Underground engineering parameter real-time measurement system

Abstract

The utility model discloses an underground engineering parameter real-time measurement system, which comprises an engineering parameter measurement device arranged underground; one end of the pulse signal generating device is electrically connected with the engineering parameter measuring device to obtain the original engineering parameters and convert the original engineering parameters into pulse signals, and the other end of the pulse signal generating device is connected with the bottom end of the drill column to transmit the pulse signals to drilling fluid in the drill column for signal transmission; the pulse signal acquisition device is connected with a vertical pressure sensor arranged at the top end of the drill stem so as to acquire a pulse signal; and the decoding device is connected with the pulse signal acquisition device and is used for decoding the pulse signals into underground engineering parameters. The system can collect underground engineering parameters in real time and transmit the underground engineering parameters to the ground while drilling, so that an on-site driller or engineer monitors changes of the underground engineering parameters in real time, adjusts drilling parameters in real time according to the changes of the underground parameters, timely and accurately pre-judges whether faults occur or not, and timely takes corresponding measures, so that the drilling time efficiency can be improved, and the drilling efficiency is improved. The drilling risk is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of drilling engineering equipment more particularly, relate to a downhole engineering parameter real -time measurement system. BACKGROUND

[0002] In the drilling field, the engineering parameter at the place close to the drill bit is an important factor influencing the safety and speed of drilling. In the prior art, to obtain the relevant engineering parameter in real time, it is generally carried out on the ground. However, with the development of ultra-deep well and large displacement horizontal well technologies, the engineering parameters such as drilling pressure, torque and rotating speed measured on the ground can no longer reflect the real working conditions downhole, which requires the use of downhole engineering parameter measurement system to obtain the relevant engineering parameters downhole.

[0003] In order to obtain the engineering parameters that can reflect the real working conditions downhole, the downhole engineering parameter measurement system is needed. However, the existing downhole engineering parameter measurement system is a storage system, which can collect and store various types of engineering parameters such as drilling pressure, torque and vibration downhole, but cannot realize real-time transmission while drilling. Instead, after a period of time (e.g. about a week), the downhole engineering parameter measurement system is taken out to the area outside the well and the data inside is exported for relevant analysis. It can be seen that this is a post-analysis. During the measurement period downhole, if some abnormal situations occur, the relevant personnel cannot know, which leads to the inability to realize real-time early warning of drilling risks and dynamic optimization of drilling parameters, as important real-time parameters are lacking as a basis. UTILITY MODEL CONTENT

[0004] To solve the above technical problems, the utility model provides a downhole engineering parameter real-time measurement system, which can collect and transmit the downhole engineering parameters to the ground while drilling, so that the on-site driller or engineer can monitor the changes of the downhole engineering parameters in real time, adjust the drilling parameters in real time according to the changes of the downhole parameters, and thus timely and accurately predict whether complex downhole failures such as well kick, well leakage, sticking and drill tool damage occur, and take appropriate measures in time to avoid more serious accidents, which can reduce the non-drilling time, improve the timeliness of drilling and reduce the drilling risk.

[0005] The utility model provides a downhole engineering parameter real-time measurement system, which comprises:

[0006] The engineering parameter measurement device is arranged downhole.

[0007] The pulse signal generating device is electrically connected to the engineering parameter measurement device at one end to obtain the original engineering parameters and convert them into pulse signals, and is connected to the bottom end of the drill string at the other end to transmit the pulse signals to the drilling fluid in the drill string for signal transmission.

[0008] The pulse signal acquisition device is connected with the stand pressure sensor arranged at the top end of the drill string to acquire the pulse signal transmitted by the drilling fluid;

[0009] The decoding device is connected with the pulse signal acquisition device and is used for decoding the pulse signal into the downhole engineering parameter.

[0010] Preferably, in the downhole engineering parameter real-time measurement system, the engineering parameter measurement device comprises:

[0011] The main control component;

[0012] The drill pressure sensing component is electrically connected with the main control component and is used for transmitting the acquired drill pressure data to the main control component.

