CN108286418B - Cable connection structure and method for intelligent measuring and adjusting injection device of coiled tubing of water injection well - Google Patents
Cable connection structure and method for intelligent measuring and adjusting injection device of coiled tubing of water injection well Download PDFInfo
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- CN108286418B CN108286418B CN201810156945.0A CN201810156945A CN108286418B CN 108286418 B CN108286418 B CN 108286418B CN 201810156945 A CN201810156945 A CN 201810156945A CN 108286418 B CN108286418 B CN 108286418B
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- oil pipe
- intelligent measuring
- coiled tubing
- continuous oil
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- 238000002347 injection Methods 0.000 title claims abstract description 44
- 239000007924 injection Substances 0.000 title claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000007789 sealing Methods 0.000 claims abstract description 57
- 229920001296 polysiloxane Polymers 0.000 claims abstract description 27
- 239000004519 grease Substances 0.000 claims abstract description 26
- 239000000945 filler Substances 0.000 claims abstract description 6
- 210000004907 gland Anatomy 0.000 claims description 25
- 210000002445 nipple Anatomy 0.000 claims description 18
- 239000010410 layer Substances 0.000 claims description 15
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 12
- 229910052802 copper Inorganic materials 0.000 claims description 12
- 239000010949 copper Substances 0.000 claims description 12
- 238000003825 pressing Methods 0.000 claims description 11
- 230000001681 protective effect Effects 0.000 claims description 10
- 239000003129 oil well Substances 0.000 claims description 9
- 230000008878 coupling Effects 0.000 claims description 7
- 238000010168 coupling process Methods 0.000 claims description 7
- 238000005859 coupling reaction Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 5
- 241000191291 Abies alba Species 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000011241 protective layer Substances 0.000 claims description 3
- 238000011900 installation process Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 5
- 239000002390 adhesive tape Substances 0.000 description 4
- 239000000725 suspension Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- -1 polyethylene core Polymers 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002332 oil field water Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 125000003003 spiro group Chemical group 0.000 description 1
- 238000004018 waxing Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/04—Casing heads; Suspending casings or tubings in well heads
- E21B33/0407—Casing heads; Suspending casings or tubings in well heads with a suspended electrical cable
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
The invention provides a cable connection structure and a method for an intelligent measuring and adjusting injector of a continuous oil pipe of a water injection well.A first cable channel is arranged in a sealing part, two ends of the continuous oil pipe are respectively connected with an upper continuous oil pipe fitting and a lower continuous oil pipe fitting, the upper continuous oil pipe fitting is connected with the sealing part, and the lower continuous oil pipe fitting is connected with the intelligent measuring and adjusting injector; one of the two cables for supplying power to the underground intelligent measuring and dispensing device sequentially passes through the sealing part and the continuous oil pipe from top to bottom and then is connected with the upper joint of the intelligent measuring and dispensing device through the wiring device, a filler is arranged between the first cable channel of the sealing part and the one cable, silicone grease is filled between the wiring device and the one cable, and the other cable is grounded. According to the invention, the cable is clamped, suspended, pressed and sealed through the sealing part, so that the cable is effectively supported and sealed, the continuous oil pipe and the intelligent measuring and dispensing device are ensured to be combined for use, and the construction is convenient, time-saving and labor-saving.
Description
Technical Field
The invention belongs to the technical field of oilfield water injection matched tools, and particularly relates to a cable connection structure and method of an intelligent measuring, adjusting and injection allocation device for a continuous oil pipe of a water injection well.
Background
Along with further development of oil fields, water injection wells are increasingly increased, in the long-term water injection process, wall scaling and wax precipitation can occur in the water injection wells when conventional oil pipes and intelligent measuring and injection allocation devices are matched, so that the oil pipes are blocked, the requirement of fine separate-layer water injection of the oil fields is seriously influenced, and the measuring and injection expense matched with the later stage is increased. In order to further improve the layering fine water injection work, a novel water injection way is sought, a coiled tubing is used for replacing a traditional oil pipe, the construction process of a cable and an injection allocation device in the traditional mode is eliminated, and the coiled tubing integrates the cable inside the coiled tubing to realize remote control of the intelligent measuring injection allocation device of underground layering water injection dynamics.
