Rubber composite material for sealing multiphase booster pump as well as preparation method and application of rubber composite material

Abstract

The invention discloses a rubber composite material for sealing a multiphase booster pump as well as a preparation method and application thereof. The invention belongs to the field of mechanical sealing materials and preparation thereof. According to the use environment of the multi-phase booster pump, factors such as temperature, pressure, corrosion and safety are considered, a rubber material is used as a binder, continuous basalt fibers are used as a reinforcing framework, the rubber material is compounded in a winding mode, and under the conditions of a certain temperature, a certain speed, a certain angle and a certain period of time, the composite material is prepared. The rubber composite material is obtained by forming in a mold through winding and secondary vulcanization, so that the strength, corrosion resistance and other properties of the rubber material are effectively improved. And the maintenance period of the multi-phase booster pump sealing element can be prolonged by using the material as the material for the multi-phase booster pump sealing element.

Description

Technical Field

[0001] The invention belongs to the field of mechanical sealing materials and preparation thereof, and in particular relates to a rubber composite material for multiphase booster pump sealing and a preparation method and application thereof. Background Art

[0002] With the continuous progress of oil production, some problems in the development of oil and gas fields continue to emerge, such as the inability of low-pressure reservoirs to develop by self-flowing, insufficient reservoir pressure in the middle and late stages of oil and gas field development, excessive water content in gas fields, and low gas field recovery rates. These problems have affected the safety and economic effectiveness of oil and gas field development to a certain extent. Therefore, it is necessary to study a method to improve the safety and economic effectiveness of the development of depleted oil and gas fields, especially those involving special environments, such as deepwater oil and gas fields, so multiphase boosting technology came into being. It is reported that using two underwater booster pumps to boost the oil well can increase oil production by at least 4,000 barrels a day.

[0003] For multiphase pumps used in oil and gas fields, the pump body not only needs to seal crude oil, but also natural gas, so the flange connection in the pump body needs to be sealed. The sealing products currently used need to be replaced every 3-4 years, which increases the maintenance cost for multiphase booster pumps used in special environments such as underwater. In order to reduce the maintenance cost of multiphase booster pumps and improve their efficiency, it is particularly necessary to develop a new sealing material and product. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide a rubber composite material for multiphase booster pump seal and a preparation method and application thereof.

[0005] The technical solution of the present invention is as follows:

[0006] One of the purposes of the present invention is to provide a method for preparing a rubber composite material for a multiphase booster pump seal, the method being carried out according to the following steps:

[0007] S1: heating rubber particles to a molten state, and then completely soaking the basalt fibers in an elastic tension state in the molten rubber and winding them to form a green body;

[0008] S2: placing the green body together with the mold core into a heating furnace for heat treatment to obtain a rubber composite material.

[0009] It is further defined that the rubber particles in S1 include fluororubber.

[0010] It is further defined that the heating temperature in S1 is 120-140°C.

[0011] It is further defined that the rotation speed of the winding molding in S1 is 5-15 rpm.

[0012] It is further defined that the volume ratio of the rubber particles to the basalt fibers in S1 is (30-80):(20-70).

[0013] It is further defined that the winding angle in S1 is 30-45°.

[0014] It is further defined that the heat treatment process in S2 is: heating from room temperature to 120-140°C at a heating rate of 5°C / min, then keeping the temperature for 60 minutes, then cooling with the furnace, and keeping the temperature for 15 minutes when the temperature drops to 80°C.

[0015] Furthermore, the temperature is raised from room temperature to 130°C and then maintained for 60 minutes.

[0016] A second object of the present invention is to provide a rubber composite material prepared by the above method.

[0017] A third object of the present invention is to provide an application of the rubber composite material prepared by the above method in a multiphase booster pump seal.

[0018] Compared with the prior art, the present invention has the following significant effects:

[0019] According to the use environment of the multiphase booster pump, the present invention takes into account factors such as temperature, pressure, corrosion, and safety, and proposes to use rubber material as a binder, use continuous basalt fiber as a reinforcing skeleton, and use a winding method to perform a composite treatment on the rubber material. Under certain temperature, speed, angle, and time conditions, the rubber composite material is formed in a mold by winding and secondary vulcanization, and the strength and corrosion resistance of the rubber material are effectively improved. Using it as a material for a multiphase booster pump seal can extend the maintenance period of the multiphase booster pump seal. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0021] The experimental methods used in the following examples are conventional methods unless otherwise specified. The materials, reagents, methods and instruments used are conventional materials, reagents, methods and instruments in the art unless otherwise specified, and can be obtained through commercial channels by those skilled in the art.

