A rotary safety magnetic positioning logging tool

Abstract

The present invention relates to a rotary safety magnetic positioning logging instrument, which is composed of a bridle assembly, a rotary balancing assembly and a magnetic positioning assembly connected in sequence; the bridle assembly comprises a torpedo spring, a torpedo spring seat, a salvage tube and a torpedo single cone sleeve; the rotary balancing assembly comprises a rotary upper joint, a threaded ring, a wire barrel, a female pin sleeve, a female pin, a single-core slip ring, a hollow shaft, a rotary fixed joint, a rotary movable joint, a balancing shaft cylinder, a balancing piston, a balancing cylinder, a pressure plate and a single-core connecting seat; the magnetic positioning assembly comprises an upper magnetic steel cylinder, a front magnetic outer cylinder, a coil frame, a magnetic steel, a cement resistor, a lower magnetic steel cylinder and an adapter; the present invention integrates the functions of a safety bridle, a rotary short-circuit logging instrument and a magnetic positioning logging instrument, and has a reasonable structure, a small length, a light weight, safety and reliability, and convenient maintenance.

Description

Technical Field

[0001] The invention relates to the technical field of petroleum well logging, in particular to a rotary safety magnetic positioning well logging instrument. Background Art

[0002] In oil well logging, perforating, well coring and other operations using logging cables, three common logging instruments are needed: safety bridle, rotary short-circuit logging tool and magnetic positioning logging tool.

[0003] The safety bridle connects the cable and logging instrument, transmits signals and protects the logging cable. When the logging instrument is blocked underground and the tension approaches the upper limit of the safe use of the logging cable, the tension rod in the bridle breaks, and the logging cable is disconnected from the logging instrument and safely brought up to the well.

[0004] The rotary short-circuit logging instrument has the function of connecting logging instruments, transmitting signals and protecting logging cables. In the actual logging process, downhole instruments mostly use combined instruments and there are a large number of them. Therefore, the logging cable bears a large load. At the same time, the logging cable must overcome its own torque (when the downhole instrument is placed underground or lifted upward, the lower part of the logging instrument string is suspended, so it will rotate and generate torque). In the absence of a rotary short-circuit, the torque of the logging instrument string rotation will be transmitted to the logging cable. When the torque is large, it may even break the logging cable, causing a serious accident.

[0005] The magnetic locator is an instrument used to measure the position of the casing collar in the borehole. It consists of a permanent magnet and a coil installed in a non-magnetic material shell. When the downhole instrument moves through the casing collar in the well, the thickening of the pipe wall at the casing collar changes the distribution of the magnetic field around the magnet, causing the magnetic flux passing through the coil to change and generate an induced electromotive force. By recording the magnitude of the induced current, a casing collar curve will be obtained. According to the casing collar curve, combined with the radioactive logging curve, the position of the downhole instrument or perforation operation can be accurately determined.

[0006] At present, conventional safety bridles, rotary short-circuit logging instruments, and magnetic positioning logging instruments are all single-function logging instruments, which need to be assembled repeatedly during logging. The overall length and weight of the instruments after being assembled are also relatively large. Especially for perforating operations, each well must be repeatedly lowered into the well dozens or even dozens of times, resulting in a heavy workload during on-site assembly and operations in and out of the well. Summary of the invention