After the cable is led into the coiled tubing, the cable is led out from the wellhead, so that the cable is effectively supported and sealed at high pressure at the wellhead of the water injection well, and therefore, the cable connection structure of the intelligent measuring and adjusting injection well coiled tubing is needed.
Disclosure of Invention
The invention aims to provide a cable connection structure and a cable connection method for an intelligent measuring and adjusting injection device of a continuous oil pipe of a water injection well, which realize effective bearing and high-pressure sealing of the cable at the wellhead of the water injection well.
In order to achieve the above purpose, the invention provides a cable connection structure of an intelligent measuring, adjusting and injecting device of a continuous oil pipe of a water injection well, which comprises a wellhead christmas tree, a continuous oil pipe, an intelligent measuring, adjusting and injecting device and a sealing part, wherein the sealing part is arranged between the wellhead christmas tree and the continuous oil pipe, a first cable channel is arranged in the sealing part, two ends of the continuous oil pipe are respectively connected with an upper fitting of the continuous oil pipe and a lower fitting of the continuous oil pipe, the upper fitting of the continuous oil pipe is connected with the sealing part, and the lower fitting of the continuous oil pipe is connected with the intelligent measuring, adjusting and injecting device;
one of the two cables for supplying power to the underground intelligent measuring and dispensing device sequentially passes through the sealing part, the continuous oil pipe and the lower fitting of the continuous oil pipe from top to bottom and then is connected with the upper joint of the intelligent measuring and dispensing device through a wiring device, a filler is arranged between a first cable channel of the sealing part and the one cable, silicone grease is filled between the wiring device and the one cable, and the other cable is grounded.
The wiring device comprises an upper end head, a middle protective cylinder and a lower end head which are sequentially connected from top to bottom, wherein a copper cone and a pressing cap are arranged in the upper end head, a second cable channel and a first cavity are arranged in the upper end head, the copper cone is arranged in the first cavity, the lower end of the first cavity is connected with the pressing cap, cable core channels for penetrating through cable cores are arranged in the middle of the copper cone and the middle of the pressing cap, and the second cable channels are communicated with the cable core channels;
the intelligent measuring and dispensing device is characterized in that a protective cylinder cavity is arranged in the middle protective cylinder, a silicone grease hole communicated with the protective cylinder cavity is formed in the middle protective cylinder, a silicone grease hole screw is arranged on the silicone grease hole, an outgoing line is sealed in the lower end head and located on the central axis of the lower end head and penetrates through the whole lower end head, a cavity II is formed in the lower end of the lower end head, and the cavity II is connected with a plug on an upper connector of the intelligent measuring and dispensing device.
The sealing part comprises a secondary cable sealing piece, a reducing flange, a primary cable sealing piece, a hanging flange and a hanger which are sequentially arranged from top to bottom, the hanger is tightly pressed and sealed through a hanger gland and the primary cable sealing piece, and all parts of the sealing part are fixedly connected through bolts;
the secondary cable sealing member is a rubber block matched with the inner wall of the reducing flange, a rubber gland is arranged on the rubber block, a cable hole is formed in the side face of the rubber gland, and the primary cable sealing member is matched and sealed with the inner wall of the hanging flange.
The coiled tubing lower fitting and the intelligent measuring and dispensing device are in threaded connection through an oil pipe nipple I and a wiring device.
And a rubber sleeve is arranged at the joint of the wiring device and the upper joint of the intelligent measuring and dispensing device.
The continuous oil pipe is a flexible composite pipe and consists of an inner layer, a reinforced compression layer, a tensile layer and an outer protective layer.
