Device for detecting position of leakage point of inner hole of logging-while-drilling instrument

Abstract

The utility model belongs to the technical field of detection of logging-while-drilling instruments, and discloses an inner hole leakage point position detection device of a logging-while-drilling instrument. The device for detecting the position of the leakage point of the inner hole of the logging-while-drilling instrument comprises end sealing assemblies and a pin hole sealing piece, the end sealing assemblies are arranged at the two ends of a drill collar respectively and provided with parts matched with the inner wall of the drill collar, one end sealing assembly is connected with a pressing device, so that testing liquid is pressed into an inner flow channel hole of the drill collar, and the other end sealing assembly is connected with the pin hole sealing piece. The pin hole seal has a portion that mates with the pin hole of the drill collar. According to the utility model, when the instrument has a grouting fault, leakage points of an inner hole of the instrument can be eliminated or accurately positioned, and the instrument which operates for a long time can be detected before operation, so that the safety of the instrument entering a well is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of detection of logging while drilling instruments, and in particular relates to a device for detecting inner hole leakage points of logging while drilling instruments. Background Art

[0002] When working underground, logging while drilling instruments are subjected to complex alternating loads. After long-term operation, leakage points (i.e. cracks) may occur on the outer wall and inner hole of the instrument, i.e. cracks where mud enters the instrument, which in turn causes a short circuit in the instrument's internal circuit, resulting in operation failure. Leaks on the outer wall of the instrument can be detected and located by magnifying glass observation and flaw detection, but leaks in the inner hole of the instrument cannot be located by general means for the time being because the inner hole of the instrument is thin (48mm-58mm in diameter) and long (about 4m). Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a device for detecting the position of the inner hole leakage point of a logging while drilling instrument. When a grouting failure occurs in the instrument, the inner hole leakage point of the instrument can be eliminated or accurately located. The instrument with a long operating time can also be detected before operation to ensure the safety of the instrument entering the well.

[0004] In order to solve the above technical problems, the technical solution proposed by the utility model is:

[0005] A device for detecting the position of a leak in the inner hole of a logging while drilling instrument comprises an end sealing assembly and a pin hole sealing member, wherein the end sealing assemblies are respectively arranged at both ends of a drill collar and have a portion that cooperates with the inner wall of the drill collar, wherein one group of the end sealing assemblies is connected to a pressure device so that a test liquid is pressed into a flow channel hole in the drill collar, and the pin hole sealing member has a portion that cooperates with the pin hole of the drill collar.

[0006] According to the utility model of the detection device for the inner hole leakage point of the logging while drilling instrument, the pinhole seal is installed in the pinhole of the drill collar, and the end sealing components are respectively installed at the two ends of the drill collar, one set of the end sealing components is connected to the pressure device, and the colored liquid is pressed into the inner flow channel hole by the pressure device. During the pressure rise process, it is observed whether there is liquid seeping or spraying from the surface of the drill collar, so as to determine the location of the leakage point. Therefore, according to the detection device of the utility model, when the instrument has a grouting failure, the inner hole leakage point of the instrument can be eliminated or accurately located, and the instrument with a long operation time can also be tested before operation to ensure the safety of the instrument entering the well.

[0007] For the above technical solution, further improvements as described below can be made.

[0008] According to the device for detecting the inner hole leakage point of the logging while drilling instrument of the utility model, in a preferred embodiment, it also includes a flow channel hole sealing member, the flow channel hole sealing member includes a flow channel hole plug, and one end of the flow channel hole plug close to the end of the drill collar is fixed to the inner wall of the drill collar through a baffle.

[0009] By sealing the inner flow channel hole through the flow channel hole sealing member, it is possible to detect only the inner flow channel hole section close to the end of the drill collar as needed, thereby increasing the applicability of the entire detection device, and the flow channel hole plug of the above-mentioned structural form has a simple structure, is easy to process, manufacture and install, and has a stable and reliable structure.

[0010] Furthermore, in a preferred embodiment, one end of the flow channel hole plug close to the baffle has a smaller outer diameter, and the other end has a larger outer diameter.

