CN116411928A - Lost circulation detection device and method - Google Patents

Abstract

The invention discloses a lost circulation detection device and a lost circulation detection method, which relate to the technical field of petroleum and natural gas drilling engineering, wherein the device comprises: the device comprises a lost circulation acoustic wave identification device, a coding circuit, a transcoding circuit, a transducer driving circuit and a transducer; the lost circulation acoustic wave identification device is used for capturing acoustic wave signals generated by lost circulation and generating electric signals carrying lost circulation information according to the acoustic wave signals; an encoding circuit for encoding the electrical signal; the transcoding circuit is used for transcoding the coded electric signal; the transducer driving circuit is used for driving the transducer according to the transcoded electric signal; and the transducer is used for converting the transcoded electric signal into an acoustic signal and transmitting the acoustic signal to the ground. The underground leakage is timely detected through the sound wave signals generated by the drilling hydraulic pressure difference during the well leakage identification, the well leakage position and the leakage degree can be further determined according to the sound wave signal characteristics, and the signal transmission is carried out through the sound wave transmission method, so that the instantaneity, the accuracy and the comprehensiveness of the well leakage detection technology are improved.

Description

Lost circulation detection device and method

technical field

The invention relates to the technical field of oil and natural gas drilling engineering, in particular to a well leakage detection device and method.

Background technique

This section is intended to provide a background or context to embodiments of the invention that are recited in the claims. The descriptions herein are not admitted to be prior art by inclusion in this section.

During the drilling process, lost circulation accidents occur frequently, and are characterized by suddenness and refractory nature, which may cause loss of drilling fluid and increase drilling operation time, or cause downhole complex accidents such as pipe sticking and wellbore collapse. Seriously restrict the safety of the drilling process and increase the cost of drilling. Therefore, it is of great significance to find lost circulation on the ground in time and accurately locate the lost circulation, and then take effective plugging measures to control lost circulation, which is of great significance to reduce economic losses and reduce the occurrence of complex downhole accidents.

At present, the method for judging whether lost circulation occurs mainly includes: judging lost circulation according to the volume of the mud pool, that is, monitoring the difference between the volume of mud entering the wellbore and the volume of mud returning upward in the annular space to determine whether lost circulation occurs. This kind of lost circulation detection method When the fluid loss such as seepage occurs is small, it is impossible to accurately judge whether lost circulation occurs. Another way to detect lost circulation is to comprehensively utilize mud logging technology for detection. This method mainly uses mud pulse mode for data transmission. This transmission mode has the disadvantages of low transmission rate, high bit error rate, and low anti-noise interference ability. Especially when a loss occurs, the drop in drilling fluid pressure will interfere with the transmission channel, increase the signal error rate or even interrupt the signal transmission, so the detection of lost circulation based on this method is not timely and accurate enough.

To sum up, the current lost circulation detection technology has poor real-time performance, poor lost circulation location detection accuracy, and cannot accurately display the severity of lost circulation.

Contents of the invention

The embodiment of the present invention also provides a lost circulation detection device to improve the real-time performance, accuracy and comprehensiveness of the lost circulation detection technology. The device includes:

Well leakage acoustic wave identification device, encoding circuit, transcoding circuit, transducer drive circuit, and transducer;

The lost circulation acoustic wave identification device is used to capture the sound wave signal generated by the lost circulation, and generate an electrical signal carrying the lost circulation information according to the sound wave signal;

an encoding circuit, configured to encode the electrical signal;

A transcoding circuit, configured to transcode the encoded electrical signal;

A transducer drive circuit, configured to drive the transducer according to the transcoded electrical signal;

The transducer is used to convert the transcoded electrical signal into an acoustic signal and transmit it to the ground through the drill string.

An embodiment of the present invention provides a lost circulation detection method, which is applied to the lost circulation detection device in the above-mentioned embodiments, and is used to improve the real-time performance, accuracy and comprehensiveness of the lost circulation detection technology. The method includes:

Capture the sound wave signal generated by lost circulation, and generate an electrical signal carrying lost circulation information according to the sound wave signal;

encoding the electrical signal;

Transcoding the encoded electrical signal;

driving a transducer according to the transcoded electrical signal;

The transcoded electrical signal is converted into an acoustic signal and transmitted to the ground through the drill string.

