Hole diameter logging instrument

Abstract

The utility model relates to the technical field of underground measuring instruments, in particular to a hole diameter logging instrument which comprises a cylindrical hollow shell, a connecting cylinder with the bottom end fixed to the shell, a plurality of measuring blocks arranged outside the shell and a measuring driving assembly used for driving the measuring blocks to be close to or away from one another. The measuring block is provided with a range finder body, and the measurement driving assembly is installed in the housing. When the well bottom diameter needs to be detected, the range finder body is connected with external terminal equipment through an electric wire or in a wireless mode, the shell is placed into the well bottom till the bottom end of the shell abuts against the well bottom, the measurement driving assembly drives the multiple measurement blocks to be away from one another till the range finder body abuts against the inner wall of the well bottom, and the well bottom diameter is detected through the range finder body. The detection data is sent to external terminal equipment through a wire or in a wireless manner; the device can be suitable for measuring the inner wall of a well hole and the well diameter of the well bottom, and is better in applicability.

Description

Technical Field

[0001] This utility model relates to the field of downhole measuring instruments, specifically a wellbore logging instrument. Background Technology

[0002] In the field of oilfield logging, the commonly used equipment for measuring well diameter is the well diameter logging instrument. For example, the existing Chinese patent with authorization announcement number CN220469900U discloses a multi-directional four-arm well diameter logging instrument, including a measuring cylinder. The outer wall of the measuring cylinder has four sets of sliding grooves arranged in a ring array. Through the cooperation of the rotating rod, mounting block, sleeve, threaded rod and threaded blind hole, it facilitates the disassembly and assembly of the connecting cylinder. The connecting cylinder can be disassembled and bent and stored with the measuring cylinder, which can reduce the space occupied. By setting the anti-detachment part, it limits the threaded rod and avoids the separation of the connecting cylinder and the measuring cylinder after the threaded rod is disassembled. In this way, the measuring cylinder and the connecting cylinder are stored together to avoid the loss of device parts. When the device needs to be reused later, it can be directly installed, which helps to improve installation efficiency. Through the cooperation of the slider, sliding groove, first positioning shell, connecting rod, second positioning shell, fixing block and rangefinder body, it can measure the well diameter.

[0003] However, in practical applications, the above-mentioned logging tool still has the following shortcomings: When the logging tool is used to inspect the wellbore, the slider needs to slide along the groove to unfold the rangefinder body on the connecting rod so that the rangefinder body can contact the inner wall of the wellbore for inspection. However, when the logging tool needs to measure the diameter of the bottom of the well, the rangefinder body cannot contact the well wall at the bottom of the well, so it cannot inspect the inner wall of the bottom of the well, and its applicability is poor. Utility Model Content

[0004] The purpose of this invention is to address the above-mentioned shortcomings by providing a wellbore logging instrument that is applicable to both wellbore inner wall measurement and wellbore diameter measurement at the bottom of the well, thus offering greater applicability.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A caliper logging tool includes a cylindrical hollow outer shell, a connecting cylinder with its bottom fixed to the outer shell, and multiple measuring blocks disposed outside the outer shell for driving the multiple measuring blocks to move closer or further apart using a measurement drive assembly. A rangefinder body is disposed on each measuring block, and the measurement drive assembly is installed inside the outer shell.

[0007] Furthermore, the outer casing is provided with multiple driven grooves, which are radially distributed outward from the axis of the outer casing, and each driven groove corresponds to a measuring block. The measuring drive assembly includes a drive disk rotatably connected inside the outer casing, a motor fixed inside the connecting cylinder, and the output shaft of the motor extending into the outer casing to drive the drive disk. The drive disk is provided with multiple arc-shaped active grooves, which are spirally distributed outward from the axis of the outer casing. A slider is slidably connected in each arc-shaped active groove, one end of which is slidably connected in the driven groove. A measuring arm is connected to the slider, and one end of the measuring arm extends out of the outer casing and connects to the measuring block.

