A coiled tubing cable sealing and fixing device

Abstract

The present invention provides a continuous oil pipe cable sealing and fixing device, which comprises a cable fixing component, a mechanical release component, a connecting shell and an electrical conversion component. The cable inserted into the device is effectively compressed and fixed by the cable fixing component. At the same time, a cable sealing component is provided on the mechanical release component in one end of the connecting shell, which effectively improves the sealing of the device and prevents mud from entering. After the cable is fixed, it can be sealed at the lower end by a rubber block, so that the liquid inside the continuous oil pipe at the upper end cannot flow down, thereby achieving sealing, preventing the liquid from entering the lower end to affect the insulation, and achieving normal well logging.

Description

Technical Field

[0001] The invention relates to the technical field of petroleum well logging, in particular to a continuous oil pipe cable sealing and fixing device. Background Art

[0002] Cable logging is required in the process of oil drilling, but for highly deviated wells and horizontal wells, logging needs to be transmitted through drill pipe. The development of coiled tubing in recent years has continuously enhanced the efficiency and reliability of downhole operations. Cable logging inside coiled tubing has become the mainstream of logging.

[0003] After the coiled tubing is threaded through the cable, the instrument string at the bottom needs to be connected to the coiled tubing. Therefore, it is necessary to develop an intermediate bridge that can connect the coiled tubing and the instrument string after the cable is threaded through. The main problem at present is how to fix the cable and the coiled tubing at the end of the coiled tubing so that the liquid inside the coiled tubing does not flow to the lower end, causing insulation problems in the cable. Therefore, it is necessary to solve the problem of cable fixing and cable sealing connected to the coiled tubing to ensure the insulation requirements of normal logging.

[0004] In order to provide a coiled tubing fixing and sealing tool that can fix and seal the cable and can be released when stuck, so as to meet the needs of normal coiled tubing logging. Summary of the invention

[0005] Aiming at the problems of fixing and sealing of cables connected to coiled tubing in the prior art, the present invention provides a coiled tubing cable sealing and fixing device, which has a simple structure and is easy to use. The tool fixes the internal cable and then seals the cable through a rubber sleeve to prevent the internal liquid from entering the sealing pin, thereby preventing the liquid from affecting the insulation.

[0006] The present invention is achieved through the following technical solutions:

[0007] A coiled tubing cable sealing and fixing device comprises a cable fixing assembly, a mechanical release assembly, a connecting shell and an electrical conversion assembly; one end of the cable fixing assembly is threadedly connected in one end of the mechanical release assembly for compressing and fixing the cable; the other end of the mechanical release assembly is threadedly connected in one end of the connecting shell, and a cable sealing assembly is provided on the mechanical release assembly in one end of the connecting shell; the other end of the connecting shell is threadedly connected to the electrical conversion assembly.

[0008] Preferably, the cable fixing assembly includes an upper connector body, a positioning split screw ring, a clamp seat, a copper clamp and a compression sleeve; a protective cap is assembled on one end of the upper connector body, and the other end of the upper connector body is threadedly connected to one end of the mechanical release assembly; a through hole is provided in the clamp seat, and the clamp seat includes an assembly end, an extension end and a fixed end; the assembly end is fixed to the upper connector body in one end of the mechanical release assembly; the positioning split screw ring is sleeved on the extension end and threadedly connected to the upper connector body in one end of the mechanical release assembly; the copper clamp and the compression sleeve are assembled in the through hole of the fixed end in sequence; the compression sleeve is threadedly connected to the through hole of the fixed end, and the copper clamp is compressed.

[0009] Furthermore, the mechanical release assembly includes an upper release joint and a lower release joint; one end of the upper joint body is connected to the upper release joint through a thread, and a first O-ring is provided between the connection between the upper joint body and the upper release joint for sealing; at the same time, after the upper joint body and the upper release joint are threadedly connected in place, a plurality of top screws are provided at the connection between the upper joint body and the upper release joint to prevent the threads from loosening.

[0010] Furthermore, the lower joint of the hand-throwing device and the upper joint of the hand-throwing device are inserted into each other, and a plurality of bosses are arranged around the inner wall of the lower joint of the hand-throwing device, and a plurality of grooves are arranged around the outer wall of the upper joint of the hand-throwing device, and the plurality of bosses are correspondingly inserted into the plurality of grooves to prevent the circumferential rotation between the lower joint of the hand-throwing device and the upper joint of the hand-throwing device, and the lower joint of the hand-throwing device and the upper joint of the hand-throwing device are mutually corrected by the first O-ring and the second O-ring, and a third O-ring is arranged between the lower joint of the hand-throwing device and the upper joint of the hand-throwing device for sealing; a plurality of shear pins are also arranged between the lower joint of the hand-throwing device and the upper joint of the hand-throwing device; one end of the lower joint of the hand-throwing device is connected to the connecting shell by a thread, and the connecting portion of the lower joint of the hand-throwing device and the connecting shell A first O-ring is arranged between the joints, and after the lower connector and the connecting shell are threadedly installed in place, a plurality of top screws are arranged at the connection between the lower connector and the connecting shell to prevent the threads from loosening; a cable sealing assembly is arranged at one end of the lower connector in the connecting shell, and the cable sealing assembly comprises a rubber sleeve, a bushing and a screw ring pressure cap, and the screw ring pressure cap is connected to one end of the lower connector through threads; the rubber sleeve and the bushing are arranged between the screw ring pressure cap and the lower connector in sequence, one end of the rubber sleeve is against the lower connector, the other end of the bushing is against the screw ring pressure cap, and the rubber sleeve can be compressed by adjusting the screw ring pressure cap to achieve compression of the cable in the lower connector.

