Shale formation drilling coring oil gas trapping device

Abstract

The utility model relates to the technical field of coring oil gas, in particular to a shale formation well drilling coring oil gas gathering device which comprises an outer pipe, threads are arranged at the lower end of the outer pipe, a storage pipe used for storing oil gas is arranged in the outer pipe, a partition plate and a filter plate are sequentially connected to the lower end in the storage pipe from top to bottom at intervals, and a guide rod is connected to the interior of the storage pipe. A piston is slidably connected to the guide rod and makes sealing contact with the inner wall of the storage pipe, and a storage cavity is formed among the piston, the partition plate and the storage pipe. Oil gas in rock stratums enters the storage cavity through the oil gas inlet pipe, the filter plate filters the oil gas, the piston moves upwards, after the storage cavity is filled with the oil gas, the electric valve is controlled to enable the oil gas inlet pipe not to be conducted, the oil gas in the rock stratums of different depths does not enter the storage cavity any more, and follow-up analysis on the oil gas is facilitated; and the oil gas in the storage cavity is discharged through the inflating valve, the oil gas trapping device does not need to be detached from the drill rod, and oil gas extraction is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of coring oil and gas, in particular to a shale formation drilling coring oil and gas capture device. Background Art

[0002] During the drilling process of shale formations, in order to understand the oil and gas content and reservoir characteristics, and to determine basic data such as oil and gas physical properties, thickness and area, it is necessary to capture the oil and gas in the rock formation, so as to provide oil and gas samples for oil and gas analysis.

[0003] The current oil and gas capture device enters the rock formation together with the drill bit. The oil and gas in the rock formation are filtered by the filter and enter the storage chamber through the oil and gas inlet. The piston moves upward, but the oil and gas outlet is located at the end. When the oil and gas need to be discharged, in order to connect the extraction pipeline with the oil and gas outlet, the oil and gas capture device and the drill pipe must be manually separated. The extraction of the captured oil and gas is not convenient enough, and in rock formations at different depths, the oil and gas inlets are always connected, resulting in oil and gas at different depths entering together, affecting the subsequent accurate analysis of the oil and gas. Utility Model Content

[0004] In order to solve the problem that the oil and gas capture device and the drill pipe must be separated when extracting the captured oil and gas, and oil and gas at different depths will enter together, the purpose of the utility model is to provide a shale formation drilling and coring oil and gas capture device.

[0005] The technical solution is as follows: A shale formation drilling and coring oil and gas capture device includes an outer tube with a thread at the lower end, a storage tube for storing oil and gas is provided inside the outer tube, a partition and a filter plate are connected to the lower end of the storage tube in sequence from top to bottom, a guide rod is connected inside the storage tube, a piston is slidably connected to the guide rod, the piston is in sealing contact with the inner wall of the storage tube, a storage chamber is formed between the piston, the partition and the storage tube, an oil and gas outlet is opened at the lower end of the storage tube and is located above the partition, and an oil and gas inlet pipe is installed on the partition.

[0006] Preferably, an air valve is installed inside the outer tube, and the air valve is located at the oil and gas outlet.

[0007] Preferably, an electric valve is installed on the partition, and the electric valve is used to control whether the oil and gas inlet pipe is conductive.

[0008] Preferably, the inner wall of the upper end of the outer tube is circumferentially connected to a fixed shaft, and an external threaded sleeve is slidably connected to the fixed shaft.

[0009] Preferably, a baffle is provided on the outer wall of the lower end of the outer tube, and the baffle blocks the valve mouth.

[0010] Preferably, the external threaded sleeve is connected to a plug rod, which is located between the inside of the outer tube and the outside of the storage tube. The baffle is connected to a plug block, which has a socket formed on it, and the plug rod is inserted into the socket.

[0011] The beneficial effects of the present invention are as follows: 1. The oil and gas in the rock formation enter the storage chamber through the oil and gas inlet pipe, the filter plate filters the oil and gas, and the piston moves upward. When the storage chamber is full of oil and gas, the electric valve is controlled to block the oil and gas inlet pipe, and the oil and gas in the rock formations at different depths will no longer enter the storage chamber, which is beneficial to the subsequent analysis of the oil and gas. The oil and gas in the storage chamber are then discharged through the valve mouth. There is no need to separate the oil and gas capture device from the drill pipe, and the extraction of oil and gas is more convenient.

