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Combined electrode for determining sulphur ion of drilling fluids

A technology of combining electrodes and sulfide ions, applied in the field of electrodes, can solve the problems of tight space and limited space, and achieve the effect of improved cost performance and compact structure

Inactive Publication Date: 2008-07-09
SHANGHAI GASOLINEEUM & CHEM EQUIP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In addition, the space available for installing instruments on the drilling site is limited, and the installation of three additional instruments will make the originally limited space even tighter.

Method used

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  • Combined electrode for determining sulphur ion of drilling fluids
  • Combined electrode for determining sulphur ion of drilling fluids

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Embodiment

[0021] As shown in Figure 1, it is a schematic structural diagram of a combined electrode for determining sulfur ions in drilling fluid. The combined electrode for determining sulfur ions in a drilling fluid consists of a solid reference electrode 1, a signal processing circuit 2, and a solid-state reference electrode 1. 2- Measuring electrode 3, pH - Composed of measuring electrode 4 and temperature probe 5, signal processing circuit 2 is connected with solid reference electrode 1, S 2- Measuring electrode 3, pH - The measuring electrode 4 is connected to the temperature probe 5 .

[0022] As shown in Figure 2, it is a block diagram of a signal processing circuit. The signal processing circuit 2 is composed of an impedance buffer stage 6, an amplifier circuit 7, an AD converter 8, a single-chip microcomputer 9 and a DA circuit 10, and the impedance buffer stage 6 passes through the amplifier circuit. 7 is connected with AD converter 8, and AD converter 8 is connected with D...

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Abstract

The invention relates to a composite electrode for measuring sulfur ions in drilling fluid, which is characterized in that the composite electrode is composed of a solid-state reference electrode, a signal processing circuit, a S<2-> measurement electrode, a PH<-> measurement electrode and a temperature probe, wherein, the signal processing circuit is respectively connected with the solid-state reference circuit, the S<2-> measurement electrode, the PH<-> measurement electrode and the temperature probe. The invention has the advantages that the solid-state electrode is more suitable for drilling liquid, the S<2-> measurement electrode and the PH<-> measurement electrode share the solid-state reference electrode, the S<2-> measurement electrode, the PH<-> measurement electrode and the solid-state reference electrode can be replaced independently with improved performance-price ratio. By combining three instruments into one instrument, the invention has compact structure and is especially suitable for online detection of sulfur ions of drilling liquid.

Description

technical field [0001] The invention relates to a combined electrode for measuring sulfur ions in drilling fluid, which belongs to the technical field of electrodes. Background technique [0002] h 2 S is a gas that is weakly acidic and easily soluble in water. When it is dissolved in water, H - 、H + , S 2- Plasma forms exist, and show different concentration ratios with the pH value of the aqueous solution; therefore, the H in the solution can be measured + , S 2- concentration, predicted H 2 Possibility of S gas overflow, guarantee for drilling safety, and H 2 Compared with the determination of S gas content, this method can detect H 2 S is abnormal, and has predicted H 2 The ability to generate S gas. [0003] H in solution + , S 2- The methods for measuring concentration are: [0004] h + The most commonly used and simplest method of determination is to use a pH electrode to directly measure the pH value of the solution to calculate the H + Concentration, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30E21B49/08
Inventor 毕东杰沈亚光
Owner SHANGHAI GASOLINEEUM & CHEM EQUIP
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