[0022] The terms "comprising," "including," "having," "containing," or any other variations thereof, as used in the following examples, are intended to cover a non-exclusive inclusion. For example, a composition, step, method, article, or apparatus comprising the listed elements is not necessarily limited to only those elements, but may include other elements not expressly listed or inherent to such composition, step, method, article, or apparatus.

[0023] When equivalent, concentration or other value or parameter is represented by the range limited by range, preferred range or a series of upper preferred value and lower preferred value, this should be understood as specifically disclosing all ranges formed by any pairing of any upper range limit or preferred value and any lower range limit or preferred value, regardless of whether the scope is disclosed separately. For example, when disclosing range "1 to 5", described range should be interpreted as including range "1 to 4", "1 to 3", "1 to 2", "1 to 2 and 4 to 5", "1 to 3 and 5" etc. When numerical range is described in this article, unless otherwise stated, the scope is intended to include its end value and all integers and fractions within the scope. In the present application specification and claims, range limitation can be combined and / or interchanged, if these ranges are not otherwise stated, include all sub-ranges contained therein.

[0024] The endpoints and any values ​​of the ranges disclosed in the invention are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of each range, the endpoint values ​​of each range and the individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be regarded as specifically disclosed in this article.

[0025] The fluororubber particles used in the following examples were purchased from Yuyao Fluoro New Materials Co., Ltd., and the basalt fibers were purchased from Shanxi Basiaote Technology Co., Ltd.

[0026] Embodiment 1: The preparation method of a rubber composite material for a multiphase booster pump seal of this embodiment is carried out by the following steps:

[0027] (1) Weigh 50 parts of fluororubber particles and 50 parts of basalt fibers by volume.

[0028] (2) The fluororubber particles are heated at 130° C. to a molten state, and then the basalt fibers in an elastic tension state are completely soaked in the molten rubber, and then wound at 10 rpm with a winding angle of 30° to obtain a green body.

[0029] (3) The green body and the mold core are placed in a heating furnace, and the temperature is increased from room temperature to 130°C at a heating rate of 5°C / min, and then kept at this temperature for 60 minutes, and then cooled in the furnace. When the temperature drops to 80°C, the temperature is kept at this temperature for 15 minutes, and then the green body is cooled in the furnace to room temperature to obtain a rubber composite material.

[0030] According to tests, the rubber composite material obtained in this embodiment is used to make a sealing component, and its service life is effectively extended.

[0031] Embodiment 2: The preparation method of a rubber composite material for a multiphase booster pump seal of this embodiment is carried out by the following steps:

[0032] (1) Weigh 60 parts of fluororubber particles and 40 parts of basalt fibers by volume.

[0033] (2) The fluororubber particles are heated at 130° C. to a molten state, and then the basalt fibers in an elastic tension state are completely soaked in the molten rubber, and then wound at 10 rpm with a winding angle of 30° to obtain a green body.

[0034] (3) The green body and the mold core are placed in a heating furnace, and the temperature is increased from room temperature to 130°C at a heating rate of 5°C / min, and then kept at this temperature for 60 minutes, and then cooled in the furnace. When the temperature drops to 80°C, the temperature is kept at this temperature for 15 minutes, and then the green body is cooled in the furnace to room temperature to obtain a rubber composite material.

[0035] According to tests, the rubber composite material obtained in this embodiment is used to make a sealing component, and its service life is effectively extended.

[0036] Embodiment 3: The preparation method of a rubber composite material for a multiphase booster pump seal of this embodiment is carried out by the following steps:

[0037] (1) Weigh 70 parts of fluororubber particles and 30 parts of basalt fibers by volume.

[0038] (2) The fluororubber particles were heated at 130°C to a molten state, and then the basalt fibers in an elastic tension state were completely soaked in the molten rubber and wound at 10 rpm with a winding angle of 30° to obtain a green body.

