阅读说明：本技术 电缆固定及密封装置 (Cable fixing and sealing device ) 是由 罗勇 何坤 吴千里 张燕萍 曹川� 彭嵩 侯福祥 冯来 刘志同 卢静 杨斯媛 于 2020-04-28 设计创作，主要内容包括：本发明提供了一种电缆固定及密封装置,电缆固定及密封装置包括：第一壳体,第一壳体内具有锥形腔；卡套,可拆卸地设置在锥形腔内,卡套包括环形件和间隔设置在环形件上的多个弹性爪,多个弹性爪的外周呈锥形设置；第二壳体,可拆卸地与第一壳体连接,第二壳体的一端位于锥形腔内,以与多个弹性爪的端部抵接；第三壳体,可拆卸地与第二壳体连接,第三壳体内具有密封腔；密封套,设置在密封腔内；压套,与第三壳体连接,压套的端部用于对位于密封腔内的密封套施加压力；插座,与压套连接；插头,设置在插座内,插头用于与电缆的导线连接。采用该方案,通过多个零部件的配合实现了对电缆的可靠固定和密封,满足有缆式连续管钻完井作业需求。(The invention provides a cable fixing and sealing device, which comprises: the first shell is internally provided with a conical cavity; the clamping sleeve is detachably arranged in the conical cavity and comprises a ring-shaped piece and a plurality of elastic claws arranged on the ring-shaped piece at intervals, and the peripheries of the elastic claws are arranged in a conical shape; the second shell is detachably connected with the first shell, and one end of the second shell is positioned in the conical cavity and is abutted against the end parts of the elastic claws; the third shell is detachably connected with the second shell, and a sealing cavity is formed in the third shell; the sealing sleeve is arranged in the sealing cavity; the pressing sleeve is connected with the third shell, and the end part of the pressing sleeve is used for applying pressure to the sealing sleeve positioned in the sealing cavity; the socket is connected with the pressing sleeve; and the plug is arranged in the socket and is used for being connected with a lead of the cable. By adopting the scheme, the reliable fixation and sealing of the cable are realized through the matching of a plurality of parts, and the requirement of cable type coiled tubing drill well completion operation is met.)

1. A cable fixing and sealing device for fixing and sealing a cable having an armor layer, an insulating layer and a conductive wire from the outside to the inside, comprising:

a first housing (10), the first housing (10) having a conical cavity therein;

the clamping sleeve (20) is detachably arranged in the conical cavity, the clamping sleeve (20) comprises a ring-shaped part (21) and a plurality of elastic claws (22) arranged on the ring-shaped part (21) at intervals, and the peripheries of the elastic claws (22) are arranged in a conical shape;

a second housing (30) detachably connected to the first housing (10), one end of the second housing (30) being located in the tapered cavity to abut against ends of the plurality of elastic claws (22);

a third housing (40) detachably connected to the second housing (30), the third housing (40) having a sealed chamber therein;

a sealing sleeve (51) disposed within the sealing cavity;

a pressing sleeve (60) connected with the third shell (40), wherein the end part of the pressing sleeve (60) is used for applying pressure to a sealing sleeve (51) positioned in the sealing cavity;

a socket (71) connected to the press sleeve (60);

a plug (72) disposed within the socket (71), the plug (72) for connection with a conductor of the cable;

the first shell (10), the ferrule (20), the second shell (30), the third shell (40), the sealing sleeve (51) and the pressing sleeve (60) can be used for the cable to sequentially pass through, wherein a plurality of elastic claws (22) of the ferrule (20) are used for clamping an armor layer of the cable, and the sealing sleeve (51) is used for sealing an insulating layer of the cable.

2. The cable fixing and sealing device according to claim 1, wherein each of the resilient fingers (22) is provided with a plurality of protrusions (23), the plurality of protrusions (23) being spaced apart along the length of the resilient finger (22), the plurality of protrusions (23) being adapted to engage with the armor layer of the cable.