[0011] The above-mentioned structural form facilitates fixing the baffle from the end of the flow channel hole plug.

[0012] Specifically, in a preferred embodiment, the end sealing assembly includes a box seal, wherein the outer periphery of the box seal has an API thread matching the box on the drill collar, an end face seal is provided at one end of the box seal that cooperates with the end of the drill collar, an axial seal is provided at the other end of the box seal, and a flow hole is opened at the center of the box seal.

[0013] The female buckle seal of the above-mentioned structural form can fully confirm the sealing performance during the detection process, thereby effectively ensuring the accuracy of the detection.

[0014] Specifically, in a preferred embodiment, a pipe joint is provided on one end of the female buckle seal that is connected to the pressing device, wherein the pipe joint is fixed by a retaining ring, the pressing device is connected to the flow hole through a pressing pipe, one end of the pressing pipe close to the flow hole is threadedly connected to the pipe joint, and a seal is provided between the outer periphery of the pipe joint and the inner wall of the female buckle seal.

[0015] The pressure device is threadedly connected to the pipe joint through the pressure pipe. It has a simple structure, is easy to install and arrange, and is convenient to operate. The pipe joint has threads that cooperate with the pressure pipe, and the threads can be replaced as needed.

[0016] Specifically, in a preferred embodiment, a box seal plug for sealing the flow hole is provided at the end of the box seal, a quadrilateral structure is provided at the bottom of the box seal plug, and a seal is provided between the box seal plug and the inner wall of the box seal.

[0017] By providing a female buckle sealing plug, it is convenient to seal the inner flow channel hole for another set of end sealing components that are not connected to the pressing device, thereby further improving the stability, reliability and accuracy of the detection process, and the quadrilateral structure can play an anti-rotation role.

[0018] Furthermore, in a preferred embodiment, the end sealing assembly also includes a male buckle seal, wherein the outer periphery of the male buckle seal has an API thread matching the male buckle on the drill collar, and the portion of the male buckle seal that cooperates with the end of the drill collar is provided with an end face seal.

[0019] For a drill collar having a male buckle at one end, the male buckle seal can be used to seal the end of the drill collar well, thereby greatly improving the applicability of the detection device.

[0020] Further, in a preferred embodiment, a male buckle seal plug which cooperates with the flow channel hole in the drill collar is provided in the male buckle seal, and a seal is provided between the male buckle seal plug and the end face of the drill collar.

[0021] By adding a male buckle sealing plug, it is convenient to seal the inner flow channel hole for another set of end sealing components that are not connected to the pressure device, thereby further improving the stability, reliability and accuracy of the detection process.

[0022] Specifically, in a preferred embodiment, the pin hole seal includes a pin plug, wherein one end of the pin plug close to the end of the drill collar is fixed to the inner wall of the drill collar through a baffle, an axial seal is arranged between the pin plug and the pin hole, and a center hole matching the pin is arranged on the pin plug.

[0023] The pin hole seal of the above structural form has a simple structure, is easy to install and arrange, is convenient to operate, has good sealing performance, and the setting of the center hole facilitates the detection of leaks without removing the pin from the drill collar. Specifically, the outer diameter of one end of the pin plug that matches the baffle is small, and the outer diameter of the other end is large, which is convenient for fixing and installing the baffle.

[0024] Further, in a preferred embodiment, a handle is provided on the end sealing assembly.

[0025] By providing a handle, the operating convenience of the entire detection device can be further improved.

[0026] Specifically, in this embodiment, the baffle cooperates with the threaded hole on the drill collar to fix the pin plug and the flow channel hole plug.