[0008] Furthermore, one side of the measuring block is provided with an arc-shaped contact surface, which is located on the side away from the measuring arm, and the rangefinder body is embedded in the arc-shaped contact surface.

[0009] Furthermore, a pressure sensor is provided on the arc-shaped contact surface.

[0010] Furthermore, the housing also includes a controller, a battery, and a communication transmission module. The measurement drive component, the rangefinder body, the battery, and the communication transmission module are all electrically connected to the controller.

[0011] Furthermore, the outer wall of the outer shell is provided with a plurality of recesses, each of which corresponds to a measuring block. When the measuring block is in the retracted state, the measuring block retracts into the recess.

[0012] The beneficial effects of this utility model are:

[0013] In practical applications, when it is necessary to detect the wellbore diameter at the bottom, the rangefinder body is connected to an external terminal device via wire or wireless connection. The outer casing is placed at the bottom of the well until the bottom of the casing touches the bottom of the well. The measurement drive component drives multiple measuring blocks to move away from each other until the rangefinder body touches the inner wall of the well bottom. The wellbore diameter at the bottom is detected by the rangefinder body, and the detection data is transmitted to the external terminal device via wire or wireless connection. This utility model is applicable to both wellbore inner wall measurement and wellbore diameter measurement at the bottom of the well, thus having better applicability. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is the front view of this utility model;

[0016] Figure 3 yes Figure 2 Sectional view at point AA;

[0017] Figure 4 This is a schematic diagram of the driven groove and the arc-shaped active groove in this utility model;

[0018] Reference numerals: 1. Outer shell; 11. Driven slide groove; 12. Recess; 2. Connecting cylinder; 3. Measuring block; 31. Arc-shaped contact surface; 4. Rangefinder body; 51. Drive disk; 511. Arc-shaped active groove; 52. Motor; 53. Slider; 54. Measuring arm; 55. Pressure sensor; 61. Controller; 62. Battery; 63. Communication transmission module. Detailed Implementation

[0019] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a caliper logging tool includes a cylindrical hollow outer shell 1, a connecting cylinder 2 with its bottom fixed to the outer shell 1, and multiple measuring blocks 3 disposed outside the outer shell 1 for driving the multiple measuring blocks 3 to move closer or further apart from each other using a measurement drive assembly. A rangefinder body 4 is disposed on each measuring block 3, and the measurement drive assembly is installed inside the outer shell 1.

[0020] When it is necessary to detect the wellbore diameter at the bottom, the rangefinder body 4 is connected to an external terminal device via wire or wireless connection. The outer casing 1 is placed at the bottom of the well until the bottom of the outer casing 1 touches the bottom of the well. The measurement drive component drives multiple measuring blocks 3 to move away from each other until the rangefinder body 4 touches the inner wall of the well bottom. The wellbore diameter at the bottom is detected by the rangefinder body 4, and the detection data is transmitted to the external terminal device via wire or wireless connection. This utility model is applicable to both wellbore inner wall measurement and wellbore diameter measurement at the bottom of the well, making it more versatile.

[0021] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the outer casing 1 is provided with multiple driven slide grooves 11, which are radially distributed outward from the axis of the outer casing 1. Each driven slide groove 11 corresponds to a measuring block 3. The measuring drive assembly includes a drive disk 51 rotatably connected inside the outer casing 1 and a motor 52 fixed inside the connecting cylinder 2. The output shaft of the motor 52 extends into the outer casing 1 to drive the drive disk 51. The drive disk 51 is provided with multiple arc-shaped active grooves 511, which are centered on the axis of the outer casing 1. The spiral outward distribution is provided. A slider 53 is slidably connected in the arc-shaped active groove 511. One end of the slider 53 is slidably connected in the driven groove 11. A measuring arm 54 is connected to the slider 53. One end of the measuring arm 54 extends out of the outer shell 1 and is connected to the measuring block 3. In this embodiment, when the motor 52 drives the drive disk 51 to rotate, the drive disk 51 slides along the arc-shaped active groove 511 through the slider 53. At the same time, the slider 53 slides along the driven groove 11, so that the measuring arm 54 gradually extends out of the outer shell 1 and the multiple measuring blocks 3 gradually move away from each other.

