CN106368684B - A wireless test sub for drilling - Google Patents

Abstract

The invention provides a wireless test nipple for drilling, which comprises a sleeve, a circuit board and a power module, wherein one end of the sleeve is connected with an adapter, the other end of the sleeve is connected with a receiving device, the other end of the adapter is connected with equipment to be tested, the sleeve is provided with a containing cavity, an opening is formed in the side face of the sleeve, a cover plate is covered on the opening, a support is arranged in the containing cavity, at least one containing groove is arranged on the support, the containing groove is opposite to the opening, a baffle is arranged between adjacent containing grooves, a gyroscope module, an MCU module, a CAN communication module, an FSK modem module and a Zigbee communication module are integrated on the circuit board, the MCU module acquires measurement parameters of the equipment to be tested through the CAN communication module and the FSK modem module, the gyroscope module acquires rotation data of the equipment to be tested, and the acquired measurement parameters and rotation data are transmitted to an upper computer through the Zigbee communication module. The invention has simple structure, convenient measurement and difficult damage.

Description

A wireless test sub for drilling

Technical field

The invention belongs to the field of petroleum exploration, and in particular relates to a wireless test sub for drilling.

Background technique

In modern drilling technology, more and more sensors are installed in the downhole drill string to measure the wellbore environment and parameters while drilling, such as pressure, space attitude, temperature, gamma, etc. Data from the sensors are fed to a measurement-while-drilling device, which then transmits it to the surface. With the depletion of global oil and gas resources and the increasing demand for energy from social development, the development of low-pressure oil and gas reservoirs and coalbed methane has received more and more attention. At the same time, in order to better develop such resources, more special drilling technologies are used. , such as directional wells, horizontal wells, underbalanced drilling, geosteering drilling, gas drilling, etc., need to obtain various detailed drilling process parameters and geological parameters. These parameters need to be sent to the ground in real time during the drilling process to provide decision-making for on-site engineers. in accordance with.

Electromagnetic wireless measurement while drilling uses electromagnetic waves to communicate between the downhole measurement and control system and the ground base station to realize the trajectory detection and control of the drill bit and the real-time processing of downhole exploration data in the ground processor. The insulating nipple is the key to wireless communication of wireless measurement while drilling instruments. It insulates the drill pipe at the upper and lower ends to act as the two poles of the wireless signal transmitting antenna, thereby transmitting and receiving wireless signals. Since the insulating nipple is of great significance for monitoring downhole drilling tools, it is necessary to perform a rotation test on the measuring instrument connected to the insulating nipple before performing downhole drilling work.

The current wireless test nipple is mainly used for testing in factory buildings at normal temperature. However, according to work needs, there are many instruments that need to be rotated for testing. Each instrument requires a separate design of the interface of the rotary joint, which is very inconvenient, and the connections of the rotary joint are often damaged.

Therefore, it is necessary to propose a new technical solution.

Contents of the invention

In view of the above problems, the present invention proposes a wireless test sub for drilling, which has a simple structure, convenient measurement, and reduces the damage rate of the product.

The invention provides a wireless test sub joint for drilling. The sub joint includes a sleeve, a circuit board and a power module. The circuit board and the power module are both located in the sleeve. One end of the sleeve is connected to a rotary connector, the other end of the sleeve is connected to a receiving device, and the other end of the adapter is connected to the device to be tested,

The sleeve has an accommodating cavity, and an opening connected to the accommodating cavity is provided on the side of the sleeve. The opening is covered with a cover plate, and a bracket is provided in the accommodating cavity. At least one receiving groove is provided, the receiving groove is opposite to the opening, and a baffle is provided between adjacent receiving grooves;

The circuit board is integrated with a gyroscope module, MCU module, CAN communication module, FSK modulation and demodulation module and Zigbee communication module. The MCU module collects the measurements of the device under test through the CAN communication module and FSK modulation and demodulation module. Parameters, the gyroscope module collects the rotation data of the device under test, and the collected measurement parameters and rotation data are transmitted to the host computer through the Zigbee communication module.

