CN101397670A - Sacrificial anode and protective cathode-pumping rod anti-corrosive apparatus - Google Patents
Sacrificial anode and protective cathode-pumping rod anti-corrosive apparatus Download PDFInfo
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- CN101397670A CN101397670A CNA2007101623847A CN200710162384A CN101397670A CN 101397670 A CN101397670 A CN 101397670A CN A2007101623847 A CNA2007101623847 A CN A2007101623847A CN 200710162384 A CN200710162384 A CN 200710162384A CN 101397670 A CN101397670 A CN 101397670A
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- pumping rod
- sucker rod
- anode
- rod
- sacrificial anode
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Abstract
The invention relates to a pumping rod which can prevent metal corrosion. The pumping rod utilizes the principle of protecting a cathode by sacrificing an anode in electrochemistry and takes zinc, lead, magnesium and other active metals as the sacrificial anode which is designed into the anode of the pumping rod. During production, the nipple of the pumping rod is processed according to the technical specification of the pumping rod firstly and the length of the nipple is 400mm to 500mm; then the nipple is put into a specially designed rod cavity; magnesium or aluminium or zinc metal blocks are converted into liquid by heating and melting and then cast into the nipple cavity of the pumping rod; and shaping, thermal insulation, slow cooling, mold unloading and mechanical processing are carried out, a coarse blank is processed into a smooth revolution body, thread at the two ends of the pumping rod is processed, and collars are screwed, therefore, the anode assembly of the pumping rod is formed. When being installed and put into a well, a group of pumping rod anodes are assembled according to the length of every 60m to 80m and the installation method is as follows: during the process of putting down the pumping rod, the anode of the pumping rod is connected in series on a rod string and the up and down collars and thread are screwed.
Description
Affiliated technical field
The present invention relates to a kind of oil field aseptic technic, especially can slow down the corrosion technology of sucker rod.
Background technology
Present known oil field pumping rod anti-corrosive technology mainly is to adopt the method for top coat protection; for example: sucker rod adopts the external coating rust-inhibiting paint; or carry out method such as bezel ring, epoxy resins coating; sucker-rod coupling adopts the surface spraying, or takes the method for surface blackening, or material is adopted the method for polynary infiltration; these methods have played the certain protection effect to sucker rod anticorrosion undoubtedly; but poor effect, the protection period is short, the cost height.At industrial enterprise's petrochemical enterprise particularly, corrosion is a common problem that influences enterprise's ordinary production, corrosion be most metals all the time all in a kind of spontaneous unhelpful consumption of carrying out that takes place, loss that this consumption causes and consequence are very serious, not only waste a large amount of raw material metal resources, also make to produce and pause, the material passage, equipment cost increases, quality product reduces, shorten work-ing life, contaminate environment, even cause various accident.
Summary of the invention
In order to overcome the etching problem of down-hole, oil field sucker rod, the invention provides a kind of aseptic technic of sacrificial anode and protective cathode---a kind of anti-corrosion pumping bar, the corrosion that can effectively slow down down-hole, oil field sucker rod, and make simply, easy and simple to handle, long service life.
The technical solution adopted for the present invention to solve the technical problems is: utilize electrochemistry sacrificial anode and protective cathode principle; use zinc; aluminium; the metal of active element such as magnesium is as sacrificial anode; be designed to the sucker rod anode; its manufacture method is: process sucker rod substitute by the sucker rod technical specifications earlier; pipe nipple length is at 400-500mm; again sucker rod substitute is put into special bar die cavity; magnesium or aluminium or zinc metal block heat fused are become liquid; water then in the sucker rod substitute die cavity; be incubated through moulding; the cooling back demoulding; carry out mechanical workout again; coarse blank cylindrical is processed into slick revolution, again sucker rod substitute two ends screw thread is processed, just become the sucker rod anode then with after sucker-rod coupling is connected.According to the difference configuration of oil well oil-pumping roofbolt, but intended diameter is
With
Sucker rod anode etc. plurality of specifications; calculated anodic volume size according to anode consumption speed; promptly determine the length of revolution; generally designed by 3 years anode consumption life-spans; according to Theoretical Calculation and practice test; the spontaneous current of every sucker rod anode formation can be protected 50 meters long sucker rod strings; therefore; when being installed, the sucker rod anode adorns one by every 60-80 meter ampere; installation method is in the process of lower sucker rod; the sucker rod anodic column string that processes is associated on the sucker rod roofbolt, and the box cupling screw thread can be finished the installation of sucker rod anodic about tightening.This sucker rod anode and sucker rod string are lowered in the oil well simultaneously, and along with the formation of electropotential, electronic current just constantly flows, and anode material just slowly consumes, thereby reaches sacrificial anode and protective cathode---the purpose of pumping rod anti-corrosive.
The invention has the beneficial effects as follows: utilize the principle of sacrificial anode and protective cathode to make the sucker rod anode; not only sucker rod, box cupling there is preservative effect; and it is simple in structure; the anticorrosion cycle can be for 3 years; save the consumption of metallic substance greatly; eliminate all kinds of accidents that sucker rod or box cupling form because of corrosion failure, the manufacturing cost of strong pressure drop facility.Simultaneously, can artificially grasp the replacement cycle, become passive dealing with and be ACTIVE CONTROL, effectively grasp the initiative of field produces.
Description of drawings
The present invention is further illustrated below in conjunction with drawings and Examples.
