CN104017631B - A kind of low moment of torsion packing grease of high-low temperature resistant and preparation method thereof - Google Patents
A kind of low moment of torsion packing grease of high-low temperature resistant and preparation method thereof Download PDFInfo
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Abstract
The present invention provides a kind of low moment of torsion packing grease of high-low temperature resistant and preparation method thereof, it is made up of the component of following weight percentage: basal liquid 70-90%, thickening agent 6-22%, wear-resistant seal additive 1-10%, antioxidant 1-10%, and above-mentioned each amounts of components sum is 100%.Owing to being all optimized in basal liquid, thickening agent, additive three, the low moment of torsion packing grease 60 task cone penetration of described high-low temperature resistant is 285-3501/10mm, using temperature range is-29 DEG C-121 DEG C, cold-starting moment of torsion when-40 DEG C is less than 0.5N.m, and preparation method is easy, there is wide market prospect, it is adaptable to oil-drilling field manifold and wellhead gate valve seal and use.
Description
Technical field
The invention belongs to technical field of petroleum extraction, be specifically related to a kind of parallel slide valve packing grease and preparation method thereof, more particularly, to a kind of low moment of torsion packing grease of high-low temperature resistant and preparation method thereof.
Background technology
In petroleum exploration and development process, in order to prevent underground fluid from invading in operation Wall of Cased Hole, always make the drilling fluid liquid column hydrostatic pressure in pit shaft slightly larger than strata pressure.In actual well drilled operation, often because of the change of various factors, make Oil/gas Well rated pressure control to be destroyed and cause blowout, now need to rely on well control device to implement kill-job operation, again recover the Stress control to Oil/gas Well.Once Oil/gas Well loses Stress control, at this moment it is accomplished by taking urgent emergency measures, Oil/gas Well is rescued.If well control device can not play a role, just very likely there is the great or extraordinarily serious safety accidents such as well kick blowout, Fire explosion.
Parallel slide valve, can effectively pressure release when Oil/gas Well loses Stress control and well kick blowout occurs as the significant components of drilling well control device and completion oil production equipment, it is to avoid catch fire, the security incident such as blast.And maintain the effective of parallel slide valve and open, the effect of slide valve stop-leak compound plays a key effect.Slide valve packing grease to keep two maximally effective functions, one be when low temperature can effectively start, two be start time moment of torsion as far as possible little, it is possible within the shortest time, meet valve opening when guarantee equipment is to Oil/gas Well pressure release and open rapidly pressure release.
The most key technological difficulties of parallel slide valve can effectively be opened pressure release when being exactly have an accident in drilling well control and completion oil recovery process and be reached the effect of security control accident, particularly properly functioning under low temperature state.Parallel slide valve, as the significant components of drilling well control device and completion oil production equipment, is optimized design and is conducive to the exploitation of petroleum drilling and mining new technique by parallel slide valve.For bad working environments such as the sulfide hydrogen of High Temperature High Pressure, high-temperature low-pressure, cryogenic high pressure or low-temp low-pressure, carbon dioxide, select a kind of can realize effectively lubricating, sealing grease fat it is critical that.The existence of packing grease will be effectively ensured in oil well control device parallel slide valve and effectively open in an emergency situation, so that well control device effectively runs.Now, the pivotal role of packing grease is, parallel slide valve to have good lubricity when low temperature, high-low pressure on the one hand；Parallel slide valve to ensure having good sealing when high temperature, high-low pressure on the other hand.How to handle parallel slide valve packing grease good lubricating properties under complex working condition well and sealing just becomes the key problem in technology of current well control device lubriation material.
