Logging monitor with anti-collision structure

Abstract

The logging monitor with the anti-collision structure structurally comprises a roller supporting frame, a winding roller and a monitoring device, the top of the roller supporting frame is rotationally connected with the winding roller, the monitoring device is connected with the winding roller through a lifting rope, and a power line is arranged at the top of the monitoring device; the monitoring device comprises a shell connected with the bottom of the lifting rope, the upper end and the lower end of the shell are conical, a supporting frame is fixedly installed on the inner side of the shell, a guide pipe is arranged in the middle of the supporting frame, a central control circuit board is installed on the inner side of the supporting frame in a clamped mode, and the guide pipe is in sliding fit with the logging monitor. The logging monitor is contracted into the shell in a mechanical transmission mode and lowered into a well, and when the logging monitor reaches a monitoring position, the logging monitor extends downwards to the outside of the shell for monitoring in the mechanical transmission mode, so that the logging monitor can be prevented from being collided by the shell.

Description

Technical Field

[0001] The present invention relates to the technical field of well logging, in particular to a well logging monitor with an anti-collision structure. Background Art

[0002] Well logging detectors are key equipment used in oil, natural gas, geothermal and other drilling operations to conduct real-time or while-drilling measurements of downhole formation parameters, wellbore conditions and fluid properties. Their core function is to provide data support for oil and gas reservoir evaluation, completion design and production optimization. For well logging monitoring, the monitor needs to be lowered into the well, and then the well logging detector is used to monitor the porosity of the rock formation, the resistivity of the bottom layer, the permeability of the fluid and other logging conditions.

[0003] Based on the above findings, the inventors have found that the existing ones mainly have the following deficiencies. For example, the existing well logging monitor is equipped with electronic components. During the down-hole logging, the well logging detector is prone to collision with the well wall, causing the electronic components inside the well logging monitor to vibrate and the circuit to fall off, resulting in damage to the well logging detector. At the same time, the well logging monitor is prone to get stuck in the protruding rocks of the well wall during the lowering and lifting process, making it inconvenient to lower and lift the well logging monitor. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem that the existing well logging monitor is equipped with electronic components, and the well logging monitor is easily collided with the well wall during the down-hole logging, causing the electronic components inside the well logging monitor to vibrate and the circuit to fall off, resulting in damage to the well logging monitor. At the same time, the well logging monitor is easily stuck in the protruding rocks on the well wall during the lowering and lifting process, making it inconvenient to lower and lift the well logging monitor. Therefore, a well logging monitor with an anti-collision structure is proposed.

[0005] In view of the above problems, the present invention provides a well logging monitor with an anti-collision structure.

[0006] To achieve the above-mentioned object, the present invention is implemented through the following technical solution: a well logging monitor with an anti-collision structure, the structure of which includes a drum support frame, a winding drum, and a monitoring device, the top of the drum support frame is rotatably connected to the winding drum, the monitoring device is connected to the winding drum via a pulling rope, and a power cord is provided on the top of the monitoring device; The monitoring device includes a shell connected to the bottom of the pulling rope, the upper and lower ends of the shell are conical, a support frame is fixedly installed on the inner side of the shell, a guide tube is provided in the middle of the support frame, and a central control circuit board is fixedly installed on the inner side of the support frame, the guide tube is slidably matched with the well logging monitoring instrument, a through groove is opened at the inner bottom end of the shell, and a sealing block and a protective structure are respectively provided at the upper and lower ends of the through groove; The well logging monitor is installed in a conduit inside the shell to prevent the well logging monitor from colliding with the well wall and being damaged when lowered into the well. At the same time, the upper and lower ends of the shell are conical in shape, which makes it easy to break through the rock in the well wall and lower it downward through the conical shape of the shell, and also makes it easy to lift the shell upward.

[0007] Furthermore, the well logging monitoring instrument includes a fixed bracket fixedly installed on the inner side of the shell, the fixed bracket is threadedly matched with the threaded rod, the bottom of the threaded rod is fixedly connected to the top of the well logging monitoring instrument through a bearing, and a servo motor is fixedly installed on the top of the fixed bracket.