[0011] Preferably, an oil plug and a grease plug are provided on the connecting shell, and a sixth O-ring is correspondingly sleeved on the oil plug to prevent external mud from entering; a fourth O-ring is correspondingly sleeved on the grease plug; a split screw ring is also provided on the connecting shell, and a second conversion joint is sleeved on the electrical conversion assembly, the second conversion joint is threadedly connected to the connecting shell through the split screw ring, and the contact between the second conversion joint and the connecting shell is sealed by the first O-ring to prevent external mud from entering; the second conversion joint is provided with a groove at the threaded connection with the split screw ring to the end of the connecting shell, and a guide key is provided in the connecting shell, the guide key is provided in the groove in the second conversion joint, and slides during the rotation of the split screw ring, so as to limit the movement between the connecting shell and the second conversion joint; a seven-core pressure plate is provided on the connecting shell for sealing and electrical connection.

[0012] Preferably, the second conversion joint includes a single-core lower joint body, a long seven-core normal-pressure socket body is provided in the single-core lower joint body, the other end of the single-core lower joint body is equipped with a lower protective cap, and a fifth O-ring is provided between the single-core lower joint body and the lower protective cap; one end of the long seven-core normal-pressure socket body is pressed against an inner end of the single-core lower joint body through a second retaining ring, and an insulating sleeve, a spring, a conductive column, an insulating pad and a plurality of jack insulators are also provided in the long seven-core normal-pressure socket body; a through hole is provided in the insulating sleeve, the insulating pad is assembled at the end of the insulating sleeve, and the insulating pad is pressed against the long seven-core normal-pressure socket body through a third retaining ring; the conductive column sleeve is provided in the through hole, the spring is provided in the through hole, and one end is fixed to the inner wall end of the insulating sleeve through hole close to the plurality of jack insulators, and the other end is fixed to the conductive column, the plurality of jack insulators are connected to the conductive column by a wire, and the conductive column is close to the plurality of jack insulators by pressing down the compression spring.

[0013] Preferably, the seven-core pressure plate comprises a seven-core pressure plate body; a plurality of sealing needles are arranged on the seven-core pressure plate body; a plurality of sealing needles are respectively provided with plug holes and rubber sleeves; an eighth O-ring is arranged between the seven-core pressure plate body and the connecting shell for sealing, and the other end of the seven-core pressure plate is connected to the electrical conversion component.

[0014] Preferably, the cable fixing assembly includes a slip upper joint, a slip, a slip shell, a gasket and a clamping nut; a protective cap is assembled on one end of the slip upper joint, the other end of the slip upper joint is threadedly connected to one end of the slip shell, the other end of the slip shell is threadedly connected to one end of the mechanical release assembly, the slip, the gasket and the clamping nut are arranged in the slip shell, the slip is arranged on the slip upper joint for locking the cable; the clamping nut is threadedly connected to the slip upper joint, the gasket is arranged between the slip and the clamping nut, and the gasket and the clamping nut are compressed by rotating the threaded slip to achieve compression and fixation of the cable.

[0015] Preferably, the connecting shell is connected to the electrical conversion component, and a first conversion connector is mounted on the electrical conversion component; the connecting shell and one end of the first conversion connector are connected as an integral unit through a split screw ring, and a nylon protective cap is provided at the other end of the first conversion connector to protect the thread.

[0016] Furthermore, the first conversion joint includes a reducer lower joint body; a seven-core normal-pressure socket body is provided in the reducer lower joint body, a first retaining ring is provided at the inner wall of the seven-core normal-pressure socket body and the reducer lower joint body, and a socket insulator is provided in the seven-core normal-pressure socket body; a seventh O-ring is provided between the reducer lower joint body and the nylon protective cap for sealing to prevent mud from entering; and a slip ring component is provided at the end of the reducer lower joint body for electrical connection with the lower instrument; wherein the socket insulator and the slip ring component are connected by a wire.

[0017] Compared with the prior art, the present invention has the following beneficial technical effects:

[0018] The present invention provides a continuous oil pipe cable sealing and fixing device, which comprises a cable fixing component, a mechanical release component, a connecting shell and an electrical conversion component. The cable inserted into the device is effectively compressed and fixed by the cable fixing component. At the same time, a cable sealing component is provided on the mechanical release component in one end of the connecting shell, which effectively improves the sealing of the device and prevents mud from entering. After the cable is fixed, it can be sealed at the lower end by a rubber block, so that the liquid inside the continuous oil pipe at the upper end cannot flow down, thereby achieving sealing, preventing the liquid from entering the lower end to affect the insulation, and achieving normal well logging.

