Signal transmission device, rock testing system, signal line sealing device and method

Abstract

The present invention discloses a signal transmission device, a rock testing system, a signal line sealing device and a method, and relates to the technical field of linear object sealing. The signal line sealing device comprises: a sealing base, a pressure-resistant pipeline and a joint; the sealing base is provided with a first hole along the length direction, a second hole penetrating the fracturing chamber wall is provided on the fracturing chamber wall, one end of the pressure-resistant pipeline is provided on the sealing base for being fixedly arranged in the second hole, and a joint is fixedly arranged on the other end of the sealing base, the joint is used to be electrically connected to one end of the signal line, and the joint can seal the signal line in the first hole, the pressure-resistant pipeline is used to be sleeved outside the signal line and the pressure-resistant pipeline is penetrated into the second hole, and the other end of the signal line passes through the sealing base and the pressure-resistant pipeline to be connected with external equipment. The technical solution provided by the present invention can ensure that the signal line will not be damaged even if it works in a high temperature and high pressure environment, and the signal line will not move outside the fracturing chamber.

Description

Technical Field

[0001] The present invention relates to the technical field of linear object sealing, and in particular to a signal transmission device, a rock testing system, a signal line sealing device and a method. Background Art

[0002] At present, the signal lines in most domestic rock triaxial testing systems are sealed directly with wire harness seals. This structure can only be used under temperature and pressure conditions where the pressure is not more than 60MPa and the temperature is not higher than 120℃. When the pressure in the fracturing chamber exceeds 60MPa and the temperature is higher than 120℃, the wire harness seal cannot be used because the wire harness seal may squeeze the PTFE wrapping layer of the signal line under high temperature and high pressure conditions, which may easily cause damage to the PTFE wrapping layer and reduce its sealing performance. At the same time, due to the increase in internal pressure, the axial force acting on the signal line may cause the signal line to move out of the fracturing chamber. Summary of the invention

[0003] The object of the present invention is to provide a signal transmission device, a rock testing system, a signal line sealing device and a method to solve the problems existing in the above-mentioned prior art, so that the signal line will not be damaged in a high temperature and high pressure environment, and the signal line will not move out of the fracturing chamber.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention provides a signal line sealing device, comprising: a sealing base, a pressure-resistant pipeline and a joint; the sealing base is provided with a first hole along the length direction, the first hole penetrates the sealing base, one end of the pressure-resistant pipeline is fixedly arranged on the first hole wall and is coaxial with the first hole, the fracturing chamber wall is provided with a second hole penetrating the fracturing chamber wall, the sealing base is provided with one end of the pressure-resistant pipeline for being fixedly arranged in the second hole, the other end of the sealing base is fixedly provided with the joint, the joint is used to be electrically connected to one end of the signal line, and the joint can seal the signal line in the first hole, the pressure-resistant pipeline is used to be sleeved outside the signal line and the pressure-resistant pipeline is passed through the second hole, and the other end of the signal line passes through the sealing base and the pressure-resistant pipeline to be connected with external equipment.

[0006] Preferably, the connector includes a connector body, a copper column and a sealing device, a receiving portion is formed between the connector body and the sealing base, the sealing device is in the shape of a sleeve, the two ends of the copper column are respectively connected to the connector body and the signal line, the sealing device is sleeved on the copper column and completely seals the outer wall of the copper column, the sealing device is an insulator, the sealing device is fixed in the receiving portion, and the sealing device and the copper column can seal one end of the first hole.

[0007] Preferably, the sealing device comprises an upper insulating pressure pad, a lower insulating pressure pad and a sealing pad, the upper insulating pressure pad, the lower insulating pressure pad and the sealing pad are all sleeve-shaped, the lower insulating pressure pad, the sealing pad and the upper insulating pressure pad are sequentially sleeved on the copper column in a direction away from the fracturing chamber wall, the sealing pad and the copper column have an interference fit, and the upper insulating pressure pad and the lower insulating pressure pad have a clearance fit with the copper column;

[0008] The first hole is a stepped hole, comprising a large hole and a small hole, the large hole being arranged at one end of the sealing base where the joint is fixedly arranged, the lower insulating pressure, the sealing pad and the upper insulating pressure pad being arranged in the large hole, the sealing pad and the large hole being interference fit, the lower insulating pressure and the upper insulating pressure pad being gap fit with the large hole, and the joint being able to press and fix the lower insulating pressure, the sealing pad and the upper insulating pressure pad in the large hole.

