CN111577155B - Functional alloy pipe column corrosion protector - Google Patents
Functional alloy pipe column corrosion protector Download PDFInfo
- Publication number
- CN111577155B CN111577155B CN202010450764.6A CN202010450764A CN111577155B CN 111577155 B CN111577155 B CN 111577155B CN 202010450764 A CN202010450764 A CN 202010450764A CN 111577155 B CN111577155 B CN 111577155B
- Authority
- CN
- China
- Prior art keywords
- functional alloy
- pipe
- auxiliary section
- functional
- alloy layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000000956 alloy Substances 0.000 title claims abstract description 96
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 64
- 230000001012 protector Effects 0.000 title claims abstract description 33
- 238000005260 corrosion Methods 0.000 title claims abstract description 21
- 230000007797 corrosion Effects 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 36
- 239000007788 liquid Substances 0.000 claims abstract description 24
- 230000008878 coupling Effects 0.000 claims abstract description 9
- 238000010168 coupling process Methods 0.000 claims abstract description 9
- 238000005859 coupling reaction Methods 0.000 claims abstract description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 22
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 20
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 17
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical group [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 14
- 229910052725 zinc Inorganic materials 0.000 claims description 14
- 239000011701 zinc Substances 0.000 claims description 14
- 238000005266 casting Methods 0.000 claims description 13
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 12
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 10
- 229910052757 nitrogen Inorganic materials 0.000 claims description 10
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 8
- 229910052793 cadmium Inorganic materials 0.000 claims description 8
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 claims description 8
- 238000005516 engineering process Methods 0.000 claims description 6
- 238000004321 preservation Methods 0.000 claims description 6
- 239000011863 silicon-based powder Substances 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 238000005488 sandblasting Methods 0.000 claims description 4
- OSMSIOKMMFKNIL-UHFFFAOYSA-N calcium;silicon Chemical compound [Ca]=[Si] OSMSIOKMMFKNIL-UHFFFAOYSA-N 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 2
- 239000004576 sand Substances 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 abstract description 18
- 238000002347 injection Methods 0.000 abstract description 12
- 239000007924 injection Substances 0.000 abstract description 12
- 238000005536 corrosion prevention Methods 0.000 abstract description 6
- 230000002265 prevention Effects 0.000 abstract description 6
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract description 2
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003487 electrochemical reaction Methods 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000007528 sand casting Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Images
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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/02—Centrifugal casting; Casting by using centrifugal force of elongated solid or hollow bodies, e.g. pipes, in moulds rotating around their longitudinal axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/08—Casting in, on, or around objects which form part of the product for building-up linings or coverings, e.g. of anti-frictional metal
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C18/00—Alloys based on zinc
- C22C18/02—Alloys based on zinc with copper as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/02—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working in inert or controlled atmosphere or vacuum
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
- C22F1/165—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon of zinc or cadmium or alloys based thereon
-
- 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
-
- 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
- C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
- C23F13/16—Electrodes characterised by the combination of the structure and the material
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Materials Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Geochemistry & Mineralogy (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention relates to the technical field of corrosion prevention and scale prevention of tubular columns of oil field injection and production wells, in particular to a corrosion protector for a functional alloy tubular column. The device comprises a coupling, wherein the lower end of the coupling is connected with an elevator process auxiliary section, the lower end of the elevator process auxiliary section is connected with a protector body, the lower end of the protector body is connected with a hydraulic tong process auxiliary section, the protector body comprises an inner tube, and a functional alloy layer is cast on the outer surface of the inner tube. The invention realizes the corrosion prevention and scale prevention of the inner and outer surfaces of the injection and production well pipe column and the inner surface of the sleeve, and reduces the possibility of liquid leakage in the well caused by corrosion and scale formation of the injection and production pipe column. Overcomes the defects that the existing injection and production well pipe column is easy to corrode and scale.
Description
The technical field is as follows:
the invention relates to the technical field of corrosion prevention and scale prevention of oil field injection and production well pipe columns, in particular to a functional alloy pipe column corrosion protector.