Further, the power module includes a plurality of batteries and a charge management circuit for monitoring battery status. The plurality of batteries are accommodated in the accommodation slot, and the power supply voltage of the batteries is 10-18V.

Further, the charging management circuit includes a first power conversion module, a second power conversion module, a first battery voltage and current detection module, a second battery voltage and current detection module and an undervoltage, overvoltage and overcurrent protection module. The first The power conversion module and the second power conversion module are respectively connected to the power module. The power module is used to supply power to the circuit board through the first power conversion module. The power module is used to provide power to the circuit board through the second power conversion module. The measuring equipment supplies power; the first battery voltage and current detection module is used to monitor the voltage and current status of the power module, and the second battery voltage and current detection module is used to monitor the voltage and current status of the second power conversion module, so The undervoltage, overvoltage and overcurrent protection module is used to monitor the circuit between the battery and the device under test.

Furthermore, the sleeve is also provided with a power indicator light and a power switch, and the power switch is used to control the opening and closing of the power module.

Further, the charging management circuit also includes a first control switch and a second control switch. The MCU module is used to monitor and determine the power status of the battery. When the battery power is lower than the set power, the MCU module controls The first control switch is closed, and the power indicator light lights up in red or flashes; when the battery power reaches the set power level, the MCU module controls the first control switch to turn off and the second control switch to close, so The power indicator light above lights green.

Further, the host computer is provided with a Zigbee receiving module, a microprocessor and a USB-to-serial port module. The Zigbee receiving module and the microprocessor are connected through an asynchronous serial communication port. The Zigbee receiving module is used for The signal sent by the Zigbee communication module is received, and the microprocessor and the USB-to-serial port module are communicated through an asynchronous serial communication port.

Further, the host computer is a monitoring computer, which is used for synchronous monitoring, data analysis and data storage of the received data.

Further, the outer diameter of the adapter is smaller than the outer diameter of the sleeve.

Further, the adapter and the sleeve are fixedly connected by bolts, and the adapter and the device under test are connected by bolts.

Further, the adapter is also provided with a gyroscope module interface, and the gyroscope module interface is used to connect with the gyroscope module.

The wireless test sub for drilling of the present invention uses an adapter to fix the connection between the equipment under test and the sub. The electronic connection is connected by a soft wire. The wireless test sub and the equipment under test rotate together, and the data is transmitted wirelessly. To the computer, the equipment under test and the turntable only need to provide hardware connections. The structure is simple and easy to measure, which reduces the damage rate of the product.

Description of the drawings

In order to explain the technical solutions of the present invention more clearly, the drawings needed to be used in the embodiments or description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. , for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic structural diagram of a wireless test sub for drilling according to the present invention;

Figure 2 is a schematic cross-sectional view along line A-A of Figure 1;

Figure 3 is a schematic structural diagram of the wireless test sub joint used for drilling according to the present invention;

Figure 4 is a circuit structural block diagram of the present invention;

Figure 5 is a block diagram of the transmission between the wireless communication module and the host computer of the present invention.

Among them, 1-sleeve, 2-adapter, 3-receiving device, 4-equipment under test, 5-cover plate, 6-bracket, 7-accommodating slot, 8-indicator light, 9-power switch, 10-accommodation Cavity, 11-circuit board, 12-baffle, 13-bolt.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without any creative work fall within the scope of protection of the present invention.

Please refer to Figures 1 to 3. Figure 1 is a schematic structural diagram of the sub-joint for wireless measurement while drilling according to the present invention; Figure 2 is a schematic cross-sectional view of A-A in Figure 1; Figure 3 is a schematic structural diagram of the sub-joint for wireless measurement while drilling according to the present invention. As shown in Figures 1 to 3, the nipple of the present invention includes a sleeve 1, a circuit board 11 and a power module. The circuit board 11 and the power module are both located in the sleeve 1. One end of the sleeve 1 is connected to There is an adapter 2, and the other end of the sleeve 1 is connected to a receiving device 3. The other end of the adapter 2 is connected to the device 4 under test.