An embodiment of the present invention provides a lost circulation detection device, including a lost circulation acoustic wave identification device, an encoding circuit, a transcoding circuit, a transducer drive circuit, and a transducer; a lost circulation acoustic wave identification device for capturing lost circulation caused by The sound wave signal is used to generate an electrical signal carrying leakage information according to the sound wave signal; an encoding circuit is used to encode the electrical signal; a transcoding circuit is used to transcode the encoded electrical signal; The transducer drive circuit is used to drive the transducer according to the transcoded electrical signal; the transducer is used to convert the transcoded electrical signal into an acoustic signal and transmit it to the ground through the drill string. In this way, lost circulation is detected in time through the acoustic wave signal generated by the difference in drilling hydraulic pressure during lost circulation, and the acoustic signal is generated into an electrical signal carrying lost circulation information, and the electrical signal is converted into an acoustic signal and transmitted to the ground after encoding and transcoding. To improve the timeliness of lost circulation detection, the location and severity of lost circulation can be further determined through the spectrum characteristics of lost circulation acoustic signal, which improves the real-time performance, accuracy and comprehensiveness of lost circulation detection technology.

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 drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work. In the attached picture:

Fig. 1 is a schematic diagram of a lost circulation detection device provided in an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of an instrument protection cylinder provided in an embodiment of the present invention;

Fig. 3 is a schematic structural view of an instrument installation inner core provided in an embodiment of the present invention;

Fig. 4 is the sectional view of A-A in Fig. 3 in the embodiment of the present invention;

Fig. 5 is the sectional view of B-B in Fig. 3 in the embodiment of the present invention;

Fig. 6 is the sectional view of C-C in Fig. 3 in the embodiment of the present invention;

Figure 7 is a cross-sectional view of D-D in Figure 3 in an embodiment of the present invention;

Fig. 8 is a flowchart of a lost circulation detection method provided in an embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

The term "and/or" in this article only describes an association relationship, which means that there can be three kinds of relationships, for example, A and/or B can mean: there is A alone, A and B exist at the same time, and B exists alone. situation. In addition, the term "at least one" herein means any one of a variety or any combination of at least two of the more, for example, including at least one of A, B, and C, which may mean including from A, Any one or more elements selected from the set formed by B and C.

In the description of this specification, the words "comprising", "comprising", "having", "containing" and so on are all open terms, meaning including but not limited to. A description referring to the terms "one embodiment," "a particular embodiment," "some embodiments," "for example," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one of the present application. Examples or examples. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the described specific features, structures or characteristics may be combined in any suitable manner in any one or more embodiments or examples. The sequence of steps involved in each embodiment is used to schematically illustrate the implementation of the present application, and the sequence of steps therein is not limited and can be appropriately adjusted as required.

It has been found through research that in the process of drilling, lost circulation accidents occur frequently, and are characterized by suddenness and refractory management, which may cause loss of drilling fluid and increase drilling operation time, or cause downhole problems such as pipe sticking and wellbore collapse. The occurrence of complex accidents seriously restricts the safety of the drilling process and increases the cost of drilling. Therefore, it is of great significance to find lost circulation on the ground in time and accurately locate the lost circulation, and then take effective plugging measures to control lost circulation, which is of great significance to reduce economic losses and reduce the occurrence of complex downhole accidents. At present, the method of judging whether lost circulation occurs is mainly by monitoring the difference between the volume of mud entering the wellbore and the volume of mud returning upward in the annulus to determine whether lost circulation has occurred. This lost circulation detection method can be used when there is little fluid loss such as leakage. It is impossible to accurately judge whether lost circulation occurs. Another way to detect lost circulation is to comprehensively utilize mud logging technology for detection. This method mainly uses mud pulse mode for data transmission. This transmission mode has the disadvantages of low transmission rate, high bit error rate, and low anti-noise interference ability. Especially when a loss occurs, the drop in drilling fluid pressure will interfere with the transmission channel, increase the signal error rate or even interrupt the signal transmission, so the detection of lost circulation based on this method is not timely and accurate enough. To sum up, the current lost circulation detection technology has poor real-time performance, poor lost circulation location detection accuracy, and cannot accurately display the severity of lost circulation.