Parallel slide valve, as one of oil drilling well control device and the topmost parts of completion oil production equipment, requires the features such as valve switch is light, rapid, have good sealing and moment of torsion with pressure is little when using under rated operating pressure state.And in the valve pocket of parallel slide valve, have to fill up packing grease, use the contact surface of lubrication flashboard and valve base chamber and ensure effectively to seal.Parallel slide valve is in during low temperature state (-29 DEG C～-46 DEG C), and packing grease there will be hardening, dry, poor fluidity, thus causing that parallel slide valve can not switch rapidly.When parallel slide valve is in the condition of high temperature (more than 121 DEG C) switch motion, packing grease has loss.Packing grease runs off on a small quantity and the sealability causing stop-leak compound is declined, it is impossible to ensure that parallel slide valve in use occurs without seepage；Packing grease loss too much will cause flashboard and valve base sealing is bad and frictional resistance increases, it is impossible to protect metallic sealing section preferably.Therefore need a kind of novel seal grease of research and development to meet low temperature effectively lubricating, the slide valve packing grease that high temperature effectively seals.
For different working conditions, there is considerable stop-leak compound product both at home and abroad, but product is nearly all meeting parallel slide valve performance requirement in a certain respect under actual condition, elevated-temperature seal performance deficiencies during lubrication is disclosure satisfy that under low-temperature condition, under high-temperature situation, disclosure satisfy that during sealing property, low temperature effectiveness is poor, unlatching moment of torsion is bigger than normal, has a strong impact on slide valve operation in an emergency situation.Need the grease that high/low temperature is all suitable on the market badly at present, namely can give that parallel slide valve high temperature effectively seals, low temperature effectively lubricating has the grease of low torque characteristics simultaneously, namely-40 DEG C of starting torques of low temperature are met less than 0.5N.m, high temperature of 120 DEG C pressure drop, less than 2Mpa, can seal by effectively lubricating within the scope of-29 DEG C～-46 DEG C.
Summary of the invention
The technical problem to be solved is for above shortcomings in prior art, a kind of low moment of torsion packing grease of high-low temperature resistant and preparation method thereof is provided, technique is simple, and the low moment of torsion packing grease of prepared high-low temperature resistant can be applicable to-29 DEG C～121 DEG C high/low temperature operating modes.
Solve the technology of the present invention problem and be the technical scheme is that the low moment of torsion packing grease of this high-low temperature resistant, be made up of the component of following weight percentage:
Above-mentioned each amounts of components sum is 100%；
Described basal liquid is become with 1-13 part alkyl methyl silicone oil, 1-5 part neopentyl polyol ester class line of oils by 1-30 part refine mineral oil 500SN, 1-10 part refine mineral oil 150BS, 1-22 part Oleum Verniciae fordii, 1-8 part Oleum Ricini by weight；
Described thickening agent is made up of 1-15 part bentonite and 1-5 part silica gel of being fuming by weight；
Described wear-resistant seal additive is made up of 1-5 part white carbon black and 1-5 part titanium dioxide of being fuming that polarizes by weight；
Described antioxidant is one or more in 1-10 part diphenylamines, 1-10 part alkylated diphenylamine, 1-10 part antioxidant T501.
Preferably, during described basal liquid 100 DEG C, kinematic viscosity is 30-100cSt, and viscosity index (VI) (VI) is not less than 120.
Preferably, described thickening agent granularity is that 320 mesh sieve percent of pass are not less than 80%, and 200 mesh sieve percent of pass are not less than 95%.
Preferably, described wear-resistant seal additive purity is not less than 98wt%, and granularity is that 320 mesh sieve percent of pass are not less than 80%, and 200 mesh sieve percent of pass are not less than 95%.Considering that drilling well control device and completion oil production equipment parallel slide valve are likely to the high pressure operating mode faced, pressure reaches 70-104Mpa sometimes, and the grease composition in valve body can be impacted, disperse by oil gas high pressure, thus reducing sealing property.The present invention adopts bentonite to be that main component is equipped with polarization white carbon black, titanium dioxide of being fuming etc. as wear-resistant seal additive simultaneously, change the problem that single thickening agent under high pressure sealing property that may be present is not enough, complex thickener and basal liquid reasonable compatibility simultaneously, effective uniform colloidal system can be formed under lower temperature, higher oil-air pressure situation, maintain parallel slide valve cold-starting moment of torsion little, the state that high pressure effectively seals.
