A protective anti-corrosion and anti-wax coating and method for reducing wear of oil production pipe

Abstract

The present invention belongs to the technical field of metal pipeline anti-corrosion and anti-wax, and specifically relates to a protective anti-corrosion and anti-wax coating and method for reducing the wear of oil production pipes. The anti-corrosion and anti-wax coating of the present invention includes a first treatment layer, a second treatment layer, a first adhesive layer, a first high temperature resistant layer, a second adhesive layer, a second high temperature resistant layer, a third adhesive layer, a hot layer, a cold layer, a protective layer and an anti-corrosion layer, which are sequentially arranged on the inner wall of the pipe wall body from bottom to top; a heating pipeline is arranged in the hot layer; and a cooling pipeline is arranged in the cold layer. By alternately implementing the expansion of the hot layer and the contraction of the cold layer, a reciprocating expansion and contraction effect is achieved, which effectively avoids the block coagulation of the wax layer and reduces the formation of the wax layer. At the same time, the partially formed wax layer can be broken up so that it is discharged with the fluid in the pipeline, ensuring the continuous transmission and transportation of crude oil to the outside.

Description

Technical Field

[0001] The invention belongs to the technical field of metal pipeline anti-corrosion and anti-wax, and in particular relates to a protective anti-corrosion and anti-wax coating and a method for reducing wear of oil production pipes. Background Art

[0002] The oil production pipeline of the prior art is an important component used in crude oil production. It realizes the continuous transmission and transportation of crude oil to the outside. In this process, the oil production pipeline not only withstands high-pressure flow, but also suffers from long-term wax corrosion of crude oil. Especially in the middle and late stages of crude oil production, as the water content of oil field produced fluid increases, the oil field production pipeline is waxed and scaled, which causes the pipeline to shrink in diameter and the flow cross-sectional area to decrease, resulting in pressure loss, reduced displacement and pipeline blockage. It can also induce local corrosion of the pipeline, causing pipeline leakage, leading to frequent pipeline leakage and even perforation, and ultimately causing destructive accidents. Therefore, the anti-scaling and anti-corrosion of oil production pipelines have always been a top priority. Summary of the invention

[0003] The invention provides a protective anti-corrosion and anti-wax coating and method for reducing wear of an oil production pipe, aiming to effectively prevent caking and corrosion of the oil production pipe.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A protective anti-corrosion and anti-wax coating for reducing wear of an oil production pipe, comprising a first treated layer, a second treated layer, a first adhesive layer, a first high-temperature resistant layer, a second adhesive layer, a second high-temperature resistant layer, a third adhesive layer, a hot layer, a heating pipe, a cold layer, a cooling pipe, a protective layer and an anti-corrosion layer; the first treated layer, the second treated layer, the first adhesive layer, the first high-temperature resistant layer, the second adhesive layer, the second high-temperature resistant layer, the third adhesive layer, the hot layer and the cold layer are sequentially arranged on the inner wall of the pipe body from bottom to top; a heating pipe is arranged in the hot layer; and a cooling pipe is arranged in the cold layer.

[0006] The first treated layer is a polished treated layer, and the roughness of the polished treated layer does not exceed 6.3.

[0007] The second treated layer is a quenched treated layer, and the quenched hardness of the quenched treated layer is 55-60HRC.

[0008] The first adhesive layer, the second adhesive layer and the third adhesive layer are all high temperature resistant adhesives.

[0009] The high temperature resistant adhesive is an inorganic adhesive resistant to 400°C.

[0010] The first high temperature resistant layer and the second high temperature resistant layer are made of nano aerogel felt material with a thickness of 5.8-6.2 mm and a thermal conductivity of 0.023 W / (mK).

[0011] The second adhesive layer and the first high temperature resistant layer, the second high temperature resistant layer and the second adhesive layer, the third adhesive layer and the second high temperature resistant layer, and the hot layer and the third adhesive layer are all connected by bonding; the protective layer and the cold layer are connected by tight fit.

[0012] The cold layer and the hot layer are an integrally formed structure.

[0013] The heating pipes and cooling pipes are both arranged along the circumferential direction, and a plurality of them are arranged.

[0014] A protective anti-corrosion and anti-wax method for reducing oil production pipe wear, comprising the following steps:

[0015] Step 1: Thermal layer expansion;

[0016] The heating pipes in the heating layer are heated by external heating equipment, which makes the heating layer expand and embrittles the wax layer in the oil pipe;

[0017] Step 2: Cold layer shrinkage;

[0018] The cooling pipe in the cold layer is supplied with cold air through an external cooling device, so that the cold layer shrinks;

[0019] Step 3: Implement step 1 and step 2 alternately.

