CN114231991B - Cathode protection device for protecting inner wall of oil pipe and casing - Google Patents
Cathode protection device for protecting inner wall of oil pipe and casing Download PDFInfo
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- CN114231991B CN114231991B CN202111583400.6A CN202111583400A CN114231991B CN 114231991 B CN114231991 B CN 114231991B CN 202111583400 A CN202111583400 A CN 202111583400A CN 114231991 B CN114231991 B CN 114231991B
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- 239000004020 conductor Substances 0.000 claims abstract description 5
- 230000007246 mechanism Effects 0.000 claims description 12
- 238000004210 cathodic protection Methods 0.000 claims description 8
- 238000009434 installation Methods 0.000 abstract description 9
- 238000011900 installation process Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 239000003129 oil well Substances 0.000 description 11
- 238000002347 injection Methods 0.000 description 10
- 239000007924 injection Substances 0.000 description 10
- 230000007797 corrosion Effects 0.000 description 7
- 238000005260 corrosion Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 241000276425 Xiphophorus maculatus Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 206010020718 hyperplasia Diseases 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
- C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
- C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
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- 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
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/02—Equipment or details not covered by groups E21B15/00 - E21B40/00 in situ inhibition of corrosion in boreholes or wells
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F2213/00—Aspects of inhibiting corrosion of metals by anodic or cathodic protection
- C23F2213/30—Anodic or cathodic protection specially adapted for a specific object
- C23F2213/32—Pipes
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Prevention Of Electric Corrosion (AREA)
Abstract
The invention discloses a cathode protection device for protecting an oil pipe and the inner wall of a casing, which comprises a short joint, wherein a casing conductor is arranged on the outer wall of the short joint, an annular inner groove is formed in the inner wall of the short joint, two L-shaped grooves are formed in the inner wall of the short joint, the upper ends of the L-shaped grooves are positioned at the end part of the short joint, L-shaped pull rods are arranged in the two L-shaped grooves, the upper ends of the L-shaped pull rods are lower than the end part of the L-shaped groove, an in-pipe sacrificial anode is arranged in the annular inner groove, the two L-shaped pull rods are fixedly connected with the upper end of the in-pipe sacrificial anode, the in-pipe sacrificial anode is in a plate shape, a first bulge and a second bulge are respectively arranged at two ends of the in-pipe sacrificial anode, and the first bulge is matched with the second bulge. The invention not only facilitates the installation of the sacrificial anode outside the pipe and the sacrificial anode inside the pipe, but also has quicker and more convenient installation process, better and more sufficient stability after installation, and does not need to build a mould for pouring and the disassembly work of the mould.
Description
Technical Field
The invention relates to the technical field of corrosion prevention of oil field production systems, in particular to a cathode protection device for protecting the inner walls of oil pipes and sleeves.
Background
In an oil field production system, the water content of oil well output liquid is continuously increased along with the extension of oil field development time, and because the mineralization degree of the output liquid separation water is high, a large amount of carbon dioxide and hydrogen sulfide are contained, and a certain amount of bacteria cause that the output liquid medium severely corrodes the inner walls of an oil well oil pipe and a sleeve; the water injection well then derives from the oil well because its sewage that injects into, and sewage has the corrosivity the same with the oil well, and the in-process of injecting into sewage causes serious corruption to water injection well oil pipe inner wall, simultaneously, because the water injection well annular space is a stagnant water district, the reproduction of bacterium is more serious than the oil well with the hyperplasia, leads to water injection well annular space's quality of water to worsen, causes serious corruption to the outer wall of oil pipe, sheathed tube inner wall.
