Logging instrument with centralizer efficient buffering function

Abstract

The utility model discloses a logging instrument with a centralizer efficient buffering function, and belongs to the technical field of logging instruments, the logging instrument comprises a main body, the centralizer is fixed at the middle end of the main body, the centralizer comprises a casing frame, the outer wall of the periphery of the casing frame is connected with a first shaft seat, one end of the first shaft seat is in shaft connection with a supporting rod, and the other end of the first shaft seat is in shaft connection with a second shaft seat. A connecting shaft seat is fixed to the middle of the bottom face of the supporting rod. In the process that the supporting rod of the logging instrument is attached to the well wall through the attaching frame, the supporting rod can be evenly attached to the well wall through the multiple sets of buffering piles distributed on one side of the attaching frame, and each set of buffering piles can elastically stretch out and draw back through the inner spring and one side of the attaching frame; meanwhile, the soft rubber wheel made of silica gel is matched with the groove line to keep stability and high temperature resistance in the sliding process with the well wall, the influence of the uneven well wall environment on supporting of the attaching frame is reduced in cooperation with elastic stretching, and therefore the instrument and the well wall are kept in the stable downward sliding imbedding process in cooperation with elastic adjustment of the supporting rod, and stability is provided for the detection process.

Description

Technical Field

[0001] This utility model relates to the field of logging instrument technology, specifically to a logging instrument with a centralizer and efficient buffering function. Background Technology

[0002] Wireless logging-while-drilling (WWD) tools are devices that measure formation parameters in real time during drilling. They use wireless transmission technology to transmit data to the surface or temporarily store it in downhole storage. Their core functions include geological parameter measurement, such as natural gamma ray and resistivity, and engineering parameter monitoring, such as well inclination angle and azimuth angle. They are widely used in oil and gas extraction and mining engineering. During use, these logging tools can achieve real-time communication between the downhole and the surface via a wireless data transmission system using mud pulses or electromagnetic waves. The centralizer, also known as a stabilizer, is a key component that ensures the downhole instrument is centered, reduces wellbore friction, and improves logging accuracy.

[0003] Logging tool centralizers typically use elastic materials, such as rubber or metal springs, or mechanical structures, such as support wings or rollers, to keep the logging tool centered in the wellbore and avoid data errors or instrument wear caused by misalignment. Common examples include lantern-type centralizers, which automatically adjust their position around the instrument by extending or retracting the probe section, reducing the risk of collision between the instrument and the wellbore wall. Roller-type centralizers, on the other hand, reduce sliding friction between the lantern-type structure and the wellbore wall through transmission, maintaining the centralizing effect.

[0004] The aforementioned roller-type centralizer, when used in logging tool testing, mainly consists of support wings and rollers. Multiple sets of support wings are symmetrically distributed, and stability is enhanced by a rotating shaft and guide wheel structure. However, the support structure relies solely on springs to maintain the spread angle of the support wings within the well wall. When a single set of rollers slides against the well wall, the complex environment and uneven surface of the well wall contribute to frequent shaking, as the single roller experiences a single point of force. This results in frequent shaking of the logging tool in the centralized state, affecting normal testing. Therefore, we propose a logging tool with a centralizer that provides efficient buffering. Utility Model Content

[0005] The summary section of this application is intended to provide a brief overview of the concepts, which will be described in detail in the detailed description section below. This summary section is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.

[0006] The purpose of this invention is to provide a logging instrument with a centralizer and efficient buffer function to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a logging instrument with a high-efficiency buffer function of a centralizer, comprising a main body, a centralizer fixed at the middle of the main body, the centralizer including a casing frame, a first bearing connected to the outer walls of the casing frame, a support rod axially connected to one end of the first bearing, a connecting bearing fixed to the middle of the bottom surface of the support rod, an elastic telescopic rod axially connected to one side of the bottom end of the connecting bearing, a second bearing connected to one end of the elastic telescopic rod, a shaft buckle fixed to one end of the support rod, torsion springs attached to both sides of the shaft buckle, a fitting frame axially connected to one side of the shaft buckle, buffer piles distributed on the inner wall of the fitting frame, a bearing frame connected to one end of the buffer pile, a soft rubber wheel attached to the outer walls of the bearing frame, grooves formed on the outer walls of the soft rubber wheel, an inner spring embedded in the other end of the buffer pile, and limit plates connected to the outer walls of both sides of the buffer pile.

[0008] Furthermore, the buffer pile forms an elastic structure with one side of the bonding frame through an inner spring, and the buffer pile rotates with the soft rubber wheel through a bearing frame.

[0009] Furthermore, the soft rubber wheel is made of silicone, and the grooves are distributed in a ring around the outer wall of the soft rubber wheel.

[0010] Furthermore, the buffer piles are equidistantly distributed along one side of the bonding frame, and the bonding frame is elastically connected to one end of the support rod via torsion springs and axle buckles.

[0011] Furthermore, the support rod forms a rotating structure with the outer wall of the sleeve frame through the first bearing, and the support rod forms an elastic structure with the elastic telescopic rod through the connecting bearing.

