阅读说明：本技术 一种抗粘扣螺纹脂及其使用方法 (Anti-thread gluing thread compound and using method thereof ) 是由 田峰 刘强 罗金恒 李丽锋 于 2020-04-16 设计创作，主要内容包括：本发明公开了一种抗粘扣螺纹脂,包括组分A、组分B和组分C,三种组分质量比为A：B：C＝(0.8～1.1)：(1.6～2.2)：(3.6～4.2)；以质量百分数计,组分A包括聚酰胺固化剂30％～50％,正己烷50％～70％；组分B包括环氧树脂47％～60％,镍粉5％～15％,二硫化钨粉30％～40％,氮化硅1％～4％,气相二氧化硅1％～3％；组分C包括钛基润滑脂30％～50％,微晶石墨3％～7％,碳化硅晶须7％～13％,石墨粉15％～23％,聚四氟乙烯粉13％～18％,镍钛合金1％～4％,锌粉10％～15％。使用时先将组分B涂刷至螺纹表面后,再将组分A涂刷到被组分B涂刷过的螺纹表面后,二者会发生化学固化反应,在螺纹表面形成一层润滑涂层,该涂层具有表面附着力强的优势,然后再在该润滑涂层表面涂刷一层油基脂的润滑物质,发挥油基脂类润滑材料的物理堵塞螺纹泄漏间隙及铺展在螺纹表面的优势。(The invention discloses anti-thread gluing thread grease which comprises a component A, a component B and a component C, wherein the mass ratio of the three components is A: b: c ═ 0.8 to 1.1): (1.6-2.2): (3.6-4.2); the component A comprises 30-50% of polyamide curing agent and 50-70% of normal hexane by mass percent; the component B comprises 47-60% of epoxy resin, 5-15% of nickel powder, 30-40% of tungsten disulfide powder, 1-4% of silicon nitride and 1-3% of gas-phase silicon dioxide; the component C comprises 30-50% of titanium-based lubricating grease, 3-7% of microcrystalline graphite, 7-13% of silicon carbide whisker, 15-23% of graphite powder, 13-18% of polytetrafluoroethylene powder, 1-4% of nickel-titanium alloy and 10-15% of zinc powder. When the lubricating grease is used, the component B is firstly coated on the thread surface, then the component A is coated on the thread surface coated by the component B, the component B and the thread surface can generate chemical curing reaction, a lubricating coating is formed on the thread surface, the coating has the advantage of strong surface adhesion, and then a layer of lubricating substance of oil-based grease is coated on the surface of the lubricating coating, so that the advantages of the oil-based grease lubricating material in physical blockage of thread leakage gaps and spreading on the thread surface are exerted.)

1. The anti-thread gluing thread grease is characterized by comprising a component A, a component B and a component C, wherein the mass ratio of the three components is A: b: c ═ 0.8 to 1.1): (1.6-2.2): (3.6-4.2);

the component A comprises 30-50% of polyamide curing agent and 50-70% of normal hexane by mass percent;

the component B comprises 47-60% of epoxy resin, 5-15% of nickel powder, 30-40% of tungsten disulfide powder, 1-4% of silicon nitride and 1-3% of fumed silica by mass percent;

the component C comprises, by mass, 30-50% of titanium-based lubricating grease, 3-7% of microcrystalline graphite, 7-13% of silicon carbide whisker, 15-23% of graphite powder, 13-18% of polytetrafluoroethylene powder, 1-4% of nickel-titanium alloy and 10-15% of zinc powder.

2. The anti-galling thread compound according to claim 1, wherein the epoxy resin has a type F-44.

3. The anti-galling thread compound according to claim 1, wherein the polyamide curing agent has the type YD-9115.

4. The thread compound of claim 1, wherein the zinc powder, graphite powder, and polytetrafluoroethylene powder have a purity of 99% or more and a particle size of 350 mesh or more.

5. The thread compound of claim 1, wherein the purity of tungsten disulfide powder is above 99%, and the particle size is above 1000 mesh.

6. The anti-galling thread compound according to claim 1, wherein the penetration of the titanium-based grease is 220 to 250.

7. The anti-galling thread compound of claim 1, wherein fumed silica is used under the degussa designation 380.

8. The method for using the anti-galling thread compound according to any one of claims 1 to 7, comprising the following steps:

(1) respectively preparing a component A, a component B and a component C according to the component proportion;

(2) cleaning and cleaning the threaded surface of the oil casing, uniformly brushing the component B on the threaded surface of the oil casing, uniformly brushing the component A on the threaded surface of the oil casing on which the component B is brushed, waiting for 60-90 minutes after the component A is brushed, uniformly brushing the component C on the threaded surface of the oil casing and the threaded surface of the oil casing respectively, and finally performing a screwing operation.