The invention also provides a cable connection method of the intelligent measuring and adjusting injection device for the coiled tubing of the water injection well, which comprises the following steps:
step 1), a downhole tool section pipe column comprises a coupling I, an oil pipe nipple I and an intelligent measuring and allocating injector which are sequentially connected from top to bottom;
step 2) installing a wellhead blowout preventer;
step 3) connecting a coiled tubing from top to bottom, wherein the coiled tubing lower fitting and the downhole tool section 27 pipe column form a coiled tubing pipe column;
step 4) connecting a core cable with an upper joint of the intelligent measuring and dispensing device through a wiring device, filling silicone grease from a silicone grease hole after connection, screwing a silicone grease hole screw, and fixing a fitting on the continuous oil pipe with a hanging flange;
step 5) running a coiled tubing string, and fixing a hanger gland, a hanging flange and a wellhead flange;
step 6), a core cable sequentially passes through the coiled tubing lower fitting, the coiled tubing upper fitting and the sealing part from bottom to top;
step 7) a core cable is penetrated out of a cable hole on the side surface of a rubber gland of the secondary cable sealing element, the rubber gland is arranged on a hanger gland, and the rubber gland is fixed on an oil outlet pipe by a clamp;
step 8) installing a wellhead production tree.
The oil well pipe column is installed on the four-way flange, and the oil well pipe column is installed on the hanging flange through the hanging flange.
The wellhead blowout preventer installation process is as follows: the lower end of the wellhead blowout preventer is connected with the hanging flange through the transition flange, and the upper end of the wellhead blowout preventer is connected with the collar and the cock through the clamping seat.
The beneficial effects of the invention are as follows:
the invention clamps, hangs, compresses and seals the cable through the sealing part, realizes effective bearing and sealing of the cable, ensures that the continuous oil pipe and the intelligent measuring, distributing and injecting device are combined for use, has convenient construction, saves time and labor, adopts nonmetallic composite materials, has less possibility of scaling and waxing of the pipe wall, and has better corrosion resistance than the traditional oil pipe.
Further details will be described below with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of the structure of the connection of an intelligent measuring and dispensing injector and a coiled tubing lower fitting;
FIG. 2 is an assembly diagram of the connection of the upper joint of the intelligent measuring and dispensing device and the lower fitting of the coiled tubing;
FIG. 3 is a schematic diagram of the connection structure of the junction device and the upper joint of the intelligent measuring and dispensing device;
FIG. 4 is a schematic diagram of the connection structure of the wellhead Christmas tree and the hardware fitting on the coiled tubing;
FIG. 5 is a schematic view of the installation of a pipe nipple II and a hanging flange;
FIG. 6 is a schematic diagram of a downhole blowout preventer installation.
In the figure: 1. a coiled tubing lower fitting; 2. a spiro ring; 3. a flange; 4. a sealing portion; 5. a wiring device; 6. a downhole tool section interface; 7. a flange nipple; 8. coupling I; 9. oil pipe nipple I; 10. a rubber sleeve; 11. an upper joint; 12. a wellhead production tree; 13. a secondary cable seal; 14. a reducing flange; 15. a filler; 16. a hanger gland; 17. a primary cable seal; 18. a hanging flange; 19. a hanger; 20. a tubing head; 21. fitting a continuous oil pipe; 22. a coiled tubing; 23. oil pipe nipple II; 24. an elevator; 25. a wellhead four-way flange; 26. a wellhead flange; 27. a downhole tool string; 28. a cock; 29. coupling II; 30. a clamping seat; 31. a wellhead blowout preventer; 32. a transition flange; 33. a second cable channel; 34. copper cone; 35. pressing the cap; 36. a cable core channel; 37. a casing cavity; 38. a lead-out wire; 39. an upper end; 40. a lower end; 41. a middle protective cylinder; 42. a silicone hole screw; 43. a first cavity; 44. and a second cavity.
Detailed Description
Example 1:
the embodiment provides a cable connection structure of an intelligent measuring and adjusting injection device of a continuous oil pipe of a water injection well, which comprises a wellhead production tree 12, a continuous oil pipe 22 and an intelligent measuring and adjusting injection device, and further comprises a sealing part 4, wherein the sealing part 4 is arranged between the wellhead production tree 12 and the continuous oil pipe 22, a first cable channel is arranged in the sealing part 4, two ends of the continuous oil pipe 22 are respectively connected with an upper continuous oil pipe fitting 21 and a lower continuous oil pipe fitting 1, the upper continuous oil pipe fitting 21 is connected with the sealing part 4, and the lower continuous oil pipe fitting 1 is connected with the intelligent measuring and adjusting injection device;
one of the two cables for supplying power to the underground intelligent measuring and dispensing device sequentially passes through the sealing part 4, the continuous oil pipe 22 and the continuous oil pipe lower fitting 1 from top to bottom and then is connected with the intelligent measuring and dispensing device upper joint through the wiring device 5, a filler 15 is arranged between a first cable channel of the sealing part 4 and the one cable, silicone grease is filled between the wiring device and the one cable, and the other cable is grounded. Wherein the filler 15 acts to compress the cable.
