阅读说明：本技术 一种油气装备的织构化表面及其加工方法 (Textured surface of oil and gas equipment and processing method thereof ) 是由 钟林 王国荣 刘清友 魏刚 何霞 陈林燕 胡刚 王川 张政 李智超 王紫萱 伍 于 2021-09-30 设计创作，主要内容包括：本发明公开一种油气装备的织构化表面,包括基体一、抗磨涂层和基体二,还包括织构,所述织构包括织构一和/或织构二；所述基体一与所述基体二在工作时能够相对运动,所述织构一布置于所述基体一与所述抗磨涂层的接触表面,所述织构二布置于所述抗磨涂层与所述基体二的接触表面。本发明还公开一种油气装备的织构化表面的加工方法。本发明通过涂层与织构结合的技术,同时提高油气装备的减摩、耐磨、耐腐蚀等多种性能,达到提高油气装备使用寿命、油气生产效率、减少设备失效带来的经济损失的目的。(The invention discloses a textured surface of oil and gas equipment, which comprises a first substrate, an anti-wear coating, a second substrate and textures, wherein the textures comprise the first texture and/or the second texture; the first substrate and the second substrate can move relatively during operation, the first texture is arranged on the contact surface of the first substrate and the wear-resistant coating, and the second texture is arranged on the contact surface of the wear-resistant coating and the second substrate. The invention also discloses a method for processing the textured surface of the oil-gas equipment. The invention improves various performances of friction reduction, wear resistance, corrosion resistance and the like of the oil-gas equipment by combining the coating and the texture, thereby achieving the purposes of prolonging the service life of the oil-gas equipment, improving the oil-gas production efficiency and reducing the economic loss caused by equipment failure.)

1. A textured surface of oil and gas equipment comprises a first substrate, an anti-wear coating and a second substrate; the method is characterized in that: the fabric comprises a first fabric and/or a second fabric; the first substrate and the second substrate can move relatively during operation, the first texture is arranged on the contact surface of the first substrate and the wear-resistant coating, and the second texture is arranged on the contact surface of the wear-resistant coating and the second substrate.

2. The textured surface of an oil and gas rig of claim 1, wherein: the texture comprises a plurality of pits or bulges which are three-dimensionally distributed and combined into a textured area.

3. The textured surface of an oil and gas rig of claim 2, wherein: the shape of the concave pits or the convex pits is one or more of round, square, triangular, cylindrical and cross-shaped textures.

4. The textured surface of an oil and gas rig of claim 2, wherein: the depth of the pits or the projections is 20 to 200 μm, and the diameter is 50 to 500 μm.

5. The textured surface of an oil and gas rig of claim 1, wherein: the ratio of the area of the first texture to the surface area of the first substrate is 1% -15%, and the ratio of the area of the second texture to the surface area of the wear-resistant coating is 1% -15%.

6. The textured surface of an oil and gas rig of claim 2, wherein: the plurality of pits or the bulges of the texture are uniformly and regularly arranged or arranged at intervals.

7. The textured surface of an oil and gas rig of claim 1, wherein: and a solid lubricant is distributed on the surface of the second substrate.

8. The textured surface of an oil and gas rig of claim 1, wherein: and before the texture is processed by laser, the surface of the wear-resistant coating is strengthened and modified by laser.

9. A method of machining textured surfaces of oil and gas equipment according to any one of claims 1 to 8, characterized by: the method comprises the following steps:

step one, selecting the first substrate;

step two, spraying a coating on the outer surface of the first substrate to obtain the wear-resistant coating;

machining the first texture on the contact surface of the first substrate and the wear-resistant coating before spraying the coating on the outer surface of the first substrate; and/or after spraying a coating on the outer surface of the first substrate, processing a second texture on the contact surface of the wear-resistant coating and the second substrate;

and step three, selecting the second substrate.

10. The method of machining textured surfaces of oil and gas equipment of claim 9, wherein: and in the third step, uniformly spraying a solid lubricant on the surface of the second substrate to obtain the second substrate with the solid lubricant coating.

Technical Field

The invention relates to the technical field of oil-gas equipment, in particular to a textured surface of the oil-gas equipment and a processing method thereof.

