Downhole depth data acquisition device for logging probe

Abstract

The utility model provides a logging probe lower hole depth data acquisition device, which comprises a feeding auxiliary sleeve, a stabilizing seat, a pulley support, a data transmission module, a pulley guide rail, a rotation counter, a radio frequency reader-writer, a fixed pulley and a logging cable with an electronic tag, and is characterized in that the lower part of the stabilizing seat is connected with the feeding auxiliary sleeve, and the upper part of the stabilizing seat is fixedly connected with the pulley support; the pulley support is connected with the pulley guide rail through a bearing, the pulley guide rail is fixedly connected with the fixed pulley, the pulley support is provided with the data transmission module, the rotation counter and the radio frequency reader-writer, and the logging cable with the electronic tag bypasses the fixed pulley and is connected with the logging probe. The device is simple in structure and high in stability, cable positioning consistency is guaranteed, damage caused by the fact that logging equipment collides with the well wall is prevented, the rotary counter calculates the probe lifting and placing distance through the number of rotation turns of the pulley, the radio frequency reader-writer corrects real-time depth data of the logging probe by recognizing an electronic tag of the logging cable, and the logging equipment is protected from being damaged. And the measured data is more accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of well depth measurement, in particular to a hole depth data acquisition device for a well logging probe. Background Art

[0002] Well logging instruments such as downhole magnetometers and downhole television imagers need to accurately locate the probe depth in real time during operation, so that the downhole information can be strictly matched with the drilling depth. The existing depth positioning methods mainly include:

[0003] (1) Mark the logging cable or connect it to the logging cable with a marked measuring rope, and manually record the probe depth during the lowering and lifting of the probe.

[0004] (2) Connect the logging cable to the fixed pulley. The logging cable drives the fixed pulley to rotate during the lowering and lifting process. The probe depth is calculated in real time based on the number of rotations of the fixed pulley.

[0005] Both methods have major shortcomings: manual recording of probe depth is inefficient and prone to errors, which may cause the recorded depth to not match the actual depth; the fixed pulley mainly relies on the logging cable to drive the fixed pulley to rotate when calculating the probe depth, but when the cable is contaminated with mud or the cable is lifted and lowered too quickly, relative sliding will occur between the cable and the fixed pulley, causing the calculated probe lifting and lowering distance to be less than the actual value. On the other hand, when using manual depth recording or fixed pulley to calculate depth, the logging probe often swings due to the unfixed cable lowering position at the wellhead. The swinging and shaking of the logging probe during the lowering or lifting process is also an important reason for inaccurate depth measurement and even damage to the logging equipment. Therefore, how to improve the stability of the logging cable during the lowering or lifting process and obtain accurate real-time depth data of the probe is an urgent problem to be solved. Utility Model Content

[0006] The utility model aims to solve the problems of probe shaking and inaccurate real-time depth data measurement during the process of lowering and lifting the logging probe, by providing a data acquisition device for the downhole depth of the logging probe in view of the above-mentioned deficiencies in the prior art.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0008] A data acquisition device for the downhole depth of a logging probe, comprising a feeding auxiliary sleeve, a stabilizing seat, a pulley bracket, a data transmission module, a pulley guide, a rotation counter, a radio frequency reader, a fixed pulley and a logging cable with an electronic tag. The lower part of the stabilizing seat is connected to the feeding auxiliary sleeve, and the upper part is fixedly connected to the pulley bracket. The pulley bracket is connected to the pulley guide through a bearing, and the pulley guide is fixedly connected to the fixed pulley. The pulley bracket is provided with a data transmission module, a rotation counter and a radio frequency reader. The logging cable with an electronic tag bypasses the fixed pulley and connects to the logging probe. The outer diameter of the feeding auxiliary sleeve is adapted to the borehole size and is used to be embedded in the borehole wall or sleeve. A handle can also be provided on the stabilizing seat to facilitate the lifting and placing of the feeding auxiliary sleeve. The rotation counter is fixed to the pulley bracket and does not rotate with the pulley guide. The moving distance of the logging probe is obtained by calculating the number of rotations of the pulley guide.

[0009] Preferably, the axis of the logging cable with the electronic tag in the vertical direction coincides with the axis of the feeding auxiliary sleeve.

[0010] Preferably, the radio frequency reader is arranged outside the pulley guide rail and is fixedly connected to the pulley bracket via a radio frequency reader bracket.

[0011] Preferably, the radio frequency reader is arranged inside the pulley guide rail and does not rotate with the pulley guide rail.

[0012] Preferably, the groove depth of the fixed pulley is greater than the diameter of the logging cable with the electronic tag.

[0013] Preferably, the electronic tags on the logging cable with electronic tags are arranged at equal distances.

[0014] Preferably, the data transmission module transmits the data of the rotation counter and the radio frequency reader to the well logging host device through wired transmission and displays it in real time.