[0009] Preferably, it also includes a pipeline sealing gasket, which is a sleeve-shaped pipeline sealing gasket, and the pipeline sealing gasket is sleeved on the pressure-resistant pipeline in the second hole, and the second hole and the pressure-resistant pipeline are both interference fit with the pipeline sealing gasket.

[0010] Preferably, it also includes a pressure cap, an upper pipeline pressure pad and a lower pipeline pressure pad, wherein the upper pipeline pressure pad and the lower pipeline pressure pad are both sleeve-shaped, and the upper pipeline pressure pad, the pipeline sealing pad and the lower pipeline pressure pad are sequentially sleeved on the pressure-resistant pipeline in a direction away from the inner cavity of the fracturing chamber, and the upper pipeline pressure pad and the lower pipeline pressure pad are gap-matched with the pressure-resistant pipeline;

[0011] A circumferential protrusion is provided in the second hole, and the pipeline upper pressure pad, the pipeline sealing pad and the pipeline lower pressure pad are arranged in the part of the second hole away from the inner cavity of the fracturing chamber, and the pressure cap can press the pipeline upper pressure pad, the pipeline sealing pad and the pipeline lower pressure pad onto the protrusion.

[0012] Preferably, the joint is threadedly connected to the sealing base, and the joint is tightened or loosened along the length direction of the sealing base.

[0013] Preferably, the pressure cap is threadedly connected to an end of the second hole away from the inner cavity of the fracturing chamber, and the pressure cap is tightened or loosened along the axial direction of the pressure-resistant pipeline.

[0014] The present invention also provides a signal transmission device, comprising a signal line and the signal line sealing device as described above, wherein the signal line in the fracturing chamber is sealed in the first hole and the pressure-resistant pipeline through the joint.

[0015] The present invention also provides a rock testing system, comprising the signal transmission device as described above.

[0016] The present invention also provides a signal line sealing method based on the signal line sealing device as described above, comprising the following steps:

[0017] Step 1: pre-fix the pressure-resistant pipeline in the first hole;

[0018] Step 2: Pass one end of the signal line through the pressure-resistant pipeline and the first hole and connect it to the connector;

[0019] Step 3: fix the joint to the sealing base, and the joint can seal one end of the first hole;

[0020] Step 4: Fix the end of the sealing base away from the joint into the second hole.

[0021] Compared with the prior art, the present invention has achieved the following technical effects:

[0022] The present invention discloses a signal transmission device, a rock testing system, a signal line sealing device and a method, wherein the signal line sealing device comprises: a sealing base, a pressure-resistant pipeline and a joint; a second hole penetrating the wall of the fracturing chamber is provided on the sealing base, one end of the pressure-resistant pipeline is provided for being fixedly arranged in the second hole, and a joint is fixedly arranged at the other end of the sealing base, the joint is used to be electrically connected to one end of the signal line, and the joint can seal the signal line in the first hole, the pressure-resistant pipeline is used to be sleeved outside the signal line and the pressure-resistant pipeline is penetrated in the second hole, and the other end of the signal line passes through the sealing base and the pressure-resistant pipeline to be connected with external equipment. The above technical scheme seals and fixes the signal line in the first hole and the pressure-resistant pipeline in the sealing base through the joint, so that the signal line is isolated from the fracturing chamber, ensuring that the signal line will not be damaged due to excessive pressure, and will not move out of the fracturing chamber under pressure. Therefore, the technical scheme provided by the present invention can ensure that the signal line will not be damaged even if it works in a high temperature and high pressure environment, and the signal line will not move out of the fracturing chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] 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 will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of the structure in which a connector in the signal line sealing device provided in the first embodiment is installed on a sealing base;

[0025] Figure 2A schematic diagram of the structure of the pressure cap in the signal line sealing device provided in the first embodiment sealing the pressure-resistant pipeline in the wall of the fracturing chamber;

[0026] Figure 3 A schematic diagram of the structure of the signal transmission device provided in the second embodiment installed on the wall of the fracturing chamber;

[0027] In the figure: 1-connector body, 2-sealing pad, 3-sealing base, 4-upper insulating pressure pad, 5-copper column, 6-lower insulating pressure pad, 7-pressure-resistant pipeline, 8-pipeline upper pressure pad, 9-pipeline sealing pad, 10-pipeline lower pressure pad, 11-fracturing chamber wall, 12-pressure cap, 13-signal line. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0029] The purpose of the present invention is to provide a signal transmission device, a rock testing system, a signal line sealing device and a method to solve the problems existing in the prior art. The technical solution provided by the present invention can ensure that the signal line will not be damaged even if it works in a high temperature and high pressure environment, and the signal line will not move outside the fracturing chamber.

