CN1297626C - Anticorrosion preservative agent special for sleeve for oilfield well drilling and well cementing - Google Patents
Anticorrosion preservative agent special for sleeve for oilfield well drilling and well cementing Download PDFInfo
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- CN1297626C CN1297626C CNB2003101217474A CN200310121747A CN1297626C CN 1297626 C CN1297626 C CN 1297626C CN B2003101217474 A CNB2003101217474 A CN B2003101217474A CN 200310121747 A CN200310121747 A CN 200310121747A CN 1297626 C CN1297626 C CN 1297626C
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Abstract
The present invention relates to a special anticorrosion protective agent for sleeves used for oilfield well drilling and well cementing, which is prepared from 0.25% to 1.50% of corrosion inhibitors, 0.15% to 1.20% of bactericide, 0.50% to 3.00% of stabilizer trivalent aluminum salt, 2.00% to 5.00% of weighting agents, 0.50% to 5.50% of tackifiers, 3.0% to 11.0% of soil and balance of water. The special anticorrosion protective agent mainly solves the problems of corrosion and protection of sleeves in underground open hole sections of completed oilfield wells, and is capable of preventing the collapse of the open hole sections. The special anticorrosion protective agent is used for protecting the sleeves from the corrosion of well completion mud, formation water and the like, extending the service life of the oil wells and lowering the oilfield development cost; the corrosion inhibiting rate can reach over 90%, the service life of the oil wells in the same region can be extended for 4 to 10 years, and the special anticorrosion protective agent has an obvious corrosion protection function.
Description
Technical field
The present invention relates to a kind of anti-corrosive protecting agent of oil drilling well cementation specialized barrel; it can be to oil, G﹠W in the stratum; and completion mud carries out corrosionproof protection to telescopic corrosion, and it can prevent the pollution that mud causes the stratum as the substitute of mud simultaneously, prevents that the stratum from collapsing.
Background technology
When carrying out drilling operation, need in sleeve pipe, inject a large amount of mud, contain a large amount of acid, alkali and some in the mud to the material that sleeve pipe has corrosive nature, it not only has corrosive nature to sleeve pipe, and can pollute with the stratum the stratum and collapse.Oil, G﹠W in the stratum also has corrosive nature to sleeve pipe simultaneously, makes telescopic shortening in work-ing life, at present, yet there are no the better method that addresses this problem.
Summary of the invention
The objective of the invention is in the stratum; the heterogeneity of oil, G﹠W; and completion mud is analyzed the telescopic mechanism of corrosion; consider the protection formation contaminant simultaneously; prevent the stratum from collapsing and design a kind of substitute of mud; it has provide protection to casing corrosion, protects the borehole wall to prevent the pollution of the environment simultaneously, and its use can improve the quality of well cementation greatly.
The concrete scheme of this product is: its primary structure composition contains inhibiter, sterilant, stablizer, weighting agent and tackifier.Inhibiter is an amine inhibitor, primary amine or alkylamine or acid amides; Sterilant is diquaternary amine salt or dichlorophen or dioxide peroxide; Stablizer is a trivalent aluminium salt; Weighting agent is a powdered iron ore; Tackifier are polyacrylamide or Walocel MT 20.000PV (CMC).Each moiety scope by weight percentage is inhibiter 0.25%--1.50%, sterilant 0.15%--1.20%, stablizer trivalent aluminium salt 0.50%--3.00%, weighting agent 2.00%--5.00%, tackifier 0.50%--5.50%, slope soil 3.0%--11.0%, all the other are water; Function is the prevention casing corrosion, and the stable exposed borehole wall improves cementing quality; Principle is the amine inhibitor that is added with some amount in the protective material, can form layer protecting film at casing wall, has completely cut off like this because effects such as oxygen corrosion, bacterial corrosions.Contain sterilant, can avoid owing to the long-term bacterial reproduction that causes of placing, as sulfatereducting bacteria.Adding in the protective material has trivalent aluminium salt to prevent sleeve pipe caving in of exposed stratum outward as potent inhibitor.Good suspending power is arranged, and density, viscosity can be adjusted as required, require its Auto-regulating System of Density of Heavy Medium scope between 1.10-2.15 according to different well depths.
