Multilayer sampling equipment for oil field exploration

Abstract

The utility model belongs to the technical field of oil field exploration, and particularly relates to multilayer sampling equipment for oil field exploration, which comprises a shell and a sampler, an inner cavity of the shell is divided into a gas cavity and a placement cavity by a partition plate, a vacuum pump is arranged in the gas cavity, the sampler is arranged in the placement cavity, a box body of the sampler is provided with a second feed port, and the second feed port is communicated with the vacuum pump. The second feeding ports correspond to the first feeding ports formed in the shell in a one-to-one mode, and plugging plates embedded in the second feeding ports are fixedly connected to the plugging air bags. According to the sampling equipment disclosed by the utility model, the plurality of samplers are arranged in the sampling equipment, when the sampling equipment is lowered to a specified sampling depth, the electromagnetic valves on the corresponding samplers are opened, gas in the samplers is exhausted, and the feeding holes are also opened, so that materials smoothly flow into the samplers to complete sampling; and the sampling operation of all sampling depths can be completed through one-time lowering, so that the sampling efficiency is high, and the sampling device is convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of oilfield exploration, in particular to a multi-layer sampling device for oilfield exploration. Background Technique

[0002] During the process of oilfield production and construction, in order to investigate the crude oil quality of oil layers at different depths, exploration equipment is needed to collect oil samples for subsequent component analysis. However, there are still some problems with the existing sampling equipment for oilfield exploration.

[0003] For example, a kind of oilfield production sampling equipment with the publication number of CN212483029U includes a sampling frame, support legs, support foot seats, a cabinet, a control switch, a storage battery, a photovoltaic charger, a sampling pump, a diversion pipe, a connecting oil pipe, a metal hose, an oil pumping nozzle, a detachable sampling and filtering oil tank structure, a sampling storage and disassembly bottle structure and an adjustable outdoor operation protection plate structure. It is difficult to sample oil layers at multiple depths simultaneously, and the internal samples are prone to mixing. The device can only sample oil layers at a single depth, and the sampling efficiency of the samples is low. Content of the Utility Model

[0004] (1) Technical Problems to be Solved

[0005] Aiming at the deficiencies of the prior art, the utility model provides a multi-layer sampling device for oilfield exploration, which solves the problems of only sampling oil layers at a single depth and low sampling efficiency of samples.

[0006] (2) Technical Solutions

[0007] The utility model specifically adopts the following technical solutions to achieve the above purposes:

[0008] A multi-layer sampling device for oilfield exploration includes a housing and a sampler. The internal cavity of the housing is divided into an air cavity and an installation cavity by a partition arranged therein. A vacuum pump is installed in the air cavity, and a sampler is installed in the installation cavity. A second feed port is opened on the box body of the sampler, and the second feed port is arranged in one-to-one correspondence with the first feed port opened on the housing. Moreover, a sealing plate embedded on the second feed port is fixedly connected to a sealing airbag. The sealing airbag is fixedly connected to an electromagnetic valve on a puncture needle tube through a connecting hose. The puncture needle tube passes through a rubber plug on the partition and extends into the air cavity.

[0009] Furthermore, a limit convex strip integrally arranged on the outer wall of the box body is inserted into a limit inner cylinder in the installation cavity inside the housing, and a limit groove for cooperating with the limit convex strip is opened on the limit inner cylinder;

[0010] A sealing cover is fixedly embedded in the open port at one end of the box body. A sealing gasket is arranged at the connection part between the sealing cover and the box body port. Moreover, the internal cavity of the box body is divided into a feed cavity and a storage cavity by a filter plate;

[0011] The second feed port opened on the side wall of the box body is cooperatively arranged with the plugging plate on the plugging airbag, and the edge part of the plugging airbag abuts against the inner wall of the box body.

[0012] Furthermore, a connecting seat is fixedly connected to the shell, a flange plate is integrally arranged on the connecting seat, and a feed filter screen is arranged in the first feed port opened on the side wall of the shell;

[0013] An end cover is arranged at the lower port part of the shell, and a threaded seat integrally arranged at the middle part of the end cover is threadedly connected to the port part of the limiting inner cylinder.