The connection part of the intelligent measuring and allocating device and the lower continuous oil pipe fitting 1 is shown in fig. 1 and 2, the lower continuous oil pipe fitting 1 is connected with an underground tool section interface 6 through a flange 3, a spiral ring 2 and a flange nipple 7, the underground tool section 27 comprises the intelligent measuring and allocating device, and a coupling I8 and an oil pipe nipple I9 are arranged between each layer of the intelligent measuring and allocating device.
According to the invention, the cable is clamped, suspended, pressed and sealed through the sealing part 4, so that the cable is effectively supported and sealed, the continuous oil pipe 22 is ensured to be used in combination with the intelligent measuring and dispensing device, and the construction is convenient, time-saving and labor-saving.
Example 2:
on the basis of embodiment 1, the embodiment provides a cable connection structure of an intelligent measuring and adjusting injector for a continuous oil pipe of a water injection well, wherein the wiring device 5 comprises an upper end head 39, a middle protective cylinder 41 and a lower end head 40 which are sequentially connected from top to bottom, a copper cone 34 and a pressing cap 35 are arranged in the upper end head 39, a second cable channel 33 and a first cavity 43 are arranged in the upper end head 39, the copper cone 34 is arranged in the first cavity 43, the lower end of the first cavity 43 is connected with the pressing cap 35, cable core channels 36 for penetrating through cable cores are arranged in the middle parts of the copper cone 34 and the pressing cap 35, and the second cable channel 33 is communicated with the cable core channels 36;
the middle casing 41 is internally provided with a casing cavity 37, the middle casing 41 is provided with a silicone grease hole communicated with the casing cavity 37, the silicone grease hole is provided with a silicone grease hole screw 42, the lower end 40 is internally sealed with an outgoing line 38, the outgoing line 38 is positioned on the central axis of the lower end 40 and penetrates through the whole lower end 40, the lower end of the lower end 40 is provided with a second cavity 44, and the second cavity 44 is connected with a plug on the upper joint 11 of the intelligent measuring and dispensing device. As shown in fig. 3.
The specific connection process comprises the following steps:
(1) The cable is first passed through the upper end 39 and then the outer skin is stripped of two layers of steel wires, the cable core is passed through the copper cone 34, and the length is reserved to about 20 cm. The cap 35 is used to press the copper cone 34 tightly against the upper end 39 and the wire is then secured.
(2) The cable core is passed through the intermediate sleeve 41 and then welded to the left end of the lead-out wire 38, and then wrapped around the lead-out wire joint with a high pressure self-adhesive tape.
(3) The electrician adhesive tape is wound at the tail end of the high-pressure adhesive tape for a few turns to prevent the high-pressure adhesive tape from loosening during construction, and the wire is carefully plugged into the protective cylinder cavity 5 of the middle protective cylinder 41 after winding.
(4) After the upper end head 39, the lower end head 40 and the middle casing 41 are screwed up, silicone grease is injected from the silicone grease holes until the silicone grease overflows from the cable inlet at the top of the upper end head 39, then the silicone grease hole screws 42 are screwed up, and finally the sealing plug at the cable inlet is pressed down, so that the sealing is realized by being connected with the intelligent measuring and injecting device.
Example 3:
on the basis of embodiment 1, the embodiment provides a cable connection structure of an intelligent measuring and distributing injector for a continuous oil pipe of a water injection well, wherein the sealing part 4 comprises a secondary cable sealing element 13, a reducing flange 14, a primary cable sealing element 17, a hanging flange 18 and a hanger 19 which are sequentially arranged from top to bottom, the hanger 19 is tightly pressed and sealed through a hanger pressing cover 16 and the primary cable sealing element 17, and all parts of the sealing part 4 are fixedly connected through bolts;
the secondary cable sealing member 13 is a rubber block matched with the inner wall of the reducing flange 14, a rubber gland is arranged on the rubber block, a cable hole is formed in the side face of the rubber gland, the primary cable sealing member 17 is matched and sealed with the inner wall of the hanging flange 18. The structure of the seal portion 4 is shown in FIG. 4, with tubing head 20 connecting the casing head and the seal portion.