Background art:
at present, due to the fact that corrosion and scaling of the inner surface and the outer surface of a tubular column of an injection and production well and the inner surface of a sleeve are caused by cold production and hot production development modes of an oil field, the tubular column comprises the sleeve, a heat insulation oil pipe, an oil well pump, a sucker rod, a downhole tool and the like, and safety and environmental protection accidents are easily caused by the corroded and scaled tubular column along with the prolonging of time. Therefore, there is a need to develop a functional alloy pipe string corrosion protector that slows down pipe string corrosion and scale formation.
The invention content is as follows:
the technical problem to be solved by the invention is to provide a functional alloy pipe column corrosion protector, which realizes corrosion prevention and scale prevention on the inner and outer surfaces of an injection and production well pipe column and the inner surface of a sleeve, and reduces the possibility of liquid leakage in a well caused by corrosion and scale formation of the injection and production pipe column. Overcomes the defects that the existing injection and production well pipe column is easy to corrode and scale.
The technical scheme adopted by the invention is as follows: a functional alloy pipe column corrosion protector comprises a coupling; the lower end of the coupling is connected with an elevator process auxiliary section, the lower end of the elevator process auxiliary section is connected with a protector body, the lower end of the protector body is connected with a hydraulic tong process auxiliary section, the protector body comprises an inner pipe, and a functional alloy layer is cast on the outer surface of the inner pipe;
the functional alloy material formula of the functional alloy layer comprises the following components in percentage by weight: 0 to 0 silicon is less than or equal to 0.05 percent, 0 to 0 tin is less than or equal to 0.85 percent, 0 to 0 copper is less than or equal to 15 percent, 0.007 to 0.12 percent cadmium is less than or equal to 0.6 percent, 0.02 to 0.03 percent iron is less than or equal to 0.02 percent, and the balance is zinc.
The upper end of the inner pipe and the lower end of the auxiliary section of the elevator process are of an integrated structure, the lower end of the inner pipe and the upper end of the auxiliary section of the hydraulic tong process are of an integrated structure, an upper anti-collision boss and a lower anti-collision boss are designed on the inner pipe at the upper end and the lower end of the functional alloy layer respectively, and the outer diameter of the functional alloy layer on the inner pipe is smaller than the outer diameter of the upper anti-collision boss and the outer diameter of the lower anti-collision boss.
The protector body still includes the load outer tube, the load outer tube suit is in the inner tube outside, form the annular space between the function alloy-layer of load outer tube and inner tube surface, the inner tube upper end is opened has the annular liquid stream pore of a plurality of intercommunication inner tube inner space and the annular space between the function alloy-layer of load outer tube and inner tube surface, the protector body upper end is connected with elevator technology auxiliary section through the top connection, the protector body lower extreme is connected with hydraulic tong technology auxiliary section through the bottom connection, the inner tube, load outer tube upper end is connected respectively on the top connection lower part, the female knot of lower extreme is gone up, load outer tube lower extreme is connected on the female knot in bottom connection upper portion, the inner tube lower extreme inserts lower clutch upper portion hole.
The outer surface of the bearing outer pipe is cast with a functional alloy layer, and the outer diameters of the functional alloy layers on the outer surface of the bearing outer pipe are smaller than the outer diameters of the upper joint and the lower joint.
The length of the auxiliary section of the elevator process is 50-1000 mm, the length of the auxiliary section of the hydraulic tong process is 50-1000 mm, and the length of the functional alloy layer is 50-800 mm.
The preparation process of the functional alloy material of the functional alloy layer is as follows: after zinc is melted, aluminum powder, copper powder and iron powder are uniformly added and uniformly stirred, the sizes of the aluminum powder, the copper powder and the iron powder are all more than 1000 meshes, the zinc liquid added with the aluminum powder, the copper powder and the iron powder is completely melted for 3 minutes, then silicon powder and tin with 400 meshes are added and uniformly stirred for 2 minutes, a silicon-calcium deoxidizer and massive cadmium accounting for 10-15% of the total mass of the functional alloy material are added and uniformly stirred for 1.5 minutes, and the functional alloy material is formed; the copper powder, the iron powder and the silicon powder are preheated before being added into the molten zinc liquid, the preheating temperature is 250-300 ℃, and the preheating is carried out in a heat treatment furnace with nitrogen protection, and the heat preservation time is 20 minutes.