[0027] Compared with the prior art, the utility model has the following advantages: the pinhole seal is installed in the pinhole of the drill collar, and the end seal components are installed at both ends of the drill collar respectively, one set of the end seal components is connected to a pressure device, and the colored liquid is pressed into the inner flow channel hole by the pressure device, and whether there is liquid seeping or spraying from the surface of the drill collar during the pressure rise process is observed, thereby determining the location of the leak. Therefore, according to the detection device of the utility model, when a grouting failure occurs in the instrument, the leak in the inner hole of the instrument can be eliminated or accurately located, and the instrument with a long operation time can also be tested before operation to ensure the safety of the instrument entering the well. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The overall structure of the device for detecting the position of the inner hole leakage point of the logging while drilling instrument in Example 1 of the utility model is schematically shown;

[0029] Figure 2 Schematically shows Figure 1 The A-axis local magnified structure;

[0030] Figure 3 Schematically shows Figure 1 The local magnified structure in the middle B direction;

[0031] Figure 4 Schematically shows Figure 1 The local magnified structure in the middle C direction;

[0032] Figure 5 The overall structure of the device for detecting the position of the inner hole leakage point of the logging while drilling instrument in Example 2 of the utility model is schematically shown;

[0033] Figure 6 Schematically shows Figure 5 The D direction in the middle shows the local magnified structure.

[0034] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale. DETAILED DESCRIPTION

[0035] In order to better understand the purpose, structure and function of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings.

[0036] Figure 1 The overall structure of the device 10 for detecting the inner hole leakage point of the logging while drilling instrument according to the first embodiment of the utility model is schematically shown. Figure 2 Schematically shows Figure 1 A in the middle shows a local magnified structure. Figure 3 Schematically shows Figure 1 The B axis is a local magnified structure. Figure 4 Schematically shows Figure 1The local structure is magnified in the middle C direction. Figure 5 The overall structure of a device 10 ′ for detecting a leak point in a borehole of a logging while drilling instrument according to Embodiment 2 of the utility model is schematically shown. Figure 6 Schematically shows Figure 5 The D direction in the middle shows the local magnified structure.

[0037] Example 1

[0038] like Figures 1 to 3 As shown, the inner hole leakage point detection device 10 of the logging while drilling instrument of the embodiment of the utility model comprises an end sealing assembly 1 and a pin hole sealing member 2, wherein the end sealing assembly 1 is respectively arranged at both ends of the drill collar and has a portion that cooperates with the inner wall of the drill collar, wherein one group of the end sealing assemblies 1 is connected to the pressure device 3 so that the test liquid is pressed into the first inner flow channel hole section and the second flow channel hole section of the drill collar, and the pin hole sealing member 2 has a portion that cooperates with the pin hole of the drill collar.

[0039] According to the device for detecting the position of the inner hole leakage point of the logging while drilling instrument of the embodiment of the utility model, the pinhole seal is installed in the pinhole of the drill collar, and the end sealing components are respectively installed at the two ends of the drill collar, one set of the end sealing components is connected to the pressure device, and the colored liquid is pressed into the inner flow channel hole by the pressure device. During the pressure rise process, it is observed whether there is liquid seeping or spraying from the surface of the drill collar, so as to determine the location of the leakage point. Therefore, according to the detection device of the utility model, when the instrument has a grouting failure, the inner hole leakage point of the instrument can be eliminated or accurately located, and the instrument with a long operation time can also be tested before operation to ensure the safety of the instrument entering the well.

[0040] like Figure 1 and Figure 3 As shown, further, the device 10 for detecting the inner hole leakage point of the logging while drilling instrument in the embodiment of the utility model also includes a flow channel hole seal 4, and the flow channel hole seal 4 includes a flow channel hole plug 41, and one end of the flow channel hole plug 41 close to the end of the drill collar is fixed to the inner wall of the drill collar through a baffle 5. By sealing the inner flow channel hole with the flow channel hole seal, it is possible to only detect the second inner flow channel hole section close to the end of the drill collar as needed, thereby increasing the applicability of the entire detection device, and the flow channel hole plug of the above-mentioned structural form has a simple structure, is easy to process and manufacture, and is easy to install and arrange, and has a stable and reliable structure. Furthermore, in this embodiment, the outer diameter of one end of the flow channel hole plug 41 close to the baffle 5 is small, and the outer diameter of the other end is large. The above-mentioned structural form makes it easy to fix the baffle 5 from the end of the flow channel hole plug 41.

