Core pushing device for multi-tube coring

Abstract

The invention provides a core pushing device aiming at multi-tube coring, which can quickly and completely withdraw a core sample, and comprises a core pushing oil cylinder, a core pushing device, a core pulling device and a core pulling device, the core pushing outer tube is used for containing a core sample packaging unit of a multi-tube structure, and the core sample packaging unit comprises a transparent core tube containing a core sample and a packaging inner tube arranged outside the transparent core tube in a sleeving mode; the push core outer pipe joint is arranged and connected between the front part of the push core oil cylinder and the rear part of the push core outer pipe; the push core outer tube nut is connected with the front end of the push core outer tube, and a third positioning step is arranged on the inner wall of the front end of the push core outer tube nut and used for abutting against the front end of the packaging inner tube of the core sample packaging unit; wherein in the working process of the core pushing oil cylinder, the piston rod forwards pushes and presses the transparent core tube of the core sample packaging unit or the core sample contained in the transparent core tube, so that the transparent core tube containing the core sample moves forwards and is withdrawn from the packaging inner tube.

Description

Technical Field

[0001] The invention relates to the field of exploration technology, in particular to a core pushing device for multi-tube coring. Background Art

[0002] The large-scale construction of high-speed railways, the introduction of initial route design and surveys, and dynamic design and construction plans have led to an increase in the use of coring at construction sites. Existing coring techniques primarily include single-tube coring, percussion coring, and multiple-tube coring. However, single-tube coring is difficult to obtain in soft formations, has a low coring rate, and significantly disturbs the core sample due to the addition of water. Percussion coring is primarily targeted at soft formations, but has a relatively low coring rate in hard formations and significantly disturbs the core sample. Multiple-tube coring effectively avoids the effects of added water on the core sample and is practical for both soft and hard formations. However, removing the core sample from the core tube is cumbersome and can easily damage the core sample. Summary of the Invention

[0003] An embodiment of the present invention provides a core pushing device for multiple tube coring, which can quickly and completely eject core samples.

[0004] According to an embodiment of the present invention, there is provided a core pushing device for coring multiple tubes, which comprises: a core pushing cylinder, a core pushing outer tube joint, a core pushing outer tube and a core pushing outer tube nut;

[0005] The core-pushing oil cylinder has an outer cylinder sleeve and a piston rod extending forward at its front end; the rear end of the outer cylinder sleeve is provided with an external thread for connecting to the core-pushing outer pipe joint, and the front end of the outer cylinder sleeve is provided with a first positioning step for positioning the core-pushing outer pipe joint; the front end of the first positioning step is connected to the piston rod;

[0006] The core-pushing outer tube is used to accommodate a core sample packaging unit of a multi-tube structure, and the core sample packaging unit includes a transparent core tube containing a core sample and a packaging inner tube sleeved outside the transparent core tube; the inner wall of the rear end of the core-pushing outer tube is provided with an internal thread for connecting to a core-pushing outer tube joint, and the front end of the core-pushing outer tube is provided with an external thread for connecting to a core-pushing outer tube nut;

[0007] The core-pushing outer tube joint is provided and connected between the front part of the core-pushing oil cylinder and the rear part of the core-pushing outer tube; an internal thread is provided on the inner wall of the rear end of the core-pushing outer tube joint for connecting with the external thread of the outer cylinder sleeve of the core-pushing oil cylinder, and an external thread is provided on the front end of the core-pushing outer tube joint for connecting with the internal thread of the rear end of the core-pushing outer tube; a second positioning step is provided on the inner wall of the front end of the core-pushing outer tube joint for positioning and fixing the rear end of the encapsulated inner tube outside the transparent core tube;

[0008] The core push outer tube nut has an inner thread on its rear end inner wall for connecting with the outer thread at the front end of the core push outer tube; a third positioning step is provided on its front end inner wall for abutting against the front end of the packaging inner tube of the core sample packaging unit;

[0009] Wherein, during the operation of the core pushing cylinder, the piston rod pushes the transparent core tube of the core sample packaging unit or the core sample contained in the transparent core tube forward, so that the transparent core tube containing the core sample moves forward and exits from the packaging inner tube.