[0007] The invention provides a rotary safety magnetic positioning logging instrument, which integrates the functions of a safety bridle, a rotary short-circuit logging instrument and a magnetic positioning logging instrument, and has a reasonable structure, a short length, a light weight, safety, reliability and convenient maintenance.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] A rotary safety magnetic positioning logging instrument, which is composed of a bridle assembly, a rotary balancing assembly and a magnetic positioning assembly connected in sequence; the bridle assembly includes a torpedo spring, a torpedo spring seat, a salvage tube and a torpedo single cone sleeve, the torpedo spring, the torpedo spring seat and the salvage tube are connected in sequence, and the torpedo single cone sleeve is placed in the salvage tube; the rotary balancing assembly includes a rotary upper joint, a threaded ring, a wire barrel, a female pin sleeve, a female pin, a single-core slip ring, a hollow shaft, a rotary fixed joint, a rotary movable joint, a balancing shaft barrel, a balancing piston, a balancing cylinder, a pressure plate and a single-core connecting seat; the salvage tube is connected to the rotary upper joint through a threaded ring, and an extended sealing connector and a wire barrel are provided in the rotary upper joint, and a female pin sleeve and a female pin are provided in the wire barrel for connecting the logging cable core with the single-core slip ring; the rotary upper joint, the rotary fixed joint and the rotary movable joint are connected in sequence, and a seal is provided between the rotary fixed joint and the rotary movable joint Rotational connection, the hollow shaft runs through the connector of the three; the single-core slip ring is arranged at one end of the hollow shaft close to the rotating upper joint; the rotating movable joint is connected to the balancing cylinder, and the balancing cylinder is provided with a balancing shaft cylinder, a pressure plate and a single-core connecting seat in sequence, wherein the balancing shaft cylinder is arranged close to one end of the hollow shaft; a balancing piston is arranged in the annular space between the balancing cylinder and the balancing shaft cylinder, and the balance of internal and external pressures is achieved through axial movement of the balancing piston; a sealing plug is arranged on the pressure plate; the magnetic positioning assembly comprises an upper magnetic steel cylinder, a front magnetic outer cylinder, a coil frame, a magnet, a cement resistor, a lower magnetic steel cylinder and an adapter; the front magnetic outer cylinder is connected to the balancing cylinder, and the coil frame is fixed in the front magnetic outer cylinder through the upper magnetic steel cylinder and the lower magnetic steel cylinder arranged at its two ends, and the upper magnetic steel cylinder and the lower magnetic steel cylinder are respectively equipped with magnets; the upper magnetic steel cylinder is connected to the single-core connecting seat through a single-core connector 1; the lower magnetic steel cylinder is connected to the adapter through a single-core connector 2, and a cement resistor is arranged in the lower magnetic steel cylinder.

[0010] The torpedo spring is connected to the torpedo spring seat through a spring spiral groove, and the torpedo spring seat is connected to the salvage tube through a threaded connection and locked by a set screw to prevent rotation; the torpedo single cone sleeve and the salvage tube are positioned by matching cone surfaces, and during logging installation, the steel wires of multiple logging cables pass through the annular gap of the matching cone surfaces and are folded back and wrapped twice; a positioning sleeve is set between the torpedo single cone sleeve and the rotating upper joint, and a torpedo single cone sleeve spacer is set at one end of the positioning sleeve corresponding to the torpedo single cone sleeve, and the torpedo single cone sleeve spacer and the positioning sleeve are positioned by matching stoppers; after the bridle assembly is assembled, the torpedo single cone sleeve is axially positioned and fixed by the pushing force of the rotating upper joint and the gravity of the rotating balance assembly and the magnetic positioning assembly.

[0011] An anti-rotation pin is arranged between the salvage tube and the rotating upper joint; the threaded ring is a split structure, which is combined into one by connecting screws.

[0012] An oil plug is provided on the outer side of the rotating upper joint at the position corresponding to the wire barrel, which is used to inject silicone oil into the rotating balancing component. The oil plug extends into the radial hole of the wire barrel to play an axial positioning role for the wire barrel.

[0013] The single-core slip ring is provided with a slip ring puller at the shaft head near one end of the wire barrel, and a radial screw is provided at the corresponding end of the wire barrel to limit the rotation of the slip ring puller; the single-core slip ring is fixedly connected to the hollow shaft by screws.

[0014] The end face and inner hole of the hollow shaft are provided with grooves for the flow of silicone oil; a thrust ball bearing is arranged between the hollow shaft and the rotating fixed joint; brass sleeves are respectively arranged at both ends of the rotating fixed joint and are sleeved on the hollow shaft, lip oil seals are respectively arranged at the outer ends of the yellow sleeves, and a sealing ring is arranged between the middle part of the rotating fixed joint and the hollow shaft; the rotating fixed joint is connected to the rotating upper joint through a thread, and a rotating fixed sealing disk, a thrust needle roller bearing and a rotating dynamic sealing disk are arranged in sequence between the rotating fixed joint and the rotating movable joint; the rotating movable joint is connected to the hollow shaft through an internal thread, and is connected to the balancing cylinder through an external thread; the end of the hollow shaft away from the rotating upper joint is locked and fixed by a locking nut, the locking nut is connected to the rotating upper joint through a thread, and is locked by multiple axial and radial set screws.

