CN106244125A - Unfreezing for the solid stuck glue part of down-hole bridging plug/packer disappears solvent - Google Patents
Unfreezing for the solid stuck glue part of down-hole bridging plug/packer disappears solvent Download PDFInfo
- Publication number
- CN106244125A CN106244125A CN201610740429.3A CN201610740429A CN106244125A CN 106244125 A CN106244125 A CN 106244125A CN 201610740429 A CN201610740429 A CN 201610740429A CN 106244125 A CN106244125 A CN 106244125A
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- solvent
- packer
- bridging plug
- disappears
- unfreezing
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/524—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning organic depositions, e.g. paraffins or asphaltenes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/02—Spotting, i.e. using additives for releasing a stuck drill
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention discloses a kind of unfreezing for the solid stuck glue part of down-hole bridging plug/packer to disappear solvent, mixed by the following component of by volume percentages: ethyl acetate 25% 35%, acetone 25% 35%, normal propyl alcohol 35% 45%, preparation method of the present invention is simple, being suitable for execute-in-place, last solution removes bridging plug or the jam of packer and trips out pit shaft smoothly.
Description
Technical field
The invention belongs to oil-gas field development field, a kind of unfreezing for the solid stuck glue part of down-hole bridging plug/packer
Disappear solvent.
Technical background
In oil gas (water) well production process, generally use packer, the instrument of bridging plug class carries out being layered, insulate, block
Reservoir and pit shaft, the critical piece of its sealing function is exactly rubber.If to enter the well time longer for bridging plug and packer in well,
Under pit shaft high temperature and high pressure environment, its cartridge can occur swelling aging, hardness to rise, intensity and flexibility decrease, at needs
When releasing closure, tend to occur instrument deblocking difficulty, packing element (part) cannot shrink, draw the situations such as anti-glue part, causes tubing string at well
The interior rubber parts by breakage fixes, and causes bridging plug or packer jam cannot normally unseal salvaging, meanwhile, in lifting activity repeatedly
Tubing string so that the abrasion of glue part and during unfreezing, oil column fatigue can be caused again impaired, easily formation accident, add pit shaft complex situations
Risk, substantially prolongs construction period.
Summary of the invention
The technical problem to be solved is to provide a kind of unfreezing for the solid stuck glue part of down-hole bridging plug/packer
Disappear solvent, under conditions of the solvent that disappears is fully contacted with rubber parts, effectively can soften dissolving rubber part in 24 hours, and to gold
Belong to corrosion-free injury.
In order to solve above-mentioned technical problem, the technical solution used in the present invention is: a kind of solid for down-hole bridging plug/packer
The unfreezing of stuck glue part disappears solvent, the following component of by volume percentages mix:
Ethyl acetate 25%-35%
Acetone 25%-35%
Normal propyl alcohol 35%-45%
Preferably, the following component of by volume percentages mix:
Ethyl acetate 30%
Acetone 30%
Normal propyl alcohol 40%.
The invention has the beneficial effects as follows: preparation method is simple, being suitable for execute-in-place, last solution removes bridging plug or the card of packer
Resistance also trips out pit shaft smoothly.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention is described in further detail:
The unfreezing for the solid stuck glue part of down-hole bridging plug/packer of the present invention disappears solvent, by under by volume percentages
Row component mixes:
Ethyl acetate 25%-35%
Acetone 25%-35%
Normal propyl alcohol 35%-45%
Preferably, the following component of by volume percentages mix:
Ethyl acetate 30%
Acetone 30%
Normal propyl alcohol 40%.
In the present invention, ethyl acetate, acetone, normal propyl alcohol are as organic solvent, have different types of rubber the most prominent
Dissolving advantage, such as: ethyl acetate has preferable dissolubility to nitrile rubber, nitrile rubber is room temperature bridging plug and packer rubber
The raw material of bucket, the functional group in nitrile rubber is C=N, and the functional group in ethyl acetate is C=O, C=N and C=O chemical bond body
Being identical, being in covalent bond, and double bond is all a σ key and a π key, and C=N chemical bond lengths is 127pm, C=O chemistry
Key length is 123pm, and (data take from " chemistry-structure of matter and character (taking as an elective course) ") both chemical bond lengths are the most close, official
Energy unity structure is quite similar, and according to the similar principle that mixes, interaction force between the two is maximum.Therefore ethyl acetate can be effective
Dissolve nitrile rubber.