[0010] Preferably, in any embodiment, it further comprises:

[0011] A plug mounted on the front end of the piston rod;

[0012] The piston rod pushes the transparent core tube of the core sample packaging unit or the core sample contained in the transparent core tube forward through the plug.

[0013] Preferably, in any embodiment,

[0014] The front end of the piston rod is provided with an external thread for connecting to the plug;

[0015] The front end of the plug is flat and has an outer circular chamfer, which is used to push the transparent core tube or the core sample contained in the transparent core tube; the interior of the rear end of the plug is provided with an internal thread for connecting the piston rod of the core pushing cylinder; the plug is installed to the front end of the piston rod through the internal thread.

[0016] Preferably, in any embodiment,

[0017] The inner thread of the rear end of the core-pushing outer pipe joint is connected to the outer thread of the outer cylinder sleeve at the front part of the core-pushing oil cylinder.

[0018] Preferably, in any embodiment,

[0019] The outer thread of the core-pushing outer tube joint at its front end is connected to the inner thread of the rear portion of the core-pushing outer tube.

[0020] The core pushing device for multiple tube coring provided by the embodiment of the present invention can quickly and completely withdraw the core sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be discussed below. Obviously, the technical solutions described in conjunction with the drawings are only some embodiments of the present invention. For ordinary technicians in this field, other embodiments and their drawings can be obtained based on the embodiments shown in these drawings without paying any creative work.

[0022] Figure 1 Schematic diagram of the structure of a core pushing device for multiple tube coring according to an embodiment of the present invention.

[0023] Figure 2 Schematic diagram of the structure of the core pushing cylinder according to an embodiment of the present invention.

[0024] Figure 3 Schematic diagram of the structure of the core push outer tube according to an embodiment of the present invention.

[0025] Figure 4 Schematic diagram of the structure of a push-core outer pipe joint according to an embodiment of the present invention.

[0026] Figure 5 Schematic diagram of the structure of a core-pushing outer tube nut according to an embodiment of the present invention.

[0027] Figure 6 1 is a top view of a core-pushing outer tube nut according to an embodiment of the present invention.

[0028] Figure 7 Schematic diagram of the structure of a plug according to an embodiment of the present invention.

[0029] Figure 8 FIG. 4 is a top view of a plug according to an embodiment of the present invention. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions of various embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments described in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] An embodiment of the present invention provides a core pushing device for multiple tube coring, which can quickly and completely eject core samples.

[0032] According to an embodiment of the present invention, there is provided a core pushing device for coring multiple tubes, which comprises: a core pushing cylinder, a core pushing outer tube joint, a core pushing outer tube and a core pushing outer tube nut;

[0033] The core-pushing oil cylinder has an outer cylinder sleeve and a piston rod extending forward at its front end; the rear end of the outer cylinder sleeve is provided with an external thread for connecting to the core-pushing outer pipe joint, and the front end of the outer cylinder sleeve is provided with a first positioning step for positioning the core-pushing outer pipe joint; the front end of the first positioning step is connected to the piston rod;

[0034] The core-pushing outer tube is used to accommodate a core sample packaging unit of a multi-tube structure, and the core sample packaging unit includes a transparent core tube containing a core sample and a packaging inner tube sleeved outside the transparent core tube; the inner wall of the rear end of the core-pushing outer tube is provided with an internal thread for connecting to a core-pushing outer tube joint, and the front end of the core-pushing outer tube is provided with an external thread for connecting to a core-pushing outer tube nut;

[0035] The core-pushing outer tube joint is provided and connected between the front part of the core-pushing oil cylinder and the rear part of the core-pushing outer tube; an internal thread is provided on the inner wall of the rear end of the core-pushing outer tube joint for connecting with the external thread of the outer cylinder sleeve of the core-pushing oil cylinder, and an external thread is provided on the front end of the core-pushing outer tube joint for connecting with the internal thread of the rear end of the core-pushing outer tube; a second positioning step is provided on the inner wall of the front end of the core-pushing outer tube joint for positioning and fixing the rear end of the encapsulated inner tube outside the transparent core tube;

