CN2536600Y - Corrosionproof protection of watery oil well casings by anodic column strings in adjacent wells - Google Patents
Corrosionproof protection of watery oil well casings by anodic column strings in adjacent wells Download PDFInfo
- Publication number
- CN2536600Y CN2536600Y CN 02234377 CN02234377U CN2536600Y CN 2536600 Y CN2536600 Y CN 2536600Y CN 02234377 CN02234377 CN 02234377 CN 02234377 U CN02234377 U CN 02234377U CN 2536600 Y CN2536600 Y CN 2536600Y
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- well
- column
- string
- anodic
- oil
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Abstract
The utility model relates to an anode string of adjacent well used for antisepticising and protecting sleeves of oil well or well fixed in the oil well, providing an electrochemical protecting column-shaped anode string. The utility model is characterized in that a sleeve (2) fixed in the oil well is connected with the column-shaped anode string (7) by wires (4) and the lower part of the anode string (7) enters an adjacent well (5) with the sleeve (2); the depth of the adjacent well (5) is about 50 meters, and the six to nine column-shaped anodes of the anode string (7) are arranged in intervals; the upper part of the sleeve (2) is connected with an insulating flange (1) buried under the ground (9), and a packing bag (9) is formed outside each column-shaped anode string (7). The utility model has an advantage that the oil sleeves fixed in the oil well can be initiatively protected without external current removal of the damaged oil sleeve in erosion resistant layer, maintenance and management.
Description
(1) technical field:
The utility model relate to the oil field well sealing in the offset well anodic column string of the Casing Failure corrosionproof protection of down-hole.
(2) background technology:
At present oil well sealing make the anticorrosion with coat protective layer in advance in the sleeve pipe of down-hole, and sleeve pipe is in underground work time limit general requirement more than 30 years.And protective system one is can aging, be full of cracks after long use of time, the 2nd, often to intermittently inject the high temperature washing fluid in the downhole production operation to down-hole casing, and make the cold prominent heat of cover rostrum, cause that coating is easier breaks.Another kind method is to the jacket application impressed current, but this method one is to need impressed current, the 2nd, need equipment such as potentiostat, and need regularly add liquid, manual maintenance is more.The oil field petroleum casing pipe is in two kinds of situations, a class be newly drilled well or overhaul get the cover well make the preservative coat sleeve pipe; Another kind of is the sleeve pipe under the lower going-into-well, and this kind at the sleeve pipe of the oil and water well of ordinary production corrosionproof protection how, will be the patent problem to be solved of this application just.
(3) utility model content:
Technical problem to be solved in the utility model is at the problem that exists in the background technology, and provide a kind of to sealing in the offset well anodic column string of the Casing Failure corrosionproof protection of down-hole.
The invention for solving the technical problem can reach by following technical solution: connect the column anodic column string in the Casing Failure in the down-hole of sealing with lead, anodic column string is lowered to and has in the offset well of this cased well down.
In such scheme, about 50 meters of the degree of depth of offset well, the column anode of anodic column string can be at interval 6～9; Also connect the isolated flange that is embedded in the soil on the sleeve pipe; Each column anode string forms the filler bag outward.The phenomenon that chemistry or electrochemical reaction are damaged because of taking place in the surface that so-called corrosion is a material.As getting rusty of iron is the common form of metallic corrosion.Electrochemical anti-corrosive such as anonizing are wherein arranged; And employing anodic protection is made anode with protected metal, carries out anodic polarization under certain condition, makes the metallic surface transfer " passive state " to by active condition, to prevent metallic corrosion.The outer corrosion of petroleum casing pipe many underground 100 meters with interior shallow top layer section; the column anode of certainweight is connected; form 50 meters of anodic column string length overalls by certain requirement series connection; bore 50 meters deep-wells of a glance at other 10 meters of oil and water well; anode by linking to each other with oil and water well face of land sleeve pipe in the requirement lower going-into-well necessarily and with lead; circuit loop can reach below 100 meters, carries out corrosionproof protection to 100 meters with interior petroleum casing pipe thereby can reach.
