CN113847508B

CN113847508B - Oil field pipe conveying anticorrosion equipment

Info

Publication number: CN113847508B
Application number: CN202110928192.2A
Authority: CN
Inventors: 夏岿阳; 夏秋月; 张广帅; 夏旭光; 翟义恒; 夏周阳; 李孟; 夏志全; 袁建国; 郑永胜
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-08-13
Filing date: 2021-08-13
Publication date: 2022-11-22
Anticipated expiration: 2041-08-13
Also published as: CN113847508A

Abstract

The invention discloses an oil field pipe conveying anti-corrosion device, which belongs to the technical field of oil field conveying devices, and is characterized in that a protective casing is arranged at the outer end of an oil field pipeline, so that the oil field pipeline and corrosive impurities can be isolated, and a plurality of adverse effects caused by medium leakage in the oil field pipeline after the oil field pipeline is subjected to corrosion perforation can be avoided.

Description

Oil field pipe conveying anticorrosion equipment

Technical Field

The invention relates to the technical field of oilfield transportation equipment, in particular to anticorrosion equipment for an oilfield transmission pipe.

Background

The sum of the reservoirs within the same hydrocarbon producing area under the control of a single geologic structure (or formation) factor. A field may have one or more reservoirs. The oil field is mainly the oil reservoir in the same area, and the gas field is mainly the gas reservoir. According to the geological factors in the area for controlling oil and gas production, oil and gas fields are divided into 3 types: (1) a structured oil and gas field. Meaning that the hydrocarbon production area is controlled by a single construction factor, such as wrinkles and faults. (2) Stratigraphic fields, the oil-bearing area of a regional anticline or monoclinic formation on the background of formation factors (e.g., unconformity, pinch-out, lithology changes, etc. of the formation). (3) A composite oil-gas field. The oil and gas producing area is not controlled by single structure or stratum factors, but controlled by multiple geological factors.

In the process of oil and gas transportation, thick oil outward transportation pipelines are generally adopted for transporting oil and gas, in order to not obstruct traffic and buildings on the ground, the pipelines are generally installed underground, and a part of the pipelines is exposed in remote areas with reduced traffic and buildings, so that the installation cost is reduced.

However, most pipelines are in a complex soil environment, and transported media are also corrosive, so that the inner wall and the outer wall of the pipeline can be corroded, once the pipeline is corroded and perforated, oil and gas leakage is caused, transportation is interrupted, the environment can be polluted, even fire can be caused, and harm is caused, and therefore the oil field pipeline anti-corrosion equipment is provided.

Disclosure of Invention

1. Technical problem to be solved

Aiming at the problems in the prior art, the invention aims to provide an oil field pipe transportation anticorrosion device, compared with the existing oil field pipe transportation, the oil field pipe transportation anticorrosion device has the advantages that through the protective sleeve arranged at the outer end of the oil field pipe, the oil field pipe transportation anticorrosion device can not only isolate external soil and corrosive impurities, but also can avoid various adverse effects caused by medium leakage in the pipe after the oil field pipe is subjected to corrosion perforation, when the protective sleeve is subjected to corrosion perforation, gas between the oil field pipe and the protective sleeve is discharged, so that the movable plug is lowered due to gravity without being supported by air pressure, and the plurality of air storage cylinders with different diameters are arranged, so that the gas conveyed for the air guide pipe after the extrusion plug is extruded is different, the rising height of the guide plug is determined according to the quantity of the conveyed gas, a worker can conveniently and quickly judge the specific position of the corrosion perforation of the protective sleeve, and simultaneously, a reminding function is triggered when the guide plug is lifted, so that people pay attention, and further repair can be quickly and timely carried out.

2. Technical scheme

In order to solve the above problems, the present invention adopts the following technical solutions.