[0014] (III) Beneficial effects

[0015] Compared with the prior art, the utility model provides a multi-layer sampling device for oilfield exploration, which has the following beneficial effects:

[0016] In the utility model, a plurality of samplers are arranged in the sampling device. When the device is lowered to the specified sampling depth, the solenoid valve on the corresponding sampler is opened. While discharging the gas in the sampler, the feed port is also opened, so that the material can smoothly flow into the sampler to complete the sampling. It only needs to lower the device to the specified sampling depth one by one for sampling. The sampling operation of all sampling depths can be completed by one lowering, with high sampling efficiency and convenient use. Description of the drawings

[0017] Figure 1 is a schematic structural diagram of the utility model;

[0018] Figure 2 is a cross-sectional view of the shell in the utility model;

[0019] Figure 3 is a cross-sectional view of the sampler in the utility model.

[0020] In the figure: 1. Shell; 101. Partition board; 102. Rubber plug; 103. Air chamber; 104. Limiting inner cylinder; 105. End cover; 106. First feed port; 107. Connecting seat; 2. Sampler; 201. Box body; 202. Filter plate; 203. Plugging cover; 204. Limiting rib; 205. Second feed port; 206. Plugging airbag; 207. Connecting hose; 208. Solenoid valve; 209. Puncture needle tube. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] Embodiment

[0023] As Figure 1 、 Figure 2 and Figure 3 shown, a multi-layer sampling device for oilfield exploration proposed in an embodiment of the present utility model includes a housing 1 and a sampler 2. The inner cavity of the housing 1 is divided into a gas chamber 103 and an installation chamber by a partition 101 arranged therein. A vacuum pump is installed in the gas chamber 103. The exhaust pipe installed on the vacuum pump extends to the outside through a perforation opened on the housing 1, facilitating the smooth discharge of the gas in the gas chamber 103 to the outside of the housing 1, thereby ensuring that the corresponding sampler 2 is evacuated, and due to the effect of its air pressure, the materials outside the housing 1 smoothly flow into the sampler 2 from the first feed port 106 and the second feed port 205, ensuring the smooth completion of the sampling operation. And a sampler 2 is installed in the installation chamber. A second feed port 205 is opened on the box body 201 of the sampler 2, and the second feed port 205 is arranged in one-to-one correspondence with the first feed port 106 opened on the housing 1, facilitating the smooth entry of materials into the sampler 2 during the sampling process and completing the sampling at the corresponding position. Moreover, the sealing plate embedded in the second feed port 205 is fixedly connected to a sealing airbag 206. The sealing airbag 206 is fixedly connected to a solenoid valve 208 on a puncture needle tube 209 through a connecting hose 207. The air inlets provided on the solenoid valve 208 are respectively communicated with the inner cavity of the box body 201 and the connecting hose 207. The puncture needle tube 209 passes through a rubber plug 102 on the partition 101 and extends into the gas chamber 103, facilitating that after the sampler 2 reaches the designated sampling position, the solenoid valve 208 is opened. Under the condition that the vacuum pump in the gas chamber 103 evacuates, the gas inside the sealing airbag 206 and the gas in the inner cavity of the box body 201 smoothly enter the gas chamber 103 and are then discharged under the action of the vacuum pump. At this time, the sealing airbag 206 contracts and pulls the sealing plate to separate from the second feed port 205, opening the second feed port 205. Subsequently, under the negative pressure formed by the outward discharge of the gas inside the box body 201, the external materials smoothly flow into the box body 201 from the first feed port 106 and the second feed port 205, completing the sampling operation.

[0024] As Figure 1 and Figure 3As shown, in some embodiments, the limiting rib 204 integrally provided on the outer wall of the box body 201 is inserted into the limiting inner cylinder 104 in the placement cavity inside the housing 1. A limiting groove for cooperating with the limiting rib 204 is provided on the limiting inner cylinder 104. By means of the cooperation between the two, it is ensured that the sampler 2 is stably installed in the housing 1, so that the two are stably fitted together to perform sampling stably;

[0025] A sealing cover 203 is fixedly embedded in the open port at one end of the box body 201. A sealing gasket is arranged at the connection part between the sealing cover 203 and the port of the box body 201, so that the two are stably connected together, ensuring that the sampler 2 can stably store the sampled material, ensuring stable use. Moreover, the cavity inside the box body 201 is divided into a feed cavity and a storage cavity by a filter plate 202. Among them, the feed cavity preliminarily stores the sampled material, and the discharge cavity finally stores the sampled material. The filter plate 202 is used to filter the incoming material again to improve the quality of sampling;