[0036] The core push outer tube nut has an inner thread on its rear end inner wall for connecting with the outer thread at the front end of the core push outer tube; a third positioning step is provided on its front end inner wall for abutting against the front end of the packaging inner tube of the core sample packaging unit;

[0037] Wherein, during the operation of the core pushing cylinder, the piston rod pushes the transparent core tube of the core sample packaging unit or the core sample contained in the transparent core tube forward, so that the transparent core tube containing the core sample moves forward and exits from the packaging inner tube.

[0038] In this way, the core sample packaging unit (which includes a transparent core tube containing the core sample and an encapsulation inner tube sleeved outside the transparent core tube) is installed in the core pushing outer tube, and its rear end (e.g., the transparent core tube or the core sample therein) is directly or indirectly connected to or abuts against the front end of the piston rod of the core pushing cylinder, while the edge of the encapsulation inner tube at its front end (e.g., the front end of the encapsulation inner tube) is abutted and positioned by the second positioning step of the core pushing outer tube joint. It should be noted that before performing the core pushing operation of withdrawing the transparent core tube from the encapsulation inner tube, the piston rod of the core pushing cylinder can be in a retracted state, for example, at this time the piston rod can be in its rearmost position.

[0039] When it is necessary to withdraw or take out the transparent core tube containing the core sample of the core sample packaging unit from the packaging inner tube, the core pushing cylinder moves the piston rod under the drive of the power source to push the transparent core tube or the core sample inside, so that the transparent core tube containing the core sample moves forward. Since the packaging inner tube sleeved outside the transparent core tube is positioned at its front end by the third positioning step in the core pushing outer tube nut, the packaging inner tube cannot move during the forward movement of the transparent core tube, thereby allowing the transparent core tube to move forward and withdraw from the packaging inner tube.

[0040] It should be understood here that when a forward pushing force is applied to the transparent core tube by the piston rod, the piston rod or other indirect force-applying components (such as the plug) only contacts the rear end of the transparent core tube, and does not contact the packaged inner tube placed outside the transparent core tube, thereby ensuring that the pushing force is only applied to the transparent core tube and drives it to withdraw from the packaged inner tube.

[0041] It can be seen that the core pushing device for multiple tube coring provided by the embodiment of the present invention can quickly and completely withdraw the core sample to avoid damage or destruction of the core sample.

[0042] The core pushing device for multiple-tube coring provided in an embodiment of the present invention can be widely used in advance geological coring for new railways, preliminary design geological surveys, and multiple-tube coring applications in other fields. It uses a hydraulic cylinder to apply core pushing power, which can not only effectively reduce or even eliminate the damage to the integrity of the core sample during core pushing, but also has the advantages of integration, lightweight, strong versatility, and rapid core pushing, thereby significantly improving the integrity of the core sample and the coring efficiency.

[0043] Preferably, in any embodiment, it further comprises:

[0044] A plug mounted on the front end of the piston rod;

[0045] The piston rod pushes the transparent core tube of the core sample packaging unit or the core sample contained in the transparent core tube forward through the plug.

[0046] Preferably, in any embodiment,

[0047] The front end of the piston rod is provided with an external thread for connecting to the plug;

[0048] The front end of the plug is flat and has an outer circular chamfer, which is used to push the transparent core tube or the core sample contained in the transparent core tube; the interior of the rear end of the plug is provided with an internal thread for connecting the piston rod of the core pushing cylinder; the plug is installed to the front end of the piston rod through the internal thread.

[0049] Preferably, in any embodiment,

[0050] The inner thread of the rear end of the core-pushing outer pipe joint is connected to the outer thread of the outer cylinder sleeve of the core-pushing oil cylinder.

