CN215894473U - Suspension chloride ion online measurement device - Google Patents
Suspension chloride ion online measurement device Download PDFInfo
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- CN215894473U CN215894473U CN202122207227.1U CN202122207227U CN215894473U CN 215894473 U CN215894473 U CN 215894473U CN 202122207227 U CN202122207227 U CN 202122207227U CN 215894473 U CN215894473 U CN 215894473U
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- chloride ion
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Abstract
The utility model discloses a suspension liquid chloride ion online measuring device which comprises a chloride ion composite electrode, wherein the chloride ion composite electrode is directly placed in a suspension liquid of drilling fluid to be measured; the chloride ion composite electrode comprises a reference electrode end and a chloride ion selective electrode end, so that the suspension liquid chloride ion online measuring device is placed in the drilling fluid to form a stable chloride ion potential; the impurity filtering structure is pasted on the contact surface of the chloride ion selective electrode end of the composite electrode and the drilling fluid, so that fine particle impurities in the drilling fluid are isolated and filtered, and ions are diffused and pass through the ion channel; the porous filtering structure is arranged on the contact surface of the reference electrode end and the drilling fluid, so that the invasion of suspended particles in the drilling fluid is prevented, and the accuracy of reference measurement is influenced; and the diaphragm shell is arranged on the periphery of the contact surface of the chloride ion selective electrode end and the drilling fluid. The utility model can measure the chloride ion concentration in the suspension liquid of a complex system such as drilling fluid on line.
Description
Technical Field
The utility model relates to the technical field of geological logging engineering in an oil drilling site, in particular to an online measuring device for the chloride ion concentration of drilling fluid in the drilling site.
Background
During the drilling process, the measurement of the content of chloride ions in the drilling fluid can visually reflect the underground water condition of the drilling stratum, which plays an important role in the well kick early warning and forecasting during the drilling process and is related to the safety of the drilling engineering.
In the prior art, the chlorine ion measurement of drilling fluid is performed by chemical analysis titration by manual sampling, online real-time monitoring cannot be realized, and the analysis quality is also influenced by the quality difference of personnel.
In addition, the chloride ion electrode with the conventional structure is very easily influenced by a large amount of barium sulfate barite powder particles for proportioning in a high-solid-content drilling fluid suspension, so that the irreversible deviation of the measured basic value is caused, and the final detection result is influenced.
Therefore, a drilling fluid chloride ion online measurement device and method with simple structure and low cost are needed, which can improve the drilling safety, prolong the service life of the sensor and improve the user acceptance while solving the existing problems.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects in the prior art, the utility model aims to provide the device for measuring the chloride ions in the suspension liquid on line, which has a simple structure and low cost.
In order to realize the purpose, the adopted technical scheme is as follows:
an online measurement device for chloride ions in suspension liquid comprises:
the chloride ion composite electrode is directly placed in the drilling fluid suspension to be detected;
the chloride ion composite electrode comprises at least one reference electrode end and at least one chloride ion selective electrode end, so that the suspension chloride ion online measuring device is placed in the drilling fluid to form a stable chloride ion potential;
the impurity filtering structure is attached to the contact surface of the chloride ion selective electrode end of the composite electrode and the drilling fluid, so that fine particle impurities in the drilling fluid are isolated and filtered, and ions are diffused and pass through the ion channel;
the porous filtering structure is arranged on the contact surface of the reference electrode end and the drilling fluid, so that the invasion of suspended particles in the drilling fluid is prevented, and the accuracy of reference measurement is influenced;
the setting is in the diaphragm shell of chloride ion selective electrode end and drilling fluid contact surface periphery, the diaphragm shell protect the debris erosion and corrosion of impurity filtration structure in avoiding the drilling fluid to play the structure supporting role of integral erection.
In a preferred embodiment of the present invention, the chloride composite electrode is a unitary structure or a separate structure.
In a preferred embodiment of the utility model, the impurity filtering structure is made of conductive hydrogel material, and is applied to the chloride ion selective electrode end to isolate fine particles in the drilling fluid suspension, and the impurity filtering structure allows diffusion and migration of chloride ions in the gel. Ensuring the effective contact of the chlorine ion selective electrode end to the chlorine ions.
