CN113846979A

CN113846979A - Cable sealing and fixing device for continuous oil pipe

Info

Publication number: CN113846979A
Application number: CN202111130338.5A
Authority: CN
Inventors: 刘九州; 孙耀龙; 徐军明; 卢亚刚; 王坤
Original assignee: Xi'an Dianthus Energy Technology Co ltd
Current assignee: Xi'an Dianthus Energy Technology Co ltd
Priority date: 2021-09-26
Filing date: 2021-09-26
Publication date: 2021-12-28

Abstract

The invention provides a coiled tubing cable sealing and fixing device which comprises a cable fixing component, a mechanical releasing component, a connecting shell and an electrical conversion component, wherein a cable penetrating into the device is effectively compressed and fixed through the cable fixing component, meanwhile, the cable sealing component is arranged on the mechanical releasing component in one end of the connecting shell, the sealing of the device is effectively improved, slurry is prevented from entering, the lower end of the device can be sealed through a rubber block after the cable is fixed, so that liquid in the coiled tubing at the upper end cannot flow down, the sealing is realized, the liquid is prevented from entering the lower end to influence the insulation, and the normal well logging is realized.

Description

Cable sealing and fixing device for continuous oil pipe

Technical Field

The invention relates to the technical field of petroleum logging, in particular to a cable sealing and fixing device for a continuous oil pipe.

Background

Wireline logging is required during oil drilling, but for highly deviated and horizontal wells, logging is required to be conveyed through a drill pipe. In recent years, the development of coiled tubing makes the efficiency and reliability of downhole operation construction continuously enhanced. Logging by penetrating a cable inside a coiled tubing becomes a mainstream logging.

After the coiled tubing is threaded through the cable, the instrument string at the lower part needs to be connected with the coiled tubing, so that an intermediate bridge needs to be developed, and the coiled tubing threaded through the cable can be connected with the instrument string. At present, the main problem is how to fix the cable and the coiled tubing at the tail end of the coiled tubing so that liquid in the coiled tubing cannot flow to the lower end to cause insulation in the cable, and therefore the problems of cable fixation and cable sealing connected with the coiled tubing need to be solved, and the insulation requirement of normal logging is guaranteed.

The coiled tubing fixing and sealing tool can fix and seal a cable and can be released after the cable is stuck, and the requirement of normal coiled tubing logging is met.

Disclosure of Invention

The invention provides a cable sealing and fixing device for a continuous oil pipe, aiming at the problems of fixing and cable sealing of a cable connected with the continuous oil pipe in the prior art, the cable sealing and fixing device is simple in structure and convenient to use, the tool fixes the cable inside, and then seals the cable through a rubber sleeve, so that liquid inside is prevented from entering a sealing contact pin, and insulation is prevented from being influenced by the liquid.

The invention is realized by the following technical scheme:

a coiled tubing cable sealing and fixing device comprises a cable fixing component, a mechanical releasing component, a connecting shell and an electrical conversion component; one end of the cable fixing component is in threaded connection with one end of the mechanical releasing component and is used for compressing and fixing the cable; the other end of the mechanical releasing assembly is in threaded connection with one end of the connecting shell, and a cable sealing assembly is arranged on the mechanical releasing assembly in one end of the connecting shell; the other end of the connecting shell is in threaded connection with the electrical conversion assembly.

Preferably, the cable fixing assembly comprises an upper connector body, a positioning split spiral ring, a clamp seat, a copper clamp and a pressing sleeve; protective cap on the one end assembly of top connection body, the other end threaded connection of top connection body is in the one end of mechanical releasing subassembly, be equipped with the through-hole in the clamp seat, the clamp seat is including the assembly end, extension end and stiff end, the assembly end is fixed on the top connection body in the one end of mechanical releasing subassembly, the location is to opening the spiro union cover and being served in the extension, and threaded connection is on the top connection body in the one end of mechanical releasing subassembly, the copper clamp with compress tightly the cover and assemble in the through-hole of stiff end in proper order, compress tightly the cover through threaded connection in the through-hole of stiff end, and compress tightly the setting to the copper clamp.

Further, the mechanical releasing assembly comprises a releasing upper joint and a releasing lower joint; one end of the upper joint body is connected in the releasing upper joint through threads, and a first O-shaped ring is arranged between the upper joint body and the releasing upper joint for sealing; meanwhile, after the upper joint body and the releasing upper joint are in threaded connection in place, a plurality of jackscrews are arranged at the connection part of the upper joint body and the releasing upper joint and used for preventing the threads from loosening.