The utility model is compared with the above-mentioned background technology can have following beneficial effect: do not need impressed current, do not need to trip out the petroleum casing pipe of preservative coat breakage, the deep well anode string can be spontaneously protected and without maintenance management in the petroleum casing pipe of down-hole sealing.
(4) description of drawings:
Accompanying drawing is the utility model installation plan.
(5) embodiment:
Below in conjunction with the drawings and specific embodiments will the utility model is described in further detail:
Shown in accompanying drawing, connect column anodic column string 7 at the Casing Failure 2 usefulness leads 4 of sealing in the down-hole, anodic column string 7 is lowered to and 5 li of the offset wells that sleeve pipe 2 wells are arranged down.
In such scheme, about 50 meters of the degree of depth of offset well 5, the column anode of anodic column string 7 can be at interval 6～9; Also connect the isolated flange 1 that is embedded in the soil 9 on the sleeve pipe 2; Each column anode string 7 outer filler bag 6 that form.The outer corrosion of petroleum casing pipe many underground 100 meters with interior shallow top layer section; the column anode of certainweight is connected; form 50 meters of anodic column string length overalls by certain requirement series connection; bore 50 meters deep-wells of a glance at other 10 meters of oil and water well; anode by necessarily also linking to each other with oil and water well face of land sleeve pipe with lead in the requirement lower going-into-well, is carried out corrosionproof protection to 100 meters with interior petroleum casing pipe thereby reach.The socket 3 that but mounting strap closes on the lead 4, each conduction column anode made from anode material can be spacing with clamp 8; The well head of the well 5 that is bored is encapsulated in following about 0.5 meter of the face of land with soil 9.
Claims (4)
1, a kind of relate to the oil field well sealing in the offset well anodic column string of the Casing Failure corrosionproof protection of down-hole; oil field well sealing contains sleeve pipe (2) in the down-hole; it is characterized in that: sleeve pipe (2) connects column anodic column string (7) with lead (4), and anodic column string (7) is lowered to and offset well (5) lining that sleeve pipe (2) well is arranged down.
2, offset well anodic column string according to claim 1 is characterized in that: about 50 meters of the degree of depth of offset well (5), the column anode of anodic column string (7) can be at interval 6～9.
3, offset well anodic column string according to claim 1 is characterized in that: sleeve pipe (2) is gone up and is connected the isolated flange (1) that is embedded in the soil (9).
4, offset well anodic column string according to claim 1 and 2 is characterized in that: the outer filler bag (6) that forms of each column anode string (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02234377 CN2536600Y (en) | 2002-05-08 | 2002-05-08 | Corrosionproof protection of watery oil well casings by anodic column strings in adjacent wells |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02234377 CN2536600Y (en) | 2002-05-08 | 2002-05-08 | Corrosionproof protection of watery oil well casings by anodic column strings in adjacent wells |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2536600Y true CN2536600Y (en) | 2003-02-19 |
Family
ID=33709203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02234377 Expired - Lifetime CN2536600Y (en) | 2002-05-08 | 2002-05-08 | Corrosionproof protection of watery oil well casings by anodic column strings in adjacent wells |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2536600Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107313721A (en) * | 2017-05-04 | 2017-11-03 | 中石油煤层气有限责任公司 | Pumpingh well impressed current method anti-corrosive apparatus |
| CN110508609A (en) * | 2019-08-12 | 2019-11-29 | 浙江省有色金属地质勘查局 | A kind of heavy metal-polluted soil improvement anode construction and heavy metal-polluted soil processing unit |
-
2002
- 2002-05-08 CN CN 02234377 patent/CN2536600Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107313721A (en) * | 2017-05-04 | 2017-11-03 | 中石油煤层气有限责任公司 | Pumpingh well impressed current method anti-corrosive apparatus |
| CN107313721B (en) * | 2017-05-04 | 2024-02-20 | 中石油煤层气有限责任公司 | External current method anticorrosion device for pumping well |
| CN110508609A (en) * | 2019-08-12 | 2019-11-29 | 浙江省有色金属地质勘查局 | A kind of heavy metal-polluted soil improvement anode construction and heavy metal-polluted soil processing unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20120508 Granted publication date: 20030219 |