[0013] Preferably, in the downhole engineering parameter real-time measurement system, the drill pressure sensing component comprises:

[0014] The drill pressure strain gauge combination unit is attached to the outer side of the engineering parameter measurement device;

[0015] The drill pressure strain gauge combination unit has a first ground terminal and a first voltage access terminal, a first positive differential voltage output terminal and a first negative differential voltage output terminal which are electrically connected with the main control component;

[0016] The main control component is used for calculating the drill pressure according to the first positive differential voltage and the first negative differential voltage.

[0017] Preferably, in the downhole engineering parameter real-time measurement system, the drill pressure strain gauge combination unit comprises:

[0018] Four drill pressure main strain gauges are arranged at a first circular area of the outer side of the engineering parameter measurement device at equal angles;

[0019] Four drill pressure mirror surface strain gauges are arranged at a second circular area of the outer side of the engineering parameter measurement device in mirror surface symmetry with the four drill pressure main strain gauges, and the second circular area is located at a position on the engineering parameter measurement device which is opposite to the first circular area;

[0020] The first drill pressure main strain gauge and the third drill pressure main strain gauge are connected in series between the first voltage access terminal and the first positive differential voltage output terminal, the second drill pressure main strain gauge and the fourth drill pressure main strain gauge are connected in series between the first ground terminal and the first positive differential voltage output terminal, the first drill pressure mirror surface strain gauge and the third drill pressure mirror surface strain gauge are connected in series between the first ground terminal and the first negative differential voltage output terminal, and the second drill pressure mirror surface strain gauge and the fourth drill pressure mirror surface strain gauge are connected in series between the first voltage access terminal and the first negative differential voltage output terminal.

[0021] Preferably, in the above downhole engineering parameter real-time measurement system, the engineering parameter measurement device further comprises:

[0022] A torque sensing component, electrically connected with the master control component, for transmitting the acquired torque data to the master control component.

[0023] Preferably, in the above downhole engineering parameter real-time measurement system, the torque sensing component comprises:

[0024] A torque strain gauge combination unit attached to the outer side of the engineering parameter measurement device;

[0025] The torque strain gauge combination unit has a second ground terminal, a second voltage input terminal, a second positive differential voltage output terminal and a second negative differential voltage output terminal, all of which are electrically connected with the master control component;

[0026] The master control component is used to calculate the torque according to the second positive differential voltage and the second negative differential voltage.

[0027] Preferably, in the above downhole engineering parameter real-time measurement system, the torque strain gauge combination unit comprises:

[0028] 4 torque main strain gauges arranged at equal angles in the first circular area of the outer side of the engineering parameter measurement device, each of the torque main strain gauges being spaced apart from the adjacent weight-on-bit main strain gauge by an angle of 45°;

[0029] 4 torque mirror strain gauges arranged in mirror symmetry with the 4 torque main strain gauges in the second circular area of the outer side of the engineering parameter measurement device;

[0030] Among them, the first torque main strain gauge and the third torque main strain gauge are connected in series between the second voltage input terminal and the second positive differential voltage output terminal, the second torque main strain gauge and the fourth torque main strain gauge are connected in series between the second ground terminal and the second positive differential voltage output terminal, the first torque mirror strain gauge and the third torque mirror strain gauge are connected in series between the second ground terminal and the second negative differential voltage output terminal, and the second torque mirror strain gauge and the fourth torque mirror strain gauge are connected in series between the second voltage input terminal and the second negative differential voltage output terminal.

[0031] Preferably, in the above downhole engineering parameter real-time measurement system, the engineering parameter measurement device further comprises an inner temperature and inner pressure sensor and / or an outer temperature and outer pressure sensor and / or a vibration and impact rotational speed sensor and / or a three-axis acceleration sensor connected with the master control component;

[0032] The engineering parameter measuring device further comprises a data storage component connected with the main control component and having a data transmission interface.