[0041] like Figure 1 and Figure 2As shown, specifically, in this embodiment, the end sealing assembly 1 includes a box seal 11, wherein the outer periphery of the box seal 11 has an API thread matching the box on the drill collar, an end face seal 12 is provided at one end of the box seal 11 that matches the end of the drill collar, an axial seal 13 is provided at the other end of the box seal 11, and a flow hole 14 is provided at the center of the box seal 11. The box seal of the above structural form can fully confirm the sealing performance during the detection process, thereby effectively ensuring the accuracy of the detection.

[0042] like Figure 1 and Figure 2 As shown, specifically, in this embodiment, a pipe joint 15 is provided at one end of the female buckle seal 11 connected to the pressure device 3, wherein the pipe joint 15 is fixed by a retaining ring 6, the pressure device 3 is connected to the flow hole 14 through the pressure pipe 31, and one end of the pressure pipe 31 close to the flow hole 14 is threadedly connected to the pipe joint 15, and a seal 16 is provided between the outer periphery of the pipe joint 15 and the inner wall of the female buckle seal 11. The pressure device 3 is threadedly connected to the pipe joint 15 through the pressure pipe 31, which has a simple structure, is easy to install and arrange, and is convenient to operate. The pipe joint has threads, which cooperate with the pressure pipe, and the threads can be replaced as needed.

[0043] like Figure 1 and Figure 4 As shown, specifically, in this embodiment, for another group of end sealing components 1 not connected to the pressing device 3, a box seal plug 17 for sealing the flow hole 14 is provided at the end of the box seal 11, and a quadrilateral structure is provided at the bottom of the box seal plug 17. A seal 16 is provided between the box seal plug 17 and the inner wall of the box seal 11. The box seal plug 17 is provided with the box seal plug 17, so that the inner flow channel hole of the other group of end sealing components 1 not connected to the pressing device 3 can be sealed, thereby further improving the stability, reliability and accuracy of the detection process, and the quadrilateral structure can play an anti-rotation role.

[0044] like Figure 1 and Figure 3As shown, specifically, in this embodiment, the pin hole seal 2 includes a pin plug 21, wherein one end of the pin plug 21 close to the end of the drill collar is fixed to the inner wall of the drill collar through a baffle 4, an axial seal 22 is provided between the pin plug 21 and the pin hole, and a center hole matching the pin is provided on the pin plug 21. The pin hole seal 2 of the above-mentioned structural form has a simple structure, is easy to install and arrange, is convenient to operate, has good sealing performance, and the setting of the center hole facilitates the detection of leaks without removing the pin from the drill collar. Specifically, one end of the pin plug 21 matching with the baffle 5 has a small outer diameter, and the other end has a large outer diameter, which is convenient for fixing and installing the baffle 5. Specifically, in this embodiment, the baffle 5 matches with the threaded hole on the drill collar, and the pin plug 21 and the flow channel hole plug 41 are fastened by screws.

[0045] like Figure 1 As shown, further, in this embodiment, a handle 7 is provided on the end sealing assembly 1. By providing the handle 7, the convenience of operation of the entire detection device can be further improved.

[0046] The working process of the detection device 10 of this embodiment is as follows:

[0047] (1) Detection of the first inner flow channel hole section and the second inner flow channel hole section:

[0048] like Figure 3 As shown, the pin plug 21 with a sealing ring is installed in the pin hole of the drill collar, and the baffle 4 fixes the pin plug 21 and fastens it with 4 screws;

[0049] Install the pipe joint 15 (with a sealing ring) and the box seal plug 17 (with a sealing ring) on ​​a box seal 11 respectively, and fix them with a retaining ring 6; the box seal 11 is also installed with a corresponding sealing ring, and the assembled box seal 11 is respectively installed on the API threads at both ends of the drill collar;

[0050] The female buckle seal 11 with the pipe joint 15 is connected to the pressure pipe 31 and the pressure device 3, and the colored liquid is pressed into the inner flow channel hole. During the pressure rise process, it is observed whether there is liquid seeping or spraying from the surface of the drill collar, and the location of the leak is determined.