Furthermore, the lower lost joint and the upper releasing joint are arranged in an opposite insertion manner, a plurality of bosses are arranged on the inner wall of the lower releasing joint in an encircling manner, a plurality of grooves are arranged on the outer wall of the upper releasing joint in an encircling manner, the plurality of bosses are correspondingly inserted into the plurality of grooves and used for preventing circumferential rotation between the lower lost joint and the upper releasing joint, the lower releasing joint and the upper releasing joint are mutually righted through a first O-shaped ring and a second O-shaped ring, and a third O-shaped ring is arranged between the lower lost joint and the upper releasing joint for sealing; a plurality of shearing pins are arranged between the lower lost-hand joint and the upper releasing joint; one end of the lower releasing sub-connector is connected in the connecting shell through threads, a first O-shaped ring is arranged between the lower releasing sub-connector and the connecting shell, and a plurality of jackscrews are arranged at the connecting part of the lower releasing sub-connector and the connecting shell after the lower releasing sub-connector and the connecting shell are installed in place through threads, so that the threads are prevented from being loosened; a cable sealing assembly is arranged at one end of the lower lost-hand joint in the connecting shell, the cable sealing assembly comprises a rubber sleeve, a bushing and a spiral ring pressing cap, and the spiral ring pressing cap is connected to one end of the lower lost-hand joint through threads; the rubber sleeve and the bushing are sequentially arranged between the spiral ring pressing cap and the hand lower joint, one end of the rubber sleeve abuts against the bushing, the other end of the bushing abuts against the spiral ring pressing cap, the rubber sleeve can be compressed by adjusting the spiral ring pressing cap, and the cable in the hand lower joint is compressed.

Preferably, an oil filling plug and a grease filling plug are arranged on the connecting shell, and a sixth O-shaped ring is correspondingly sleeved on the oil filling plug; prevent external mud from entering; a fourth O-shaped ring is correspondingly sleeved on the grease injection plug; the connecting shell is also provided with a split spiral ring, the electric conversion assembly is sleeved with a second adapter, the second adapter is in threaded connection with the connecting shell through the split spiral ring, and the contact position between the second adapter and the connecting shell is sealed through a first O-shaped ring so as to prevent external slurry from entering; the second adapter is provided with a groove at the end part from the threaded connection part of the split spiral ring to the connecting shell, and a guide key is arranged in the connecting shell and is arranged in the groove in the second adapter and slides in the rotating process of the split spiral ring to limit the movement between the connecting shell and the second adapter; a seven-core pressure bearing disc is arranged on the connecting shell and used for sealing and electrical connection.

Preferably, the second adapter comprises a single-core lower adapter body, a long seven-core normal-pressure socket body is arranged in the single-core lower adapter body, a lower protective cap is assembled at the other end of the single-core lower adapter body, and a fifth O-shaped ring is arranged between the single-core lower adapter body and the lower protective cap; one end of the long seven-core normal-pressure socket body is abutted against one end of the inner side of the single-core lower connector body through a second check ring, and an insulating sleeve, a spring, a conductive column, an insulating pad and a plurality of jack insulators are further arranged in the long seven-core normal-pressure socket body; a through hole is formed in the insulating sleeve, the insulating pad is assembled at the end part of the insulating sleeve, and the insulating pad is propped against the inside of the long seven-core normal-pressure socket body through a third check ring; it establishes in the through-hole to lead the electrical pillar cover, and the spring setting is in the through-hole, and one end is fixed and is close to the inner wall end of a plurality of jack insulator sides at insulating cover through-hole, and the other end is fixed and is led electrical pillar, and a plurality of jack insulators with lead electrical pillar and pass through the wire and be connected, lead electrical pillar and be close to a plurality of jack insulators through pushing down compression spring.

Preferably still further, the seven-core pressure bearing disc comprises a seven-core pressure bearing disc body; the seven-core pressure bearing disc body is provided with a plurality of sealing needles; the plurality of sealing needles are respectively provided with a jack and a rubber sleeve; an eighth O-shaped ring is arranged between the seven-core pressure bearing disc body and the connecting shell and used for sealing, and the other end of the seven-core pressure bearing disc is connected with the electrical conversion assembly.

Preferably, the cable fixing assembly comprises a slip upper joint, slips, a slip shell, a backing ring and a compression nut; one end of the slip upper joint is provided with an upper protective cap, the other end of the slip upper joint is in threaded connection with one end of a slip shell, the other end of the slip shell is in threaded connection with one end of the mechanical releasing assembly, a slip, a backing ring and a compression nut are arranged in the slip shell, and the slip is arranged on the slip upper joint and used for locking a cable; the gland nut is connected to the joint on the slip through threads, the backing ring is arranged between the slip and the gland nut, the backing ring and the gland nut are compressed tightly by rotating the threaded slip, and the cable is compressed and fixed.

Preferably, the connecting shell is connected with the electrical conversion assembly, and the electrical conversion assembly is sleeved with the first adapter; the connecting shell is connected with one end of the first adapter through the split spiral ring to form a whole, and the other end of the first adapter is provided with a nylon protective cap for protecting threads.

Further, the first conversion joint comprises a reducing lower joint body; a seven-core normal-pressure socket body is arranged in the reducing lower joint body, a first check ring is arranged on the inner walls of the seven-core normal-pressure socket body and the reducing lower joint body, and a jack insulator is arranged in the seven-core normal-pressure socket body; a seventh O-shaped ring is arranged between the reducing lower joint body and the nylon protective cap and used for sealing and preventing slurry from entering; a slip ring component is arranged at the end part of the reducing lower connector body and is used for being electrically connected with a lower instrument; wherein, the jack insulator is connected with the slip ring component through a lead.

