CN211005578U

CN211005578U - Device for spraying diamond-like carbon coating on motor of screw drilling tool

Info

Publication number: CN211005578U
Application number: CN201921315905.2U
Authority: CN
Inventors: 秦泽旭; 张志凯; 王玉卓; 冯婷婷; 王春秀; 刘嘉麒
Original assignee: Shandong Luhai Petroleum Equipment Co ltd
Current assignee: Shandong Luhai Petroleum Technology Co ltd
Priority date: 2019-08-14
Filing date: 2019-08-14
Publication date: 2020-07-14
Anticipated expiration: 2029-08-14

Abstract

The utility model provides a device for screw rod drilling tool motor spraying diamond-like carbon coating, including real empty room, pipeline, heating furnace, temperature sensor, pressure sensor and controller, real empty room is used for placing the stator of treating the spraying, and real empty room's one side is equipped with the pipeline that lets in spraying steam, and real empty room's bottom is equipped with the heating furnace that provides the heat source for real empty room, still is equipped with temperature sensor, pressure sensor on the real empty room, and temperature sensor and pressure sensor link to each other with the controller respectively. The utility model has the advantages that: diamond-like carbon material coatings provide superior flexibility when applied to component surfaces, and can generate less heat with lower friction, reduce wear, and extend life when compared to components that have not been sprayed with such materials.

Description

Device for spraying diamond-like carbon coating on motor of screw drilling tool

Technical Field

The utility model relates to a screw rod drilling tool motor spraying coating field, more specifically says and relates to a device that is used for screw rod drilling tool motor spraying diamond-like carbon coating.

Background

In oil and gas drilling, a screw drilling tool is mainly used for drilling special process wells, namely, other well types except for conventional diameters, such as directional wells, highly deviated wells, horizontal wells, extended reach wells, multilateral wells, cluster wells and the like. The screw drilling tool is a positive displacement downhole power tool taking drilling fluid as power, after the drilling fluid enters a motor assembly of the screw drilling tool from a drill rod, a certain pressure difference is formed at an inlet and an outlet of the motor to push a motor rotor to rotate, torque and rotating speed are generated and are transmitted to a drill bit through a universal shaft assembly and a transmission shaft, and the purpose of drilling is achieved.

The power part of the screw drill is a motor assembly, and the efficiency of the motor assembly determines the working efficiency of the screw drill. The motor assembly consists of a stator and a rotor, rubber is injected into the inner wall of the stator, and the outer circle of the rotor is plated with a wear-resistant material, so that the basic processing technology is adopted, but the physical performance of the rubber is greatly influenced by the underground temperature; the wear-resistant material on the surface of the rotor is easy to collide and chemically react with the slurry; the actual working conditions of the stator and the rotor can not meet the design requirements, so that the clearance of the stator and the rotor is changed, the friction coefficient is changed, and the efficiency loss of the drilling tool is caused.

In response to this problem, existing solutions tend to deal with the stator and rotor separately. For the problem that the rubber in the stator is greatly influenced by the underground temperature, the problem is solved by injecting rubber suitable for different temperatures. For the problem that the surface of the rotor reacts with slurry, different materials are electroplated. The above two methods can only reduce the influence of partial interference factors, and cannot completely eliminate the influence.

Disclosure of Invention

The utility model overcomes not enough among the prior art provides a device that is used for screw rod drilling tool motor spraying diamond-like carbon coating.

The purpose of the utility model is realized by the following technical scheme.

A device for spraying a diamond-like carbon coating on a motor of a screw drilling tool comprises a vacuum chamber, a pipeline, a heating furnace, a temperature sensor, a pressure sensor and a controller, wherein the vacuum chamber is used for placing a stator to be sprayed, the pipeline for introducing spraying steam is arranged on one side of the vacuum chamber, the heating furnace for providing a heat source for the vacuum chamber is arranged at the bottom of the vacuum chamber, the temperature sensor and the pressure sensor are further arranged on the vacuum chamber, and the temperature sensor and the pressure sensor are respectively connected with the controller.

Furthermore, the pipeline extends to the inner hole of the stator, and a steam outlet is formed in the side wall of the pipeline.

Furthermore, a bracket for placing the stator is arranged in the vacuum chamber.

Further, the vacuum chamber is connected with a vacuum pump.

Further, the temperature in the vacuum chamber is 90-110 ℃.

Further, the pressure in the vacuum chamber is 13-15 Pa.

Further, the thickness of the plated film of the stator is 0.02-0.1 micron.

The utility model has the advantages that:

the diamond-like carbon material selected at this time is tetrahedral amorphous carbon and mainly comprises more than 80% of sp3 bonded carbon atoms as a framework, and the material coating provides a low-friction layer, has high resistance to acid and alkaline environments and has strong chemical inertness;

when the coating is larger than 0.015 micrometer, especially when the thickness is between 0.02 and 0.1 micrometer, each property of the coating is more stable; diamond-like carbon material coatings of this thickness, when applied to the surface of a component, provide superior flexibility, generate less heat with lower friction, reduce wear, and extend life compared to components that have not been sprayed with such material.

Drawings

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

in the figure:

100. a vacuum coating machine; 103. a pipeline; 201. a stator; 200. a vacuum chamber; 301. a vacuum pump;

102. steam; 202. a stator bore; 203. a stator rubber; 204. coating; 205. a support;

401. a temperature sensor; 402. a pressure sensor; 403. heating furnace; 501. and a controller.

