Replaceable optical fiber sensing probe applied to oil well

Abstract

The utility model discloses a replaceable optical fiber sensing probe for oil well, including optical fiber probe and thread cover, the optical fiber probe includes probe main part, base and plug, the thread cover top fixedly connected with the clamping seat, the base outer wall and the clamping seat inner wall are engaged, the clamping seat outside is provided with the fixed component for the base and the clamping seat fixed. In this application, after the thread cover is screwed with the external connecting piece, the probe main part passes through the thread cover, and the base is engaged with the clamping seat, then the locking rod is rotated to be screwed with the inner wall of the clamping seat, until the open end of the locking rod abuts to the outer wall of the base, so that the fixation of the base is realized by friction, and the installation of the whole optical fiber sensing probe is realized, and the subsequent only needs to be screwed with the locking rod, and the independent disassembly of the optical fiber probe can be directly realized, and the connection state of the optical fiber and the plug can be reserved, so as to facilitate the maintenance of the operator.

Description

Technical Field

[0001] This utility model relates to the field of fiber optic sensing probe technology, and in particular to a replaceable fiber optic sensing probe for use in oil wells. Background Technology

[0002] The replaceable fiber optic sensing probe for use in oil wells is a fiber optic detection device that is adapted to harsh working conditions such as high temperature, high pressure, and corrosion in oil wells. The core sensing element and the mounting base can be separated, and the sensing module can be replaced individually after damage.

[0003] Chinese Patent Publication No. CN209310942U, published on August 27, 2019, discloses a fiber optic sensing probe based on Curie temperature jump, comprising a housing, an incident collimator, a receiving collimator, an optical rotation component, and a soft magnetic material. The incident collimator and the receiving collimator are respectively inserted into opposite sides of the housing; the optical rotation component includes a permanent magnet ring and a magnetic optical rotation plate, the magnetic optical rotation plate being installed in the inner hole of the permanent magnet ring and located in the optical path between the incident collimator and the receiving collimator; the soft magnetic material is installed on the outer wall of the permanent magnet ring, and the soft magnetic material is located directly opposite the magnetic optical rotation plate.

[0004] Existing replaceable fiber optic sensor probes used in oil wells are mostly connected to external support frames via threaded connections. Considering that the rotation of the sensor probe will cause the cable to become tangled, the probe can only be disassembled and reassembled after the external plug is disconnected. The entire disassembly and assembly operation is quite limited. Therefore, there is an urgent need to propose a corresponding replaceable fiber optic sensor probe for oil wells to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a replaceable fiber optic sensing probe for use in oil wells in order to solve the above-mentioned problems.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A replaceable fiber optic sensing probe for use in oil wells includes a fiber optic probe and a threaded sleeve. The fiber optic probe includes a probe body, a base, and a plug. A retainer is fixedly connected to the top of the threaded sleeve. The outer wall of the base engages with the inner wall of the retainer. A fixing component for fixing the base and the retainer is provided on the outer side of the retainer.

[0008] Preferably, an extension seat is fixedly connected to the outer wall of the card holder, and a positioning block and a mounting part for installing the positioning block are integrated on the top of the extension seat.

[0009] Preferably, the mounting part includes a fixing frame fixedly connected to the top of the positioning block, and mounting pieces fixedly connected to both horizontal sides of the fixing frame. The two sets of mounting pieces are respectively fixedly connected to the outer wall of the extension seat through two sets of fixing rods.

[0010] Preferably, one of the two sets of mounting pieces is fixedly connected to the outer wall of the extension seat with a connecting strip.

[0011] Preferably, the fixing component includes a locking rod that is screwed into the inner wall of the card holder, and the open end of the locking rod abuts against the outer wall of the base.

[0012] Preferably, the inner surface of the horizontal end of the card holder is provided with a step, and a sealing gasket is fixedly connected to the top of the step.