At present, the sacrificial anode protection technology adopted for controlling the corrosion of oil casings of oil wells and water injection wells cannot protect the inner walls of oil pipes of the oil wells or the water injection wells, cannot protect the inner walls of the casings of the oil wells or the water injection wells, and only can protect the outer walls of the oil pipes. Therefore, in the production process of the oil field, the corrosion in the oil pipe causes the perforation and the breaking of the oil pipe, the corrosion on the inner wall of the casing causes the reduction of the strength of the casing, the deformation and the breaking of the casing and the perforation of the casing, the operation and the overhaul and even the scrapping of the oil well and the water injection well are caused, the economic loss is great, the normal operation of the production of the oil field is influenced, the yield of crude oil in the oil field is reduced, the economic benefit is reduced, and the like.
The prior art discloses a cathode protection device for protecting the inner walls of an oil pipe and a sleeve with the application number of CN201420457381.1, wherein a plurality of sleeve conductors are respectively arranged in the middle or in the middle of a short circuit and at one end of the short circuit; the external sacrificial anode is poured on the short-connected pipe wall and is positioned at two ends of the sleeve conductive device or between two groups of sleeve conductive devices; the sacrificial anode in the pipe is poured outside the short-circuited pipe and positioned between the two groups of sacrificial anodes outside the pipe or at the other end of the one group of sacrificial anodes outside the pipe; the screw threads are positioned at two ends of the short circuit; the method solves the problem that the sacrificial anode protection technology adopted for controlling the corrosion of the inner walls of the oil well, the oil pipe and the casing of the water injection well under the current conditions can not protect the inner walls of the oil pipe and the casing, expands the range of the sacrificial anode protection technology for controlling the corrosion of the oil pipe and the casing of the oil well, the water injection well, the oil pipe and the casing, ensures that the corrosion control of the oil casing can be more comprehensively and effectively protected, reduces the corrosion damage of the oil production process to the oil casing, and provides technical guarantee for the sustainable development of the oil field and the improvement of the economic benefit.
The above patent weak point lies in, it accomplishes the installation to outer sacrificial anode of pipe, intraductal sacrificial anode through the form of pouring, needs corresponding mould, and to operations such as the installation of mould simultaneously, whole process is comparatively loaded down with trivial details lengthy, work efficiency is low.
Therefore, we have designed a cathodic protection device for protecting the inner wall of oil pipe and casing to solve the above problems.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a cathode protection device for protecting the inner walls of an oil pipe and a sleeve, which is convenient for mounting an outer sacrificial anode and an inner sacrificial anode inside the pipe, is quicker and more convenient in the mounting process, has better and more sufficient stability after mounting, and does not need to build a mold for pouring and the disassembly work of the mold.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a protection oil pipe, intraductal wall of sleeve's cathodic protection device, includes the short circuit, the sleeve pipe electric conductor is installed to the outer wall of short circuit, the inner wall of short circuit is equipped with annular inside groove, the inner wall of short circuit is equipped with two L type grooves, the upper end in L type groove is located the tip of short circuit, two L type inslot all is equipped with L type pull rod, the upper end of L type pull rod is less than the tip in L type groove, install intraductal sacrificial anode, two in the annular inside groove L type pull rod all with the upper end fixed connection of intraductal sacrificial anode, intraductal sacrificial anode is platelike, just the both ends of intraductal sacrificial anode are equipped with first arch and second arch respectively, first arch and the protruding phase-match of second, just first arch and second arch are connected through a plurality of coupling mechanisms, the outer wall of short circuit is equipped with annular outside groove, install the extratubal sacrificial anode that is platelike setting in the annular outside the groove, sacrificial anode is connected with annular outside the pipe through a plurality of coupling mechanisms.
Preferably, the thickness of the sacrificial anode within the tube is the same as the depth of the annular inner groove.
Preferably, coupling mechanism is including setting up the recess on the protruding outer wall of second, sliding connection has the connecting block in the recess, fixedly connected with inserts the post on the connecting block, insert the post run through the second arch and rather than sliding connection, the outside cover of inserting the post is equipped with first spring, first spring does not offset with inserting the post, just the both ends of first spring respectively with the inner wall fixed connection of connecting block, recess, be equipped with on the first arch and insert post assorted draw-in groove.