In view of the above research, an embodiment of the present invention provides a lost circulation detection device, including: a lost circulation acoustic wave identification device, an encoding circuit, a transcoding circuit, a transducer driving circuit, and a transducer;

The lost circulation acoustic wave identification device is used to capture the sound wave signal generated by the lost circulation, and generate an electrical signal carrying the lost circulation information according to the sound wave signal;

an encoding circuit, configured to encode the electrical signal;

A transcoding circuit, configured to transcode the encoded electrical signal;

A transducer drive circuit, configured to drive the transducer according to the transcoded electrical signal;

The transducer is used to convert the transcoded electrical signal into an acoustic signal and transmit it to the ground through the drill string.

The embodiment of the present invention detects the occurrence of lost circulation in time through the acoustic wave signal generated by the difference in drilling hydraulic pressure when the lost circulation occurs, and generates an electrical signal carrying the lost circulation information according to the acoustic signal, and converts the electrical signal into an acoustic signal and transmits it to the On the ground, the timeliness of lost circulation detection can be improved, and the location and severity of lost circulation can be further determined through acoustic signals, which improves the real-time performance, accuracy and comprehensiveness of lost circulation detection technology.

The above-mentioned lost circulation detection device will be described in detail below.

During lost circulation, the acoustic wave signal generated by the drilling fluid due to the fluid pressure difference, the spectral characteristics of the acoustic signal (intensity and frequency comprehensive characterization) are significantly different from the acoustic spectral characteristics generated by the downhole drill bit breaking rock and the drill string contacting the well wall. Therefore, The lost circulation acoustic identification device can capture the acoustic signal generated by the lost circulation by identifying the acoustic spectrum features of the lost circulation, and generate an electrical signal carrying the lost circulation information according to the acoustic signal, for example, through the acoustic spectrum identification comprehensively characterized by the intensity and frequency characteristics of the sound wave, The acoustic wave signal generated by the lost circulation is captured; and the electric signal carrying the acoustic spectrum characteristic of the lost circulation information is generated according to the acoustic signal.

Here, the lost circulation information includes at least one of the following: the location of the lost leakage determined in combination with the mud logging information, the severity of the lost circulation (for example, including: small lost circulation caused by seepage or fractures, serious lost circulation caused by drilling into a fault zone), and the lost circulation velocity .

Exemplarily, the lost circulation acoustic wave identification device collects acoustic wave signals from different sources in the wellbore; compares the spectral features comprehensively characterized according to the frequency and intensity of the sound waves with the preset lost circulation acoustic wave spectral features, and when the matching degree of the comparison result is greater than When the preset threshold is reached, it is identified as the lost circulation acoustic wave signal and the capture is completed, an electrical signal carrying the lost circulation information is generated according to the captured acoustic wave signal, and then the transcoding circuit transcodes the encoded electrical signal; the transducer drives The circuit drives the transducer according to the transcoded electrical signal; the transducer converts the transcoded electrical signal into an acoustic signal and transmits it to the ground through the drill string.

In this way, using the acoustic wave transmission technology to transmit the measured lost circulation information to the ground has the obvious advantages of fast transmission speed and strong anti-interference ability compared with the traditional mud pulse transmission technology.

In addition, when the transducer converts the transcoded electrical signal into an acoustic signal for transmission to the ground, for example, the transcoded electrical signal may be converted into an acoustic signal and then sent to the ground through the drill string through a relay device.

If the transmission distance is short, the transducer can also convert the transcoded electrical signal into an acoustic signal and send it directly to the ground through the drill string.

The structure of the lost circulation detection device of the embodiment of the present invention will be described in detail below.

As shown in Figure 1, it is a schematic diagram of a lost circulation detection device provided by an embodiment of the present invention, wherein 3 is a lost circulation acoustic wave identification device, 4 is an encoding circuit, 5 is a transcoding circuit, and 6 is a transducer drive circuit , 8 are transducers.

In addition, as shown in Figure 1, in one embodiment of the present invention, the lost circulation detection device also includes, for example: an instrument protection tube 1, an instrument installation inner core 2 arranged in the instrument protection tube 1; a lost circulation acoustic wave identification device 3, a code The circuit 4, the transcoding circuit 5, the transducer driving circuit 6 and the transducer 8 are installed on the mounting frame arranged on the surface of the instrument installation inner core.

In addition, the transducer can be, for example, a piezoelectric ceramic transducer, for example, tightly installed in two ring structures on a mounting frame provided on the surface of the instrument installation inner core.

In addition, the outside of the instrument protection cylinder can be, for example, a cylinder with equal diameters.