9. The use according to claim 8, wherein component A is prepared by the following steps: uniformly mixing a polyamide curing agent and n-hexane;

the preparation process of the component B comprises the following steps: uniformly mixing epoxy resin, nickel powder, tungsten disulfide powder, silicon nitride and gas-phase silicon dioxide;

the preparation process of the component C comprises the following steps: uniformly mixing titanium-based lubricating grease, microcrystalline graphite, silicon carbide whiskers, graphite powder, polytetrafluoroethylene powder, nickel-titanium alloy and zinc powder.

Technical Field

The invention belongs to the technical field of oil casing thread grease, and particularly relates to anti-galling thread grease and a use method thereof.

Background

Along with the continuous development of petroleum and natural gas exploration and development, a large number of harsh working conditions such as inclined wells, horizontal wells, large-displacement cluster wells, deep wells, ultra-deep wells, gas storage wells and the like appear in oil field drilling wells, and the casing can be damaged due to various factors such as complex formation conditions, harsh conditions such as new drilling wells, well completion and the like, incomplete design standards of pipe columns, improper casing material selection, unreasonable construction process and the like in the construction process of domestic gas storage wells at present; even if the casing pipe in the well meets the strength design requirement, the pipe column can be damaged due to thread leakage, pipe column corrosion or pipe column abrasion, and the pipe column can be deformed due to the temperature effect and the loads (tensile load, external extrusion force and internal pressure) in all directions. Generally, various oil and gas well pipe column damages including gas storage wells mainly include leakage, thread gluing, abrasion, corrosion, breakage, crushing, fault breakage and the like, and the failures in different forms are hidden dangers in later-period safe operation. This causes great difficulty for later construction or treatment, and simultaneously, the drilling period and the drilling cost are greatly improved.

The consumption of various petroleum pipes in the oil-gas exploration and development process is huge, single pipes are connected into a long pipe column through threaded joints in a drill string, a casing string, a tubing string and the like applied to the oil production, the threaded connection part of the pipes is the part which is most prone to failure accidents, according to statistics of American API petroleum institute data, more than 80% of casing string failures occur in the threaded connection part, more than 70% of tubing string failures occur in the threaded connection part, the oil casing is concerned about how to prevent thread gluing from occurring in the threaded connection process, the thread gluing is a form of thread failure of special petroleum pipes, and inestimable loss is caused to the oil field production due to the thread gluing every year. Before the oil casing thread is made up, a proper amount of thread grease is coated on the thread surface, and the thread grease is a substance coated on the thread surface of the pipe before making up and plays a role in lubrication and anti-thread gluing in the process of making up and breaking out the pipe, so that the thread grease with good anti-thread gluing performance has a certain effect of inhibiting the thread gluing of the oil casing.

At present, more thread grease used in oil fields is oil-based grease thread grease, the main components of the grease are base grease, base oil, graphite powder, lead powder, zinc powder, copper powder and other soft metals, the type of thread grease has better lubricating performance aiming at general API round threads or buttress threads and even special thread buckling threads, and the lubricating and anti-thread buckling principle is as follows: the thread grease is evenly coated on the surface of the thread before the thread is fastened, and when the thread is fastened, the thread grease coated on the surface of the thread, particularly the soft metal contained in the thread grease, is screwed in, rolled and spread on the surface of the thread to form a layer of soft metal lubricating film, so that the direct contact chance of the male thread and the female thread made of the same material is reduced, various loads and lubrication are caused to occur in the soft metal lubricating film, and the probability of thread gluing is reduced.

Although the currently used oil-based grease thread grease has a certain anti-galling effect, certain defects and shortcomings still exist, the reason that the existing oil-based grease thread grease has the anti-galling effect is that contained soft metal is rolled and spread on the thread surface, but the formulas of various thread grease manufacturers are different, and the oil-based grease thread grease cannot be guaranteed to be effectively spread on the thread surface due to the difference of processing technology, quality control, thread type design and the like when various pipe mills process threads, and individual thread grease can be extruded out of the thread surface along with the thread makeup even due to poor adhesiveness on the thread surface, so that the lubrication effect cannot be achieved, and finally a large number of galling failure accidents occur on the oil casing thread.