3. The cable fixation and sealing device of claim 1, further comprising:

two first bearings (52), wherein one first bearing (52) is positioned between the bottom wall of the sealing cavity and the sealing sleeve (51), and the other first bearing (52) is positioned between the sealing sleeve (51) and the end surface of the pressing sleeve (60).

4. The cable fixation and sealing device according to claim 1, wherein the second housing (30) has a vibration proof cavity therein, the cable fixation and sealing device further comprising:

the anti-vibration sleeve (81) is arranged in the anti-vibration cavity, the anti-vibration sleeve (81) is used for being sleeved on the armor layer of the cable, and the end part of the second shell (30) is used for applying pressure to the anti-vibration sleeve (81) located in the anti-vibration cavity.

5. The cable fixation and sealing device of claim 4, further comprising:

two second bearings (82), wherein one second bearing (82) is located between the bottom wall of the vibration-proof cavity and the vibration-proof sleeve (81), and the other second bearing (82) is located between the vibration-proof sleeve (81) and the end face of the second housing (30).

6. The cable fixation and sealing device of claim 1, further comprising:

the back nut (90) of tubular structure, back nut (90) cover is established press on cover (60), a part of socket (71) is worn to establish in back nut (90), the terminal surface of socket (71) with the terminal surface butt of pressing cover (60).

7. The cable retention and sealing device according to claim 6, wherein the back nut (90) has a first step on an inner wall thereof and the pressure sleeve (60) has a second step on an outer wall thereof, the first step and the second step being in positive engagement to define the relative positions of the back nut (90) and the pressure sleeve (60) in the axial direction.

8. The cable fixation and sealing arrangement as recited in claim 1, characterized in that the first housing (10) is screwed to the second housing (30), the second housing (30) having a third step on its outer wall, which third step abuts against an end face of the first housing (10).

9. The cable fixing and sealing device according to claim 1, wherein a portion of the third housing (40) is inserted into the second housing (30), the third housing (40) is screwed with the second housing (30), and a fourth step is provided on an outer wall of the third housing (40) and abuts against an end surface of the second housing (30).

10. The cable fixing and sealing device according to claim 1, wherein a portion of the pressing sleeve (60) is inserted into the third housing (40), the pressing sleeve (60) is screwed with the third housing (40), and a fifth step is provided on an outer wall of the pressing sleeve (60) and abuts against an end surface of the third housing (40).

Technical Field

The invention relates to the technical field of oilfield exploitation, in particular to a cable fixing and sealing device.

Background

With the popularization of the application of coiled tubing in well drilling and completion and downhole operation and the maturity of the cable threading technology of the coiled tubing, the well drilling and completion operation of the coiled tubing with cables starts to rise, and the fixation and sealing of the cables become problems to be solved urgently.

The cable is fixed by using a cable fixing and sealing technology in the well logging industry, the well logging working condition is simple, the well logging time is short, and the installation is complex during use, so that the operation condition of the cable coiled tubing is limited, and the cable coiled tubing is difficult to be applied to coiled tubing drilling and well completion. In cabled coiled tubing drilling and completion, an armored cable is required to be used, the diameter of the cable is large, the outer diameter of a coiled tubing tool is small, a large-diameter cable needs to pass through a small-diameter tool, and a sufficient drilling fluid channel needs to be reserved, so that the cable fixing device is required to be compact in structure and small in size, and is convenient to operate and install on site; the cable is arranged in a drilling fluid environment, so that the drilling fluid is high in flow rate and unstable, the cable is washed by the drilling fluid for a long time, and the cable can vibrate due to unstable flow rate, so that the cable sealing and fixing device is required to be designed to meet the requirements of cable fixing and sealing devices for cable type coiled tubing drill well completion operation, and is firm in fixing and reliable in sealing.

Disclosure of Invention

The invention provides a cable fixing and sealing device, which is used for fixing and sealing a cable and meeting the requirements of cable type coiled tubing drill well completion operation.