In this embodiment, the coiled tubing lower fitting 1 and the intelligent measuring and adjusting injector are in threaded connection through an oil pipe nipple i 9 and a wiring device 5.
And a rubber sleeve 10 is arranged at the joint of the wiring device 5 and the upper joint of the intelligent measuring and dispensing device.
The coiled tubing 22 is a flexible composite tubing, and is composed of an inner layer, a reinforced compression layer, a tensile layer and an outer protective layer. The material is modified polyethylene core pipe, fiber pressurizing layer, steel wire rope tension layer and modified polyethylene outer protecting layer. The wall of the flexible composite pipe is not easy to scale and wax, and has better corrosion resistance than the traditional oil pipe.
Example 4:
the embodiment provides a cable connection method of an intelligent measuring and adjusting injection device for a continuous oil pipe of a water injection well, which comprises the following steps:
step 1) a downhole tool section pipe column 27, wherein the downhole tool section pipe column 27 comprises a coupling I8, an oil pipe nipple I9 and an intelligent measuring and allocating injector which are sequentially connected from top to bottom;
step 2) installing a wellhead blowout preventer 31;
step 3) connecting the coiled tubing 22, the coiled tubing lower fitting 1 and the downhole tool section tubing string 27 from top to bottom to form a coiled tubing string;
step 4) connecting a core cable with the upper joint 11 of the intelligent measuring and adjusting injection device through a wiring device, filling silicone grease from a silicone grease hole after connection, screwing down a silicone grease hole screw 42, and then fixing the upper fitting 21 of the coiled tubing with the hanging flange 18;
step 5) running a coiled tubing string, fixing a hanger gland 16, a hanger flange 18 and a wellhead flange 26;
step 6), a core cable sequentially passes through the coiled tubing lower fitting 1, the coiled tubing 22, the coiled tubing upper fitting 21 and the sealing part 4 from bottom to top;
step 7) a core cable is penetrated out of a cable hole on the side surface of the rubber gland of the secondary cable sealing element 13, the rubber gland is installed on the hanger gland 16, and the rubber gland is fixed on an oil outlet pipe by using a clamp;
step 8) installing wellhead tree 12.
Wherein, still include the well tool section tubular column 27 to finish down, with elevator 24 to sit the oil well tubular column to the well head, then install tubing nipple II 23 in the upper end of well tool section tubular column 27, pass suspension flange 18 from tubing nipple II 23, then hang the oil well tubular column from tubing nipple II 23 department, demolish elevator 24, install suspension flange 18 on well head cross flange 25, with elevator 24 to sit the oil well tubular column on suspension flange 18. As shown in fig. 5.
The wellhead blowout preventer 31 is installed as follows: the lower end of the wellhead blowout preventer 31 is connected with the hanging flange 18 through the transition flange 32, and the upper end of the wellhead blowout preventer 31 is connected with the collar II 29 and the cock 28 through the clamping seat 30. As shown in fig. 6.
The portions of this embodiment not described in detail are known and commonly used in the industry and are not described here.
The foregoing examples are merely illustrative of the present invention and are not intended to limit the scope of the present invention, and all designs that are the same or similar to the present invention are within the scope of the present invention.