[0019] Furthermore, the cable fixing assembly includes an upper joint body, a positioning split screw ring, a clamp seat, a copper clamp and a compression sleeve. The cables are respectively connected to the upper joint body, the positioning split screw ring, the clamp seat, the copper clamp and the compression sleeve. The clamp seat includes an assembly end, an extension end and a fixed end. The assembly end is fixed to the upper joint body in one end of the mechanical release assembly. The positioning split screw ring is set on the extension end and is threadedly connected to the upper joint body in one end of the mechanical release assembly. The copper clamp and the compression sleeve are sequentially assembled in the through hole of the fixed end. The compression sleeve is threadedly connected to the through hole of the fixed end, and the copper clamp is compressed. The compression of the copper clamp by the compression sleeve improves the fastening of the cable.

[0020] Furthermore, the mechanical release assembly includes an upper release joint and a lower release joint; one end of the upper joint body is connected to the upper release joint by a thread, and a first O-ring is provided between the connection between the upper joint body and the upper release joint for sealing, thereby improving the sealing performance. After the upper joint body and the upper release joint are threadedly connected in place, a number of top screws are provided at the connection between the upper joint body and the upper release joint to prevent the threads from loosening. When the lower instrument is stuck, the upper release joint and the lower release joint can be separated without affecting the logging operation.

[0021] Furthermore, a cable sealing assembly is arranged in the connecting shell of the lower joint, and the cable sealing assembly includes a rubber sleeve, a bushing and a screw ring pressure cap, and the screw ring pressure cap is connected to one end of the lower joint by a thread; the rubber sleeve and the bushing are arranged between the screw ring pressure cap and the lower joint in sequence, one end of the rubber sleeve is against the lower joint, the other end is against the bushing, and the other end of the bushing is against the screw ring pressure cap. The rubber sleeve can be tightened by adjusting the screw ring pressure cap to achieve compression of the cable in the lower joint, and the rubber sleeve provides sealing for the cable in the lower joint. The liquid enters the interior of the tool from the top and reaches the position of the rubber sleeve. The internal pressure of the tool increases. When the pressure is equivalent to the external pressure, the continuous oil pipe is lifted up, and the shear pin is cut off, so that the upper joint and the lower joint are separated.

[0022] Preferably, the second conversion connector comprises a single-core lower connector body, a long seven-core normal-pressure socket body is arranged inside the single-core lower connector body, and the connection of the electrical conversion component is achieved through the long seven-core normal-pressure socket body.

[0023] Furthermore, the cable fixing assembly can also achieve compression and fixation of the cable through the cava upper connector, cava, cava shell, gasket and clamping nut. A protective cap is assembled on one end of the cava upper connector to protect the threads on the cava upper connector. The gasket and the clamping nut are tightened by rotating the threaded cava, thereby improving the clamping force on the cable.

[0024] Furthermore, the connecting shell is connected to the electrical conversion component, and a first conversion connector is mounted on the electrical conversion component; the connecting shell and one end of the first conversion connector are connected as an integral unit through a split screw ring, and a nylon protective cap is provided at the other end of the first conversion connector to protect the thread.

[0025] Furthermore, the first conversion joint includes a reducer lower joint body, in which a seven-core normal-pressure socket body is provided, and the seven-core normal-pressure socket body is electrically connected to the lower instrument, thereby improving the connectivity between the connection shell and the electrical conversion component. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure of a coiled tubing cable sealing and fixing tool device in Example 1 of the present invention;

[0027] Figure 2 This is a structural diagram of the second conversion joint in Example 1 of the present invention;

[0028] Figure 3 This is a structural diagram of a seven-core pressure plate in Example 1 of the present invention;

[0029] Figure 4 for Figure 1 Sectional view of AA in the middle;

[0030] Figure 5This is a schematic diagram of the structure of a coiled tubing cable sealing and fixing tool device in Example 2 of the present invention;

[0031] Figure 6 This is a structural diagram of the first conversion joint in Example 2 of the present invention.

