Small-caliber total gamma and gyro inclinometry combined well logging probe tube

Abstract

The invention belongs to the technical field of uranium exploration logging, and particularly relates to a small-caliber total gamma and gyro inclinometry combined logging probe tube, in the logging probe tube, a transmission outer sleeve and a probe tube pressure-bearing tube are fixedly connected with the two ends of a probe tube connector respectively, and the probe tube connector is fixedly connected to the transmission outer sleeve; a transmission circuit board framework is arranged in the transmission outer sleeve, an acquisition circuit board framework, a gyroscope framework, a gyroscope framework base and a gamma detector fixing copper column which are sequentially connected are arranged in the probe pressure-bearing pipe, and the gamma detector, the transmission circuit board framework and the acquisition circuit board framework are fixedly connected with the two ends of the probe connector respectively; the spring is positioned between the gamma detector and the probe tube bottom sealing head; the exploring tube bottom sealing head is fixedly connected with the exploring tube pressure-bearing tube; a gyroscope module is installed in the gyroscope framework, and a three-axis MEMS gyroscope is adopted as the gyroscope module. The total gamma measurement can be realized, and the azimuth angle and the inclination angle can be continuously measured in a ferromagnetic environment.

Description

Technical Field

[0001] The invention belongs to the technical field of uranium mine exploration and logging, and in particular relates to a small-caliber gamma total amount and gyro inclination combined logging probe. Background Art

[0002] In the exploration of hard rock uranium deposits in southern my country, the introduction and application of small-diameter portable full-hydraulic drilling rigs and drilling technology have achieved good results, which can reduce the damage to the ecological environment and reduce safety risks. The drilling equipment is small and light, easy to move and install. The disadvantage is that it is not convenient for large-diameter drilling. Usually, it is necessary to replace the small-diameter drilling rig to complete the task. The inner diameter of the drill pipe used in the borehole is φ46mm, and the internal measurement of the drill pipe is required during logging. However, the diameter of the current logging probe is φ40mm. During logging operations, problems such as the unsmooth lowering of the logging probe often occur, which affects the efficiency and quality of logging work to a certain extent. In addition, the portable full-hydraulic drilling rig has no external tower, and the distance from the lifter to the hole position is short. The length of the combined gamma total and well inclination logging probe is 1939mm. Although construction can be carried out, it is extremely inconvenient for logging operations.

[0003] Therefore, the small-diameter drilling construction technology has, to a certain extent, restricted the improvement of the efficiency and quality of borehole gamma ray total logging and well inclination logging. The control and application of small-diameter gamma ray total logging and well inclination integrated combined logging is of great significance to comprehensively improving the safety and economic benefits of hard rock uranium exploration. Summary of the invention

[0004] The purpose of the present invention is to provide a small-diameter gamma total and gyro inclination combined logging probe, which can realize gamma total measurement and continuously measure azimuth and inclination in a ferromagnetic environment, effectively overcoming the problems of large diameter and low working efficiency of existing gamma total and well inclination measurement probes.

[0005] The technical solution to achieve the purpose of the present invention is:

[0006] A small-caliber gamma total amount and gyro inclinometer combined well logging probe, the well logging probe comprising: a probe head, a transmission outer sleeve, a transmission circuit board frame, a probe connector, a probe pressure tube, a collection circuit board frame, a gyroscope frame, a gyroscope frame base, a gamma detector fixing copper column, a gamma detector, a spring, and a probe bottom sealing head; the transmission outer sleeve and the probe pressure tube are respectively fixedly connected to the two ends of the probe connector, and the probe head is fixedly connected to the transmission outer sleeve; a transmission circuit board frame is arranged in the transmission outer sleeve, and the transmission circuit board frame is fixed to one end of the probe connector Connection; the probe tube pressure tube is equipped with a collection circuit board skeleton, a gyroscope skeleton, a gyroscope skeleton base, a gamma detector fixing copper column, and a gamma detector; the collection circuit board skeleton is fixedly connected to the other end of the probe tube connector; the collection circuit board skeleton, the gyroscope skeleton, the gyroscope skeleton base, the gamma detector fixing copper column, and the gamma detector are connected in sequence; the spring is located between the gamma detector and the sealing head at the bottom of the probe tube; the sealing head at the bottom of the probe tube is fixedly connected to the probe tube pressure tube; a gyroscope module is installed inside the gyroscope skeleton, and the gyroscope module adopts a three-axis MEMS gyroscope.