[0012] 2. When the oil and gas capture device enters the rock formation, the rod is inserted into the socket and the baffle is closed to prevent the valve from being blocked. After the oil and gas capture device leaves the rock formation, the outer tube has a certain gravity, the rod leaves the socket, and the baffle can be opened to extract the captured oil and gas through the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0014] Figure 2 This is a schematic structural diagram of the outer tube and storage tube of the utility model after being cut open.

[0015] Figure 3 For this utility model Figure 2 Schematic diagram of the local structure in.

[0016] Figure 4 This is a structural diagram of the valve, external thread sleeve, baffle and insert rod of the utility model.

[0017] Figure 5 This is a schematic diagram of the connection relationship between the baffle, the plug rod and the plug block of the utility model.

[0018] Figure 6 It is a structural diagram of the valve mouth of the utility model.

[0019] Explanation of the reference numerals: 1-outer tube, 2-storage tube, 20-partition, 3-filter plate, 4-guide rod, 5-piston, 6-valve, 60-oil and gas outlet, 7-fixed shaft, 8-external threaded sleeve, 9-baffle, 10-insertion rod, 11-oil and gas inlet pipe, 12-electric valve, 13-plug-in block. DETAILED DESCRIPTION

[0020] To make the objectives, technical solutions, and advantages of the present invention more clearly apparent, the present invention will be further described in detail below with reference to the accompanying drawings. It is hereby stated that any directional terms such as "up," "down," "left," "right," "front," "back," "inside," and "outside" that appear or will appear in this document are based solely on the accompanying drawings and are not intended to limit the present invention.

[0021] Implementation 1: A shale formation drilling coring oil and gas capture device, please refer to Figures 1-6 , including an outer tube 1, a storage tube 2, a partition 20, a filter plate 3, a guide rod 4, a piston 5 and an oil and gas inlet pipe 11. The lower end of the outer tube 1 has a thread. The outer tube 1 is provided with a storage tube 2 for storing oil and gas. The lower end of the storage tube 2 is fixedly connected with the partition 20 and the filter plate 3 in sequence from top to bottom. The guide rod 4 is fixedly connected to the storage tube 2. The piston 5 is slidably connected to the guide rod 4. The piston 5 is in sealing contact with the inner wall of the storage tube 2. A storage chamber is formed between the piston 5, the partition 20 and the storage tube 2. The lower end of the storage tube 2 is opened at the partition 20 The oil and gas outlet 60 above, the outer tube 1 is equipped with a valve 6, and the valve 6 is located at the oil and gas outlet 60; the partition 20 is equipped with an oil and gas inlet pipe 11; the lower side of the partition 20 is equipped with an electric valve 12, and the electric valve 12 is used to control whether the oil and gas inlet pipe 11 is conductive. The valve 6 and the electric valve 12 are specifically existing technologies, and the power line and signal line of the electric valve 12 are specifically laid in the hole on the side wall of the storage tube 2; four fixed shafts 7 are circumferentially fixedly connected to the inner wall of the upper end of the outer tube 1, and the four fixed shafts 7 are slidably connected to an external threaded sleeve 8.

[0022] First, the device is installed on the drilling rod through the thread at the lower end of the outer tube 1 and the external threaded sleeve 8. When the oil and gas capture device enters the rock formation together with the drill bit, the oil and gas in the rock formation enters the storage chamber through the oil and gas inlet pipe 11. The filter plate 3 plays the role of filtering the oil and gas. As the oil and gas continue to enter the storage chamber, the piston 5 moves upward along the guide rod 4. When the storage chamber is full of oil and gas, the electric valve 12 is controlled to make the oil and gas inlet pipe 11 become non-conductive; at this time, the oil and gas capture device leaves the rock formation together with the drill bit. Since the oil and gas inlet pipe 11 is non-conductive, the oil and gas in the rock formations at different depths will no longer enter the storage chamber, which can prevent the oil and gas at different depths from entering together, thereby facilitating the subsequent analysis of the oil and gas.

