CN203443884U - Down-hole tube column galvanic corrosion detection device - Google Patents
Down-hole tube column galvanic corrosion detection device Download PDFInfo
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- CN203443884U CN203443884U CN201320271934.XU CN201320271934U CN203443884U CN 203443884 U CN203443884 U CN 203443884U CN 201320271934 U CN201320271934 U CN 201320271934U CN 203443884 U CN203443884 U CN 203443884U
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- bimetallic corrosion
- detecting element
- hole string
- pick
- liner
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Abstract
The utility model discloses a down-hole tube column galvanic corrosion detection device which comprises a galvanic corrosion detection element, lining caps, protective caps and a lining bracket, wherein the galvanic corrosion detection element consists of metal test blocks that are formed into galvanic couples; the metal test blocks are made of at least two metals; the metal test blocks are arranged in an adjustable space mode; two lining caps are provided; the two lining caps are respectively connected with the metal test blocks from two ends so as to fix the metal test blocks in a clamping manner; two protective caps are provided; the two lining caps are respectively fixed inside the two protective caps; the galvanic corrosion detection element, the lining cap and the protective caps are connected into an integral structure and are fixed on the lining bracket. The down-hole tube column galvanic corrosion detection device can be connected with a down-hole tube column to perform down-hole experiment directly, the experimental working condition is accordant with the actual working condition, the accuracy and the reliability of the experimental data are ensured, and moreover the exposure area ratio of the two metal test blocks can be randomly adjusted so as to ensure the accuracy.
Description
Technical field
The utility model relates to oil field petrochemical complex checkout equipment technical field, particularly relates to a kind of down-hole string bimetallic corrosion pick-up unit.
Background technology
In the process of exploration of oil and gas field, exploitation, because environmental baseline is complicated, harsh, down-hole string often needs the metal of two kinds of unlike materials to link together, to meet job requirement.But this is just easy to make down-hole string to form bimetallic corrosion.And galvanic effect is understood accelerated corrosion electronegative potential material and is caused even fracture of tubing and casing perforation.This is because in bimetallic corrosion phenomenon, and ratio of cathodic to anodic area increases, and can make anodic attack increase the weight of.If anode metal area is little, corrosion can only longitudinally be goed deep into, and even may produce serious pitting.Therefore, test different area has very important practical significance than the situation of two kinds of different metal material generation bimetallic corrosions under condition.,?N
In prior art, there are the various pick-up units for bimetallic corrosion, but these pick-up units are mostly function singlenesses, detection mode is too simple, not only can not be applied to down-hole string scene tests, can not adjust the area of metal testing plate, be difficult to well for field condition provides perfect solution
Chinese utility model patent (application number: 200910238567.1) disclose a kind of " bimetallic corrosion proving installation ", the technical scheme of this utility model consists of shell, liner, sealing screw, reducing annulus, O-ring seal and trip bolt for its structure.Although it is simple to operate that this utility model has, good airproof performance, test findings is stable, the feature that reappearance is strong, but be to be mainly applicable to detect Electrochemistry Information, and only can be applied to indoor, equally also not only can not be applied to down-hole string scene tests, can not adjust the area of metal testing plate, can not be well for field condition provides solution, with solving practical problems better.
Therefore, for existing problems of the prior art, needing badly provides a kind of and can under various field working conditions environment, detect, and can detect any two kinds of metal materials and arbitrary area than time there is the down-hole string bimetallic corrosion detection technique of bimetallic corrosion situation, to overcome defect of the prior art, seem particularly important.
Summary of the invention
The purpose of this utility model is to avoid weak point of the prior art and a kind of down-hole string that can be directly installed on is provided, adopt adjustable structure, can detect any two kinds of metal materials and arbitrary area than time there is the down-hole string bimetallic corrosion pick-up unit of bimetallic corrosion situation.
The purpose of this utility model is achieved through the following technical solutions:
A kind of down-hole string bimetallic corrosion pick-up unit is provided, wherein:
Include bimetallic corrosion detecting element, liner cap, helmet, liner support, described bimetallic corrosion detecting element is set at least by the metal testing plate of two kinds of metals and forms galvanic couple to the bimetallic corrosion detecting element forming, between described metal testing plate, in adjustable distance mode, arrange, described liner cap is two, two described liner caps are clamped and connected from two ends respectively and fix described metal testing plate, described helmet is two, two described liner caps are individually fixed in described two described helmets, described bimetallic corrosion detecting element, described liner cap, described helmet connects into one-piece construction, and be fixed on described liner support.
