A fragment (not shown) of the manifold line 1 is removed from the valve 4 to the first quick-detachable (for example, sleeve) connection 8, and instead a fragment 2 of the manifold line 1 is mounted with a sampling cock 5 (FIG. 1) and a check valve 6 assembled on it with a bypass line 3 (FIG. 2), which is connected by a quick-detachable connection 9 to a previously open outlet 7. Moreover, the check valve 6, missing flowing from the well, installed at a calculated distance from the three-way valve 4, providing the required sample volume. After installing the device, the valve 4 is switched to the "open" position for the product to move along fragment 2 for a certain period of time, for example 5-30 minutes (depending on the diameter and the estimated distance to valve 6 of fragment 2 of the manifold line 1, providing the required sample volume). Then the valve 4 is transferred to the “test” position, blocking the manifold line 1 and directing the flow along the bypass line 3, and as a result of the pressure drop created when switching the production flows of the well, the check valve 7 closes, cutting off the volume of the production of the well, which is intended to be merged through a sampling valve 5 (FIG. 1) into a sample container (not shown). After that, the valve 4 is moved to the closed position, the device is removed, and the manifold line 1 is brought back to its original state, after having drowned off tap 7. The valve 4 is switched to the open position. To monitor the operability of the device and the lack of tightness, the manifold line 1 and the bypass line 3 can be equipped with manometers 10 and 11, respectively.

Since during the passage through the device before taking the sample, the borehole fluid flows under absolutely the same conditions as when pumping it along the manifold line 1 without the device, the results of the analysis of the samples are most objective (the difference from the closest analogue is up to 3-5% ) There is no need for horizontal placement of bypass line 3, since sampling takes place from fragment 2 of manifold line 1, and bypass line 3 serves only to bypass fragment 2, as well as installing and removing three-way valve 4 with outlet 7 each time, which greatly simplifies installation of the device and reduces its cost. Moreover, the valve 4 allows you to disable the fragment 2 of the manifold line 1 for installation and removal of the device without the action of wellhead valves (not shown).

In the closest analogue, the flow of the borehole fluid (production of the well) ms occurs before the sample is taken along the bypass line, where the liquid changes direction at least 2 times (to the valve), it is in these areas that solid fractions stick to the walls of the device and due to differential pressure arising on them, there is a slight evolution of gas, which reduces the accuracy of the analysis of samples.

The proposed device for sampling well products is easy to use due to the lack of installation and removal of a three-way valve and the need to install a bypass line in a horizontal plane with a manifold line, and also allows you to obtain the most reliable samples by sampling from a fragment of the manifold line.

Claims (1)

A device for sampling a well product, including a manifold line assembly with a bypass line, designed for the manifold line, and a sampling valve, characterized in that it has quick-detachable connections, the manifold line fragment has a check valve, and the manifold line has a three-way valve, This sampling valve is installed on a fragment of the manifold line.

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