Underground multi-parameter optical fiber logging instrument

Abstract

The utility model relates to an underground multi-parameter optical fiber logging instrument which comprises a power supply device, an optical fiber logging instrument body is arranged on the upper surface of the power supply device, a connecting mechanism used for fixing a structure is arranged on the outer side of the optical fiber logging instrument body, and a limiting mechanism used for preventing direct impact is arranged on the outer side of the optical fiber logging instrument body. The limiting mechanism comprises two connecting rings connected to the outer side of the optical fiber logging instrument body in a sliding mode. According to the underground multi-parameter optical fiber logging instrument, an optical fiber photometer is limited through cooperation of a limiting plate, a fixed seat, a connecting plate, a movable plate, an extension plate, a connecting ring and a reset spring under the action of a limiting mechanism, so that the optical fiber photometer cannot collide with the well wall in the process of moving downwards in a well, and the situation that the optical fiber photometer is damaged due to collision when moving downwards in the well is avoided; and meanwhile, through cooperation of a rotating rod and a rubber barrel, the ray logging instrument matched with the limiting mechanism smoothly moves downwards.

Description

Technical Field

[0001] The utility model relates to the technical field of optical fiber logging instrument bodies, in particular to a downhole multi-parameter optical fiber logging instrument. Background Art

[0002] In the development of heavy oil fields, the method of injecting high-dryness steam is generally used to improve the recovery rate. Accurately recording the temperature, pressure, flow rate and dryness of steam in the wellbore is of great significance for understanding the heat loss of steam injection and evaluating the development effect. Since the measurement environment in the steam injection well is at high temperature and high pressure, the test space is small and the measurement is difficult, a downhole multi-parameter fiber optic logging instrument is designed.

[0003] For example, Chinese patent CN218716723U discloses a utility model belonging to the technical field of fiber optic logging instruments, specifically a downhole multi-parameter fiber optic logging instrument, comprising a shell, a vacuum insulation layer is arranged in the shell, a through hole groove is arranged at the bottom of the shell, a fiber optic detection module is arranged at the top of the through hole groove, a fiber optic transmitter is arranged above the fiber optic detection module, a photoelectric converter is arranged above the fiber optic transmitter, a single-chip microcomputer is arranged above the photoelectric converter, and a wireless transmission module is arranged above the single-chip microcomputer. Through the single-chip microcomputer and the wireless transmission module, the measurement data can be remotely transmitted to the ground platform, which can greatly improve the detection efficiency compared with the existing technology.

[0004] The above patent still has certain defects. This patent can remotely transmit measurement data to the ground platform, which can greatly improve the detection efficiency compared with the existing technology. When the fiber optic logging instrument is placed in the well, it will collide with the well wall and rub against the well wall to cause wear. If the number of collisions is too many or the collision is too severe, the electronic components inside the fiber optic logging instrument will be damaged and cannot be accurately detected, resulting in a decrease in data accuracy. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a downhole multi-parameter fiber optic logging instrument, which has the advantages of preventing the fiber optic logging instrument from colliding with the well wall, and solves the problem that the fiber optic logging instrument collides with the well wall and rubs against the well wall when placed in the well, causing wear.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a downhole multi-parameter optical fiber logging instrument, comprising a power supply device, an optical fiber logging instrument body is arranged on the upper surface of the power supply device, a connecting mechanism for fixing the structure is arranged on the outer side of the optical fiber logging instrument body, and a limiting mechanism for preventing direct impact is arranged on the outer side of the optical fiber logging instrument body;

[0007] The limiting mechanism includes two connecting rings slidably connected to the outside of the fiber optic logging instrument body, the two connecting rings are fixed with fixed seats on the front, back and left and right sides, the four fixing seats are fixed with at least two reset springs on the inner cavity wall close to the connecting ring, the four groups of reset springs are fixed with limiting plates on the side away from the connecting ring, the four limiting plates are fixed with extension plates on the side away from the reset spring, the upper and lower adjacent sides of the extension plates are fixed with movable plates on the side away from the connecting ring, two connecting plates are fixed on the side of the movable plate away from the extension plate, and at least two rotating rods are rotatably connected between the opposite sides of the two adjacent connecting plates, and a rubber tube is fixed on the outside of the rotating rod.

[0008] Furthermore, a mounting groove is provided on one side opposite to each other of two adjacent connecting plates, a bearing is fixed inside the mounting groove, and the rotating rod is fixed inside the bearing.

[0009] Furthermore, the diameter of the rubber tube is greater than the length of the connecting plate, and a limiting groove for the limiting plate to be slidably connected is provided inside the fixing seat.

[0010] Furthermore, an extension hole for the extension plate to pass through is formed on a side of the fixing seat away from the connecting ring, and the extension plate is slidably connected to the inside of the fixing seat through the extension hole.