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Embodiment 1

[0032] This embodiment provides a signal line sealing device, such as Figures 1 to 3As shown, it includes: a sealing base 3, a pressure-resistant pipeline 7 and a joint; the sealing base 3 is provided with a first hole along the length direction, the first hole penetrates the sealing base 3, one end of the pressure-resistant pipeline 7 is fixedly arranged on the first hole wall and is coaxial with the first hole, the fracturing chamber wall 11 is provided with a second hole penetrating the fracturing chamber wall 11, the sealing base 3 is provided with one end of the pressure-resistant pipeline 7 for being fixedly arranged in the second hole, and the other end of the sealing base 3 is fixedly provided with a joint, the joint is used to be electrically connected to one end of the signal line 13, and the joint can seal the signal line 13 in the first hole, the pressure-resistant pipeline 7 is used to be sleeved outside the signal line 13 and the pressure-resistant pipeline Line 7 is passed through the second hole, the pressure-resistant pipeline 7 can be fixed in the second hole, and the other end of the signal line 13 passes through the sealing base 3 and the pressure-resistant pipeline 7 to be connected to the external equipment. In this scheme, the signal line 13 is sealed and fixed in the first hole in the sealing base 3 and the pressure-resistant pipeline 7 through a joint, so that the signal line 13 is isolated from the fracturing chamber, ensuring that the signal line 13 will not be damaged due to excessive pressure, and will not move out of the fracturing chamber due to pressure. Therefore, the technical solution provided by the present invention can ensure that the signal line 13 will not be damaged even if it works in a high temperature and high pressure environment, and the signal line 13 will not move out of the fracturing chamber.

[0033] Furthermore, the connector includes a connector body 1, a copper column 5 and a sealing device. An accommodating portion is formed between the connector body 1 and the sealing base 3. The sealing device is in the shape of a sleeve. The two ends of the copper column 5 are respectively connected to the connector body 1 and the signal line 13. The copper column 5 can transmit signals. The sealing device is sleeved on the copper column 5 and completely seals the outer wall of the copper column 5. The sealing device can fix the copper column 5 on the connector body 1. The sealing device is an insulator. The sealing device can prevent the copper column 5 from leaking signals when transmitting signals, thereby ensuring that the measured values ​​are more accurate. The sealing device is fixed in the accommodating portion. The sealing device and the copper column 5 can seal one end of the first hole, so that the first hole and the signal line 13 in the pressure-resistant pipeline 7 will not be damaged by too much pressure.

[0034] Furthermore, the sealing device includes an upper insulating pad 4, a lower insulating pad 6 and a sealing pad 2, the upper insulating pad 4, the lower insulating pad 6 and the sealing pad 2 are all sleeve-shaped, the lower insulating pad 6, the sealing pad 2 and the upper insulating pad 4 are sequentially sleeved on the copper column 5 in a direction away from the fracturing chamber wall 11, the sealing pad 2 and the copper column 5 are interference fit, the upper insulating pad 4 and the lower insulating pad 6 are gap fit with the copper column 5, the sealing pad 2 has a certain elasticity and can undergo slight elastic deformation, the upper insulating pad 4 and the lower insulating pad 6 have better rigidity than the sealing pad 2, so the pressure applied by the joint body 1 can be better concentrated on the sealing pad 2, so that the sealing pad 2 can better fix and seal the copper column 5;

[0035] The first hole is a stepped hole, which includes a large hole and a small hole. The large hole is arranged at one end of the sealing base 3 where a joint is fixedly arranged. The lower insulating pressure, the sealing pad 2 and the upper insulating pressure pad 4 are arranged in the large hole. The sealing pad 2 and the large hole have an interference fit, and the lower insulating pressure and the upper insulating pressure pad 4 have a gap fit with the large hole. The joint can press and fix the lower insulating pressure, the sealing pad 2 and the upper insulating pressure pad 4 in the large hole.