In a preferred embodiment of the present invention, the impurity filtering structure is provided with a physical modification layer or a chemical modification layer thereon. The diffusion migration rate of the chloride ions is improved through the physical modification layer or the chemical modification layer, and the response speed of online measurement of the chloride ions is improved.
In a preferred embodiment of the present invention, the foreign substance filtering structure is internally provided with a metal mesh. The physical strength of the gel is improved by the metal mesh, and the gel is resistant to erosion and abrasion.
In a preferred embodiment of the present invention, the impurity filtering structure has a thickness of 2mm, a 400-mesh stainless steel net is built in, and a chloride ion diffusion response speed t is 1mol/L80Less than 30 seconds.
In a preferred embodiment of the utility model, the diaphragm casing is made of stainless steel and is fixed on the periphery of the contact surface of the chloride ion selective electrode end and the drilling fluid in a radial pre-tightening manner through a clamp.
In a preferred embodiment of the utility model, the membrane housing or the impurity filtering structure is detachably arranged.
The utility model has the beneficial effects that:
the device and the method for online measurement of the chloride ions in the suspension liquid have the advantages of simple structure and low cost, can realize online measurement of the concentration of the chloride ions in the drilling liquid, and improve the stability and accuracy of the online measurement. The method can replace the traditional detection method of manual sampling chemical titration, realize the whole-process monitoring of the concentration change of the chloride ions in the drilling fluid in the drilling process and improve the safety of the drilling engineering.
Drawings
Fig. 1 is a schematic structural diagram of a suspension chloride ion online measurement device in the present invention.
Detailed Description
The technical content, constructional features, achieved objects and effects of the utility model are described in detail below by means of a preferred embodiment in connection with fig. 1.
The online measurement device for chloride ions in suspension liquid shown in fig. 1 includes a chloride ion composite electrode 100, and the chloride ion composite electrode 100 is directly placed in a suspension liquid (not shown in the figure) of drilling fluid to be measured.
The chloride composite electrode 100 includes a reference electrode terminal 110 and a chloride selective electrode terminal 120, wherein a plurality of reference electrode terminals 110 shown in fig. 1 may be provided, and the chloride selective electrode terminal 120 is located downward relative to the reference electrode terminal 110.
An impurity filtering structure 130 made of conductive hydrogel is attached to a contact surface 121 of the chloride ion selective electrode end 120 of the composite electrode and the drilling fluid, so that fine particle impurities in the drilling fluid are isolated and filtered, and ions are diffused and pass through an ion channel in the impurity filtering structure 130.
And in particular, fine particles in the drilling fluid suspension, while the impurity filtering structure 130 allows for diffusive transport of chloride ions within the gel. Ensure the effective contact of the chloride ion selective electrode terminal to chloride ions
A porous filtering structure 140 is arranged on a contact surface 111 of a reference electrode end 110 of the composite electrode and the drilling fluid, and the invasion of suspended particles in the drilling fluid is prevented through filtering pores, so that the accuracy of reference measurement is prevented from being influenced.
In order to further improve the stability of the whole structure, a stainless steel diaphragm casing 150 is arranged on the periphery of the contact surface 121 of the chloride ion selective electrode end and the drilling fluid, and the diaphragm casing 150 is fixed on the periphery of the contact surface 121 of the chloride ion selective electrode end and the drilling fluid in a radial pre-tightening manner through clasping.
The membrane housing 150 protects the impurity filtering structure 130 from erosion by debris in the drilling fluid and serves as a structural support for the overall installation.
In order to further improve the performance, a physical modification layer or a chemical modification layer is disposed on the impurity filtering structure 130. The diffusion migration rate of the chloride ions is improved through the physical modification layer or the chemical modification layer, and the response speed of online measurement of the chloride ions is improved.
Further, a metal mesh is provided in the impurity filter structure 130, and the metal mesh improves physical strength, corrosion resistance, and abrasion resistance of the impurity filter structure.
For example, the thickness of the impurity filtering structure is 2mm, a 400-mesh stainless steel net is arranged in the impurity filtering structure, and the diffusion response speed t of 1mol/L chloride ions is 1mol/L80Less than 30 seconds.
The chloride ion composite electrode is arranged in an integrated structure or an independent structure, and the membrane shell 150 or the impurity filtering structure 130 is arranged in a detachable way.