The functional alloy material of the functional alloy layer is cast on the outer surface of the inner tube by utilizing a metal mold gravity rotation casting process technology, the outer surface of the inner tube is firstly subjected to sand blasting and rust removal, then is preheated in a heat treatment furnace protected by nitrogen, the preheating temperature is 300-400 ℃, the preheating time is 0.35-0.45h, the casting temperature of the functional alloy material is 420-480 ℃, the cast functional alloy material enters the heat treatment furnace protected by nitrogen to be subjected to isothermal grain refinement treatment, the isothermal temperature is 280 ℃, the heat preservation time is 2 hours, and then the functional alloy material is cooled to the normal temperature along with the furnace.
The functional alloy material of the functional alloy layer is cast on the outer surfaces of the inner pipe and the bearing outer pipe by utilizing a metal mold gravity rotating casting process technology, the outer surfaces of the inner pipe and the bearing outer pipe need sand blasting to remove rust firstly, then are preheated in a heat treatment furnace protected by nitrogen, the preheating temperature is 300-.
The preheating temperature of the inner pipe is 350 ℃, the preheating time is 0.4h, and the casting temperature of the functional alloy material is 450 ℃.
The preheating temperature of the inner pipe and the bearing outer pipe is 350 ℃, the preheating time is 0.4h, and the casting temperature of the functional alloy material is 450 ℃.
The invention has the beneficial effects that: the invention realizes the corrosion prevention and scale prevention of the inner and outer surfaces of the injection and production well pipe column and the inner surface of the sleeve, and reduces the possibility of liquid leakage in the well caused by corrosion of the injection and production pipe column.
Description of the drawings:
the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of the invention comprising a force bearing outer tube.
Fig. 3 is a structural schematic diagram of the invention in which a functional alloy layer is cast on the outer surface of the bearing outer pipe.
The specific implementation mode is as follows:
as shown in fig. 1, a functional alloy pipe column corrosion protector comprises a coupling 1; the lower end of a coupling 1 is connected with an elevator process auxiliary section 2, the lower end of the elevator process auxiliary section 2 is connected with a protector body 3, the lower end of the protector body 3 is connected with a hydraulic tong process auxiliary section 4, the protector body 3 comprises an inner pipe 5, and a functional alloy layer 6 is cast on the outer surface of the inner pipe 5; the functional alloy material of the functional alloy layer 6 is prepared according to the following three embodiments:
example 1
The functional alloy material formula of the functional alloy layer 6 comprises the following components in percentage by weight: 0.05% of silicon, 0.85% of tin, 15% of copper, 0.12% of cadmium, 0.6% of aluminum, 0.03% of iron and the balance of zinc.
Example 2
The functional alloy material formula of the functional alloy layer 6 comprises the following components in percentage by weight: 0.05% of silicon, 0.85% of tin, 15% of copper, 0.007% of cadmium, 0.3% of aluminum, 0.02% of iron and the balance of zinc.
Example 3
The functional alloy material formula of the functional alloy layer 6 comprises the following components in percentage by weight: 0.03% of silicon, 0.55% of tin, 10% of copper, 0.08% of cadmium, 0.4% of aluminum, 0.025% of iron and the balance of zinc.
The functional alloy materials obtained according to the three embodiments can reduce the corrosion rate of N80 steel sheets by 85% under the soaking of the on-site well fluid and reduce the scaling rate of N80 steel sheets by 20% under the soaking of the on-site well fluid.
The upper end of the inner pipe 5 and the lower end of the auxiliary section 2 of the elevator process are integrated into a whole, the lower end of the inner pipe 5 and the upper end of the auxiliary section 4 of the hydraulic tong process are integrated into a whole, an upper anti-collision boss 7 and a lower anti-collision boss 8 are respectively designed on the inner pipe 5 at the upper end and the lower end of the functional alloy layer 6, and the outer diameter of the functional alloy layer 6 on the inner pipe 5 is smaller than the outer diameter of the upper anti-collision boss 7 and the outer diameter of the lower anti-collision boss 8.