Compared with the prior art, the invention has the following beneficial technical effects:

Further, the cable fixing component comprises an upper connector body, the positioning split spiral ring, a clamp seat, a copper clamp and a pressing sleeve, the cable is respectively arranged on the upper connector body, the positioning split spiral ring, the clamp seat, the copper clamp and the pressing sleeve, the clamp seat comprises an assembling end, an extending end and a fixed end, the assembling end is fixed on the upper connector body in one end of the mechanical releasing component, the positioning split spiral ring is sleeved on the extending end, the copper clamp and the pressing sleeve are sequentially assembled in the through hole of the fixed end, the pressing sleeve is connected in the through hole of the fixed end through threads, the copper clamp is pressed and arranged, the copper clamp is pressed through the pressing sleeve, and fastening of the cable is improved.

Furthermore, the mechanical releasing assembly comprises a releasing upper joint and a releasing lower joint; threaded connection is passed through in the top connection of giving up the top connection body, and sets up first O shape circle between the connection of top connection body and giving up the top connection and seal, has improved the leakproofness, sets up a plurality of jackscrews in the junction of top connection body and giving up the top connection after top connection body and giving up the top connection threaded connection target in place for prevent the screw thread pine mouth, when lower instrument meets the card, give up the top connection and give up the bottom connection separable do not influence the well logging and make the page or leaf.

Furthermore, a cable sealing assembly is arranged in the connecting shell of the lost hand lower joint and comprises a rubber sleeve, a lining and a spiral ring pressing cap, and the spiral ring pressing cap is connected to one end of the lost hand lower joint through threads; the rubber sleeve and the bushing are sequentially arranged between the spiral ring pressing cap and the lower hand joint, one end of the rubber sleeve abuts against the bushing, the other end of the bushing abuts against the spiral ring pressing cap, the rubber sleeve can be pressed by adjusting the spiral ring pressing cap, the cable in the lower hand joint is pressed, the rubber sleeve provides cable tightness in the lower hand joint, liquid enters the inside of the tool from the upper portion and reaches the position of the rubber sleeve, the pressure in the tool rises, when the external pressure is equal to that of lifting the coiled tubing, the shearing pin is cut off, and the upper joint of the release is separated from the lower joint of the release.

Preferably further, the second adapter comprises a single-core lower adapter body, a long seven-core normal-pressure socket body is arranged in the single-core lower adapter body, and the connection of the electrical conversion assembly is realized through the long seven-core normal-pressure socket body.

Furthermore, the cable fixing assembly can further compress and fix the cable through the slip upper joint, the slip shell, the backing ring and the compression nut, the protective cap is assembled at one end of the slip upper joint and used for protecting threads on the slip upper joint, the backing ring and the compression nut are compressed tightly by rotating the threaded slip, and pressing force on the cable is improved.

Furthermore, the connecting shell is connected with the electrical conversion assembly, and the electrical conversion assembly is sleeved with a first conversion connector; the connecting shell is connected with one end of the first adapter through the split spiral ring to form a whole, and the other end of the first adapter is provided with a nylon protective cap for protecting threads.

Furthermore, the first conversion joint comprises a reducing lower joint body, a seven-core normal-pressure socket body is arranged in the reducing lower joint body, and the connecting shell is electrically connected with the lower instrument through the seven-core normal-pressure socket body, so that the connectivity between the connecting shell and the electrical conversion assembly is improved.

Drawings

FIG. 1 is a schematic structural view of a coiled tubing cable sealing and securing tool apparatus according to example 1 of the present invention;

FIG. 2 is a structural view of a second adapter in embodiment 1 of the present invention;

fig. 3 is a structural view of a seven-core pressure bearing disk in embodiment 1 of the present invention;

FIG. 4 is a cross-sectional view A-A of FIG. 1;

FIG. 5 is a schematic structural view of a coiled tubing cable sealing and securing tool apparatus according to embodiment 2 of the present invention;

fig. 6 is a first conversion joint structure diagram in embodiment 2 of the present invention.

In the figure: 1-upper protective cap; 2-upper joint body; 3-top thread; 4-a first O-ring; 5-positioning split spiro ring; 6-clamp seat; 7-copper clamp; 8-a compression plug; 9-releasing the upper joint; 10-a second O-ring; 11-a third O-ring; 12-losing the lower hand joint; 13-rubber sleeve; 14-a bushing; 15-a spiral ring press cap; 16-a connection housing; 17-a fourth O-ring; 18-pour the fat stopper; 19-a bisected spiro ring; 20-a guide key; 21-a screw; 22-a second crossover joint; 23-a fifth O-ring; 24-lower protective cap; 25-seven core bearing discs; 26-a sixth O-ring; 27-a filler plug; 28-shear pins; 1-1, an upper joint of a slip; 1-2-slips; 1-3-slip housing; 1-4-backing ring; 1-5-compression nut; 1-6-a first crossover joint; 1-7-nylon protective cap; 2-1-single core lower joint body; 2-2-a second retainer ring; 2-3-a long seven-core normal pressure socket body; 2-4-jack insulators; 2-5-spring; 2-6-insulating sleeve; 2-7-conductive pillars; 2-8-a third retainer ring; 2-9-insulating pad; 3-1-reducing lower joint body; 3-2-a first retaining ring; 3-3-seven-core normal pressure socket body; 3-4-a jack insulator; 3-5-seventh O-ring; 3-6-slip ring component; 4-1-jack; 4-2-glue cover; 4-3-sealing the needle; 4-4-eighth O-ring; 4-5-seven cores bearing plate body.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The invention is described in further detail below with reference to the accompanying drawings:

