Rock mechanics experiment sample delivery device and method thereof

Abstract

The invention discloses a rock mechanics experiment sample delivery device and method, and belongs to the technical field of oil and gas exploitation. A rock mechanics experiment sample delivery device comprises a confining pressure chamber; the delivery part is used for delivering an experimental sample to an inlet close to the confining pressure chamber; the pushing part is used for pushing the experimental sample close to the inlet of the confining pressure chamber into the confining pressure chamber. According to the rock mechanics experiment sample delivery device provided by the invention, delivery of the experiment sample is completed through the independent delivery part, the experiment sample delivered to the inlet of the confining pressure chamber is pushed into the confining pressure chamber through the independent pushing part, delivery operation of the experiment sample entering the confining pressure chamber is completed, automatic delivery of the sample can be realized, and the labor intensity of workers is reduced. The whole device is high in automation degree, and testing efficiency is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas exploitation, and in particular to a rock mechanics experimental sample delivery device and method thereof. Background Art

[0002] In the process of oil and gas exploration and development, rock mechanics parameters are key indicators for formulating drilling and completion and oil and gas field development plans. These parameter values ​​reflect the mechanical properties of underground reservoir rocks and are the basic data for calculating ground stress and formation pressure. They also provide an effective basis for drill bit selection and drilling parameter optimization. Rock mechanics experiments on field cores are an effective means to obtain rock parameters such as elastic modulus, Poisson's ratio, and compressive strength.

[0003] As one of the most precious materials for basic oil and gas research, rock cores play a vital role in the oil and gas drilling industry and are the most direct way for technicians to understand the characteristics of underground rocks. Among the related technologies, the core technologies of advanced rock mechanics are currently monopolized by foreign instrument manufacturers, which restricts the development of related independent technologies. As domestic oil and gas exploration gradually goes deeper, the study of formation mechanical properties becomes more and more important. At present, China uses rock cores for mechanical experiments to obtain rock mechanics parameter values. When testing with rock mechanics instruments, manual sample loading and sealing are often required, which takes a lot of time, has a low degree of automation, and has low test efficiency. Summary of the invention

[0004] The object of the present invention is to provide a rock mechanics experimental sample delivery device and method thereof, so as to solve the problems of low automation and low test efficiency when testing by a rock mechanics instrument.

[0005] The technical solution of the present invention to solve the above technical problems is as follows:

[0006] In one aspect, the present invention provides a rock mechanics experiment sample delivery device, comprising:

[0007] Confining chamber;

[0008] A delivery component, used for delivering the experimental sample to an entrance close to the confining pressure chamber;

[0009] The pushing component pushes the test sample near the entrance of the confining pressure chamber into the confining pressure chamber.

[0010] Furthermore, in the rock mechanics experimental sample delivery device, the top of the confining pressure chamber is connected to a top plate, and a sample delivery hole for the experimental sample to enter the confining pressure chamber is opened on the top plate.

[0011] Furthermore, in the rock mechanics experiment sample delivery device, an inflatable rubber sleeve for accommodating samples is also provided in the confining pressure chamber, one end of the rubber sleeve is connected to the bottom end of the top plate and communicated with the sample delivery hole, and the other end of the rubber sleeve is connected to the bottom of the confining pressure chamber.

[0012] Furthermore, in the rock mechanics experimental sample delivery device, the delivery component includes: a sample delivery plate, the sample delivery plate is arranged above the confining pressure chamber, and a plurality of sample storage holes for storing experimental samples are opened on the sample delivery plate, and the experimental samples enter the confining pressure chamber from the sample storage holes.

[0013] Furthermore, in the rock mechanics experiment sample delivery device, the sample delivery plate is connected to a power component for driving the sample delivery plate to move;

[0014] Preferably, the sample delivery tray is in the shape of a square column, and the power assembly drives the sample delivery tray to translate;

[0015] Preferably, the sample delivery tray is cylindrical in shape, and the power assembly drives the sample delivery tray to rotate.

[0016] Furthermore, in the rock mechanics experimental sample delivery device, the pushing component includes: an upper pressure head and a lower pressure head, the upper pressure head is arranged above the outer side of the confining pressure chamber, and the lower pressure head is arranged at the bottom inner side of the confining pressure chamber, and the upper pressure head passes through the entrance of the confining pressure chamber and enters into the confining pressure chamber to push the experimental sample downward to contact the lower pressure head.