[0022] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a circular arc-shaped contact surface 31 is provided on one side of the measuring block 3. The circular arc-shaped contact surface 31 is located on the side away from the measuring arm 54. The rangefinder body 4 is embedded in the circular arc-shaped contact surface 31. In this embodiment, since the circular arc-shaped contact surface 31 fits the inner wall shape of the wellbore better, the detection result is more accurate.

[0023] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a pressure sensor 55 is provided on the arc-shaped contact surface 31; in this embodiment, as the measuring arm 54 gradually extends out of the housing 1 and the multiple measuring blocks 3 gradually move away from each other, the motor 52 stops driving when the multiple pressure sensors 55 detect pressure.

[0024] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the housing 1 also includes a controller 61, a battery 62, and a communication transmission module 63. The measurement drive component, the rangefinder body 4, the battery 62, and the communication transmission module 63 are all electrically connected to the controller 61. In this embodiment, the controller 61 is powered by the battery 62, and the external terminal device is connected via the communication transmission module 63 to transmit the detection results. The well diameter is measured by the rangefinder body 4.

[0025] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a plurality of recesses 12 are provided on the outer side wall of the outer casing 1. Each recess 12 corresponds to a measuring block 3. When the measuring block 3 is in the retracted state, the measuring block 3 retracts into the recess 12. In this embodiment, by retracting the measuring block 3 into the recess 12, the outer casing 1 is prevented from bumping into the rangefinder body 4 during the well lowering process, and the well logging instrument is also facilitated in transportation and carrying.

[0026] The specific embodiments described herein are merely illustrative examples of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the scope defined by this utility model.

Claims

1. A wellbore logging tool, characterized in that: The device includes a cylindrical hollow outer shell, a connecting cylinder with its bottom fixed to the outer shell, multiple measuring blocks disposed outside the outer shell, a measuring drive assembly for driving the multiple measuring blocks to move closer or further apart from each other, a rangefinder body disposed on each measuring block, and the measuring drive assembly installed inside the outer shell.

2. The wellbore logging tool according to claim 1, characterized in that, The outer casing is provided with multiple driven slide grooves, which are radially distributed outward from the axis of the outer casing. Each driven slide groove corresponds to a measuring block. The measuring drive assembly includes a drive disk rotatably connected inside the outer casing, a motor fixed inside the connecting cylinder, and the output shaft of the motor extending into the outer casing to drive the drive disk. The drive disk is provided with multiple arc-shaped active grooves, which are spirally distributed outward from the axis of the outer casing. A slider is slidably connected in each arc-shaped active groove. One end of the slider is slidably connected in the driven slide groove. A measuring arm is connected to the slider. One end of the measuring arm extends out of the outer casing and connects to the measuring block.

3. A wellbore logging tool according to claim 2, characterized in that, The measuring block has an arc-shaped contact surface on one side, which is located away from the measuring arm. The rangefinder body is embedded in the arc-shaped contact surface.

4. The wellbore logging tool according to claim 3, characterized in that, A pressure sensor is provided on the arc-shaped contact surface.

5. A wellbore logging tool according to claim 1, characterized in that, The housing also includes a controller, a battery, and a communication transmission module. The measurement drive component, the rangefinder body, the battery, and the communication transmission module are all electrically connected to the controller.

6. A wellbore logging tool according to claim 1, characterized in that, The outer wall of the outer shell has multiple recesses, each of which corresponds to a measuring block. When the measuring block is in the retracted state, it retracts into the recess.

Images