[0032] In the figure: 1-upper protective cap; 2-upper connector body; 3-top screw; 4-first O-ring; 5-positioning split screw ring; 6-clamp seat; 7-copper clamp; 8-tightening plug; 9-hand-release upper connector; 10-second O-ring; 11-third O-ring; 12-hand-release lower connector; 13-rubber sleeve; 14-bushing; 15-screw ring pressure cap; 16-connecting shell; 17-fourth O-ring; 18-grease plug; 19-split screw ring; 20-guide key; 21-screw; 22-second conversion connector; 23-fifth O-ring; 24-lower protective cap; 25-seven-core pressure plate; 26-sixth O-ring; 27-oil plug; 28-shear pin; 1-1 slip upper connector; 1-2-slip; 1 -3-claw shell; 1-4-gasket; 1-5-tightening nut; 1-6-first conversion joint; 1-7-nylon protective cap; 2-1-single-core lower joint body; 2-2-second retaining ring; 2-3-long seven-core normal-pressure socket body; 2-4-jack insulator; 2-5-spring; 2-6-insulating sleeve; 2-7-conductive column; 2-8-third retaining ring; 2-9-insulating pad; 3-1-reducing lower joint body; 3-2-first retaining ring; 3-3-seven-core normal-pressure socket body; 3-4-jack insulator; 3-5-seventh O-ring; 3-6-slip ring component; 4-1-jack; 4-2-rubber sleeve; 4-3-sealing needle; 4-4-eighth O-ring; 4-5-seven-core pressure plate body. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0034] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0035] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0036] The present invention provides a continuous oil pipe cable sealing and fixing device, which has a simple structure and is easy to use. The tool fixes the internal cable and then seals the cable through a rubber sleeve to prevent the internal liquid from entering the sealing pin and avoiding the liquid from affecting the insulation.

[0037] Example 1

[0038] Specifically, according to Figure 1 As shown, the coiled tubing cable sealing and fixing device comprises a cable fixing assembly, a mechanical release assembly, a connecting shell 16 and an electrical conversion assembly; wherein the cable fixing assembly, the mechanical release assembly, the connecting shell 16 and the electrical conversion assembly are coaxially arranged; one end of the cable fixing assembly is threadedly connected in one end of the mechanical release assembly for compressing and fixing the cable; the other end of the mechanical release assembly is threadedly connected in one end of the connecting shell 16, and a cable sealing assembly is provided on the mechanical release assembly in one end of the connecting shell 16; the other end of the connecting shell 16 is threadedly connected to the electrical conversion assembly.

[0039] according to Figure 1 As shown, the cable fixing assembly includes an upper joint body 2, a positioning split screw ring 5, a clamp seat 6, a copper clamp 7 and a compression sleeve 8; one end of the upper joint body 2 is equipped with an upper protective cap 1 for protecting the thread in the upper joint body 2, and the other end of the upper joint body 2 is threadedly connected to one end of the mechanical release assembly. A through hole is provided in the clamp seat 6, and the clamp seat 6 includes an assembly end, an extension end and a fixed end. The assembly end is fixed on the upper joint body 2 in one end of the mechanical release assembly, the positioning split screw ring 5 is sleeved on the extension end, and is threadedly connected to the upper joint body 2 in one end of the mechanical release assembly, the copper clamp 7 and the compression sleeve 8 are sequentially assembled in the through hole of the fixed end, and the compression sleeve 8 is threadedly connected to the through hole of the fixed end, and the copper clamp 7 is compressed.

[0040] Specifically, the mechanical release assembly includes a release upper joint 9 and a release lower joint 12; one end of the upper joint body 2 is connected to the release upper joint 9 through a thread, and a first O-ring 4 is provided between the upper joint body 2 and the release upper joint 9 for sealing; at the same time, after the upper joint body 2 and the release upper joint 9 are threadedly connected in place, a plurality of top screws 3 are provided at the connection between the upper joint body 2 and the release upper joint 9 to prevent the threads from loosening.

[0041] Among them, the lower joint 12 of the throwing hand and the upper joint 9 of the throwing hand are inserted into each other, and a plurality of bosses are arranged around the inner wall of the lower joint 12 of the throwing hand, and a plurality of grooves are arranged around the outer wall of the upper joint 9 of the throwing hand, and a plurality of bosses are correspondingly inserted into a plurality of grooves to prevent the circumferential rotation between the lower joint 12 of the throwing hand and the upper joint 9, such as Figure 4 As shown, the lower joint 12 of the hand release and the upper joint 9 of the hand release are mutually aligned through the first O-ring 4 and the second O-ring 10, and a third O-ring 11 is arranged between the lower joint 12 of the hand release and the upper joint 9 for sealing; a plurality of shear pins 28 are also arranged between the lower joint 12 of the hand release and the upper joint 9 of the hand release, and the number of installations is determined according to the well depth requirements, and the shear pins 28 can be pulled off when separation is required. One end of the lower connector 12 is connected to the connecting shell 16 by threading, and a first O-ring 4 is arranged between the connection between the lower connector 12 and the connecting shell 16, and after the lower connector 12 and the connecting shell 16 are threadedly installed in place, a plurality of top screws 3 are arranged at the connection between the lower connector 12 and the connecting shell 16 to prevent the threads from loosening; a cable sealing assembly is arranged at one end of the lower connector 12 in the connecting shell 16, and the cable sealing assembly includes a rubber sleeve 13, a bushing 14 and a screw ring pressure cap 15, and the screw ring pressure cap 15 is connected to one end of the lower connector 12 by threading; the rubber sleeve 13 and the bushing 14 are arranged in sequence between the screw ring pressure cap 15 and the lower connector 12, one end of the rubber sleeve 13 abuts against the lower connector 12, and one end abuts against the bushing 14, and the other end of the bushing 14 abuts against the screw ring pressure cap 15, and the rubber sleeve 13 can be compressed by adjusting the screw ring pressure cap 15 to achieve compression of the cable in the lower connector 12.