[0015] Sealing rings are arranged between the balancing piston and the balancing cylinder, and between the balancing piston and the balancing shaft cylinder; a spring is arranged between the balancing shaft cylinder and the balancing piston to reset the balancing piston under normal pressure.

[0016] The pressure plate is connected to the single-core connection seat by screws, and the single-core connection seat and the balance cylinder are positioned and fixed by stoppers and hole retaining springs; the single-core connector 1 and the single-core connection seat are positioned by stoppers and hole retaining springs.

[0017] The front magnetic outer cylinder is connected to the balance cylinder through a thread, and the upper magnetic steel cylinder and the lower magnetic steel cylinder are connected to the coil frame through threads respectively; a vibration damping pad is arranged between the front magnetic outer cylinder and the upper magnetic steel cylinder, and a hole retaining spring is arranged between the front magnetic outer cylinder and the lower magnetic steel cylinder; felt pads for magnetic steel shock absorption are also arranged in the upper magnetic steel cylinder and the lower magnetic steel cylinder respectively; the single-core connector 1 and the upper magnetic steel cylinder, the single-core connector 2 and the lower magnetic steel cylinder, and the single-core connector 2 and the adapter are all positioned by stoppers and hole retaining springs; the single-core connector 1 and the single-core connector 2 are both composed of a single-core male socket and a single-core female socket.

[0018] Resistance vibration damping pads are respectively arranged at both ends of the cement resistor.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1) The rotary safety magnetic positioning logging tool of the present invention is an integrated instrument that integrates the functions of a safety bridle, a rotary short-circuit logging tool, and a magnetic positioning logging tool, that is, it has three functions: logging cable tension load protection, cable winding protection, and perforation operation magnetic positioning; its structural design is reasonable and compact, which effectively reduces the total length and total weight, and does not require on-site assembly during use, thereby reducing the on-site work intensity and workload;

[0021] 2) The steel wire of the logging cable is wound twice on the torpedo single cone sleeve and pressed and fixed. The safe use load of the logging cable can be adjusted by the percentage of the wound logging cable steel wire to the total logging cable steel wire, thereby eliminating the conventional tension rod assembly, making the overall structure simpler and safer;

[0022] 3) Single-core connector 1 and single-core connector 2 both adopt quick installation method, which is convenient for on-site replacement and maintenance;

[0023] 4) The overall structure is designed for perforating operations, and vibration reduction components are installed at various locations of the magnetic positioning assembly; this not only avoids damage to the magnetic steel and the upper and lower magnetic steel cylinders caused by mechanical vibration, but also adds measures to prevent the resistor from damaging the coil due to impact current. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The figure is an appearance diagram of a rotary safety magnetic positioning logging instrument described in the present invention.

[0025] Figure 2 It is a main cross-sectional view of a rotary safety magnetic positioning logging instrument described in the present invention.

[0026] Figure 3 This is a partial section of a rotary safety magnetic positioning logging tool described in the present invention. Figure 1 (Paragraph Ⅰ).

[0027] Figure 4 This is a partial section of a rotary safety magnetic positioning logging tool described in the present invention. Figure 2 (Paragraph Ⅱ).

[0028] Figure 5 This is a partial section of a rotary safety magnetic positioning logging tool described in the present invention. Figure 3 (Paragraph III).

[0029] Figure 6 yes Figure 4 AA view in.

[0030] In the figure: 1. Torpedo spring 2. Torpedo spring seat 3. Overshot tube 4. Torpedo single cone sleeve 5. Torpedo cone sleeve spacer 6. Positioning sleeve 7. Sealing ring 8. Anti-rotation pin 9. Extended sealing connector 10. Rotating upper joint 11. Connecting screw 12. Threaded ring 13. Wire barrel 14. Female pin sleeve 15. Female pin 16. Oil plug 17. Slip ring puller 18. Single core slip ring 19. Hollow shaft 20. Thrust ball bearing 21. Lip oil seal 22. Brass bushing 23. Rotating fixed joint 24. Thrust roller Needle bearing 25. Rotating fixed sealing plate 26. Rotating dynamic sealing plate 27. Rotating dynamic joint 28. Locking nut 29. Balance shaft cylinder 30. Balance piston 31. Balance cylinder 32. Spring 33. Sealing plug 34. Pressure plate 35. Single core connector 36. Single core male socket 37. Single core female socket 38. Vibration damping pad 39. Upper magnetic steel cylinder 40. Felt pad 41. Front magnetic outer cylinder 42. Coil frame 43. Magnetic steel 44. Cement resistor 45. Lower magnetic steel cylinder 46. Resistor vibration damping pad 47. Adapter DETAILED DESCRIPTION