Preferably, the outer wall of the second protrusion is provided with a bump, the end of the sacrificial anode in the tube is provided with an arc-shaped groove, and the arc-shaped groove is matched with the bump.
Preferably, the thickness of the sacrificial anode outside the tube is greater than the depth of the annular outer groove.
Preferably, latch mechanism is including setting up the guide way on the sacrificial anode outside the tubes, sliding connection has the rectangular block in the guide way, the inner wall of annular outer tank is equipped with the spacing groove, the rectangular block inserts the spacing inslot, the outer wall of sacrificial anode outside the tubes is equipped with the circular recess, the circular recess passes through thread groove and guide way and communicates mutually, be equipped with the round block in the circular recess, fixedly connected with screw rod on the round block, the screw rod run through thread groove and rather than threaded connection, the other end fixedly connected with round platform piece of screw rod, round platform piece offsets with the rectangular block, be equipped with stop gear between rectangular block and the spacing groove.
Preferably, the rectangular block is provided with an inclined surface, and the inclined surface is matched with the circular truncated cone block.
Preferably, stop gear is including the side groove that is located the spacing inslot wall, sliding connection has the slider in the side groove, slider and rectangular block fixed connection, just fixedly connected with second spring between slider and the side groove.
Compared with the prior art, the invention has the beneficial effects that:
1. the L-shaped pull rod is arranged in the L-shaped groove, and the sacrificial anode in the pipe is opposite to the annular inner groove, so that the sacrificial anode in the pipe can be quickly arranged in the annular inner groove.
2. Inflating and expanding the air bag so as to prop open the sacrificial anode in the pipe and abut against the inner wall of the annular inner groove; the inserting column abuts against the sacrificial anode in the pipe, the first bulge and the second bulge are finally buckled and abutted under the extrusion of the air bag along with the expansion of the sacrificial anode in the pipe, the inserting column is inserted into the clamping groove at the moment, and the convex block is arranged in the arc-shaped groove; under the cooperation of the inserting column, the clamping groove, the convex block, the arc-shaped groove and the annular inner groove, the sacrificial anode in the tube can be stably installed in the annular inner groove, and the method is simple, quick and sufficient in stability.
3. When the sacrificial anode outside the tube is installed, the sacrificial anode outside the tube is sleeved in the annular outer groove, then the round block is rotated through the plum blossom screwdriver, so that the screw rod can be driven to rotate and the round block is driven to move, the round block moves to start the inclined plane, the rectangular block moves, and finally the rectangular block is clamped in the limiting groove, so that the sacrificial anode outside the tube is installed simply and quickly.
In conclusion, the external sacrificial anode and the internal sacrificial anode can be conveniently installed, the installation process is quicker and more convenient, the stability after installation is better and more sufficient, and the die pouring and the die dismounting are not required to be built.
Drawings
FIG. 1 is a schematic structural diagram of a cathodic protection device for protecting the inner wall of an oil pipe and a casing according to the present invention;
FIG. 2 is a top view of the sacrificial anode inside the tube in the cathodic protection device for protecting the inner wall of the oil tube and the casing according to the present invention;
FIG. 3 is a schematic structural diagram of the position A in the cathode protection device for protecting the inner wall of the oil pipe and the casing according to the present invention;
fig. 4 is a schematic structural diagram of a position B in the cathode protection device for protecting the inner wall of the oil pipe and the casing according to the present invention.
In the figure: 1 short circuit, 2L type groove, 3 annular inside groove, 4 intraductal sacrificial anodes, 5L type pull rod, 6 sleeve pipe electric conduction ware, 7 latch mechanism, 8 first arch, 9 draw-in groove, 10 arc-shaped groove, 11 second arch, 12 lugs, 13 recess, 14 inserted posts, 15 first spring, 16 connecting block, 17 annular outer groove, 18 extratubal sacrificial anodes, 19 guide way, 20 circular slot, 21 circle piece, 22 screw rod, 23 thread groove, 24 round platform piece, 25 inclined plane, 26 rectangular block, 27 spacing groove, 28 second spring, 29 side groove, 30 slider.