Acetone has preferable dissolubility to fluorubber, and fluorubber is high temperature bridging plug and the raw material of packer rubber bucket, fluorine rubber
Glue has the chemical stability of height, is the one that in current all elastomers, medium-resistance is best.The 26 resistance to stones of type fluorubber
Oil base oils, di esters oil, silicon ethers oil, silicic acid class oil, inorganic acid resistance, the organic and inorganic solvent of resistance to majority, medicine etc., only
It is weak to low molecular ketone, ether, ester, not amine-resistant, ammonia, Fluohydric acid., chlorosulfonic acid, phosphoric acid class hydraulic oil.Positive acetone is as low molecule ketone
Kind solvent, its C=O chemical bond lengths is 123pm, and functional group's C-F chemical bond lengths of fluorubber is 133pm, and (data are taken from
" chemistry-structure of matter and character (taking as an elective course) ") both chemical bond lengths are the most close, in low molecule ketones solvent, acetone pair
The solvability of fluorubber is best.
Normal propyl alcohol all has preferable dissolubility to other kind rubber beyond the nitrile rubber of high acrylonitrile content；All kinds of
The chemical functional groups key length of rubber is typically distributed across between 120 190pm, and in normal propyl alcohol, functional group is C-O, its chemistry bond distance
Degree is 143pm, although can not have prominent dissolving advantage for certain rubber, but its general applicability is stronger.
Three kinds of mixed mixed solvents of organic solvent primary raw material nitrile rubber to bridging plug and packer rubber bucket
With fluorubber solvability targetedly, and other kinds of traditional rubber part is had the suitability that comparison is wide in range, be respectively arranged with
Machine solvent all meet to the dissolution phenomena between rubber similar mix between principle, and organic solvent molecule and rubber macromolecule mutual
Interaction force between active force and rubber macromolecule is close, along with solvent constantly dissolving and leaching from rubber surface to deep layer
Enter, finally make rubber softening dissolve.
Preparation method: at normal temperatures ethyl acetate, acetone, normal propyl alcohol mixing and stirring be can be prepared by.
Under conditions of the solvent that disappears is fully contacted with rubber parts, this solvent that disappears can effectively soften dissolving rubber in 24 hours
Part, and injury corrosion-free to metal.
Utilize described down-hole bridging plug/packer rubber part disappear solvent rubber parts is carried out soften dissolve field conduct method,
Specifically include following steps:
1) solvent load that disappears is generally 0.5m3, it is recycled to bridging plug or envelope by the ground pumping-in equipment solvent that will disappear through oil pipe
Top every device；
2) continuous handling tubing string in the range of oil pipe tensile strength, movable bridging plug or packer, allow solvent and the rubber parts of disappearing
It is fully contacted；
3) closing well reacts 24 hours, allows and melts agent and fully react with rubber parts, and rubber parts softens dissolving the most at last；
4) handling tubing string in the range of oil pipe tensile strength, makes bridging plug or the smooth unfreezing of packer, and trips out pit shaft.
Embodiment 1
At normal temperatures 150L ethyl acetate, 150L acetone, 200L normal propyl alcohol being configured to mixed solution, this solvent that disappears can be
Dissolving rubber part, and injury corrosion-free to metal is effectively softened in 24 hours.
It is soft that the solvent that bridging plug/packer rubber part that embodiment prepares disappeared is used for down-hole bridging plug or packer sealing glue bucket
Change the concrete operation step decomposed as follows:
1) the solvent land used face pumping-in equipment that disappears prepared is circulated pumping through oil pipe
2) calculate displacement fluid volume, after the solvent that disappears all pumps into oil pipe, start infusion displacement fluid, displacement fluid volume with
The solvent that disappears flow to bridging plug just or packer top is basis
3) disappear after solvent flow to bridging plug or packer top via bridging plug or the fishing head at packer top or circulating valve and stop
Pump
4) continuous handling tubing string in the range of oil pipe tensile strength, movable bridging plug or packer, allow solvent and the rubber parts of disappearing
It is fully contacted
5) closing well reacts 24 hours
6) carry oil pipe on, bridging plug or packer are tripped out pit shaft.
Embodiment 2
At normal temperatures 125L ethyl acetate, 150L acetone, 225L normal propyl alcohol being configured to mixed solution, this solvent that disappears can be
Dissolving rubber part, and injury corrosion-free to metal is effectively softened in 24 hours.
Embodiment 3
At normal temperatures 150L ethyl acetate, 175L acetone, 175L normal propyl alcohol being configured to mixed solution, this solvent that disappears can be
Dissolving rubber part, and injury corrosion-free to metal is effectively softened in 24 hours.