[0031] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings:

[0032] like Figure 1-Figure 6As shown, the rotary safety magnetic positioning logging instrument of the present invention is composed of a bridle assembly, a rotary balancing assembly and a magnetic positioning assembly connected in sequence; the bridle assembly includes a torpedo spring 1, a torpedo spring seat 2, a salvage tube 3 and a torpedo single cone sleeve 4, the torpedo spring 1, the torpedo spring seat 2 and the salvage tube 3 are connected in sequence, and the torpedo single cone sleeve 4 is placed in the salvage tube 3; the rotary balancing assembly includes a rotary upper joint 10, a threaded ring 12, a wire barrel 13, a female pin sleeve 14, a female pin 15, a single-core slip ring 18, a hollow shaft 19, a rotary fixed joint 23 , a rotary joint 27, a balancing shaft cylinder 29, a balancing piston 30, a balancing cylinder 31, a pressure plate 34 and a single-core connecting seat 35; the salvage tube 3 is connected to the rotary upper joint 10 through a threaded ring 12, and the rotary upper joint 10 is provided with an extended sealing connector 9 and a wire barrel 13, and the wire barrel 13 is provided with a female pin sleeve 14 and a female pin 15 for connecting the cable core of the logging cable with the single-core slip ring 18; the rotary upper joint 10, the rotary fixed joint 23 and the rotary joint 27 are connected in sequence, wherein the rotary fixed joint 23 and the rotary joint 27 are sealed and rotated. The hollow shaft 19 passes through the connecting body of the three; the single-core slip ring 18 is arranged at one end of the hollow shaft 19 close to the rotating upper joint 10; the rotating joint 27 is connected to the balancing cylinder 31, and the balancing cylinder 31 is provided with a balancing shaft cylinder 29, a pressure plate 34 and a single-core connecting seat 35 in sequence, wherein the balancing shaft cylinder 29 is arranged close to one end of the hollow shaft 19; a balancing piston 30 is arranged in the annular space between the balancing cylinder 31 and the balancing shaft cylinder 29, and the balance of the internal and external pressures is achieved by the axial movement of the balancing piston 30; a sealing plug 33 is provided on the pressure plate 34; the magnetic positioning assembly includes an upper Magnetic steel cylinder 39, front magnetic outer cylinder 41, coil frame 42, magnet 43, cement resistor 44, lower magnetic steel cylinder 45 and adapter 47; the front magnetic outer cylinder 41 is connected to the balance cylinder 31, the coil frame 42 is fixed in the front magnetic outer cylinder 41 through the upper magnetic steel cylinder 39 and the lower magnetic steel cylinder 45 arranged at both ends thereof, and the upper magnetic steel cylinder 39 and the lower magnetic steel cylinder 45 are respectively equipped with magnet 43; the upper magnetic steel cylinder 39 is connected to the single-core connecting seat 35 through the single-core connector 1; the lower magnetic steel cylinder 45 is connected to the adapter 47 through the single-core connector 2, and the lower magnetic steel cylinder 45 is equipped with a cement resistor 44.

[0033] The torpedo spring 1 is connected to the torpedo spring seat 2 through a spring spiral groove, and the torpedo spring seat 2 is connected to the salvage tube 3 through a threaded connection and locked by a set screw to prevent rotation; the torpedo single cone sleeve 4 and the salvage tube 3 are positioned by matching cone surfaces, and during logging installation, the steel wires of multiple logging cables pass through the annular gap of the matching cone surfaces and are folded back and wrapped twice; a positioning sleeve 6 is set between the torpedo single cone sleeve 4 and the rotating upper joint 10, and a torpedo single cone sleeve spacer 5 is set at one end of the positioning sleeve 6 corresponding to the torpedo single cone sleeve 4, and the torpedo single cone sleeve spacer 5 and the positioning sleeve 6 are positioned by matching stoppers; after the bridle assembly is assembled, the torpedo single cone sleeve 4 is axially positioned and fixed by the pushing force of the rotating upper joint 10 and the gravity of the rotating balance assembly and the magnetic positioning assembly.