[0007] The outer tube diameter of the logging probe is 36 mm and the length is 1300 mm.

[0008] The logging probe also includes a lead-tin combination screen, which is put in from the bottom of the probe pressure tube and sleeved on the gamma detector; the lead-tin combination screen is fixed in the probe pressure tube by a fixed connection between the sealing head at the bottom of the probe and the probe pressure tube.

[0009] The upper end of the gyroscope skeleton is connected to the acquisition circuit board skeleton, the lower end is open, and a 5mm groove is opened on the side for wiring.

[0010] The gamma detector adopts an integrated manner and is composed of a photomultiplier tube and a NaI crystal, wherein the NaI crystal is fixedly connected to the bottom of the photomultiplier tube.

[0011] The transmission circuit board frame, the probe tube connector, the collection circuit board frame, the gyroscope frame, the gyroscope frame base, the gamma detector fixing copper column, and the gamma detector are fixedly connected in sequence by bolts.

[0012] The probe tube head, the transmission outer sleeve, the probe tube connector and the probe tube pressure-bearing tube are fixedly connected in sequence through threads.

[0013] The probe tube pressure-bearing tube is fixedly connected to the sealing head at the bottom of the probe tube by bolts.

[0014] The gyroscope module is fixedly connected to the gyroscope frame by bolts.

[0015] The photomultiplier tube is fixedly connected to the NaI crystal via threads.

[0016] The beneficial technical effects of the present invention are:

[0017] 1. Compared with the traditional gamma ray inclinometer combined logging probe, the small-diameter gamma ray total and gyro inclinometer combined logging probe provided by the present invention has a smaller probe size, an outer tube diameter of 36 mm, and a length of 1300 mm. The reduction in diameter reduces the resistance during logging in the drill pipe, and the shortened length facilitates the construction at the logging site.

[0018] 2. The present invention provides a small-diameter gamma total and gyro inclinometer combined logging probe, which adopts a MEMS gyro inclinometer to achieve accurate azimuth measurement in a ferromagnetic environment. Compared with a fiber optic gyro continuous inclinometer, MESM has a lower cost and can meet the needs of continuous measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of a small-caliber gamma total mass and gyro inclinometer combined well logging probe structure provided by the present invention;

[0020] Figure 2 A schematic diagram of the structure of a gyroscope in a small-caliber gamma total and gyro inclination combined well logging probe provided by the present invention;

[0021] Figure 3 A schematic diagram of a gamma detector in a small-caliber gamma total and gyro inclinometer combined logging probe provided by the present invention;

[0022] In the figure: 1-probe head; 2-transmission outer sleeve; 3-transmission circuit board frame; 4-probe connector; 5-probe pressure tube; 6-collection circuit board frame; 7-gyroscope frame; 8-gyroscope frame base; 9-gamma detector fixing copper column; 10-gamma detector; 11-lead-tin combination screen; 12-spring; 13-probe bottom sealing head; 14-gyroscope module; 15-photomultiplier tube; 16-NaI crystal. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0024] like Figure 1 As shown, the present invention provides a small-caliber gamma total amount and gyro inclinometer combined logging probe, the outer tube diameter is 36mm, the length is 1300mm, including: a probe head 1, a transmission outer sleeve 2, a transmission circuit board frame 3, a probe connector 4, a probe pressure tube 5, a collection circuit board frame 6, a gyroscope frame 7, a gyroscope frame base 8, a gamma detector fixing copper column 9, a gamma detector 10, a lead-tin combination screen 11, a spring 12, and a probe bottom sealing head 13.