[0026] The second feed port 205 provided on the side wall of the box body 201 is arranged in cooperation with the blocking plate on the blocking airbag 206. The edge part of the blocking airbag 206 abuts against the inner wall of the box body 201, facilitating the stable installation of the blocking plate at the second feed port 205 by using the blocking airbag 206, so that the blocking plate stably blocks the second feed port 205. At the same time, it is also ensured that when sampling is required, the internal gas of the blocking airbag 206 can be extracted, causing the blocking airbag 206 to contract, and during the contraction process, the blocking plate is pulled down from the second feed port 205 to open the second feed port 205, enabling the material to be sampled to smoothly enter the sampler 2, and then completing the sampling.

[0027] As Figure 1 and Figure 2 As shown, in some embodiments, a connection seat 107 is fixedly connected to the housing 1. A flange plate is integrally provided on the connection seat 107, facilitating the stable connection of the entire sampling device to the downhole device, so that the device can be smoothly lowered into the exploration wellhead and lowered to a specified depth for sampling. Moreover, a feed filter is arranged in the first feed port 106 provided on the side wall of the housing 1, facilitating the filtration of the material entering the sampler 2 during the sampling process, preventing impurities such as sand and gravel from entering the sampler 2, and improving the quality of sampling;

[0028] An end cover 105 is arranged at the lower port part of the housing 1. The threaded seat integrally provided at the middle part of the end cover 105 is threadedly connected to the port part of the limiting inner cylinder 104, facilitating the stable installation of the end cover 105 at the port part of the housing 1, ensuring the stable installation of the sampler 2 inside the housing 1, and ensuring stable use.

[0029] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A multi-layer sampling device for oilfield exploration, comprising a housing (1) and a sampler (2), characterized in that: The inner cavity of the housing (1) is divided into an air chamber (103) and a placement chamber by the arranged partition plate (101). A vacuum pump is arranged in the air chamber (103), and a sampler (2) is arranged in the placement chamber. A second feed port (205) is formed on the box body (201) of the sampler (2). The second feed port (205) is arranged in one-to-one correspondence with the first feed port (106) formed on the housing (1). Moreover, the plugging plate embedded on the second feed port (205) is fixedly connected to a plugging airbag (206). The plugging airbag (206) is fixedly connected to an electromagnetic valve (208) on a puncture needle tube (209) through a connecting hose (207). The puncture needle tube (209) passes through a rubber plug (102) on the partition plate (101) and extends into the air chamber (103).

2. The multi-layer sampling device for oilfield exploration according to claim 1, characterized in that: The limiting rib (204) integrally arranged on the outer wall of the box body (201) is inserted on a limiting inner cylinder (104) in the placement chamber inside the housing (1). A limiting groove for cooperating with the limiting rib (204) is formed on the limiting inner cylinder (104).

3. The multi-layer sampling device for oilfield exploration according to claim 2, wherein: A plugging cover (203) is fixedly embedded in the open port at one end of the box body (201). A sealing gasket is arranged at the connection part between the plugging cover (203) and the port of the box body (201). Moreover, the inner cavity of the box body (201) is divided into a feed chamber and a storage chamber by a filter plate (202).

4. The multi-layer sampling device for oilfield exploration according to claim 2, characterized in that: The second feed port (205) formed on the side wall of the box body (201) is arranged in cooperation with the plugging plate on the plugging airbag (206). The edge part of the plugging airbag (206) abuts against the inner wall of the box body (201).

5. A multi-layer sampling device for oilfield exploration according to claim 1, characterized in that: A connection seat (107) is fixedly connected to the housing (1). A flange plate is integrally arranged on the connection seat (107). Moreover, a feed filter screen is arranged in the first feed port (106) formed on the side wall of the housing (1).

6. The multi-layer sampling device for oilfield exploration according to claim 5, wherein: An end cover (105) is arranged at the lower port part of the housing (1). A threaded seat integrally arranged at the middle part of the end cover (105) is threadedly connected to the port part of the limiting inner cylinder (104).

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