[0034] An anti-rotation pin 8 is provided between the salvage tube 3 and the rotating upper joint 10 ; the threaded ring 12 is a split structure, which is integrated into one by connecting screws 11 .

[0035] An oil plug 16 is provided on the outer side of the rotating upper joint 10 at a position corresponding to the wire barrel 13 for injecting silicone oil into the rotating balancing assembly. The oil plug extends into the radial hole of the wire barrel 13 to axially position the wire barrel 13 .

[0036] The single-core slip ring 18 is provided with a slip ring puller 17 at the shaft head near one end of the wire barrel 13, and a radial screw is provided at the corresponding end of the wire barrel 13 to limit the rotation of the slip ring puller 17; the single-core slip ring 18 is fixedly connected to the hollow shaft 19 by screws.

[0037] The end face and inner hole of the hollow shaft 19 are provided with grooves for the flow of silicone oil; a thrust ball bearing 20 is arranged between the hollow shaft 19 and the rotating fixed joint 23; brass sleeves 22 are respectively arranged at both ends of the rotating fixed joint 23 and are sleeved on the hollow shaft 19, and lip oil seals 21 are respectively arranged at the outer ends of the yellow sleeves 22, and a sealing ring 7 is arranged between the middle part of the rotating fixed joint 23 and the hollow shaft 19; the rotating fixed joint 23 is connected to the rotating upper joint 10 through a thread, and a rotating fixed sealing disk 25, a thrust needle bearing 24 and a rotating dynamic sealing disk 26 are arranged in sequence between the rotating fixed joint 23 and the rotating movable joint 27; the rotating movable joint 27 is connected to the hollow shaft 19 through an internal thread and is connected to the balancing cylinder 31 through an external thread; the end of the hollow shaft 19 away from the rotating upper joint 10 is locked and fixed by a locking nut 28, and the locking nut 28 is connected to the rotating upper joint 10 through a thread, and is locked by multiple axial and radial set screws (such as Figure 6 shown).

[0038] Sealing rings are provided between the balancing piston 30 and the balancing cylinder 31 and between the balancing piston 30 and the balancing shaft cylinder 29 . A spring 32 is provided between the balancing shaft cylinder 29 and the balancing piston 30 to reset the balancing piston 30 under normal pressure.

[0039] The pressure plate 34 is connected to the single-core connection seat 35 by screws, and the single-core connection seat 35 and the balance cylinder 31 are positioned and fixed by stoppers and hole retaining springs; the single-core connector 1 and the single-core connection seat 35 are positioned by stoppers and hole retaining springs.

[0040] The front magnetic outer cylinder 41 is connected to the balance cylinder 31 through threads, and the upper magnetic steel cylinder 39 and the lower magnetic steel cylinder 45 are connected to the coil frame 42 through threads respectively; a vibration damping pad 38 is arranged between the front magnetic outer cylinder 41 and the upper magnetic steel cylinder 39, and a hole retaining spring is arranged between the front magnetic outer cylinder 41 and the lower magnetic steel cylinder 45; felt pads 40 for shock absorption of the magnet 43 are also arranged in the upper magnetic steel cylinder 39 and the lower magnetic steel cylinder 45 respectively; the single-core connector 1 and the upper magnetic steel cylinder 39, the single-core connector 2 and the lower magnetic steel cylinder 45, and the single-core connector 2 and the adapter 47 are all positioned by stoppers and hole retaining springs; the single-core connector 1 and the single-core connector 2 are both composed of a single-core male socket 36 and a single-core female socket 37.

[0041] Resistance vibration-damping pads 46 are respectively provided at both ends of the cement resistor 44 .

[0042] The anti-rotation pin is arranged between the overshot tube and the rotating upper joint to prevent the relative rotation between the two from twisting off the logging cable core. The sealing plug, single-core connector 1 and single-core connector 2 are used to connect the slip ring conductor and the magnetic positioning coil. The cement resistor is used to protect the front magnetic coil from the impact of instantaneous current, and the resistor vibration damping pad is used to prevent the impact vibration from damaging the cement resistor.