[0042] An oil filling plug 27 and a grease filling plug 18 are provided on the connecting shell 16, and a sixth O-ring 26 is correspondingly sleeved on the oil filling plug 27; the oil filling plug 27 is used to observe whether the silicone grease is filled through this hole after ground grease injection, and the sixth O-ring 26 prevents external mud from entering; a fourth O-ring is correspondingly sleeved on the grease injection plug 18, and the grease injection plug 18 is opened and closed after injection when used for ground grease injection, and the fourth O-ring 17 prevents external mud from entering; a split screw ring 19 is also provided on the connecting shell 16, and a second conversion joint 22 is sleeved on the electrical conversion component, and the second conversion joint 22 is threadedly connected to the connecting shell 16 through the split screw ring 19, and the second conversion joint 2 2 is sealed at the contact point between the second conversion joint 22 and the connection housing 16 by a first O-ring to prevent external mud from entering; a groove is provided at the threaded connection point with the split screw ring 19 to the end of the connection housing 16, and a guide key 20 is provided in the connection housing 16. The guide key 20 is provided in the groove in the second conversion joint 22 and slides during the rotation of the split screw ring 19 to limit the movement between the connection housing 16 and the second conversion joint 22; a seven-core pressure plate 25 is provided on the connection housing 16 for sealing and electrical connection, wherein the seven-core pressure plate 25 is fixed to the end of the connection housing 16 by screws 21.

[0043] according to Figure 2 As shown, the second conversion joint 22 includes a single-core lower joint body 2-1, a long seven-core normal-pressure socket body 2-3 is arranged in the single-core lower joint body 2-1, the other end of the single-core lower joint body 2-1 is equipped with a lower protective cap 24, and a fifth O-ring 23 is arranged between the single-core lower joint body 2-1 and the lower protective cap 24; one end of the long seven-core normal-pressure socket body 2-3 is pressed against the inner end of the single-core lower joint body 2-1 through the second retaining ring 2-2, and an insulating sleeve 2-6, a spring 2-5, a conductive column 2-7, an insulating pad 2-9 and a plurality of jacks are also arranged in the long seven-core normal-pressure socket body 2-3. Insulator 2-4; a through hole is provided in the insulating sleeve 2-6, and an insulating pad 2-9 is assembled at the end of the insulating sleeve 2-6, and the insulating pad 2-9 is pressed against the long seven-core normal-voltage socket body 2-3 through the third retaining ring 2-8; the conductive column 2-7 is sleeved in the through hole, and the spring 2-5 is arranged in the through hole, and one end is fixed to the inner wall end of the through hole of the insulating sleeve 2-6 close to the side of the plurality of jack insulators 2-4, and the other end is fixed on the conductive column 2-7, and the plurality of jack insulators 2-4 are connected to the conductive column 2-7 by a wire, and the conductive column 2-7 is close to the plurality of jack insulators 2-4 by pressing down the compression spring 2-5.

[0044] according to Figure 3As shown, the seven-core pressure plate 25 includes a seven-core pressure plate body 4-5; a plurality of sealing needles 4-3 are arranged on the seven-core pressure plate body 4-5; a plurality of sealing needles 4-3 are respectively provided with plug holes 4-1 and rubber sleeves 4-2; an eighth O-ring 4-4 ​​is arranged between the seven-core pressure plate body 4-5 and the connecting shell 16 for sealing, and the other end of the seven-core pressure plate 25 is connected to the electrical conversion component.

[0045] The cable fixing working principle in Example 1 is as follows: Figure 1 As shown, the cable is passed through the clamp seat 6, and then the outer steel wire passes through the copper clamp 7, and the inner steel wire passes through the inside of the copper clamp 7. The outer steel wire is compressed between the copper clamp 7 and the clamp seat 6, and compressed between the copper clamp 7 and the compression plug 8, thereby fixing the cable.

[0046] Cable sealing working principle: Figure 1 As shown, the cable passes through the rubber sleeve 13, the bushing 14 and the screw ring pressure cap 15, and the screw ring pressure cap 15 is threadedly connected to the lower joint 12. When the screw ring pressure cap 15 is rotated, the bushing 14 presses down the rubber sleeve 13, so that the rubber sleeve 13 holds the cable tightly to achieve sealing.

[0047] Working principle of hand-throwing: Figure 1 As shown, the liquid enters the tool from the top and reaches the position of the rubber sleeve 13. The internal pressure of the tool increases. When it is equivalent to the external pressure, the coiled tubing is lifted up and the shear pin 28 is cut off, so that the upper joint 9 and the lower joint 12 of the release hand are separated.

[0048] Example 2

[0049] Specifically, according to Figure 5 As shown, the coiled tubing cable sealing and fixing device comprises a cable fixing assembly, a mechanical release assembly, a connecting shell 16 and an electrical conversion assembly; one end of the cable fixing assembly is threadedly connected to one end of the mechanical release assembly for compressing and fixing the cable; the other end of the mechanical release assembly is threadedly connected to one end of the connecting shell 16, and a cable sealing assembly is provided on the mechanical release assembly in one end of the connecting shell 16; the other end of the connecting shell 16 is threadedly connected to the electrical conversion assembly.