In order to achieve the above object, the present invention provides a cable fixing and sealing device for fixing and sealing a cable having an armor layer, an insulating layer and a conductive wire from the outside to the inside, the cable fixing and sealing device comprising: a first housing having a tapered cavity therein; the clamping sleeve is detachably arranged in the conical cavity and comprises a ring-shaped part and a plurality of elastic claws arranged on the ring-shaped part at intervals, and the peripheries of the elastic claws are arranged in a conical shape; the second shell is detachably connected with the first shell, and one end of the second shell is positioned in the conical cavity so as to be abutted against the end parts of the elastic claws; the third shell is detachably connected with the second shell, and a sealed cavity is formed in the third shell; the sealing sleeve is arranged in the sealing cavity; the pressing sleeve is connected with the third shell, and the end part of the pressing sleeve is used for applying pressure to the sealing sleeve positioned in the sealing cavity; the socket is connected with the pressing sleeve; the plug is arranged in the socket and is used for being connected with the conducting wire of the cable; the first shell, the clamping sleeve, the second shell, the third shell, the sealing sleeve and the pressing sleeve can enable the cable to sequentially penetrate through the clamping sleeve, a plurality of elastic claws of the clamping sleeve are used for clamping an armor layer of the cable, and the sealing sleeve is used for sealing an insulating layer of the cable.

Furthermore, each elastic claw is provided with a plurality of convex teeth, the convex teeth are arranged at intervals along the length direction of the elastic claw, and the convex teeth are used for being clamped with an armor layer of the cable.

Further, the cable fixing and sealing device further comprises: and one first bearing is positioned between the bottom wall of the seal cavity and the seal sleeve, and the other first bearing is positioned between the seal sleeve and the end surface of the pressing sleeve.

Further, the second shell is internally provided with a vibration-proof cavity, and the cable fixing and sealing device further comprises: the anti-vibration sleeve is arranged in the anti-vibration cavity and used for being sleeved on the armor layer of the cable, and the end part of the second shell is used for applying pressure to the anti-vibration sleeve in the anti-vibration cavity.

Further, the cable fixing and sealing device further comprises: and two second bearings, wherein one second bearing is positioned between the bottom wall of the vibration-proof cavity and the vibration-proof sleeve, and the other second bearing is positioned between the vibration-proof sleeve and the end surface of the second shell.

Further, the cable fixing and sealing device further comprises: the back of the body of tubular structure is female, the back of the body female cover is established press to sheathe in, partly wear to establish of socket in the back of the body female, the terminal surface of socket with press the terminal surface butt of cover.

Further, a first step is arranged on the inner wall of the back nut, a second step is arranged on the outer wall of the pressing sleeve, and the first step is in limit fit with the second step to limit the relative position of the back nut and the pressing sleeve in the axial direction.

Further, the first shell is in threaded connection with the second shell, a third step is arranged on the outer wall of the second shell, and the third step is abutted to the end face of the first shell.

Furthermore, a part of the third shell penetrates through the second shell, the third shell is in threaded connection with the second shell, a fourth step is arranged on the outer wall of the third shell, and the fourth step is abutted to the end face of the second shell.

Furthermore, a part of the pressing sleeve penetrates through the third shell, the pressing sleeve is in threaded connection with the third shell, a fifth step is arranged on the outer wall of the pressing sleeve, and the fifth step is abutted to the end face of the third shell.

The technical scheme of the invention is applied to provide a cable fixing and sealing device, which comprises: the first shell is internally provided with a conical cavity; the clamping sleeve is detachably arranged in the conical cavity and comprises a ring-shaped piece and a plurality of elastic claws arranged on the ring-shaped piece at intervals, and the peripheries of the elastic claws are arranged in a conical shape; the second shell is detachably connected with the first shell, and one end of the second shell is positioned in the conical cavity and is abutted against the end parts of the elastic claws; the third shell is detachably connected with the second shell, and a sealing cavity is formed in the third shell; the sealing sleeve is arranged in the sealing cavity; the pressing sleeve is connected with the third shell, and the end part of the pressing sleeve is used for applying pressure to the sealing sleeve positioned in the sealing cavity; the socket is connected with the pressing sleeve; the plug is arranged in the socket and is used for being connected with a lead of the cable; the cable clamping device comprises a first shell, a clamping sleeve, a second shell, a third shell, a sealing sleeve and a pressing sleeve, wherein the cable can penetrate through the first shell, the clamping sleeve, the second shell, the third shell, the sealing sleeve and the pressing sleeve in sequence, a plurality of elastic claws of the clamping sleeve are used for clamping an armor layer of the cable, and the sealing sleeve is used for sealing an insulating layer of the cable. By adopting the scheme, the reliable fixation and sealing of the cable are realized through the matching of a plurality of parts, so that the stability and the reliability are improved, and the requirement of cable type coiled tubing drill well completion operation is met.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic diagram of a cable retention and sealing device provided by an embodiment of the present invention;