[0051] (2) Detection of the second inner flow channel hole section

[0052] Install the pin plug 21 with a sealing ring and the flow channel plug 41 into the pin hole of the drill collar, fix the pin plug 21 with the baffle 4 and tighten it with 4 screws;

[0053] Install the pipe joint 15 (with a sealing ring) on ​​a box seal 11 and fix it with a retaining ring 6; the box seal 11 is also installed with a corresponding sealing ring, and the assembled box seal 11 is respectively installed on the API thread at one end of the drill collar (the inner flow channel hole section that needs to be tested);

[0054] The female buckle seal 11 with the pipe joint 15 is connected to the pressure pipe 31 and the pressure device 3, and the colored liquid is pressed into the inner flow channel hole. During the pressure rise process, it is observed whether there is liquid seeping or spraying from the surface of the drill collar, and the location of the leak is determined.

[0055] Example 2

[0056] like Figure 5 and Figure 6 As shown, the device 10' for detecting the inner hole leakage point of the logging while drilling instrument of this embodiment is different from the above-mentioned embodiment in that the end sealing assembly 1 also includes a male buckle seal 101, wherein the outer periphery of the male buckle seal 101 has an API thread matching the male buckle on the drill collar 20, and the part of the male buckle seal 101 that matches the end of the drill collar is provided with an end face seal 102. For a drill collar with a male buckle at one end, the male buckle seal can well seal the end of the drill collar, thereby greatly improving the applicability of the detection device.

[0057] like Figure 5 and Figure 6 As shown, further, in this embodiment, a male buckle seal plug 103 is provided in the male buckle seal 101 to form a match with the inner flow channel hole of the drill collar, and a seal 104 is provided between the male buckle seal plug 103 and the end face of the drill collar. By adding a male buckle seal plug, it is convenient to seal the inner flow channel hole for another group of end sealing components that are not connected to the pressure device, thereby further improving the stability, reliability and accuracy of the detection process.

[0058] The working process of the detection device 10' of this embodiment is as follows:

[0059] (1) Detection of the first inner flow channel hole section and the second inner flow channel hole section:

[0060] like Figure 5 As shown, the pin plug 21 with a sealing ring is installed in the pin hole of the drill collar, and the baffle 4 fixes the pin plug 21 and fastens it with 4 screws;

[0061] The pipe joint 15 (with sealing ring) and the box seal plug 17 (with sealing ring) are respectively installed on a box seal 11 and fixed with a retaining ring 6; the male seal 101 is installed on the API thread of the male end of the drill collar and the flow channel hole plug 41 is pressed.

[0062] The female buckle seal 11 with the pipe joint 15 is connected to the pressure pipe 31 and the pressure device 3, and the colored liquid is pressed into the inner flow channel hole. During the pressure rise process, it is observed whether there is liquid seeping or spraying from the surface of the drill collar, and the location of the leak is determined.

[0063] (2) Detection of the second inner flow channel hole section

[0064] Install the pin plug 21 with a sealing ring and the flow channel plug 41 into the pin hole of the drill collar, fix the pin plug 21 with the baffle 4 and tighten it with 4 screws;

[0065] Install the pipe joint 15 (with a sealing ring) on ​​a box seal 11 and fix it with a retaining ring 6; the box seal 11 is also installed with a corresponding sealing ring, and the assembled box seal 11 and the pin seal 101 are respectively installed on the API thread at one end of the drill collar (the inner flow channel hole section that needs to be tested);

[0066] The female buckle seal 11 with the pipe joint 15 is connected to the pressure pipe 31 and the pressure device 3, and the colored liquid is pressed into the inner flow channel hole. During the pressure rise process, it is observed whether there is liquid seeping or spraying from the surface of the drill collar, and the location of the leak is determined.