By such scheme, described antioxidant is one or more in diphenylamines, alkylated diphenylamine, antioxidant T501.Consider that drilling well control device and completion oil production equipment parallel slide valve are likely to the erosion of the acid oil gas, drilling fluid, mud and the saline that face, adopt diphenylamines, alkylated diphenylamine, T501 or its mixture composition compound anti-oxidation anticorrosive additive, make parallel slide valve packing grease have long-acting anticorrosion, antioxidation characteristic under well control state.
The technical scheme of preparation method of the present invention is: the first step is at refining still internal modulation basal liquid, and second step carries out the preparation of thickening agent in refining still, the 3rd step additive adds and homogenizing, mill, degassed and packaging.
The process of described modulation basal liquid is: be sequentially added into refine mineral oil 500SN, refine mineral oil 150BS, Oleum Verniciae fordii, Oleum Ricini, alkyl methyl silicone oil and neopentyl polyol ester class oil according to above-mentioned metering in refining still, heating is to 50-60 DEG C, mediation stirs, it is subsequently adding viscosity and the viscosity index (VI) of refine mineral oil 150BS or alkyl methyl silicone oil adjustment basal liquid, to qualified stand-by；
The preparation process of described thickening agent is: to modulating qualified stand-by basal liquid heated and stirred in refining still, refining temperature in the kettle controls at 90-110 DEG C, mixing speed controls not higher than 80rpm, and it is added thereto to bentonite, fully dispersed in order to allow bentonite obtain, add dehydrated alcohol as dispersing aid, 30-45min is kept at maintaining 90-110 DEG C, make bentonite obtain fully dispersed allowing dehydrated alcohol add after obtaining effectively volatilization to be fuming silica gel under dehydrated alcohol dispersing aid exists simultaneously, stir formation homogeneous body, mixing time is not less than 30min, then with pump, the basic lubricating grease that basal liquid and thickening agent are mixed to form is gone to mediation still, in mediation still, basic lubricating grease is stirred circulation simultaneously；
Described additive adds and homogenizing, mill, degassed and packaging process is: basic lubricating grease be stirred being in harmonious proportion in still, circulate, heat, add wear-resistant seal additive and antioxidant, abundant circulation stirring, last homogenizing, mill, degassed, packaging is to finished product.
The technical characterstic that the present invention has: one is adopt compound basal liquid, while ensureing packing grease high-adhesiveness energy, maintains cryogenic property more excellent in wide temperature range, less starting torque；Two is adopt bentonite, silica gel, white carbon black etc. as complex thickener, makes composite foundation liquid and thickening agent form stable and excellent anti-dispersibility, maintains the sealing effectiveness under oil gas high pressure conditions；Three is adopt one in diphenylamines, alkylated diphenylamine, T501 or its mixture composition compound anti-oxidation anticorrosive additive, makes well control parallel slide valve packing grease maintain good antioxidation resistance to corrosion under complicated acid oil gas operating mode.
The invention has the beneficial effects as follows:
1. adopt the synthetic ester lubricant of different viscosities grade, refine mineral wet goods to carry out being deployed into compound basal liquid, the difference of different classes of molecular weight of material and allotment ratio is utilized to efficiently solve the problem of dissolving each other of the final each component of compound prescription basal liquid, make final composite foundation liquid have the high/low temperature stability of high viscosity index (VI) and flash-point and excellence, be particularly suitable for wide temperature range well control working environment.
2. adopt complex thickener, make grease have excellent sealing property, high oil-air pressure shock resistance, erosion resistance, be effectively prevented from well control high pressure lower valve and seal not enough problem.
3. the amine type that adopts, the cooperative effect of phenolic or phenol amine type antioxygen anticorrosive additive, can effectively overcome modern oil-gas mining process is likely to face acid oil gas, drilling fluid, mud, water the anticorrosive shock problem such as erosion.
The present invention uses relatively simple and easy method to prepare the low moment of torsion packing grease of high-low temperature resistant, prepared packing grease 60 task cone penetration is 285-3501/10mm, can effectively lubricating and sealing in temperature range-29 DEG C～121 DEG C, elevated-temperature seal performance pressures drops less than 2Mpa, and low temperature (-40 DEG C) starting torque is less than 0.5N.m.