[0008] Furthermore, the fixing bracket includes a support ring and four support rods, the support ring is fixedly arranged on the inner side of the shell, the four support rods are fixedly installed around the inner side of the support ring, and a clamping ring is provided in the middle position of the four support rods, and the clamping ring is rotatably connected to the transmission gear; The servo motor is engaged with the transmission gear, driving the transmission gear to cooperate with the thread of the threaded rod, so that the threaded rod can move downward against the end face of the bearing, driving the well logging monitor downward through the sealing block and protective structure to monitor the situation in the well.

[0009] Furthermore, a rotation slot is provided on the side end of the transmission gear, and the rotation slot is rotatably connected to the snap ring, and a thread groove is provided in the middle position of the interior of the transmission gear, and the thread groove is threadedly engaged with the threaded rod; By providing a rotation slot on the side end of the transmission gear, the transmission gear can be clamped in the clamping ring and rotate stably.

[0010] Furthermore, the sealing block is conical in shape and made of rubber, and a cross-shaped cutout is provided on the end surface of the sealing block; The cutout of the sealing block is in a closed state, which can prevent dust from entering the interior of the housing and affecting the normal use of the well logging monitor.

[0011] Furthermore, the protective structure includes two closing covers, and the top side ends of the closing covers are provided with a rotating shaft, and the rotating shaft is rotatably connected to the bottom of the through-groove.

[0012] Furthermore, the two closing covers are in a conical shape when closed together, and magnet blocks are respectively provided at the inner bottom ends of the two closing covers; The two closing covers can be attracted and closed together by a magnet block to prevent gravel from entering the through slot during the lowering of the outer shell into the well. Beneficial effects

[0013] Compared with the prior art, the present invention has the following beneficial effects: The present invention utilizes the conical shape of the shell to have good penetrability, which makes it easy for the shell to break through the rock in the well wall and lower down, and also makes it easy to lift the shell upward to avoid the shell being stuck on the well wall, and quickly drive the logging monitor into the well for monitoring.

[0014] The present invention utilizes mechanical transmission to retract the well logging monitoring instrument into the interior of the housing and lower it into the well. When the well logging monitoring instrument reaches the monitoring position, the well logging monitoring instrument is further extended downward to the exterior of the housing for monitoring by mechanical transmission, so that the housing can prevent the well logging monitoring instrument from being hit.

[0015] The present invention utilizes two closing covers and a sealing block to protect and seal the penetration, thereby preventing sand and dust from entering the interior during the lowering of the shell and causing damage to the well logging monitor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the main structure of a well logging monitor with an anti-collision structure according to the present invention.

[0017] Figure 2 It is a schematic diagram of the front cross-sectional structure of the monitoring device of the present invention.

[0018] Figure 3 It is a front view structural diagram of the well logging monitoring instrument of the present invention.

[0019] Figure 4 This is a schematic diagram of the main structure of the fixing bracket of the present invention.

[0020] Figure 5 It is a schematic diagram of the main structure of the transmission gear of the present invention.

[0021] Figure 6 It is a schematic diagram of the main structure of the protective structure of the present invention.

[0022] Figure 7 It is a schematic diagram of the front cross-sectional structure of the protective structure of the present invention.