Specifically, from top to bottom, the inside of the instrument protection cylinder is the drilling tool connection buckle, the inner flow channel, the upper instrument installation inner core sealing surface, the instrument installation inner core axial support matching surface, the instrument installation inner core protection cylinder, and the lower instrument installation. The sealing surface of the inner core is installed; the drilling tool connection buckle is used to connect the upper drilling tool; the inner flow channel is used to provide a flow channel for the internal drilling fluid; the sealing surface of the upper instrument installation inner core is used for the upper sealing surface of the instrument installation inner core Cooperate to realize the upper seal; the axial support mating surface of the instrument installation core is used to cooperate with the instrument installation inner core axial support surface to achieve position fixation; the instrument installation inner core protection tube is used to protect the instrument installed on the surface of the instrument installation inner core; the lower part The sealing mating surface of the instrument installation inner core is used to cooperate with the lower sealing surface of the instrument installation inner core to realize the lower sealing.

Here, the inside of the instrument installation inner core may be, for example, a flow channel of equal diameter.

Specifically, the instrument installation inner core is, for example, from top to bottom, the upper sealing surface, the upper sealing installation groove, the axial support surface of the instrument installation inner core, the radial support surface of the instrument installation inner core, the transducer mounting frame, and the circuit installation groove , the installation frame of the leakage acoustic wave identification device, the lower sealing surface, the lower sealing installation groove, and the lower drilling tool connection buckle; the upper sealing surface is used to cooperate with the sealing surface of the instrument protection cylinder and realize the instrument through the sealing ring installed in the upper sealing installation groove. The sealing connection between the upper part of the installation inner core and the instrument protection cylinder; the axial support surface of the instrument installation inner core and the radial support surface of the instrument installation inner core respectively provide support for the instrument installation inner core in the axial and radial directions; the transducer is installed on the transducer on the installation frame of the energy device; the circuit installation slot is used to install the encoding circuit, transcoding circuit, and transducer drive circuit; the well leakage acoustic wave identification device is installed on the well leakage acoustic wave identification device mounting frame; the lower sealing surface is used for the instrument protection tube Cooperate and realize the sealing connection between the lower part of the instrument installation inner core and the instrument protection cylinder through the seal ring installed at the seal installation groove of the lower part; the lower drilling tool connecting buckle is used to connect the lower drilling tool.

In an embodiment of the present invention, the leakage detection device further includes, for example: a battery installed in a battery compartment provided on the surface of the instrument installation inner core.

The structure of the instrument protection cylinder and the instrument installation inner core of the lost circulation device according to the embodiment of the present invention will be further described in detail below by citing a preferred embodiment.

As shown in Figure 2, it is a schematic structural diagram of an instrument protection cylinder provided by the embodiment of the present invention. The interior of the instrument protection cylinder 1 is sequentially composed of a drilling tool connection buckle 101, an inner flow channel 102, and an upper instrument installation inner core for sealing fit. Surface 103, instrument installation inner core axial support mating surface 104, instrument installation inner core protection cylinder 105, lower instrument installation inner core sealing mating surface 106.

As shown in Figure 3, it is a schematic structural diagram of an instrument installation inner core provided by an embodiment of the present invention. The instrument installation inner core includes, for example: an upper sealing surface 201, a sealing installation groove 202, an axial support surface 203, and a radial support surface. Surface 204, lower sealing surface 211, instrument protection cylinder connection buckle 212, lower drilling tool connection buckle 213, inner flow channel 214 (214 and 102 refer to the same inner flow channel, when the instrument protection cylinder and the instrument installation inner core are combined together , the inner flow channel 214 is immediately below the inner flow channel 102 , that is, the inner flow channel 214 is equal in diameter to the inner flow channel 102 , and the fluid enters the inner flow channel 214 after flowing through the inner flow channel 102 .

Specifically, the drilling tool connection buckle 101 is used to connect the upper drilling tool; the upper sealing surface 201 is used to cooperate with the sealing mating surface 103 of the upper instrument installation inner core of the instrument protection cylinder 1, and the sealing ring installed in the upper sealing installation groove 202 Realize the sealed connection between the upper part of the instrument installation inner core 2 and the instrument protection cylinder 1; the instrument installation inner core axial support surface 203 and the instrument installation inner core radial support surface 204 respectively provide support for the instrument installation inner core 2 in the axial and radial directions The lower sealing surface is used for 212 to cooperate with the lower instrument installation inner core sealing surface 106 of the instrument protection cylinder 1, and the sealing ring installed at the lower sealing installation groove 202 is used to realize the sealing of the instrument installation inner core 2 bottom and the instrument protection cylinder 1 Connection; the lower drilling tool connection buckle 213 is used to connect the lower drilling tool.