FIG. 2 shows a schematic structural view of the cable of FIG. 1;

fig. 3 shows a schematic structural view of the ferrule of fig. 1;

fig. 4 shows a cross-sectional view of the ferrule of fig. 3.

Wherein the figures include the following reference numerals:

10. a first housing; 20. a card sleeve; 21. an annular member; 22. an elastic claw; 23. a convex tooth; 30. a second housing; 40. a third housing; 51. sealing sleeves; 52. a first bearing; 60. pressing the sleeve; 71. a socket; 72. a plug; 81. a vibration-proof sleeve; 82. a second bearing; 90. carrying out female backing; 100. a cable; 101. an armor layer; 102. an insulating layer; 103. and (4) conducting wires.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. 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.

As shown in the accompanying drawings, an embodiment of the present invention provides a cable fixing and sealing device for fixing and sealing a cable having an armor layer, an insulating layer and a conductive wire from the outside to the inside, the cable fixing and sealing device comprising: a first housing 10, the first housing 10 having a tapered cavity therein; the cutting sleeve 20 is detachably arranged in the conical cavity, the cutting sleeve 20 comprises a ring-shaped part 21 and a plurality of elastic claws 22 arranged on the ring-shaped part 21 at intervals, and the peripheries of the elastic claws 22 are arranged in a conical shape; a second housing 30 detachably connected to the first housing 10, one end of the second housing 30 being located in the tapered cavity to abut against the ends of the plurality of elastic claws 22; a third housing 40 detachably coupled to the second housing 30, the third housing 40 having a sealed chamber therein; a sealing sleeve 51 disposed within the sealing cavity; a pressing sleeve 60 connected with the third housing 40, wherein the end of the pressing sleeve 60 is used for applying pressure to the sealing sleeve 51 positioned in the sealing cavity; a socket 71 connected with the pressing sleeve 60; a plug 72 disposed in the socket 71, the plug 72 being for connection with a conductor of a cable; the first housing 10, the ferrule 20, the second housing 30, the third housing 40, the sealing sleeve 51 and the pressing sleeve 60 may be sequentially penetrated by a cable, wherein the plurality of elastic claws 22 of the ferrule 20 are used for clamping an armor layer of the cable, and the sealing sleeve 51 is used for sealing an insulation layer of the cable.

The technical scheme of the invention is applied to provide a cable fixing and sealing device, which comprises: a first housing 10, the first housing 10 having a tapered cavity therein; the cutting sleeve 20 is detachably arranged in the conical cavity, the cutting sleeve 20 comprises a ring-shaped part 21 and a plurality of elastic claws 22 arranged on the ring-shaped part 21 at intervals, and the peripheries of the elastic claws 22 are arranged in a conical shape; a second housing 30 detachably connected to the first housing 10, one end of the second housing 30 being located in the tapered cavity to abut against the ends of the plurality of elastic claws 22; a third housing 40 detachably coupled to the second housing 30, the third housing 40 having a sealed chamber therein; a sealing sleeve 51 disposed within the sealing cavity; a pressing sleeve 60 connected with the third housing 40, wherein the end of the pressing sleeve 60 is used for applying pressure to the sealing sleeve 51 positioned in the sealing cavity; a socket 71 connected with the pressing sleeve 60; a plug 72 disposed in the socket 71, the plug 72 being for connection with a conductor of a cable; the first housing 10, the ferrule 20, the second housing 30, the third housing 40, the sealing sleeve 51 and the pressing sleeve 60 may be sequentially penetrated by a cable, wherein the plurality of elastic claws 22 of the ferrule 20 are used for clamping an armor layer of the cable, and the sealing sleeve 51 is used for sealing an insulation layer of the cable. By adopting the scheme, the reliable fixation and sealing of the cable are realized through the matching of a plurality of parts, so that the stability and the reliability are improved, and the requirement of cable type coiled tubing drill well completion operation is met.

