Online drilling fluid chloride ion detector

Abstract

The utility model discloses an online drilling fluid chloride ion detector which comprises a frame body, a quantitative slurry pump, a drilling fluid separator, a water tank, a liquid mixer, a chloride ion probe and a controller, wherein the quantitative slurry pump, the drilling fluid separator, the water tank, the liquid mixer, the chloride ion probe and the controller are arranged on the frame body; the quantitative slurry pump sucks drilling fluid through a drilling fluid inlet pipeline and discharges the drilling fluid into a drilling fluid separator through a drilling fluid outlet pipeline, the drilling fluid separator is used for separating the drilling fluid into turbid liquid and clear liquid, the turbid liquid is discharged through a drilling fluid turbid liquid pipeline, and the clear liquid is discharged through a clear liquid outlet pipeline. Discharging the clear liquid into a liquid mixer through a drilling fluid clear liquid pipeline; according to the chloridion concentration measuring device, the drilling fluid is separated through the drilling fluid separator, the separated clear liquid and clear water are diluted, and then the concentration of chloridion is measured, so that the measuring timeliness can be met, the probe can be prevented from being damaged by turbid drilling fluid, the measuring accuracy is improved, and the chloridion detection range can be enlarged.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of drilling fluid analysis, in particular to an online drilling fluid chloride ion detector. BACKGROUND

[0002] Drilling fluid is an important part of circulating mud in the drilling process of oil, natural gas, water sources, etc. Drilling fluid is a complex substance made of various substances (such as water, mud, saturated brine, polymer, chemical additives, etc.) in a specific proportion. Drilling fluid plays a role in suppressing formation pressure, stabilizing the well wall, cooling the drilling tool, carrying rock cuttings, and maintaining the strength of the well wall in the drilling operation.

[0003] There are various types of drilling fluid, and the specific formula is determined according to factors such as geological conditions, drilling depth, drilling target, etc. Chloride ion is an important evaluation index in drilling fluid, because factors such as the depth, temperature, and pressure of the wellhead during drilling can cause changes in the chloride ion content in the drilling fluid. When the chloride ion concentration is too high or too low, it will have adverse effects. When the chloride ion concentration is too high, it will cause the electrical properties of the drilling fluid to deteriorate and reduce the flushing ability of the drill bit, which may cause the drilling hole to deviate from the track; when the chloride ion is too low, it will increase the corrosiveness of the drilling fluid, thereby adversely affecting the well wall, and even causing the wellbore to collapse, affecting normal drilling operations.

[0004] By measuring the changes in the chloride ion content in the drilling fluid, the changes in the performance of the drilling fluid can be understood, and the drilling fluid formula can be adjusted in a timely manner to ensure safe and normal drilling operations.

[0005] In addition, changes in the salinity of the formation will also affect the salinity of the drilling fluid. By measuring the chloride ion concentration, the properties of the water layer, abnormal pressure formation, whether there is a salt rock layer, etc. can be analyzed and judged, and the sedimentary facies can be divided. Abnormal chloride ion concentration is usually an indication of a water layer.

[0006] The current detection methods for chloride ions in drilling fluid on site are:

[0007] Manual titration method: first filter the drilling fluid, extract the liquid, and then manually detect the chloride ions in the liquid. The technical problems of this method are long time and low efficiency.

[0008] Automatic detection method: the probe (sensor) is directly inserted into the drilling fluid, but the drilling fluid continuously damages the probe, causing the detected chloride ion value to be inaccurate, and the range is small (maximum 35000 ppm), while the maximum chloride ion content in the drilling fluid can reach 300000 ppm.

[0009] The so-called online drilling fluid ion detector on the market at present is to detect the salinity of the drilling fluid to represent the concentration of chloride ions in the drilling fluid, which is not scientific at all. The detected value is several times different from the actual value.

[0010] Therefore, the above detection method cannot detect the concentration of chloride ions in the drilling fluid in time or accurately, so that the deviation of the drilling hole from the track and the collapse of the borehole cannot be found in time, and the drilling fluid formula cannot be adjusted in time and the sedimentary facies cannot be divided. Practical new type content

[0011] The purpose of the present application is to provide an online drilling fluid chloride ion detector to realize timely and accurate detection of the concentration of chloride ions in the drilling fluid.

[0012] To achieve the above purpose, the technical scheme provided by the present application is as follows:

[0013] An online drilling fluid chloride ion detector, comprising a frame body and a quantitative mud pump, a drilling fluid separator, a water tank, a liquid mixer, a chloride ion probe and a controller mounted on the frame body;

[0014] The quantitative mud pump sucks the drilling fluid through a drilling fluid inlet pipeline and discharges the drilling fluid into the drilling fluid separator through a drilling fluid outlet pipeline, the drilling fluid separator is used for separating the drilling fluid into turbid liquid and clear liquid, discharging the turbid liquid through a drilling fluid turbid liquid pipeline and discharging the clear liquid into the liquid mixer through a drilling fluid clear liquid pipeline;

[0015] The water tank is provided with clean water, which is discharged into the liquid mixer through a clean water pipeline;

[0016] The chloride ion probe is inserted into the liquid mixer and connected with the controller through a data line, and the data collected by the chloride ion probe is transmitted to the controller.