[0025] The transmission outer sleeve 2 and the probe pressure tube 5 are respectively fixedly connected to the two ends of the probe connector 4, and the probe head 1 is fixedly connected to the other end of the transmission outer sleeve 2; the probe bottom sealing head 13 is fixedly connected to the other end of the probe pressure tube 5; a transmission circuit board skeleton 3 is arranged in the transmission outer sleeve 2; a collection circuit board skeleton 6, a gyroscope skeleton 7, a gyroscope skeleton base 8, a gamma detector fixing copper column 9, and a gamma detector 10 are arranged in the probe pressure tube 5.

[0026] The probe head 1 is fixedly connected to the transmission outer sleeve 2 by threads; the probe connector 4 is fixedly connected to the transmission outer sleeve 2 by threads; the probe pressure-bearing tube 5 is fixedly connected to the probe connector 4 by threads; the transmission circuit board skeleton 3 is fixedly connected to the probe connector 4 by 4 M3 bolts; the top of the acquisition circuit board skeleton 6 is fixedly connected to the probe connector 4 by 4 M3 bolts; the gyroscope skeleton 7 is fixedly connected to the bottom of the acquisition circuit board skeleton 6 by 4 M3 bolts; the gyroscope skeleton base 8 is fixedly connected to the transmission outer sleeve 2 by threads; the probe connector 4 is fixedly connected to the transmission outer sleeve 2 by threads; the probe pressure-bearing tube 5 is fixedly connected to the probe connector 4 by threads; the transmission circuit board skeleton 3 is fixedly connected to the probe connector 4 by 4 M3 bolts; the top of the acquisition circuit board skeleton 6 is fixedly connected to the probe connector 4 by 4 M3 bolts; the gyroscope skeleton base 8 is fixedly connected to the transmission outer sleeve 2 by threads; the probe pressure-bearing tube 5 is fixedly connected to the transmission outer sleeve 2 by threads; the probe pressure-bearing tube 5 is fixedly connected to the transmission outer sleeve 2 by threads; the probe pressure-bearing tube 5 is fixedly connected to the transmission outer sleeve 2 by threads; the transmission circuit board skeleton 3 is fixedly connected to the probe connector 4 by 4 M3 bolts; the top of the acquisition circuit board skeleton 6 is fixedly connected to the probe connector 4 by 4 M3 bolts; the gyroscope skeleton base 8 is fixedly connected to the transmission outer sleeve 2 by threads; the transmission circuit board skeleton 3 ... transmission circuit board Four M3 bolts are connected to the bottom end of the gyro skeleton 7; the upper end of the gamma detector fixing copper column 9 is connected to the gyro skeleton base 8 through three M2 bolts, and the lower end is connected to the gamma detector 10 through three M2 bolts; the lead-tin combination screen 11 is put in from the bottom of the probe pressure tube 5 and inserted into the gamma detector 10; the spring 12 is located between the gamma detector 10 and the probe bottom sealing head 13; the probe bottom sealing head 13 is fixedly connected to the probe pressure tube 5 through four M3 bolts, and the lead-tin combination screen 11 is fixed at the same time.

[0027] like Figure 2 As shown, the gyroscope skeleton 7 has a gyroscope module 14 installed inside. The upper end of the gyroscope skeleton 7 is connected to the acquisition circuit board skeleton 6, the lower end is open, and a 5mm groove is opened on the side for wiring. The gyroscope module 14 is fixedly connected to the gyroscope skeleton 7 by 4 M3 bolts. The gyroscope module 14 uses a three-axis MEMS gyroscope. Compared with the fiber optic gyroscope, this type of gyroscope has a lower cost and can realize continuous measurement of azimuth. The time interval between two north-seeking is 40 minutes, and the time for a single north-seeking is less than 1 minute.