[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0014] 1. In this application, after screwing the threaded sleeve with the external connector, the probe body is passed through the threaded sleeve, and the base is engaged with the card slot. Then, the locking rod is rotated to engage with the inner surface of the card slot until the open end of the locking rod abuts against the outer surface of the base. The base is fixed by friction, thereby realizing the overall installation of the fiber optic sensing probe. Subsequently, only the locking rod needs to be screwed on to directly realize the independent assembly and disassembly of the fiber optic probe, and the connection state of the fiber optic cable and the plug can be preserved for the operator's maintenance.

[0015] 2. In this application, after the fiber optic probe is fixed, the connector of the external fiber optic cable overlaps the inner surface of the bottom of the epitaxial base. After the mounting plate and the fixing rod are used to fix the fixing frame and the epitaxial base, the positioning block is pressed on the outside of the connector to reinforce the position of the connector and avoid the traction force caused by the external fiber optic cable being pulled or shaken from affecting the stability of the connection between the plug and the connector. This further improves the stability of the replaceable fiber optic sensing probe used in oil wells. Attached Figure Description

[0016] Figure 1 A schematic diagram of the overall structure according to an embodiment of the present utility model is shown;

[0017] Figure 2 A schematic diagram of a locking rod structure according to an embodiment of the present invention is shown;

[0018] Figure 3 A schematic diagram of the positioning block structure provided according to an embodiment of the present utility model is shown;

[0019] Figure 4 A schematic diagram of the fiber optic probe structure provided according to an embodiment of the present invention is shown.

[0020] Legend:

[0021] 1. Fiber optic probe; 101. Probe body; 102. Base; 103. Plug; 2. Card holder; 3. Threaded sleeve; 4. Extension seat; 5. Fixing bracket; 6. Connecting strap; 7. Locking rod; 8. Sealing gasket; 9. Positioning block; 10. Mounting plate; 11. Fixing rod; 12. Step. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-4 This utility model provides a technical solution:

[0024] A replaceable fiber optic sensing probe for use in oil wells includes a fiber optic probe 1 and a threaded sleeve 3. The fiber optic probe 1 includes a probe body 101, a base 102 and a plug 103. A retainer 2 is fixedly connected to the top of the threaded sleeve 3. The outer wall of the base 102 engages with the inner wall of the retainer 2. A fixing component for fixing the base 102 and the retainer 2 is provided on the outside of the retainer 2.

[0025] After screwing the threaded sleeve 3 onto the external connector, pass the probe body 101 through the threaded sleeve 3 and engage the base 102 with the card holder 2. Then, rotate the locking rod 7 to engage with the inner wall of the card holder 2 until the open end of the locking rod 7 abuts against the outer wall of the base 102. This fixes the base 102 through friction, thereby achieving the overall installation of the fiber optic sensing probe. Subsequently, only the locking rod 7 needs to be screwed on to allow for independent assembly and disassembly of the fiber optic probe 1, while maintaining the connection between the fiber optic cable and the plug 103 for easy maintenance by operators.

[0026] Specifically, such as Figure 2 and Figure 4As shown, an extension base 4 is fixedly connected to the outer wall of the card holder 2. The top of the extension base 4 integrates a positioning block 9 and an installation part for installing the positioning block 9. The installation part includes a fixing frame 5 fixedly connected to the top of the positioning block 9. Mounting pieces 10 are fixedly connected to both horizontal sides of the fixing frame 5. The two sets of mounting pieces 10 are fixedly connected to the outer wall of the extension base 4 through two sets of fixing rods 11. After the fiber optic probe 1 is fixed, the connector of the external fiber optic cable overlaps the inner wall of the bottom of the extension base 4. After the fixing frame 5 and the extension base 4 are fixed by the cooperation of the mounting pieces 10 and the fixing rods 11, the positioning block 9 is pressed against the outside of the connector to reinforce the position of the connector and avoid the traction force generated by the external fiber optic cable due to pulling or shaking from affecting the stability of the connection between the plug 103 and the connector. This further improves the stability of the replaceable fiber optic sensing probe used in oil wells. One of the two sets of mounting pieces 10 is fixedly connected to the outer wall of the extension base 4 with a connecting strap 6 to maintain the position of the fixing frame 5 when not in use.