Thus, whole down-hole string bimetallic corrosion pick-up unit can be connected by liner support with down-hole string.Directly be installed on on-the-spot down-hole and test, guaranteed the consistance of operating condition of test and actual condition, thereby guaranteed correctness, the reliability of test figure.And can be arranged in as required the position of down-hole different depth, carry out detection and the research of the tubing and casing corrosion condition of down-hole different depth.
The technical scheme of the preferred a kind of down-hole string bimetallic corrosion pick-up unit of the utility model is that described bimetallic corrosion detecting element is set to have metal testing plate A and the metal testing plate B of different potentials and form galvanic couple to the bimetallic corrosion detecting element forming by two kinds.
The technical scheme of the preferred a kind of down-hole string bimetallic corrosion pick-up unit of the utility model is that described metal testing plate A is connected by screw thread pair with two described liner caps from two ends respectively with described metal testing plate B.
Can adjust on demand the Area Ratio of the metal testing plate of two kinds of different potentials, to be determined at different area than under condition, the corrosion condition of the metal testing plate galvanic couple that two kinds of different metal materials are made.
The technical scheme of another preferred a kind of down-hole string bimetallic corrosion pick-up unit of the utility model is that described liner cap is secured by bolts in described helmet.
The technical scheme of another preferred a kind of down-hole string bimetallic corrosion pick-up unit of the utility model is that described bimetallic corrosion detecting element, described liner cap, described helmet are connected into one-piece construction by auxiliary lacing wire.
The technical scheme of another preferred a kind of down-hole string bimetallic corrosion pick-up unit of the utility model is that the one-piece construction that described bimetallic corrosion detecting element, described liner cap, described helmet form is fixed on liner support by set bolt.
The technical scheme of another preferred a kind of down-hole string bimetallic corrosion pick-up unit of the utility model is to be provided with insulation course between described bimetallic corrosion detecting element, described liner cap, described helmet and described liner support.
The technical scheme of another preferred a kind of down-hole string bimetallic corrosion pick-up unit of the utility model is that described liner support is set to internal lining pipe.
The technical scheme of the preferred a kind of down-hole string bimetallic corrosion pick-up unit of the utility model is to be provided with insulation course between described bimetallic corrosion detecting element, described liner cap, described helmet and described internal lining pipe.
The technical scheme of the further a kind of down-hole string bimetallic corrosion pick-up unit of the utility model is that described insulation course is set to all be covered in the insulation course of described internal lining pipe outer surface.
The beneficial effects of the utility model:
Due to, a kind of down-hole string bimetallic corrosion pick-up unit of the present utility model, include bimetallic corrosion detecting element, liner cap, helmet, liner support, bimetallic corrosion detecting element is set at least by the metal testing plate of two kinds of metals and forms galvanic couple to the bimetallic corrosion detecting element forming, between metal testing plate, in adjustable distance mode, arrange, liner cap is two, the fixing metal test piece that is clamped and connected from two ends respectively of two liner caps, helmet is two, two liner caps are individually fixed in two helmets, bimetallic corrosion detecting element, liner cap, helmet connects into one-piece construction, and be fixed on liner support.
Thus, whole down-hole string bimetallic corrosion pick-up unit can be connected by liner support with down-hole string.Directly be installed on scene and be positioned over down-hole and test, guaranteed the consistance of operating condition of test and actual condition, thereby guaranteed correctness, the reliability of test figure.But also can adjust according to demand the Area Ratio of the metal testing plate of two kinds of different potentials, to be determined at different area than under condition, the corrosion condition of the metal testing plate galvanic couple that two kinds of different metal materials are made, guarantee the accuracy of testing result, the position of down-hole different depth be can be arranged in, detection and the research of the tubing and casing corrosion condition of down-hole different depth carried out.
Therefore, the utility model compared with prior art has can be directly installed on down-hole string, adopts adjustable structure, can detect any two kinds of metal materials and arbitrary area than time there is the feature of bimetallic corrosion situation.
As a kind of down-hole string bimetallic corrosion pick-up unit of the present utility model is applied in the test of Wenchang Oilfield Group, can analyze accurately 1Cr sleeve pipe and the 13Cr sleeve pipe bimetallic corrosion speed under oil well condition condition.