As shown in fig. 2, the protector body 3 further includes a force-bearing outer tube 11, the force-bearing outer tube 11 is sleeved outside the inner tube 5, an annular space is formed between the force-bearing outer tube 11 and the functional alloy layer 6 on the outer surface of the inner tube 5, the upper end of the inner tube 5 is provided with a plurality of liquid flow ducts 12 communicating the inner space of the inner tube 5 and the annular space between the force-bearing outer tube 11 and the functional alloy layer 6 on the outer surface of the inner tube 5, the upper end of the protector body 3 is connected with the elevator process auxiliary section 2 through an upper joint 9, the lower end of the protector body 3 is connected with the hydraulic tong process auxiliary section 4 through a lower joint 10, the upper ends of the inner tube 5 and the force-bearing outer tube 11 are respectively connected to upper and lower end nuts at the lower part of the upper joint 9, the lower end of the force-bearing outer tube 11 is connected to an upper nut at the lower part of the lower joint 10, and the lower end of the inner tube 5 is inserted into an upper inner hole of the lower joint 10 to be in clearance fit.
As shown in fig. 3, the outer surface of the bearing outer tube 11 is cast with the functional alloy layer 6, and the outer diameters of the functional alloy layer 6 on the outer surface of the bearing outer tube 11 are both smaller than the outer diameters of the upper joint 9 and the lower joint 10. The pipe column is positioned at the inner drift diameter of the casing, well liquid and various corrosive media enter an annular space formed by the inner pipe 5 and the outer bearing pipe 11 through a liquid flow pore passage 12 at the upper part of the inner pipe 5 and are contacted with the functional alloy layer 6 on the outer surface of the outer bearing pipe 11, the well liquid and various corrosive media are directly contacted with the functional alloy layer 6 on the outer surface of the outer bearing pipe 11, electrons are actively released by corrosion to be transferred to all the inner and outer surfaces of the pipe column and the inner surface of the casing, so that the corrosion of the inner and outer surfaces of the pipe column and the inner surface of the casing is slowed down, the functional alloy layer 6 in contact with the well liquid is subjected to electrochemical reaction with the well liquid, various alloy ions are slowly released into the well liquid, scale forming substances in the well liquid are prevented from being gathered and growing up, and the corrosion prevention and scale prevention range covers the whole pipe column.
The length of the auxiliary section 2 of the elevator process is 50-1000 mm, the length of the auxiliary section 4 of the hydraulic tong process is 50-1000 mm, and the length of the functional alloy layer 6 is 50-800 mm.
The functional alloy material of the functional alloy layer 6 is prepared by the following steps: after zinc is melted, aluminum powder, copper powder and iron powder are uniformly added and uniformly stirred, the sizes of the aluminum powder, the copper powder and the iron powder are all more than 1000 meshes, the zinc liquid added with the aluminum powder, the copper powder and the iron powder is completely melted for 3 minutes, then silicon powder and tin with 400 meshes are added and uniformly stirred for 2 minutes, a silicon-calcium deoxidizer and massive cadmium accounting for 10-15% of the total mass of the functional alloy material are added and uniformly stirred for 1.5 minutes, and the functional alloy material is formed; the copper powder, the iron powder and the silicon powder are preheated before being added into the molten zinc liquid, the preheating temperature is 250-300 ℃, and the preheating is carried out in a heat treatment furnace with nitrogen protection, and the heat preservation time is 20 minutes.