[0011] Furthermore, the connecting mechanism includes four fixed blocks slidably connected to the outside of the fiber optic logging instrument body and the four fixed blocks are respectively fixed to the lower surfaces of the two connecting rings, the internal threads of the fiber optic logging instrument body and the fixed blocks are connected with fixing screws, four positioning blocks are plugged into the inside of the fiber optic logging instrument body, and a protective box located outside the fixing screws and the fixed blocks is fixed on one side of the four positioning blocks away from the fiber optic logging instrument body, and no less than two limit springs are fixed to the inside of the fiber optic logging instrument body, and the upper surfaces of the four groups of limit springs are fixed with limit blocks plugged into the positioning blocks.

[0012] Furthermore, a threaded groove for threaded connection of a fixing screw is provided on the outer side of the fiber optic logging instrument body, a threaded hole for the fixing block to pass through is provided on the side of the fixing block away from the fiber optic logging instrument body, and the fixing screw is threadedly connected to the fixing block through the threaded hole.

[0013] Furthermore, a sealing gasket is fixed to the upper surface of the protection box and one side close to the optical fiber logging instrument body, and a positioning groove for inserting a positioning block is provided on the outer side of the optical fiber logging instrument body.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0015] 1. The downhole multi-parameter optical fiber logging instrument, the limit mechanism limits the optical fiber photometer through the cooperation of the limit plate, the fixed seat, the connecting plate, the movable plate, the extension plate, the connecting ring and the reset spring, so that the optical fiber photometer will not hit the well wall during the downward movement in the well, thereby avoiding the optical fiber photometer from being damaged due to the impact when moving down in the well. At the same time, the cooperation of the rotating rod and the rubber tube makes the optical fiber logging instrument that cooperates with the limit mechanism move downward smoothly.

[0016] 2. The downhole multi-parameter fiber optic logging instrument has a connecting mechanism that fixes the connecting ring to the outside of the fiber optic logging instrument body through the cooperation of fixing screws and fixing blocks, so that the limiting mechanism cannot move up and down and separate from the fiber optic logging instrument body. At the same time, it is also convenient for maintenance personnel to disassemble the limiting mechanism to perform maintenance work on the fiber optic logging instrument body or the limiting mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the limiting mechanism of the utility model;

[0019] Figure 3 It is a schematic diagram of the connection mechanism of the utility model.

[0020] In the figure: 1 limiting mechanism, 101 rotating rod, 102 limiting plate, 103 fixing seat, 104 connecting plate, 105 movable plate, 106 extending plate, 107 connecting ring, 108 rubber tube, 109 reset spring, 2 connecting mechanism, 201 fixing screw, 202 positioning block, 203 limiting block, 204 limiting spring, 205 protection box, 206 fixing block, 3 power supply device, 4 optical fiber logging instrument body. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1 In this embodiment, a downhole multi-parameter fiber optic logging instrument comprises a power supply device 3, a fiber optic logging instrument body 4 is arranged on the upper surface of the power supply device 3, a connecting mechanism 2 for fixing the structure is arranged on the outer side of the fiber optic logging instrument body 4, and a limiting mechanism 1 for preventing direct impact is arranged on the outer side of the fiber optic logging instrument body 4.

[0023] See also Figure 2In order to prevent the optical fiber logging instrument body 4 from colliding with the well wall, the limiting mechanism 1 in this embodiment includes two connecting rings 107 slidably connected to the outside of the optical fiber logging instrument body 4. The connecting rings 107 are in the shape of a cylinder with a hollow interior and a missing upper surface and a missing lower surface. The front, back, left and right sides of the two connecting rings 107 are fixed with fixing seats 103. The inner cavity wall of the four fixing seats 103 close to the connecting rings 107 is fixed with at least two reset springs 109. The four sets of reset springs 109 are fixed to the side away from the connecting rings 107. The four limit plates 102 are away from the reset springs 109. An extension plate 106 is fixed to one side of the spring 109, and a movable plate 105 is fixed to the side of the upper and lower adjacent extension plates 106 away from the connecting ring 107, and two connecting plates 104 are fixed to the side of the movable plate 105 away from the extension plate 106, and at least two rotating rods 101 are rotatably connected between the opposite sides of the two adjacent connecting plates 104, and a rubber tube 108 is fixed to the outside of the rotating rod 101. The rubber tube 108 is cylindrical in shape, and the rubber tube 108 allows the limiting mechanism 1 to fit against the well wall, and at the same time, cooperates with the upper rotating rod 101 so that the limiting mechanism 1 can move up and down smoothly in the well.

