CN217846155U - Oil-based mud water content measuring device based on capacitance method - Google Patents
Oil-based mud water content measuring device based on capacitance method Download PDFInfo
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- CN217846155U CN217846155U CN202221590871.XU CN202221590871U CN217846155U CN 217846155 U CN217846155 U CN 217846155U CN 202221590871 U CN202221590871 U CN 202221590871U CN 217846155 U CN217846155 U CN 217846155U
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Abstract
The utility model discloses an oil-based mud water content measuring device based on a capacitance method, which comprises a transmitter gauge outfit, a connecting steel pipe, a probe protective cover and a detection probe; the utility model discloses a two test probe have constituted the two poles of the earth of electric capacity, oil base mud has become dielectric wherein, its moisture content changes, the dielectric constant of dielectric also changes thereupon, the capacitance value of the electric capacity that constitutes is also along with changing, borrow this to realize the high accuracy measurement to oil base mud moisture content, and detection efficiency is high, the miniaturization of device has been realized, convenient dismantlement and removal, and compare in traditional tubulose capacitive sensor, use two test probe to constitute open electric capacity, more conveniently carry out the washing of device, the maintenance, oil base mud has also been avoided remaining and influence next measurement in the probe.
Description
Technical Field
The utility model relates to a moisture content measuring device technical field especially relates to an oil base mud moisture content measuring device based on electric capacity method.
Background
The main components of the oil-based drilling fluid are oil, water, organic clay, an oil-soluble treating agent and the like, so the oil-based drilling fluid is also called as oil-based mud, compared with water-based drilling fluid, the oil-based mud has the advantages of high temperature resistance, strong stability, salt and calcium corrosion resistance, good lubricating effect, reduction of pollution to oil and gas reservoirs and the like, and has important application in the fields of high-temperature drilling, dada and high-inclination wells and the like. Meanwhile, the waste oil-based mud has potential threats to the surrounding environment and surrounding people after being stored for a long time, and the waste oil-based mud contains higher base oil, colloid, asphaltene, volatile organic compounds, heavy metals and the like which are carried out in the drilling process, so that the waste oil-based mud can damage soil vegetation, atmospheric quality and underground water quality, and even harm the physiological and biochemical functions of human and animals, and therefore, the determination of the water content in the oil-based mud has important significance to the application of the waste oil-based mud in the drilling industry and waste recovery treatment;
at present, the method for measuring the water content of the oil-based mud mainly comprises a distillation method, a drying reduction method and a radio frequency method of a water content measuring device, wherein the distillation method and the drying reduction method are used for sampling and detecting a small amount of samples, the precision is high, the time consumption is long, the measurement is complex, the online measurement cannot be realized, and the efficiency is not high; and the radio frequency method is based on the radio frequency impedance theory of medium, regards oil-based mud as the dielectric, measures the moisture content in the oil-based mud through determining its impedance characteristic change that presents to the radio frequency signal, and job stabilization, measurement accuracy are high, but its measuring device's use and maintenance are more complicated, need wash the measuring instrument at any time to because radio frequency is high inadequately, thereby measuring distinguishment is lower, and then leads to measuring accuracy not high, consequently, the utility model provides an oil-based mud moisture content measuring device based on electric capacity method is used for solving the problem that exists among the prior art.
SUMMERY OF THE UTILITY MODEL
To the above problem, the utility model aims to provide an oil base mud moisture content measuring device based on electric capacity method solves the problem that current oil base mud moisture content measuring device measuring efficiency is not high, the device structure is complicated and not convenient for use and measurement accuracy is not high.
In order to realize the utility model discloses a purpose, the utility model discloses a following technical scheme realizes: the utility model provides an oil base mud moisture content measuring device based on electric capacity method, includes changer gauge outfit, connecting steel pipe, probe protection casing and test probe, be equipped with LED digital instrument screen on the changer gauge outfit, install V/I conversion module and integrated master control circuit's PCB board in the changer gauge outfit, changer gauge outfit bottom is equipped with the crossover sub, crossover sub bottom and connecting steel pipe fixed connection, test probe is equipped with two, two test probe and two the cavity between the test probe constitutes a capacitance sensor jointly, two test probe is connected with changer gauge outfit electricity through the probe wire respectively, connecting steel pipe bottom is fixed with the stainless steel three-way pipe, stainless steel three-way pipe both sides all are connected with the stainless steel elbow pipe, stainless steel elbow pipe bottom and test probe are connected, the test probe protection casing cover is located the test probe outside.
The further improvement lies in that: the probe protection cover is a stainless steel protection cover, and the detection probes are arranged in parallel on the same horizontal plane in the probe protection cover.
The further improvement lies in that: the probe protective cover is provided with circular oil flow holes, and the circular oil flow holes are uniformly distributed on the probe protective cover.