Detailed Description
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.
Referring to fig. 1-4, a cathode protection device for protecting an oil pipe and an inner wall of a casing comprises a short circuit 1, a casing conductor 6 is installed on the outer wall of the short circuit 1, an annular inner groove 3 is formed in the inner wall of the short circuit 1, the upper ends of two L-shaped grooves 2,L type grooves 2 are formed in the inner wall of the short circuit 1 and located at the end part of the short circuit 1, L-shaped pull rods 5,L type pull rods 5 are arranged in the two L-shaped grooves 2, the upper ends of the L-shaped pull rods 5,L type pull rods 5 are lower than the end part of the L-shaped grooves 2, the L-shaped pull rods 5 can be matched with the L-shaped grooves 2 to limit sacrificial anodes 4 in the pipe, when the L-shaped pull rods 5 are installed in the L-shaped grooves 2, the sacrificial anodes 4 in the pipe are just opposite to the annular inner groove 3, and therefore the installation efficiency of the sacrificial anodes 4 in the pipe can be improved; wherein, L type pull rod 5 is kept away from first arch 8 and the protruding 11 setting of second, can be close to intraductal sacrificial anode 4's middle part setting, so can reduce L type pull rod 5's deformation, make it not fragile.
A sacrificial anode 4 in the pipe is arranged in the annular inner groove 3, and the thickness of the sacrificial anode 4 in the pipe is the same as the depth of the annular inner groove 3; two L type pull rods 5 all with intraductal sacrificial anode 4's upper end fixed connection, intraductal sacrificial anode 4 is platelike, and the both ends of intraductal sacrificial anode 4 are equipped with first arch 8 and the protruding 11 of second respectively, first arch 8 and the protruding 11 phase-matches of second, wherein, the outer wall of the protruding 11 of second is equipped with lug 12, the tip of intraductal sacrificial anode 4 is equipped with arc wall 10, arc wall 10 and lug 12 phase-matches, lug 12 is the block rubber, can so that be annular intraductal sacrificial anode 4 can not separate.
The first bulge 8 and the second bulge 11 are connected through a plurality of connecting mechanisms, each connecting mechanism comprises a groove 13 formed in the outer wall of the corresponding second bulge 11, each groove 13 is connected with a connecting block 16 in a sliding mode, each connecting block 16 is fixedly connected with an inserting column 14, each inserting column 14 penetrates through the corresponding second bulge 11 and is connected with the corresponding second bulge in a sliding mode, a first spring 15 is sleeved outside each inserting column 14, each first spring 15 does not abut against the corresponding inserting column 14, two ends of each first spring 15 are fixedly connected with the corresponding connecting block 16 and the inner wall of the corresponding groove 13, and a clamping groove 9 matched with the corresponding inserting column 14 is formed in each first bulge 8; connecting block 16 under the normal condition is located recess 13, then insert the protruding second arch 11 setting of post 14, it needs to be noted that, need remove first arch 8 to the inboard of second arch 11 during the installation, so, insert post 14 and just can install in draw-in groove 9, simultaneously, first arch 8 produces outside elasticity, then second arch 11 produces inside elasticity, so can be with inserting post 14 and the tight knot of draw-in groove 9 together, can not separate.
The outer wall of the short circuit 1 is provided with an annular outer groove 17, a platy outer tube sacrificial anode 18 is arranged in the annular outer groove 17, and the thickness of the outer tube sacrificial anode 18 is larger than the depth of the annular outer groove 17.
