A well logging depth measuring device

Abstract

The utility model discloses a logging depth measuring equipment, including base, the base is installed by the deceleration servo motor drive's reel, the top fixed mounting of base has the support, the support top end rotatable installation has the guide pulley, the outer wall fixed mounting of support has encoder, the utility model discloses a guide pulley and encoder are set, can carry out the metering to the unwinding length of the anti -tension cable when to the anti -tension cable is reeled in and unreeled, through the setting of static pressure type liquid level probe, when static pressure type liquid level probe contacts the well bottom, continues to unreeled anti -tension cable, the liquid level depth that it detects will not change, therefore can judge static pressure type liquid level probe touch the bottom in time, to avoid the anti -tension cable in logging and occur winding after continuing to unreeled, then to the anti -tension cable is reeled in, and observes the liquid level depth that detects, can calculate the depth of logging according to the change of liquid level depth and the length that anti -tension cable unreeled, and the use effect is good.

Description

Technical Field

[0001] This utility model relates to a depth measuring device, specifically a well logging depth measuring device. Background Technology

[0002] Well logging, also known as geophysical logging, is a method of measuring geophysical parameters by utilizing the geophysical properties of rock formations, such as electrochemical, electrical, acoustic, and radioactive properties. It belongs to one of the applied geophysical methods and is often used in hydrological monitoring as well as in the exploration and mining of oil, coalfields, geothermal and metal ore bodies.

[0003] A search revealed that patent CN222716894U discloses a tension depth measuring device for oil well logging. This device, through the arrangement of a weight, drive motor, winding reel, and measuring rope, achieves the effect of measuring the depth of an oil well. Furthermore, the inclusion of support wheels, support springs, a moving frame, magnetic blocks, a magnetic control switch, and an audible and visual alarm allows for alerting nearby personnel when the weight contacts the bottom of the oil well, causing the measuring rope to slacken and change tension. This enables personnel to promptly detect and stop the unwinding of the measuring rope, effectively preventing the rope from becoming entangled inside the oil well due to continuous unwinding, thus greatly facilitating the measurement work.

[0004] Although the above solution claims to be able to alert surrounding personnel when the boulder contacts the bottom of the well and causes the measuring rope to slacken and change tension, the measuring rope is very long when the well is deep. Under its own weight, it is difficult to trigger the magnetic switch in time when the boulder touches the bottom and continues to unwind the measuring rope. This solution needs improvement. Utility Model Content

[0005] The purpose of this invention is to provide a well logging depth measurement device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A well logging depth measuring device includes a base, on which a drum driven by a geared servo motor is mounted. A bracket is fixedly mounted on the top of the base. A guide wheel is rotatably mounted inside the top of the bracket. An encoder is fixedly mounted on the outer wall of the bracket. The axle of the guide wheel is fixedly connected to the rotating shaft of the encoder. A clamping wheel is rotatably connected to one side of the guide wheel inside the bracket. A tensile cable is threaded between the guide wheel and the clamping wheel. A hydrostatic level probe is mounted at one end of the tensile cable. The tensile cable is wound on the drum. A tensioning mechanism for the clamping wheel is mounted on the bracket. A guide sleeve is fixedly mounted on the outer wall of the bracket. A guide rod is movably mounted inside the guide sleeve. A second hand-tightening bolt is installed on the outer wall of the guide sleeve through a threaded hole. A scale strip is provided on the outer wall of the guide rod. A support plate is fixedly mounted on the bottom end of the guide rod. A digital display host is mounted on the top of the base. The encoder and the hydrostatic level probe are both electrically connected to the digital display host.

[0007] As a further embodiment of this utility model: the outer walls of the bracket on both sides of the clamping wheel are slidably mounted with sliders through sliding grooves, and the axle of the clamping wheel is slidably mounted on the two sliders.

[0008] As a further embodiment of this utility model: the tensioning mechanism includes a U-shaped pressure plate that is slidably installed in two sliding grooves, and a first hand-tightening bolt is installed on the outer wall of the bracket through a threaded hole. The threaded end of the first hand-tightening bolt is rotatably connected to the U-shaped pressure plate through a bearing seat. Springs are provided between both ends of the U-shaped pressure plate and the two sliders.

[0009] As a further embodiment of this utility model: both ends of the U-shaped pressure plate and the outer wall of the slider are fixedly installed with positioning pins, and both ends of the spring are sleeved on the corresponding positioning pins.

[0010] As a further improvement of this utility model: the outer wall of the hydrostatic level probe is fitted with a protective sleeve through an external thread, the inner wall of the opening of the protective sleeve is provided with an internal thread, and the outer wall of the protective sleeve is provided with several through holes.