the invention provides a cable sealing and fixing device for a continuous oil pipe, which is simple in structure and convenient to use.

Example 1

Specifically, as shown in fig. 1, the coiled tubing cable sealing and securing device includes a cable securing assembly, a mechanical releasing assembly, a connecting housing 16, and an electrical conversion assembly; the cable fixing component, the mechanical releasing component, the connecting shell 16 and the electrical conversion component are coaxially arranged; one end of the cable fixing component is in threaded connection with one end of the mechanical releasing component and is used for compressing and fixing the cable; the other end of the mechanical releasing assembly is in threaded connection with one end of the connecting shell 16, and a cable sealing assembly is arranged on the mechanical releasing assembly in one end of the connecting shell 16; the other end of the connection housing 16 is screwed to the electrical conversion assembly.

According to fig. 1, the cable fixing assembly comprises an upper joint body 2, a positioning split spiral ring 5, a clamp seat 6, a copper clamp 7 and a pressing sleeve 8; protective cap 1 is assembled to the one end of top connection body 2, a screw thread for in the protection top connection body 2, the other end threaded connection of top connection body 2 is in the one end of mechanical releasing subassembly, be equipped with the through-hole in the clamp seat 6, clamp seat 6 includes the assembly end, extension end and stiff end, the assembly end is fixed on top connection body 2 in the one end of mechanical releasing subassembly, the location is to split 5 covers of spiral ring and is established on the extension end, and threaded connection is on top connection body 2 in the one end of mechanical releasing subassembly, copper ferrule 7 assembles in the through-hole of stiff end with compressing tightly cover 8 in proper order, compress tightly cover 8 in the through-hole of stiff end through threaded connection, and compress tightly the setting to copper ferrule 7.

Specifically, the mechanical releasing assembly comprises a releasing upper joint 9 and a releasing lower joint 12; one end of the upper joint body 2 is connected in the releasing upper joint 9 through threads, and a first O-shaped ring 4 is arranged between the upper joint body 2 and the releasing upper joint 9 for sealing; meanwhile, after the upper joint body 2 and the releasing upper joint 9 are in threaded connection in place, a plurality of jackscrews 3 are arranged at the joint of the upper joint body 2 and the releasing upper joint 9 and used for preventing the threads from loosening.

The lower releasing joint 12 and the upper releasing joint 9 are arranged in an opposite insertion mode, a plurality of bosses are arranged on the inner wall of the lower releasing joint 12 in an encircling mode, a plurality of grooves are arranged on the outer wall of the upper releasing joint 9 in an encircling mode, the bosses are correspondingly inserted into the grooves and used for preventing circumferential rotation between the lower releasing joint 12 and the upper releasing joint 9, as shown in fig. 4, the lower releasing joint 12 and the upper releasing joint 9 are mutually righted through a first O-shaped ring 4 and a second O-shaped ring 10, and a third O-shaped ring 11 is arranged between the lower releasing joint 12 and the upper releasing joint 9 for sealing; a plurality of shear pins 28 are further arranged between the lower lost-hand joint 12 and the upper releasing joint 9, the installation quantity is determined according to the well depth, and the shear pins 28 can be broken when separation is needed. One end of the lost lower joint 12 is connected in the connecting shell 16 through threads, a first O-shaped ring 4 is arranged between the joint of the lost lower joint 12 and the connecting shell 16, and a plurality of jackscrews 3 are arranged at the joint of the lost lower joint 12 and the connecting shell 16 after the lost lower joint 12 and the connecting shell 16 are installed in place through threads to prevent the threads from being loosened; arranging a cable sealing assembly at one end of the lower dead hand joint 12 in the connecting shell 16, wherein the cable sealing assembly comprises a rubber sleeve 13, a bushing 14 and a spiral ring pressing cap 15, and the spiral ring pressing cap 15 is connected to one end of the lower dead hand joint 12 through threads; the rubber sleeve 13 and the bush 14 are sequentially arranged between the spiral ring pressing cap 15 and the hand lower joint 12, one end of the rubber sleeve 13 abuts against the hand lower joint 12, the other end of the bush 14 abuts against the spiral ring pressing cap 15, the rubber sleeve 13 can be pressed by adjusting the spiral ring pressing cap 15, and the cable in the hand lower joint 12 is pressed.