The external sacrificial anode 18 of the pipe is connected with the annular outer groove 17 through a plurality of clamping mechanisms 7, each clamping mechanism 7 comprises a guide groove 19 arranged on the external sacrificial anode 18 of the pipe, a rectangular block 26 is connected in the guide groove 19 in a sliding mode, a limiting groove 27 is formed in the inner wall of the annular outer groove 17, the rectangular block 26 is inserted into the limiting groove 27, a circular groove 20 is formed in the outer wall of the external sacrificial anode 18 of the pipe, the circular groove 20 is communicated with the guide groove 19 through a threaded groove 23, a round block 21 is arranged in the circular groove 20, a screw 22 is fixedly connected to the round block 21, the screw 22 penetrates through the threaded groove 23 and is in threaded connection with the threaded groove, a round block 24 is fixedly connected to the other end of the screw 22, the round block 24 abuts against the rectangular block 26, an inclined surface 25 is formed in the rectangular block 26, and the inclined surface 25 is matched with the round block 24; through set up guide way 19 at the inside lateral wall of annular groove annular outer groove 17, so can not be to short circuit 1 thickness square production influence, and the installation back stability is sufficient.
Be equipped with stop gear between rectangular block 26 and the spacing groove 27, stop gear is including the side channel 29 that is located the spacing groove 27 inner wall, and sliding connection has slider 30 in the side channel 29, slider 30 and rectangular block 26 fixed connection, and fixedly connected with second spring 28 between slider 30 and the side channel 29.
When the sacrificial anode 4 in the tube is installed, the L-shaped pull rod 5 is installed in the L-shaped groove 2, the sacrificial anode 4 in the tube is opposite to the annular inner groove 3, the plan view of the sacrificial anode 4 in the tube is shown in fig. 2, and it needs to be noted that the first bulge 8 needs to be moved to the inner side of the second bulge 11 during installation, so that the inserted column 14 can be installed in the clamping groove 9, meanwhile, the first bulge 8 generates outward elasticity, and the second bulge 11 generates inward elasticity, so that the inserted column 14 and the clamping groove 9 can be tightly buckled together and cannot be separated;
then, the worker uses an air bag (not shown in the figure) to inflate and expand the air bag, so that the sacrificial anode 4 in the pipe can be propped open and is abutted against the inner wall of the annular inner groove 3; the inserting column 14 abuts against the sacrificial anode 4 in the tube, the first bulge 8 and the second bulge 11 are finally buckled and abutted under the extrusion of the air bag along with the expansion of the sacrificial anode 4 in the tube, the inserting column 14 is inserted into the clamping groove 9 at the moment, and the convex block 12 is arranged in the arc-shaped groove 10; under the matching of the inserted columns 14, the clamping grooves 9, the convex blocks 12, the arc-shaped grooves 10 and the annular inner grooves 3, the sacrificial anode 4 in the tube can be stably arranged in the annular inner grooves 3, and the device is simple, quick and stable;
when the sacrificial anode 18 outside the tube is installed, the sacrificial anode 18 outside the tube is sleeved in the annular outer groove 17, then the round block 21 is rotated through the plum blossom screwdriver, so that the screw 22 can be driven to rotate and the round table block 24 is driven to move, the round table block 24 moves the starting inclined plane 25 and the rectangular block 26 moves, and finally the rectangular block 26 is clamped in the limiting groove 27, so that the sacrificial anode 18 outside the tube is installed simply and quickly.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (4)
1. The utility model provides a cathodic protection device of protection oil pipe, sleeve pipe inner wall, includes short circuit (1), sleeve pipe conductor (6) are installed to the outer wall of short circuit (1), its characterized in that, the inner wall of short circuit (1) is equipped with annular inside groove (3), the inner wall of short circuit (1) is equipped with two L type groove (2), the upper end in L type groove (2) is located the tip of short circuit (1), two all be equipped with L type pull rod (5) in L type groove (2), the upper end of L type pull rod (5) is less than the tip of L type groove (2), install intraductal sacrificial anode (4) in annular inside groove (3), two L type pull rod (5) all with the upper end fixed connection of intraductal sacrificial anode (4), intraductal sacrificial