The utility model provides an oil field defeated tub of anticorrosive equipment, the cover is equipped with protective sleeve on the oil field pipeline, a plurality of evenly distributed's of fixedly connected with sealing ring board between oil field pipeline and the protective sleeve, it is a plurality of peg graft on the sealing ring board has the gas conduction tubule, protective sleeve is located the equal fixedly connected with fixed inserting tube between per two gas conduction tubules, the ventilative section of thick bamboo of fixed inserting tube upper end fixedly connected with, the inside sliding connection of fixed inserting tube has the removal stopper, remove under the stopper lateral wall fixedly connected with balancing weight, balancing weight lower extreme fixedly connected with extrusion rod, the gas conduction tubule is located fixed inserting tube downside fixedly connected with deposits the inflator, and deposits the inflator and be linked together with the gas conduction tubule, deposit the inside sliding connection of inflator has the extrusion stopper, protective sleeve upper end fixedly connected with reminds inserting tube, remind fixedly connected with connecting pipe between the bottom of inserting tube and the gas conduction tubule, remind the inside sliding connection of inserting tube to have the guide stopper.

Further, remind a section of thick bamboo outer end cover to be equipped with magnetic force ring piece, the guide stopper all is provided with the magnetic force piece with magnetic force ring piece inside, remind to insert a section of thick bamboo and be located magnetic force ring piece top fixedly connected with stopper, remind two backup pads of inserting section of thick bamboo upper end fixedly connected with, two rotate in the backup pad and be connected with the rotation round bar, rotate the equal fixedly connected with square fixing pole in round bar both ends, two locating plates of lateral wall fixedly connected with on the magnetic force ring piece, two the relative lateral wall of locating plate is opened and is chiseled there is the spacing groove with fixed square fixing pole assorted, and fixed square fixing pole is located the spacing inslot portion, the rotation round bar is located the short section of thick bamboo of fixedly connected with between two backup pads, lateral wall fixedly connected with reminds the bell under the short section of thick bamboo of connection, can be at the in-process that the guide stopper rises, trigger the warning function of connecting the short section of thick bamboo to arouse people's attention.

Furthermore, the inner walls of the left side and the right side of the ventilating cylinder are rotatably connected with fixed rotary cylinders, a supporting brittle rod is fixedly connected between the two fixed rotary cylinders, a connecting rope is wound at the center of the supporting brittle rod, the other end of the connecting rope is fixedly connected with the movable plug, a connecting disc is fixedly connected onto one of the fixed rotary cylinders, a bolt is connected onto the ventilating cylinder in a threaded manner and contacts with the connecting disc, and the ventilating cylinder can play a role in hanging the movable plug under a normal state so as to keep the movable plug in a static state.

Furthermore, the diameters of the extrusion rods are different, the inner diameters of the gas storage cylinders are respectively matched with the diameters of the extrusion rods above the gas storage cylinders, and the specific positions of the corrosion perforation of the protective sleeve can be judged by the different characteristics of gas transmission of the gas storage cylinders with different diameters.

Further, the inside fixedly connected with sealing ring of deposit section of thick bamboo, sealing ring top fixedly connected with spring beam, the sealing ring below is provided with the ball sealer, fixedly connected with extension spring between ball sealer and the spring beam avoids the air in the air conduction tubule to get into inside the deposit section of thick bamboo, leads to other inside air stocks of deposit section of thick bamboo to change, influences the judgement that the staff corroded the perforation position to the protective casing.

Furthermore, the upper side wall of the short connecting cylinder is fixedly connected with a wind sail, so that the resistance of wind can be improved, and the wind sail can easily shake under the thrust of wind.

Furthermore, remind to insert and carve the scale mark on the section of thick bamboo lateral wall, and remind to insert a section of thick bamboo and make for transparent material, the maintenance personal of being convenient for observes and judges the perforated concrete position of protective casing corruption.

Furthermore, remind and insert a ventilative net of section of thick bamboo upper end fixedly connected with, can play and block water and dirt-proof effect, avoid external impurity to influence the rise of guide stopper.

Furthermore, the maximum bearing weight of the support brittle rod is less than the weight of the balancing weight, so that the support brittle rod can be broken under the condition that the movable plug is not supported by air pressure.

Furthermore, it has a plurality of through-holes to cut on the ventilative section of thick bamboo, the cladding of ventilative section of thick bamboo outer end has the ventilative material that blocks water of one deck, avoids removing the decline that the stopper was removed because the inside negative pressure influence of ventilative section of thick bamboo removes the stopper when descending.