Oil drilling of the present invention well cementation specialized barrel anti-corrosive protecting agent mainly solves down-hole open hole section casing corrosion and protection question behind the oilfield well completion, prevents the open hole sloughing problem simultaneously.Its objective is that protective casing is not subjected to the corrosion of completion mud and local water etc., prolong oil well work-ing life, reduce the oil-field development cost.Using method is very convenient, can inject into well by spearhead is disposable when the completion well cementing operation, can carry out cementing operation.It has provide protection to casing corrosion, protects the borehole wall to prevent the pollution of the environment simultaneously, and its use can improve cementing quality greatly.Confirm that by experiment its effect is obvious, corrosion inhibition rate reaches more than 90%, can make with more than the regional oil well life-span prolongation 4-10, and tangible corrosionproof protection effect is arranged.
The implementation result corrosion inhibition rate all reaches more than 90%.
Embodiment
Embodiment 1:
Press routine composition and weight percent proportional arrangement, amine inhibitor primary amine 0.25%, sterilant diquaternary amine salt 0.15%, stablizer trivalent aluminium salt 0.50%, weighting agent powdered iron ore 2.00%, tackifier polyacrylamide 0.50%, slope soil 3.0%, all the other are water.Its protective material density is 1.10, is incubated 38 ℃, corrosion inhibition rate 91%.
Embodiment 2:
Press routine composition and weight percent proportional arrangement, amine inhibitor acid amides 1.50%, sterilant dioxide peroxide 1.20%, stablizer trivalent aluminium salt 3.00%, weighting agent powdered iron ore 5.00%, tackifier Walocel MT 20.000PV 5.50%, slope soil 11.0%, all the other are water.Its protective material density is 2.15, is incubated 38 ℃, corrosion inhibition rate 94%.
Embodiment 3:
Press routine composition and weight percent proportional arrangement, amine inhibitor alkylamine 0.88%, sterilant diquaternary amine salt 0.68%, stablizer trivalent aluminium salt 1.75%, weighting agent powdered iron ore 3.50%, tackifier polyacrylamide 3.00%, slope soil 8.5%, all the other are water.Its protective material density is 1.75, is incubated 38 ℃, corrosion inhibition rate 98%.
Embodiment 4:
Press routine composition and weight percent proportional arrangement, amine inhibitor alkylamine 0.40%, sterilant alkylamine 0.25%, stablizer trivalent aluminium salt 0.90%, weighting agent powdered iron ore 2.50%, tackifier polyacrylamide 1.00%, slope soil 4.50%, all the other are water.Its protective material density is 1.35, is incubated 38 ℃, corrosion inhibition rate 93%.
Embodiment 5:
Press routine composition and weight percent proportional arrangement, amine inhibitor acid amides 0.60%, sterilant dioxide peroxide 0.45%, stablizer trivalent aluminium salt 1.35%, weighting agent powdered iron ore 3.00%, tackifier polyacrylamide 2.00%, slope soil 5.5%, all the other are water.Its protective material density is 1.50, is incubated 38 ℃, corrosion inhibition rate 96%.
Embodiment 6:
Press routine composition and weight percent proportional arrangement, amine inhibitor primary amine 1.00%, sterilant 0.85%, stablizer trivalent aluminium salt 2.00%, weighting agent powdered iron ore 4.00%, tackifier Walocel MT 20.000PV 4.00%, slope soil 9.1%, all the other are water.Its protective material density is 1.80, is incubated 38 ℃, corrosion inhibition rate 94%.
Embodiment 7:
Press routine composition and weight percent proportional arrangement, amine inhibitor alkylamine 1.20%, sterilant 1.00%, stablizer trivalent aluminium salt 2.50%, weighting agent powdered iron ore 4.50%, tackifier Walocel MT 20.000PV 5.00%, slope soil 9.5%, all the other are water.Its protective material density is 1.92, is incubated 38 ℃, corrosion inhibition rate 97%.
Embodiment 8:
Press routine composition and weight percent proportional arrangement, amine inhibitor alkylamine 0.88%, sterilant dichlorophen 0.68%, stablizer trivalent aluminium salt 1.75%, weighting agent powdered iron ore 3.50%, tackifier polyacrylamide 1.50%, slope soil 8.8%, all the other are water.Its protective material density is 1.80, is incubated 38 ℃, corrosion inhibition rate 96%.
The corrosion inhibition rate data obtain by following method and formula:
In the soak case, laboratory experiment adopts the lacing film method, gets interior poly-sulphur mud of well and configuration protection liquor ratio.Put into preceding weight-taking-up back weight=etching extent, the preceding weight=corrosion rate of etching extent/put into.