[0033] Preferably, in the downhole engineering parameter real-time measuring system, a storage device connected with the decoding device is further included.

[0034] The storage device is further connected to a display device and a data center.

[0035] Preferably, in the downhole engineering parameter real-time measuring system, the pulse signal generating device is arranged in a drilling transmission device, and the drilling transmission device further comprises a battery and a directional probe connected with the pulse signal generating device in sequence.

[0036] The directional probe is connected with the engineering parameter measuring device by means of a telescopic rod.

[0037] As can be seen from the above technical solution, the downhole engineering parameter real-time measuring system comprises an engineering parameter measuring device arranged downhole, a pulse signal generating device electrically connected with the engineering parameter measuring device at one end to obtain original engineering parameters and convert them into pulse signals, and connected with the bottom end of a drill string at the other end to transmit the pulse signals to drilling fluid in the drill string for signal transmission, a pulse signal collecting device connected with a standpipe pressure sensor arranged at the top end of the drill string to obtain the pulse signals transmitted by the drilling fluid, and a decoding device connected with the pulse signal collecting device to decode the pulse signals into downhole engineering parameters. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of the provided drawings.

[0039] Figure 1 FIG. 1 is a schematic diagram of an embodiment of the downhole engineering parameter real-time measuring system provided by the present application.

[0040] Figure 2 An internal structure diagram of the engineering parameter measuring device;

[0041] Figure 3 An engineering parameter measuring device schematic diagram of the strain gauge pasted on the engineering parameter measuring device;

[0042] Figure 4 A strain gauge electrical connection schematic diagram;

[0043] Figure 5 An internal structure diagram of the engineering parameter measuring device provided by the application. DETAILED DESCRIPTION

[0044] The core of the utility model is to provide a downhole engineering parameter real-time measurement system, can gather and transmit downhole engineering parameter with drilling to ground in real time, let the scene driller or engineer real-time monitoring downhole engineering parameter change, according to the change of downhole parameter real-time adjustment drilling parameter, so timely and accurately predict whether to appear well gushing, well leakage, sticking, drilling tool damage and other downhole complex fault, and take corresponding measures in time to avoid more serious accident, this can reduce non-drilling time, improve the timeliness of drilling, reduce the risk of drilling.

[0045] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0046] The utility model provides a downhole engineering parameter real-time measurement system's embodiment such as one kind as Figure 1 As shown in the figure, Figure 1 It is the schematic diagram of the embodiment of the downhole engineering parameter real-time measurement system provided by the utility model, and the system includes the relevant part of downhole part and the relevant part of ground part, can include:

[0047] Engineering parameter measuring device 1, setting in downhole, can set multiple sensor modules on it according to actual needs to obtain multiple parameters in downhole, for example, drilling pressure, torque, rotating speed, internal and external temperature, internal and external pressure, vibration and the like, so that a engineering parameter measuring device 1 can utilize these different sensors to concentrate and obtain multiple engineering parameters, and can realize real-time transmission from downhole to ground;

[0048] The pulse signal generating device 2 is electrically connected with the engineering parameter measuring device 1 at one end to obtain original engineering parameters and convert the original engineering parameters into pulse signals, and is connected with the bottom end of the drill string 3 at the other end to transmit the pulse signals to the drilling fluid 31 in the drill string 3 for signal transmission.

[0049] The pulse signal collecting device 4 is connected with the standpipe pressure sensor 32 arranged at the top end of the drill string 3 to obtain the pulse signals transmitted by the drilling fluid 31.

[0050] The decoding device 5 is connected with the pulse signal collecting device 4 and is used for decoding the pulse signals into downhole engineering parameters.