[0043] The main parts of the rotary safety magnetic positioning logging instrument described in the present invention are all made of titanium alloy materials. The total length of the instrument is 40% of that of the conventional combined instrument, while the weight is only 30% of that of the conventional combined instrument. (The length of the conventional bridle is 957mm and the weight is 17.2kg, the length of the conventional rotary short-circuit logging instrument is 1536mm and the weight is 26.8kg, the length of the conventional magnetic positioning logging instrument is 720mm and the weight is 18.4kg; while the length of the integrated rotary safety magnetic positioning logging instrument described in the present invention is 1320mm and the weight is 23.6kg). It not only reduces the work intensity of the perforating operation, but also improves the work efficiency on site and reduces the maintenance cost of the equipment.

[0044] When maintaining the rotary safety magnetic positioning logging instrument described in the present invention, it is only necessary to rotate the threaded ring and remove the salvage tube to replace the torpedo single cone sleeve and the sealing plug. Since the logging cable steel wire is fixed by winding and pressing the torpedo single cone sleeve twice, the phenomenon of steel wire sliding out caused by uneven pressing force when using the traditional three cone sleeve can be effectively prevented, thereby making the logging operation safer and more reliable.

[0045] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A rotary safety magnetic positioning logging tool, characterized in that: It is composed of a bridle assembly, a rotating balance assembly and a magnetic positioning assembly connected in sequence; the bridle assembly includes a torpedo spring, a torpedo spring seat, a salvage tube and a torpedo single cone sleeve, the torpedo spring, the torpedo spring seat and the salvage tube are connected in sequence, and the torpedo single cone sleeve is placed in the salvage tube; the rotating balance assembly includes a rotating upper joint, a threaded ring, a wire barrel, a female pin sleeve, a female pin, a single-core slip ring, a hollow shaft, a rotating fixed joint, a rotating movable joint, a balancing shaft barrel, a balancing piston, a balancing cylinder, a pressure plate and a single-core connecting seat; the salvage tube is connected to the rotating upper joint through a threaded ring, and an extended sealing connector and a wire barrel are provided in the rotating upper joint, and a female pin sleeve and a female pin are provided in the wire barrel for connecting the cable core of the logging cable with the single-core slip ring; the rotating upper joint, the rotating fixed joint and the rotating movable joint are connected in sequence, wherein the rotating fixed joint and the rotating movable joint are sealed and rotatably connected, and the hollow The shaft runs through the connector of the three; the single-core slip ring is arranged at one end of the hollow shaft close to the rotating upper joint; the rotating movable joint is connected to the balancing cylinder, and a balancing shaft cylinder, a pressure plate and a single-core connecting seat are arranged in sequence in the balancing cylinder, wherein the balancing shaft cylinder is arranged close to one end of the hollow shaft; a balancing piston is arranged in the annular space between the balancing cylinder and the balancing shaft cylinder, and the balance of internal and external pressures is achieved through axial movement of the balancing piston; a sealing plug is arranged on the pressure plate; the magnetic positioning assembly comprises an upper magnetic steel cylinder, a front magnetic outer cylinder, a coil frame, a magnet, a cement resistor, a lower magnetic steel cylinder and an adapter; the front magnetic outer cylinder is connected to the balancing cylinder, and the coil frame is fixed in the front magnetic outer cylinder through the upper magnetic steel cylinder and the lower magnetic steel cylinder arranged at both ends thereof, and magnets are respectively installed in the upper magnetic steel cylinder and the lower magnetic steel cylinder; the upper magnetic steel cylinder is connected to the single-core connecting seat through a single-core connector 1; the lower magnetic steel cylinder is connected to the adapter through a single-core connector 2, and a cement resistor is arranged in the lower magnetic steel cylinder.