[0012] Furthermore, the elastic telescopic rod forms a rotating structure with the outer wall of the casing frame through the second bearing seat, and the first bearing seat and the second bearing seat are equidistantly distributed along the outer wall of the casing frame.

[0013] Furthermore, the main body includes a detection probe, and a measuring section is connected to the bottom end of the detection probe. An instrument cap is fixed to the top and bottom ends of the detection probe, and a hanging ring is fixed to the top end of the instrument cap.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] During the process of the logging tool's support rod adhering to the well wall via the bonding frame, it can be evenly attached to the well wall through multiple sets of buffer piles distributed on one side of the bonding frame. Each set of buffer piles can elastically extend and retract with one side of the bonding frame via an internal spring. At the same time, the soft rubber wheel made of silicone material, combined with the groove line, can maintain the stability and high temperature resistance during the sliding process with the well wall. The elastic extension and retraction reduce the impact of uneven well wall environment on the support of the bonding frame. Thus, the elastic adjustment of the support rod allows the instrument to maintain a stable downward sliding insertion process with the well wall, providing stability for the detection process.

[0016] During testing, the detection probe of this logging tool can be protected, buffered, and supported by the casing frame fixed on the outer wall and three sets of support rods distributed around it. The first bearing seat and bearing buckle connected to the two ends of the support rod respectively maintain the rotation of the shaft at both ends. The support rod, together with the elastic telescopic rod connected to the bearing seat at the bottom end, maintains the elastic extension and contraction process of the downward angle, thereby providing elastic expansion and adjustment for the bonding process between the bonding frame and the well wall, improving the adaptability of the instrument to well wall environments of different sizes during the testing process.

[0017] This logging instrument provides a sealed and waterproof protection for the detection probe by fixing instrument caps at both ends of the detection probe. The hanging rings connected to the top instrument caps can be used with the hoisting rope for detection, which facilitates the detection process. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of the main body of this utility model;

[0019] Figure 2 This is a three-dimensional structural diagram of the centralizer of this utility model;

[0020] Figure 3 This is a three-dimensional structural diagram of the bonding frame in the straightening device of this utility model;

[0021] Figure 4 This is a schematic diagram of the three-dimensional structure of the buffer pile in the bonding frame of this utility model.

[0022] In the diagram: 1. Main body; 101. Detection probe; 102. Measuring section; 103. Instrument cap; 104. Hanging ring; 2. Centralizer; 201. Sleeve frame; 202. First bearing seat; 203. Support rod; 204. Connecting bearing seat; 205. Elastic telescopic rod; 206. Second bearing seat; 207. Shaft buckle; 208. Torsion spring; 209. Fitting frame; 210. Buffer pile; 211. Bearing frame; 212. Soft rubber wheel; 213. Groove line; 214. Inner spring; 215. Limiting plate. Detailed Implementation

[0023] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0024] It should also be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other.

[0025] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules, or units, and are not used to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0026] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0027] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] This utility model provides, for example Figure 1-4 The logging instrument shown includes a main body 1, a centralizer 2 fixed at the middle of the main body 1, a detection probe 101, and a measuring section 102 connected to the bottom end of the detection probe 101. An instrument cap 103 is fixed to the top and bottom ends of the detection probe 101, and a hanging ring 104 is fixed to the top end of the instrument cap 103.

[0029] To ensure stable downhole detection capabilities for the entire instrument probe section, such as Figure 1 As shown, this logging instrument provides a sealed and waterproof protection for the detection probe 101 by fixing instrument caps 103 at both ends of the detection probe 101. The hanging ring 104 connected to the top instrument cap 103 can be used with the hoisting rope for detection, which provides convenience for the detection process.

[0030] like Figure 2-4 As shown, the centralizer 2 includes a sleeve frame 201. A first bearing seat 202 is connected to the outer walls of the sleeve frame 201. A support rod 203 is axially connected to one end of the first bearing seat 202. A connecting bearing seat 204 is fixed to the center of the bottom surface of the support rod 203. An elastic telescopic rod 205 is axially connected to one side of the bottom end of the connecting bearing seat 204. A second bearing seat 206 is axially connected to one end of the elastic telescopic rod 205. A shaft buckle 207 is fixed to one end of the support rod 203. Both sides are fitted with torsion springs 208, and one side of the shaft buckle 207 is connected to a fitting frame 209. The inner wall of the fitting frame 209 is distributed with buffer posts 210. One end of the buffer post 210 is connected to a bearing frame 211. The outer walls of the bearing frame 211 are fitted with soft rubber wheels 212. The outer walls of the soft rubber wheels 212 are provided with grooves 213. The other end of the buffer post 210 is embedded with an inner spring 214. The outer walls of both sides of the buffer post 210 are connected with limit plates 215.