[0024] The opposite sides of two adjacent connecting plates 104 are each provided with an installation groove, a bearing is fixed inside the installation groove, the rotating rod 101 is fixed inside the bearing, the diameter of the rubber tube 108 is greater than the length of the connecting plate 104, and a limiting groove for the sliding connection of the limiting plate 102 is provided inside the fixing seat 103, and an extension hole for the extension plate 106 to pass through is provided on the side of the fixing seat 103 away from the connecting ring 107, and the extension plate 106 is slidably connected to the inside of the fixing seat 103 through the extension hole. The length of the limiting mechanism 1 is changed through the cooperation of the fixing seat 103, the limiting plate 102, the extension plate 106 and the reset spring 109, so that it can be applied to wells with different supports, thereby improving the scope of application and practicality.

[0025] It can be seen that the limiting mechanism 1 limits the fiber optic photometer 4 through the cooperation of the limiting plate 102, the fixing seat 103, the connecting plate 104, the movable plate 105, the extension plate 106, the connecting ring 107 and the reset spring 109, so that the fiber optic photometer 4 will not hit the well wall during the downward movement in the well, thereby avoiding damage to the fiber optic photometer 4 due to impact when moving downward in the well.

[0026] See also Figure 3In order to facilitate the disassembly and assembly of the limiting mechanism 1, the connecting mechanism 2 in this embodiment includes four fixing blocks 206 slidably connected to the outside of the optical fiber logging instrument body 4, and the four fixing blocks 206 are respectively fixed to the lower surfaces of the two connecting rings 107. The internal threads of the optical fiber logging instrument body 4 and the fixing blocks 206 are connected with fixing screws 201. The inside of the optical fiber logging instrument body 4 is plugged with four positioning blocks 202. The side of the four positioning blocks 202 away from the optical fiber logging instrument body 4 is fixed with a protective box 205 located outside the fixing screws 201 and the fixing blocks 206. The internal fixing screws 201 of the optical fiber logging instrument body 4 are fixed to the fixing screws 201 and the fixing blocks 206. There are no less than two limit springs 204, and the upper surfaces of the four groups of limit springs 204 are fixed with limit blocks 203 inserted into the positioning block 202. The lower surface of the positioning block 202 is provided with a fixed groove for limit insertion. The shape of the upper surface of the limit block 203 is semicircular. When the positioning block 202 moves, it is pushed downward along the semicircular surface of the limit block 203, and the limit block 203 compresses the limit spring 204. When the positioning block 202 completely enters the interior of the optical fiber logging instrument body 4, the limit block 203 and the limit spring 204 are pushed into the fixed groove to limit the movement of the positioning block 202.

[0027] A threaded groove for threaded connection of a fixing screw 201 is provided on the outer side of the fiber optic logging instrument body 4, a threaded hole for the fixing block 206 to pass through is provided on the side of the fixing block 206 away from the fiber optic logging instrument body 4, and the fixing screw 201 is threadedly connected to the fixing block 206 through the threaded hole, and sealing gaskets are fixed on the upper surface of the protection box 205 and the side close to the fiber optic logging instrument body 4, and the sealing gaskets are used to prevent liquid from penetrating into the protection box 205 and corroding the fixing screw 201, and a positioning groove for the positioning block 202 to be inserted is provided on the outer side of the fiber optic logging instrument body 4.

[0028] Therefore, the connecting mechanism 2 fixes the connecting ring 107 to the outside of the fiber optic logging instrument body 4 through the cooperation of the fixing screw 201 and the fixing block 206, so that the limiting mechanism 1 cannot move up and down and separate from the fiber optic logging instrument body 4. At the same time, it is also convenient for maintenance personnel to disassemble the limiting mechanism 1 to perform maintenance work on the fiber optic logging instrument body 4 or the limiting mechanism 1.

[0029] The working principle of the above embodiment is:

[0030] (1) When testing is required, the four sets of rubber tubes 108 on the outside of the fiber optic logging instrument body 4 are pressed toward the fiber optic logging instrument body 4, so that the extension plate 106 compresses the return spring 109 through the limit plate 102, and the extension plate 106 shrinks into the interior of the fixed seat 103. Then, the fiber optic logging instrument body 4 is placed into the wellhead, and then the four sets of rubber tubes 108 are released. The return spring 109 pushes the limit plate 102 outward through the rebound force, and then pushes the extension plate 106 through the limit plate 102. The movable plate 106 is The extension plate 106 moves together with the rubber tube 108, thereby driving the rubber tube 108 to move together through the connection plate 104, until the four groups of rubber tubes 108 are in contact with the well wall. The limiting mechanism 1 limits the optical fiber photometer 4 through the cooperation of the limiting plate 102, the fixing seat 103, the connection plate 104, the movable plate 105, the extension plate 106, the connection ring 107 and the return spring 109, so that the optical fiber photometer 4 will not hit the well wall during the downward movement in the well, thereby preventing the optical fiber photometer 4 from being damaged due to the impact when it moves downward in the well.