[0011] Compared with the prior art, the beneficial effects of this utility model are: This invention, by incorporating guide wheels and an encoder, measures the unwinding length of the tensile cable during unwinding and rewinding. The hydrostatic level probe monitors the liquid depth after entering the wellbore. Once the probe reaches the bottom, unwinding the tensile cable does not change the detected liquid level, allowing inspectors to promptly determine when the probe has reached the bottom and prevent the cable from becoming entangled within the wellbore. After unwinding, the cable is rewound, and the detected liquid level is observed. The wellbore depth can then be calculated based on the change in liquid level and the unwound length of the cable, resulting in excellent performance. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a well logging depth measurement device.

[0013] Figure 2 This is a schematic diagram of the guide seat in a well logging depth measurement device.

[0014] Figure 3 This is a schematic diagram of the structure of a protective sleeve in a well logging depth measurement device.

[0015] The components include: base 1, support plate 2, drum 3, electrical rotary joint 4, digital display host 5, tensile cable 6, hydrostatic level probe 7, bracket 8, guide wheel 9, encoder 10, clamping wheel 11, annular groove 12, slide groove 13, slider 14, U-shaped pressure plate 15, spring 16, positioning pin 17, first hand-tightening bolt 18, guide seat 19, guide hole 20, guide sleeve 21, second hand-tightening bolt 22, guide rod 23, scale bar 24, support plate 25, protective sleeve 26, and through hole 27. Detailed Implementation

[0016] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figures 1-3In this embodiment of the invention, a well logging depth measuring device includes a base 1. A drum 3 driven by a geared servo motor is mounted on the base 1. A bracket 8 is fixedly mounted on the top of the base 1. A guide wheel 9 is rotatably mounted inside the top of the bracket 8. An encoder 10 is fixedly mounted on the outer wall of the bracket 8. The axle of the guide wheel 9 is fixedly connected to the rotating shaft of the encoder 10. A clamping wheel 11 is rotatably connected to one side of the guide wheel 9 inside the bracket 8. A tensile cable 6 is threaded between the guide wheel 9 and the clamping wheel 11. A hydrostatic level probe 7 is mounted on one end of the tensile cable 6. The tensile cable 6 is wound on the drum 3, which is a hollow structure. A support plate 2 is rotatably connected to one end of the drum. Two support plates 2 are fixedly mounted on the base 1. The motor is fixed on a support plate 2, and its output shaft is fixedly connected to one end of the drum. An electrical rotary joint 4 is fixedly installed on another support plate 2. The end of the tensile cable 6 away from the hydrostatic level probe 7 passes through the drum 3 and is electrically connected to the electrical rotary joint 4. A tensioning mechanism for the clamping wheel 11 is installed on the bracket 8. A guide sleeve 21 is fixedly installed on the outer wall of the bracket 8. A guide rod 23 is movably installed inside the guide sleeve 21. A second hand-tightening bolt 22 is installed on the outer wall of the guide sleeve 21 through a threaded hole. A scale strip 24 is provided on the outer wall of the guide rod 23. A support plate 25 is fixedly installed at the bottom end of the guide rod 23. A digital display host 5 is installed on the top of the base 1. The encoder 10 and the electrical rotary joint 4 are both electrically connected to the digital display host 5 through wires.

[0018] By adopting the above-described scheme, this utility model, in use, involves placing the support plate 25 against the wellhead, then placing the bottom end of the hydrostatic level probe 7 against the support plate 25. Afterward, the support plate 25 is removed, and the reduction servo motor is activated to unwind the tension cable 6, allowing the hydrostatic level probe 7 to be placed into the well. During the unwinding process of the tension cable 6, the guide wheel 9 rotates. Since the outer diameter of the guide wheel 9 is fixed, the encoder 10 can be used to measure the unwinding length. Once the hydrostatic level probe 7 enters the well and is submerged in the liquid, it can be used to measure the... The current liquid level depth is measured. When the hydrostatic level probe 7 contacts the bottom of the well, the tensile cable 6 is unwound. The detected liquid level depth will not change. Therefore, the testing personnel can promptly determine that the hydrostatic level probe 7 has reached the bottom, so as to avoid the tensile cable 6 from getting tangled in the well after unwinding. Then, the tensile cable 6 is wound up, and the liquid level depth detected by the hydrostatic level probe 7 is observed. The well depth can be calculated based on the change in liquid level depth and the length of the unwound tensile cable 6. The method has good results.

[0019] Specific combination Figure 1 and Figure 2In one embodiment of the present invention, the bracket 8 has sliders 14 slidably installed on the outer walls of both sides of the clamping wheel 11 through the sliding groove 13, and the axle of the clamping wheel 11 is slidably installed on the two sliders 14.

[0020] The cooperation between slider 14 and groove 13 ensures the stability of the movement of clamping wheel 11 on bracket 8.