Calculation formula is as follows:
Average corrosion rate Fa=[(G1-G2) 3650]/(St ρ)
Unit: mm/a, in the a--formula:
Wherein: G1--test piece initial mass, g G2--test back test piece quality, g S--test piece surface-area, cm2 t--test period, d, d--days ρ--test piece density, g/cm3 gets 7.8.
Claims (2)
1 one kinds of oil drillings well cementation specialized barrel anti-corrosive protecting agents is characterized in that: by weight percentage it be by:
Alkylamine 0.25%--1.50%,
Diquaternary amine salt 0.15%--1.20%,
Trivalent aluminium salt 0.50%--3.00%,
Powdered iron ore 2.00%--5.00%,
Polyacrylamide 0.50%--5.50%,
Slope soil 3.0%--11.0%,
All the other mix for water.
2. oil drilling well cementation specialized barrel anti-corrosive protecting agent according to claim 1 is characterized in that:
The Auto-regulating System of Density of Heavy Medium scope is between 1.10-2.15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101217474A CN1297626C (en) | 2003-12-22 | 2003-12-22 | Anticorrosion preservative agent special for sleeve for oilfield well drilling and well cementing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101217474A CN1297626C (en) | 2003-12-22 | 2003-12-22 | Anticorrosion preservative agent special for sleeve for oilfield well drilling and well cementing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1632041A CN1632041A (en) | 2005-06-29 |
| CN1297626C true CN1297626C (en) | 2007-01-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101217474A Expired - Fee Related CN1297626C (en) | 2003-12-22 | 2003-12-22 | Anticorrosion preservative agent special for sleeve for oilfield well drilling and well cementing |
Country Status (1)
| Country | Link |
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| CN (1) | CN1297626C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102977871A (en) * | 2012-11-27 | 2013-03-20 | 唐山市金沙工贸有限公司 | Annulus protection fluid |
| CN106285566A (en) * | 2016-08-01 | 2017-01-04 | 中嵘能源科技集团有限公司 | A kind of air injection anticorrosion completion method and the inhibition acid solution wherein used |
| CN111154470A (en) * | 2020-02-21 | 2020-05-15 | 四川振邦石油科技有限公司 | Slow-release solid corrosion inhibitor, preparation method and application |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0185612A1 (en) * | 1984-12-10 | 1986-06-25 | Sanitized Verwertungs A.-G. | Disinfection of crude oil and petroleum products and its application to the production of crude oil |
| US5424284A (en) * | 1991-10-28 | 1995-06-13 | M-I Drilling Fluids Company | Drilling fluid additive and method for inhibiting hydration |
| EP0838514A1 (en) * | 1993-07-02 | 1998-04-29 | M-I Drilling Fluids L.L.C. | Drilling fluid additive and method for inhibiting hydration |
| CN1415688A (en) * | 2002-10-31 | 2003-05-07 | 大庆油田有限责任公司 | Chemical blocking remover for water injection well in oil field |
| RU2208132C1 (en) * | 2002-05-28 | 2003-07-10 | ООО "Баштрансгаз" | Neutral densifying fluid for wells |
| CN1435464A (en) * | 2002-11-08 | 2003-08-13 | 郝占元 | Borehole synthetic chlorine dioxide blocking remover and broken down method therewith for oil field |
-
2003
- 2003-12-22 CN CNB2003101217474A patent/CN1297626C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0185612A1 (en) * | 1984-12-10 | 1986-06-25 | Sanitized Verwertungs A.-G. | Disinfection of crude oil and petroleum products and its application to the production of crude oil |
| US5424284A (en) * | 1991-10-28 | 1995-06-13 | M-I Drilling Fluids Company | Drilling fluid additive and method for inhibiting hydration |
| EP0838514A1 (en) * | 1993-07-02 | 1998-04-29 | M-I Drilling Fluids L.L.C. | Drilling fluid additive and method for inhibiting hydration |
| RU2208132C1 (en) * | 2002-05-28 | 2003-07-10 | ООО "Баштрансгаз" | Neutral densifying fluid for wells |
| CN1415688A (en) * | 2002-10-31 | 2003-05-07 | 大庆油田有限责任公司 | Chemical blocking remover for water injection well in oil field |
| CN1435464A (en) * | 2002-11-08 | 2003-08-13 | 郝占元 | Borehole synthetic chlorine dioxide blocking remover and broken down method therewith for oil field |
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| Publication number | Publication date |
|---|---|
| CN1632041A (en) | 2005-06-29 |
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