CN203239331U - Probe measuring high viscosity mixing fluid characteristics - Google Patents

Abstract

The utility model provides a probe for measuring the properties of a high-viscosity mixed fluid. The probe for measuring the properties of a high-viscosity mixed fluid is composed of an outer electrode, an inner electrode, and an insulating material between the outer electrode and the inner electrode. The electrode is in the shape of a tube, the inner electrode is cylindrical, the outer electrode and the inner electrode are on the same axis, and both the outer electrode and the inner electrode are hard metal materials; one end of the outer electrode and One end of the internal electrode is on the same plane or on the same curved surface, and this end is a measuring end face for measuring the dielectric constant of the measured medium flowing through the measuring end face. The probe can measure the dielectric constant of the medium. It has small volume, high measurement accuracy, and is not affected by the medium composition, composition ratio and viscosity. It can work in the drilling operation under the conditions of high temperature, high pressure and high frequency and high intensity vibration. It can measure the change of drilling fluid composition near the drill bit in the wellbore in real time, which provides a favorable opportunity for preventing and dealing with downhole accidents.

Description

A Probe for Measuring Properties of High Viscosity Mixed Fluid

technical field

The utility model relates to the field of single-phase or multi-phase fluid property measurement in pipelines in the oil drilling process, in particular to a high-viscosity mixed fluid property measurement probe. the

Background technique

In the process of drilling, complex working conditions such as overflow and gas kick often occur. If they cannot be detected and controlled in time at an early stage, the accident may be further aggravated, resulting in malignant drilling accidents such as well kick or blowout, and even well destruction. fatal accident. Overflow and gas invasion are the entry of formation fluid into the wellbore. Since the dielectric constant of the drilling fluid in the formation fluid and the wellbore is different, when overflow and gas invasion occur, the dielectric constant of the drilling fluid in the wellbore will inevitably change. Therefore, as long as the real-time measurement The change of the dielectric constant in the wellbore can be used to know whether there is overflow and gas invasion in time. the

The dielectric property is the intrinsic property of the dielectric. When the electric field is applied, the dielectric will generate induced charges and weaken the electric field. The ratio of the original applied electric field (in vacuum) to the electric field in the final medium is the dielectric constant, also known as the dielectric constant. Generally, different substances have different dielectric constants. If there is a large difference in the dielectric constant between a certain dielectric and the impurities mixed into it, it can be judged whether it is mixed with impurities by measuring the change in the dielectric constant of the medium. the

Such as the use of dielectric constant to measure the water content of crude oil, the use of lubricating oil, the quality of oil production, etc. the

At present, the commonly used sensors for measuring dielectric constant are parallel plate electrode type and coaxial cable type.

Drilling operations have their particularities in industrial engineering, so there are certain special requirements for the measuring instruments used, mainly as follows: 

(1) The size of the wellbore and drilling tools is limited, which requires that the volume of the measurement-while-drilling instrument used should not be too large;

(2) The underground environment is harsh, and the probes used should be able to be used in high temperature and high pressure environments;

(3) The drilling tool is always under high-frequency and high-strength impact, and the measuring element is required to have a certain impact resistance;

(4) The drilling fluid has high viscosity and contains certain cuttings, so the measuring probe is required to have anti-clogging ability;

(5) The drilling fluid has a high flow rate and contains solid particles, so the measuring probe is required to have wear resistance;

In the prior art, there is a high-sensitivity liquid dielectric constant measuring probe, which adopts a coaxial, open, and retractable structure, which cannot meet the requirements of the last three items above. There is also a system and method in the prior art for measuring the properties of a liquid in a multiphase mixture using two open-ended coaxial probes with different sensitivity depths, which uses a rotating element to generate an annular flow of the multiphase flow, and then uses Two kinds of probes with different lengths are used to measure the dielectric constant of the device, but they cannot fully meet (for example, (2)-(5)) the complex condition requirements of the above-mentioned downhole measurement. the

To sum up, all dielectric constant measuring probes currently on the market cannot be used for real-time measurement while drilling under complex conditions during drilling. the

Utility model content

The embodiment of the utility model provides a probe for measuring the properties of a high-viscosity mixed fluid, which is used for real-time measurement while drilling under complex conditions in the drilling process. the

In order to achieve the above-mentioned technical purpose, the embodiment of the utility model provides a high-viscosity mixed fluid characteristic measurement probe, the high-viscosity mixed fluid characteristic measurement probe is composed of an outer electrode, an inner electrode, and a connection between the outer electrode and the inner electrode. The outer electrode is in the shape of a round tube, the inner electrode is in the shape of a cylinder, the outer electrode and the inner electrode have the same axis, and the outer electrode and the inner electrode are hard One end of the outer electrode and one end of the inner electrode are on the same plane or on the same curved surface, and this end is a measuring end face for measuring the dielectric constant of the measured medium flowing through the measuring end face. the

Optionally, in an embodiment of the present utility model, the measuring end face is a measuring end face without insulation treatment. the