The further improvement is that: two non-contact wire steel pipes are arranged in the connecting steel pipe, and the probe wires on the two detection probes are respectively arranged in the two non-contact wire steel pipes.
The further improvement lies in that: and a grounding wire is arranged in the connecting steel pipe, and the connecting steel pipe is connected with a power supply in the transmitter gauge outfit through the grounding wire so as to be grounded.
The further improvement is that: the two detection probes are respectively a capacitance measurement module and a PT100 temperature measurement module, and are made of nylon materials.
The utility model has the advantages that: the utility model discloses a changer gauge outfit, the connecting steel pipe, probe protection casing and test probe, the two poles of the earth of electric capacity has been constituted through two test probe, oil base mud has become dielectric wherein, its moisture content changes, the dielectric constant of dielectric also changes thereupon, the capacitance value of the electric capacity that constitutes is also along with changing, borrow this and realize the high accuracy measurement to oil base mud moisture content, and detection efficiency is high, the miniaturization of device has been realized, convenient dismantlement and removal, and compare in traditional tubulose capacitive sensor, use two test probe to constitute open electric capacity, more conveniently carry out the washing of device, the maintenance, oil base mud has also been avoided remaining and influence next measurement in the probe.
Drawings
Fig. 1 is a front view of an oil-based mud water content measuring device according to a first embodiment of the present invention;
fig. 2 is a side view of an oil-based mud water content measuring device according to a first embodiment of the present invention;
fig. 3 is a circuit connection working principle diagram of an oil-based mud water content measuring device of the second embodiment of the present invention.
Wherein: 1. a transducer head; 2. connecting the steel pipes; 3. a probe shield; 4. detecting a probe; 5. a transition joint; 6. a stainless steel three-way pipe; 7. a stainless steel elbow pipe; 8. circular flow oil hole.
Detailed Description
In order to deepen the understanding of the present invention, the following embodiments are combined to further detail the present invention, and the present embodiment is only used to explain the present invention, and does not constitute the limitation of the protection scope of the present invention.
Example one
According to the drawings 1 and 2, the embodiment provides an oil-based mud water content measuring device based on a capacitance method, which comprises a transmitter gauge outfit 1, a connecting steel pipe 2, a probe protective cover 3 and a detection probe 4, wherein an LED digital instrument screen is arranged on the transmitter gauge outfit 1, a V/I conversion module and a PCB integrated with a main control circuit are arranged in the transmitter gauge outfit 1, the main control circuit is used for carrying out data acquisition and processing on detection data to obtain the water content of oil-based mud, a transition joint 5 is arranged at the bottom end of the transmitter gauge outfit 1, the bottom end of the transition joint 5 is fixedly connected with the connecting steel pipe 2, the detection probe 4 is provided with two sheets, a cavity between the two detection probes 4 and the two detection probes 4 jointly form a capacitance sensor, the two detection probes 4 are respectively and electrically connected with the transmitter gauge outfit 1 through probe leads, a stainless steel three-way pipe 6 is fixed at the bottom end of the connecting steel pipe 2, two sides of the stainless steel three-way pipe 6 are both connected with stainless steel elbow pipes 7, the bottom ends of the stainless steel elbow pipe 7 are connected with the detection probes 4, and the probe protective cover 3 is arranged outside the detection probes 4.
The probe protective cover 3 is a stainless steel protective cover, and the detection probes 4 are arranged in parallel on the same horizontal plane in the probe protective cover 3, so that the detection precision is ensured.
The circular oil flow hole 8 is formed in the probe protective cover 3, the circular oil flow hole 8 is uniformly distributed in the probe protective cover 3, and oil-based mud can be guaranteed to uniformly flow through a cavity between the two detection probes 4, so that accurate and quick capacitance variation can be obtained.
Two wire steel pipes which are not in contact with each other are arranged inside the connecting steel pipe 2, probe wires on the two detection probes 4 are respectively arranged in the two wire steel pipes which are not in contact with each other, and through the design of mutual non-contact, the coupling capacitance between the two probe wires is sequentially eliminated, and the influence of the coupling capacitance is eliminated.
The connecting steel pipe 2 is internally provided with a grounding wire, and the connecting steel pipe 2 is connected with a power supply in the transmitter gauge head 1 through the grounding wire to perform grounding treatment, so that the safety of the device is improved, and the coupling capacitance between the grounding wire and a steel pipe fitting is eliminated.
The two detection probes 4 are respectively a capacitance measuring module and a PT100 temperature measuring module, and the two detection probes 4 are made of nylon materials.