[0051] As can be seen from the above technical solution, in the embodiment of the downhole engineering parameter real-time measurement system provided by the utility model, the engineering parameter measuring device is arranged downhole, the pulse signal generating device is electrically connected with the engineering parameter measuring device at one end to obtain original engineering parameters and convert the original engineering parameters into pulse signals, and is connected with the bottom end of the drill string to transmit the pulse signals to the drilling fluid in the drill string for signal transmission, the pulse signal collecting device is connected with the standpipe pressure sensor arranged at the top end of the drill string to obtain the pulse signals transmitted by the drilling fluid, and the decoding device is connected with the pulse signal collecting device and is used for decoding the pulse signals into downhole engineering parameters.

[0052] Reference Figure 2 ,Figure 2 The internal composition diagram of the engineering parameter measuring device is shown in the figure. In one specific embodiment of the downhole engineering parameter real-time measuring system, the engineering parameter measuring device 1 can include:

[0053] The main control component 11;

[0054] The drilling pressure sensing component 12 is electrically connected to the main control component 11, and is used to transmit the obtained drilling pressure data to the main control component 11.

[0055] It should be noted that this drilling pressure sensing component 12 can adopt a mode including a plurality of sensors and can be modularly arranged in an array. All the data sensed by the sensors can be collected into the main control component 11 for unified processing.

[0056] Further, referring to Figure 3 and Figure 4 , Figure 3 The schematic diagram of the strain gauge attached to the engineering parameter measuring device is shown in the figure, Figure 4 The schematic diagram of the electrical connection of the strain gauge is shown in the figure. The drilling pressure sensing component 12 can include:

[0057] The drilling pressure strain gauge combination unit 121 is attached to the outer side of the engineering parameter measuring device 1, and is arranged at a position close to the upper end of the engineering parameter measuring device 1;

[0058] The drilling pressure strain gauge combination unit 121 has a first ground terminal a1 and a first voltage input terminal a2, a first positive differential voltage output terminal a3 and a first negative differential voltage output terminal a4, which are all electrically connected to the main control component 11. In this case, the main control component 11 supplies voltage from the first voltage input terminal a2, and the voltage changes after passing through different strain gauges. This is because different degrees of deformation occur at different positions under the action of drilling pressure, so different strain gauges at different positions will produce different voltage drops. Thus, the voltage output by the loop formed by different strain gauges will be different, that is, the differential voltage. The differential voltage can be used to represent the size of the strain.

[0059] The main control component 11 is used to calculate the drilling pressure according to the first positive differential voltage and the first negative differential voltage. In this case, after the main control component 11 calculates the drilling pressure in real time, it can be transmitted to the ground to realize real-time monitoring of the drilling pressure. When an abnormal situation of drilling pressure occurs, it can be discovered in time, so as not to cause the abnormal situation to be more serious, and better ensure the safety of the drilling process. In addition, the drilling pressure can be adjusted according to the real-time measurement result, so as to keep the drilling in a normal state.

[0060] Further, referring to Figure 3 The drilling pressure strain gauge combination unit 121 can include:

[0061] 4 drill pressure main strain gauges W1, W2, W3 and W4 are arranged at the first circular area on the outer side of the engineering parameter measuring device at equal angles, and the interval in this embodiment is 90°, that is, W1 and W2 are 90° apart, W2 and W3 are 90° apart, W3 and W4 are 90° apart, and W4 and W1 are 90° apart, and the four strain gauges can be located on the same circumference;

[0062] 4 drill pressure mirror strain gauges W11, W22, W33 and W44 are arranged at the second circular area on the outer side of the engineering parameter measuring device in a mirror-symmetrical manner with the 4 drill pressure main strain gauges W1, W2, W3 and W4, which are located on the back of the device (which cannot be directly shown) Figure 3 ), that is, W11 and W1 are mirror-symmetrical, W22 and W2 are mirror-symmetrical, W33 and W3 are mirror-symmetrical, and W44 and W4 are mirror-symmetrical, and W11, W22, W33 and W44 are also on the same circumference;