An oil filling plug 27 and a grease filling plug 18 are arranged on the connecting shell 16, and a sixth O-shaped ring 26 is correspondingly sleeved on the oil filling plug 27; the oil filling plug 27 is used for observing whether the silicone grease is filled through the hole after the grease is filled on the ground, and the sixth O-shaped ring 26 is used for preventing external slurry from entering; a fourth O-shaped ring is correspondingly sleeved on the grease injection plug 18, the grease injection plug 18 is opened and closed after being injected when the grease is injected on the ground, and the fourth O-shaped ring 17 prevents external slurry from entering; a split screw ring 19 is further arranged on the connecting shell 16, a second adapter 22 is sleeved on the electrical conversion assembly, the second adapter 22 is in threaded connection with the connecting shell 16 through the split screw ring 19, and the contact position between the second adapter 22 and the connecting shell 16 is sealed through a first O-shaped ring, so that external slurry is prevented from entering; the second adapter 22 is provided with a groove at the end of the connection housing 16 where the split thread ring 19 is screwed, a guide key 20 is provided in the connection housing 16, the guide key 20 is provided in the groove in the second adapter 22 and slides during the rotation of the split thread ring 19 for limiting the movement between the connection housing 16 and the second adapter 22; a seven-core pressure-bearing disk 25 is provided on the connection housing 16 for sealing and electrical connection, wherein the seven-core pressure-bearing disk 25 is fixed to the end of the connection housing 16 by means of screws 21.

According to fig. 2, the second adapter 22 comprises a single-core lower adapter body 2-1, a long seven-core normal pressure socket body 2-3 is arranged in the single-core lower adapter body 2-1, a lower protective cap 24 is assembled at the other end of the single-core lower adapter body 2-1, and a fifth O-ring 23 is arranged between the single-core lower adapter body 2-1 and the lower protective cap 24; one end of a long seven-core normal-pressure socket body 2-3 is abutted against one end of the inner side of the single-core lower connector body 2-1 through a second check 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 jack insulators 2-4 are further arranged in the long seven-core normal-pressure socket body 2-3; a through hole is formed in the insulating sleeve 2-6, the insulating pad 2-9 is assembled at the end part of the insulating sleeve 2-6, and the insulating pad 2-9 is propped against the long seven-core normal-pressure socket body 2-3 through a third retainer ring 2-8; the conducting column 2-7 is sleeved in the through hole, the spring 2-5 is arranged in the through hole, one end of the spring is fixed to the inner wall end of the insulating sleeve 2-6, close to the side of the plurality of jack insulators 2-4, the other end of the spring is fixed to the conducting column 2-7, the plurality of jack insulators 2-4 are connected with the conducting column 2-7 through a conducting wire, and the conducting column 2-7 is close to the plurality of jack insulators 2-4 through the compression spring 2-5 which is pressed downwards.

As shown in fig. 3, the seven-core pressure bearing disk 25 includes seven-core pressure bearing disk bodies 4-5; a plurality of sealing needles 4-3 are arranged on the seven-core pressure bearing disc body 4-5; the plurality of sealing needles 4-3 are respectively provided with a jack 4-1 and a rubber sleeve 4-2; an eighth O-shaped ring 4-4 is arranged between the seven-core pressure bearing disc body 4-5 and the connecting shell 16 for sealing, and the other end of the seven-core pressure bearing disc 25 is connected with an electrical conversion assembly.

Wherein, the fixed theory of operation of cable in embodiment 1: as shown in fig. 1, the cable is passed through the ferrule holder 6, and then the outer layer wire is passed through the brass band 7 and the inner layer wire is passed through the inside of the brass band 7. The outer layer steel wire is compressed between the copper clamp 7 and the clamp seat 6 and between the copper clamp 7 and the compression plug 8, so that the cable is fixed.

The working principle of cable sealing is as follows: as shown in figure 1, the cable passes through the rubber sleeve 13, the bushing 14 and the spiral ring pressing cap 15, the spiral ring pressing cap 15 is in threaded connection with the lower releasing connector 12, and the bushing 14 presses the rubber sleeve 13 downwards when the spiral ring pressing cap 15 is rotated, so that the rubber sleeve 13 holds the cable tightly to realize sealing.

The releasing working principle is as follows: as shown in figure 1, liquid enters the inside of the tool from the upper part and reaches the position of the rubber sleeve 13, the pressure in the tool is increased, when the pressure corresponds to the external pressure, the coiled tubing is lifted, the shearing pin 28 is sheared, and the upper releasing sub 9 is separated from the lower releasing sub 12.

Example 2

Specifically, as shown in fig. 5, the coiled tubing cable sealing and securing apparatus includes a cable securing assembly, a mechanical releasing assembly, a connection housing 16, and an electrical conversion assembly; one end of the cable fixing component is in threaded connection with one end of the mechanical releasing component and is used for compressing and fixing the cable; the other end of the mechanical releasing assembly is in threaded connection with one end of the connecting shell 16, and a cable sealing assembly is arranged on the mechanical releasing assembly in one end of the connecting shell 16; the other end of the connection housing 16 is screwed to the electrical conversion assembly.