During actual measurement, the detection probe 4 is inserted into the oil-based mud, the oil-based mud uniformly flows through a cavity between the two detection probes 4, the two detection probes 4 and the cavity between the two detection probes 4 form a capacitance sensor, the oil-based mud to be detected becomes a dielectric medium, the capacitance value is detected through the detection probe 4, detection data are sent to a main control chip in the transmitter gauge head 1 by utilizing a probe lead, and a functional relation between the water content and the capacitance value is established by taking the equivalent dielectric constant epsilon of a mixed medium as an intermediate variable:
C＝f(ε)
in the formula,. Epsilon. = g (ε) 0 ，ε w ，α)，ε 0 Is the dielectric constant of the anhydrous oil-based mud,. Epsilon w Is the dielectric constant of water, alpha is the water content of the oil-based mud;
the establishment of the function mainly relates to two aspects, namely, the capacitance of a sensor probe and an internal medium is calculated, a relation C = f (epsilon) is established, the equivalent dielectric constant of a mixed medium is further calculated according to the capacitance value, and when a coaxial capacitance sensor is adopted and only a medium to be measured is filled between two electrodes, the function relationship is as follows:
wherein L is the length of the sensor, R a Is the inner diameter of the outer electrode of the coaxial sensor, R b Calculating the outer diameter of the inner electrode of the coaxial sensor to obtain a function expression of the equivalent dielectric constant epsilon of the mixed medium;
and secondly, calculating the equivalent dielectric constant of the mixed medium, wherein the dielectric constant of a multi-phase system depends on the dielectric constant and the volume fraction of each phase and the configuration condition among the phases, the equivalent dielectric constant of the mixed medium and related mathematical models are various, and the relative dielectric constant of the whole range (0-100%) of the water content of the crude oil can be calculated by applying the models.
Example two
According to the illustration in fig. 3, the embodiment provides an oil-based mud water content measuring device, which comprises a capacitance measuring module, a PT100 temperature measuring module, a main control chip, a V/I conversion module and an LED digital display, wherein the output end of the capacitance measuring module and the output end of the PT100 temperature measuring module are both connected with a main control chip STM32F103RCT6, data acquisition and processing are realized by using the main control chip and output to the V/I conversion module, the digitalized oil-based mud water content is obtained and displayed on the LED digital display, the measured data can be transmitted remotely through a USB interface and sent to an upper computer for real-time monitoring, or online detection control is realized through an SWD debugging interface by using a conventional data processing method.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The utility model provides an oil base mud moisture content measuring device based on electric capacity method which characterized in that: including changer gauge outfit (1), connecting steel pipe (2), probe protection casing (3) and test probe (4), be equipped with LED digital instrument screen on changer gauge outfit (1), install V/I conversion module and integrated PCB board that has master control circuit in changer gauge outfit (1), changer gauge outfit (1) bottom is equipped with crossover sub (5), crossover sub (5) bottom and connecting steel pipe (2) fixed connection, test probe (4) are equipped with two, two test probe (4) and two cavity between test probe (4) constitutes a capacitive sensor jointly, two test probe (4) are connected with changer gauge outfit (1) electricity through the probe wire respectively, connecting steel pipe (2) bottom mounting has stainless steel three-way pipe (6), stainless steel three-way pipe (6) both sides all are connected with stainless steel elbow pipe (7), stainless steel elbow pipe (7) bottom and test probe (4) are connected, test probe (4) outside is located to protection casing (3) probe cover.
2. The capacitance method-based oil-based mud water content measuring device of claim 1, wherein: the probe protection cover (3) is a stainless steel protection cover, and the detection probes (4) are arranged in parallel on the same horizontal plane in the probe protection cover (3).
3. The oil-based mud water content measuring device based on the capacitance method as claimed in claim 1, wherein: the probe protection cover (3) is provided with circular oil flow holes (8), and the circular oil flow holes (8) are uniformly distributed on the probe protection cover (3).
4. The capacitance method-based oil-based mud water content measuring device of claim 1, wherein: two non-contact wire steel pipes are arranged inside the connecting steel pipe (2), and probe wires on the detection probes (4) are arranged in the two non-contact wire steel pipes respectively.
5. The oil-based mud water content measuring device based on the capacitance method as claimed in claim 1, wherein: and a grounding wire is arranged in the connecting steel pipe (2), and the connecting steel pipe (2) is connected with a power supply in the transmitter gauge outfit (1) through the grounding wire so as to be grounded.
6. The oil-based mud water content measuring device based on the capacitance method as claimed in claim 1, wherein: the two detection probes (4) are respectively a capacitance measurement module and a PT100 temperature measurement module, and the two detection probes (4) are made of nylon materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221590871.XU CN217846155U (en) | 2022-06-24 | 2022-06-24 | Oil-based mud water content measuring device based on capacitance method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221590871.XU CN217846155U (en) | 2022-06-24 | 2022-06-24 | Oil-based mud water content measuring device based on capacitance method |
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| CN217846155U true CN217846155U (en) | 2022-11-18 |
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| CN202221590871.XU Active CN217846155U (en) | 2022-06-24 | 2022-06-24 | Oil-based mud water content measuring device based on capacitance method |
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