In this embodiment, each elastic claw 22 is provided with a plurality of convex teeth 23, the plurality of convex teeth 23 are arranged at intervals along the length direction of the elastic claw 22, and the plurality of convex teeth 23 are used for clamping with the armor layer of the cable. This allows the cable to be snapped into place with the sheath layer by means of the plurality of lugs 23. Moreover, because the periphery of a plurality of elastic claws 22 is the toper setting, has the toper chamber in the first casing 10, when the cable received outside tensile force, elastic claws 22 and a plurality of convex teeth 23 can be with tighter of cable card to realize fixed cable, avoid the cable to take place the displacement.

In this embodiment, the cable fixing and sealing device further includes: two first bearings 52, wherein one first bearing 52 is located between the bottom wall of the sealed cavity and the sealing sleeve 51, and the other first bearing 52 is located between the sealing sleeve 51 and the end face of the pressing sleeve 60. By providing the first bearing 52, the sealing sleeve 51 is prevented from being distorted and damaged during the assembly process. Specifically, the sealing sleeve 51 may employ a rubber material. During assembly, the gland 60 compresses the gland 51 and the gland 51 contracts axially and expands radially, thereby clamping the cable insulation to achieve a reliable seal. Specifically, the first bearing 52 is a thrust bearing.

In this embodiment, the second housing 30 has a vibration-proof cavity therein, and the cable fixing and sealing device further includes: the anti-vibration sleeve 81 is arranged in the anti-vibration cavity, the anti-vibration sleeve 81 is used for being sleeved on an armor layer of the cable, and the end part of the second shell 30 is used for applying pressure to the anti-vibration sleeve 81 located in the anti-vibration cavity. Through setting up antivibration cover 81, can improve the stability of cable, reduce the cable vibration. Specifically, the vibration-proof sleeve 81 may be made of rubber.

In this embodiment, the cable fixing and sealing device further includes: and two second bearings 82, wherein one second bearing 82 is located between the bottom wall of the vibration-proof cavity and the vibration-proof sleeve 81, and the other second bearing 82 is located between the vibration-proof sleeve 81 and the end surface of the second housing 30. By providing the second bearing 82, the vibration-proof sleeve 81 can be prevented from being damaged by twisting during assembly. Specifically, the second bearing 82 is a thrust bearing.

In this embodiment, the cable fixing and sealing device further includes: the back nut 90 of the tubular structure is sleeved on the pressing sleeve 60, a part of the socket 71 is arranged in the back nut 90 in a penetrating way, and the end face of the socket 71 is abutted against the end face of the pressing sleeve 60. This enables the connection of the compression sleeve 60 and the socket 71 by the back nut 90. Alternatively, the socket 71 and the back nut 90 are connected by screw threads.

Alternatively, the socket 71 includes a sheath body and a limiting ring disposed in the sheath body, the sheath body is fitted with the pressing sleeve 60, and the lead of the cable passes through the limiting ring to be limited by the limiting ring. The sleeve body is internally provided with a mounting cavity, and the plug 72 is arranged in the mounting cavity.

Optionally, to improve the seal, a sealing ring is provided between the plug 72 and the jacket body. And a sealing ring is arranged between the limiting ring and the lead.