[0028] like Figure 3 As shown, the gamma detector 10 is integrated in an integrated manner and is composed of a photomultiplier tube 15 and a NaI crystal 16. The NaI crystal 16 is located at the bottom of the photomultiplier tube 15, and the photomultiplier tube 15 and the NaI crystal 16 are connected by threads.

[0029] The specific installation method of a small-caliber gamma total amount and gyro inclinometer combined logging probe provided by the present invention is as follows:

[0030] Step 1: Push the gyroscope module 14 into the cavity from the bottom opening of the gyroscope skeleton 7, align the three M3 threaded holes on the upper part of the gyroscope module 14 with the four threaded holes on the gyroscope skeleton 7, and then fix the connection with M3 bolts; push the gyroscope skeleton base 8 from the bottom of the gyroscope skeleton 7, align the four M3 threaded holes, and fix the connection with M3 bolts.

[0031] Step 2: Align one end of the three gamma detector fixing copper pillars 9 with the three M2 threaded holes on the gyroscope skeleton base 8, and fix them with M2 bolts; the other end of the gamma detector fixing copper pillar 9 is fixed with the three M2 threaded holes on the gamma detector 10 with M2 bolts.

[0032] Step 3: Align the bottom end of the acquisition circuit board skeleton 6 with the four M3 threaded holes at the top end of the gyroscope skeleton 7, and fix the connection with M3 bolts; align the top end of the acquisition circuit board skeleton 6 with the four M3 threaded holes at one end of the probe connector 4, and fix the connection with M3 bolts; place the acquisition circuit board on the acquisition circuit board skeleton 6, align the M2 threaded holes, and fix the connection with M2 bolts.

[0033] Step 4: Align the bottom end of the transmission circuit board skeleton 3 with the four M3 threaded holes at the other end of the probe connector 4, and fix the connection with M3 bolts. Then place the transmission circuit board on the transmission circuit board skeleton 3, align the four M2.5 threaded holes, and fix the connection with M2.5 bolts.

[0034] Step 5: Push the probe pressure tube 5 upward from the end of the gamma detector 10, and fix it with the thread of the probe connector 4; push the lead-tin combination screen 11 from the bottom of the probe pressure tube 5, and then put the spring 12 into the bottom of the probe pressure tube 5; press the spring 12 from the bottom of the probe pressure tube 5 with the probe bottom sealing head 13, push it into the bottom of the probe pressure tube 5, align the four M3 threaded holes respectively, and fix it with M3 bolts.

[0035] Step 6: Push the transmission outer sleeve 2 downward from the top of the transmission circuit board 3 and fix it with the thread of the probe connector 4.

[0036] Step 7: Fix the probe head 1 to the thread of the transmission outer sleeve 2.

[0037] The small-caliber gamma total amount and gyro inclination combined logging probe provided by the present invention is used to perform well logging operations, and the specific steps are as follows:

[0038] Insert the external cable connection plug into the probe head 1, and connect the other end of the cable connection to the ground controller. After starting the ground controller, provide the combined probe with a 120V DC voltage through the cable connection, and the combined probe is powered on and started. The gyro module 14 begins to enter the automatic north-seeking state, and the north-seeking time is 1 minute; the gamma detector 10 starts working. After the gyro module 14 finishes the north-seeking, the combined probe uploads the inclination, azimuth, tool face data of the gyro module 14 and the gamma pulse count of the gamma detector 10 to the ground controller, and the ground controller then uploads the data to the computer via USB. The measured data can be viewed in real time on the computer and stored on the computer.

[0039] The present invention is described in detail above with reference to the accompanying drawings and embodiments, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of ordinary technicians in the field without departing from the purpose of the present invention. The contents not described in detail in the present invention can adopt the existing technology.