Detailed description of the invention
For making those skilled in the art be more fully understood that technical scheme, below in conjunction with embodiment, the present invention is described in further detail.
The embodiment of the present invention provides a kind of packing grease material with good high and low temperature resistance.Basal liquid used by the present invention is commercial grade, several mineral oil, artificial oil is adopted to be composited: to be become with 1-5 part neopentyl polyol ester class line of oils by 1-30 part refine mineral oil 500SN, 1-10 part refine mineral oil 150BS, 1-22 part Oleum Verniciae fordii, 1-8 part Oleum Ricini, 1-13 part alkyl methyl silicone oil by weight, when 100 DEG C, kinematic viscosity is 30-100cSt, and viscosity index (VI) (VI) is not less than 120.
Thickening agent granularity used is that 320 mesh sieve percent of pass are not less than 80%, and 200 mesh sieve percent of pass are not less than 95%, is made up of 1-15 part bentonite and 1-5 part silica gel of being fuming by weight.
Wear-resistant seal additive effective content used is not less than 98wt%, and granularity is that 320 mesh sieve percent of pass are not less than 80%, and 200 mesh sieve percent of pass are not less than 95%, is polarized white carbon black by 1-5 part by weight and 1-5 part titanium dioxide of being fuming forms.
Antioxidant used is one or more in 1-10 part diphenylamines, 1-10 part alkylated diphenylamine, 1-10 part antioxidant T501.
Embodiment 1
500SN refine liquefaction 28 parts it is separately added into by weight in refining still, stir and interval adds 150BS bright stock 10 parts, industry Oleum Verniciae fordii 20 parts, industry Oleum Ricini 5 parts and alkyl methyl silicone oil 10 parts for 5 minutes successively, 2 parts of neopentyl polyol ester class oil heat 50-60 DEG C and are sufficiently stirred for, its viscosity of sampling and measuring, controlling its viscosity at 100 DEG C of kinematic viscositys is 55-60cSt, 100 DEG C of viscosity of intermediate control analysis, are respectively adopted increase 150BS bright stock or silicone oil ratio to regulate 100 DEG C of kinematic viscositys of composite foundation liquid.Heating refining still is continued after stirring, temperature in the kettle is made to control at 90-110 DEG C, mixing speed controls not higher than 80rpm, and it is added thereto to 12 parts of bentonite, fully dispersed in order to allow bentonite obtain, add 3 parts of dehydrated alcohol as dispersing aid, 30-45min is kept to make dehydrated alcohol volatilize at maintaining 90-110 DEG C, it is subsequently adding 3 parts of silica gel of being fuming, stirring is lower so as to fully merge, mixing time is not less than 30min, then with pump, the basic lubricating grease that basal liquid and thickening agent are mixed to form is gone to mediation still, it is sequentially added into titanium dioxide 3 parts of being fuming, polarization white carbon black 4 parts, diphenylamines 1 part, 1 part and 1 part T501 antioxidant of alkylated diphenylamine, abundant circulation stirring, last homogenizing, mill, degassed, it is packaged to be the low moment of torsion packing grease of high-low temperature resistant.
The low moment of torsion packing grease of high-low temperature resistant prepared by the present embodiment is tested, 3411/10mm when its 60 task cone penetration is 25 DEG C, and dropping point is 320 DEG C, and the cold-starting moment of torsion of-40 DEG C is 0.38N.m.
Embodiment 2
500SN refine liquefaction 27 parts it is separately added into by weight in refining still, stir and interval adds 150BS bright stock 10 parts, industry Oleum Verniciae fordii 18 parts, industry Oleum Ricini 7 parts and alkyl methyl silicone oil 9 parts for 5 minutes successively, 3 parts of neopentyl polyol ester class oil heat 50-60 DEG C and are sufficiently stirred for, its viscosity of sampling and measuring, controlling its viscosity at 100 DEG C of kinematic viscositys is 48-57cSt, 100 DEG C of viscosity of intermediate control analysis, are respectively adopted increase 150BS bright stock or silicone oil ratio to regulate 100 DEG C of kinematic viscositys of composite foundation liquid.Heating refining still is continued after stirring, temperature in the kettle is made to control at 90-110 DEG C, mixing speed controls not higher than 80rpm, and it is added thereto to 11 parts of bentonite, fully dispersed in order to allow bentonite obtain, add 3 parts of dehydrated alcohol as dispersing aid, 30-45min is kept to make dehydrated alcohol volatilize at maintaining 90-110 DEG C, it is subsequently adding 4 parts of silica gel of being fuming, stirring is lower so as to fully merge, mixing time is not less than 30min, then with pump, the basic lubricating grease that basal liquid and thickening agent are mixed to form is gone to mediation still, it is sequentially added into titanium dioxide 4 parts of being fuming, polarization white carbon black 3 parts, diphenylamines 1 part, alkylated diphenylamine 2 parts, abundant circulation stirring, last homogenizing, mill, degassed, it is packaged to be the low moment of torsion packing grease of high-low temperature resistant.
Adopting the low moment of torsion packing grease of high-low temperature resistant that the present embodiment is prepared by the method identical with embodiment one to test, 3361/10mm when its 60 task cone penetration is 25 DEG C, dropping point is 315 DEG C, the cold-starting moment of torsion 0.41N.m of-40 DEG C.
Embodiment 3
500SN refine liquefaction 29 parts it is separately added into by weight in refining still, stir and interval adds 150BS bright stock 9 parts, industry Oleum Verniciae fordii 21 parts, industry Oleum Ricini 4 parts and alkyl methyl silicone oil 11 parts for 5 minutes successively, 1 part of neopentyl polyol ester class oil heats 50-60 DEG C and is sufficiently stirred for, its viscosity of sampling and measuring, controlling its viscosity at 100 DEG C of kinematic viscositys is 58-65cSt, 100 DEG C of viscosity of intermediate control analysis, are respectively adopted increase 150BS bright stock or silicone oil ratio to regulate 100 DEG C of kinematic viscositys of composite foundation liquid.Heating refining still is continued after stirring, temperature in the kettle is made to control at 90-110 DEG C, mixing speed controls not higher than 80rpm, and it is added thereto to 13 parts of bentonite, fully dispersed in order to allow bentonite obtain, add 3 parts of dehydrated alcohol as dispersing aid, 30-45min is kept to make dehydrated alcohol volatilize at maintaining 90-110 DEG C, it is subsequently adding 2 parts of silica gel of being fuming, stirring is lower so as to fully merge, mixing time is not less than 30min, then with pump, the basic lubricating grease that basal liquid and thickening agent are mixed to form is gone to mediation still, it is sequentially added into titanium dioxide 5 parts of being fuming, polarization white carbon black 2 parts, 1 part and 2 parts T501 antioxidant of diphenylamines, abundant circulation stirring, last homogenizing, mill, degassed, it is packaged to be the low moment of torsion packing grease of high-low temperature resistant
Adopting the low moment of torsion packing grease of high-low temperature resistant that the present embodiment is prepared by the method identical with embodiment one to test, 3361/10mm when its 60 task cone penetration is 25 DEG C, dropping point is 335 DEG C, the cold-starting moment of torsion 0.29N.m of-40 DEG C.
By the above detailed description to the embodiment of the present invention, it will be seen that the invention solves conventional hermetic grease can not meet the problem used under high/low temperature operating mode simultaneously, prepared packing grease 60 task cone penetration is 285-3501/10mm, using temperature range is-29 DEG C-121 DEG C, the cold-starting moment of torsion of-40 DEG C is less than 0.5N.m, and preparation method is easy, has wide market prospect, it is adaptable to oil-drilling field manifold and wellhead gate valve seal and use.
It is understood that the principle that is intended to be merely illustrative of the present of embodiment of above and the illustrative embodiments that adopts, but the invention is not limited in this.For those skilled in the art, without departing from the spirit and substance in the present invention, it is possible to make various modification and improvement, these modification and improvement are also considered as protection scope of the present invention.
Claims (5)
1. the low moment of torsion packing grease of high-low temperature resistant, it is characterised in that be made up of the component of following weight percentage:
Described basal liquid is become with 1-5 part neopentyl polyol ester class line of oils by 1-30 part refine mineral oil 500SN, 1-10 part refine mineral oil 150BS, 1-22 part Oleum Verniciae fordii, 1-8 part Oleum Ricini, 1-13 part alkyl methyl silicone oil by weight；
Described thickening agent is made up of 1-15 part bentonite and 1-5 part silica gel of being fuming by weight；
Described wear-resistant seal additive is made up of 1-5 part white carbon black and 1-5 part titanium dioxide of being fuming that polarizes by weight；
Described antioxidant is one or more in 1-10 part diphenylamines, 1-10 part alkylated diphenylamine, 1-10 part antioxidant T501.
2. the low moment of torsion packing grease of high-low temperature resistant according to claim 1, it is characterised in that: during described basal liquid 100 DEG C, kinematic viscosity is 30-100cSt, and viscosity index (VI) is not less than 120.
3. the low moment of torsion packing grease of high-low temperature resistant according to claim 1, it is characterised in that: described thickening agent granularity is that 320 mesh sieve percent of pass are not less than 80%, and 200 mesh sieve percent of pass are not less than 95%.
4. the low moment of torsion packing grease of high-low temperature resistant according to claim 1, it is characterised in that: described wear-resistant seal additive effective content is not less than 98wt%, and granularity is that 320 mesh sieve percent of pass are not less than 80%, and 200 mesh sieve percent of pass are not less than 95%.
5. the preparation method of the arbitrary described low moment of torsion packing grease of high-low temperature resistant of claim 1-4, it is characterized in that the first step is at refining still internal modulation basal liquid, second step carries out the preparation of thickening agent in refining still, the 3rd step additive adds and homogenizing, mill, degassed and packaging.
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| CN106242093A (en) * | 2016-10-13 | 2016-12-21 | 王兴民 | A kind of water process corrosion inhibiting and descaling agent and its preparation method and application |
| CN108102184A (en) * | 2018-02-06 | 2018-06-01 | 大庆高新区鼎久化工科技有限公司 | All-season tests sealant and preparation method and process units |
| CN109181822A (en) * | 2018-08-29 | 2019-01-11 | 佛山朝鸿新材料科技有限公司 | A kind of Hmp grease |
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| US7171110B1 (en) * | 2001-11-30 | 2007-01-30 | Keen Personal Media, Inc. | System and a method for storing audio/video programs on a hard disk drive for presentation to a viewer |
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Effective date of registration: 20161228 Address after: The Chinese science and Technology Park East Lake New Technology Development Zone in Hubei province Wuhan City Road 430223 No. 5 Patentee after: Jianghan Petroleum Drilling Bit Co., Ltd. Patentee after: Changsha Zhongcheng Petrochemical Co., Ltd. Address before: 430223 Hubei city of Wuhan province science and Technology Park East Lake New Technology Development Zone, Road No. five Patentee before: Jianghan Petroleum Drilling Bit Co., Ltd. |
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Effective date of registration: 20180214 Address after: 430223, No. 5, Chinese workers' garden, Temple Hill community, East Lake New Technology Development Zone, Wuhan, Hubei Co-patentee after: SINOPEC OILFIELD EQUIPMENT CORPORATION Patentee after: Kingdream Sinopec Petroleum Machinery Co. Ltd. Co-patentee after: Changsha Zhongcheng Petrochemical Co., Ltd. Address before: The Chinese science and Technology Park East Lake New Technology Development Zone in Hubei province Wuhan City Road 430223 No. 5 Co-patentee before: Changsha Zhongcheng Petrochemical Co., Ltd. Patentee before: Jianghan Petroleum Drilling Bit Co., Ltd. |