The processing method of embodiment 2,3, with embodiment 1, no longer describes.
In sum, present disclosure is not limited in the above embodiments, and the knowledgeable people in same area can
Can propose other embodiment within technological guidance's thought of the present invention easily, but this embodiment is included in this
Within the scope of bright.
Claims (2)
1. the unfreezing for the solid stuck glue part of down-hole bridging plug/packer disappears solvent, it is characterised in that by by volume percentages
Following component mix:
Ethyl acetate 25%-35%
Acetone 25%-35%
Normal propyl alcohol 35%-45%.
Unfreezing for the solid stuck glue part of down-hole bridging plug/packer the most according to claim 1 disappears solvent, it is characterised in that
Mixed by the following component of by volume percentages:
Ethyl acetate 30%
Acetone 30%
Normal propyl alcohol 40%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610740429.3A CN106244125B (en) | 2016-08-26 | 2016-08-26 | The unfreezing for consolidating stuck glue part for underground bridge plug/packer disappears solvent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610740429.3A CN106244125B (en) | 2016-08-26 | 2016-08-26 | The unfreezing for consolidating stuck glue part for underground bridge plug/packer disappears solvent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106244125A true CN106244125A (en) | 2016-12-21 |
| CN106244125B CN106244125B (en) | 2019-10-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610740429.3A Active CN106244125B (en) | 2016-08-26 | 2016-08-26 | The unfreezing for consolidating stuck glue part for underground bridge plug/packer disappears solvent |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111021977A (en) * | 2019-11-22 | 2020-04-17 | 中国石油天然气股份有限公司 | Method for quickly removing soluble bridge plug in case of blocking |
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|---|---|---|---|---|
| WO2004016903A1 (en) * | 2002-08-19 | 2004-02-26 | Baker Hughes Incorporated | High expansion sealing device with leak path closures |
| CN101435318A (en) * | 2008-12-17 | 2009-05-20 | 中国石油化工股份有限公司胜利油田分公司采油工艺研究院 | Non-drill cementing well method and pipe column |
| CN102287161A (en) * | 2011-07-25 | 2011-12-21 | 上海道氟化工科技有限公司 | Compression packer rubber cylinder, and preparation method and application thereof |
| CN104632196A (en) * | 2014-12-12 | 2015-05-20 | 中国石油天然气股份有限公司 | Horizontal well section testing method by adopting soluble rubber sleeve packer |
| CN204782918U (en) * | 2015-07-07 | 2015-11-18 | 吉林市旭峰激光科技有限责任公司 | Dissolubility bridging plug based on rubber sleeve |
-
2016
- 2016-08-26 CN CN201610740429.3A patent/CN106244125B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004016903A1 (en) * | 2002-08-19 | 2004-02-26 | Baker Hughes Incorporated | High expansion sealing device with leak path closures |
| CN101435318A (en) * | 2008-12-17 | 2009-05-20 | 中国石油化工股份有限公司胜利油田分公司采油工艺研究院 | Non-drill cementing well method and pipe column |
| CN102287161A (en) * | 2011-07-25 | 2011-12-21 | 上海道氟化工科技有限公司 | Compression packer rubber cylinder, and preparation method and application thereof |
| CN104632196A (en) * | 2014-12-12 | 2015-05-20 | 中国石油天然气股份有限公司 | Horizontal well section testing method by adopting soluble rubber sleeve packer |
| CN204782918U (en) * | 2015-07-07 | 2015-11-18 | 吉林市旭峰激光科技有限责任公司 | Dissolubility bridging plug based on rubber sleeve |
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| 岳德茂: "《印刷科技实用手册-第三分册 印刷器材篇》", 30 April 2010, 印刷工业出版社 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111021977A (en) * | 2019-11-22 | 2020-04-17 | 中国石油天然气股份有限公司 | Method for quickly removing soluble bridge plug in case of blocking |
| CN111021977B (en) * | 2019-11-22 | 2022-05-10 | 中国石油天然气股份有限公司 | Method for quickly removing soluble bridge plug in case of blocking |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106244125B (en) | 2019-10-22 |
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Effective date of registration: 20211028 Address after: 100007 No. 9 North Main Street, Dongcheng District, Beijing, Dongzhimen Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Bohai Drilling Engineering Co.,Ltd. Address before: 300457 Tianjin Binhai New Area Development Zone Huanghai Road 106, Bohai Drilling Engineering Co., Ltd. science and Technology Development Office Patentee before: CNPC Bohai Drilling Engineering Co.,Ltd. |
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