The working principle of the suspension liquid chloride ion online measuring device provided by the utility model is as follows:
the sensitive chloride ion selective electrode end 120 is physically isolated from the drilling fluid through the impurity filtering structure 130, so that barium sulfate barite fine particles in the drilling fluid are prevented from being adhered to the surface of the chloride ion selective electrode end 120 to influence the measurement accuracy, and meanwhile, the impurity filtering structure 130 serves as a channel for rapid diffusion and migration of ions, so that the chloride ion selective electrode end 120 can form stable ionic electromotive force to measure the concentration of chloride ions on line.
The membrane housing 150 can be quickly disassembled and assembled to replace the impurity filtering structure 130 attached to the chloride selective electrode tip 120, so that the chloride composite electrode 100 can be used for a long time. The method can effectively replace the traditional detection method of manual sampling chemical titration, realize the whole-process monitoring of the concentration change of the chloride ions in the drilling fluid in the drilling process and improve the safety of the drilling engineering.
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the utility model. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the utility model should be determined from the following claims.
Claims (8)
1. The utility model provides a suspension chloride ion on-line measuring device which characterized in that includes:
the chloride ion composite electrode is directly placed in the drilling fluid suspension to be detected;
the chloride ion composite electrode comprises at least one reference electrode end and at least one chloride ion selective electrode end, so that the suspension chloride ion online measuring device is placed in the drilling fluid to form a stable chloride ion potential;
the impurity filtering structure is attached to the contact surface of the chloride ion selective electrode end of the composite electrode and the drilling fluid, so that fine particle impurities in the drilling fluid are isolated and filtered, and ions are diffused and pass through the ion channel;
the porous filtering structure is arranged on the contact surface of the reference electrode end and the drilling fluid, so that the invasion of suspended particles in the drilling fluid is prevented, and the accuracy of reference measurement is influenced;
the setting is in the diaphragm shell of chloride ion selective electrode end and drilling fluid contact surface periphery, the diaphragm shell protect the debris erosion and corrosion of impurity filtration structure in avoiding the drilling fluid to play the structure supporting role of integral erection.
2. The on-line measurement device for chloride ions in suspension liquid of claim 1, wherein the chloride ion composite electrode is of an integrated structure or an independent structure.
3. The apparatus of claim 1, wherein the impurity filtering structure is a hydrogel or an ion permeable membrane, and is applied to the chloride selective electrode tip to isolate fine particles in the drilling fluid suspension while allowing diffusion and migration of chloride ions.
4. The apparatus for on-line measurement of chloride ion in suspension according to claim 1 or 3, wherein the impurity filtering structure is provided with a physically modified layer or a chemically modified layer.
5. The online measurement device for chloride ions in suspension liquid as claimed in claim 1 or 3, wherein the impurity filtering structure is internally provided with a metal net to increase strength.
6. The online measurement device for chloride ions in suspension liquid as claimed in claim 5, wherein the thickness of the impurity filtering structure is not more than 2mm, a 400-mesh stainless steel net is arranged in the impurity filtering structure, and the diffusion response speed t of chloride ions is 1mol/L80Less than 30 seconds.
7. The device for on-line measurement of chloride ions in suspended liquid according to claim 1, wherein the diaphragm casing is made of stainless steel and is fixed on the periphery of the contact surface of the chloride ion selective electrode end and the drilling fluid in a radial pre-tightening manner through a clamp.
8. The online measurement device for the chloride ions in the suspension liquid as claimed in claim 1, wherein the membrane housing or the impurity filtering structure is detachably arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122207227.1U CN215894473U (en) | 2021-09-13 | 2021-09-13 | Suspension chloride ion online measurement device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122207227.1U CN215894473U (en) | 2021-09-13 | 2021-09-13 | Suspension chloride ion online measurement device |
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| CN215894473U true CN215894473U (en) | 2022-02-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113671007A (en) * | 2021-09-13 | 2021-11-19 | 上海神开石油科技有限公司 | Suspension chloride ion online measurement device and measurement method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113671007A (en) * | 2021-09-13 | 2021-11-19 | 上海神开石油科技有限公司 | Suspension chloride ion online measurement device and measurement method |
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