The functional alloy material of the functional alloy layer 6 is cast on the outer surfaces of the inner pipe 5 and the bearing outer pipe 11 by utilizing a metal mold gravity rotary casting process technology, so that the density of the functional alloy can be obviously improved, the porosity can be reduced and the optimal conductive capability can be ensured by distinguishing common sand casting. The outer surfaces of the inner pipe 5 and the bearing outer pipe 11 need to be subjected to sand blasting for rust removal at first and then are preheated in a heat treatment furnace protected by nitrogen, and the preheating aims to better ensure that the inner pipe and the outer pipe shrink at the same shrinkage rate in the cooling process of the functional alloy melting liquid and prevent cracks from being generated inside the functional alloy. The mechanical strength of the body can be influenced by the overhigh preheating temperature, and the body can contract with the functional alloy melting liquid at different contraction rates due to the overlow preheating temperature, so that cracks are generated in the functional alloy. The preheating temperature is 300-400 ℃, the preferred preheating temperature is 350 ℃, the preheating time of the functional alloy material is 0.35-0.45h, and the preferred preheating time is 0.4 h. The excessive casting temperature causes the overheating of alloy liquid to cause overlarge crystal grains, and the excessive casting temperature easily causes the uneven distribution of elements to influence the anticorrosion effect. The casting temperature of the functional alloy material is 420-480 ℃, and the preferred casting temperature is 450 ℃. And (3) feeding the cast functional alloy material into a heat treatment furnace with nitrogen protection to carry out isothermal grain refinement treatment, wherein the isothermal temperature is 280 ℃, the heat preservation time is 2 hours, and then cooling to the normal temperature along with the furnace.
When the hydraulic tong is used, the upper female buckle of the coupling 1 is connected with the injection-production tubular column male buckle, and the lower male buckle of the hydraulic tong process auxiliary section 4 is connected with the injection-production tubular column female buckle. The invention designs the structure assurance of the elevator process auxiliary section 2 and the hydraulic tong process auxiliary section 4 and the normal construction of other procedures.
The invention is arranged in the oil well injection and production string at intervals of 30-300 meters. The working principle of the invention is that the inner and outer surfaces of the injection-production pipe column, the inner surface of the sleeve and the functional alloy layer are in the same electrolyte environment to form a new macro battery, the inner and outer surfaces of the pipe column and the inner surface of the sleeve become cathodes, and the functional alloy becomes an anode. The anode is corroded to lose electrons, and the lost electrons are transferred to the inner surface and the outer surface of the pipe column and the inner surface of the sleeve. The process is essentially that a cathode current is provided to the inner surface and the outer surface of the tubular column and the inner surface of the sleeve through the electrolyte, so that the inner surface and the outer surface of the tubular column and the inner surface of the sleeve are subjected to cathode polarization, cathode protection is realized, and with the continuous flowing of the current, the functional alloy layer of the invention is continuously consumed, and the consumption period of the functional alloy becomes the service life prolonging period of the inner surface and the outer surface of the injection-production tubular column and the inner surface of the sleeve. Meanwhile, after electrochemical reaction, various alloy ions are slowly released into the well liquid, so that scale forming substances in the well liquid are prevented from being accumulated and growing up, and the whole pipe column is covered by an anti-corrosion and anti-scale range.
It should be understood that the detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can be modified or substituted equally to achieve the same technical effects; as long as the use requirements are met, the method is within the protection scope of the invention.
Claims (4)
1. A functional alloy pipe column corrosion protector comprises a coupling (1); the method is characterized in that: the lower end of a coupling (1) is connected with an elevator process auxiliary section (2), the lower end of the elevator process auxiliary section (2) is connected with a protector body (3), the lower end of the protector body (3) is connected with a hydraulic tong process auxiliary section (4), the protector body (3) comprises an inner pipe (5), and a functional alloy layer (6) is cast on the outer surface of the inner pipe (5);