Background

At present, global energy problems are more and more serious, the development of conventional oil gas resources can not meet the requirements of human beings, and deep sea/deep layer oil gas and unconventional resource exploration and development technologies are rapidly developed and are beneficial to relieving energy crisis. However, the high temperature, high pressure, corrosion, erosion and other complex and severe environmental factors limit the service life and working performance of oil and gas equipment, and directly affect the efficiency and cost of deep sea/deep layer oil and gas and unconventional resource exploration and development.

The existing oil and gas equipment usually improves the tribology performance of a friction pair at a relative movement part by means of improving a mechanical structure or only using a single coating technology, and has the defects of insufficient antifriction and antiwear effects and poor corrosion resistance, so that the problem that the service life of the equipment is difficult to meet the production requirement is solved.

Therefore, how to comprehensively improve the wear resistance and corrosion resistance of the oil and gas equipment to meet complex and severe working conditions, break the bottleneck of the oil and gas exploitation technology, further improve the working performance of the oil and gas equipment and realize oil and gas yield increase needs to be a problem to be solved urgently at present.

Disclosure of Invention

The invention aims to provide a textured surface of oil-gas equipment and a processing method thereof, which are used for solving the problems in the prior art, and the anti-friction, wear-resisting and corrosion-resisting performances of the oil-gas equipment are improved by the technology of combining a coating and a texture, so that the aims of prolonging the service life of the oil-gas equipment, improving the oil-gas production efficiency and reducing the economic loss caused by equipment failure are fulfilled.

In order to achieve the purpose, the invention provides the following scheme: the invention provides a textured coating of oil and gas equipment, which comprises a first substrate, an anti-wear coating, a second substrate and textures, wherein the textures comprise the first texture and/or the second texture; the first substrate and the second substrate can move relatively during operation, the first texture is arranged on the contact surface of the first substrate and the wear-resistant coating, and the second texture is arranged on the contact surface of the wear-resistant coating and the second substrate.

Preferably, the texture comprises a plurality of pits or bulges with different shapes, and a plurality of texture areas formed by combining the pits or bulges in a three-dimensional distribution manner.

The shape of the concave pits or the convex pits is one or more of round, square, triangular, cylindrical and cross-shaped textures.

Preferably, the depth of the pits or the projections is 20 to 200 μm and the diameter is 50 to 500 μm.

Preferably, the ratio of the area of the first texture to the surface area of the first substrate is 1-15%, and the ratio of the area of the second texture to the surface area of the wear-resistant coating is 1-15%

Preferably, the plurality of pits or projections of the texture are uniformly arranged or spaced.

Preferably, a solid lubricant is distributed on the surface of the second substrate.

Preferably, the surface of the wear-resistant coating is subjected to strengthening modification by laser before laser processing of the texture.

The invention also discloses a method for processing the textured surface of the oil-gas equipment, which comprises the following steps:

step one, selecting the first substrate;

step two, spraying a coating on the outer surface of the first substrate to obtain the wear-resistant coating;

machining the first texture on the contact surface of the first substrate and the wear-resistant coating before spraying the coating on the outer surface of the first substrate; and/or after spraying a coating on the outer surface of the first substrate, processing a second texture on the contact surface of the wear-resistant coating and the second substrate;

and step three, selecting the second substrate.

Preferably, in the third step, a solid lubricant is uniformly sprayed on the surface of the second substrate to obtain the second substrate with the solid lubricant coating.

Compared with the prior art, the invention has the following beneficial technical effects:

the invention provides a method for combining a surface texture with a coating to be applied to a textured surface of oil-gas equipment, and the technology of combining the coating with the texture is used for improving various performances of friction reduction, wear resistance, erosion resistance, corrosion resistance and vibration resistance of the oil-gas equipment, so that the purposes of prolonging the service life of the oil-gas equipment, improving the oil-gas production efficiency and reducing economic loss caused by equipment failure are achieved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural view of a textured surface of an oil and gas installation of the present invention;