[0050] Specifically, according to Figure 5As shown, the cable fixing assembly includes a slip upper joint 1-1, a slip 1-2, a slip shell 1-3, a gasket 1-4 and a clamping nut 1-5; one end of the slip upper joint 1-1 is equipped with an upper protective cap 1, the other end of the slip upper joint 1-1 is threadedly connected to one end of the slip shell 1-3, the other end of the slip shell 1-3 is threadedly connected to one end of the mechanical release assembly, the slip 1-2, the gasket 1-4 and the clamping nut 1-5 are arranged in the slip shell 1-3, the slip 1-2 is arranged on the slip upper joint 1-1, and is used to lock the cable; the clamping nut 1-5 is threadedly connected to the slip upper joint 1-1, the gasket 1-4 is arranged between the slip 1-2 and the clamping nut 1-5, and the gasket 1-4 and the clamping nut 1-5 are compressed by rotating the threaded slip 1-2 to achieve compression and fixation of the cable.

[0051] according to Figure 5 As shown, the connecting shell 16 is connected to the electrical conversion component, and the first conversion connector 1-6 is sleeved on the electrical conversion component; the connecting shell 16 and one end of the first conversion connector 1-6 are connected as an integral unit through a split screw ring 19, and the other end of the first conversion connector 1-6 is provided with a nylon protective cap 1-7 for protecting the thread.

[0052] according to Figure 6 As shown, the first conversion joint 1-6 includes a reducer lower joint body 3-1; a seven-core normal-pressure socket body 3-3 is arranged in the reducer lower joint body 3-1, a first retaining ring 3-2 is arranged at the inner wall of the seven-core normal-pressure socket body 3-3 and the reducer lower joint body 3-1, and a socket insulator 3-4 is arranged in the seven-core normal-pressure socket body 3-3; a seventh O-ring 3-5 is arranged between the reducer lower joint body 3-1 and the nylon protective cap 1-7 for sealing to prevent mud from entering; and a slip ring component 3-6 is arranged at the end of the reducer lower joint body 3-1 for electrical connection with the lower instrument; wherein the socket insulator 3-4 and the slip ring component 3-6 are connected by a wire.

[0053] The cable fixing working principle in Example 2 is as follows: Figure 2 As shown, the cable passes through the slip 1-2, the gasket 1-4 and the clamping nut 1-5. The gasket 1-4 is pressed down by turning the clamping nut 1-5, and then the slip 1-2 is pressed. The slip 1-2 shrinks under the conical surface between the upper joints 1-1 of the slip to hold the cable tightly, thereby fixing the cable.

[0054] Cable sealing working principle: Figure 2 As shown, the cable passes through the rubber sleeve 13, the bushing 14 and the screw ring pressure cap 15, and the screw ring pressure cap 15 is threadedly connected to the lower joint 12. When the screw ring pressure cap 15 is rotated, the bushing 14 presses down the rubber sleeve 13, so that the rubber sleeve 13 holds the cable tightly to achieve sealing.

[0055] Working principle of hand-throwing: Figure 2As shown, the liquid enters the tool from the top and reaches the position of the rubber sleeve 13. The internal pressure of the tool increases. When it is equivalent to the external pressure, the coiled tubing is lifted up and the shear pin 28 is cut off, so that the upper joint 9 and the lower joint 12 of the release hand are separated.

[0056] Among them, the structure of the mechanical release assembly and the connecting shell in Example 2 is the same as that in Example 1.

[0057] The two cable fixing assemblies of Example 1 and Example 2 of the present invention are not limited to the above two methods of fixing cables. Other methods such as cone sleeves, torpedoes, etc. are all within the protection scope of fixing cables.

[0058] The working process of the present invention is as follows:

[0059] During logging operation, this tool is connected to the outer slip joint at the lower end of the coiled tubing, and then the cable is extended down, and the outer steel wire of the cable is fixed by the copper clamp 7 to achieve cable fixation. The inner steel wire of the cable is sealed by the rubber sleeve 13. The inner steel wire is cut at the screw ring pressure cap 15 to expose the cable wire, and the cable wire is connected to the sealing pin 4-3 of the 7-core pressure plate 25 at the lower end to achieve electrical connection.

[0060] During logging, this tool is connected to the external slip joint at the lower end of the coiled tubing, and then the cable is extended down and held tight by slips 1-2 to fix the cable. The lower end of the cable is sealed by a rubber sleeve 13. All the steel wires of the cable are cut off at the screw ring pressure cap 15 to expose the cable line, and the cable line is connected to the sealing pin 4-3 of the 7-core pressure plate 25 at the lower end to achieve electrical connection.

[0061] During logging operation, if the lower instrument is stuck, liquid can be injected into the tool from the upper coiled tubing to the position of the rubber sleeve 13. The internal pressure of the tool increases. When it is equivalent to the external pressure, the coiled tubing is pulled up to cut off the shear pin 28, so that the upper joint 9 and the lower joint 12 of the release hand are separated, and the release operation is realized.