[0063] In which reference Figure 4 , the first drill pressure main strain gauge W1 and the third drill pressure main strain gauge W3 are connected in series between the first voltage input end a2 and the first positive differential voltage output end a3, the second drill pressure main strain gauge W2 and the fourth drill pressure main strain gauge W4 are connected in series between the first ground end a1 and the first positive differential voltage output end a3, the first drill pressure mirror strain gauge W11 and the third drill pressure mirror strain gauge W33 are connected in series between the first ground end a1 and the first negative differential voltage output end a4, and the second drill pressure mirror strain gauge W22 and the fourth drill pressure mirror strain gauge W44 are connected in series between the first voltage input end a2 and the first negative differential voltage output end a4. Of course, other connection methods can also be selected according to actual needs, which are not limited here, and when more strain gauges are used, the connection method can be adjusted accordingly.

[0064] Referring back to Figure 2 , in another specific embodiment of the above downhole engineering parameter real-time measurement system, based on the above embodiment, the above engineering parameter measuring device 1 can further include:

[0065] The torque sensing component 13 is electrically connected to the main control component 11 and is used to transmit the acquired torque data to the main control component 11.

[0066] It should be noted that this torque sensing component 13 can adopt a modular array layout including a variety of sensors, and all sensor-sensed data can be aggregated into this main control component 11 for unified processing.

[0067] Further, continuing to refer toFigure 3 and Figure 4 The torque sensing component 13 can include:

[0068] The torque strain gauge combination unit 131 is attached to the outer side of the engineering parameter measuring device 1.

[0069] The torque strain gauge combination unit 131 has a second ground terminal b1 and a second voltage input terminal b2, a second positive differential voltage output terminal b3 and a second negative differential voltage output terminal b4, all of which are electrically connected to the master component.

[0070] The master component 11 is configured to calculate the torque based on the second positive differential voltage and the second negative differential voltage. In this case, the master component 11 can transmit the calculated torque to the ground in real time to achieve real-time monitoring of the torque. When an abnormal torque occurs, it can be detected in time, so as not to cause the abnormal situation to be more serious, and better ensure the safety of the drilling process. In addition, the torque can be adjusted according to the real-time measurement result, so as to keep the drilling in a normal state.

[0071] Further, with reference to Figure 3 and Figure 4 The torque strain gauge combination unit 131 can include:

[0072] Four torque main strain gauges T1, T2, T3 and T4 are arranged at equal angles in a first circular area on the outer side of the engineering parameter measuring device. In this embodiment, the interval is 90°, that is, T1 and T2 are separated by 90°, T2 and T3 are separated by 90°, T3 and T4 are separated by 90°, and T4 and T1 are separated by 90°. The four strain gauges are located on the same circumference. Each torque main strain gauge is separated from the adjacent weight-on-bit main strain gauge by an angle of 45°, for example, T1 is located at the middle angle position between W1 and W2, and is separated from them by an angle of 45°. The other strain gauges are also arranged in the same way, which will not be described here.

[0073] Four torque mirror strain gauges T11, T22, T33 and T44 are arranged in a mirror-symmetrical manner with the four torque main strain gauges T1, T2, T3 and T4 in a second circular area on the outer side of the engineering parameter measuring device 1, that is, T11 is mirror-symmetrical with T1, T22 is mirror-symmetrical with T2, T33 is mirror-symmetrical with T3, and T44 is mirror-symmetrical with T4. T11, T22, T33 and T44 are also on the same circumference.

[0074] With reference to Figure 4, the first torque main strain gauge T1 and the third torque main strain gauge T3 are connected in series between the second voltage access end b2 and the second positive differential voltage output end b3, the second torque main strain gauge T2 and the fourth torque main strain gauge T4 are connected in series between the second ground end b1 and the second positive differential voltage output end b3, the first torque mirror surface strain gauge T11 and the third torque mirror surface strain gauge T33 are connected in series between the second ground end b1 and the second negative differential voltage output end b4, and the second torque mirror surface strain gauge T22 and the fourth torque mirror surface strain gauge T44 are connected in series between the second voltage access end b2 and the second negative differential voltage output end b4. Of course, other connection modes can be selected according to actual needs, which are not limited herein, and when more strain gauges are used, the connection mode can be adjusted accordingly.