[0036] Furthermore, it also includes a pipeline sealing gasket 9, which is a sleeve-shaped pipeline sealing gasket 9. The pipeline sealing gasket 9 is sleeved on the pressure-resistant pipeline 7 in the second hole. The second hole and the pressure-resistant pipeline 7 are both interference fit with the pipeline sealing gasket 9. The pipeline sealing gasket 9 can clamp the pressure-resistant pipeline 7 on the fracturing chamber wall 11, and the pipeline sealing gasket 9 can prevent the pressure in the fracturing chamber from leaking out.

[0037] Furthermore, it also includes a pressure cap 12, an upper pipeline pressure pad 8 and a lower pipeline pressure pad 10. The upper pipeline pressure pad 8 and the lower pipeline pressure pad 10 are both sleeve-shaped. The upper pipeline pressure pad 8, the pipeline sealing pad 9 and the lower pipeline pressure pad 10 are sequentially sleeved on the pressure-resistant pipeline 7 in a direction away from the inner cavity of the fracturing chamber. The upper pipeline pressure pad 8 and the lower pipeline pressure pad 10 are clearance-matched with the pressure-resistant pipeline 7. The pipeline sealing pad 9 has a certain elasticity and can undergo slight elastic deformation. The upper pipeline pressure pad 8 and the lower pipeline pressure pad 10 have better rigidity than the pipeline sealing pad 9. Therefore, the pressure applied by the pressure cap 12 can be better concentrated on the pipeline sealing pad 9, so that the pipeline sealing pad 9 can better fix the pressure-resistant pipeline 7 and better prevent the pressure inside the fracturing chamber from leaking out.

[0038] A circumferential protrusion is provided in the second hole, and the pipeline upper pressure pad 8, pipeline sealing pad 9 and pipeline lower pressure pad 10 are arranged in the part of the second hole away from the inner cavity of the fracturing chamber, and the pressure cap 12 can press the pipeline upper pressure pad 8, pipeline sealing pad 9 and pipeline lower pressure pad 10 onto the protrusion.

[0039] Furthermore, the joint is threadedly connected to the sealing base 3, and the joint is tightened or loosened along the length direction of the sealing base 3. The staff adjusts the sealing and tightening degree of the copper column 5 of the device by adjusting the screw-in depth of the joint body 1. The deeper the screw-in depth of the joint body 1, the tighter the copper column 5 in the device and the better the sealing.

[0040] Furthermore, the pressure cap 12 is threadedly connected to the end of the second hole away from the inner cavity of the fracturing chamber. The pressure cap 12 is tightened or loosened along the axial direction of the pressure-resistant pipeline 7. The staff adjusts the tightness of the pipeline sealing gasket 9 to the pressure-resistant pipeline 7 and the sealing degree of the fracturing chamber by adjusting the depth of the pressure cap 12 screwed into the fracturing chamber wall 11.

[0041] Furthermore, the pressure-resistant pipeline 7 is welded into the first hole on the sealing base 3 .

[0042] Embodiment 2

[0043] This embodiment provides a signal transmission device, including a signal line 13 and the signal line sealing device in the first embodiment. The signal line 13 in the fracturing chamber is sealed in the first hole and the pressure-resistant pipeline 7 through a joint.

[0044] Embodiment 3

[0045] This embodiment provides a rock testing system, including the signal transmission device in the second embodiment.

[0046] Embodiment 4

[0047] This embodiment provides a signal line sealing method based on the signal line sealing device in Embodiment 1, comprising the following steps:

[0048] Step 1: fix the pressure-resistant pipeline 7 in the first hole in advance;

[0049] Step 2: Pass one end of the signal line 13 through the pressure-resistant pipeline 7 and the first hole and connect it to the connector;

[0050] Step 3: fix the connector to the sealing base 3, and the connector can seal the signal line 13 in the first hole;

[0051] Step 4: fix the end of the sealing base 3 away from the joint in the second hole, and the end of the signal line 12 extending out of the fracturing chamber is used for connection with external equipment.