Specifically, as shown in fig. 5, the cable fixing assembly comprises a slip upper joint 1-1, a slip 1-2, a slip shell 1-3, a backing ring 1-4 and a compression nut 1-5; one end of a slip upper joint 1-1 is provided with an upper protective cap 1, the other end of the slip upper joint 1-1 is in threaded connection with one end of a slip shell 1-3, the other end of the slip shell 1-3 is in threaded connection with one end of a mechanical releasing assembly, a slip 1-2, a backing ring 1-4 and a compression nut 1-5 are arranged in the slip shell 1-3, and the slip 1-2 is arranged on the slip upper joint 1-1 and used for locking a cable; the compression nut 1-5 is connected to the slip upper connector 1-1 through threads, the backing ring 1-4 is arranged between the slip 1-2 and the compression nut 1-5, and the backing ring 1-4 and the compression nut 1-5 are compressed by rotating the threaded slip 1-2, so that the cable is compressed and fixed.

Referring to fig. 5, the connection housing 16 is connected to the electrical conversion assembly, and the electrical conversion assembly is sleeved with the first adaptor 1-6; the connecting shell 16 is connected with one end of the first adapter 1-6 into a whole through a split screw ring 19, and the other end of the first adapter 1-6 is provided with a nylon protective cap 1-7 for protecting the screw thread.

Referring to FIG. 6, a first transition joint 1-6 includes a reducer lower joint body 3-1; a seven-core normal-pressure socket body 3-3 is arranged in the reducing lower joint body 3-1, a first check ring 3-2 is arranged on the inner walls of the seven-core normal-pressure socket body 3-3 and the reducing lower joint body 3-1, and a jack insulator 3-4 is arranged in the seven-core normal-pressure socket body 3-3; a seventh O-shaped ring 3-5 is arranged between the reducing lower joint body 3-1 and the nylon protective cap 1-7 and is used for sealing and preventing slurry from entering; a slip ring component 3-6 is arranged at the end part of the reducing lower joint body 3-1 and is used for being electrically connected with a lower instrument; wherein, the jack insulator 3-4 is connected with the slip ring component 3-6 through a lead.

The working principle of cable fixing in embodiment 2 is as follows: as shown in fig. 2, the cable is threaded through slips 1-2, grommet 1-4 and compression nut 1-5. The packing ring 1-4 is pressed down by rotating the compression nut 1-5, and then the slips 1-2 are compressed. The slips 1-2 contract under the conical surface between the slip upper joints 1-1 to hold the cable tightly, so that the cable is fixed.

The working principle of cable sealing is as follows: as shown in figure 2, the cable passes through the rubber sleeve 13, the bushing 14 and the spiral ring pressing cap 15, the spiral ring pressing cap 15 is in threaded connection with the lower releasing connector 12, and the bushing 14 presses the rubber sleeve 13 downwards when the spiral ring pressing cap 15 is rotated, so that the rubber sleeve 13 holds the cable tightly to realize sealing.

The releasing working principle is as follows: as shown in figure 2, liquid enters the inside of the tool from the upper part and reaches the position of the rubber sleeve 13, the pressure in the tool is increased, when the pressure corresponds to the external pressure, the coiled tubing is lifted, the shearing pin 28 is sheared, and the upper releasing sub 9 is separated from the lower releasing sub 12.

The structure of the mechanical releasing assembly and the connecting shell in the embodiment 2 is the same as that in the embodiment 1.

The two cable fixing assemblies of the embodiment 1 and the embodiment 2 are not limited to the above two ways of fixing the cable, and other ways such as taper sleeve, torpedo and the like are all within the protection range of fixing the cable.

The working process of the invention is as follows:

in the logging operation, the tool is connected to an outer clamping tile connector at the lower end of the coiled tubing, then a cable extends downwards, and the cable is fixed through an outer steel wire of the cable fixed by the copper clamping hoop 7, so that the cable is fixed. The inner steel wire of the cable is sealed by the rubber sleeve 13. The inner steel wire is cut at the spiral pressing cap 15 to expose the cable, and the cable is connected to the upper surface of the sealing needle 4-3 of the 7-core pressure bearing disc 25 at the lower end, so that the electrical connection is realized.

In the logging operation, the tool is connected to an outer slip joint at the lower end of the coiled tubing, then a cable stretches down, and the cable is tightly held through slips 1-2, so that the cable is fixed. The lower end of the cable is sealed by a rubber sleeve 13. All steel wires of the cable are cut off at the spiral pressing cap 15 to expose the cable, and the cable is connected to the upper surface of the sealing needle 4-3 of the 7-core pressure bearing disc 25 at the lower end, so that the electrical connection is realized.

In the logging operation, if the lower instrument is blocked, liquid can be injected into the tool from the upper coiled tubing to reach the position of the rubber sleeve 13, the internal pressure of the tool is increased, and when the external pressure is equal to that of lifting the coiled tubing, the shearing pin 28 is sheared, so that the upper releasing joint 9 is separated from the lower releasing joint 12, and the releasing operation is realized.