Accompanying drawing explanation
The utility model is described in further detail to utilize accompanying drawing, but embodiment in accompanying drawing does not form any restriction of the present utility model.
Fig. 1 is the structural representation of a kind of down-hole string bimetallic corrosion pick-up unit of the present utility model.
In Fig. 1, can not have:
1---internal lining pipe, 2---helmet,
3---metal testing plate A, 4---metal testing plate B, 5---insulation course,
6---auxiliary lacing wire, 7---liner cap, 8---set bolts.
Embodiment
With the following Examples the utility model is further described.
One of embodiment of a kind of down-hole string bimetallic corrosion pick-up unit of the present utility model, as shown in Figure 1, include bimetallic corrosion detecting element, liner cap 7, helmet 2, liner support, bimetallic corrosion detecting element is set at least by the metal testing plate of two kinds of metals and forms galvanic couple to the bimetallic corrosion detecting element forming, between metal testing plate, in adjustable distance mode, arrange, liner cap 7 is two, the fixing metal test piece that is clamped and connected from two ends respectively of two liner caps 7, helmet 2 is two, two liner caps 7 are individually fixed in two helmets 2, bimetallic corrosion detecting element, liner cap 7, helmet 2 connects into one-piece construction, and be fixed on liner support.
Thus, whole down-hole string bimetallic corrosion pick-up unit can be connected by liner support with down-hole string.Directly be installed on on-the-spot down-hole and test, guaranteed the consistance of operating condition of test and actual condition, thereby guaranteed correctness, the reliability of test figure.And can be arranged in as required the position of down-hole different depth, carry out detection and the research of the tubing and casing corrosion condition of down-hole different depth.
Concrete, bimetallic corrosion detecting element can be set to have metal testing plate A 3 and the metal testing plate B 4 of different potentials and form galvanic couple to the bimetallic corrosion detecting element forming by two kinds.
More specifically, metal testing plate A 3 can be connected by screw thread pair with two liner caps 7 from two ends respectively with metal testing plate B 4.So that adjust spacing and Area Ratio and installing/dismounting.
Can adjust on demand the Area Ratio of the metal testing plate of two kinds of different potentials, to be determined at different area than under condition, the corrosion condition of the metal testing plate galvanic couple that two kinds of different metal materials are made.
embodiment 2
One of embodiment of a kind of down-hole string bimetallic corrosion pick-up unit of the present utility model, as shown in Figure 1, the main technical schemes of the present embodiment is substantially the same manner as Example 1, the feature not laying down a definition in the present embodiment, adopt the explanation in embodiment 1, at this, no longer repeat.The difference of the present embodiment and embodiment 1 is: liner cap 7 is secured by bolts in helmet 2.So that mounting or dismounting.
Concrete, bimetallic corrosion detecting element, liner cap 7, helmet 2 can be connected into one-piece construction by auxiliary lacing wire 6.To strengthen whole rigidity and stability.
Concrete, the one-piece construction that bimetallic corrosion detecting element, liner cap 7, helmet 2 form can be secured by bolts in liner support.To facilitate mounting or dismounting.
One of embodiment of a kind of down-hole string bimetallic corrosion pick-up unit of the present utility model, as shown in Figure 1, the main technical schemes of the present embodiment is substantially the same manner as Example 1, the feature not laying down a definition in the present embodiment, adopt the explanation in embodiment 1, at this, no longer repeat.The difference of the present embodiment and embodiment 1 is: between bimetallic corrosion detecting element, liner cap 7, helmet 2 and liner support, be provided with insulation course 5.With insulator separation, go for the liner support that different materials is made.
Concrete, liner support can also be set to internal lining pipe 1.So that liner supporting structure is more simple compact, and process, install, dismantle more convenient.
More specifically, between bimetallic corrosion detecting element, liner cap 7, helmet 2 and internal lining pipe 1, be provided with insulation course 5.The internal lining pipe 1 of making to be applicable to different materials.
Further, insulation course 5 is set to all be covered in the insulation course 5 of internal lining pipe 1 outer surface.All be covered in the structure setting of the insulation course 5 of internal lining pipe 1 outer surface, structure is more simple compact, and is more beneficial to processing, installation, dismounting.