[0031] To maintain the stability of the overall detection probe 101 during the downhole environmental detection process, such as Figure 2-4 As shown, during the detection process, the detection probe 101 of this logging tool can be protected, buffered, and supported by the casing frame 201 fixed on the outer wall and the three sets of support rods 203 distributed around it. The first bearing seat 202 and the bearing buckle 207 connected to the two ends of the support rod 203 respectively maintain the rotation of the shaft at both ends. The support rod 203, together with the elastic telescopic rod 205 connected to the bearing seat 204 at the bottom end, maintains the elastic extension and contraction process at the downward angle, thereby providing elastic expansion and adjustment for the bonding frame 209 to bond with the well wall, improving the adaptability of the instrument to well wall environments of different sizes during the detection process.

[0032] During the process of the support rod 203 adhering to the well wall via the fitting frame 209, it can be evenly attached to the well wall through multiple sets of buffer piles 210 distributed on one side of the fitting frame 209. Each set of buffer piles 210 can elastically extend and retract with one side of the fitting frame 209 via the inner spring 214. At the same time, the soft rubber wheel 212 made of silicone material, together with the groove line 213, can maintain the stability and high temperature resistance during the sliding process with the well wall. The elastic extension and retraction reduces the impact of uneven well wall environment on the support of the fitting frame 209. Thus, the elastic adjustment of the support rod 203 allows the instrument to maintain a stable downward sliding insertion process with the well wall, providing stability for the detection process.

[0033] In summary, when using this logging tool, the user first vertically inserts the detection probe 101 into the well environment. Beforehand, the support rods 203 around the instrument should be pressed down. The inserted support rods 203, along with the connecting shaft 204 at the bottom and the elastic telescopic rod 205, elastically extend and retract, allowing the support rods 203 to expand under elastic pressure. Simultaneously, the end-mounted fitting frame 209, under the pressure of the torsion spring 208, fits against the well wall. The soft rubber wheels 212, connected to the buffer piles 210 on one side of the fitting frame 209, slide against the well wall. During this process, each set of soft rubber wheels 212 can adapt to the uneven well wall through the inner spring 214 embedded in the buffer pile 210, thus ensuring stable insertion and detection of the entire instrument's detection probe 101.

[0034] The above description is merely a selection of preferred embodiments of this disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in the embodiments of this disclosure is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in the embodiments of this disclosure.

Claims

1. A logging instrument with a centralizer and high-efficiency buffer function, comprising a main body (1), characterized in that, A stabilizer (2) is fixed at the middle of the main body (1). The stabilizer (2) includes a sleeve frame (201). A first bearing seat (202) is connected to the outer walls of the sleeve frame (201). A support rod (203) is axially connected to one end of the first bearing seat (202). A connecting bearing seat (204) is fixed at the middle of the bottom surface of the support rod (203). An elastic telescopic rod (205) is axially connected to one side of the bottom end of the connecting bearing seat (204). A second bearing seat (206) is axially connected to one end of the elastic telescopic rod (205). A shaft buckle (207) is fixed to one end of the support rod (203). The shaft buckle (207) has torsion springs (208) attached to both sides. The shaft buckle (207) has a mounting frame (209) attached to one side. The inner wall of the mounting frame (209) has buffer posts (210). One end of the buffer post (210) is connected to a bearing frame (211). The outer walls of the bearing frame (211) are attached to soft rubber wheels (212). The outer walls of the soft rubber wheels (212) are grooved (213). The other end of the buffer post (210) is embedded with an inner spring (214). The outer walls of the two sides of the buffer post (210) are connected to limit plates (215).

2. A logging instrument with a centralizer and high-efficiency buffer function according to claim 1, characterized in that, The buffer post (210) forms an elastic structure with one side of the bonding frame (209) through the inner spring (214), and the buffer post (210) is rotatably engaged with the soft rubber wheel (212) through the bearing frame (211).

3. A logging tool with a centralizer and high-efficiency buffering function according to claim 1, characterized in that, The soft rubber wheel (212) is made of silicone, and the groove lines (213) are distributed in a ring around the outer wall of the soft rubber wheel (212).

4. A logging instrument with a centralizer and high-efficiency buffering function according to claim 1, characterized in that, The buffer piles (210) are equidistantly distributed along one side of the bonding frame (209), and the bonding frame (209) is elastically connected to one end of the support rod (203) through a torsion spring (208) and a buckle (207).

5. A logging instrument with a centralizer and high-efficiency buffer function according to claim 1, characterized in that, The support rod (203) forms a rotating structure with the outer wall of the sleeve frame (201) through the first bearing (202), and the support rod (203) forms an elastic structure with the elastic telescopic rod (205) through the connecting bearing (204).

6. A logging instrument with a centralizer and high-efficiency buffering function according to claim 1, characterized in that, The elastic telescopic rod (205) forms a rotating structure with the outer wall of the sleeve frame (201) through the second bearing (206), and the first bearing (202) and the second bearing (206) are equidistantly distributed along the outer wall of the sleeve frame (201).

7. A logging instrument with a centralizer and high-efficiency buffer function according to claim 1, characterized in that, The main body (1) includes a detection probe (101), and a measuring section (102) is connected to the bottom end of the detection probe (101). An instrument cap (103) is fixed to the top and bottom ends of the detection probe (101), and a hanging ring (104) is fixed to the top end of the instrument cap (103).

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