In this embodiment, the back nut 90 has a first step on its inner wall, and the pressing sleeve 60 has a second step on its outer wall, and the first step and the second step are in limit fit to define the relative positions of the back nut 90 and the pressing sleeve 60 in the axial direction. Thus, the positioning and the limiting of the back nut 90 and the pressing sleeve 60 can be realized through the matching of the first step and the second step.

In the present embodiment, the first casing 10 is screwed to the second casing 30, and the outer wall of the second casing 30 has a third step, which abuts against the end surface of the first casing 10. By adopting the structure, the operation is convenient and the connection is reliable.

In the present embodiment, a part of the third housing 40 is inserted into the second housing 30, the third housing 40 is screwed to the second housing 30, a fourth step is provided on an outer wall of the third housing 40, and the fourth step abuts against an end surface of the second housing 30. By adopting the structure, the operation is convenient and the connection is reliable.

In the present embodiment, a part of the pressing sleeve 60 is inserted into the third housing 40, the pressing sleeve 60 is screwed with the third housing 40, a fifth step is provided on an outer wall of the pressing sleeve 60, and the fifth step abuts against an end surface of the third housing 40. By adopting the structure, the operation is convenient and the connection is reliable.

For ease of understanding, the principle and assembly of the device is described below.

The principle of cable fixation: firstly, processing the armored cable which penetrates out of the continuous pipe, stripping a section of armor layer and a section of insulating layer; wear to establish the armor layer at the armoured cable with first casing again, later wear to establish the armor layer at the armoured cable with the cutting ferrule, wear to establish simultaneously in the hole of first casing, pass through the first casing lower extreme of screw thread screw in with the second casing at last, the cutting ferrule removal is being pushed against to the second casing up end when screwing in, the elastic claw shrink of cutting ferrule simultaneously, when the second casing was completely screwed in, the cable hole internal diameter after the elastic claw shrink is less than the external diameter of armoured cable, the dogtooth of cutting ferrule can bite into the armoured cable layer this moment. When the armored cable moves leftwards, the clamping sleeve moves leftwards simultaneously, the elastic claws can continue to contract, the convex teeth of the clamping sleeve can bite into the armored cable layer deeper, and the armored cable is limited to continue to move leftwards.

The cable antivibration principle: after the screw in second casing, respectively place a second bearing with the antivibration cover both ends, wear to establish the armoured cable layer of armoured cable to wear to establish in the hole of second casing, later screw in third casing, the up end of third casing can push up the second bearing and move left at the in-process of screw in, and the antivibration cover can constantly compress this moment. And the second bearing can prevent the anti-vibration sleeve from being distorted in the rotating process and protect the anti-vibration sleeve from being distorted and damaged. After the third shell is screwed in place, the compression of the anti-vibration sleeve is finished. The anti-vibration sleeve is tightly attached to the armored cable layer, and absorbs the vibration of the armored cable by using the rubber elasticity of the anti-vibration sleeve so as to achieve the anti-vibration purpose.

The cable sealing principle is as follows: after the screw in third casing, respectively place a second bearing with the seal cover both ends, wear to establish the insulating layer of armoured cable to wear to establish in the hole of third casing, later the screw in presses the cover, and the up end that presses the cover at the in-process of screw in can push up the second bearing and move left, and the seal cover can constantly compress this moment. And the second bearing can play and prevent the seal cover distortion at rotatory in-process, and the protection seal cover does not receive the distortion damage. After the pressing sleeve is screwed in place, the compression of the sealing sleeve is finished. The sealing sleeve is tightly attached to the insulating layer, and the sealing sleeve utilizes the rubber elasticity of the sealing sleeve to seal the insulating layer so as to achieve the sealing purpose.

Then the pressing sleeve is in threaded connection with the socket through the back nut, then the wires of the cable plug are connected with the wires of the armored cable, the cable plug is arranged on the socket in a penetrating mode, the cable butt joint plug is reserved, and all connection is completed.

The invention provides a cable fixing and sealing device suitable for cabled coiled tubing drill completion operation, which can solve the problem of cable fixing and sealing in cabled coiled tubing drill completion operation. The device can fix the cable and seal the cable, and the field operation is simple and rapid.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.