[0020] Beneficial effects:

[0021] 1. The present invention realizes the embrittlement of the wax layer of the oil production pipeline by setting the thermal layer, which is conducive to the shedding of the wax layer.

[0022] 2. The present invention provides a hot layer and a cold layer which perform a reciprocating heat and cold cycle during use, thereby achieving a reciprocating expansion and contraction effect, thereby effectively avoiding the block-like agglomeration of the wax layer in the oil production pipeline and reducing the formation of the wax layer. At the same time, the partially formed wax layer can be broken up so that it can be discharged along with the fluid in the pipeline.

[0023] 3. The present invention effectively improves the firmness and flatness of the first adhesive layer and the first high temperature resistant layer by arranging the first treatment layer and the second treatment layer outside the oil production pipeline wall body.

[0024] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 is a flow chart of the present invention;

[0027] Figure 2 It is an enlarged view of the cooling pipe part of the present invention;

[0028] Figure 3 It is a front view of the present invention;

[0029] Figure 4 It is a perspective view of the present invention.

[0030] In the figure: 1- pipe wall body; 2- first treatment layer; 3- second treatment layer; 4- first adhesive layer; 5- first high temperature resistant layer; 6- second adhesive layer; 7- second high temperature resistant layer; 8- third adhesive layer; 9- hot layer; 10- cold layer; 11- cooling pipe; 12- protective layer; 13- anti-corrosion layer; 901- heating pipe. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Embodiment 1:

[0033] Reference Figure 2 to Figure 4 A protective anti-corrosion and anti-wax coating for reducing wear of an oil production pipe is shown, comprising a first treatment layer 2, a second treatment layer 3, a first adhesive layer 4, a first high-temperature resistant layer 5, a second adhesive layer 6, a second high-temperature resistant layer 7, a third adhesive layer 8, a hot layer 9, a heating pipe 901, a cold layer 10, a cooling pipe 11, a protective layer 12 and an anti-corrosion layer 13; the first treatment layer 2, the second treatment layer 3, the first adhesive layer 4, the first high-temperature resistant layer 5, the second adhesive layer 6, the second high-temperature resistant layer 7, the third adhesive layer 8, the hot layer 9, and the cold layer 10 are sequentially arranged on the inner wall of the pipe wall body 1 from bottom to top; a heating pipe 901 is arranged in the hot layer 9; and a cooling pipe 11 is arranged in the cold layer 10.

[0034] In specific applications of the present invention, the front and rear ends of the heating pipe 901 in the hot layer 9 are respectively connected to the heating equipment of the prior art, so that heat can be supplied to achieve the embrittlement of the wax layer in the oil production pipeline and expand the hot layer at the same time; the front and rear ends of the cooling pipe 11 provided in the cold layer 10 are respectively connected to the cooling equipment of the prior art, so that the oil production pipeline can be cooled and the cold layer 10 can be contracted. When the hot layer 9 and the cold layer 10 are alternately heated and cooled, they play a reciprocating expansion and contraction role, effectively avoiding the block aggregation of the wax layer, reducing the formation of the wax layer in the oil production pipeline, and at the same time, the partially formed wax layer can be broken up so that it can be discharged with the fluid in the oil production pipeline.

[0035] The provision of the first treatment layer 2 and the second treatment layer 3 effectively improves the firmness and flatness of the first adhesive layer 4 and the first high temperature resistant layer 5 .

[0036] The anti-corrosion layer 13 is sprayed on the outside of the protective layer 12 for shielding and protection, which effectively reduces the corrosion of the protective layer 12 by the corrosive liquid in the oil pipeline and improves the anti-corrosion effect.

[0037] Embodiment 2:

[0038] Reference Figure 2 The protective anti-corrosion and anti-wax coating for reducing wear of oil production pipes shown is based on the first embodiment, wherein the first treatment layer 2 is a polishing treatment layer, and the roughness of the polishing treatment layer does not exceed 6.3.

[0039] In actual use, the roughness of the first treatment layer 2 adopts a technical solution of not exceeding 6.3, so that the surface of the first treatment layer 2 is smooth, which is convenient for subsequent gluing.

[0040] Embodiment three:

[0041] Reference Figure 2 The protective anti-corrosion and anti-wax coating for reducing wear of oil production pipes shown is based on the first embodiment: the second treatment layer 3 is a quenching treatment layer, and the quenching hardness of the quenching treatment layer is 55-60HRC.