[0051] Preferably, in any embodiment,

[0052] The outer thread at the front end of the core-pushing outer tube joint is connected to the inner thread at the rear end of the core-pushing outer tube.

[0053] Preferably, in any embodiment,

[0054] The core-pushing outer tube nut is mounted on the front end of the core-pushing outer tube through the internal thread at the rear end thereof.

[0055] Figure 1 2 is a schematic structural diagram of a core pushing device for multiple tube coring according to an embodiment of the present invention.

[0056] exist Figures 1 to 8 In the embodiment shown, a core pushing device for coring multiple tubes can be seen, which includes: a core pushing cylinder 101, a core pushing outer tube joint 102, a core pushing outer tube 103 and a core pushing outer tube nut 104;

[0057] The core-pushing oil cylinder 101 has an outer cylinder sleeve 111 and a piston rod 113 extending forward at its front end; the rear end of the outer cylinder sleeve 111 is provided with an external thread for connecting to the core-pushing outer pipe joint 102, and the front end of the outer cylinder sleeve 111 is provided with a first positioning step 112 for positioning the core-pushing outer pipe joint 102; the front end of the first positioning step 112 is connected to the piston rod 113;

[0058] The core-pushing outer tube 103 is used to accommodate a core sample packaging unit of a multi-tube structure, and the core sample packaging unit includes a transparent core tube containing a core sample and a packaging inner tube sleeved outside the transparent core tube; the inner wall of the rear end of the core-pushing outer tube 103 is provided with an internal thread for connecting to the core-pushing outer tube joint 102, and the front end of the core-pushing outer tube 103 is provided with an external thread for connecting to the core-pushing outer tube nut 104;

[0059] The core-pushing outer tube joint 102 is provided and connected between the front part of the core-pushing oil cylinder and the rear part of the core-pushing outer tube; the inner wall of the rear end of the core-pushing outer tube joint 102 is provided with an internal thread for connecting with the external thread of the outer cylinder sleeve 111 of the core-pushing oil cylinder 101, and the front end of the core-pushing outer tube joint 102 is provided with an external thread for connecting with the internal thread of the rear end of the core-pushing outer tube 103; the inner wall of the front end of the core-pushing outer tube joint 102 is provided with a second positioning step 121 for positioning and fixing the rear end of the encapsulated inner tube outside the transparent core tube;

[0060] The core push outer tube nut 104 has an internal thread on its rear end inner wall for connecting with the external thread at the front end of the core push outer tube 103; a third positioning step 141 is provided on its front end inner wall for abutting against the front end of the packaging inner tube of the core sample packaging unit;

[0061] During the operation of the core pushing cylinder 101, the piston rod 113 pushes the transparent core tube of the core sample packaging unit or the core sample contained in the transparent core tube forward, so that the transparent core tube containing the core sample moves forward and exits from the packaging inner tube.

[0062] In addition, in another specific embodiment of the present application, the core pushing device for multiple tube coring may further include:

[0063] A plug 105 is mounted on the front end of the piston rod 113;

[0064] The piston rod 113 pushes the transparent core tube of the core sample packaging unit or the core sample contained in the transparent core tube forward through the plug 105 .

[0065] In addition, in another specific embodiment of the present application,

[0066] The front end of the piston rod 113 is provided with an external thread for connecting to the plug 105;

[0067] The front end of the plug 105 is flat and has an outer circular chamfer, which is used to push the transparent core tube or the core sample contained in the transparent core tube; the interior of the rear end of the plug 105 is provided with an internal thread for connecting the piston rod 113 of the core pushing cylinder; the plug 105 is installed to the front end of the piston rod 113 through the internal thread.

[0068] The core pushing device for multiple tube coring provided by the embodiment of the present invention can quickly and completely withdraw the core sample.

[0069] It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment comprising a series of elements not only includes these elements, but also includes other elements not clearly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of further restrictions, the elements limited by the sentence "comprising a..." do not exclude the presence of other identical factors in the process, method, article or equipment comprising the elements.