[0015] Preferably, the data transmission module transmits the data of the rotation counter and the radio frequency reader to the logging host device through wireless transmission and displays it in real time.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] (1) The device has a simple structure and strong stability. By setting a feed auxiliary sleeve and a stabilizing seat, the device is stabilized at the wellhead. By setting the logging cable that bypasses the fixed pulley to coincide with the axis of the feed auxiliary sleeve in the vertical direction, the consistency of the cable positioning is ensured, inaccurate measurements are avoided, and swinging due to the unfixed lowering position of the cable is avoided, thereby preventing damage caused by the logging equipment hitting the well wall.

[0018] (2) The rotation counter calculates the probe lifting and lowering distance by the number of rotations of the pulley. The radio frequency reader corrects the real-time depth data of the logging probe by identifying the electronic tag of the logging cable, making the measurement data more accurate and solving the problem that the calculated probe lifting and lowering distance is less than the actual value due to the relative slip between the cable and the fixed pulley. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of on-site installation and use of Example 1 of the utility model;

[0021] Figure 2 It is a left side view of the embodiment 1 of the utility model;

[0022] Figure 3 It is a front view of embodiment 1 of the utility model;

[0023] Figure 4 It is a top view of embodiment 1 of the utility model;

[0024] Figure 5 It is a schematic diagram of on-site installation and use of Example 2 of the utility model;

[0025] Figure 6 It is a left side view of Embodiment 2 of the present utility model;

[0026] Figure 7 It is a front view of Embodiment 2 of the present utility model;

[0027] Figure 8 It is a top view of Embodiment 2 of the present utility model;

[0028] Fig. 9 It is a schematic structural diagram of the pulley guide rail of Example 2 of the utility model.

[0029] Description of reference numerals:

[0030] 1. Feed auxiliary sleeve; 2. Stabilizing seat; 3. Pulley bracket; 401. Data transmission module; 402. Pulley guide rail; 403. Rotation counter; 404. RFID reader; 405. RFID reader bracket; 5. Fixed pulley; 6. Logging cable with electronic tag. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] Example 1

[0033] This embodiment provides a data acquisition device for collecting the downhole depth of a logging probe, thereby solving the problems of poor stability of the logging probe during the lifting and lowering process and inaccurate measurement of real-time depth data.

[0034] like Figures 1 to 4 As shown, a data acquisition device for the downhole depth of a logging probe comprises a feeding auxiliary sleeve 1, a stabilizing seat 2, a pulley bracket 3, a data transmission module 401, a pulley guide rail 402, a rotation counter 403, a radio frequency reader 404, a fixed pulley 5 and a logging cable 6 with an electronic tag. The lower part of the stabilizing seat 2 is connected to the feeding auxiliary sleeve 1, and the upper part is fixedly connected to the pulley bracket 3. The pulley bracket 3 is connected to the pulley guide rail 402 through a bearing. The pulley guide rail 402 is fixedly connected to the fixed pulley 5. The pulley bracket 3 is provided with a data transmission module 401, a rotation counter 403 and a radio frequency reader 404. The logging cable 6 with an electronic tag bypasses the fixed pulley 5 and connects to the logging probe. The outer diameter of the feeding auxiliary sleeve 1 is adapted to the borehole size and is used to be embedded in the borehole wall or sleeve. A handle can also be provided on the stabilizing seat 2 to facilitate the lifting and placing of the feeding auxiliary sleeve 1. The rotation counter 403 is fixed on the pulley bracket 3 and does not rotate with the pulley guide rail 402. The moving distance of the logging probe is obtained by counting the number of rotations of the pulley guide rail 402. The axis of the logging cable 6 with the electronic tag in the vertical direction coincides with the axis of the feeding auxiliary sleeve 1.

[0035] The RF reader / writer 404 is arranged outside the pulley guide rail 402 and is fixedly connected to the pulley bracket 3 through the RF reader / writer bracket 405. The RF reader / writer 404 can also be arranged inside the pulley guide rail 402 and does not rotate with the pulley guide rail 402.

[0036] The groove depth of the fixed pulley 5 is greater than the diameter of the logging cable 6 with the electronic tag, so as to ensure that the logging cable 6 with the electronic tag will not slip out of the groove of the fixed pulley 5 during the movement.

[0037] The electronic tags on the logging cable 6 with electronic tags are arranged at equal intervals.

[0038] The data transmission module 401 transmits the data of the rotation counter 403 and the radio frequency reader 404 to the logging host device through wired or wireless transmission and displays it in real time.