the functional alloy material formula of the functional alloy layer (6) is as follows by weight percent: 0 to 0 silicon is less than or equal to 0.05 percent, 0 to 0 tin is less than or equal to 0.85 percent, 0 to 0 copper is less than or equal to 15 percent, 0.007 to 0.12 percent cadmium is less than or equal to 0.6 percent, 0.02 to 0.03 percent iron is less than or equal to 0.02 percent, and the balance is zinc;
the upper end of the inner pipe (5) and the lower end of the elevator process auxiliary section (2) are of an integrated structure, the lower end of the inner pipe (5) and the upper end of the hydraulic tong process auxiliary section (4) are of an integrated structure, an upper anti-collision boss (7) and a lower anti-collision boss (8) are respectively designed on the inner pipe (5) at the upper end and the lower end of the functional alloy layer (6), and the outer diameter of the upper functional alloy layer (6) of the inner pipe (5) is smaller than the outer diameter of the upper anti-collision boss (7) and the outer diameter of the lower anti-collision boss (8);
the protector body (3) further comprises a bearing outer tube (11), the bearing outer tube (11) is sleeved on the outer side of the inner tube (5), an annular space is formed between the bearing outer tube (11) and the functional alloy layer (6) on the outer surface of the inner tube (5), a plurality of liquid flow pore channels (12) which are communicated with the inner space of the inner tube (5) and the annular space between the bearing outer tube (11) and the functional alloy layer (6) on the outer surface of the inner tube (5) are formed in the upper end of the inner tube (5), the upper end of the protector body (3) is connected with the elevator process auxiliary section (2) through an upper connector (9), the lower end of the protector body (3) is connected with the hydraulic tong process auxiliary section (4) through a lower connector (10), the upper ends of the inner tube (5) and the bearing outer tube (11) are respectively connected onto an upper female buckle and a lower female buckle at the lower end of the lower connector (9), the lower end of the bearing outer tube (11) is connected onto a female buckle at the upper part of the lower connector (10), the lower end of the inner pipe (5) is inserted into an inner hole at the upper part of the lower joint (10);
the outer surface of the bearing outer pipe (11) is cast with a functional alloy layer (6), and the outer diameters of the functional alloy layers (6) on the outer surface of the bearing outer pipe (11) are smaller than the outer diameter of the upper joint (9) and the outer diameter of the lower joint (10);
the preparation process of the functional alloy material of the functional alloy layer (6) is as follows: after zinc is melted, aluminum powder, copper powder and iron powder are uniformly added and uniformly stirred, the sizes of the aluminum powder, the copper powder and the iron powder are all more than 1000 meshes, the zinc liquid added with the aluminum powder, the copper powder and the iron powder is completely melted for 3 minutes, then silicon powder and tin with 400 meshes are added and uniformly stirred for 2 minutes, a silicon-calcium deoxidizer and massive cadmium accounting for 10-15% of the total mass of the functional alloy material are added and uniformly stirred for 1.5 minutes, and the functional alloy material is formed; the copper powder, the iron powder and the silicon powder are preheated before being added into the molten zinc liquid, the preheating temperature is 250-300 ℃, and the preheating is carried out in a heat treatment furnace with nitrogen protection, and the heat preservation time is 20 minutes.
2. The functional alloy pipe string corrosion protector of claim 1, wherein: the length of the elevator process auxiliary section (2) is 50-1000 mm, the length of the hydraulic tong process auxiliary section (4) is 50-1000 mm, and the length of the functional alloy layer (6) is 50-800 mm.
3. The functional alloy pipe string corrosion protector of claim 1, wherein: the functional alloy material of the functional alloy layer (6) is cast on the outer surfaces of the inner tube (5) and the bearing outer tube (11) by utilizing a metal mold gravity rotating casting process technology, the outer surfaces of the inner tube (5) and the bearing outer tube (11) need sand blasting for rust removal firstly, then are preheated in a heat treatment furnace protected by nitrogen, the preheating temperature is 400 ℃ plus sand, the preheating time is 0.35-0.45h, the casting temperature of the functional alloy material is 480 ℃ plus sand, the cast functional alloy material enters the heat treatment furnace protected by nitrogen for isothermal grain refinement treatment, the isothermal temperature is 280 ℃, the heat preservation time is 2 hours, and then the functional alloy material needs to be cooled to the normal temperature along with the furnace.
