Tight oil rock core sample collection equipment

Abstract

The utility model discloses tight oil rock core sample collecting equipment which comprises a contact pipe and a splicing pipe, the splicing pipe is detachably installed on the upper portion of the contact pipe, the splicing pipe comprises a plurality of first arc-shaped plates, and the first arc-shaped plates are detachably installed on the contact pipe. The multiple first arc-shaped plates are circumferentially distributed on one side of the contact pipe with the circle center of the contact pipe as the axis to form the splicing pipe, fixing assemblies are arranged between the first arc-shaped plates and the contact pipe, and the first arc-shaped plates are connected with the contact pipe in an inserted mode and are installed in a limited mode through the fixing assemblies. In order to ensure the integrity of the tight oil core sample, the splicing pipe is detached from the upper part of the contact pipe, so that the main body of the tight oil core sample is exposed in the air, and then the tight oil core sample is pushed from the lower part of the contact pipe, so that the tight oil core sample can be collected completely; and storage and segmentation in subsequent work are facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of core collection, and in particular relates to a dense oil core sample collection device. Background Art

[0002] Tight oil cores are rock samples obtained during the development of tight oil, and they play an important role in deepening the understanding of reservoir fracture extension mechanisms and fracture network characteristics.

[0003] The collection of tight oil core samples needs to follow certain procedures and steps to determine the sampling location: determine the strata and horizons to be sampled based on geological maps and geophysical data. Prepare sampling tools: including core drill bits, core barrels, samplers, etc. Drilling sampling: Use a drilling rig to drill at a predetermined location. After drilling to the stratum where samples need to be collected, place the core barrel into the well and use a sampler to take the core sample out of the core barrel. Sample processing: Clean, dry, and sort the obtained core samples for subsequent analysis and research.

[0004] When collecting tight oil core samples, a sampling tube is often used for core sampling. At this time, the core is located at the bottom of the sampling tube. When taking out the core, the sampling tube is often vibrated to take out the core, but it is easy to cause the core to break. Therefore, we propose a tight oil core sample collection device.

[0005] The patent with publication number CN213711003U in the prior art discloses an engineering drilling core tube, which belongs to the technical field of geological exploration equipment. It solves the problems that the taken core is easy to fall from the core tube during the upward extraction process with the core tube, and the integrity of the rock sample will be destroyed by workers manually knocking on the core tube to take samples. The above-mentioned includes an upper end cover, a tube body and a lower end cover. The tube body includes a left tube body and a right tube body. The left tube body and the right tube body are connected by relative sliding along the axial direction, and the left tube body and the right tube body are relatively fixed along the radial direction. A material blocking device is provided in the lower end cover. When the core tube rotates in the opposite direction to the drilling direction, the material blocking device can exceed the inner wall of the lower end cover to form a material blocking ring, thereby preventing the rock sample in the tube body from falling. The advantage of the utility model is that when the core tube is reversed, the block will slide to the lowest point under the action of centrifugal force. At this time, the outer end face of the block exceeds the inner wall of the lower end cover, which can effectively prevent the rock sample in the tube body from falling, thereby ensuring the integrity of the rock sample;

[0006] The means for the above-mentioned device to remove the core is to wait for the core to fall into the left and right tube bodies and then open the left and right tube bodies, which does not conform to the actual situation. In the process of core drilling and sampling, the inner wall of the core sampling tube is close to the core, and it is difficult to slide between the left and right tube bodies. Therefore, there is a background technology of removing the core with the help of oscillation force, and the pipeline formed by the left and right tube bodies is an independent pipeline, which will cause the left and right tube bodies to rotate, while the contact position between the relative tube body and the core will not rotate, thereby unable to realize drilling and cutting work, so that the auxiliary work on the tube body contact position and the pipeline formed by the left and right tube bodies and Xining can be driven separately. Although sampling work can be carried out, it is necessary to customize the corresponding auxiliary drilling equipment, which is costly. Utility Model Content

[0007] In view of the problems existing in the prior art, the utility model provides a tight oil core sample collection device, which solves the problem that when collecting tight oil core samples, a sampling tube is often used for core sampling. At this time, the core is located at the lower part of the sampling tube. When taking out the core, the sampling tube is often vibrated to take out the core, but this can easily cause the core to break.

[0008] The utility model is achieved in this way:

[0009] A tight oil core sample collection device comprises a contact tube and a spliced ​​tube, wherein the spliced ​​tube is detachably mounted on the upper portion of the contact tube, the spliced ​​tube comprises a first arc-shaped plate, a plurality of the first arc-shaped plates are provided, and the plurality of the first arc-shaped plates are circumferentially distributed on one side of the contact tube with the center of the contact tube as the axis to form the spliced ​​tube, a fixing assembly is provided between the first arc-shaped plate and the contact tube, the first arc-shaped plate is plugged into the contact tube and is limitedly mounted by the fixing assembly.

[0010] As a preferred embodiment of the utility model, three first arc-shaped plates are provided, and the three first arc-shaped plates are circumferentially distributed on one side of the contact tube. A connecting tube is also provided on the side of the splicing tube away from the contact tube. The connecting tube has the same structure as the contact tube, and one side of the splicing tube is fixedly installed at the lower part of the connecting tube.

[0011] As a preferred embodiment of the utility model, the contact tube comprises a sampling tube body used for contact cutting of tight oil cores, and a mounting tube body is fixedly connected to the upper portion of the sampling tube body.

[0012] As a preferred embodiment of the present invention, a slot corresponding to the number of the first arc-shaped plates is opened inside the side of the installation tube body away from the sampling tube body.

[0013] As a preferred embodiment of the present invention, a first plug plate is fixedly connected to the upper portion of the first arc plate, a second plug plate is fixedly connected to the lower portion of the first arc plate, the first plug plate and the second plug plate have the same structure, and the outer portion of the first plug plate matches the slot.

[0014] As a preferred embodiment of the utility model, the fixing assembly includes a screw and a second arc plate, a limiting hole is provided inside the plug plate, the screw passes through the limiting hole and is screwed to the mounting tube body, a second arc plate is also slidably installed inside the mounting tube body, the second arc plate has the same curvature as the first plug plate, one side of the second arc plate is fitted with the first plug plate, and the outside of the screw is screwed to the second arc plate.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0016] The utility model is installed at the output end of the auxiliary machinery when collecting the tight oil core sample. The auxiliary machinery includes drilling equipment. The drilling equipment drives the contact tube to descend and rotate to cut the tight oil core. At this time, the main body of the tight oil core sample is transmitted to the splicing tube through the contact tube to complete the collection work. At this time, the drilling equipment controls the splicing tube to rise to complete the sampling work. In order to ensure the integrity of the tight oil core sample, the splicing tube is first detached from the upper part of the contact tube so that the main body of the tight oil core sample is exposed to the air, and then the tight oil core sample is pushed from the lower part of the contact tube, thereby ensuring that the tight oil core sample can be collected and convenient for subsequent storage and segmentation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure provided by an embodiment of the utility model.

[0018] Figure 2 It is a schematic diagram of a splicing tube provided by an embodiment of the utility model.

[0019] Figure 3 It is a schematic diagram of a contact tube provided in an embodiment of the utility model.

[0020] Figure 4 It is a schematic diagram of a fixing assembly provided in an embodiment of the utility model.

[0021] In the figure: 1. Splicing tube; 2. Contact tube; 3. Connecting tube; 4. Fixing assembly;

[0022] 101, first arc-shaped plate; 102, first plug plate; 103, second plug plate; 104, limiting hole;

[0023] 201, sampling tube body; 202, installation tube body; 203, slot;

[0024] 401, screw; 402, second arc-shaped plate. DETAILED DESCRIPTION

[0025] In order to further understand the content, features and effects of the utility model, the following embodiments are given as examples and described in detail with reference to the accompanying drawings.