[0075] It should be further noted that the existing downhole engineering parameter measuring device is relatively complex in mechanical structure and circuit design, which affects the reliability of the measurement data of the downhole tool under the complex stress in the well, and the strain gauges in the prior art are arranged singly instead of being arranged in an array on a measurement circuit board, resulting in large energy consumption and errors in each measurement circuit, and thus the accuracy of the final result is relatively low. It can be seen that, by using the above-mentioned embodiments of the present application, the array layout and integrated packaging of the micro-control low-consumption strain gauges can guarantee better measurement accuracy and reliability. The downhole measurement of the drilling pressure and the torque is realized by using the strain effect of the strain gauge sensing instrument shell. Four drilling pressure strain gauges on each drilling pressure strain gauge combination unit form a half-bridge, and together form a full-bridge circuit. The torque measurement is the same. The output voltage of the drilling pressure and torque measurement bridge changes linearly with the change of the pressure and the torque. Therefore, by measuring the output voltage value of the bridge, the actual engineering value of the drilling pressure and the torque can be calculated. Thus, the above-mentioned problems of the prior art can be solved, the structure is simpler, the energy consumption is reduced, and the accuracy can be effectively improved.

[0076] In the above-mentioned embodiments of the downhole engineering parameter real-time measurement system, it is continued to refer to Figure 2 The engineering parameter measuring device 1 can further include an inner temperature and inner pressure sensor 14 and / or an outer temperature and outer pressure sensor 15 and / or a vibration impact rotation speed sensor 16 and / or a three-axis acceleration sensor 17 connected with the main control component 11.

[0077] The engineering parameter measuring device further comprises a data storage component 18 connected with the main control component 11 and having a data transmission interface, so that the three-axis acceleration, torque, drilling pressure, annular inner and outer pressure, temperature, rotating speed and other parameters can be collected according to the pre-set time interval, and the collected data can be stored in the data storage component 18 for analysis after the drilling, and the measured drilling pressure, torque and other engineering parameters can be transmitted to the directional probe through the telescopic rod when the main node (the directional probe) polls, and then the MWD is used to realize the while-drilling transmission of the downhole engineering parameters of the drilling pressure and torque. It can be seen that the real-time transmission and non-real-time transmission have their own advantages, and the data security can be enhanced.

[0078] In the various embodiments of the above downhole engineering parameter real-time measuring system, the storage device 6 connected with the decoding device 5 can be further included as shown in Figure 1 The decoding device 5 can be a surface decoding box, and the storage device 6 can be located in a surface system computer.

[0079] The storage device 6 can be further connected to a display device 7 and a data center 8, and the display device can be a driller display and a depth system.

[0080] In this case, the surface decoding box can collect the pressure wave signal of the stand pressure sensor, the downhole parameter information can be decoded and restored through the surface system computer, the surface system computer can transmit the downhole information to the driller display through the QBUS, and the data can be transmitted to the satellite signal transceiver through the WITS interface to transmit the data back to the data center, so that more relevant personnel can know the downhole engineering parameter situation in real time.

[0081] In the various embodiments of the above downhole engineering parameter real-time measuring system, the pulse signal generating device 2 can be arranged in the while-drilling transmission device, which is the MWD. The pulser in the MWD can be driven by a high-efficiency and reliable direct-current brushless motor, can cut or push through the lost-circulation material and sand particles that may block other pulser, is suitable for a wide range of mud specific gravity and working conditions, can be compatible with and replace the APS of the same type, and the while-drilling transmission device can further comprise a battery and a directional probe connected with the pulse signal generating device 2 in sequence. It should be noted that the battery is used to power each component in the while-drilling transmission device, and the directional probe can be used to meet the demand of the straight well section surveying. The directional probe can internally contain three accelerometers, three flux gates, a temperature sensor and a calculation circuit, and can be used to measure, calculate, encode and generate control signals. The main function of the battery is to generate a set of +5V digital power supply and a set of ±13V digital power supply to power the MPU board and various sensors for carrying control components.