[0062] After the continuous tubing is threaded with the cable, the instrument string at the bottom needs to be connected to the continuous tubing. The continuous tubing cable sealing and fixing device provided by the present invention can connect the continuous tubing and the instrument string after the cable is threaded. The cable at the upper end is first fixed by the fixing device inside the tool. The fixing device has two types of fixings, namely, the slip method and the copper clamp, but is not limited to these two types of fixings. After the cable is fixed, it can be sealed at the lower end by a rubber block, so that the liquid inside the upper continuous tubing cannot flow down, thereby achieving sealing, preventing the liquid from entering the lower end to affect the insulation, and achieving normal logging.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A device for sealing and fixing a coiled tubing cable, characterized in that: It comprises a cable fixing component, a mechanical release component, a connecting shell (16) and an electrical conversion component; one end of the cable fixing component is threadedly connected to one end of the mechanical release component for compressing and fixing the cable; the other end of the mechanical release component is threadedly connected to one end of the connecting shell (16), and a cable sealing component is provided on the mechanical release component in one end of the connecting shell (16); the other end of the connecting shell (16) is threadedly connected to the electrical conversion component; The cable fixing assembly comprises an upper connector body (2), a positioning split screw ring (5), a clamp seat (6), a copper clamp (7) and a compression sleeve (8); an upper protective cap (1) is assembled on one end of the upper connector body (2), and the other end of the upper connector body (2) is threadedly connected to one end of the mechanical release assembly; a through hole is arranged in the clamp seat (6); the clamp seat (6) comprises an assembly end, an extension end and a fixed end; the assembly end is fixed on the upper connector body (2) in one end of the mechanical release assembly; the positioning split screw ring (5) is sleeved on the extension end and threadedly connected to the upper connector body (2) in one end of the mechanical release assembly; the copper clamp (7) and the compression sleeve (8) are assembled in turn in the through hole of the fixed end; the compression sleeve (8) is threadedly connected to the through hole of the fixed end and is arranged to compress the copper clamp (7); The mechanical release assembly comprises a release upper joint (9) and a release lower joint (12); one end of the upper joint body (2) is connected to the release upper joint (9) by means of a thread, and a first O-ring (4) is provided between the connection between the upper joint body (2) and the release upper joint (9) for sealing; at the same time, after the upper joint body (2) and the release upper joint (9) are threadedly connected in place, a plurality of jack screws (3) are provided at the connection between the upper joint body (2) and the release upper joint (9) to prevent the threads from loosening; The lower hand-release joint (12) and the upper hand-release joint (9) are arranged to be plugged into each other, and a plurality of bosses are arranged around the inner wall of the lower hand-release joint (12), and a plurality of grooves are arranged around the outer wall of the upper hand-release joint (9), and the plurality of bosses are correspondingly inserted into the plurality of grooves to prevent the lower hand-release joint (12) and the upper hand-release joint (9) from rotating in the circumferential direction, and the lower hand-release joint (12) and the upper hand-release joint (9) are mutually aligned through a first O-ring (4) and a second O-ring (10), and a third O-ring (11) is arranged between the lower hand-release joint (12) and the upper hand-release joint (9) for sealing; a plurality of shear pins (28) are also arranged between the lower hand-release joint (12) and the upper hand-release joint (9); one end of the lower hand-release joint (12) is connected to the connecting shell (16) through a thread, and a first O-ring (4) is arranged between the connecting portion of the lower hand-release joint (12) and the connecting shell (16), and After the lower connector (12) and the connecting shell (16) are threadedly installed in place, a plurality of top screws (3) are arranged at the connection between the lower connector (12) and the connecting shell (16) to prevent the threads from loosening; a cable sealing assembly is arranged at one end of the lower connector (12) in the connecting shell (16), the cable sealing assembly comprising a rubber sleeve (13), a bushing (14) and a screw ring pressure cap (15), the screw ring pressure cap (15) being connected to one end of the lower connector (12) by means of threads; the rubber sleeve (13) and the bushing (14) are arranged in sequence between the screw ring pressure cap (15) and the lower connector (12), one end of the rubber sleeve (13) abuts against the lower connector (12), the other end of the rubber sleeve (13) abuts against the bushing (14), the other end of the bushing (14) abuts against the screw ring pressure cap (15), the rubber sleeve (13) can be compressed by adjusting the screw ring pressure cap (15), and the cable in the lower connector (12) can be compressed.