[0042] In actual use, the second treatment layer 3 adopts the technical solution to improve the strength of the tube wall body 1 and effectively increase the tolerance of the tube wall body 1 during alternating hot and cold conditions.

[0043] Embodiment 4:

[0044] Reference Figure 2 and Figure 3 The protective anti-corrosion and anti-wax coating for reducing wear of oil production pipes shown is based on the first embodiment: the first adhesive layer 4, the second adhesive layer 6 and the third adhesive layer 8 are all high temperature resistant adhesives.

[0045] Furthermore, the high temperature resistant adhesive is an inorganic adhesive resistant to 400°C.

[0046] In actual use, the first adhesive layer 4, the second adhesive layer 6 and the third adhesive layer 8 adopt this technical solution to achieve good adhesion.

[0047] The high temperature resistant adhesive in this embodiment is an inorganic one-component high temperature structural adhesive with a temperature resistance of 400°C; the inorganic adhesive is a one-component inorganic high temperature structural adhesive.

[0048] Embodiment five:

[0049] Reference Figure 2 The protective anti-corrosion and anti-wax coating for reducing wear of oil production pipes shown is based on Example 1: the first high-temperature resistant layer 5 and the second high-temperature resistant layer 7 are made of nano aerogel felt material with a thickness of 5.8-6.2 mm and a thermal conductivity of 0.023 W / (mK).

[0050] In actual use, the first high temperature resistant layer 5 and the second high temperature resistant layer 7 adopt the technical solution, which can withstand a high temperature of 1400° C. and have a light weight, thereby effectively preventing the heat circulated in the heat layer 9 from being transferred to the pipe wall body 1 .

[0051] Embodiment six:

[0052] Reference Figure 2 The protective anti-corrosion and anti-wax coating for reducing wear of oil production pipes shown in the figure is based on the first embodiment: the second adhesive layer 6 and the first high temperature resistant layer 5, the second high temperature resistant layer 7 and the second adhesive layer 6, the third adhesive layer 8 and the second high temperature resistant layer 7, and the hot layer 9 and the third adhesive layer 8 are all connected by adhesive bonding: the protective layer 12 and the cold layer 10 are connected by tight fit. .

[0053] In actual use, the technical solution can be used to conveniently connect the second adhesive layer 6 with the first high temperature resistant layer 5, the second high temperature resistant layer 7 with the second adhesive layer 6, the third adhesive layer 8 with the second high temperature resistant layer 7, and the thermal layer 9 with the third adhesive layer 8.

[0054] Embodiment seven:

[0055] Reference Figure 2 The protective anti-corrosion and anti-wax coating for reducing wear of oil production pipes shown is based on Example 1: the cold layer 10 and the hot layer 9 are an integrally formed structure.

[0056] In actual use, the cold layer 10 and the hot layer 9 are an integrated structure, which effectively reduces the loss of material processing and the difficulty of installation. The integrated molding completes the temperature alternation as quickly as possible during the hot and cold alternation process, avoiding heat loss and heat conduction of coatings such as adhesives.

[0057] The use of this technical solution also prolongs the service life of the cold layer 10 and the hot layer 9, and prevents the influence of thermal expansion and contraction on the deformation of the cold and hot layers and stress deformation and damage.

[0058] Embodiment eight:

[0059] Reference Figure 2 A protective anti-corrosion and anti-wax coating for reducing wear of oil production pipes is shown, based on the first embodiment: the heating pipe 901 and the cooling pipe 11 are both arranged along the circumferential direction, and a plurality of them are arranged.

[0060] In actual use, the heating pipe 901 and the cooling pipe 11 adopt the technical solution, which makes it easy for heat to be transferred to the heat layer 9 through the heating pipe 901, thereby achieving the purpose of heating and facilitating cooling.

[0061] Embodiment nine:

[0062] Reference Figure 1 A protective anti-corrosion and anti-wax method for reducing wear of oil production pipes shown in the figure comprises the following steps:

[0063] Step 1: thermal layer 9 expands;

[0064] The heating pipe 901 in the heating layer 9 is heated by an external heating device, so that the heating layer 9 expands and the wax layer in the oil pipe is embrittled;

[0065] Step 2: The cold layer 10 shrinks;

[0066] The cooling pipe 11 in the cooling layer 10 is supplied with cold air through an external cooling device, so that the cooling layer 10 contracts;

[0067] Step 3: Implement step 1 and step 2 alternately.