[0082] The directional probe is connected with the engineering parameter measuring device 1 through a telescopic rod which can be extended and shortened, so that the engineering parameter measuring device can be sent to a position at a certain depth in the well for measuring the downhole parameters. The length of the telescopic rod can be adjusted according to the actual required depth, so that the operation is more convenient. In this case, the drilling pressure and torque on the circuit serve as slave nodes, which can transmit the measured drilling pressure and torque and other engineering parameters to the directional probe through the QBUS communication bus when the master node (the directional probe) polls, and then the MWD realizes the while-drilling transmission of the drilling pressure and torque and other downhole parameters.

[0083] Reference Figure 5 , Figure 5 An internal composition diagram of the engineering parameter measuring device provided in the application is shown in FIG. 1. As shown in the figure, the device includes a control component 11 and an internal temperature and pressure sensor 11a, a vibration and impact rotation speed sensor 11b, an external temperature and pressure sensor 11c, a drilling pressure and torque sensor 11d, and a USB data port 11e connected to the control component 11. The control component 11 is further connected to a DC-DC power conversion module 11g through an electronic circuit 11f. The DC-DC power conversion module 11g can be connected to the MWD to obtain electric energy. Of course, the internal composition of the engineering parameter measuring device can be adaptively changed according to actual needs, which is not limited herein.

[0084] In summary, the system provided in the application has more types of measured parameters and higher accuracy, can monitor the changes of downhole engineering parameters in real time, guide the driller's operation according to the changes of downhole parameters, more accurately adjust the drilling pressure, rotation speed, torque, drilling fluid performance, etc., can timely and accurately predict whether complex downhole failures such as well kick, well leakage, sticking, and drill tool damage occur, and take corresponding measures to avoid more serious accidents, can greatly reduce the non-drilling time, and improve the drilling efficiency. The torque, drilling pressure, temperature, internal and external annular pressure, rotation speed, three-axis vibration, and other downhole engineering parameters measured by the system are closer to the drill bit, and the friction between the drill tool and the well wall and other interference factors are excluded, so that the downhole data is real and accurate, and the purpose of real-time monitoring of the actual working state of the drill tool downhole is achieved. In addition, the system adopts a modular array layout strain measurement method, integrates the drilling pressure, torque, rotation speed, internal and external temperature, internal and external pressure, vibration, and other sensors into one measurement connector, increases the directional probe to meet the inclination requirement of the straight well section, and adopts a micro-control low-consumption strain sheet array layout and integrated packaging to ensure the measurement accuracy and reliability. It can be seen that the system has the advantages of more accurate measurement of downhole data and real-time transmission.