[0070] In the description of multiple elements herein, multiple parallel features connected by "and / or" refer to one or more (or one or more) of these parallel features. For example, "a first element and / or a second element" means: one or more of the first element and the second element, that is, only the first element, or only the second element, or the first element and the second element (both exist at the same time).

[0071] It should be understood that the directional terms used herein, such as up, down, left, right, front, and rear, are intended solely to describe the relative positions of the relevant components and are not intended to limit the scope of protection of the present invention. For example, as one of ordinary skill in the art would understand, the terms front and rear refer to opposite directions, and the terms front and rear refer to opposite locations, which will not be further elaborated herein.

[0072] The various embodiments provided in the present invention can be combined with each other as needed. For example, the features of any two, three or more embodiments can be combined with each other to form a new embodiment of the present invention. This is also within the scope of protection of the present invention, unless otherwise specified or technically inconsistent and cannot be implemented.

[0073] The above description is merely an exemplary embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A core pushing device for multiple tube coring, characterized in that: include: Push core oil cylinder, push core outer tube joint, push core outer tube and push core outer tube nut; The core-pushing oil cylinder has an outer cylinder sleeve and a piston rod extending forward at its front end; the rear end of the outer cylinder sleeve is provided with an external thread for connecting to the core-pushing outer pipe joint, and the front end of the outer cylinder sleeve is provided with a first positioning step for positioning the core-pushing outer pipe joint; the front end of the first positioning step is connected to the piston rod; The core-pushing outer tube is used to accommodate a core sample packaging unit of a multi-tube structure, and the core sample packaging unit includes a transparent core tube containing a core sample and a packaging inner tube sleeved outside the transparent core tube; the inner wall of the rear end of the core-pushing outer tube is provided with an internal thread for connecting to a core-pushing outer tube joint, and the front end of the core-pushing outer tube is provided with an external thread for connecting to a core-pushing outer tube nut; The core-pushing outer tube joint is provided and connected between the front part of the core-pushing oil cylinder and the rear part of the core-pushing outer tube; an internal thread is provided on the inner wall of the rear end of the core-pushing outer tube joint for connecting with the external thread of the outer cylinder sleeve of the core-pushing oil cylinder, and an external thread is provided on the front end of the core-pushing outer tube joint for connecting with the internal thread of the rear end of the core-pushing outer tube; a second positioning step is provided on the inner wall of the front end of the core-pushing outer tube joint for positioning and fixing the rear end of the encapsulated inner tube outside the transparent core tube; The inner wall of the rear end of the core push outer tube nut is provided with an internal thread for connecting with the external thread at the front end of the core push outer tube; A third positioning step is provided on the inner wall of the front end thereof, for abutting against the front end of the packaging inner tube of the core sample packaging unit; Wherein, during the operation of the core pushing cylinder, the piston rod pushes the transparent core tube of the core sample packaging unit or the core sample contained in the transparent core tube forward, so that the transparent core tube containing the core sample moves forward and exits from the packaging inner tube.

2. The multi-tube impact coring device according to claim 1, characterized in that: Further including: A plug mounted on the front end of the piston rod; The piston rod pushes the transparent core tube of the core sample packaging unit or the core sample contained in the transparent core tube forward through the plug.

3. The multi-tube impact coring device according to claim 2, characterized in that: The front end of the piston rod is provided with an external thread for connecting to the plug; The front end of the plug is flat and has an outer circular chamfer, which is used to push the transparent core tube or the core sample contained in the transparent core tube; the interior of the rear end of the plug is provided with an internal thread for connecting the piston rod of the core pushing cylinder; the plug is installed to the front end of the piston rod through the internal thread.

4. The multi-tube impact coring device according to claim 1, characterized in that: The inner thread of the rear end of the core-pushing outer pipe joint is connected to the outer thread of the outer cylinder sleeve at the front part of the core-pushing oil cylinder.

5. The multi-tube impact coring device according to claim 1, characterized in that: The outer thread of the core-pushing outer tube joint at its front end is connected to the inner thread of the rear portion of the core-pushing outer tube.

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