[0039] (3) The green body and the mold core are placed in a heating furnace, and the temperature is increased from room temperature to 130°C at a heating rate of 5°C / min, and then kept at this temperature for 60 minutes, and then cooled in the furnace. When the temperature drops to 80°C, the temperature is kept at this temperature for 15 minutes, and then the green body is cooled in the furnace to room temperature to obtain a rubber composite material.

[0040] According to tests, the rubber composite material obtained in this embodiment is used to make a sealing component, and its service life is effectively extended.

[0041] Embodiment 4: The preparation method of a rubber composite material for a multiphase booster pump seal of this embodiment is carried out by the following steps:

[0042] (1) Weigh 50 parts of fluororubber particles and 50 parts of basalt fibers by volume.

[0043] (2) The fluororubber particles were heated at 130° C. to a molten state, and then the basalt fibers in an elastic tension state were completely soaked in the molten rubber, and then wound at 10 rpm with a winding angle of 35° to obtain a green body.

[0044] (3) The green body and the mold core are placed in a heating furnace, and the temperature is increased from room temperature to 130°C at a heating rate of 5°C / min, and then kept at this temperature for 60 minutes, and then cooled in the furnace. When the temperature drops to 80°C, the temperature is kept at this temperature for 15 minutes, and then the green body is cooled in the furnace to room temperature to obtain a rubber composite material.

[0045] According to tests, the rubber composite material obtained in this embodiment is used to make a sealing component, and its service life is effectively extended.

[0046] Embodiment 5: The preparation method of a rubber composite material for a multiphase booster pump seal of this embodiment is carried out by the following steps:

[0047] (1) Weigh 50 parts of fluororubber particles and 50 parts of basalt fibers by volume.

[0048] (2) The fluororubber particles are heated at 130° C. to a molten state, and then the basalt fibers in an elastic tension state are completely soaked in the molten rubber, and then wound at 10 rpm with a winding angle of 40° to obtain a green body.

[0049] (3) The green body and the mold core are placed in a heating furnace, and the temperature is increased from room temperature to 130°C at a heating rate of 5°C / min, and then kept at this temperature for 60 minutes, and then cooled in the furnace. When the temperature drops to 80°C, the temperature is kept at this temperature for 15 minutes, and then the green body is cooled in the furnace to room temperature to obtain a rubber composite material.

[0050] According to tests, the rubber composite material obtained in this embodiment is used to make a sealing component, and its service life is effectively extended.

[0051] According to GB / T 528-2009 “Vulcanized rubber or thermoplastic rubber-Determination of tensile stress-strain properties”, the mechanical properties test of rubber composite materials was carried out. The results are shown in Table 1.

[0052] Table 1

[0053] Tensile strength(MPa) Example 1 1430 Example 2 1250 Example 3 1060 Example 4 870 Example 5 720

[0054] The above are only preferred specific embodiments of the present invention, which are all different implementations based on the overall concept of the present invention, and the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A method for preparing a rubber composite material for a multiphase booster pump seal, characterized in that: Follow these steps: S1: heating rubber particles to a molten state, and then completely soaking the basalt fibers in an elastic tension state in the molten rubber and winding them to form a green body; S2: placing the green body together with the mold core into a heating furnace for heat treatment to obtain a rubber composite material.

2. The method according to claim 1, characterized in that The rubber particles in S1 include fluororubber.

3. The method according to claim 1, characterized in that The heating temperature in S1 is 120-140°C.

4. The method according to claim 1, characterized in that: The rotation speed of winding in S1 is 5-15 rpm.

5. The method according to claim 1, characterized in that The volume ratio of rubber particles to basalt fibers in S1 is (30-80):(20-70).

6. The method according to claim 1, characterized in that The winding angle in S1 is 30-45°.

7. The method according to claim 1, characterized in that The heat treatment process in S2 is: heating from room temperature to 120-140°C at a heating rate of 5°C / min, then keeping the temperature for 60 minutes, then cooling with the furnace, and keeping the temperature for 15 minutes when the temperature drops to 80°C.

8. The method according to claim 7, characterized in that The temperature was raised from room temperature to 130°C and then kept at this temperature for 60 minutes.

9. The rubber composite material obtained by the method according to any one of claims 1 to 8.

10. Use of the rubber composite material prepared by the method according to any one of claims 1 to 8 in a multiphase booster pump seal.