Optionally, in an embodiment of the present utility model, the radius of one end of the measuring end surface of the inner electrode is greater than or equal to the thickness of the smallest part of the outer electrode. the

Optionally, in an embodiment of the present utility model, the radius of the non-measuring end surface of the internal electrode is smaller than the radius of one end of the measuring end surface of the internal electrode. the

Optionally, in an embodiment of the present invention, the insulating material has a lower dielectric constant than the measured medium. the

Optionally, in an embodiment of the present utility model, the radius of the non-measurement end surface of the external electrode is greater than the radius of one end of the measurement end surface of the external electrode. the

Optionally, in an embodiment of the present utility model, the radius of the non-measurement end surface of the external electrode is smaller than the radius of one end of the measurement end surface of the external electrode. the

Optionally, in an embodiment of the present utility model, the external electrode is a measuring sub body. the

The above technical solution has the following beneficial effects: because the high-viscosity mixed fluid characteristic measurement probe is composed of an outer electrode, an inner electrode, and an insulating material between the outer electrode and the inner electrode, wherein the outer electrode is in the form of circular tube, the inner electrode is cylindrical, the outer electrode and the inner electrode have the same axis, and both the outer electrode and the inner electrode are hard metal materials; one end of the outer electrode and the One end of the inner electrode is on the same plane or on the same curved surface, and this end is the measuring end face, which is used to measure the dielectric constant of the measured medium flowing through the measuring end face, so the following technical effects are achieved: high viscosity and more The phase fluid characteristic measurement probe can measure the dielectric constant of the medium. It has small volume, high measurement accuracy, and is not affected by the medium composition, composition ratio and viscosity. It can work under the conditions of high temperature, high pressure and high frequency and high intensity vibration. Applied in drilling operations, it can measure the change of drilling fluid composition in the wellbore near the drill bit in real time, and find the formation fluid entering the wellbore in time, which provides a favorable opportunity for preventing and dealing with downhole accidents. the

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work. the

Fig. 1 is a schematic structural diagram of a probe for measuring the properties of a high-viscosity mixed fluid according to an embodiment of the present invention;

Fig. 2 is the utility model application example and is applicable to the probe structural representation of external installation;

Fig. 3 is a schematic diagram of the installation method of the probe suitable for external installation in the measuring pup joint of the application example of the present utility model;

Fig. 4 is the utility model application example and is applicable to the probe structure diagram of internal installation;

Fig. 5 is a schematic diagram of the installation method of the probe suitable for internal installation in the measuring pup joint of the application example of the present utility model;

Fig. 6 is a schematic diagram of the probe design of the utility model application example measuring the sub body as the outer electrode;

Fig. 7 is the measurement schematic diagram of the utility model application example measuring probe in the shaft;

Fig. 8 is a schematic diagram of the air intrusion test data of the measuring probe in the application example of the present invention. the

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model. the

In order to prevent major accidents such as drilling kicks and blowouts, real-time measurement of the dielectric constant of the annular fluid near the drill bit downhole can detect formation fluids (oil, gas, water) entering the wellbore in time, thereby gaining valuable time for the further development of accident control , as shown in Figure 1, is a schematic structural diagram of a high-viscosity mixed fluid characteristic measurement probe according to an embodiment of the present invention, the high-viscosity mixed fluid characteristic measurement probe consists of an outer electrode 1, an inner electrode 2, and the outer electrode and the The insulating material 3 between the inner electrodes is formed, wherein, the outer electrode 1 is in the shape of a circular tube, the inner electrode 2 is in the shape of a cylinder, the outer electrode 1 and the inner electrode 2 have the same axis, and the outer electrode 1 is in the shape of a cylinder. Both the electrode 1 and the internal electrode 2 are hard metal materials; one end of the external electrode 1 and one end of the internal electrode 2 are on the same plane or on the same curved surface, and this end is a measuring end face 4 for measuring from the Measure the dielectric constant of the measured medium flowing through the end face 4 . the

Optionally, the measured medium is a single-phase or multi-phase mixture. Optionally, the measuring end face 4 is a measuring end face without insulation treatment. Optionally, the insulating material 3 has a lower dielectric constant than the measured medium. the

Optionally, the radius of one end of the measuring end surface of the inner electrode 2 is greater than or equal to the thickness of the smallest part of the outer electrode, so as to be suitable for a bottomhole high pressure environment. In order to increase the measurement sensitivity of the probe, the inner electrode 2 can be designed to measure the thickness at one end of the end face whose radius is greater than the minimum point of the outer electrode, as shown in FIG. 1 . the

Optionally, the radius of the non-measuring end surface of the internal electrode 2 is smaller than the radius of one end of the measuring end surface of the internal electrode 2, so as to improve measurement sensitivity. In order to reduce the overall volume of the probe and improve the measurement sensitivity, the inner electrode 2 can be designed so that the non-measurement end has a smaller radius. the

The shape design of the external electrode 1 generally considers actual installation requirements. This probe can be installed externally or internally when in use, and it can be fixed by card or thread, which is easy to replace. the