2. The device for sealing and fixing a coiled tubing cable according to claim 1, characterized in that: The connecting housing (16) is provided with an oil filling plug (27) and a grease filling plug (18), and a sixth O-ring (26) is correspondingly sleeved on the oil filling plug (27) to prevent external mud from entering; a fourth O-ring (17) is correspondingly sleeved on the grease filling plug (18); a split screw ring (19) is also provided on the connecting housing (16), and a second conversion joint (22) is sleeved on the electrical conversion component, and the second conversion joint (22) is threadedly connected to the connecting housing (16) through the split screw ring (19), and the contact between the second conversion joint (22) and the connecting housing (16) is through the first An O-ring (4) is used for sealing to prevent external mud from entering; the second conversion joint (22) is provided with a groove at the end of the connection shell (16) from the threaded connection with the split screw ring (19), and a guide key (20) is provided in the connection shell (16). The guide key (20) is provided in the groove in the second conversion joint (22) and is used to limit the movement between the connection shell (16) and the second conversion joint (22) by sliding during the rotation of the split screw ring (19); a seven-core pressure plate (25) is provided on the connection shell (16) for sealing and electrical connection.

3. The device for sealing and fixing a coiled tubing cable according to claim 2, characterized in that: The second conversion joint (22) comprises a single-core lower joint body (2-1), a long seven-core normal-pressure socket body (2-3) is arranged inside the single-core lower joint body (2-1), a lower protective cap (24) is assembled on the other end of the single-core lower joint body (2-1), and a fifth O-ring (23) is arranged between the single-core lower joint body (2-1) and the lower protective cap (24); one end of the long seven-core normal-pressure socket body (2-3) is pressed against an inner end of the single-core lower joint body (2-1) through a second retaining ring (2-2), and an insulating sleeve (2-6), a spring (2-5), a conductive column (2-7), an insulating pad (2-9) and a plurality of jacks are also arranged inside the long seven-core normal-pressure socket body (2-3). An insulator (2-4); a through hole is provided in the insulating sleeve (2-6); an insulating pad (2-9) is assembled at the end of the insulating sleeve (2-6); the insulating pad (2-9) is pressed against the inside of the long seven-core normal-voltage socket body (2-3) through a third retaining ring (2-8); a conductive column (2-7) is sleeved in the through hole; a spring (2-5) is arranged in the through hole, and one end of the spring is fixed to the inner wall end of the through hole of the insulating sleeve (2-6) close to the plurality of jack insulators (2-4), and the other end is fixed to the conductive column (2-7); the plurality of jack insulators (2-4) are connected to the conductive column (2-7) through a wire; the conductive column (2-7) is close to the plurality of jack insulators (2-4) by pressing down the compression spring (2-5).

4. The device for sealing and fixing a coiled tubing cable according to claim 2, characterized in that: The seven-core pressure plate (25) comprises a seven-core pressure plate body (4-5); a plurality of sealing needles (4-3) are provided on the seven-core pressure plate body (4-5); a plug hole (4-1) and a rubber sleeve (4-2) are respectively provided on the plurality of sealing needles (4-3); an eighth O-ring (4-4) is provided between the seven-core pressure plate body (4-5) and the connecting shell (16) for sealing; and the other end of the seven-core pressure plate (25) is connected to an electrical conversion component.

5. The device for sealing and fixing a coiled tubing cable according to claim 1, characterized in that: The cable fixing assembly comprises a slip upper joint (1-1), a slip (1-2), a slip shell (1-3), a gasket (1-4) and a compression nut (1-5); one end of the slip upper joint (1-1) is equipped with an upper protective cap (1), the other end of the slip upper joint (1-1) is threadedly connected to one end of the slip shell (1-3), the other end of the slip shell (1-3) is threadedly connected to one end of the mechanical release assembly, the slip (1-2), the gasket (1-4) ) and a compression nut (1-5) are arranged in a slip housing (1-3); the slip (1-2) is arranged on the slip upper joint (1-1) and is used to lock the cable; the compression nut (1-5) is connected to the slip upper joint (1-1) by threading; the gasket (1-4) is arranged between the slip (1-2) and the compression nut (1-5); the gasket (1-4) and the compression nut (1-5) are compressed by rotating the slip (1-2) to achieve compression and fixation of the cable.

6. The device for sealing and fixing a coiled tubing cable according to claim 1, characterized in that: The connection housing (16) is connected to the electrical conversion component, and a first conversion connector (1-6) is sleeved on the electrical conversion component; the connection housing (16) and one end of the first conversion connector (1-6) are connected as an integral unit via a split screw ring (19), and the other end of the first conversion connector (1-6) is provided with a nylon protective cap (1-7) for protecting the thread.

7. The device for sealing and fixing a coiled tubing cable according to claim 6, characterized in that: The first conversion joint (1-6) comprises a reducer lower joint body (3-1); a seven-core normal-pressure socket body (3-3) is arranged inside the reducer lower joint body (3-1); a first retaining ring (3-2) is arranged at the inner wall of the seven-core normal-pressure socket body (3-3) and the reducer lower joint body (3-1); a socket insulator (3-4) is arranged inside the seven-core normal-pressure socket body (3-3); a seventh O-ring (3-5) is arranged between the reducer lower joint body (3-1) and the nylon protective cap (1-7) for sealing and preventing mud from entering; and a slip ring component (3-6) is arranged at the end of the reducer lower joint body (3-1) for electrical connection with a lower instrument; wherein the socket insulator (3-4) and the slip ring component (3-6) are connected via a wire.

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