Claims

1. A small-caliber gamma total and gyro inclinometer combined logging probe, characterized in that: The logging probe comprises: a probe head (1), a transmission outer sleeve (2), a transmission circuit board frame (3), a probe connector (4), a probe pressure-bearing tube (5), a collection circuit board frame (6), a gyroscope frame (7), a gyroscope frame base (8), a gamma detector fixing copper column (9), a gamma detector (10), a spring (12), and a probe bottom sealing head (13); the transmission outer sleeve (2) and the probe pressure-bearing tube (5) are respectively fixedly connected to the two ends of the probe connector (4), and the probe head (1) is fixedly connected to the transmission outer sleeve (2); a transmission circuit board frame (3) is arranged inside the transmission outer sleeve (2), and the transmission circuit board frame (3) is fixedly connected to one end of the probe connector (4); a probe pressure-bearing tube (5) is arranged inside The invention comprises a collection circuit board frame (6), a gyroscope frame (7), a gyroscope frame base (8), a gamma detector fixing copper column (9), and a gamma detector (10); the collection circuit board frame (6) is fixedly connected to the other end of the probe tube connector (4); the collection circuit board frame (6), the gyroscope frame (7), the gyroscope frame base (8), the gamma detector fixing copper column (9), and the gamma detector (10) are connected in sequence; the spring (12) is located between the gamma detector (10) and the probe tube bottom sealing head (13); the probe tube bottom sealing head (13) is fixedly connected to the probe tube pressure bearing tube (5); a gyroscope module (14) is installed inside the gyroscope frame (7); the gyroscope module (14) adopts a three-axis MEMS gyroscope.

2. A small-diameter gamma total and gyro inclinometer combined logging probe according to claim 1, characterized in that: The outer tube diameter of the logging probe is 36 mm and the length is 1300 mm.

3. A small-diameter gamma total and gyro inclinometer combined logging probe according to claim 1, characterized in that: The logging probe also includes a lead-tin combination screen (11), which is inserted from the bottom of the probe pressure tube (5) and inserted into the gamma detector (10); the lead-tin combination screen (11) is fixed in the probe pressure tube (5) by a fixed connection between a sealing head (13) at the bottom of the probe and the probe pressure tube (5).

4. A small-diameter gamma total and gyro inclinometer combined logging probe according to claim 1, characterized in that: The upper end of the gyroscope frame (7) is connected to the acquisition circuit board frame (6), the lower end is open, and a 5 mm groove is opened on the side for wiring.

5. A small-diameter gamma total and gyro inclinometer combined logging probe according to claim 1, characterized in that: The gamma detector (10) is integrated in an integrated manner and is composed of a photomultiplier tube (15) and a NaI crystal (16), wherein the NaI crystal (16) is fixedly connected to the bottom of the photomultiplier tube (15).

6. A small-diameter gamma total and gyro inclinometer combined logging probe according to claim 1, characterized in that: The transmission circuit board frame (3), the probe tube connector (4), the collection circuit board frame (6), the gyroscope frame (7), the gyroscope frame base (8), the gamma detector fixing copper column (9), and the gamma detector (10) are fixedly connected in sequence by bolts.

7. A small-diameter gamma total and gyro inclinometer combined logging probe according to claim 1, characterized in that: The probe head (1), the transmission outer sleeve (2), the probe connector (4) and the probe pressure-bearing tube (5) are sequentially fixedly connected via threads.

8. The small-diameter gamma total mass and gyro inclinometer combined logging probe according to claim 1, characterized in that: The probe tube pressure-bearing tube (5) is fixedly connected to the probe tube bottom sealing head (13) by means of bolts.

9. A small-diameter gamma total mass and gyro inclinometer combined logging probe according to claim 1, characterized in that: The gyroscope module (14) is fixedly connected to the gyroscope frame (7) by means of bolts.

10. A small-diameter gamma total mass and gyro inclinometer combined logging probe according to claim 5, characterized in that: The photomultiplier tube (15) is fixedly connected to the NaI crystal (16) via threads.

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