[0017] Further, the lower end of the frame body is provided with moving wheels for moving the frame body.

[0018] Further, a first adjusting valve for controlling the flow of the clean water pipeline is arranged on the clean water pipeline, and a second adjusting valve for controlling the flow of the drilling fluid clear liquid pipeline is arranged on the drilling fluid clear liquid pipeline.

[0019] Further, a pressure gauge for detecting the pressure of the drilling fluid separator and a pressure reducing valve for controlling the flow of the drilling fluid turbid liquid pipeline are arranged on the drilling fluid turbid liquid pipeline.

[0020] Further, a liquid storage tank is arranged on the drilling fluid clear liquid pipeline, the liquid storage tank is provided with an overflow port, and a pipeline provided with an overflow valve is connected to the overflow port.

[0021] Further, the backwashing assembly comprises a valve-equipped tee a arranged on the drilling fluid slurry pipeline and a valve-equipped tee b arranged on the drilling fluid outlet pipeline.

[0022] Further, the liquid mixer discharges liquid therein through a discharge pipeline, and the discharge pipeline is provided with a tee c, through which the discharge pipeline is divided into a first branch pipeline provided with a third regulating valve and a second branch pipeline, and the liquid discharged by the first branch pipeline is the same as the liquid added by the fresh water pipeline.

[0023] Further, a distribution box for power supply is arranged on the frame.

[0024] Further, an upper computer is arranged, and the controller is in communication connection with the upper computer.

[0025] Compared with the prior art, the beneficial effects of the online drilling fluid chloride ion detector are as follows:

[0026] The drilling fluid is separated by the drilling fluid separator, the separated clear liquid is diluted with fresh water, and the concentration of chloride ions is measured, so that the timeliness of measurement is met, the probe is prevented from being damaged by the drilling fluid slurry, the accuracy of measurement is improved, the chloride ion detection range is enlarged, the use effect is good, and the online drilling fluid chloride ion detector is convenient to promote and use in the industry. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 Fig. 1 is a structural schematic diagram of an online drilling fluid chloride ion detector provided by an embodiment of the present application. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0029] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0030] In the description of the present patent, it should be noted that unless otherwise explicitly specified and limited, the terms "mount", "connect", "connect", "set" should be understood broadly, for example, it can be fixedly connected, set, or detachably connected, set, or integrally connected, set, which can refer to direct connection or indirect connection. For those skilled in the art, the specific meaning of the above terms in the present patent can be understood according to the specific circumstances.

[0031] As Figure 1 The utility model provides an embodiment structure provided by the utility model.

[0032] The embodiment provides an online drilling fluid chloride ion detector, which comprises a frame body and a quantitative mud pump, a drilling fluid separator, a water tank, a liquid mixer, a chloride ion probe and a controller mounted on the frame body.

[0033] The quantitative mud pump sucks drilling fluid through a drilling fluid inlet pipeline and discharges the drilling fluid into the drilling fluid separator through a drilling fluid outlet pipeline, the drilling fluid separator is used for separating the drilling fluid into turbid liquid and clear liquid, discharging the turbid liquid through a drilling fluid turbid liquid pipeline and discharging the clear liquid into the liquid mixer through a drilling fluid clear liquid pipeline.

[0034] The water tank is provided with clean water, which is discharged into the liquid mixer through a clean water pipeline.

[0035] The chloride ion probe is inserted into the liquid mixer and is connected with the controller through a data line, and the data collected by the chloride ion probe is transmitted to the controller.

[0036] It should be noted that the controller outputs the processing result of the data. After the clear liquid is diluted by adding clean water, the measurement data obtained can be amplified by the same dilution ratio, so that the accurate concentration value can be obtained, and the chloride ion detection range is also expanded. In addition, the controller can output RS-485 signals or analog signals to the upper computer.

[0037] It should be noted that the liquid mixer is a container for diluting the clear liquid containing high-concentration chloride ions discharged from the separator.

[0038] It should be noted that the drilling fluid separator adopts an existing solid-liquid separation device, and the power is driven by a motor.

[0039] It should be noted that the quantitative mud pump comprises a motor, a speed reducer and a diaphragm pump.

[0040] The lower end of the frame body is provided with a moving wheel for moving the frame body. With this structure, the detector can be conveniently moved as required.

[0041] The first regulating valve is arranged on the clear water pipeline to control the flow thereof, and the second regulating valve is arranged on the drilling fluid clear liquid pipeline to control the flow thereof.

[0042] It should be noted that the above structure can control the flow, thereby controlling the respective proportions of the mixed liquids.

[0043] Preferably, a pressure gauge for detecting the pressure of the drilling fluid separator and a pressure reducing valve for controlling the flow of the drilling fluid turbid liquid pipeline are arranged on the drilling fluid turbid liquid pipeline.