[0023] In the figure: roller support frame 1, winding roller 2, monitoring device 3, pulling rope 4, power cord 5, housing 31, support frame 32, conduit 38, central control circuit board 33, well logging monitoring instrument 34, through groove 35, sealing block 36, protective structure 37, fixed bracket 341, threaded rod 342, bearing 343, servo motor 344, support ring 3411, four support rods 3412, retaining ring 3413, transmission gear 3414, rotating slot 61, threaded groove 62, closing cover 371, rotating shaft 372, magnet block 373. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0025] Example 1: Please refer to Figure 1-Figure 5 , the specific embodiments of the present invention are as follows: Its structure includes a drum support frame 1, a winding drum 2, and a monitoring device 3. The top of the drum support frame 1 is rotatably connected to the winding drum 2. The monitoring device 3 is connected to the winding drum 2 through a pulling rope 4. The top of the monitoring device 3 is provided with a power cord 5. The monitoring device 3 includes a housing 31 connected to the bottom of the pulling rope 4. The upper and lower ends of the housing 31 are conical. A support frame 32 is fixedly installed on the inside of the housing 31. A guide tube 38 is provided in the middle of the support frame 32, and a central control circuit board 33 is fixedly mounted on the inner side of the support frame 32. The guide tube 38 is slidably engaged with the well logging monitoring instrument 34. A through groove 35 is formed at the bottom end of the inner part of the housing 31. A sealing block 36 and a protective structure 37 are respectively provided at the upper and lower ends of the through groove 35. The well logging monitor 34 is installed in the conduit 38 inside the shell 31 to prevent the well logging monitor 34 from colliding with the well wall and being damaged when lowered into the well. At the same time, the upper and lower ends of the shell 31 are conical in shape, which makes it easy to break through the rock in the well wall and lower it downward through the conical shape of the shell 31, and also makes it easy to lift the shell 31 upward.

[0026] The well logging monitoring instrument 34 includes a fixed bracket 341 fixedly installed on the inner side of the shell 31. The fixed bracket 341 is threadedly engaged with a threaded rod 342. The bottom of the threaded rod 342 is fixedly connected to the top of the well logging monitoring instrument 34 through a bearing 343. A servo motor 344 is fixedly installed on the top of the fixed bracket 341.

[0027] The fixed bracket 341 includes a support ring 3411 and four support rods 3412. The support ring 3411 is fixedly arranged on the inner side of the outer shell 31. The four support rods 3412 are fixedly installed around the inner side of the support ring 3411, and a retaining ring 3413 is provided in the middle position of the four support rods 3412. The retaining ring 3413 is rotatably connected to the transmission gear 3414. The servo motor 344 engages with the transmission gear 3414, driving the transmission gear 3414 to threadedly cooperate with the threaded rod 342, so that the threaded rod 342 can move downward against the end face of the bearing 343, driving the well logging monitor 34 to penetrate the sealing block 36 and the protective structure 37 downward to monitor the situation in the well.

[0028] A rotation slot 61 is provided at the side end of the transmission gear 3414, and the rotation slot 61 is rotatably connected to the retaining ring 3413. A threaded groove 62 is provided at the inner middle position of the transmission gear 3414, and the threaded groove 62 is threadedly engaged with the threaded rod 342. By providing the rotation slot 61 at the side end of the transmission gear 3414, the transmission gear 3414 can be stuck in the retaining ring 3413 and rotate stably.

[0029] Based on the above embodiment, the specific working principle is as follows: the roller support frame 1 is moved to the upper end of the wellhead, and the winding roller 2 is suspended by the pull rope 4 to lower the shell 31 into the well. The conical shape of the shell 31 facilitates breaking through the rock in the well wall and lowering it downward, and also facilitates lifting the shell 31 upward to prevent the shell 31 from getting stuck on the well wall. When the housing 31 is lowered to the monitoring position, power is supplied to the central control circuit board 33 through the power cord 5, so that the central control circuit board 33 can control the servo motor 344 to work and engage with the transmission gear 3414 to drive the rotation, and then the threaded groove 62 inside the transmission gear 3414 is engaged with the threaded rod 342 to drive the downward movement, so that the well logging monitoring instrument 34 can push open the sealing block 36 and the protective structure 37 to move to the outside of the through groove 35 under the drive of the threaded rod 342, allowing the well logging monitoring instrument 34 to detect the situation in the well.

[0030] Example 2: Please refer to Figure 6-Figure 7 , the specific embodiments of the present invention are as follows: The sealing block 36 is conical in shape and made of rubber. A cross-shaped cutout is provided on the end face of the sealing block 36. The cutout of the sealing block 36 is in a closed state, which prevents dust from entering the interior of the housing 31 and affecting the normal use of the well logging monitor 34.

[0031] The protection structure 37 includes two closing covers 371 . A rotating shaft 372 is provided at a top side end of the closing cover 371 . The rotating shaft 372 is rotatably connected to the bottom of the through slot 35 .