The sleeve 1 has an accommodating cavity 10, and an opening connected to the accommodating cavity 10 is provided on the side of the sleeve 1. The opening is covered with a cover plate 5. The cover plate 5 is connected to the sleeve 1 through bolts 13 to cover the opening.

A bracket 6 is provided in the accommodation cavity 10 , and at least one accommodation groove 7 is provided on the bracket 6 . The accommodation groove 7 is opposite to the opening, and a baffle 12 is provided between adjacent accommodation grooves 7 .

The circuit board is integrated with a gyroscope module, MCU module, CAN communication module, FSK modulation and demodulation module and wireless communication module. The MCU module collects the measurements of the device under test through the CAN communication module and FSK modulation and demodulation module. Parameters, the gyroscope module collects the rotation data of the device under test, and the collected measurement parameters and rotation data are transmitted to the host computer through the wireless communication module.

In one embodiment, the wireless communication module 11 is a Zigbee communication module or a wifi communication module.

In yet another embodiment, data transmission between the device under test and the wireless communication nipple is through CAN or FS33 communication.

The power module includes multiple batteries and a charge management circuit for monitoring battery status. The multiple batteries are accommodated in the accommodation slot 7 , and the power supply voltage of the batteries is 10-18V. The battery can be removed from or placed into the receiving groove through the opening. Multiple batteries are AA alkaline batteries, and multiple batteries are connected in series. In a preferred embodiment, in order to ensure that the alkaline batteries provide sufficient power, 8 alkaline batteries can be connected in series. The voltage of each alkaline battery is 1.5V. The voltage provided by the 8 alkaline batteries is 12V. The capacity of 8 alkaline batteries is 1500mAh. In another embodiment, the plurality of batteries are AA rechargeable lithium batteries, and the plurality of rechargeable lithium batteries are connected in series and parallel. In a preferred embodiment, there are 8 AA rechargeable lithium batteries. The 8 rechargeable lithium batteries are divided into two groups. The two groups are connected in parallel. Each group includes 4 rechargeable lithium batteries connected in series. The voltage of the rechargeable lithium battery is 3.7V, and the total capacity of the 8 rechargeable lithium batteries is 1600mAh.

In one embodiment, the sleeve 1 is also provided with a charging interface. The charging interface is a power adapter interface or a USB interface, and multiple rechargeable lithium batteries are connected to an external power source through the charging interface.

Please refer to Figure 4, which is a block diagram of the circuit structure of the present invention. As shown in Figure 4, the charging management circuit includes a first power conversion module, a second power conversion module, a first battery voltage and current detection module, a second battery voltage and current detection module and an undervoltage, overvoltage and overcurrent protection module. The first power conversion module and the second power conversion module are respectively connected to the power module. The power module is used to power the circuit board through the first power conversion module. The power module is used to power the circuit board through the second power conversion module. The device under test supplies power; the first battery voltage and current detection module is used to monitor the voltage and current status of the power module, and the second battery voltage and current detection module is used to monitor the voltage and current of the second power conversion module. status, the undervoltage, overvoltage and overcurrent protection module is used to monitor the circuit between the battery and the device under test.

The sleeve 1 is also provided with a power indicator light 8 and a power switch 9. The power switch is used to control the opening and closing of the power module. The power indicator light 8 is an LED light.

The charging management circuit also includes a first control switch and a second control switch. The MCU module is used to monitor and determine the power status of the battery. When the battery power is lower than the set power, the MCU module controls the third control switch. When a control switch is closed, the power indicator light lights up in red or flashes; when the battery power reaches the set power level, the MCU module controls the first control switch to turn off and the second control switch to close, and the power indicator light The light lights up green.

Please refer to Figure 5, which is a transmission block diagram between the wireless communication module and the host computer of the present invention. As shown in Figure 5, the host computer is provided with a wireless receiving module, a microprocessor and a USB-to-serial module. The wireless receiving module and the microprocessor are connected through an asynchronous serial communication port. The wireless receiving module The module is used to receive signals sent by the wireless communication module, and the microprocessor and the USB-to-serial port module are communicated through an asynchronous serial communication port. The wireless receiving module is a Zigbee receiving module or a wifi receiving module.