Claims (6)
1. The utility model provides a water injection well coiled tubing intelligence survey allocation annotator cable junction method, uses water injection well coiled tubing intelligence survey allocation annotator cable junction structure, connection structure includes well head christmas tree (12), coiled tubing (22) and intelligent survey allocation annotator, its characterized in that: the intelligent measuring and injecting device is characterized by further comprising a sealing part (4), wherein the sealing part (4) is arranged between the wellhead production tree (12) and the continuous oil pipe (22), a first cable channel is arranged in the sealing part (4), two ends of the continuous oil pipe (22) are respectively connected with an upper continuous oil pipe fitting (21) and a lower continuous oil pipe fitting (1), the upper continuous oil pipe fitting (21) is connected with the sealing part (4), and the lower continuous oil pipe fitting (1) is connected with an intelligent measuring and injecting device;
one of the two core cables for supplying power to the intelligent measuring and dispensing device sequentially passes through the sealing part (4), the continuous oil pipe (22) and the continuous oil pipe lower fitting (1) from top to bottom and then is connected with the upper joint (11) of the intelligent measuring and dispensing device through the wiring device (5), a filler (15) is arranged between a first cable channel of the sealing part (4) and the one core cable, silicone grease is injected between the wiring device (5) and the one core cable, and the other core cable is grounded;
the sealing part (4) comprises a secondary cable sealing piece (13), a reducing flange (14), a primary cable sealing piece (17), a hanging flange (18) and a hanger (19) which are sequentially arranged from top to bottom, the hanger (19) is tightly pressed and sealed through a hanger gland (16) and the primary cable sealing piece (17), and the reducing flange (14), the hanger gland (16) and the hanging flange (18) of the sealing part (4) are fixedly connected through bolts;
the secondary cable sealing member (13) is a rubber block matched with the inner wall of the reducing flange (14), a rubber gland is arranged on the rubber block, a cable hole is formed in the side face of the rubber gland, and the primary cable sealing member (17) is matched and sealed with the inner wall of the hanging flange (18);
the wiring device (5) comprises an upper end head (39), a middle protective cylinder (41) and a lower end head (40) which are sequentially connected from top to bottom, a copper cone (34) and a pressing cap (35) are arranged in the upper end head (39), a second cable channel (33) and a first cavity (43) are arranged in the upper end head (39), the copper cone (34) is arranged in the first cavity (43), the lower end of the first cavity (43) is connected with the pressing cap (35), cable core channels (36) used for penetrating cable cores are respectively arranged in the middle of the copper cone (34) and the middle of the pressing cap (35), and the second cable channel (33) is communicated with the cable core channels (36);
the middle pile casing (41) is internally provided with a pile casing cavity (37), the middle pile casing (41) is provided with a silicone grease hole communicated with the pile casing cavity (37), the silicone grease hole is provided with a silicone grease hole screw (42), the lower end head (40) is internally sealed with an outgoing line (38), the outgoing line (38) is positioned on the central axis of the lower end head (40) and penetrates through the whole lower end head (40), the lower end of the lower end head (40) is provided with a cavity II (44), and the cavity II (44) is connected with a plug on the upper joint (11) of the intelligent measuring and dispensing device;
the cable connection method comprises the following steps:
step 1) a downhole tool section pipe column (27), wherein the downhole tool section pipe column (27) comprises a coupling I (8), an oil pipe nipple I (9) and an intelligent measuring and allocating injector which are sequentially connected from top to bottom;
step 2) installing a wellhead blowout preventer (31);
step 3) connecting a coiled tubing (22), a coiled tubing lower fitting (1) and a downhole tool section tubular column (27) from top to bottom to form a coiled tubing tubular column;
step 4) connecting a core cable with an upper joint (11) of the intelligent measuring and dispensing injector through a wiring device (5), filling silicone grease from a silicone grease hole after connection, screwing a silicone grease hole screw (42), and fixing an upper fitting (21) of the coiled tubing with a hanging flange (18);
step 5) running a coiled tubing string, and fixing a hanger gland (16), a hanging flange (18) and a wellhead flange (26);
step 6), a core cable sequentially passes through the coiled tubing lower fitting (1), the coiled tubing (22), the coiled tubing upper fitting (21) and the sealing part (4) from bottom to top;
step 7) a core cable is penetrated out of a cable hole on the side surface of a rubber gland of the secondary cable sealing element (13), the rubber gland is mounted on a hanger gland (16), and the rubber gland is fixed on an oil outlet pipe by a clamp;
step 8) installing a wellhead production tree (12).
2. The cable connection method for the intelligent measuring and distributing injector of the continuous oil pipe of the water injection well, which is characterized by comprising the following steps of: the coiled tubing lower fitting (1) and the intelligent measuring and adjusting injection device are in threaded connection through an oil pipe nipple I (9).