3. Advantageous effects

Compared with the prior art, the invention has the advantages that:

(1) This scheme is through the protective casing pipe that sets up in oil field pipeline outer end, not only can play isolated effect to external soil and corrosivity's impurity, can also avoid receiving the corruption perforation back at oil field pipeline, a great deal of harmful effects because of intraductal medium leaks and loses and bring, when protective casing pipe receives the corruption perforation, because the atmospheric pressure that the gravity extrusion of balancing weight produced obtains discharging between oil field pipeline and the protective casing pipe, make the removal stopper do not have the support of atmospheric pressure and descend because of gravity down, utilize the gas storage section of thick bamboo of a plurality of different diameters that set up, make the extrusion stopper receive the gas of carrying for the gas conduction tubule after the extrusion also different, and determine the rise height of guide stopper through how much of conveying gas, make things convenient for the quick judgement of staff to corrode fenestrate concrete position of protective casing pipe, trigger the warning function on the guide rise simultaneously, arouse people's attention, and then can be quick, timely repair.

(2) Remind and insert a section of thick bamboo outer end cover and be equipped with magnetic force ring piece, the guide stopper all is provided with the magnetic force piece with magnetic force ring piece inside, remind to insert a section of thick bamboo and be located magnetic force ring piece top fixedly connected with stopper, remind two backup pads of inserting section of thick bamboo upper end fixedly connected with, it is connected with the rotation round bar to rotate in two backup pads, the equal fixedly connected with square pole in rotation round bar both ends, two locating plates of lateral wall fixedly connected with on the magnetic force ring piece, the relative lateral wall of two locating plates is opened chisel have with fixed square pole assorted spacing groove, and fixed square pole is located the spacing inslot, it is located the short section of thick bamboo of fixedly connected with between two backup pads to rotate the round bar, connect the short section of thick bamboo downside wall fixedly connected with and remind the bell, can be at the in-process that the guide stopper rises, trigger the warning function of connecting the short section of thick bamboo, so that arouse people's attention.

(3) The inner walls of the left side and the right side of the ventilating cylinder are rotatably connected with fixed rotary cylinders, the brittle rods are fixedly connected between the two fixed rotary cylinders and supported, the centers of the supported brittle rods are connected with connecting ropes in a winding mode, the other ends of the connecting ropes are fixedly connected with the movable plug, one of the fixed rotary cylinders is fixedly connected with a connecting disc, the ventilating cylinder is provided with a bolt in a threaded connection mode, the bolt is in contact with the connecting disc, the movable plug can be suspended in a normal state, and accordingly the static state of the movable plug is kept.

(4) The diameters of all the extrusion rods are different, the inner diameters of the gas storage cylinders are respectively matched with the diameters of the extrusion rods above the gas storage cylinders, and the specific positions of corrosion perforation of the protective casing pipe can be judged by the characteristics that the gas storage cylinders with different diameters transmit gas and are different.

(5) The inside fixedly connected with sealing ring of air storage cylinder, sealing ring top fixedly connected with spring beam, the sealing ring below is provided with the ball sealer, fixedly connected with extension spring between ball sealer and the spring beam, avoids the air in the air conduction tubule to get into inside the air storage cylinder, leads to other air stocks inside the air storage cylinder to change, influences the staff to the judgement in lag tube corruption perforation position.

(6) The upper side wall of the connecting short cylinder is fixedly connected with the wind sail, so that the resistance of wind can be improved, and the wind sail can easily shake under the thrust of wind.

(7) The reminding is carved with the scale mark on the side wall of the inserting barrel, and the reminding inserting barrel is made of transparent materials, so that maintenance personnel can observe and judge the specific position of the corrosion perforation of the protective casing.

(8) Remind and insert a section of thick bamboo upper end fixedly connected with ventilative net, can play and block water and dirt-proof effect, avoid external impurity to influence the rise of guide stopper.

(9) The maximum bearing weight of the support brittle rod is less than the weight of the balancing weight, and the support brittle rod can break under the condition that the movable plug is not supported by air pressure.