[0039] The overall solution to the problem of inaccurate real-time depth data measurement during the lifting and lowering of the logging probe is as follows:

[0040] The utility model must be equipped with a logging cable 6 with an electronic tag. The cable is installed with an electronic tag at a fixed interval. In this embodiment, the interval is 1m, and the electronic tag can be recognized by the radio frequency reader 404. Each electronic tag stores in advance the corresponding probe depth information when the electronic tag moves to the position where the radio frequency reader 404 reads the information when the logging probe is lowered using the device. Before the measurement starts, the initial depth of the logging probe is input through the logging host, and the logging host records the position of the rotation counter 403 at this time through the data transmission module 401. After the measurement starts, the logging cable 6 with the electronic tag drives the fixed pulley 5 to rotate, and the fixed pulley 5 drives the pulley guide 402 to rotate. The relative movement of the pulley guide 402 and the rotation counter 403 is fed back to the logging host through the data transmission module 401, and the logging host calculates and updates the probe depth information in real time. When the logging cable 6 with the electronic tag is contaminated with mud during the lifting and lowering process, the friction between it and the fixed pulley 5 will be greatly reduced. There is a relative displacement between the logging cable 6 with the electronic tag and the fixed pulley 5, resulting in the actual movement distance of the logging cable 6 with the electronic tag often being greater than the calculated movement distance, so it needs to be corrected by the radio frequency reader 404. After the electronic tag moves with the logging cable to the groove of the fixed pulley 5, it will be recognized by the radio frequency reader 404, and the probe depth information is transmitted to the logging host through the data transmission module 401. The host corrects the depth information obtained by the rotation counter 403 through the information recognized by the radio frequency reader 404, thereby realizing accurate measurement of the depth of the logging probe. Because the depth of each lowering exceeds 1m, the probe depth information is accurately calibrated once, and even if slippage occurs, its error is limited to the slippage caused within the range of 1m of lowering, which greatly reduces the measurement error.

[0041] Example 2

[0042] like Figures 5 to 9 As shown, in order to further simplify the device, the difference between this embodiment and embodiment 1 is that the RF reader 404 is installed inside the pulley guide rail 402 and does not rotate with the pulley guide rail 402, so that the RF reader bracket 405 can be directly removed, which is more convenient for lifting and placing the logging cable 6 with the electronic tag.

[0043] In summary, in the present invention, the stability of the lifting and lowering process of the logging probe is ensured by arranging the logging cable 6 with an electronic tag that bypasses the fixed pulley 5 and coincides with the axis of the feed auxiliary sleeve 1 in the vertical direction; the accuracy of the logging probe depth data is ensured by using the rotation counter 403 for measurement and using the logging cable 6 with an electronic tag in conjunction with the radio frequency reader 404 to correct the logging probe depth data.

[0044] The above embodiments of the utility model are described in detail through examples, but the contents described are only exemplary embodiments of the utility model embodiments and cannot be considered to limit the scope of implementation of the utility model embodiments. The protection scope of the utility model embodiments is defined by the claims. Anyone who utilizes the technical solutions described in the utility model embodiments, or who is inspired by the technical solutions of the utility model embodiments, designs similar technical solutions within the essence and protection scope of the utility model embodiments to achieve the above technical effects, or who makes equal changes and improvements to the scope of application, shall still be included in the protection scope of the patent coverage of the utility model embodiments.

Claims

1. A logging probe downhole depth data acquisition device, characterized in that: The invention comprises a feeding auxiliary sleeve (1), a stabilizing seat (2), a pulley bracket (3), a data transmission module (401), a pulley guide rail (402), a rotation counter (403), a radio frequency reader (404), a fixed pulley (5) and a logging cable (6) with an electronic tag. The lower part of the stabilizing seat (2) is connected to the feeding auxiliary sleeve (1), and the upper part is fixedly connected to the pulley bracket (3). The pulley bracket (3) is connected to the pulley guide rail (402) via a bearing. The pulley guide rail (402) is fixedly connected to the fixed pulley (5). The pulley bracket (3) is provided with a data transmission module (401), a rotation counter (403) and a radio frequency reader (404). The logging cable (6) with an electronic tag is passed around the fixed pulley (5) and connected to a logging probe.

2. The logging probe downhole depth data acquisition device according to claim 1 is characterized in that: The axis of the logging cable (6) with the electronic tag in the vertical direction coincides with the axis of the feeding auxiliary sleeve (1).

3. The downhole depth data acquisition device of the well logging probe according to claim 1 is characterized in that: The radio frequency reader (404) is arranged outside the pulley guide rail (402) and is fixedly connected to the pulley bracket (3) via a radio frequency reader bracket (405).

4. The logging probe downhole depth data acquisition device according to claim 1, characterized in that: The radio frequency reader (404) is arranged inside the pulley guide rail (402).

5. The logging probe downhole depth data acquisition device according to claim 1, characterized in that: The groove depth of the fixed pulley (5) is greater than the diameter of the logging cable (6) with the electronic tag.

6. The downhole depth data acquisition device of the well logging probe according to claim 1 is characterized in that: The electronic tags on the logging cable (6) with electronic tags are arranged at equal distances.

7. The downhole depth data acquisition device of a logging probe according to any one of claims 1 to 6, characterized in that: The data transmission module (401) transmits the data of the rotation counter (403) and the radio frequency reader (404) to the well logging host device through wired transmission and displays the data in real time.

8. The downhole depth data acquisition device of a logging probe according to any one of claims 1 to 6, characterized in that: The data transmission module (401) transmits the data of the rotation counter (403) and the radio frequency reader (404) to the well logging host device through wireless transmission and displays it in real time.

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