[0017] Furthermore, in the rock mechanics experimental sample delivery device, the end of the upper pressure head away from the confining pressure chamber is connected to an axial piston rod for pushing the upper pressure head to reciprocate up and down, and the center lines of the axial piston rod, the upper pressure head and the lower pressure head are on the same straight line.

[0018] Furthermore, in the rock mechanics experimental sample delivery device, the rock mechanics experimental sample delivery device also includes a sample delivery component, and the sample delivery component includes: a sampler and an automatic loading and unloading arm, the automatic loading and unloading arm is connected to the sampler, and the automatic loading and unloading arm controls the sampler to enter the rubber sleeve to take out the experimental sample;

[0019] Preferably, the sample delivery component further comprises a sample suction cup, and the sample suction cup is connected to an end of the sampler away from the automatic loading and unloading arm.

[0020] Another aspect of the present invention is to provide a method for delivering rock mechanics experimental samples, which uses the above-mentioned rock mechanics experimental sample delivery, comprising:

[0021] Start the power assembly to move the sample delivery plate containing the experimental sample to the top plate, and align the sample storage hole with the sample delivery hole;

[0022] The axial piston rod is started to drive the upper pressure head to push the experimental sample in the sample storage hole from the sample delivery hole into the confining pressure chamber, and the upper pressure head and the lower pressure head contact with the experimental sample to complete the delivery.

[0023] Furthermore, in the rock mechanics experimental sample delivery method, after the test is completed, the automatic loading and unloading arm is started to control the sampler to enter the rubber sleeve to take out the experimental sample and suck out the remaining debris.

[0024] The present invention has the following beneficial effects:

[0025] The rock mechanics experimental sample delivery device provided by the present invention completes the delivery of the experimental sample through a separate delivery component, and pushes the experimental sample located at the entrance of the confining pressure chamber into the confining pressure chamber through a separate pushing component, thereby completing the delivery operation of the experimental sample into the confining pressure chamber, and can realize automatic delivery of the sample. The entire device has a high degree of automation, and the test efficiency is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0027] Figure 1 It is a structural schematic diagram of the rock mechanics experiment sample delivery device of the present invention;

[0028] Figure 2 It is a top schematic diagram of a cylindrical sample delivery plate in a rock mechanics experiment sample delivery device of the present invention;

[0029] Figure 3 The present invention is a flow chart of the rock mechanics experimental sample delivery method.

[0030] Marks and corresponding parts names in the attached drawings:

[0031] In the figure: 10-confining pressure chamber, 11-top plate, 12-sample delivery hole, 13-rubber sleeve, 21-sample delivery plate, 22-sample storage hole, 23-power assembly, 31-upper pressure head, 32-lower pressure head, 33-axial piston rod, 41-sampler, 42-automatic loading and unloading arm. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of 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.

[0034] Example 1

[0035] Please refer to Figure 1 The embodiment of the present invention provides a rock mechanics experiment sample delivery device, comprising:

[0036] Confining pressure chamber 10;

[0037] A delivery component, used for delivering the experimental sample to the entrance close to the confining pressure chamber 10;

[0038] The pushing component pushes the test sample near the entrance of the confining pressure chamber 10 into the confining pressure chamber 10 .

[0039] In the rock mechanics experimental sample delivery device provided by the present invention, the delivery of the experimental sample is completed by a separate delivery component, and the experimental sample located at the entrance of the confining pressure chamber is pushed into the confining pressure chamber by a separate pushing component to complete the delivery operation of the experimental sample into the confining pressure chamber. Automatic delivery of the sample can be achieved, the entire device has a high degree of automation, and the test efficiency is effectively improved.

[0040] Furthermore, the top of the confining pressure chamber 10 is connected to a top plate 11, and a sample delivery hole 12 for the experimental sample to enter the confining pressure chamber 10 is opened on the top plate 11. The confining pressure chamber 10 is composed of a bottom plate and a side plate, and the bottom edge of the top plate 11 is connected to the top of the confining pressure chamber 10. The confining pressure chamber 10 encloses a space for storing confining pressure oil. During the test, the confining pressure chamber 10 can always be in a full oil state, and there is no need to fill the oil before each test and drain the oil after the test, which avoids the time consumption of filling / draining the oil and effectively improves the test efficiency.