FIG. 2 is a schematic view of a coating textured bearing arrangement according to one embodiment;

wherein, 1, a first substrate; 2, wear-resistant coating; 3 a solid lubricant; 4, a second substrate; 5, texturing II; 6, texture one; 7 a first journal base; 8 bearing wear-resistant coating; 9, a second shaft sleeve substrate; 10 bearing solid lubricant; and the second bearing texture is 11, and the first bearing texture is 12.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention aims to provide a textured surface of oil and gas equipment and a processing method thereof, which are used for solving the problems in the prior art, and the technology of combining a coating and a texture is used for improving various performances of the oil and gas equipment, such as friction reduction, wear resistance, erosion resistance, corrosion resistance and the like, so that the purposes of prolonging the service life of the oil and gas equipment, improving the oil and gas production efficiency and reducing the economic loss caused by equipment failure are realized.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

As shown in fig. 1, the embodiment provides a textured surface of an oil and gas equipment, which includes a first substrate, an anti-wear coating, a second substrate, and a texture, wherein the texture includes the first texture and/or the second texture; the first substrate and the second substrate can move relatively during work, the first texture is arranged on the contact surface of the first substrate and the wear-resistant coating, and the second texture is arranged on the contact surface of the wear-resistant coating and the second substrate.

The oil-gas equipment combined with the texture coating is processed by adopting the following method:

step one, a first laser processing texture 6 is used on the surface of a first substrate 1 to obtain a surface texture; the shape of the pits (micro pits) or the bulges of the texture I6 is one or more selected from round, square, triangular, cylindrical and cross textures, and a plurality of micro pits or bulges form a textured area and are uniformly distributed on the surface of the whole substrate I1 at intervals along a plane or a curved surface.

And step two, processing a uniform hard wear-resistant coating on the surface of the substrate I1 with the surface texture, and strengthening the surface by using laser to obtain a hard wear-resistant coating 2.

Thirdly, processing a surface texture on the surface of the hard wear-resistant coating 2 by using laser to obtain the hard wear-resistant coating 2 with a surface texture II 5; the depth of the micro pits or bulges of the texture I6 and the texture II 5 is 50-200 mu m, the diameter is 50-500 mu m, and the area ratio of the texture is 1-15%. The shape of the micro pits or the bulges of the texture II 5 is one or more selected from round, square, triangular, cylindrical and cross textures, and a plurality of micro pits or bulges are combined into a textured area along the three-dimensional direction and are arranged in the contact area of the friction oil-gas equipment at intervals.

And step four, uniformly spraying the solid lubricant 3 on the surface of the second matrix 4 to obtain the second matrix 4 with the solid lubricating coating, wherein the first matrix 1 is in contact with the second matrix 4.

The relative positions of the first base body 1 and the second base body 4 can be interchanged according to the specific application equipment, and when only a single base body exists, the step four can be omitted.

In the first step, the specific process of machining the texture one 6 by using the laser comprises the following steps:

s1, placing the substrate I1 to be processed on a laser processing rotary translation processing table, adjusting a stable clamping position by using a thimble and a coaxiality detection table, and setting required laser processing parameters;

and S2, adjusting the laser processing rotary translation processing table to focus, pre-scanning the processing surface, and performing texture processing on the surface of the first substrate 1 by matching translation and rotation motion with the laser beam to form a first texture 6.

Testing the friction performance of the textured coating equipment: according to the working condition characteristics of the specific coating texturing oil-gas equipment, the following tests are selectively carried out on the coating texturing object.

1. Bond strength of coating and substrate

And (3) applying a positive load to the surface coating coated on the textured substrate I1 by using a surface scratch tester, relatively slowly sliding the substrate I1 and the testing diamond pressure head, gradually increasing the load until the coating is peeled off, and recording the peeling load strength of the coating. Wherein whether the coating is peeled off can be determined by means of pattern fluctuations of the acoustic sensor. The greater the load strength when the coating is peeled off, the higher the bond strength of the coating to the substrate 1.

2. Testing antifriction and antiwear effect of texture coating

1) Test of antifriction Property

And (3) carrying out friction performance test by using a unit/full-size bearing testing machine, detecting the friction coefficient and the wear life of the sliding bearing under a simulation working condition by using a laser processing unit/full-size textured coating drill bit sliding bearing, and carrying out comparative analysis on the friction coefficient and the wear life of the sliding bearing and a non-textured full-size test piece under the same simulation working condition. The lower the friction coefficient and the lower the wear amount, the better the antifriction and antiwear effects of the texture coating.