Detailed Description

The technical solution of the present invention is further explained by the following specific examples.

As shown in figure 1, the device for spraying the diamond-like carbon coating on the screw drill motor comprises a vacuum chamber 200, a pipeline 103, a heating furnace 403, a temperature sensor 401, a pressure sensor 402 and a controller, wherein the vacuum chamber 200 is used for placing a stator 201 to be sprayed, the pipeline 103 for introducing spraying steam is arranged on one side of the vacuum chamber 200, the heating furnace 403 for providing a heat source for the vacuum chamber 200 is arranged at the bottom of the vacuum chamber 200, the temperature sensor 401 and the pressure sensor 402 are further arranged on the vacuum chamber 200, and the temperature sensor 401 and the pressure sensor 402 are respectively connected with the controller 501.

The pipeline 103 extends to the inner hole of the stator 201, and a steam outlet is arranged on the side wall of the pipeline 103.

A bracket 205 for placing the stator 201 is arranged in the vacuum chamber 200, and the vacuum chamber 200 is connected with a vacuum pump 301.

The temperature in the vacuum chamber 200 is 90-110 deg.C, and the pressure in the vacuum chamber 200 is 13-15 Pa.

The diamond-like carbon material is a metastable material generated by combining sp3 and sp2 bonds, has the excellent characteristics of diamond and graphite, and has high hardness, high stability and excellent tribological characteristics. Diamond is bonded in the form of sp3 bonds, and graphite is bonded in the form of sp2 bonds; diamond-like carbon materials are metastable materials formed by the combination of sp3 and sp2 bonds, and a metastable set state of amorphous carbon formed. The diamond-like carbon material selected for this time is tetrahedral amorphous carbon, which is mainly composed of more than 80% of sp3 bonded carbon atoms as a framework, and the material coating provides a low friction layer and has high resistance to acidic and alkaline environments and strong chemical inertness.

The surface is adhered with diamond-like carbon material by physical vapor deposition method, which generally adopts tetrahedral amorphous carbon as carbon source, and uses evaporator to heat the evaporated material under vacuum condition to sublimate it, and the evaporated particles are deposited on the stator and rotor to form solid film. Heating the carbon source at about 100 deg.C in vacuum environment, and maintaining the pressure at 13-15Pa to form a coating film.

It has been found that the properties of the coating are more stable when the coating is greater than 0.015 micrometers, particularly when the thickness is between 0.02 and 0.1 micrometers. Diamond-like carbon material coatings of this thickness, when applied to the surface of a component, provide superior flexibility, generate less heat with lower friction, reduce wear, and extend life compared to components that have not been sprayed with such material.

In general, after spraying ordinary materials, certain surface roughness requirements are required to ensure the adhesion of a plating layer. Such diamond-like carbon materials are not required, having high atomic deposition of between about 0.009Ra to 0.018Ra, and may eliminate the need for post-treatment of the coating, which may also be deposited without any or a significant amount of pretreatment.

The working process is as follows: when in work, the vacuum coating machine 100 vaporizes tetrahedral amorphous carbon through proper temperature and proper pressure to form steam 102 which is transmitted to the inner hole of the stator 201 in the vacuum chamber 200 through the pipeline 103; the vacuum chamber 200 where the fixed character 201 is located is formed after vacuum pumping by a vacuum pump 301, and after steam 102 enters the stator hole 202, the steam is attached to the stator rubber 203 to form a coating film 204; the heating furnace 403 provides a heat source for the vacuum chamber 200, and controls the temperature to be about 100 ℃ through the temperature sensor 401; the pressure sensor 402 controls the pressure to be about 13-15 Pa. The controller 501 is a computer system equipped with temperature and pressure sensors to control the thickness of the coating in real time and to collect and store data.

While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention, and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. The utility model provides a device that is used for screw rod drilling tool motor spraying diamond-like carbon coating which characterized in that: the spraying device comprises a vacuum chamber, a pipeline, a heating furnace, a temperature sensor, a pressure sensor and a controller, wherein the vacuum chamber is used for placing a stator to be sprayed, the pipeline for introducing spraying steam is arranged on one side of the vacuum chamber, the heating furnace is arranged at the bottom of the vacuum chamber and provides a heat source for the vacuum chamber, the temperature sensor and the pressure sensor are further arranged on the vacuum chamber, and the temperature sensor and the pressure sensor are respectively connected with the controller.

2. The apparatus of claim 1 for screw drill motor spray coating diamond-like carbon coating, wherein: the pipeline extends to the inner hole of the stator, and a steam outlet is formed in the side wall of the pipeline.

3. The apparatus of claim 1 for screw drill motor spray coating diamond-like carbon coating, wherein: and a bracket for placing the stator is arranged in the vacuum chamber.

4. The apparatus of claim 1 for screw drill motor spray coating diamond-like carbon coating, wherein: the vacuum chamber is connected with a vacuum pump.

5. The apparatus of claim 1 for screw drill motor spray coating diamond-like carbon coating, wherein: the temperature in the vacuum chamber is 90-110 ℃.

6. The apparatus of claim 1 for screw drill motor spray coating diamond-like carbon coating, wherein: the pressure in the vacuum chamber is 13-15 Pa.

7. The apparatus of claim 1 for screw drill motor spray coating diamond-like carbon coating, wherein: the thickness of the coating film of the stator is 0.02-0.1 micron.