The concrete using method of a kind of down-hole string bimetallic corrosion pick-up unit of the present utility model is summarized as follows: select two kinds of metal testing plates for testing, and determine its exposed area; Two kinds of metal testing plates are installed on to this down-hole string bimetallic corrosion pick-up unit; This down-hole string bimetallic corrosion pick-up unit is installed on experiment oil pipe used; After certain hour, take off this down-hole string bimetallic corrosion pick-up unit; Then adopt weight-loss method to calculate the corrosion rate of metal testing plate, and describe different parts corrosion rate; Analyze data, draw experiment and test result.
Finally should be noted that; above embodiment is the restriction in order to the technical solution of the utility model to be described but not to the utility model protection domain only; although the utility model is explained in detail with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify or be equal to replacement the technical solution of the utility model, and not depart from essence and the scope of technical solutions of the utility model.
Claims (10)
1. a down-hole string bimetallic corrosion pick-up unit, it is characterized in that: include bimetallic corrosion detecting element, liner cap, helmet, liner support, described bimetallic corrosion detecting element is set at least by the metal testing plate of two kinds of metals and forms galvanic couple to the bimetallic corrosion detecting element forming, between described metal testing plate, in adjustable distance mode, arrange, described liner cap is two, two described liner caps are clamped and connected from two ends respectively and fix described metal testing plate, described helmet is two, two described liner caps are individually fixed in described two described helmets, described bimetallic corrosion detecting element, described liner cap, described helmet connects into one-piece construction, and be fixed on described liner support.
2. down-hole string bimetallic corrosion pick-up unit according to claim 1, is characterized in that: described bimetallic corrosion detecting element is set to have metal testing plate A and the metal testing plate B of different potentials and form galvanic couple to the bimetallic corrosion detecting element forming by two kinds.
3. down-hole string bimetallic corrosion pick-up unit according to claim 2, is characterized in that: described metal testing plate A is connected by screw thread pair with two described liner caps from two ends respectively with described metal testing plate B.
4. down-hole string bimetallic corrosion pick-up unit according to claim 1 and 2, is characterized in that: described liner cap is secured by bolts in described helmet.
5. down-hole string bimetallic corrosion pick-up unit according to claim 1 and 2, is characterized in that: described bimetallic corrosion detecting element, described liner cap, described helmet are connected into one-piece construction by auxiliary lacing wire.
6. down-hole string bimetallic corrosion pick-up unit according to claim 1 and 2, is characterized in that: the one-piece construction that described bimetallic corrosion detecting element, described liner cap, described helmet form is fixed on liner support by set bolt.
7. down-hole string bimetallic corrosion pick-up unit according to claim 1 and 2, is characterized in that: between described bimetallic corrosion detecting element, described liner cap, described helmet and described liner support, be provided with insulation course.
8. down-hole string bimetallic corrosion pick-up unit according to claim 1 and 2, is characterized in that: described liner support is set to internal lining pipe.
9. down-hole string bimetallic corrosion pick-up unit according to claim 8, is characterized in that: between described bimetallic corrosion detecting element, described liner cap, described helmet and described internal lining pipe, be provided with insulation course.
10. down-hole string bimetallic corrosion pick-up unit according to claim 9, is characterized in that: described insulation course is set to all be covered in the insulation course of described internal lining pipe outer surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320271934.XU CN203443884U (en) | 2013-05-17 | 2013-05-17 | Down-hole tube column galvanic corrosion detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320271934.XU CN203443884U (en) | 2013-05-17 | 2013-05-17 | Down-hole tube column galvanic corrosion detection device |
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| Publication Number | Publication Date |
|---|---|
| CN203443884U true CN203443884U (en) | 2014-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320271934.XU Expired - Fee Related CN203443884U (en) | 2013-05-17 | 2013-05-17 | Down-hole tube column galvanic corrosion detection device |
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| CN (1) | CN203443884U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103278442A (en) * | 2013-05-17 | 2013-09-04 | 中国海洋石油总公司 | Underground pipe column galvanic corrosion detecting device |
-
2013
- 2013-05-17 CN CN201320271934.XU patent/CN203443884U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103278442A (en) * | 2013-05-17 | 2013-09-04 | 中国海洋石油总公司 | Underground pipe column galvanic corrosion detecting device |
| CN103278442B (en) * | 2013-05-17 | 2016-02-17 | 中国海洋石油总公司 | A kind of underground pipe column galvanic corrosion pick-up unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140219 Termination date: 20160517 |
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| CF01 | Termination of patent right due to non-payment of annual fee |