2) Surface temperature sensing

And (3) observing the temperature change of the coating textured test piece in real time by using a temperature monitoring system of the multifunctional friction tester, and comparing the temperature and the temperature rise of the coating textured test piece in each time period and under the working condition with the non-textured test piece so as to evaluate the effect of the surface texture on temperature reduction.

3) Surface wear analysis

And recovering the test piece subjected to the friction experiment, observing the surface morphology through ultrasonic cleaning, SEM, white light interferometer, mirror image microscope and the like, and comparing and analyzing the surface wear morphology of the textured friction pair and the non-textured friction pair, wherein the better the antifriction and wear-resistant effects of the textured coating are better as the coating is better preserved.

3. Seal leakage test

After coating texturing processing is carried out on oil gas equipment with sealing requirements, real working condition operation is simulated on full-size equipment, leaked lubricating oil or drilling fluid is recycled for volume measurement, and then quantitative analysis is carried out on leakage.

5. Actual life statistics

And (3) operating the textured coating equipment and the non-textured equipment under a simulated working condition until the textured coating equipment fails, and evaluating whether the surface texture has the effect of prolonging the service life or not by combining the service life of the coating textured equipment used on the statistical site.

Example one

Referring to fig. 2, the embodiment provides a roller cone drill bit sliding bearing with a textured coating, which includes a journal substrate i 7, a bearing wear-resistant coating 8, a sleeve substrate ii 9, a bearing solid lubricant 10, a bearing texture ii 11, and a bearing texture i 12. The coating textured sliding bearing can effectively improve the wear resistance and drag reduction effects of the bearing.

Step one, machining a second bearing texture 11 on the surface of a first journal substrate 7 by using laser, wherein the second bearing texture 11 is uniformly or alternately arranged on the surface of the whole journal at intervals along the circumferential direction to obtain a journal with a texture;

optionally, the processing mode may be spraying, electroplating, mask electrolytic processing, embossing, micro-ultrasonic processing, chemical etching, or the like, to form the texture of the target parameter. The micro-pit texture is a textured area consisting of one or two of round, square, triangular, cylindrical and cross-shaped textures.

Step two, spraying a bearing wear-resistant coating 8 on the surface of the textured shaft neck to obtain the shaft neck with the coating; the coating is made of wear-resistant alloy material.

Step three, machining a bearing texture I12 on the surface of the bearing wear-resistant coating 8 by using laser to obtain a textured coating;

furthermore, the depth of the texture is 20-200 μm, the diameter is 50-500 μm, and the area ratio of the texture is 1% -15%.

Optionally, the processing mode of the bearing texture two 11 and the processing mode of the bearing texture one 12 can be spraying, electroplating, mask electrolytic processing, embossing processing, micro ultrasonic processing or chemical etching and the like, so that the texture with target parameters is formed. The journal texture shape is a textured area consisting of one or more of a circle, a square, a triangle, a cylinder and a cross-shaped texture. The texture area is a part of the bearing area or is uniformly arranged on the whole journal surface at intervals along the circumferential direction.

And step four, processing the solid lubricant 3 on the surface of the second shaft sleeve substrate 9 to obtain the shaft sleeve with the bearing solid lubricant 10.

And step five, selecting a method related to the coating bonding force and frictional performance test to test the textured drill bit sliding bearing.

The textured coating drill bit sliding bearing obtained by the scheme of the invention utilizes the common antifriction effect of the coating and the texture, and utilizes the characteristic that the surface texture generates a hydrodynamic lubrication effect to improve the bearing capacity of a lubricating oil film, reduce the frictional wear between shaft necks and shaft sleeves and further improve the frictional wear performance of the sliding bearing; the texture is used for increasing the roughness of the matrix, the bonding strength of the coating and the matrix is greatly improved by combining the coating process, the problem that the coating is easy to peel off in the sliding bearing operation process is solved, and the corrosion resistance and the wear resistance of the surface are improved.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.

The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.