After the coiled tubing is threaded through the cable, the instrument string at the lower part needs to be connected with the coiled tubing. The cable at the upper end is firstly fixed by a fixing device in the tool, and the fixing device has two fixing modes, namely a slip mode and a copper clamp mode, but not limited to the two fixing modes. The cable is sealed at the lower extreme accessible after fixed for the inside liquid of upper end coiled tubing can't flow down, realizes sealedly, prevents that liquid from entering into the lower extreme and influencing the insulation, realizes normal logging.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.

Claims

1. A coiled tubing cable sealing and fixing device is characterized by comprising a cable fixing component, a mechanical releasing component, a connecting shell (16) and an electrical conversion component; one end of the cable fixing component is in threaded connection with one end of the mechanical releasing component and is used for compressing and fixing the cable; the other end of the mechanical releasing assembly is in threaded connection with one end of the connecting shell (16), and a cable sealing assembly is arranged on the mechanical releasing assembly in one end of the connecting shell (16); the other end of the connecting shell (16) is connected with the electrical conversion component in a threaded mode.

2. The coiled tubing cable sealing and securing device according to claim 1, wherein the cable securing assembly comprises an upper joint body (2), a positioning split toroid (5), a clamp seat (6), a copper clamp (7) and a compression sleeve (8); protective cap (1) is assembled to the one end of top connection body (2), the other end threaded connection of top connection body (2) is in the one end of mechanical releasing subassembly, be equipped with the through-hole in clamp seat (6), clamp seat (6) are including the assembly end, extension end and stiff end, the assembly end is fixed on top connection body (2) in the one end of mechanical releasing subassembly, the location is established on the extension is served to split spiro (5) cover, and threaded connection is on top connection body (2) in the one end of mechanical releasing subassembly, copper clamp (7) and compress tightly cover (8) and assemble in the through-hole of stiff end in proper order, compress tightly cover (8) in the through-hole of stiff end through threaded connection, and compress tightly the setting to copper clamp (7).

3. The coiled tubing cable sealing and securing device of claim 2, wherein the mechanical release assembly comprises a release upper sub (9) and a release lower sub (12); one end of the upper joint body (2) is connected in the releasing upper joint (9) through threads, and a first O-shaped ring (4) is arranged between the upper joint body (2) and the releasing upper joint (9) for sealing; meanwhile, after the upper joint body (2) and the releasing upper joint (9) are in threaded connection in place, a plurality of jackscrews (3) are arranged at the joint of the upper joint body (2) and the releasing upper joint (9) and used for preventing the threads from loosening.

4. The coiled tubing cable sealing and fixing device as claimed in claim 3, wherein the lower lost joint (12) and the upper released joint (9) are arranged in an opposite insertion manner, a plurality of bosses are arranged on the inner wall of the lower released joint (12) in a surrounding manner, a plurality of grooves are arranged on the outer wall of the upper released joint (9) in a surrounding manner, a plurality of bosses are correspondingly inserted into the plurality of grooves for preventing circumferential rotation between the lower lost joint (12) and the upper released joint (9), the lower released joint (12) and the upper released joint (9) are mutually righted through the first O-shaped ring (4) and the second O-shaped ring (10), and a third O-shaped ring (11) is arranged between the lower released joint (12) and the upper released joint (9) for sealing; a plurality of shearing pins (28) are arranged between the lower lost-hand joint (12) and the upper releasing joint (9); one end of the lower lost-hand joint (12) is connected in the connecting shell (16) through threads, a first O-shaped ring (4) is arranged between the joint of the lower lost-hand joint (12) and the connecting shell (16), and a plurality of jackscrews (3) are arranged at the joint of the lower lost-hand joint (12) and the connecting shell (16) after the lower lost-hand joint (12) and the connecting shell (16) are installed in place through threads, so that the threads are prevented from being loosened; a cable sealing assembly is arranged at one end of a lower lost-hand joint (12) in a connecting shell (16), the cable sealing assembly comprises a rubber sleeve (13), a bushing (14) and a spiral ring pressing cap (15), and the spiral ring pressing cap (15) is connected to one end of the lower lost-hand joint (12) through threads; the rubber sleeve (13) and the bushing (14) are sequentially arranged between the spiral ring pressing cap (15) and the hand lower joint (12), one end of the rubber sleeve (13) abuts against the hand lower joint (12), one end of the rubber sleeve abuts against the bushing (14), the other end of the bushing (14) abuts against the spiral ring pressing cap (15), the rubber sleeve (13) can be pressed by adjusting the spiral ring pressing cap (15), and the pressing of a cable in the hand lower joint (12) is achieved.