Disclosure of Invention

The invention aims to provide anti-thread gluing thread grease and a using method thereof, which can effectively form a layer of lubricating film on the surface of a thread and play excellent lubricating and anti-thread gluing effects.

The invention is realized by the following technical scheme:

the anti-thread gluing thread grease comprises a component A, a component B and a component C, wherein the mass ratio of the three components is A: b: c ═ 0.8 to 1.1): (1.6-2.2): (3.6-4.2);

the component A comprises 30-50% of polyamide curing agent and 50-70% of normal hexane by mass percent;

the component B comprises 47-60% of epoxy resin, 5-15% of nickel powder, 30-40% of tungsten disulfide powder, 1-4% of silicon nitride and 1-3% of fumed silica by mass percent;

the component C comprises, by mass, 30-50% of titanium-based lubricating grease, 3-7% of microcrystalline graphite, 7-13% of silicon carbide whisker, 15-23% of graphite powder, 13-18% of polytetrafluoroethylene powder, 1-4% of nickel-titanium alloy and 10-15% of zinc powder.

Further, the epoxy resin is F-44 in type.

Further, the polyamide curing agent is YD-9115 in type.

Furthermore, the purity of the zinc powder, the graphite powder and the polytetrafluoroethylene powder is more than 99 percent, and the particle size is more than 350 meshes.

Furthermore, the purity of the tungsten disulfide powder is more than 99%, and the particle size is more than 1000 meshes.

Furthermore, the penetration range of the titanium-based lubricating grease is 220-250.

Further, fumed silica is used with degussa brand 380.

The invention also discloses a using method of the anti-thread gluing thread grease, which comprises the following steps:

(1) respectively preparing a component A, a component B and a component C according to the component proportion;

(2) cleaning and cleaning the threaded surface of the oil casing, uniformly brushing the component B on the threaded surface of the oil casing, uniformly brushing the component A on the threaded surface of the oil casing on which the component B is brushed, waiting for 60-90 minutes after the component A is brushed, uniformly brushing the component C on the threaded surface of the oil casing and the threaded surface of the oil casing respectively, and finally performing a screwing operation.

Further, the preparation process of the component A comprises the following steps: uniformly mixing a polyamide curing agent and n-hexane;

the preparation process of the component B comprises the following steps: uniformly mixing epoxy resin, nickel powder, tungsten disulfide powder, silicon nitride and gas-phase silicon dioxide;

the preparation process of the component C comprises the following steps: uniformly mixing titanium-based lubricating grease, microcrystalline graphite, silicon carbide whiskers, graphite powder, polytetrafluoroethylene powder, nickel-titanium alloy and zinc powder.

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

the invention discloses anti-thread gluing thread grease, wherein a component A and a component B actually belong to a two-component epoxy resin adhesive, and the component A and the component B can be adhered to the surface of a thread after reaction, so that a layer of solid lubricating film can be formed on the surface of the thread. The anti-thread gluing thread grease prepared according to the formula has good coating performance, can be conveniently coated on the thread surface of an oil sleeve, can form a layer of solid lubricating film on the thread surface, and can adhere other lubricating components in the components to play a good role in auxiliary lubrication and sealing. The solid lubrication technology is combined with the traditional brushing type thread grease technology, a novel anti-thread-gluing thread grease is creatively invented, the thread grease can form a layer of solid lubrication film on the surface of a thread in the brushing process, the surface of the solid lubrication film still has the traditional oil-based grease thread grease, the design of the technology avoids the problem that the traditional oil-based grease thread grease cannot be effectively and completely spread on the surface of the thread of an oil sleeve, the lubrication of a lubrication film between male threads and female threads is enhanced, and therefore a good anti-thread-gluing effect is achieved.

The invention discloses a method for using thread grease for anti-thread gluing, wherein, the component A and the component B are adhesive which can be solidified and agglomerated if prepared in advance, when in use, the three components are prepared on site, firstly, the component B is coated on the thread surface, then, the component A is uniformly coated on the thread surface coated by the component B, the component B and the thread surface can generate chemical curing reaction, a lubricating coating is formed on the thread surface, the coating has the advantage of strong surface adhesion, and then, a layer of lubricating substance of oil-based grease is coated on the surface of the lubricating coating, thus the advantages of the oil-based grease lubricating material that the physical blockage of thread leakage gaps and spreading on the thread surface are exerted.

Detailed Description

The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.