[0041] In principle, the present invention has no particular restrictions on the specific selection of the aperture of the sample delivery hole 12, and those skilled in the art can select and adjust it according to the application situation to adapt to the delivery of samples of various sizes.

[0042] Furthermore, an inflatable rubber sleeve 13 for accommodating samples is also provided in the confining pressure chamber 10, one end of the rubber sleeve 13 is connected to the bottom end of the top plate 11 and is connected to the sample delivery hole 12, and the other end of the rubber sleeve 13 is connected to the bottom of the confining pressure chamber 10. Furthermore, the other end of the rubber sleeve 13 is connected to the lower pressure head 32.

[0043] In actual use, the rubber sleeve 13 can be fixedly connected between the top plate 11 and the lower pressure head 32 by a fixing part, so that the rubber sleeve 13 does not need to be removed or installed each time the sample is taken out, and manual sealing of the sample can be avoided, thereby improving the test efficiency. The rubber sleeve 13 is made of a special material that meets the laboratory requirements and can be used repeatedly for a long time. The connection between the rubber sleeve 13 and the top plate 11, as well as the rubber sleeve 13 and the lower pressure head 32 are firm and well sealed, which can isolate the sample from the confining pressure oil. At the same time, the rubber sleeve 13 can withstand high pressure and high temperature after being attached to the experimental sample, and has a certain toughness and elasticity to ensure that the sample is not damaged.

[0044] In principle, the present invention has no particular restrictions on the specific selection of the diameter of the rubber sleeve 13. Those skilled in the art can select and adjust it according to the application to adapt to the delivery of samples of various sizes. In order to facilitate processing and meet the sample size requirements, the diameter of the rubber sleeve 13 is set to the same size as the aperture of the sample delivery hole 12.

[0045] The present invention adopts an inflatable rubber sleeve 13, which can be inflated to make it swell and fit on the hole wall of the sample storage hole 22. After the inflatable rubber sleeve 13 is inflated, it is also convenient to put the sample into the inflatable rubber sleeve 13.

[0046] Furthermore, the delivery component includes: a sample delivery tray 21, which is arranged above the confining pressure chamber 10, and has a plurality of sample storage holes 22 for storing experimental samples. The experimental samples enter the confining pressure chamber 10 from the sample storage holes 22.

[0047] Furthermore, the sample delivery tray 21 is connected to a power assembly 23 for driving the sample delivery tray 21 to move;

[0048] Preferably, the sample delivery tray 21 is in the shape of a square column, and the power assembly 23 drives the sample delivery tray 21 to translate;

[0049] Please refer to Figure 2 Preferably, the sample delivery tray 21 is cylindrical, and the power assembly 23 drives the sample delivery tray 21 to rotate. Figure 2In the example, a plurality of sample storage holes 22 for accommodating experimental samples are evenly arranged on the sample delivery plate 21. The power assembly 23 drives the sample delivery plate 21 to rotate to the opposite end of the sample storage hole 22 and the sample delivery hole 12. The upper pressure head above is started to push the experimental sample downward from the sample storage hole 22, and the sample sample enters the confining pressure chamber 10 through the sample delivery hole 12.

[0050] In the present invention, the sample delivery tray 21 is arranged above the top tray 11 , and may be close to the top tray 11 , or may have a certain vertical distance from the top tray 11 of the confining pressure chamber 10 , so that the sample can smoothly enter the rubber sleeve 13 .

[0051] The shape of the sample delivery tray 21 can be a square column shape or a cylindrical shape. The number of sample storage holes 22 set on the sample delivery tray 21 can be one or more. When the sample delivery tray 21 is a cube, the sample storage hole 22 can be set at any position on the sample delivery tray 21. The power component 23 can control the sample delivery tray 21 to translate so that the predetermined sample storage hole 22 is opposite to the sample delivery hole 12, which is convenient for sample delivery. When the sample delivery tray 21 is cylindrical and the number of sample storage holes 22 is multiple, the multiple sample storage holes 22 can be evenly distributed on the sample delivery tray 21, and can be evenly distributed along the circumference of the sample delivery tray 21. At this time, the power component 23 can control the sample delivery tray 21 to rotate in a plane so that the predetermined sample storage hole 22 is opposite to the sample delivery hole 12, which is convenient for sample delivery.