In addition, the axial support surface 203 of the instrument installation inner core 2 is also used to cooperate with the axial support mating surface 104 of the instrument installation inner core to achieve position fixation; the instrument installation inner core protection tube 105 is used to protect the surface of the instrument installation inner core 2 instrument. The inner runners (102, 214) provide flow paths for the inner drilling fluid.

Here, the upper drilling tool and the lower drilling tool include, for example, drill rods and the like.

In addition, as shown in FIG. 2 , in an embodiment of the present invention, the instrument protection cylinder further includes: an instrument installation inner core connection buckle 107, an instrument installation inner core connection buckle 107, which is used to connect with the instrument protection cylinder of the instrument installation inner core 2 The buckle 212 cooperates to realize the screw connection between the instrument protection cylinder 1 and the instrument installation inner core 2.

In addition, as shown in Figure 3, the mounting frame for installing the inner core of the instrument includes, for example: a transducer mounting frame 205, a circuit mounting groove 207, a battery compartment 209, a battery compartment fixing frame 208 for fixing the battery compartment, and a well leakage acoustic wave identification device. Mounting frame 210 .

Wherein, the transducer mount 205 is for example provided with a mounting threaded hole 206 (as shown in FIG. 4 , which is a sectional view of A-A in FIG. 3 ), and the transducer 8 is mounted on the transducer mounting 205 through the mounting threaded hole 206. The circuit mounting groove 207 is used to install the coding circuit 4, the transcoding circuit 5, the transducer drive circuit 6 (as shown in Figure 5, it is the cross-sectional view of B-B in Figure 3); the battery pack 9 is installed in the circumferentially evenly distributed In the battery compartment 209, the battery compartment 209 is installed on the battery compartment fixed frame 210 by mounting threads (as shown in FIG. 6 , it is a sectional view of C-C in FIG. 3 ), so that the battery pack 9 is evenly stressed when the drill string rotates, Improve the stability of the battery pack 9 in the downhole; the leaky leakage acoustic wave identification device mounting frame 210 is provided with a well leakage acoustic wave identification device mounting hole 215 (as shown in Figure 7, which is a cross-sectional view of D-D in Figure 3), and the well leakage acoustic wave identification The device 3 is installed on the installation frame 210 of the leakage acoustic wave identification device through the installation hole 215 of the leakage acoustic wave identification device.

In an embodiment of the present invention, for example, four lost circulation acoustic wave identification devices can be evenly arranged in the circumferential direction, which can realize the comprehensive monitoring of the wellbore when the drill string is not rotating, that is, during the sliding drilling process. Leakage accidents can be re-inspected by lifting the drill string upwards, and the location of the leakage can be accurately identified.

In addition, the components of the lost circulation detection device in the embodiment of the present invention are highly concentrated in a short joint, and the length is short, which does not affect the coordination of the drilling tool during use, is convenient for installation, and has strong applicability. When lost circulation occurs during drilling, the drilling fluid The leakage from the annular space formed by the drill string and the wellbore enters the formation, and the fluid generates an acoustic signal under the action of the pressure difference, which has obvious spectral characteristics difference compared with the acoustic signal generated by the downhole drill bit breaking the rock and the drill string contacting the well wall. , the acoustic wave signal as a characteristic of lost circulation identification will be easily captured by the lost circulation acoustic wave identification device in the lost circulation detection device, which can realize the occurrence of lost circulation in the first time, and then take effective measures.

In another embodiment of the present invention, during the drilling process, no lost circulation occurs at the time of drilling, but when small leakage accidents such as permeability loss occur in the open-hole section within a period of time after the drilling, at this time, the lost circulation detection device has already Through the location of the leakage, combined with the change of the liquid volume in the ground mud pool, after the leakage is found, the drill string is slowly lifted upwards so that the lost circulation detection device passes through the drilled open hole section from bottom to top, and the lost circulation reinspection is carried out. In this way, the leak location and severity can be accurately located. Alternatively, by distributing and installing multiple detection devices at different positions in the drill string, it is also possible to accurately locate the location and severity of the leakage.