[0032] The two closing covers 371 are conical in shape when closed together, and magnet blocks 373 are respectively provided at the inner bottom ends of the two closing covers 371. The magnet blocks 373 can be used to attract and close the two closing covers 371 together to prevent gravel from entering the through groove 35 when the outer shell 31 is lowered into the well.

[0033] Based on the above embodiment, the specific working principle is as follows: during the descent of the shell 31, the magnet blocks 373 in the two closing covers 371 are attracted to each other and closed together, which can prevent small stones from entering the interior of the shell 31 and causing damage to the well logging monitor 34. Then, a sealing block 36 made of rubber and with a cross cut is used to seal the interior of the through groove 35 to prevent some smaller sand and stones from entering the interior of the shell 31 and adhering to the end face of the well logging monitor 34 to affect the monitoring of the situation in the well, so that the well logging monitor 34 will not be damaged by collision during lowering, lifting and monitoring.

[0034] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0035] The embodiments should therefore be considered in all respects as illustrative and non-restrictive, the scope of the invention being defined by the appended claims rather than the foregoing description, and all changes that come within the meaning and range of equivalents of the claims are intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A well logging monitor with an anti-collision structure, comprising a drum support frame (1), a winding drum (2), and a monitoring device (3), wherein the top of the drum support frame (1) is rotatably connected to the winding drum (2), the monitoring device (3) is connected to the winding drum (2) via a pulling rope (4), and a power line (5) is provided on the top of the monitoring device (3), characterized in that: The monitoring device (3) includes a shell (31) connected to the bottom of the pulling rope (4), the upper and lower ends of the shell (31) are conical, a support frame (32) is fixedly installed on the inner side of the shell (31), a guide tube (38) is provided in the middle position of the support frame (32), and a central control circuit board (33) is fixedly installed on the inner side of the support frame (32), the guide tube (38) is slidably matched with the well logging monitoring instrument (34), a through groove (35) is opened at the inner bottom end of the shell (31), and a sealing block (36) and a protective structure (37) are respectively provided at the upper and lower ends of the through groove (35).

2. The well logging monitor with an anti-collision structure according to claim 1, characterized in that: The well logging monitoring instrument (34) includes a fixed bracket (341) fixedly mounted on the inner side of the housing (31), the fixed bracket (341) is threadedly engaged with a threaded rod (342), the bottom of the threaded rod (342) is fixedly connected to the top of the well logging monitoring instrument (34) via a bearing (343), and a servo motor (344) is fixedly mounted on the top of the fixed bracket (341).

3. The well logging monitor with an anti-collision structure according to claim 3, characterized in that: The fixed bracket (341) comprises a support ring (3411) and four support rods (3412), wherein the support ring (3411) is fixedly arranged on the inner side of the housing (31), and the four support rods (3412) are fixedly installed around the inner side of the support ring (3411), and a snap ring (3413) is provided in the middle position of the four support rods (3412), and the snap ring (3413) is rotatably connected to the transmission gear (3414).

4. The well logging monitor with an anti-collision structure according to claim 4, characterized in that: A rotation slot (61) is provided at the side end of the transmission gear (3414), and the rotation slot (61) is rotatably connected to the snap ring (3413). A threaded groove (62) is provided at the middle position inside the transmission gear (3414), and the threaded groove (62) is threadedly engaged with the threaded rod (342).

5. The well logging monitor with an anti-collision structure according to claim 1, characterized in that: The sealing block (36) is conical in shape and is made of rubber. A cross-shaped cutout is provided on the end surface of the sealing block (36).

6. The well logging monitor with an anti-collision structure according to claim 1, characterized in that: The protective structure (37) comprises two closing covers (371), and a rotating shaft (372) is provided at the top side end of the closing cover (371). The rotating shaft (372) is rotatably connected to the bottom of the through slot (35).

7. The well logging monitor with an anti-collision structure according to claim 6, characterized in that: The two closing covers (371) are conical in shape when closed together, and magnet blocks (373) are respectively provided at the inner bottom ends of the two closing covers (371).

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