[0068] The present invention supplies heat through the heating pipe 901 in the hot layer 9, so that the hot layer 9 expands, which can make the wax layer embrittled and facilitate the shedding of the wax layer; cools down through the cooling pipe 11 in the cold layer 10, so that the cold layer 10 shrinks, which can play a reciprocating expansion and contraction role, effectively avoiding the block coagulation of the wax layer and reducing the formation of the wax layer. At the same time, it can break up the partially formed wax layer so that it is discharged with the fluid in the pipeline, ensuring the continuous transmission and transportation of crude oil to the outside.

[0069] In step 1, when the heating equipment is heating, the heating time is determined according to the surface temperature of the hot layer, and the temperature of the hot layer 9 is stably maintained at not less than 80°C for not less than 1 hour. In step 2, the external cooling equipment supplies cold air, and the time of cold air supply is to keep the temperature of the cold layer 10 below 4°C for more than half an hour.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

[0071] In the absence of conflicts, technicians in this field can combine the relevant technical features in the above examples according to actual conditions to achieve corresponding technical effects. The specific combinations are not described here one by one.

[0072] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0073] The above are only preferred embodiments of the present invention. The present invention will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein. Any simple modification, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A protective anti-corrosion and anti-wax coating for reducing wear of oil production pipes, characterized in that: It also comprises a first treatment layer (2), a second treatment layer (3), a first adhesive layer (4), a first high temperature resistant layer (5), a second adhesive layer (6), a second high temperature resistant layer (7), a third adhesive layer (8), a hot layer (9), a heating pipe (901), a cold layer (10), a cooling pipe (11), a protective layer (12) and an anti-corrosion layer (13); the first treatment layer (2), the second treatment layer (3), the first adhesive layer (4), the first high temperature resistant layer (5), the second adhesive layer (6), the second high temperature resistant layer (7), the third adhesive layer (8), the hot layer (9) and the cold layer (10) are sequentially arranged on the inner wall of the pipe wall body (1) from bottom to top; the heating pipe (901) is arranged in the hot layer (9); and the cooling pipe (11) is arranged in the cold layer (10); The second treated layer (3) is a quenched treated layer, and the quenched hardness of the quenched treated layer is 55-60HRC; The cold layer (10) and the hot layer (9) are an integrally formed structure, which prevents the deformation of the cold and hot layers due to thermal expansion and contraction, as well as stress deformation and damage.

2. A protective anti-corrosion and anti-wax coating for reducing wear of oil production pipes as claimed in claim 1, characterized in that: The first treated layer (2) is a polished treated layer, and the roughness of the polished treated layer does not exceed 6.

3.

3. The protective anti-corrosion and anti-wax coating for reducing wear of oil production pipe according to claim 1, characterized in that: The first adhesive layer (4), the second adhesive layer (6) and the third adhesive layer (8) are all high temperature resistant adhesives.

4. A protective anti-corrosion and anti-wax coating for reducing wear of oil production pipes as claimed in claim 3, characterized in that: The high temperature resistant adhesive is an inorganic adhesive resistant to 400°C.

5. The protective anti-corrosion and anti-wax coating for reducing wear of oil production pipe according to claim 1, characterized in that: The first high temperature resistant layer (5) and the second high temperature resistant layer (7) are made of a nano-aerogel felt material with a thickness of 5.8-6.2 mm and a thermal conductivity of 0.023 W / (mK).

6. The protective anti-corrosion and anti-wax coating for reducing wear of oil production pipe according to claim 1, characterized in that: The second adhesive layer (6) and the first high temperature resistant layer (5), the second high temperature resistant layer (7) and the second adhesive layer (6), the third adhesive layer (8) and the second high temperature resistant layer (7), and the hot layer (9) and the third adhesive layer (8) are all connected by gluing; the protective layer (12) and the cold layer (10) are connected by tight fit.

7. The protective anti-corrosion and anti-wax coating for reducing wear of oil production pipe according to claim 1, characterized in that: The heating pipe (901) and the cooling pipe (11) are both arranged along the circumferential direction, and a plurality of them are arranged.

8. A method for reducing wear and tear of protective oil production pipe corrosion and wax prevention, characterized in that: The protective anti-corrosion and anti-wax coating for reducing oil production pipe wear as claimed in any one of claims 1 to 7 comprises the following steps: Step 1: expansion of the thermal layer (9); The heating pipe (901) in the heating layer (9) is heated by an external heating device, so that the heating layer (9) expands and the wax layer in the oil pipe is embrittled; Step 2: The cold layer (10) shrinks; The cooling pipe (11) in the cooling layer (10) supplies cold air via an external cooling device, thereby causing the cooling layer (10) to contract; Step 3: Implement step 1 and step 2 alternately.

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