[0021] Specific combination Figure 1 and Figure 2 Based on the previous embodiment, the tensioning mechanism further includes a U-shaped pressure plate 15 that is slidably installed in two slide grooves 13. A first hand-tightening bolt 18 is installed on the outer wall of the bracket 8 through a threaded hole. The threaded end of the first hand-tightening bolt 18 is rotatably connected to the U-shaped pressure plate 15 through a bearing seat. Springs 16 are provided between both ends of the U-shaped pressure plate 15 and the two sliders 14.

[0022] By rotating the first hand-tightening bolt 18 on the bracket 8, the U-shaped pressure plate 15 can be pushed to move towards the guide wheel 9, thereby pushing the clamping wheel 11 closer to the guide wheel 9 and compressing the spring 16. The spring force of the spring 16 is used to clamp the tensile cable 6 between the clamping wheel 11 and the guide wheel 9.

[0023] Specific combination Figure 2 In one embodiment of this utility model, positioning pins 17 are fixedly installed at both ends of the U-shaped pressure plate 15 and the outer wall of the slider 14, and the two ends of the spring 16 are sleeved on the corresponding positioning pins 17 to ensure the stability of the spring 16 installed between the U-shaped pressure plate 15 and the slider 14.

[0024] Specific combination Figure 1 and Figure 3 In one embodiment of this utility model, the outer wall of the hydrostatic level probe 7 is fitted with a protective sleeve 26 through an external thread. The inner wall of the opening of the protective sleeve 26 is provided with an internal thread, and the outer wall of the protective sleeve 26 is provided with a plurality of through holes 27. The protective sleeve 26 can effectively protect the hydrostatic level probe 7 and can also serve as a counterweight.

[0025] In addition, specific combinations Figure 2 In one embodiment of this utility model, both the guide wheel 9 and the clamping wheel 11 are provided with annular grooves 12 that are adapted to the tensile cable 6. The bracket 8 is fixedly installed with a guide seat 19 having a guide hole 20, and the tensile cable 6 passes through the guide hole 20 to prevent the tensile cable 6 from sliding along the axial direction of the guide wheel 9 on the surface of the guide wheel 9 during the winding and unwinding process.

[0026] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A well logging depth measurement device, characterized in that: Includes a base (1), on which a drum (3) driven by a geared servo motor is mounted. A bracket (8) is fixedly mounted on the top of the base (1). A guide wheel (9) is rotatably mounted inside the top of the bracket (8). An encoder (10) is fixedly mounted on the outer wall of the bracket (8). The axle of the guide wheel (9) is fixedly connected to the shaft of the encoder (10). A clamping wheel (11) is rotatably connected to one side of the guide wheel (9) inside the bracket (8). A tensile cable (6) is threaded between the guide wheel (9) and the clamping wheel (11). A hydrostatic level probe (7) is installed at one end of the tensile cable (6). The cable (6) is wound on the drum (3). A tensioning mechanism for the clamping wheel (11) is installed on the bracket (8). A guide sleeve (21) is fixedly installed on the outer wall of the bracket (8). A guide rod (23) is movably installed inside the guide sleeve (21). A second hand-tightening bolt (22) is installed on the outer wall of the guide sleeve (21) through a threaded hole. A scale strip (24) is provided on the outer wall of the guide rod (23). A support plate (25) is fixedly installed at the bottom end of the guide rod (23). A digital display host (5) is installed on the top of the base (1). The encoder (10) and the hydrostatic level probe (7) are both electrically connected to the digital display host (5).

2. The well logging depth measuring device according to claim 1, characterized in that: The bracket (8) has sliders (14) slidably installed on the outer walls on both sides of the clamping wheel (11) through the sliding groove (13). The axle of the clamping wheel (11) is slidably installed on the two sliders (14).

3. The well logging depth measuring device according to claim 2, characterized in that: The tensioning mechanism includes a U-shaped pressure plate (15) that is slidably installed in two slide grooves (13). A first hand-tightening bolt (18) is installed on the outer wall of the bracket (8) through a threaded hole. The threaded end of the first hand-tightening bolt (18) is rotatably connected to the U-shaped pressure plate (15) through a bearing seat. Springs (16) are provided between both ends of the U-shaped pressure plate (15) and the two sliders (14).

4. The well logging depth measuring device according to claim 3, characterized in that: Positioning pins (17) are fixedly installed on both ends of the U-shaped pressure plate (15) and the outer wall of the slider (14), and the two ends of the spring (16) are sleeved on the corresponding positioning pins (17).

5. The well logging depth measuring device according to claim 1, characterized in that: The outer wall of the hydrostatic level probe (7) is fitted with a protective sleeve (26) through an external thread. The inner wall of the opening of the protective sleeve (26) is provided with an internal thread, and the outer wall of the protective sleeve (26) is provided with several through holes (27).

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