Fig. 1 is a structure principle chart of the present invention.
Fig. 2 is a scheme of installation of the present invention.
Among the figure: 1, box cupling, 2, the sucker rod anode, 3, sucker rod substitute, 4, sucker rod, 5, oil pipe, 6 sleeve pipes.
Embodiment:
In Fig. 1, sucker rod substitute 3 relies on top box cupling 1 and is threaded, and anode 2 casts on the sucker rod substitute 3, and the sucker rod substitute lower end is threaded with bottom box cupling 1.
In embodiment illustrated in fig. 2, sucker rod 4 is threaded with box cupling 1, and anode 2 casts in sucker rod substitute 3, and the sucker rod substitute lower end is threaded with bottom box cupling 1, and box cupling lower end, bottom is threaded with sucker rod.According to calculating and experience; the spontaneous potential that the sucker rod anode forms can be protected 50 meters sucker rod roofbolt up and down; therefore; when being installed, the sucker rod anode adorns one group by every 60-80 meter ampere; calculate needs according to well depth and install several groups; in the lower sucker rod process, the sucker rod anodic column string is associated on the sucker rod roofbolt then, tightens with the screw thread of box cupling and can finish the installation of sucker rod anodic.Maintenance free after the sucker rod anode is gone into the well; owing to there are a large amount of unbound electrons to exist in the anode; when having potential difference in the metal; electronics can directionally flow; anode by well liquid ionogen to protected body---sucker rod provides a cathodic current; make protected body carry out cathodic polarization; along with constantly flowing of electric current; the unbound electron of anode material is constantly overflowed; the transfer transport of these magnesium or aluminium or zinc metal is to protected sucker rod; thereby the realization galvanic protection, anode then is consumed gradually.By the microscopic motion of above-mentioned electronics, thereby the negative electrode of sucker rod is implemented protection, reached the corrosion that slows down sucker rod, prolonged the work-ing life of sucker rod.
Claims (2)
1, a kind of sacrificial anode and protective cathode---pumping rod anti-corrosive apparatus; it is by box cupling, sacrificial anode, sucker rod substitute are formed by connecting according to the order of sequence up and down; it is characterized in that: at cylindrical casting magnesium or the aluminium or the zinc metal anode of sucker rod substitute; and be processed into slick rotator; the upper end of sucker rod substitute is threaded with the top box cupling, and its lower end is threaded with the bottom box cupling.
2, according to the described a kind of sacrificial anode and protective cathode of claim 1---pumping rod anti-corrosive apparatus; it is characterized in that: sacrificial anode is to be connected on the sucker rod string of oil well; during installation; sucker rod anodic lower end is threaded with the bottom sucker rod; its upper end is threaded with the top sucker rod; with its screw thread tighten can lower going-into-well in, every through the 60-80 rice one group of sacrificial anode of connecting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101623847A CN101397670A (en) | 2007-09-30 | 2007-09-30 | Sacrificial anode and protective cathode-pumping rod anti-corrosive apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101623847A CN101397670A (en) | 2007-09-30 | 2007-09-30 | Sacrificial anode and protective cathode-pumping rod anti-corrosive apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101397670A true CN101397670A (en) | 2009-04-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101623847A Pending CN101397670A (en) | 2007-09-30 | 2007-09-30 | Sacrificial anode and protective cathode-pumping rod anti-corrosive apparatus |
Country Status (1)
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| CN (1) | CN101397670A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102912354A (en) * | 2011-10-24 | 2013-02-06 | 中国科学院金属研究所 | Cathode protection system for underground pipeline system |
| CN103014723A (en) * | 2013-01-10 | 2013-04-03 | 中国石油大学(华东) | Corrosion controller of oil well production equipment and sucker rod employing controller |
| CN107575168A (en) * | 2017-08-24 | 2018-01-12 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | A kind of anticorrosive casing pipe and arrangement and application |
| CN111032995A (en) * | 2017-08-18 | 2020-04-17 | 通用电气(Ge)贝克休斯有限责任公司 | Corrosion protection element for downhole connections |
-
2007
- 2007-09-30 CN CNA2007101623847A patent/CN101397670A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102912354A (en) * | 2011-10-24 | 2013-02-06 | 中国科学院金属研究所 | Cathode protection system for underground pipeline system |
| CN102995026A (en) * | 2011-10-24 | 2013-03-27 | 中国科学院金属研究所 | Construction method for cathode protection device for underground pipeline system |
| CN102912354B (en) * | 2011-10-24 | 2014-10-22 | 中国科学院金属研究所 | Cathode protection system for underground pipeline system |
| CN102995026B (en) * | 2011-10-24 | 2014-12-10 | 中国科学院金属研究所 | Construction method for cathode protection device for underground pipeline system |
| CN103014723A (en) * | 2013-01-10 | 2013-04-03 | 中国石油大学(华东) | Corrosion controller of oil well production equipment and sucker rod employing controller |
| CN103014723B (en) * | 2013-01-10 | 2015-04-22 | 中国石油大学(华东) | Corrosion controller of oil well production equipment and sucker rod employing controller |
| CN111032995A (en) * | 2017-08-18 | 2020-04-17 | 通用电气(Ge)贝克休斯有限责任公司 | Corrosion protection element for downhole connections |
| CN107575168A (en) * | 2017-08-24 | 2018-01-12 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | A kind of anticorrosive casing pipe and arrangement and application |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090401 |