5. The coiled tubing cable sealing and fixing device according to claim 4, wherein the connection housing (16) is provided with an oil filling plug (27) and a grease filling plug (18), and the oil filling plug (27) is correspondingly sleeved with a sixth O-shaped ring (26); prevent external mud from entering; a fourth O-shaped ring (17) is correspondingly sleeved on the grease injection plug (18); a split spiral ring (19) is further arranged on the connecting shell (16), a second conversion joint (22) is sleeved on the electric conversion assembly, the second conversion joint (22) is in threaded connection with the connecting shell (16) through the split spiral ring (19), and the contact position between the second conversion joint (22) and the connecting shell (16) is sealed through a first O-shaped ring (4) to prevent external slurry from entering; the second conversion joint (22) is provided with a groove from the threaded connection part of the split spiral ring (19) to the end part of the connection shell (16), a guide key (20) is arranged in the connection shell (16), the guide key (20) is arranged in the groove in the second conversion joint (22) and slides in the rotating process of the split spiral ring (19) to limit the movement between the connection shell (16) and the second conversion joint (22); a seven-core pressure-bearing disk (25) is arranged on the connection housing (16) for sealing and electrical connection.

6. The coiled tubing cable sealing and fixing device according to claim 5, wherein the second adapter (22) comprises a single-core lower adapter body (2-1), a long seven-core normal pressure socket body (2-3) is arranged in the single-core lower adapter body (2-1), a lower protective cap (24) is assembled at the other end of the single-core lower adapter body (2-1), and a fifth O-shaped ring (23) is arranged between the single-core lower adapter body (2-1) and the lower protective cap (24); one end of the long seven-core normal-pressure socket body (2-3) is abutted against one end of the inner side of the single-core lower joint body (2-1) through a second check 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 jack insulators (2-4) are further arranged in the long seven-core normal-pressure socket body (2-3); a through hole is arranged in the insulating sleeve (2-6), an insulating pad (2-9) is assembled at the end part of the insulating sleeve (2-6), and the insulating pad (2-9) is propped against the long seven-core normal-pressure socket body (2-3) through a third retaining ring (2-8); the conducting posts (2-7) are sleeved in the through holes, the springs (2-5) are arranged in the through holes, one ends of the springs are fixed to the inner wall ends, close to the side of the plurality of jack insulators (2-4), of the through holes of the insulating sleeves (2-6), the other ends of the springs are fixed to the conducting posts (2-7), the plurality of jack insulators (2-4) are connected with the conducting posts (2-7) through conducting wires, and the conducting posts (2-7) are close to the plurality of jack insulators (2-4) through pressing down the compression springs (2-5).

7. The coiled tubing cable sealing and securing device according to claim 5, wherein the seven-core pressure bearing disc (25) comprises a seven-core pressure bearing disc body (4-5); a plurality of sealing needles (4-3) are arranged on the seven-core pressure bearing disc body (4-5); the plurality of sealing needles (4-3) are respectively provided with a jack (4-1) and a rubber sleeve (4-2); an eighth O-shaped ring (4-4) is arranged between the seven-core pressure bearing disc body (4-5) and the connecting shell (16) and used for sealing, and the other end of the seven-core pressure bearing disc (25) is connected with the electrical conversion assembly.

8. The coiled tubing cable sealing and securing device of claim 1, wherein the cable securing assembly comprises a slip upper joint (1-1), slips (1-2), a slip housing (1-3), a grommet (1-4) and a compression nut (1-5); one end of the slip upper joint (1-1) is provided with an upper protective cap (1), the other end of the slip upper joint (1-1) is in threaded connection with one end of a slip shell (1-3), the other end of the slip shell (1-3) is in threaded connection with one end of a mechanical releasing assembly, a slip (1-2), a backing ring (1-4) and a gland nut (1-5) are arranged in the slip shell (1-3), and the slip (1-2) is arranged on the slip upper joint (1-1) and used for locking a cable; the compression nut (1-5) is connected to the slip upper joint (1-1) through threads, the backing ring (1-4) is arranged between the slip (1-2) and the compression nut (1-5), and the backing ring (1-4) and the compression nut (1-5) are compressed by rotating the threaded slip (1-2), so that the cable is compressed and fixed.

9. The coiled tubing cable sealing and securing device according to claim 1, wherein the connection housing (16) is connected to an electrical conversion assembly, and the electrical conversion assembly is sleeved with a first crossover sub (1-6); the connecting shell (16) is connected with one end of the first adapter (1-6) into a whole through a split spiral ring (19), and the other end of the first adapter (1-6) is provided with a nylon protective cap (1-7) for protecting threads.

10. The coiled tubing cable sealing and securing device according to claim 9, wherein the first crossover sub (1-6) comprises a reducer lower sub body (3-1); a seven-core normal-pressure socket body (3-3) is arranged in the reducing lower joint body (3-1), a first check ring (3-2) is arranged on the inner walls of the seven-core normal-pressure socket body (3-3) and the reducing lower joint body (3-1), and a jack insulator (3-4) is arranged in the seven-core normal-pressure socket body (3-3); a seventh O-shaped ring (3-5) is arranged between the reducing lower joint body (3-1) and the nylon protective cap (1-7) and is used for sealing and preventing slurry from entering; a slip ring component (3-6) is arranged at the end part of the reducing lower joint body (3-1) and is used for being electrically connected with a lower instrument; wherein, the jack insulator (3-4) is connected with the slip ring component (3-6) through a lead.