[0052] When the power assembly 23 controls the sample storage hole 22 and the sample delivery hole 12 at the opposite ends, the axial piston rod 33 controls the upper pressure head 31 to move downward to contact the experimental sample, and pushes the sample to move from the sample delivery hole 12 into the confining pressure chamber 10, and further contact the lower pressure head 32, thereby realizing automatic sample delivery, with a high degree of automation and improved test efficiency.

[0053] Furthermore, the pushing component includes: an upper pressure head 31 and a lower pressure head 32, the upper pressure head 31 is arranged above the outer side of the confining pressure chamber 10, and the lower pressure head 32 is arranged at the bottom inside the confining pressure chamber 10, the upper pressure head 31 passes through the entrance of the confining pressure chamber 10 and enters the confining pressure chamber 10 to contact the lower pressure head 32 that pushes the experimental sample downward.

[0054] The upper pressure head 31 and the lower pressure head 32 are matched with each other, and the size and dimensions of the upper pressure head 31 and the lower pressure head 32 can be reasonably adjusted according to the size and shape of the experimental sample to achieve good contact between the upper pressure head 31 and the lower pressure head 32 and the experimental sample.

[0055] Furthermore, one end of the upper pressure head 31 away from the confining pressure chamber 10 is connected to an axial piston rod 33 for pushing the upper pressure head 31 to reciprocate up and down, and the center lines of the axial piston rod 33, the upper pressure head 31 and the lower pressure head 32 are on the same straight line.

[0056] Furthermore, the rock mechanics experimental sample delivery device also includes a sample delivery component, which includes: a sampler 41 and an automatic loading and unloading arm 42, the automatic loading and unloading arm 42 is connected to the sampler 41, and the automatic loading and unloading arm 42 controls the sampler 41 to enter the rubber sleeve 13 to take out the experimental sample. The automatic loading and unloading arm 42 is also connected to the power assembly 23, and is used to start the power assembly 23.

[0057] Preferably, the sample delivery component further comprises a sample suction cup, and the sample suction cup is connected to one end of the sampler 41 away from the automatic loading and unloading arm 42 .

[0058] After the test is finished, the automatic loading and unloading arm 42 can control the sampler 41 to go down into the rubber sleeve 13 to take out the sample. A sample suction cup is arranged at one end of the sampler 41 away from the automatic loading and unloading arm 42, so that the sample can be sucked out of the rubber sleeve 13 more conveniently. At the same time, the sample suction cup will also suck out the sample debris from the rubber sleeve 13, playing the role of cleaning the rubber sleeve 13.

[0059] Example 2

[0060] Please follow Figure 3 The present invention further provides a rock mechanics experimental sample delivery method, which adopts the rock mechanics experimental sample delivery method described in Example 1, comprising:

[0061] Step 1: Start the power assembly 23 to move the sample delivery plate containing the experimental sample to the top plate 11, and align the sample storage hole 22 with the sample delivery hole 12;

[0062] When the sample delivery tray 21 is in a square column shape, the sample delivery tray 21 is controlled to translate by the power assembly 23 so that the target sample storage hole 22 on the sample delivery tray 21 is opposite to the sample delivery hole 12 on the top plate 11 .

[0063] When the sample delivery tray 21 is cylindrical, the power assembly 23 controls the sample delivery tray 21 to rotate, so that the sample delivery tray 21 rotates to the opposite end between the target sample storage hole 22 and the sample delivery hole 12 .

[0064] Step 2: Start the axial piston rod 33 to drive the upper pressure head 31 to push the experimental sample in the sample storage hole 22 from the sample delivery hole 12 into the confining pressure chamber 10, and the upper pressure head 31 and the lower pressure head 32 contact the experimental sample to achieve sample delivery.

[0065] Step 3: After the test is completed, the automatic loading and unloading arm 42 is started to control the sampler 41 to enter the rubber sleeve 13 to take out the test sample and suck out the remaining debris.