[0027] Specifically, such as Figure 2 and Figure 3 As shown, the fixing component includes a locking rod 7 that is screwed onto the inner surface of the card holder 2. The open end of the locking rod 7 abuts against the outer surface of the base 102. The locking rod 7 is rotated to screw onto the inner surface of the card holder 2 until the open end of the locking rod 7 abuts against the outer surface of the base 102. The base 102 is fixed by friction. A step 12 is provided on the inner surface of the horizontal end of the card holder 2, and a sealing gasket 8 is fixedly connected to the top of the step 12 to ensure the airtightness of the connection between the card holder 2 and the base 102.

[0028] Working principle: After screwing the threaded sleeve 3 onto the external connector, the probe body 101 is passed through the threaded sleeve 3, causing the base 102 to engage with the retainer 2. Then, the locking rod 7 is rotated to engage with the inner wall of the retainer 2 until the open end of the locking rod 7 abuts against the outer wall of the base 102. This fixes the base 102 through friction, thus achieving the overall installation of the fiber optic sensing probe. Subsequently, only the locking rod 7 needs to be screwed on to allow for independent assembly and disassembly of the fiber optic probe 1, while preserving the connection between the fiber optic cable and the plug 103. In order to facilitate the maintenance of the operator, after the fiber optic probe 1 is fixed, the connector of the external fiber optic cable is attached to the inner surface of the bottom of the epitaxial base 4. After the fixing bracket 5 and the epitaxial base 4 are fixed by the cooperation of the mounting plate 10 and the fixing rod 11, the positioning block 9 is pressed on the outside of the connector to strengthen the position of the connector and prevent the traction force generated by the external fiber optic cable due to pulling or shaking from affecting the stability of the connection between the plug 103 and the connector. This further improves the stability of the replaceable fiber optic sensing probe used in oil wells.

[0029] The above description of the embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A replaceable fiber optic sensing probe for use in oil wells, comprising a fiber optic probe (1) and a threaded sleeve (3), wherein the fiber optic probe (1) comprises a probe body (101), a base (102), and a plug (103), characterized in that, The top of the threaded sleeve (3) is fixedly connected to the card holder (2), the outer wall of the base (102) engages with the inner wall of the card holder (2), and a fixing component for fixing the base (102) and the card holder (2) is provided on the outside of the card holder (2).

2. The replaceable fiber optic sensing probe for oil wells according to claim 1, characterized in that, The outer wall of the card holder (2) is fixedly connected to an extension seat (4), and the top of the extension seat (4) is integrated with a positioning block (9) and an installation part for installing the positioning block (9).

3. The replaceable fiber optic sensing probe for oil wells according to claim 2, characterized in that, The mounting part includes a fixing frame (5) fixedly connected to the top of the positioning block (9), and mounting pieces (10) fixedly connected to both horizontal sides of the fixing frame (5). The two sets of mounting pieces (10) are respectively fixedly connected to the outer wall of the extension seat (4) through two sets of fixing rods (11).

4. A replaceable fiber optic sensing probe for oil wells according to claim 3, characterized in that, One of the two sets of mounting pieces (10) is fixedly connected to the outer wall of the extension seat (4) by a connecting strip (6).

5. A replaceable fiber optic sensing probe for oil wells according to claim 1, characterized in that, The fixing component includes a locking rod (7) that is screwed into the inner wall of the card holder (2), and the open end of the locking rod (7) abuts against the outer wall of the base (102).

6. A replaceable fiber optic sensing probe for oil wells according to claim 1, characterized in that, The card holder (2) has a step (12) on the inner surface of the horizontal end, and a sealing gasket (8) is fixedly connected to the top of the step (12).

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