3. The cable connection method for the intelligent measuring and distributing injector of the continuous oil pipe of the water injection well, which is characterized by comprising the following steps of: and a rubber sleeve (10) is arranged at the joint of the wiring device (5) and the upper joint of the intelligent measuring and dispensing device.
4. The cable connection method for the intelligent measuring and distributing injector of the continuous oil pipe of the water injection well, which is characterized by comprising the following steps of: the continuous oil pipe (22) is a flexible composite pipe and consists of an inner layer, a reinforced compression layer, a tensile layer and an outer protective layer.
5. The cable connection method for the intelligent measuring and distributing injector of the continuous oil pipe of the water injection well, which is characterized by comprising the following steps of: the oil well pipe column is characterized by further comprising an underground tool section pipe column (27), wherein after the underground tool section pipe column (27) is arranged, the oil well pipe column is arranged on a wellhead by using an elevator (24), then an oil pipe nipple II (23) is arranged at the upper end of the underground tool section pipe column (27), a hanging flange (18) passes through the oil pipe nipple II (23), then the oil well pipe column is lifted from the oil pipe nipple II (23), the elevator (24) is removed, the hanging flange (18) is arranged on the four-way flange (3), and the oil well pipe column is arranged on the hanging flange (18) by using the elevator (24).
6. The intelligent testing and adjusting injector cable connection method for the coiled tubing of the water injection well according to claim 1, wherein the installation process of the wellhead blowout preventer (31) is as follows: the lower end of a wellhead blowout preventer (31) is connected with a hanging flange (18) through a transition flange (32), and the upper end of the wellhead blowout preventer (31) is connected with a coupling (8) and a cock (28) through a clamping seat (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810156945.0A CN108286418B (en) | 2018-02-24 | 2018-02-24 | Cable connection structure and method for intelligent measuring and adjusting injection device of coiled tubing of water injection well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810156945.0A CN108286418B (en) | 2018-02-24 | 2018-02-24 | Cable connection structure and method for intelligent measuring and adjusting injection device of coiled tubing of water injection well |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108286418A CN108286418A (en) | 2018-07-17 |
| CN108286418B true CN108286418B (en) | 2024-01-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810156945.0A Active CN108286418B (en) | 2018-02-24 | 2018-02-24 | Cable connection structure and method for intelligent measuring and adjusting injection device of coiled tubing of water injection well |
Country Status (1)
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| CN109869549A (en) * | 2019-04-23 | 2019-06-11 | 中国工程物理研究院总体工程研究所 | A kind of detachable holding tube Hermetical connecting structure |
| CN113622857B (en) * | 2021-08-30 | 2022-10-21 | 江苏益马机械有限公司 | High-pressure anti-corrosion integral wellhead device |
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| CN204947554U (en) * | 2015-09-08 | 2016-01-06 | 中国石油天然气股份有限公司 | A kind of water injection well down-hole high pressure sealing cable junctions |
| CN105332677A (en) * | 2015-11-06 | 2016-02-17 | 中国石油天然气股份有限公司 | Cable direct-controlled water distribution system |
| CN105464629A (en) * | 2015-12-30 | 2016-04-06 | 上海飞舟博源石油装备技术有限公司 | Submersible diaphragm pump and composite coiled tube oil extraction system |
| CN208073405U (en) * | 2018-02-24 | 2018-11-09 | 中国石油天然气股份有限公司 | A kind of water injection well coiled tubing intelligent testing tune distributor cable connection structure |
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| CN204947554U (en) * | 2015-09-08 | 2016-01-06 | 中国石油天然气股份有限公司 | A kind of water injection well down-hole high pressure sealing cable junctions |
| CN105332677A (en) * | 2015-11-06 | 2016-02-17 | 中国石油天然气股份有限公司 | Cable direct-controlled water distribution system |
| CN105464629A (en) * | 2015-12-30 | 2016-04-06 | 上海飞舟博源石油装备技术有限公司 | Submersible diaphragm pump and composite coiled tube oil extraction system |
| CN208073405U (en) * | 2018-02-24 | 2018-11-09 | 中国石油天然气股份有限公司 | A kind of water injection well coiled tubing intelligent testing tune distributor cable connection structure |
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