(10) A plurality of through holes are drilled in the ventilating cylinder, the outer end of the ventilating cylinder is coated with a layer of ventilating water blocking material, and the problem that the movable plug moves due to the influence of negative pressure inside the ventilating cylinder when the movable plug descends is avoided.

Drawings

FIG. 1 is a schematic external view of the present invention;

FIG. 2 is a schematic front view of the present invention;

FIG. 3 is an enlarged view taken at A in FIG. 2;

FIG. 4 is an enlarged view at B in FIG. 3;

FIG. 5 is an enlarged view at C of FIG. 2;

FIG. 6 is a schematic structural view of a reminder insert cartridge according to the present invention;

FIG. 7 is a diagram of the protective sleeve of the present invention after it has been pierced by corrosion;

fig. 8 is a state diagram when the guide member of the present invention is raised.

The numbering in the figures illustrates:

1 oil field pipeline, 2 protective sleeve, 3 sealing ring plate, 4 gas guide tube, 5 fixed inserting cylinder, 51 ventilating cylinder, 511 fixed rotating cylinder, 512 supporting brittle rod, 513 connecting rope, 514 connecting disc, 515 bolt, 52 moving plug, 53 balancing weight, 54 extruding rod, 6 gas storage cylinder, 61 sealing ring, 62 spring rod, 63 sealing ball, 64 extruding plug, 65 stretching spring, 7 reminding inserting cylinder, 71 connecting tube, 72 guiding plug, 73 magnetic ring block, 74 magnetic block, 75 limiting block, 81 supporting plate, 82 rotating round rod, 83 fixed square rod, 84 positioning plate, 85 connecting short cylinder, 86 wind sail, 87 reminding bell and 88 ventilating net.

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 obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1:

referring to fig. 1-4, an oil field pipe anticorrosion apparatus comprises an oil field pipe 1, a protective casing 2 is sleeved on the oil field pipe 1, a plurality of uniformly distributed sealing ring plates 3 are fixedly connected between the oil field pipe 1 and the protective casing 2, the sealing ring plates 3 are bonded with the oil field pipe 1 by sealant, so as to achieve good sealing effect, a plurality of sealing ring plates 3 are inserted with gas guide tubes 4, a fixed inserting tube 5 is fixedly connected between every two gas guide tubes 4 of the protective casing 2, a gas permeable tube 51 is fixedly connected with the upper end of the fixed inserting tube 5, a movable plug 52 is slidably connected inside the fixed inserting tube 5, a counter weight 53 is fixedly connected with the lower side wall of the movable plug 52, an extrusion rod 54 is fixedly connected with the lower end of the counter weight 53, a gas storage tube 6 is fixedly connected with the lower side of the fixed inserting tube 5, the gas storage tube 6 is communicated with the gas guide tubes 4, an extrusion plug 64 is slidably connected inside the gas storage tube 6, the upper end of the protective sleeve 2 is fixedly connected with a reminding inserting cylinder 7, the protective sleeve 2 provided with the reminding inserting cylinder 7 is positioned on one section of the ground, and is convenient for workers to check, a connecting pipe 71 is fixedly connected between the bottom end of the reminding inserting cylinder 7 and the air guide tube 4, a guide plug 72 is slidably connected inside the reminding inserting cylinder 7, when the protective sleeve 2 is corroded and perforated, air pressure generated between the oilfield pipeline 1 and the protective sleeve 2 due to gravity extrusion of a balancing weight 53 is discharged, so that the movable plug 52 descends due to gravity without being supported by the air pressure, the inner walls of the left side and the right side of the air permeable cylinder 51 are rotatably connected with fixed rotary cylinders 511, a support brittle rod 512 is fixedly connected between the two fixed rotary cylinders 511, a connecting rope 513 is wound at the center of the support brittle rod 512, the other end of the connecting rope 513 is fixedly connected with the movable plug 52, and a connecting disc 514 is fixedly connected on one fixed rotary cylinder 511, the vent cylinder 51 is connected with a bolt 515 through threads, the bolt 515 is in contact with the connecting disc 514, the maximum bearing weight of the support brittle rod 512 is smaller than the weight of the balancing weight 53, the movable plug 52 is supported under the condition that air pressure does not exist, the support brittle rod 512 is broken due to the fact that the weight of the balancing weight 53 cannot be supported, referring to fig. 7, the balancing weight 53 continues to move downwards, and the extrusion rod 54 is driven to extrude the extrusion plug 64.