[0044] Preferably, a liquid storage tank is arranged on the drilling fluid clear liquid pipeline, the liquid storage tank is provided with an overflow port, and a pipeline provided with an overflow valve is connected to the overflow port.

[0045] Preferably, the detector further comprises a backwashing assembly, the backwashing assembly comprises a valve-equipped tee a arranged on the drilling fluid turbid liquid pipeline and a valve-equipped tee b arranged on the drilling fluid outlet pipeline. The above structure can backwash the drilling fluid separator.

[0046] Preferably, the liquid mixer discharges the liquid therein through a discharge pipeline, the discharge pipeline is provided with a tee c, the discharge pipeline is divided into a first branch pipeline provided with a third regulating valve and a second branch pipeline through the tee c, and the liquid discharged from the first branch pipeline is the same as the liquid added from the clear water pipeline.

[0047] It should be noted that the above structure, the liquid discharged from the first branch pipeline is the same as the liquid added from the clear water pipeline, the liquid discharged from the second branch pipeline enters B, and the amount of the drilling fluid extracted from A is the same as the amount of the liquid discharged into B (including the amount of the liquid discharged from the second branch pipeline and the amount of the separated drilling fluid turbid liquid).

[0048] The power distribution box for power supply is further mounted on the frame.

[0049] The upper computer is further included, and the controller is in communication connection with the upper computer.

[0050] The specific measurement process can be as follows:

[0051] The drilling fluid is extracted from A (which can be container A) by a quantitative (for example, 12.5 liters per minute) mud pump at the bottom of the frame body into the drilling fluid separator. The drilling fluid separator is rotated by the shaft of the separator body driven by the decelerated motor, and the pressure reducing valve in the separator body is adjusted until the pressure gauge reaches the requirement. The separated drilling fluid turbidity enters B (which can be container B). The separated drilling fluid clear liquid enters the liquid mixer. The clear water from the clear water tank enters the liquid mixer, and the flow of the clear water is controlled by the valve. The flow of the clear water can be 9 times that of the clear liquid from the separator. The chloride ion probe is placed in the liquid mixer for chloride ion detection. The detection result is transmitted to the upper computer after being enlarged by the control box (the value can be enlarged according to the original dilution ratio). The liquid discharged from the second branch pipeline in the liquid mixer flows into B.

[0052] It should be noted that the upper computer is a PC, which can be placed in the detection instrument placement room, and which can be transmitted to the controller through wired or wireless transmission.

[0053] It should be noted that the present application does not involve the innovation of the method, and the electronic devices involved include but are not limited to the controller, the upper computer, the chloride ion probe, the pressure gauge, the drilling fluid separator, etc., which are all externally purchased and all use known technologies.

[0054] It should be noted that the schemes not described in detail in the present application all use known technologies.

[0055] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only preferred examples of the present application and do not limit the present application. Without departing from the spirit and scope of the present application, the present application can also have various changes and improvements, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. An on-line drilling fluid chloride detector, characterized by, The mud pump, the mud separator, the water tank, the liquid mixer, the chloride ion probe and the controller are installed on the frame. The mud pump sucks drilling fluid through the drilling fluid inlet pipeline and discharges the drilling fluid into the mud separator through the drilling fluid outlet pipeline. The water tank contains clean water which is discharged into the liquid mixer through the clean water pipeline. The chloride ion probe is inserted into the liquid mixer and connected with the controller through a data line.

2. The online drilling fluid chloride detector according to claim 1, wherein, The lower end of the frame is provided with moving wheels for moving the frame.

3. The online drilling fluid chloride detector according to claim 1, wherein, The clean water pipeline is provided with a first regulating valve for controlling the flow rate thereof.

4. The on-line drilling fluid chloride detector of claim 1, wherein, The drilling fluid outlet pipeline is provided with a pressure gauge for detecting the pressure of the mud separator and a pressure reducing valve for controlling the flow rate of the drilling fluid outlet pipeline.

5. The on-line drilling fluid chloride detector of claim 1, wherein, The drilling fluid outlet pipeline is provided with a liquid storage tank which is provided with an overflow opening connected with a pipeline provided with an overflow valve.

6. The on-line drilling fluid chloride detector of claim 1, wherein, The backwashing assembly includes a valve-equipped tee a provided on the drilling fluid outlet pipeline and a valve-equipped tee b provided on the drilling fluid outlet pipeline.

7. The online drilling fluid chloride detector of claim 1, wherein, The liquid mixer discharges liquid therefrom through a discharge pipeline which is provided with a tee c through which the discharge pipeline is divided into a first branch pipeline provided with a third regulating valve and a second branch pipeline.

8. The on-line drilling fluid chloride detector of claim 1, wherein, A power distribution box for supplying power is installed on the frame.

9. The online drilling fluid chloride detector of claim 1, wherein, A host computer is further included and the controller is in communication connection with the host computer.

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