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Anti-galling thread grease and method of using the same

A thread grease and anti-galling technology, applied in the field of oil-casing thread grease, can solve the problems of inability to guarantee oil-based grease thread grease, failure of oil-casing thread adhesion, failure to lubricate, etc., and achieve good auxiliary lubrication and sealing, strong adhesion and enhanced lubricity

Active Publication Date: 2022-07-05
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the currently used oil-based grease thread grease has a certain anti-sticking effect, there are still certain defects and deficiencies. The reason why the existing oil-based grease thread grease plays an anti-sticking effect is that the soft metal contained is Rolling and spreading on the thread surface, but because the formulas of various thread grease manufacturers vary widely, each pipe factory cannot guarantee that the oil-based thread grease can be effectively processed due to differences in processing technology, quality control, and buckle design when processing threads. Spread on the thread surface, some thread grease will be squeezed out of the thread surface with the make-up of the thread due to poor adhesion on the thread surface, which will result in failure to lubricate, and eventually lead to a large amount of sticking of the oil casing thread failure accident

Method used

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  • Anti-galling thread grease and method of using the same
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  • Anti-galling thread grease and method of using the same

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Experimental program
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Effect test

Embodiment 1

[0045] An anti-galling thread grease of the present invention is composed of three components, wherein the mass ratio of the three components is A:B:C=1:2:4, in terms of mass percentage, component A includes a polyamide curing agent 40%, n-hexane 60%; component B includes epoxy resin 53%, nickel powder 9%, high-purity tungsten disulfide powder 33%, silicon nitride 3%, fumed silica 2%; component C includes titanium Base Grease 40%, Microcrystalline Graphite 5%, Silicon Carbide Whisker 10%, Graphite Powder 16%, PTFE Powder 15%, Nitinol 2%, Zinc Powder 12%.

[0046] According to the above component proportions, use the reaction kettle to mix the three components separately for use. When using, clean the surface of the oil casing thread first, then firstly brush the component B evenly on the outer thread surface of the oil casing, and then apply Component A is evenly painted to the thread surface that has been painted with component B. After painting component A, wait for 60 minut...

Embodiment 2

[0058] The anti-galling thread grease of the present invention is composed of three components, wherein the mass ratio of the three components is: A:B:C=0.8:1.6:4.2, in terms of mass percentage, component A includes polyamide 50% curing agent and 50% n-hexane; component B includes epoxy resin 47%, nickel powder 15%, high-purity tungsten disulfide powder 33%, silicon nitride 1%, fumed silica 3%; component C Including titanium base grease 50%, microcrystalline graphite 4%, silicon carbide whisker 7%, graphite powder 15%, PTFE powder 13%, Nitinol 1% and zinc powder 10%.

[0059] According to the above component proportions, use the reaction kettle to mix the three components separately for use. When using, clean the surface of the oil casing thread first, then firstly apply component B evenly to the outer thread surface of the oil casing, and then apply Component A is evenly brushed to the surface of the outer thread of the oil casing that has been painted with component B. After...

Embodiment 3

[0070] The novel anti-galling thread grease involved in the present invention is composed of three components, wherein the mass ratio of the three components is: A:B:C=1.1:2.2:4.2, in terms of mass percentage, component A includes poly Amide curing agent 30% and n-hexane 70%; component B includes epoxy resin 53%, nickel powder 11%, tungsten disulfide powder 33.7%, silicon nitride 1.3% and fumed silica 1%; component C includes Titanium-based grease 44%, microcrystalline graphite 4%, silicon carbide whisker 8%, graphite powder 16%, PTFE powder 14%, Nitinol 3%, zinc powder 11%.

[0071] According to the above component proportions, use the reaction kettle to mix the three components separately for use. When using, clean the surface of the oil casing thread first, then firstly apply component B evenly to the outer thread surface of the oil casing, and then apply Component A is evenly brushed to the surface of the outer thread of the oil casing that has been painted with component ...

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Abstract

The invention discloses an anti-galling thread grease, which includes component A, component B and component C, and the mass ratio of the three components is A:B:C=(0.8-1.1):(1.6-2.2): (3.6-4.2); in terms of mass percentage, component A includes 30%-50% of polyamide curing agent, 50%-70% of n-hexane; component B includes 47%-60% of epoxy resin, and 5% of nickel powder ~15%, tungsten disulfide powder 30%~40%, silicon nitride 1%~4%, fumed silica 1%~3%; component C includes titanium base grease 30%~50%, microcrystalline graphite 3%~7%, silicon carbide whisker 7%~13%, graphite powder 15%~23%, PTFE powder 13%~18%, nickel titanium alloy 1%~4%, zinc powder 10%~15% %. When using, first apply component B to the thread surface, and then apply component A to the thread surface painted by component B, the two will undergo a chemical curing reaction, forming a layer of lubricating coating on the thread surface. The coating has the advantage of strong surface adhesion, and then a layer of oil-based grease lubricating substance is applied on the surface of the lubricating coating to play the role of the oil-based grease lubricating material to physically block the thread leakage gap and spread it on the thread surface. The advantages.

Description

technical field [0001] The invention belongs to the technical field of oil casing thread grease, and particularly relates to an anti-sticking thread grease and a method for using the same. Background technique [0002] With the continuous development of oil and gas exploration and development, a large number of inclined wells, horizontal wells, extended-reach cluster wells, deep and ultra-deep wells, and gas storage wells have appeared in oilfield drilling. In the process of well construction, various factors such as complex formation conditions, harsh new drilling and completion conditions, imperfect pipe string design standards, improper casing material selection, unreasonable construction techniques and other factors may cause casing damage; Even if the casing meets the strength design requirements, the pipe string may be damaged due to thread leakage, pipe string corrosion or pipe string wear, and may also be caused by the load in all directions (tensile load, external e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M169/04C09J163/00C09J11/04
CPCC10M169/048C09J163/00C09J11/04C08K2003/3009C08K2003/0862C10M2217/044C10M2203/022C10M2209/102C10M2213/062C10M2201/05C10M2201/041C10M2201/10C10M2201/105C10M2201/065C08K13/04C08K3/08C08K3/30C08K3/34C08K7/26
Inventor 田峰刘强罗金恒李丽锋
Owner BC P INC CHINA NAT PETROLEUM CORP
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