An embodiment of the present invention also provides a lost circulation detection method, as described in the following embodiments. Since the problem-solving principle of this method is similar to that of the lost circulation detection device, the implementation of this method can refer to the implementation of the lost circulation detection device, and the repetition will not be repeated.

As shown in Figure 8, it is a flowchart of a lost circulation detection method provided by an embodiment of the present invention, including:

S801: The lost circulation acoustic wave identification device captures the sound wave signal generated by the lost circulation, and generates an electrical signal carrying the lost circulation information according to the sound wave signal;

S802: The encoding circuit encodes the electrical signal;

S803: The transcoding circuit transcodes the encoded electrical signal;

S804: The transducer drive circuit drives the transducer according to the transcoded electrical signal;

S805: The transducer converts the transcoded electrical signal into an acoustic wave signal and transmits it to the ground through the drill string.

In a possible implementation, capturing the sound wave signal generated by the lost circulation, and generating an electrical signal carrying the lost circulation information according to the sound wave signal includes: the sound wave spectrum identification of the lost circulation sound wave identification device comprehensively characterized by sound wave intensity and frequency characteristics , capture the sound wave signal generated by lost circulation; generate an electrical signal carrying sound wave spectrum characteristics of lost circulation information according to the sound wave signal.

In a possible implementation manner, the lost circulation information includes: the lost location, the severity of the lost, and the lost speed determined in combination with the mud logging information.

In an embodiment of the present invention, a lost circulation detection device is provided, including a lost circulation acoustic wave identification device, an encoding circuit, a transcoding circuit, a transducer drive circuit, and a transducer; a lost circulation acoustic wave identification device is used to capture lost circulation The generated acoustic wave signal is used to generate an electrical signal carrying leakage information according to the acoustic wave signal; an encoding circuit is used to encode the electrical signal; a transcoding circuit is used to transcode the encoded electrical signal; The transducer drive circuit is used to drive the transducer according to the transcoded electrical signal; the transducer is used to convert the transcoded electrical signal into an acoustic signal and transmit it to the ground through the drill string. In this way, lost circulation is detected in time through the acoustic wave signal generated by the difference in drilling hydraulic pressure during lost circulation, and the acoustic signal is generated into an electrical signal carrying lost circulation information, and the electrical signal is converted into an acoustic signal and transmitted to the ground after encoding and transcoding. To improve the timeliness of lost circulation detection, the location and severity of lost circulation can be further determined through the spectrum characteristics of lost circulation acoustic signal, which improves the real-time performance, accuracy and comprehensiveness of lost circulation detection technology.

Those skilled in the art should understand that the embodiments of the present invention may be provided as methods, systems, or computer program products. Accordingly, the present invention can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the scope of the present invention. Protection scope, within the spirit and principles of the present invention, any modification, equivalent replacement, improvement, etc., shall be included in the protection scope of the present invention.

Claims (14)