[0067] According to the above embodiments, it can be seen that the device for detecting the position of the inner hole leakage point of the logging while drilling instrument involved in the utility model installs the pinhole seal in the pinhole of the drill collar, and installs the end sealing components at both ends of the drill collar respectively, one set of the end sealing components is connected to the pressure device, and the colored liquid is pressed into the inner flow channel hole by the pressure device, and whether there is liquid seeping or spraying from the surface of the drill collar during the pressure rise process is observed, thereby determining the location of the leakage point. Therefore, according to the detection device of the utility model, when the instrument has a grouting failure, the inner hole leakage point of the instrument can be eliminated or accurately located, and the instrument with a long operation time can also be tested before operation to ensure the safety of the instrument entering the well.

[0068] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the present invention should have the common meanings understood by technicians in the field to which the present invention belongs.

[0069] In addition, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it; although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and description of the utility model. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The utility model is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A device for detecting the position of a leak in a well while drilling logging instrument, characterized in that: It includes an end sealing assembly and a pin hole sealing member; wherein, The end sealing assemblies are respectively arranged at both ends of the drill collar and have parts that cooperate with the inner wall of the drill collar; One set of the end sealing assemblies is connected to a pressure device so that the test liquid is pressed into the flow channel hole in the drill collar; The pin hole seal has a portion that cooperates with the pin hole of the drill collar.

2. The device for detecting the inner hole leakage point of the logging while drilling instrument according to claim 1, characterized in that: It also includes a flow channel hole sealing member, which includes a flow channel hole plugging head. One end of the flow channel hole plugging head close to the end of the drill collar is fixed to the inner wall of the drill collar through a baffle.

3. The device for detecting the inner hole leakage point of the logging while drilling instrument according to claim 2, characterized in that: The flow channel hole plug has one end close to the baffle with a small outer diameter and the other end with a large outer diameter.

4. The device for detecting the inner hole leakage point position of a logging while drilling instrument according to any one of claims 1 to 3, characterized in that: The end seal assembly includes a female seal; wherein, The outer periphery of the box seal has an API thread matching the box on the drill collar; An end face seal is arranged on one end of the box seal that cooperates with the end of the drill collar, and an axial seal is arranged on the other end of the box seal; A flow hole is provided at the center of the female buckle seal.

5. The device for detecting the inner hole leakage point of the logging while drilling instrument according to claim 4, characterized in that: The end of the female buckle seal connected to the pressing device is provided with a pipe joint; wherein, The pipe joint is fixed by a retaining ring; The pressure device is connected to the circulation hole through a pressure pipe, and one end of the pressure pipe close to the circulation hole is threadedly connected to the pipe joint; A seal is arranged between the outer periphery of the pipe joint and the inner wall of the female buckle seal.

6. The device for detecting the inner hole leakage point of the logging while drilling instrument according to claim 5, characterized in that: A box seal plug for sealing the flow hole is arranged at the end of the box seal, a quadrilateral structure is arranged at the bottom of the box seal plug, and a seal is arranged between the box seal plug and the inner wall of the box seal.

7. The device for detecting the inner hole leakage point of the logging while drilling instrument according to claim 5, characterized in that: The end seal assembly also includes a male seal; wherein, The outer periphery of the male thread seal has an API thread matching the male thread on the drill collar; The parts of the male buckle seal that cooperate with the end of the drill collar are all provided with end face seals.

8. The device for detecting the inner hole leakage point of the logging while drilling instrument according to claim 7, characterized in that: A male buckle seal plug which matches with the flow channel hole in the drill collar is arranged in the male buckle seal; a seal is arranged between the male buckle seal plug and the end face of the drill collar.

9. The device for detecting the inner hole leakage point position of a logging while drilling instrument according to any one of claims 1 to 3, characterized in that: The pin hole sealing member comprises a pin plug; wherein, One end of the pin plug close to the end of the drill collar is fixed to the inner wall of the drill collar through a baffle; An axial seal is provided between the pin plug and the pin hole; The pin plug is provided with a central hole matched with the pin.

10. The device for detecting the inner hole leakage point position of a logging while drilling instrument according to any one of claims 1 to 3, characterized in that: A handle is provided on the end sealing assembly.

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