[0085] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A real-time measurement system for downhole engineering parameters, characterized in that, The application relates to a downhole engineering parameter measurement device. The device comprises: an engineering parameter measurement device arranged downhole; a pulse signal generating device electrically connected to the engineering parameter measurement device at one end to obtain original engineering parameters and convert the original engineering parameters into pulse signals, and connected to the bottom end of a drill string at the other end to transmit the pulse signals to drilling fluid in the drill string for signal transmission; a pulse signal collecting device connected to a standpipe pressure sensor arranged at the top end of the drill string to obtain the pulse signals transmitted by the drilling fluid; 2. The real-time downhole engineering parameter measurement system of claim 1, wherein, a decoding device connected to the pulse signal collecting device to decode the pulse signals into downhole engineering parameters. The engineering parameter measurement device comprises: a main control component; 3. The real-time downhole engineering parameter measurement system of claim 2, wherein, a drilling pressure sensing component electrically connected to the main control component to transmit acquired drilling pressure data to the main control component. The drilling pressure sensing component comprises: a drilling pressure strain gauge combination unit attached to the outer side of the engineering parameter measurement device; the drilling pressure strain gauge combination unit has a first grounding end and a first voltage input end, a first positive differential voltage output end and a first negative differential voltage output end, which are all electrically connected to the main control component; 4. The real-time downhole engineering parameter measurement system of claim 3, wherein, the main control component is used for calculating drilling pressure according to the first positive differential voltage and the first negative differential voltage. The drilling pressure strain gauge combination unit comprises: four drilling pressure main strain gauges arranged at equal angles in a first circular area on the outer side of the engineering parameter measurement device; four drilling pressure mirror strain gauges arranged in a mirror-symmetrical mode with the four drilling pressure main strain gauges in a second circular area on the outer side of the engineering parameter measurement device, and the second circular area is located at a position on the engineering parameter measurement device which is opposite to the first circular area; 5. The real-time downhole engineering parameter measurement system of claim 4, wherein, wherein the first drilling pressure main strain gauge and the third drilling pressure main strain gauge are connected in series between the first voltage input end and the first positive differential voltage output end, the second drilling pressure main strain gauge and the fourth drilling pressure main strain gauge are connected in series between the first grounding end and the first positive differential voltage output end, the first drilling pressure mirror strain gauge and the third drilling pressure mirror strain gauge are connected in series between the first grounding end and the first negative differential voltage output end, and the second drilling pressure mirror strain gauge and the fourth drilling pressure mirror strain gauge are connected in series between the first voltage input end and the first negative differential voltage output end. The engineering parameter measurement device further comprises:

6. The real-time downhole engineering parameter measurement system of claim 5, wherein, a torque sensing component electrically connected to the main control component to transmit acquired torque data to the main control component. The torque sensing component comprises: a torque strain gauge combination unit attached to the outer side of the engineering parameter measurement device; the torque strain gauge combination unit has a second grounding end and a second voltage input end, a second positive differential voltage output end and a second negative differential voltage output end, which are all electrically connected to the main control component; 7. The real-time downhole engineering parameter measurement system of claim 6, wherein, the main control component is used for calculating torque according to the second positive differential voltage and the second negative differential voltage. The torque strain gauge combination unit comprises: four torque main strain gauges arranged at equal angles in the first circular area on the outer side of the engineering parameter measurement device, and each torque main strain gauge is spaced apart from the adjacent drilling pressure main strain gauge at an angle of 45 degrees. 4 torque mirror strain gauges are arranged in the second circular area of the outer side of the engineering parameter measuring device in mirror symmetry with the 4 torque main strain gauges; The first torque main strain gauge and the third torque main strain gauge are connected in series between the second voltage input end and the second positive differential voltage output end, the second torque main strain gauge and the fourth torque main strain gauge are connected in series between the second ground end and the second positive differential voltage output end, the first torque mirror strain gauge and the third torque mirror strain gauge are connected in series between the second ground end and the second negative differential voltage output end, and the second torque mirror strain gauge and the fourth torque mirror strain gauge are connected in series between the second voltage input end and the second negative differential voltage output end.

8. The real-time downhole engineering parameter measurement system of any of claims 2-7, wherein, The engineering parameter measuring device further comprises an inner temperature and inner pressure sensor and / or an outer temperature and outer pressure sensor and / or a vibration and impact rotational speed sensor and / or a three-axis acceleration sensor connected with the main control component. The engineering parameter measuring device further comprises a data storage component connected with the main control component and having a data transmission interface.

9. The real-time downhole engineering parameter measurement system of any of claims 1-7, wherein, The decoding device is further connected with a storage device. The storage device is further connected with a display device and a data center.

10. The real-time downhole engineering parameter measurement system of any of claims 1-7, wherein, The pulse signal generating device is arranged in a while-drilling transmission device, and the while-drilling transmission device further comprises a battery and a directional probe connected with the pulse signal generating device in sequence. The directional probe is connected with the engineering parameter measuring device by means of a telescopic rod.

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