1. A lost circulation detection device, characterized in that it comprises: a lost circulation acoustic wave identification device, an encoding circuit, a transcoding circuit, a transducer drive circuit, and a transducer; The lost circulation acoustic wave identification device is used to capture the sound wave signal generated by the lost circulation, and generate an electrical signal carrying the lost circulation information according to the sound wave signal; an encoding circuit, configured to encode the electrical signal; A transcoding circuit, configured to transcode the encoded electrical signal; A transducer drive circuit, configured to drive the transducer according to the transcoded electrical signal; The transducer is used to convert the transcoded electrical signal into an acoustic signal and transmit it to the ground through the drill string. 2. The lost circulation detection device according to claim 1, characterized in that the lost circulation detection device further comprises: an instrument protection cylinder, an instrument installation inner core arranged in the instrument protection cylinder; The well leakage acoustic wave identification device, coding circuit, transcoding circuit, transducer driving circuit and transducer are installed on the installation frame arranged on the surface of the instrument installation inner core. 3. The lost circulation detection device according to claim 2, wherein the transducer is a piezoelectric ceramic transducer. 4. The lost circulation detection device according to claim 2, characterized in that the lost circulation detection device further comprises: a battery installed in a battery compartment arranged on the surface of the instrument installation inner core. 5. The lost circulation detection device according to claim 2, characterized in that, the outside of the instrument protection cylinder is a cylinder of equal diameter. 6. The lost circulation detection device as claimed in claim 2, characterized in that, from top to bottom inside the instrument protection cylinder, there are drilling tool connection buckle, inner flow channel, upper instrument installation inner core sealing mating surface, instrument installation inner core Axial support mating surface, instrument installation inner core protection cylinder, lower instrument installation inner core sealing mating surface; The drilling tool connection button is used to connect the upper drilling tool; the inner flow channel is used to provide a flow channel for the internal drilling fluid; the sealing surface of the upper instrument installation inner core is used to cooperate with the upper sealing surface of the instrument installation inner core to achieve upper sealing; the instrument installation The axial supporting surface of the inner core is used to cooperate with the axial supporting surface of the instrument installation inner core to achieve position fixation; the instrument installation inner core protection cylinder is used to protect the instrument installed on the surface of the instrument installation inner core; the lower instrument installation inner core sealing surface It is used to cooperate with the lower sealing surface of the inner core of the instrument to realize the lower sealing. 7. The lost circulation detection device according to claim 2, characterized in that the inside of the instrument installation core is a flow channel with equal diameters. 8. The lost circulation detection device according to claim 2, characterized in that, from top to bottom, the instrument installation inner core is the upper sealing surface, the upper sealing installation groove, the axial support surface of the instrument installation inner core, and the instrument installation inner core. Radial support surface, transducer mounting frame, circuit mounting groove, well leakage acoustic wave identification device mounting frame, lower sealing surface, lower sealing mounting groove, and lower drilling tool connecting buckle; The upper sealing surface is used to cooperate with the sealing surface of the instrument protection cylinder and realize the sealing connection between the upper part of the instrument installation inner core and the instrument protection cylinder through the sealing ring installed in the upper sealing installation groove; The axial support surface of the instrument installation inner core and the radial support surface of the instrument installation inner core provide support for the instrument installation inner core in the axial and radial directions respectively; The transducer is installed on the transducer mounting frame; The circuit installation slot is used to install the coding circuit, the transcoding circuit, and the transducer drive circuit; The lost circulation acoustic wave identification device is installed on the well leakage acoustic wave identification device mounting frame; The lower sealing surface is used to cooperate with the instrument protection cylinder and realize the sealing connection between the lower part of the instrument installation inner core and the instrument protection cylinder through the seal ring installed at the lower sealing installation groove; The lower drilling tool connection buckle is used to connect the lower drilling tool. 9. The lost circulation detection device as claimed in claim 1, characterized in that the lost circulation acoustic wave recognition device is specifically used to identify the sound wave spectrum through the comprehensive characterization of sound wave intensity and frequency characteristics, and capture the sound wave signal produced by the lost circulation; The above-mentioned acoustic wave signal generates an electrical signal carrying the characteristics of the acoustic wave spectrum of the lost circulation information. 10. The lost circulation detection device according to claim 1, wherein the lost circulation information includes: the lost location, the severity of the lost, and the lost speed determined in combination with the mud logging information. 11. The lost circulation detection device according to claim 1, wherein the transducer is specifically used to convert the transcoded electrical signal into an acoustic signal and send it to the ground through the drill string through the relay device. 12. A lost circulation detection method, characterized in that it is applied to the lost circulation detection device according to any one of claims 1-11, comprising: The lost circulation acoustic wave identification device captures the sound wave signal generated by the lost circulation, and generates an electrical signal carrying the lost circulation information according to the sound wave signal; an encoding circuit encodes the electrical signal; The transcoding circuit transcodes the encoded electrical signal; The transducer drive circuit drives the transducer according to the transcoded electrical signal; The transducer converts the transcoded electrical signal into an acoustic signal and transmits it to the ground through the drill string. 13. The lost circulation detection method according to claim 12, wherein the lost circulation acoustic wave recognition device captures the sound wave signal generated by the lost circulation, and generates an electrical signal carrying lost circulation information according to the sound wave signal, comprising: The lost circulation acoustic wave recognition device captures the sound wave signal generated by the lost circulation through the sound wave spectrum identification comprehensively characterized by the sound wave intensity and frequency characteristics; generates an electrical signal carrying the sound wave spectrum characteristic of the lost circulation information according to the sound wave signal. 14. The lost circulation detection method according to claim 12, wherein the lost circulation information includes: the lost location, the severity of the lost, and the lost speed determined in combination with the mud logging information.

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