anode (4) is platelike, just the both ends of intraductal sacrificial anode (4) are equipped with first arch (8) and second arch (11) respectively, first arch (8) and second arch (11) phase-match, just first arch (8) and second arch (11) are through a plurality of connection mechanisms, the outer wall of the sacrificial anode (17) is equipped with annular outer wall (17) and the outer sacrificial anode (17) is connected outside the annular groove (17), the connecting mechanism comprises a groove (13) arranged on the outer wall of the second bulge (11), a connecting block (16) is connected in the groove (13) in a sliding manner, a plug column (14) is fixedly connected to the connecting block (16), the plug column (14) penetrates through the second bulge (11) and is connected with the second bulge in a sliding manner, a first spring (15) is sleeved outside the plug column (14), the first spring (15) does not abut against the plug column (14), the two ends of the first spring (15) are respectively connected with the connecting block (16) and the groove (13) in a sliding manner, a clamping groove (9) matched with the plug column (14) is arranged on the first bulge (8), the clamping mechanism (7) comprises a guide groove (19) arranged on the outer sacrificial anode (18) of the tube, a rectangular block (26) is connected in the guide groove (19), the inner wall of the outer annular groove (17) is provided with a limiting groove (27), the rectangular block (26) is inserted into the limiting groove (27), the outer wall of the sacrificial anode (18) is provided with a circular groove (20), the circular groove (21) is communicated with a screw rod (21) through the guide groove (20), screw rod (22) run through thread groove (23) and rather than threaded connection, the other end fixedly connected with round platform piece (24) of screw rod (22), round platform piece (24) offset with rectangular block (26), be equipped with stop gear between rectangular block (26) and spacing groove (27), be equipped with inclined plane (25) on rectangular block (26), inclined plane (25) and round platform piece (24) phase-match, stop gear is including side groove (29) that are located spacing groove (27) inner wall, sliding connection has slider (30) in side groove (29), slider (30) and rectangular block (26) fixed connection, just fixedly connected with second spring (28) between slider (30) and side groove (29).
2. The cathodic protection device for protecting the inner wall of oil pipe and casing according to claim 1, wherein the thickness of the sacrificial anode (4) inside the pipe is the same as the depth of the annular inner groove (3).
3. The cathodic protection device for protecting the inner wall of oil pipe and casing according to claim 1, wherein the outer wall of the second protrusion (11) is provided with a bump (12), the end of the sacrificial anode (4) in the pipe is provided with an arc-shaped groove (10), and the arc-shaped groove (10) is matched with the bump (12).
4. The cathodic protection device for protecting the inner wall of oil pipe and casing according to claim 1, wherein the thickness of the sacrificial anode (18) outside the pipe is greater than the depth of the annular outer groove (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111583400.6A CN114231991B (en) | 2021-12-22 | 2021-12-22 | Cathode protection device for protecting inner wall of oil pipe and casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111583400.6A CN114231991B (en) | 2021-12-22 | 2021-12-22 | Cathode protection device for protecting inner wall of oil pipe and casing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114231991A CN114231991A (en) | 2022-03-25 |
| CN114231991B true CN114231991B (en) | 2022-10-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111583400.6A Active CN114231991B (en) | 2021-12-22 | 2021-12-22 | Cathode protection device for protecting inner wall of oil pipe and casing |
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Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7998321B1 (en) * | 2009-07-27 | 2011-08-16 | Roberto Giorgini | Galvanic anode for reinforced concrete applications |
| CN104265186B (en) * | 2014-08-13 | 2016-06-08 | 西安石油大学 | A kind of protect oil pipe, the cathode protection device of internal surface of sleeve pipe and manufacture method |
| CN209619459U (en) * | 2019-03-05 | 2019-11-12 | 焦作市益瑞合金材料有限公司 | A kind of sacrificial anode device of casing tube anti-corrosive erosion Mulit-point Connection |
| CN210736893U (en) * | 2019-11-25 | 2020-06-12 | 焦作市益瑞合金材料有限公司 | Sacrificial anode device for protecting oil well casing |
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| CN114231991A (en) | 2022-03-25 |
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