Referring to fig. 1 and 4, the diameters of the extrusion rods 54 are different, the inner diameters of the plurality of gas storage cylinders 6 are respectively matched with the diameters of the extrusion rods 54 above the gas storage cylinders 6, the diameters of the gas storage cylinders 6 are different, so that the gas transmitted to the gas guide tube 4 by the gas storage cylinders 6 is also different, the guide plug 72 is driven by the gas to move upwards, scale marks are carved on the side wall of the reminding plug tube 7, the reminding plug tube 7 is made of a transparent material, and at the moment, a worker can calculate the ascending height of the guide plug 72 through the scale marks, so that the specific position of the corrosion perforation of the protective sleeve 2 is deduced.

Referring to fig. 5-6, the outer end of the reminding insertion cylinder 7 is sleeved with a magnetic ring block 73, magnetic blocks 74 are arranged inside the guiding plug 72 and the magnetic ring block 73, the reminding insertion cylinder 7 is located above the magnetic ring block 73 and fixedly connected with a limiting block 75, the upper end of the reminding insertion cylinder 7 is fixedly connected with two supporting plates 81, the two supporting plates 81 are rotatably connected with a rotating round rod 82, two ends of the rotating round rod 82 are fixedly connected with fixed square rods 83, two positioning plates 84 are fixedly connected with the upper side wall of the magnetic ring block 73, a limiting groove matched with the fixed square rods 83 is formed in one side wall of the two positioning plates 84 opposite to the one side wall, the fixed square rods 83 are located inside the limiting groove, the rotating round rod 82 is located between the two supporting plates 81 and fixedly connected with a short cylinder 85, the lower side wall of the short cylinder 85 is fixedly connected with a reminding bell 87, in a normal state, the magnetic ring block 73 and the guiding plug 72 can play a fixing role in the magnetic ring block 73 through the magnetic block 74 in the guiding plug 72 and the magnetic ring block 73, when the guiding plug 72 rises, the magnetic ring block 73 can make the magnetic ring block 73 and the magnetic ring block 73 swing to make a wind force generated by the wind force generated by pulling the limiting block 85, so that a person can swing the short cylinder 85, and the wind blowing fan 85, and the short cylinder 85 can swing, and the short cylinder 85, and the short cylinder can swing to cause the wind to swing, and the short cylinder to swing.

Referring to fig. 3-4, a sealing ring 61 is fixedly connected inside the air storage cylinder 6, a spring rod 62 is fixedly connected above the sealing ring 61, a sealing ball 63 is arranged below the sealing ring 61, and an extension spring 65 is fixedly connected between the sealing ball 63 and the spring rod 62, so that the situation that air inside the air guide tube 4 enters the air storage cylinder 6 to cause the change of air storage inside other air storage cylinders 6 and influence the judgment of the worker on the corrosion perforation position of the protective sleeve 2 can be avoided.

Referring to fig. 6, the ventilation net 88 is fixedly connected to the upper end of the reminding insertion cylinder 7, so that water blocking and dust preventing effects can be achieved, and the rising height of the guide plug 72 is prevented from being influenced by external impurities.

Referring to fig. 3, a plurality of through holes are drilled on the ventilation cylinder 51, and a layer of ventilation water-blocking material is coated on the outer end of the ventilation cylinder 51 to prevent the movable plug 52 from falling due to the negative pressure inside the ventilation cylinder 51 when the movable plug 52 falls.

The foregoing is only a preferred embodiment of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should also be able to cover the technical scope of the present invention by the equivalent or modified embodiments and the modified concepts of the present invention.