[0052] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A signal line sealing device, characterized in that: include: A sealing base, a pressure-resistant pipeline and a joint; the sealing base is provided with a first hole along the length direction, the first hole passes through the sealing base, one end of the pressure-resistant pipeline is fixedly arranged on the wall of the first hole and is coaxial with the first hole, a second hole is provided on the fracturing chamber wall that passes through the fracturing chamber wall, the sealing base is provided with one end of the pressure-resistant pipeline for being fixedly arranged in the second hole, the other end of the sealing base is fixedly provided with the joint, the joint is used to be electrically connected to one end of the signal line, and the joint can seal the signal line in the first hole, the pressure-resistant pipeline is used to be sleeved outside the signal line and the pressure-resistant pipeline is passed through the second hole, the other end of the signal line passes through the sealing base and the pressure-resistant pipeline and is connected to the outside The connector comprises a connector body, a copper column and a sealing device, a receiving portion is formed between the connector body and the sealing base, the sealing device is in the shape of a sleeve, the two ends of the copper column are respectively connected to the connector body and the signal line, the sealing device is sleeved on the copper column and completely seals the outer wall of the copper column, the sealing device is an insulator, the sealing device is fixed in the receiving portion, and the sealing device and the copper column can seal one end of the first hole; the sealing device comprises an upper insulating pressure pad, a lower insulating pressure pad and a sealing pad, the upper insulating pressure pad, the lower insulating pressure pad and the sealing pad are all in the shape of a sleeve, the lower insulating pressure pad, the sealing pad and the upper insulating pressure pad are sequentially arranged in a direction away from the wall of the fracturing chamber It is sleeved on the copper column, the sealing pad and the copper column have an interference fit, and the upper insulating pressure pad and the lower insulating pressure pad are gap-matched with the copper column; the first hole is a step hole, the first hole includes a large hole and a small hole, the large hole is arranged at one end of the sealing base where the joint is fixedly arranged, the lower insulating pressure pad, the sealing pad and the upper insulating pressure pad are arranged in the large hole, the sealing pad and the large hole have an interference fit, the lower insulating pressure and the upper insulating pressure pad are gap-matched with the large hole, and the joint can press and fix the lower insulating pressure, the sealing pad and the upper insulating pressure pad in the large hole; it also includes a pipeline sealing pad, the pipeline sealing pad is a sleeve-shaped pipeline sealing pad, and the pipeline sealing pad is sleeved in the second hole On the pressure-resistant pipeline, the second hole and the pressure-resistant pipeline are both interference fit with the pipeline sealing gasket; it also includes a pressure cap, an online pressure pad and a offline pressure pad, the online pressure pad and the offline pressure pad are both sleeve-shaped, the online pressure pad, the pipeline sealing gasket and the offline pressure pad are sequentially sleeved on the pressure-resistant pipeline in a direction away from the inner cavity of the fracturing chamber, and the online pressure pad and the offline pressure pad are gap-fitted with the pressure-resistant pipeline; a circumferential protrusion is provided in the second hole, the online pressure pad, the pipeline sealing gasket and the offline pressure pad are arranged in the part of the second hole away from the inner cavity of the fracturing chamber, and the pressure cap can press the online pressure pad, the pipeline sealing gasket and the offline pressure pad on the protrusion.

2. The signal line sealing device according to claim 1, characterized in that: The joint body is threadedly connected to the sealing base, and the joint body is tightened or loosened along the length direction of the sealing base.

3. The signal line sealing device according to claim 1, characterized in that: The pressure cap is threadedly connected to one end of the second hole away from the inner cavity of the fracturing chamber, and the pressure cap is tightened or loosened along the axial direction of the pressure-resistant pipeline.

4. A signal transmission device, characterized in that: The invention comprises a signal line and the signal line sealing device according to any one of claims 1 to 3, wherein the signal line in the fracturing chamber is sealed in the first hole and the pressure-resistant pipeline through the joint.

5. A rock testing system, characterized in that: Includes the signal transmission device as described in claim 4.

6. A signal line sealing method based on the signal line sealing device according to any one of claims 1 to 3, characterized in that: The following steps are involved: Step 1: pre-fix the pressure-resistant pipeline in the first hole; Step 2: Pass one end of the signal line through the pressure-resistant pipeline and the first hole and connect it to the connector; Step 3: fix the joint to the sealing base, and the joint can seal one end of the first hole; Step 4: Fix the end of the sealing base away from the joint into the second hole.

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