[0031] (2) When the damaged limiting mechanism 1 needs to be replaced, the protection box 205 is pulled away from the fiber optic logging instrument body 4, so that the protection box 205 drives the positioning block 202 to gradually separate from the fiber optic logging instrument body. When the positioning block 202 is completely separated from the fiber optic logging instrument body 4, the fixing screw 201 is exposed. At this time, the screw is screwed out of the fixing block 206, and the connecting ring 107 can be moved upward or downward, and then the limiting mechanism 1 is removed for replacement. The connecting mechanism 2 fixes the connecting ring 107 to the outside of the fiber optic logging instrument body 4 through the cooperation of the fixing screw 201 and the fixing block 206, so that the limiting mechanism 1 cannot move up and down and separate from the fiber optic logging instrument body 4. At the same time, it is also convenient for maintenance personnel to disassemble the limiting mechanism 1 to perform maintenance work on the fiber optic logging instrument body 4 or the limiting mechanism 1.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A downhole multi-parameter optical fiber logging tool, comprising a power supply device (3), characterized in that: The upper surface of the power supply device (3) is provided with an optical fiber logging instrument body (4), the outer side of the optical fiber logging instrument body (4) is provided with a connecting mechanism (2) for fixing the structure, and the outer side of the optical fiber logging instrument body (4) is provided with a limiting mechanism (1) for preventing direct impact; The limiting mechanism (1) comprises two connecting rings (107) slidably connected to the outside of the optical fiber logging instrument body (4); the front, back and left and right sides of the two connecting rings (107) are fixed with fixing seats (103); the inner cavity wall of the four fixing seats (103) close to the connecting rings (107) is fixed with at least two return springs (109); the side of the four groups of return springs (109) away from the connecting rings (107) is fixed with a limiting plate (102); the four limiting plates (102) are fixed with the inner cavity wall of the four fixing seats (103) close to the connecting rings (107); 02) An extension plate (106) is fixed on the side away from the reset spring (109), and a movable plate (105) is fixed on the side of the upper and lower adjacent extension plates (106) away from the connecting ring (107), and two connecting plates (104) are fixed on the side of the movable plate (105) away from the extension plate (106), and at least two rotating rods (101) are rotatably connected between the opposite sides of the two adjacent connecting plates (104), and a rubber tube (108) is fixed on the outer side of the rotating rod (101).

2. A downhole multi-parameter optical fiber logging tool according to claim 1, characterized in that: An installation groove is provided on one side opposite to the two adjacent connecting plates (104), a bearing is fixed inside the installation groove, and the rotating rod (101) is fixed inside the bearing.

3. A downhole multi-parameter optical fiber logging tool according to claim 1, characterized in that: The diameter of the rubber tube (108) is greater than the length of the connecting plate (104), and a limiting groove for sliding connection of the limiting plate (102) is provided inside the fixing seat (103).

4. A downhole multi-parameter optical fiber logging tool according to claim 1, characterized in that: An extension hole for the extension plate (106) to pass through is provided on a side of the fixing seat (103) away from the connecting ring (107), and the extension plate (106) is slidably connected to the inside of the fixing seat (103) through the extension hole.

5. A downhole multi-parameter optical fiber logging tool according to claim 1, characterized in that: The connection mechanism (2) comprises four fixing blocks (206) slidably connected to the outside of the optical fiber logging instrument body (4), and the four fixing blocks (206) are respectively fixed to the lower surfaces of the two connecting rings (107); the internal threads of the optical fiber logging instrument body (4) and the fixing blocks (206) are connected with fixing screws (201); the inside of the optical fiber logging instrument body (4) is plugged with four positioning blocks (202); the sides of the four positioning blocks (202) away from the optical fiber logging instrument body (4) are all fixed with a protection box (205) located outside the fixing screws (201) and the fixing blocks (206); the inside of the optical fiber logging instrument body (4) is fixed with no less than two limit springs (204); the upper surfaces of the four groups of limit springs (204) are all fixed with limit blocks (203) plugged into the inside of the positioning blocks (202).

6. A downhole multi-parameter optical fiber logging tool according to claim 5, characterized in that: The outer side of the optical fiber logging instrument body (4) is provided with a threaded groove for threaded connection of a fixing screw (201), and the side of the fixing block (206) away from the optical fiber logging instrument body (4) is provided with a threaded hole for the fixing block (206) to pass through, and the fixing screw (201) is threadedly connected to the fixing block (206) through the threaded hole.

7. A downhole multi-parameter optical fiber logging tool according to claim 5, characterized in that: Sealing pads are fixed to the upper surface of the protection box (205) and to the side close to the optical fiber logging instrument body (4), and a positioning groove for inserting a positioning block (202) is provided on the outer side of the optical fiber logging instrument body (4).

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