4. The functional alloy pipe string corrosion protector of claim 3, wherein: the preheating temperature of the inner pipe (5) and the bearing outer pipe (11) is 350 ℃, the preheating time is 0.4h, and the casting temperature of the functional alloy material is 450 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010450764.6A CN111577155B (en) | 2020-05-25 | 2020-05-25 | Functional alloy pipe column corrosion protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010450764.6A CN111577155B (en) | 2020-05-25 | 2020-05-25 | Functional alloy pipe column corrosion protector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111577155A CN111577155A (en) | 2020-08-25 |
| CN111577155B true CN111577155B (en) | 2022-05-10 |
Family
ID=72127123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010450764.6A Active CN111577155B (en) | 2020-05-25 | 2020-05-25 | Functional alloy pipe column corrosion protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111577155B (en) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201245707Y (en) * | 2008-06-30 | 2009-05-27 | 东营凯维石油科技有限责任公司 | Oil pipe anti-corrosive device |
| DE202009008039U1 (en) * | 2009-06-09 | 2009-08-20 | Zeppenfeld, Kai, Dr.rer.nat. | Apparatus for preventing carbonaceous deposits ("scale") in systems and installations carrying water |
| CN104372348A (en) * | 2013-08-15 | 2015-02-25 | 中国石油天然气股份有限公司 | Zinc alloy sacrificial anode material for bushing outer wall |
| CN204401107U (en) * | 2014-12-22 | 2015-06-17 | 盘锦辽河油田金宇集团有限公司 | Oil well sacrificial anode protection device |
| CN104532089B (en) * | 2014-12-26 | 2016-08-24 | 中国石油天然气股份有限公司 | A kind of anti-corrosion alloy composition and device thereof, prepare and apply |
| CN206666644U (en) * | 2017-03-08 | 2017-11-24 | 东营市昌瑞石油机械配件有限责任公司 | Oil-water well sacrificial anode corrosion-preventing device |
| CN108118233A (en) * | 2017-12-22 | 2018-06-05 | 于海松 | The synthesis technology of corrosion stability zinc-containing alloy |
| CN208038556U (en) * | 2018-04-13 | 2018-11-02 | 新疆奥睿博节能科技发展有限公司 | A kind of oil tube cathode protector |
| CN108707910A (en) * | 2018-08-22 | 2018-10-26 | 中国石油化工股份有限公司华东油气分公司泰州采油厂 | A kind of oil tube cathode protector |
-
2020
- 2020-05-25 CN CN202010450764.6A patent/CN111577155B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN111577155A (en) | 2020-08-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111577156B (en) | Functional alloy pipe column corrosion protector | |
| CN108273974B (en) | Nodular cast iron pipe for petroleum pipeline, preparation process and application thereof | |
| CN101412109B (en) | Building and laying method capable of extending service lifetime of RH ladle working lining | |
| CN104862530A (en) | Zinc alloy sacrificial anode applicable to hot seabed mud environment | |
| CN111577155B (en) | Functional alloy pipe column corrosion protector | |
| JP5901099B2 (en) | Method for coating a cooling element | |
| CN104372348A (en) | Zinc alloy sacrificial anode material for bushing outer wall | |
| AU719587B2 (en) | Refractory wall structure | |
| CN1304619C (en) | Deep well, ultra deep well petroleum sleev in petroleum natural extraction gas and its production method | |
| CN204939506U (en) | A kind of device stoping blast furnace hearth bottom temp to raise | |
| CN102618874A (en) | Composite sacrificial anode on outer wall of bushing | |
| CN103088347B (en) | Storage tank coil pipe aluminium alloy sacrificial anode material and preparation method thereof | |
| CN214368384U (en) | Petrochemical industry machinery welded flange | |
| CN101012557A (en) | Technology for solving hydrogen sulphide corrosion of pipe drilling tool and pump during oil gas dislodging | |
| CN114737193A (en) | High-temperature-resistant sacrificial anode and preparation method thereof | |
| CN207847591U (en) | A kind of anticorrosive protecting device of oil pipes | |
| CN212249967U (en) | Functional alloy pipe column corrosion protector | |
| CN108131119A (en) | A kind of anticorrosive protecting device of oil pipes | |
| CN204829121U (en) | Acidproof wear -resisting high temperature resistant multiple composite pipe | |
| CN214327891U (en) | Anticorrosive device for casing | |
| CN220647114U (en) | Connecting honeycomb duct for connecting reaction digestion device and external conveying pipeline | |
| CN1128947C (en) | Manufacture of anticossive wear-resitant composite ceramic-metal pipe | |
| CN204627447U (en) | A kind of natural gas well anticorrosion sucker rod coupling | |
| CN210714510U (en) | Sucker rod centralizer | |
| CN103045807B (en) | Vacuum circulation degassing insert tube |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |