CN1804014A - Dedicated thread compound for casing drilling - Google Patents
Dedicated thread compound for casing drilling Download PDFInfo
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- CN1804014A CN1804014A CN 200510127806 CN200510127806A CN1804014A CN 1804014 A CN1804014 A CN 1804014A CN 200510127806 CN200510127806 CN 200510127806 CN 200510127806 A CN200510127806 A CN 200510127806A CN 1804014 A CN1804014 A CN 1804014A
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Abstract
The invention relates to a screw-thread grease for casing well drilling, wherein the constituents include (by weight percent): molybdenum disulfide composite lithium-based grease 10-50%, expanded graphite 10-30%, copper powder 1-10%, zinc powder 0-30%, lead powder 0-40%, magnesium sulfonate 0.1-5%, SP-80 0.1-8%, dimethyl silicon oil 0.1-5%, polytetrafluoroethylene 0-12%, gas phase silicon dioxide 1-15%. The screw-thread grease is prepared by using thickened mineral oil as carrying agent, charging solid substance, bulking agent, expanded graphite sealing material, then carrying out homogenization.
Description
Technical field
The present invention relates to the sealing thread compound that uses on a kind of petroleum drilling tubing string, the particularly thread compound of the sleeved of casing drilling special use, and the method for preparation.
Background technology
Casing drilling has caused the great attention of domestic and international petroleum drilling industry as a kind of very novel and creative new technology.Casing drilling has changed the conventional drilling mode of operation, and promptly the string of casing lower end connects drill bit, drives the rotation of string of casing and drill bit, the broken rock in down-hole is crept into casing job finish synchronously.Casing drilling has drilling well, the incorporate technical characterictic of completion, has the drilling engineering of reduction expense, can reduce down hole problem and drilling failure again and take place.A large amount of casing drilling practices show casing drilling escapable cost 10-15%, particularly land drilling well, escapable cost 30-50%.Therefore, casing drilling has great effect as a new technology to the development of petroleum industry, and the particularly saturating property of shallow low permeability hydrocarbon-bearing pool as oil fields such as China's grand celebration, the Liaohe River, Jilin, long celebratings, utilizes the Casing Drilling Technique advantage very big, and prospect is very considerable.
At present, casing drilling also relates to many gordian techniquies except needs corresponding apparatus and instrument, as casing threads strength of joint, anti-stick button performance etc.Drilling process middle sleeve post need bear tensile, compressive, bending, turn round four kinds of combined loads, the sleeve pipe that requires the casing drilling use is except screw thread itself must be special button, also must use the special thread fat of anti-high moment of torsion, anti-stick button performance, could satisfy in the drilling process and the requirements such as stopping property of finishing drilling rear sleeve post.Practice shows, can the performance of casing threads connecting portion be one of the gordian technique that carry out smoothly of restriction casing drilling, and critical material---the thread compound as improving the casing threads switching performance seems particularly important in casing drilling.
Casing Drilling Technique is to utilize string of casing that moment of torsion is sent to the shaft bottom, carries out rock-breaking and well-drilling, and the screw connection point of string of casing is wanted to bear and to transmit very high moment of torsion, requires well casing to adopt special thread, also will use high moment of torsion thread compound; On the other hand, relate to the influence of many-sided factors such as geology, technology, equipment in the casing drilling construction, can run into some complexcase unavoidably, be forced to sometimes the well casing post is tripped out from well.String of casing is after bearing long-time drilling well moving load, particularly bearing the torque load process like this, go up, the shackle operation.This has higher requirement to casing threads fat, not only will possess the auxiliary seal effect, more will possess the anti-stick button performance under high torque condition.The casing threads fat that present domestic casing drilling adopted has the ordinary casing stop-leak compound, and the conventional drilling thread compound is also arranged.Can not satisfy above-mentioned casing drilling particular requirement.
Summary of the invention
The purpose of this invention is to provide a kind of dedicated thread compound for casing drilling, both be different from conventional oil casing threads fat, be different from the dedicated thread compound for casing drilling of conventional drilling tool again with thread compound.It is a kind of dedicated thread compound that satisfies the technical requirements of casing drilling.This invention mainly solves the influence of complex loads such as the casing drilling string of casing bears tensile, compressive, bending, turns round, vibration and makes casing threads generation thread gluing phenomenon easily, and the exploitation dedicated thread compound for casing drilling.Require this thread compound in the casing drilling process, to have good torque resistant characteristic, have good sealing characteristics after the finishing drilling again.Therefore, we can say that it should possess the performance of the anti-load of drilling tool thread compound, has both the sealing property of casing threads fat again.
Another object of the present invention provides the preparation method of dedicated thread compound for casing drilling.
The technical solution used in the present invention is: the weight percent of each component of dedicated thread compound for casing drilling of the present invention is: molybdenumdisulphide compositing lithio ester, 10-50%; Expansible black lead, 10-30%; Copper powder, 1-10%; Zinc powder, 5-30%; Lead powder, 5-40%; Sulfonic acid magnesium, 0.1-5%; Anhydro sorbitol acid anhydride list olein, 0.1-8%; Dimethyl silicone oil, 0.1-5%; Aerosil, 1-15%; Poly-four Buddhist ethene 0-12%.
The molybdenumdisulphide compositing lithio ester, there is sale in market.Expansible black lead is a kind ofly crystalline flake graphite to be compressed into after through 1100 ° of-1200 ℃ of expansions of heating bar-shaped, and then machining becomes vermiform, and promptly diameter is 0.5-1mm, and length is the solid lubricant of 1-3mm.The copper powder granularity is at 200 orders; Zinc powder particle size is at 325 orders; The lead powder granularity is at 200 orders.Aerosil plays the multiviscosisty stabilizer function, and there is sale in market.Anticorrosion compound comprises sulfonic acid magnesium, anhydro sorbitol acid anhydride list olein, and defoamer is a dimethyl silicone oil.
The preparation method: at first, the preparation expansible black lead.The expansible black lead preparation method is compressed into bar-shaped solid lubrication sealing agent with crystalline flake graphite after heating 1100 ° of-1200 ℃ of expansions, machining becomes vermiform again, be that diameter is 0.5-1mm, length is the solid lubrication sealing agent of 1-3mm, obtains required expansible black lead.Then, can add the molybdenumdisulphide compositing lithio ester that will add in the above-mentioned prescription in the speed governing stirred autoclave at one, the beginning stirring at low speed, adds each component by formula rate at 20-40 minute stirring at normal temperature time in batches.Stir while adding.After stirring, with colloidal mill or three-roll grinder or the machine that homogenizes it is ground evenly once more and can obtain thread compound of the present invention.
The difference of dedicated thread compound for casing drilling and conventional drilling thread compound is as shown in the table.
| Dedicated thread compound for casing drilling | The conventional drilling thread compound | |
| 1 | Guarantee the sealing property of anti-load of casing drilling and finishing drilling rear sleeve post, increase dynamic friction coefficient, the back that prevents to be hampered in the drilling process is loosening at the effect running casing screw thread of reactive torque. | Guarantee the anti-load of drilling well, increase dynamic friction coefficient, the back that prevents to be hampered in the drilling process is loosening at the effect running casing screw thread of reactive torque. |
| 2 | Add a certain amount of metal powder to guarantee to go up the lubricity in the button process, prevent the thread gluing phenomenon in the button process on the sleeve pipe. | Need not add too much metal powder, only need add a small amount of zinc powder and play the lubrication assistant sealing function.Add a large amount of Graphite Powder 99s, mica powder to reduce production costs. |
| 3 | Because solid packing is far longer than the thread compound of present use, solids content is higher than regular screw threads fat, so increase anti-stick button, anti-engagement property. | |
| 4 | Adding expanded graphite packing improves frictional coefficient and increases sealing property. |
Dedicated thread compound for casing drilling tool provided by the invention is a kind of black paste, is applied directly to drilling well with on telescopic internal thread or the outside screw, goes up button according to certain moment of torsion then and gets final product.
Beneficial effect of the present invention: extraordinary graphite provided by the present invention has lubricated, sealing two big functions, graphite itself has extraordinary oilness, graphite often is made into graphite sheet, graphite rope etc. as sealing material the time, and mainly utilizes its oilness as the graphite of compound.The good sealing characteristics that the present invention utilizes expansible black lead to have, in dedicated thread compound for casing drilling, add vermiform (diameter 0.5-1mm, length 1-3mm) expansible black lead, this kind graphite material has good rebound resilience, general rebound degree is about 20%, so it has good sealing characteristics and lubricating property.Do not see at present the domestic relevant report of utilizing expansible black lead as lock packing.This special graphite be with crystalline flake graphite through adding be compressed into after the thermal expansion bar-shaped, and then the machining additive that becomes vermiform to form, that the adding of this extraordinary graphite has is lubricated, the double effects of sealing.
Thread compound provided by the present invention is to research and develop on the basis of API thread compound, except satisfying all performances of API standard, lubricated, sealing property aspect be better than the API thread compound, and rheological, the heat-resisting property of this thread compound are very good, no matter during the broiling summer or in winter of cold, have easy coating, easy to use.
Thread compound provided by the present invention is cheap because of raw materials cost, and preparation technology is simple, and is easy to use, and therefore, comprehensive cost is low, can satisfy the low-cost requirement of drilling well.
Embodiment
Embodiment 1:
3
#Molybdenumdisulphide compositing lithio ester 36%, expansible black lead 18%, 325 order zinc powder 12%, 200 order copper powder 3%, 200 order lead powder 23%, sulfonic acid magnesium 2%, anhydro sorbitol acid anhydride list olein 1%, aerosil 3%, dimethyl silicone oil 2%.
Technical indicator is carried out Performance Detection according to industry standard SY5199, and the result is as shown in table 2.
Table 1 embodiment 1 performance test results table
| Test item | Detected result | Use instrument | Detector bar |
| Appearance color | The black paste | Range estimation | Room temperature |
| Drawing cone in-degree (1/10mm), 150g | 318 | SYP4001Z cone penetration tester, refrigerator | 25℃ |
| 240 | -17.8℃ | ||
| Dropping point ℃ | 181 | SYP4111 thread compound drop point test device | Room temperature |
| Steam output V/V% | 0.51 | DGSB/20 -002C | 100℃，24h |
| Divide oil mass V/V% | 1.07 | 100℃，24h |
| Corrodibility | There is not the corrosion trace under the prescribed condition | 100℃，3h | ||
| Thermostability | The moisture oil mass | 0 | 138℃，24h | |
| The heat loss amount | 1.89 | |||
| The brushing performance | Can brushing | Refrigerator | -17.8℃ | |
| Water leaching % | 0.94 | Water leaching tester | 66℃，2h | |
| Ease tolerance ml | 3.15 | Ease tolerance tester | 65℃，120h | |
| Density g/ml | 1.89 | A/D FR-300 electronic balance | Room temperature | |
This prescription is on probation through on-the-spot 85 mouthfuls of wells, can satisfy 2000 meters needs with interior casing drilling, and concerning Φ 139.7 * 9.17P110 steel-grade bushing, its torque resistant reaches 20000 Ns more than the rice; Favorable sealing property.135 ℃ of high temperature resistances.
Embodiment 2:3
#Molybdenumdisulphide compositing lithio ester 36%, expansible black lead 29%, 325 order zinc powder 12%, 200 order copper powder 3%, 200 order lead powder 5%, poly-four Buddhist ethene 7%, sulfonic acid magnesium 2%, anhydro sorbitol acid anhydride list olein 1%, aerosil 3%, dimethyl silicone oil 2%.
Technical indicator is carried out Performance Detection according to industry standard SY5199, and the result is as shown in table 3.
Table 2 embodiment 2 performance test results tables
| Test item | Detected result | Use instrument | Detector bar | |
| Appearance color | The black paste | Range estimation | Room temperature | |
| Drawing cone in-degree (1/10mm), 150g | 312 | SYP4001Z cone penetration tester, refrigerator | 25℃ | |
| 253 | -17.8℃ | |||
| Dropping point ℃ | 178 | SYP4111 thread compound drop point test device | Room temperature | |
| Steam output V/V% | 0.63 | The desk-top loft drier of DGSB/20-002C | 100℃，24h | |
| Divide oil mass V/V% | 1.69 | 100℃，24h | ||
| Corrodibility | There is not the corrosion trace under the prescribed condition | 100℃，3h | ||
| Thermostability | The moisture oil mass | 0 | 138℃，24h | |
| The heat loss amount | 1.56 | |||
| The brushing performance | Can brushing | Refrigerator | -17.8℃ |
| Water leaching % | 1.08 | Water leaching tester | 66℃，2h |
| Ease tolerance ml | 2.67 | Ease tolerance tester | 65℃，120h |
| Density g/ml | 1.76 | A/D FR-300 electronic balance | Room temperature |
This prescription belongs to unleaded thread compound, environmentally safe.
This prescription is on probation through on-the-spot 34 mouthfuls of wells, can satisfy 1000 meters needs with interior casing drilling, and concerning Φ 139.7 * 7.72P110 steel-grade bushing, its torque resistant reaches 15000 Ns more than the rice; Favorable sealing property.120 ℃ of high temperature resistances.
Claims (5)
1, a kind of dedicated thread compound for casing drilling is characterized in that: the weight percent of each component is: molybdenumdisulphide compositing lithio ester, 10-50%; Expansible black lead, 10-30%; Copper powder, 1-10%; Zinc powder, 5-30%; Lead powder, 0-40%; Sulfonic acid magnesium, 0.1-5%; Anhydro sorbitol acid anhydride list olein, 0.1-8%; Dimethyl silicone oil, 0.1-5%; Poly-four Buddhist ethene 0-12%; Aerosil, 1-15%.
2, dedicated thread compound for casing drilling as claimed in claim 1 is characterized in that: the copper powder granularity is at 200 orders; Zinc powder particle size is at 325 orders; The lead powder granularity is at 200 orders.
3, dedicated thread compound for casing drilling as claimed in claim 1 or 2 is characterized in that: the molybdenumdisulphide compositing lithio ester is 3
#The molybdenumdisulphide compositing lithio ester.
4, dedicated thread compound for casing drilling as claimed in claim 1 or 2 is characterized in that: the weight percent of each component is: 3
#Molybdenumdisulphide compositing lithio ester 36%, expansible black lead 18%, 325 order zinc powder 12%, 200 order copper powder 3%, 200 order lead powder 23%, sulfonic acid magnesium 2%, anhydro sorbitol acid anhydride list olein 1%, aerosil 3%, dimethyl silicone oil 2%.
5, a kind of working method of dedicated thread compound for casing drilling is characterized in that: at first, and the preparation expansible black lead; The expansible black lead preparation method be will crystalline flake graphite through being compressed into bar-shaped solid lubrication sealing agent after 1100 ° of-1200 ℃ of expansions of heating, and then machining becomes vermiform, i.e. diameter 0.5-1mm, the solid lubricant of length 1-3mm; Then, can add the molybdenumdisulphide compositing lithio ester that will add in the above-mentioned prescription in the speed governing stirred autoclave at one, the beginning stirring at low speed, adds each component by formula rate at 20-40 minute stirring at normal temperature time in batches; Stir while adding, after stirring, with colloidal mill or three-roll grinder or the machine that homogenizes it is ground evenly once more and can obtain thread compound of the present invention.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101278068A CN100348707C (en) | 2005-12-06 | 2005-12-06 | Dedicated thread compound for casing drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101278068A CN100348707C (en) | 2005-12-06 | 2005-12-06 | Dedicated thread compound for casing drilling |
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| CN1804014A true CN1804014A (en) | 2006-07-19 |
| CN100348707C CN100348707C (en) | 2007-11-14 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011093963A (en) * | 2009-10-27 | 2011-05-12 | Jx Nippon Oil & Energy Corp | Extreme pressure lubricant composition |
| CN101775265B (en) * | 2009-01-09 | 2012-08-15 | 中国石油天然气集团公司 | High-airtight thread sealing grease |
| CN101565648B (en) * | 2009-05-21 | 2012-12-26 | 天津钢管集团股份有限公司 | API oil sleeve thread sealing grease composite and preparation method thereof |
| CN103555405A (en) * | 2013-11-11 | 2014-02-05 | 浙江金洲管道工业有限公司 | Special thread compound for expansion pipe and preparation method thereof |
| CN105238529A (en) * | 2015-10-29 | 2016-01-13 | 山东万友工业油脂有限公司 | Molybdenum disulfide lithium-based lubricating grease and preparation method therefor |
| CN107129857A (en) * | 2017-05-31 | 2017-09-05 | 江苏海川卓越密封材料有限公司 | Wear-resisting environment-friendly type stop-leak compound of antirust and preparation method thereof |
| CN112175700A (en) * | 2020-10-12 | 2021-01-05 | 娄睿 | Improved drilling tool thread sealing grease and preparation method thereof |
| CN112608781A (en) * | 2020-12-08 | 2021-04-06 | 武汉博达特种润滑技术有限公司 | Rod-shaped valve rod sealant composition and preparation method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| HRP960524A2 (en) * | 1996-11-07 | 1999-02-28 | Januueić Nikola | Lubricant for threaded joints based on solid lubricants and a process for the preparation thereof |
| CN100543098C (en) * | 2001-03-07 | 2009-09-23 | 李筠 | Oil sleeve thread sealing grease |
-
2005
- 2005-12-06 CN CNB2005101278068A patent/CN100348707C/en active Active
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101775265B (en) * | 2009-01-09 | 2012-08-15 | 中国石油天然气集团公司 | High-airtight thread sealing grease |
| CN101565648B (en) * | 2009-05-21 | 2012-12-26 | 天津钢管集团股份有限公司 | API oil sleeve thread sealing grease composite and preparation method thereof |
| JP2011093963A (en) * | 2009-10-27 | 2011-05-12 | Jx Nippon Oil & Energy Corp | Extreme pressure lubricant composition |
| CN103555405A (en) * | 2013-11-11 | 2014-02-05 | 浙江金洲管道工业有限公司 | Special thread compound for expansion pipe and preparation method thereof |
| CN103555405B (en) * | 2013-11-11 | 2015-06-17 | 浙江金洲管道工业有限公司 | Special thread compound for expansion pipe and preparation method thereof |
| CN105238529A (en) * | 2015-10-29 | 2016-01-13 | 山东万友工业油脂有限公司 | Molybdenum disulfide lithium-based lubricating grease and preparation method therefor |
| CN107129857A (en) * | 2017-05-31 | 2017-09-05 | 江苏海川卓越密封材料有限公司 | Wear-resisting environment-friendly type stop-leak compound of antirust and preparation method thereof |
| CN112175700A (en) * | 2020-10-12 | 2021-01-05 | 娄睿 | Improved drilling tool thread sealing grease and preparation method thereof |
| CN112175700B (en) * | 2020-10-12 | 2022-08-02 | 娄睿 | Improved drilling tool thread sealing grease and preparation method thereof |
| CN112608781A (en) * | 2020-12-08 | 2021-04-06 | 武汉博达特种润滑技术有限公司 | Rod-shaped valve rod sealant composition and preparation method thereof |
| CN112608781B (en) * | 2020-12-08 | 2022-07-19 | 武汉博达特种润滑技术有限公司 | Rod-shaped valve rod sealant composition and preparation method thereof |
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| CN100348707C (en) | 2007-11-14 |
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