[0023] After the oil and gas capture device and the drill bit leave the rock formation, the oil and gas captured in the storage chamber can be discharged by connecting the valve mouth 6 to the external extraction pipeline, thereby eliminating the need to separate the oil and gas capture device from the drill pipe, making the operation of extracting oil and gas more convenient, and the oil and gas of the next rock formation can be captured again.

[0024] Implementation 2: Based on Implementation 1, please refer to Figure 1-Figure 5The outer wall of the lower end of the outer tube 1 is rotatably connected to a baffle 9, which blocks the valve mouth 6; the lower part of the external threaded sleeve 8 is fixedly connected to a plug rod 10, which is located between the inside of the outer tube 1 and the outside of the storage tube 2. A plug block 13 is fixedly connected to the baffle 9, and a socket is opened on the plug block 13, and the plug rod 10 is inserted into the socket.

[0025] When the oil and gas capture device enters the rock formation together with the drill bit, the drill bit will be subject to resistance, so that the external threaded sleeve 8 maintains its initial position relative to the outer tube 1, the plug rod 10 is inserted into the socket of the plug block 13, and the baffle 9 is in a closed state. In the process of capturing oil and gas, the baffle 9 can prevent the valve mouth 6 from being blocked. In the process of the oil and gas capture device leaving the rock formation with the drill bit, the baffle 9 is blocked by the rock formation and the baffle 9 will also be in a closed state; after the oil and gas capture device leaves the rock formation, the outer tube 1 has a certain gravity, so that the external threaded sleeve 8 will move upward relative to the outer tube 1, and the external threaded sleeve 8 drives the plug rod 10 to move together, and the plug rod 10 leaves the socket. At this time, the baffle 9 can be manually opened to extract the captured oil and gas through the valve mouth 6; the fixed shaft 7 can prevent the external threaded sleeve 8 from rotating, keep the plug rod 10 aligned with the socket in the vertical direction, and facilitate the plug rod 10 to be inserted into the socket again.

[0026] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A shale formation drilling coring oil and gas capture device, comprising an outer tube (1), characterized in that: The lower end of the outer tube (1) has a thread, and a storage tube (2) for storing oil and gas is provided inside the outer tube (1). The lower end of the storage tube (2) is sequentially connected with a partition (20) and a filter plate (3) at intervals from top to bottom. The storage tube (2) is connected with a guide rod (4) inside, and a piston (5) is slidably connected to the guide rod (4). The piston (5) is in sealing contact with the inner wall of the storage tube (2). A storage chamber is formed between the piston (5), the partition (20) and the storage tube (2). The lower end of the storage tube (2) is provided with an oil and gas outlet (60) located above the partition (20), and an oil and gas inlet pipe (11) is installed on the partition (20).

2. The shale formation drilling coring oil and gas capture device according to claim 1, characterized in that: An air valve (6) is installed inside the outer tube (1), and the air valve (6) is located at the oil and gas outlet (60).

3. The shale formation drilling coring oil and gas capture device according to claim 2, characterized in that: An electric valve (12) is installed on the partition (20), and the electric valve (12) is used to control whether the oil and gas inlet pipe (11) is open.

4. The oil and gas capture device for coring shale formation drilling according to claim 3, characterized in that: A fixed shaft (7) is circumferentially connected to the inner wall of the upper end of the outer tube (1), and an external threaded sleeve (8) is slidably connected to the fixed shaft (7).

5. The oil and gas capture device for coring shale formation drilling according to claim 4, characterized in that: A baffle (9) is provided on the outer wall of the lower end of the outer tube (1), and the baffle (9) blocks the valve (6).

6. The oil and gas capture device for coring shale formation drilling according to claim 5, characterized in that: The external threaded sleeve (8) is connected to an insertion rod (10), the insertion rod (10) is located between the interior of the outer tube (1) and the exterior of the storage tube (2), the baffle (9) is connected to an insertion block (13), the insertion block (13) is provided with an insertion hole, and the insertion rod (10) is inserted into the insertion hole.

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