2. A rotary safety magnetic positioning logging tool according to claim 1, characterized in that: The torpedo spring is connected to the torpedo spring seat through a spring spiral groove, and the torpedo spring seat is connected to the salvage tube through a threaded connection and locked by a set screw to prevent rotation; the torpedo single cone sleeve and the salvage tube are positioned by matching cone surfaces, and during logging installation, the steel wires of multiple logging cables pass through the annular gap of the matching cone surfaces and are folded back and wrapped twice; a positioning sleeve is set between the torpedo single cone sleeve and the rotating upper joint, and a torpedo single cone sleeve spacer is set at one end of the positioning sleeve corresponding to the torpedo single cone sleeve, and the torpedo single cone sleeve spacer and the positioning sleeve are positioned by matching stoppers; after the bridle assembly is assembled, the torpedo single cone sleeve is axially positioned and fixed by the pushing force of the rotating upper joint and the gravity of the rotating balance assembly and the magnetic positioning assembly.

3. The rotary safety magnetic positioning logging tool according to claim 1, characterized in that: An anti-rotation pin is arranged between the salvage tube and the rotating upper joint; the threaded ring is a split structure, which is combined into one by connecting screws.

4. The rotary safety magnetic positioning logging tool according to claim 1, characterized in that: An oil plug is provided on the outer side of the rotating upper joint at the position corresponding to the wire barrel, which is used to inject silicone oil into the rotating balancing component. The oil plug extends into the radial hole of the wire barrel to play an axial positioning role for the wire barrel.

5. The rotary safety magnetic positioning logging tool according to claim 1, characterized in that: The single-core slip ring is provided with a slip ring puller at the shaft head near one end of the wire barrel, and a radial screw is provided at the corresponding end of the wire barrel to limit the rotation of the slip ring puller; the single-core slip ring is fixedly connected to the hollow shaft by screws.

6. The rotary safety magnetic positioning logging tool according to claim 1, characterized in that: The end face and inner hole of the hollow shaft are provided with grooves for the flow of silicone oil; a thrust ball bearing is arranged between the hollow shaft and the rotating fixed joint; brass sleeves are respectively arranged at both ends of the rotating fixed joint and are sleeved on the hollow shaft, lip oil seals are respectively arranged at the outer ends of the yellow sleeves, and a sealing ring is arranged between the middle part of the rotating fixed joint and the hollow shaft; the rotating fixed joint is connected to the rotating upper joint through a thread, and a rotating fixed sealing disk, a thrust needle roller bearing and a rotating dynamic sealing disk are arranged in sequence between the rotating fixed joint and the rotating movable joint; the rotating movable joint is connected to the hollow shaft through an internal thread, and is connected to the balancing cylinder through an external thread; the end of the hollow shaft away from the rotating upper joint is locked and fixed by a locking nut, the locking nut is connected to the rotating upper joint through a thread, and is locked by multiple axial and radial set screws.

7. The rotary safety magnetic positioning logging tool according to claim 1, characterized in that: Sealing rings are arranged between the balancing piston and the balancing cylinder, and between the balancing piston and the balancing shaft cylinder; a spring is arranged between the balancing shaft cylinder and the balancing piston to reset the balancing piston under normal pressure.

8. The rotary safety magnetic positioning logging tool according to claim 1, characterized in that: The pressure plate is connected to the single-core connection seat by screws, and the single-core connection seat and the balance cylinder are positioned and fixed by stoppers and hole retaining springs; the single-core connector 1 and the single-core connection seat are positioned by stoppers and hole retaining springs.

9. The rotary safety magnetic positioning logging tool according to claim 1, characterized in that: The front magnetic outer cylinder is connected to the balance cylinder through a thread, and the upper magnetic steel cylinder and the lower magnetic steel cylinder are connected to the coil frame through threads respectively; a vibration damping pad is arranged between the front magnetic outer cylinder and the upper magnetic steel cylinder, and a hole retaining spring is arranged between the front magnetic outer cylinder and the lower magnetic steel cylinder; felt pads for magnetic steel shock absorption are also arranged in the upper magnetic steel cylinder and the lower magnetic steel cylinder respectively; the single-core connector 1 and the upper magnetic steel cylinder, the single-core connector 2 and the lower magnetic steel cylinder, and the single-core connector 2 and the adapter are all positioned by stoppers and hole retaining springs; the single-core connector 1 and the single-core connector 2 are both composed of a single-core male socket and a single-core female socket.

10. The rotary safety magnetic positioning logging tool according to claim 1, characterized in that: Resistance vibration damping pads are respectively arranged at both ends of the cement resistor.

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