Claims

1. The utility model provides an oil field defeated pipe anticorrosion equipment, includes oil field pipeline (1), its characterized in that: the oil field pipeline (1) is sleeved with a protective sleeve (2), a plurality of uniformly distributed sealing ring plates (3) are fixedly connected between the oil field pipeline (1) and the protective sleeve (2), a plurality of air guide tubes (4) are inserted into the sealing ring plates (3), a fixed inserting tube (5) is fixedly connected between every two air guide tubes (4) of the protective sleeve (2), the upper end of the fixed inserting tube (5) is fixedly connected with a ventilating tube (51), a moving plug (52) is slidably connected inside the fixed inserting tube (5), the lower side wall of the moving plug (52) is fixedly connected with a balancing weight (53), the lower end of the balancing weight (53) is fixedly connected with an extruding rod (54), the air guide tubes (4) are fixedly connected to the lower side of the fixed inserting tube (5), the air storage tube (6) is communicated with the air guide tubes (4), the extruding plug (64) is slidably connected inside the air storage tube (6), the upper end of the protective sleeve (2) is fixedly connected with a reminding inserting tube (7), the bottom end of the reminding inserting tube (7) is fixedly connected with the fixed inserting tube (4), and the guiding plug (71) is connected with the sliding plug (72);

the diameters of the extrusion rods (54) are different, and the inner diameters of the gas storage cylinders (6) are respectively matched with the diameters of the extrusion rods (54) above the gas storage cylinders.

2. The oilfield pipe conveying corrosion prevention device of claim 1, wherein: remind outer end cover of inserting a section of thick bamboo (7) to be equipped with magnetic ring piece (73), guide stopper (72) and magnetic ring piece (73) inside all is provided with magnetic block (74), it is located magnetic ring piece (73) top fixedly connected with stopper (75) to remind inserting a section of thick bamboo (7), remind two backup pad (81) of fixedly connected with in upper end of inserting a section of thick bamboo (7), two rotate on backup pad (81) and be connected with rotation round bar (82), rotate equal fixedly connected with square fixing pole (83) in round bar (82) both ends, two locating plate (84) of side wall fixedly connected with on magnetic ring piece (73), two the relative lateral wall of locating plate (84) is opened the chisel and is had and fix square fixing pole (83) assorted spacing groove, and fixed square fixing pole (83) are located the spacing inslot portion, it is located fixedly connected with between two backup pads (81) and connects stub (85) to rotate round bar (82), it reminds bell (87) to connect stub fixedly connected with side wall under stub (85).

3. The oilfield pipe conveying corrosion prevention device of claim 1, wherein: ventilative section of thick bamboo (51) left and right sides inner wall all rotates and is connected with fixed rotary drum (511), two fixedly connected with supports crisp stick (512) between fixed rotary drum (511), support crisp stick (512) center department round joint has connection rope (513), connect rope (513) other end and removal stopper (52) fixed connection, one of them fixedly connected with connection pad (514) on fixed rotary drum (511), threaded connection has bolt (515) on ventilative section of thick bamboo (51), and bolt (515) contact with connection pad (514).

4. The oilfield pipe conveying corrosion prevention device of claim 1, wherein: the inner part of the air storage cylinder (6) is fixedly connected with a sealing ring (61), a spring rod (62) is fixedly connected to the upper part of the sealing ring (61), a sealing ball (63) is arranged below the sealing ring (61), and an extension spring (65) is fixedly connected between the sealing ball (63) and the spring rod (62).

5. The oilfield pipe conveying corrosion prevention device of claim 2, wherein: the upper side wall of the connecting short cylinder (85) is fixedly connected with a wind sail (86).

6. The oilfield pipe conveying corrosion prevention device of claim 1, wherein: the side wall of the reminding inserting cylinder (7) is carved with scale lines, and the reminding inserting cylinder (7) is made of transparent materials.

7. The oilfield pipe conveying corrosion prevention device of claim 1, wherein: the upper end of the reminding inserting cylinder (7) is fixedly connected with a breathable net (88).

8. The oilfield pipe conveying corrosion prevention device of claim 3, wherein: the maximum bearing weight of the support brittle rods (512) is less than that of the balancing weight (53).

9. The oilfield pipe conveying corrosion prevention device of claim 1, wherein: a plurality of through holes are drilled in the ventilating cylinder (51), and the outer end of the ventilating cylinder (51) is coated with a layer of ventilating water-blocking material.