Optionally, the radius of the non-measurement end surface of the external electrode is greater than the radius of one end of the measurement end surface of the external electrode, so as to be suitable for external installation. As shown in Figure 2, it is a schematic diagram of the structure of the probe suitable for external installation in the application example of the present utility model; as shown in Figure 3, it is a schematic diagram of the installation method of the probe suitable for external installation in the measurement sub-section of the application example of the present utility model. the

Optionally, the radius of the non-measuring end surface of the external electrode is smaller than the radius of one end of the measuring end surface of the external electrode, so as to be suitable for internal installation. As shown in Figure 4, it is a schematic diagram of the structure of the probe suitable for internal installation in the application example of the present utility model; as shown in Figure 5, it is a schematic diagram of the installation method of the probe suitable for internal installation in the measurement sub-section of the application example of the present utility model. the

Optionally, the external electrode may be a measuring sub body. As shown in Figure 6, it is a schematic diagram of the design of the probe with the measuring sub body as the external electrode in the application example of the utility model, where 1 indicates the design of the measuring sub body as the external electrode. the

As shown in FIG. 7 , it is a schematic diagram of the measurement probe in the wellbore of the application example of the present invention, which includes: a measurement nipple 71 , a well wall 72 , a measurement probe 73 , and drilling fluid 74 . As shown in Figure 8, it is a schematic diagram of the gas intrusion test data of the measuring probe of the application example of the present utility model. It can be seen that the high-viscosity mixed fluid characteristic measuring probe of the above-mentioned application example of the present utility model is composed of unequal-diameter inner electrodes, outer electrodes and low dielectric Constant insulating material composition. During the drilling process, the dielectric and electrical properties of the bottom drilling fluid can be measured in real time, as well as other parameters obtained indirectly from these parameters. It can be used in the environment of high temperature, high pressure and high frequency vibration, which is helpful for timely detection of overflow, gas intrusion and other accidents. the

The above technical solution of the embodiment of the utility model has the following beneficial effects: because the measurement probe for the characteristic of the high-viscosity mixed fluid is composed of an outer electrode, an inner electrode, and an insulating material between the outer electrode and the inner electrode, wherein, The outer electrode is in the shape of a circular tube, the inner electrode is in the shape of a cylinder, the outer electrode and the inner electrode are on the same axis, and both the outer electrode and the inner electrode are hard metal materials; the outer electrode One end of the inner electrode and one end of the internal electrode are on the same plane or on the same curved surface, and this end is a measuring end face, which is a technical means for measuring the dielectric constant of the measured medium flowing through the measuring end face, so the following technology is achieved Effect: The high-viscosity multiphase fluid characteristic measuring probe can measure the dielectric constant of the medium, which has small volume, high measurement accuracy, and is not affected by the medium composition, composition ratio and viscosity. It can work under the conditions of high temperature, high pressure and high frequency and high intensity vibration. Applied in drilling operations, it can measure the change of drilling fluid composition in the wellbore near the drill bit in real time, and find the formation fluid entering the wellbore in time, which provides a favorable opportunity for preventing and dealing with downhole accidents. the

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present utility model in detail. Within the protection scope of the utility model, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model. the

Claims (8)

1. high viscosity fluid-mixing characteristic measuring probe, it is characterized in that, described high viscosity fluid-mixing characteristic measuring probe is made of the insulation materials between external electrode, interior electrode and described external electrode and the described interior electrode, wherein, described external electrode is cylindrical, described interior electrode is cylindric, and described external electrode is identical axle center with described interior electrode, and described external electrode and described interior electrode are hard metal material; One end of described external electrode and an end of described interior electrode are on same plane or same curved surface, and this end is for measuring end face, are used for measuring the dielectric constant of the measured medium of crossing from this measuring junction surface current.

2. high viscosity fluid-mixing characteristic measuring probe as claimed in claim 1 is characterized in that, the measurement end face that described measurement end face is processed for not doing insulation.

3. high viscosity fluid-mixing characteristic measuring probe as claimed in claim 1 is characterized in that, the measurement end face one end radius of described interior electrode is more than or equal to the thickness at the minimum place of described external electrode.

4. high viscosity fluid-mixing characteristic measuring probe as claimed in claim 1 is characterized in that, the non-measuring junction radius surface of described interior electrode is less than the measurement end face one end radius of electrode in this.

5. high viscosity fluid-mixing characteristic measuring probe as claimed in claim 1 is characterized in that, described insulation materials is lower than the dielectric constant of measured medium.

6. high viscosity fluid-mixing characteristic measuring probe as claimed in claim 1 is characterized in that, the radius of the non-measurement end face of described external electrode is greater than the radius of measurement end face one end of this external electrode.

7. high viscosity fluid-mixing characteristic measuring probe as claimed in claim 1 is characterized in that, the radius of the non-measurement end face of described external electrode is less than the radius of measurement end face one end of this external electrode.

8. high viscosity fluid-mixing characteristic measuring probe as claimed in claim 1 is characterized in that, described dispatch from foreign news agency is very measured the pipe nipple body.

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