[0026] The structure of the utility model is described in detail below in conjunction with the accompanying drawings.

[0027] like Figures 1 to 4 As shown, a tight oil core sample collection device provided by an embodiment of the utility model includes a contact tube 2 and a spliced ​​tube 1, wherein the spliced ​​tube 1 is detachably installed on the upper part of the contact tube 2, and the spliced ​​tube 1 includes a first arc plate 101, and the first arc plate 101 is provided with a plurality of them, and the plurality of first arc plates 101 are circumferentially distributed on one side of the contact tube 2 with the center of the contact tube 2 as the axis to form the spliced ​​tube 1, and a fixing component 4 is provided between the first arc plate 101 and the contact tube 2, and the first arc plate 101 is plugged into the contact tube 2 and is limitedly installed by the fixing component 4.

[0028] The above-mentioned tight oil core sample collection device is installed at the output end of the auxiliary machinery when collecting tight oil core samples. The auxiliary machinery includes drilling equipment. The drilling equipment drives the contact tube 2 to descend and rotate to cut the tight oil core. At this time, the main body of the tight oil core sample is transmitted to the splicing tube 1 through the contact tube 2 to complete the collection work. At this time, the drilling equipment controls the splicing tube 1 to rise to complete the sampling work.

[0029] In order to ensure the integrity of the tight oil core sample, the splicing tube 1 is first detached from the upper part of the contact tube 2, so that the main body of the tight oil core sample is exposed to the air, and then the tight oil core sample is pushed from the lower part of the contact tube 2, thereby ensuring that the tight oil core sample can be collected and facilitating subsequent storage and segmentation.

[0030] In this embodiment, three first arc plates 101 are provided, and the three first arc plates 101 are circumferentially distributed on one side of the contact tube 2. A connecting tube 3 is also provided on the side of the splicing tube 1 away from the contact tube 2. The connecting tube 3 has the same structure as the contact tube 2, and one side of the splicing tube 1 is fixedly installed at the lower part of the connecting tube 3.

[0031] In the assembly of the spliced ​​tube 1, three first arc plates 101 are used for splicing, and a connecting tube 3 is set on the upper part of the spliced ​​tube 1 to limit the other end of the spliced ​​tube 1 and connect and fix it with the output end of the drilling equipment, so that the drilling equipment can drive the contact tube 2 to rotate.

[0032] In this embodiment, the contact tube 2 includes a sampling tube body 201 for contact cutting of tight oil cores, and a mounting tube body 202 is fixedly connected to the upper part of the sampling tube body 201. The mounting tube body 202 is provided with slots 203 corresponding to the number of the first arc-shaped plates 101 on the inner side away from the sampling tube body 201. A first plug plate 102 is fixedly connected to the upper part of the first arc-shaped plate 101, and a second plug plate 103 is fixedly connected to the lower part of the first arc-shaped plate 101. The first plug plate 102 and the second plug plate 103 have the same structure, and the outer part of the first plug plate 102 matches the slots 203.

[0033] In order to facilitate the rapid installation and removal of the spliced ​​tube 1 while ensuring the stability of the transmission between the spliced ​​tube 1 and the contact tube 2, the contact tube 2 is divided into a sampling tube body 201 and an installation tube body 202. The sampling tube body 201 is used for contact and cutting operations with the tight oil core. The upper part of the slot 203 of the installation tube body 202 is used to plug in the first plug-in plate 102 of the first arc plate 101, and then fixed or removed by the fixing component 4.

[0034] In this embodiment, the fixing assembly 4 includes a screw 401 and a second curved plate 402. A limiting hole 104 is provided inside the plug plate. The screw 401 passes through the limiting hole 104 and is screwed to the mounting tube body 202. A second curved plate 402 is also slidably installed inside the mounting tube body 202. The second curved plate 402 has the same curvature as the first plug plate 102. One side of the second curved plate 402 is in contact with the first plug plate 102. The screw 401 is screwed to the second curved plate 402 on the outside.