[0066] The rock mechanics experimental sample delivery method provided by the present invention completes the delivery of the experimental sample through the cooperation of the power component and the sample delivery plate, and pushes the experimental sample into the confining pressure chamber to contact the lower pressure head through the cooperation of the axial piston rod and the upper pressure head. The entire delivery method can automatically complete the delivery operation of the experimental sample into the confining pressure chamber, and can realize automatic delivery of the sample. After the test is completed, the experimental sample can also be taken out by the cooperation of the automatic loading and unloading arm and the sampler. The entire device has a high degree of automation, which effectively improves the test efficiency.

[0067] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of 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 rock mechanics experimental sample delivery device, characterized in that: include: Confining chamber (10); A delivery component, used for delivering the experimental sample to an entrance close to the confining pressure chamber (10); A pushing component pushes the experimental sample near the entrance of the confining pressure chamber (10) into the confining pressure chamber (10).

2. The rock mechanics experimental sample delivery device according to claim 1 is characterized in that: The top of the confining pressure chamber (10) is connected to a top plate (11), and a sample delivery hole (12) for the experimental sample to enter the confining pressure chamber (10) is opened on the top plate (11).

3. The rock mechanics experimental sample delivery device according to claim 2 is characterized in that: The confining pressure chamber (10) is also provided with an inflatable rubber sleeve (13) for accommodating samples, one end of the rubber sleeve (13) is connected to the bottom end of the top plate (11) and communicates with the sample delivery hole (12), and the other end of the rubber sleeve (13) is connected to the bottom of the confining pressure chamber (10).

4. The rock mechanics experimental sample delivery device according to claim 1 is characterized in that: The delivery component comprises: a sample delivery tray (21), the sample delivery tray (21) being arranged above the confining pressure chamber (10), and a plurality of sample storage holes (22) for storing experimental samples being provided on the sample delivery tray (21), and the experimental samples entering the confining pressure chamber (10) through the sample storage holes (22).

5. The rock mechanics experiment sample delivery device according to claim 4 is characterized in that: The sample delivery tray (21) is connected to a power assembly (23) for driving the sample delivery tray (21) to move; Preferably, the sample delivery tray (21) is in the shape of a square column, and the power assembly (23) drives the sample delivery tray (21) to translate; Preferably, the sample delivery tray (21) is cylindrical in shape, and the power assembly (23) drives the sample delivery tray (21) to rotate.

6. The rock mechanics experimental sample delivery device according to claim 1, characterized in that: The pushing component comprises: an upper pressure head (31) and a lower pressure head (32); the upper pressure head (31) is arranged above the outer side of the confining pressure chamber (10); the lower pressure head (32) is arranged at the inner bottom of the confining pressure chamber (10); the upper pressure head (31) passes through the entrance of the confining pressure chamber (10) and enters into the confining pressure chamber (10) to push the test sample downward to contact the lower pressure head (32).

7. The rock mechanics experiment sample delivery device according to claim 6, characterized in that: An end of the upper pressure head (31) away from the confining pressure chamber (10) is connected to an axial piston rod (33) for pushing the upper pressure head (31) to perform up and down reciprocating motion, and the center lines of the axial piston rod (33), the upper pressure head (31) and the lower pressure head (32) are on the same straight line.

8. The rock mechanics experiment sample delivery device according to claim 7, characterized in that: The rock mechanics experimental sample delivery device also includes a sample delivery component, which includes: a sampler (41) and an automatic loading and unloading arm (42), wherein the automatic loading and unloading arm (42) is connected to the sampler (41), and the automatic loading and unloading arm (42) controls the sampler (41) to enter the rubber sleeve (13) to take out the experimental sample; Preferably, the sample delivery component further comprises a sample suction cup, and the sample suction cup is connected to an end of the sampler (41) away from the automatic loading and unloading arm (42).

9. A method for delivering rock mechanics experimental samples, characterized in that: The rock mechanics experimental sample delivery method according to any one of claims 1 to 8 comprises: Start the power assembly to move the sample delivery plate containing the experimental sample to the top plate, and align the sample storage hole with the sample delivery hole; The axial piston rod is started to drive the upper pressure head to push the experimental sample in the sample storage hole from the sample delivery hole into the confining pressure chamber, and the upper pressure head and the lower pressure head contact with the experimental sample to complete the delivery.

10. The rock mechanics experimental sample delivery method according to claim 9, characterized in that: After the test is completed, the automatic loading and unloading arm is started to control the sampler to enter the rubber sleeve to take out the test sample and suck out the remaining debris.

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