The anti-thread gluing thread grease disclosed by the invention consists of three components, wherein the mass ratio of the three components is A: b: c ═ 0.8 to 1.1): (1.6-2.2): (3.6-4.2), wherein the component A comprises 30-50% of polyamide curing agent and 50-70% of normal hexane by mass percent; the component B comprises 47-60% of epoxy resin, 5-15% of nickel powder, 30-40% of tungsten disulfide powder, 1-4% of silicon nitride and 1-3% of gas-phase silicon dioxide; the component C comprises 30-50% of titanium-based lubricating grease, 3-7% of microcrystalline graphite, 7-13% of silicon carbide whisker, 15-23% of graphite powder, 13-18% of polytetrafluoroethylene powder, 1-4% of nickel-titanium alloy and 10-15% of zinc powder.

The component A and the component B actually belong to a two-component epoxy resin adhesive, and can be adhered to the surface of the thread after reaction, so that a layer of solid lubricating film can be formed on the surface of the thread.

The anti-thread gluing thread grease prepared according to the formula has good coating performance, can be conveniently coated on the thread surface of an oil sleeve, can form a layer of solid lubricating film on the thread surface, and can adhere other lubricating components in the components to play a good role in auxiliary lubrication and sealing. The solid lubrication technology is combined with the traditional brushing type thread grease technology, a novel anti-thread-gluing thread grease is creatively invented, the thread grease can form a layer of solid lubrication film on the surface of a thread in the brushing process, the surface of the solid lubrication film still has the traditional oil-based grease thread grease, the design of the technology avoids the problem that the traditional oil-based grease thread grease cannot be effectively and completely spread on the surface of the thread of an oil sleeve, the lubrication of a lubrication film between male threads and female threads is enhanced, and therefore a good anti-thread-gluing effect is achieved.

Solid lubrication technology: compared with the traditional lubricating grease and lubricating oil technology, the solid lubricating technology has wide applicable temperature range and high bearing capacity, can work under the harsh conditions of high temperature, high speed, high bearing capacity, strong corrosion, strong radiation and the like, meets the requirement of environmental protection, and has outstanding advantages and application prospects in the fields of petrifaction, metallurgy, electronics, aerospace and the like.

Wherein the normal hexane belongs to common chemical reagents and is prepared by using industrial grade.

The epoxy resin is F-44, and can be purchased from Wuxi Lanxing petrochemical company Limited liability company.

The polyamide curing agent has the model number of YD-9115, and can be purchased from Dainichida chemical Co., Ltd in Yichun of Jiangxi province.

The purity of the zinc powder, the graphite powder and the polytetrafluoroethylene powder reaches more than 99 percent, and the particle size is more than 350 meshes.

The purity of the high-purity tungsten disulfide powder is above 99%, and the particle size is above 1000 meshes.

The penetration range of the titanium-based lubricating grease is 220-250.

Fumed silica can be used with degussa brand 380.

The silicon nitride powder used in the present invention is a ceramic material having excellent high temperature resistance, corrosion resistance and lubrication, and has a particle size of about 350 mesh or more.

The microcrystalline graphite powder used in the invention belongs to amorphous stone powder, which is also called soil-like graphite powder, and the grain size of the powder is required to be more than 800 meshes.

The silicon carbide whisker is gray green powder, has large length-diameter ratio, and has excellent wear resistance, high temperature resistance and corrosion resistance. The particle size should be less than 100 microns.

The nickel-titanium alloy belongs to a memory alloy and has good wear resistance, and the nickel-titanium alloy is prepared into a fiber shape and is prepared into short fibers with the length of about 0.5-2 mm and the diameter of 0.1-0.5 mm.

The preparation method of the nickel-titanium alloy fiber comprises the following steps: firstly, winding a titanium wire on a nickel hoop to manufacture a nickel-titanium coated wire with the mixing ratio of nickel and titanium being about 1:1, wherein dozens to hundreds of bunched packaging materials are used for wrapping bunched single wires with the diameter of 510mm, a bunched axial lead with the wire diameter being as thin as 0.1 to 0.5mm is manufactured through drawing and wire drawing processing, the other dozens to hundreds of bunched packaging materials are further wrapped for wire drawing again, the processing diameter is 0.1 to 0.5mm or the two bunched axial leads are subjected to heat treatment at the temperature which is about 1000 ℃ lower than the melting point of the nickel and the titanium, the nickel and the titanium are subjected to diffusion alloying in a solid phase state, and then the packaging materials are removed to obtain the nickel-titanium alloy fiber developed by the nickel-titanium alloy fiber with the shape of a bat tip.