[0035] In fixing the first curved plate 101, the plug plate of the first curved plate 101 is first fixed in the mounting tube 202 by means of the screw 401, and in order to ensure the stability of the plug plate, the second curved plate 402 is also slidably installed in the mounting tube 202, so that when the first screw 401 rotates, the second curved plate 402 can be controlled to move toward the first plug plate 102 for fitting and secondary fixation.

[0036] The working principle of this utility model:

[0037] When collecting tight oil core samples, it is installed at the output end of the auxiliary machinery, which includes drilling equipment. The drilling equipment drives the contact tube 2 to descend and rotate to cut the tight oil core. At this time, the main body of the tight oil core sample is transmitted to the splicing tube 1 through the contact tube 2 to complete the collection work. At this time, the drilling equipment controls the splicing tube 1 to rise to complete the sampling work. In order to ensure the integrity of the tight oil core sample, the splicing tube 1 is first detached from the upper part of the contact tube 2, so that the main body of the tight oil core sample is exposed to the air, and then the tight oil core sample is pushed from the lower part of the contact tube 2, thereby ensuring that the tight oil core sample can be collected and convenient for subsequent storage and segmentation.

[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tight oil core sample collection device, comprising a contact tube (2) and a spliced ​​tube (1), characterized in that: The splicing tube (1) is detachably mounted on the upper part of the contact tube (2), and the splicing tube (1) comprises a first arc-shaped plate (101). A plurality of the first arc-shaped plates (101) are provided. The plurality of the first arc-shaped plates (101) are circumferentially distributed on one side of the contact tube (2) with the center of the contact tube (2) as an axis to form the splicing tube (1). A fixing component (4) is provided between the first arc-shaped plate (101) and the contact tube (2), and the first arc-shaped plate (101) is plugged into the contact tube (2) and is limitedly mounted by the fixing component (4).

2. A tight oil core sample collection device according to claim 1, characterized in that: Three first arc-shaped plates (101) are provided, and the three first arc-shaped plates (101) are circumferentially distributed on one side of the contact tube (2). A connecting tube (3) is also provided on a side of the splicing tube (1) away from the contact tube (2). The connecting tube (3) has the same structure as the contact tube (2), and one side of the splicing tube (1) is fixedly mounted on the lower part of the connecting tube (3).

3. A tight oil core sample collection device according to claim 1, characterized in that: The contact tube (2) comprises a sampling tube body (201) used for contact cutting of tight oil cores, and a mounting tube body (202) is fixedly connected to the upper part of the sampling tube body (201).

4. A tight oil core sample collection device as claimed in claim 3, characterized in that: Slots (203) corresponding in number to the first arc-shaped plates (101) are provided inside a side of the installation tube body (202) away from the sampling tube body (201).

5. A tight oil core sample collection device as claimed in claim 4, characterized in that: The first arc-shaped plate (101) is fixedly connected to a first plugging plate (102) at the upper portion, and the second plugging plate (103) is fixedly connected to a second plugging plate (103) at the lower portion of the first arc-shaped plate (101). The first plugging plate (102) and the second plugging plate (103) have the same structure, and the exterior of the first plugging plate (102) matches the slot (203).

6. A tight oil core sample collection device as claimed in claim 5, characterized in that: The fixing assembly (4) comprises a screw rod (401) and a second arc-shaped plate (402); a limiting hole (104) is provided inside the plug plate; the screw rod (401) passes through the limiting hole (104) and is screwed to the mounting tube body (202); a second arc-shaped plate (402) is also slidably mounted inside the mounting tube body (202); the second arc-shaped plate (402) has the same curvature as the first plug plate (102); one side of the second arc-shaped plate (402) is in contact with the first plug plate (102); and the screw rod (401) is screwed to the second arc-shaped plate (402) on the outside.

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