The power module includes a rechargeable lithium battery, a battery protection circuit and a charge management circuit. The rechargeable lithium battery is accommodated in the accommodation cavity. The rechargeable lithium battery is connected to an external power source through a charging interface.

The power module also includes a battery protection circuit and a charging management circuit. The battery protection circuit includes an overcharge control tube and an overdischarge control tube. The MCU module is used to monitor the battery voltage and control it. When the battery charging voltage is greater than the set voltage, the MCU module controls the overcharge control tube. Cut off; when the battery discharge voltage is less than the set voltage, the MCU module controls the over-discharge control tube to cut off; when the current on the load in the circuit is greater than the set current, the protection chip controls the over-discharge control tube to cut off .

The overcharge control tube and the overdischarge control tube are both MOSFETs (Metal-Oxide-Semiconductor Field-Effect Transistor, MOSFET for short), and the overcharge control tube and the overdischarge control tube are connected in series.

The charging management circuit also includes a first control switch and a second control switch. The MCU module is used to monitor and determine the power status of the battery. When the battery power is lower than the set power, the MCU module controls the third control switch. When a control switch is closed, the power indicator light lights up in red or flashes; when the battery power reaches the set power level, the MCU module controls the first control switch to turn off and the second control switch to close, and the power indicator light The light lights up green.

Both the first control switch and the second control switch are MOSFETs.

In one embodiment, the host computer is a monitoring computer, and the monitoring computer is used for synchronous monitoring, data analysis and data storage of received data.

In one embodiment, the outer diameter of the adapter 2 is smaller than the outer diameter of the sleeve 1 . The device under test 4 is connected to the adapter 2. Since the outer diameter of the adapter 2 is smaller, it not only provides a rotation guide between the device under test 4 and the sleeve 1, but also ensures that the device under test 4 and the sleeve 1 can rotate synchronously. . The adapter 2 of the present invention is smaller in size and does not affect the downhole operation.

The adapter 2 and the sleeve 1 are fixedly connected by bolts, and the adapter 2 and the device to be tested 4 are connected by bolts.

The adapter 2 is also provided with a gyroscope module interface, and the gyroscope module interface is used to connect with the gyroscope module.

The first power conversion module of the present invention supplies power to the circuit board (the circuit requires 5V and 3.3V voltage to power each functional module), and the second power conversion module supplies power to the device under test, which requires 30V voltage.

The invention is designed to detect the power supply voltage of the equipment under test to prevent data errors caused by insufficient power supply; the power supply circuit for the equipment under test is designed with undervoltage, overvoltage, and overcurrent protection circuits to ensure that power is supplied to the equipment under test without Damage to the device under test.

The circuit of the invention is designed with battery voltage and current detection to detect battery status at all times to ensure a complete test without interruption. When low voltage is detected, the indicator light flashes to remind the user to replace the battery.

Data communication is carried out between the equipment to be tested and the wireless test nozzle of the present invention through FS33, and an FSK modulation and demodulation circuit is designed.

The wireless test sub for drilling of the present invention uses an adapter to fix the connection between the equipment under test and the sub. The electronic connection is connected by a soft wire. The wireless test sub and the equipment under test rotate together, and the data is transmitted wirelessly. To the computer, the equipment under test and the turntable only need to provide hardware connections. The structure is simple and easy to measure, which reduces the damage rate of the product.

What is disclosed above is only a few preferred embodiments of the present invention. Of course, this cannot be used to limit the scope of the present invention. Therefore, equivalent changes made in accordance with the claims of the present invention still fall within the scope of the present invention.

Claims (7)

1. A wireless test nipple joint for well drilling, its characterized in that: the short joint comprises a sleeve (1), a circuit board and a power supply module, wherein the circuit board and the power supply module are both positioned in the sleeve, one end of the sleeve (1) is connected with an adapter (2), the outer diameter of the adapter (2) is smaller than that of the sleeve (1), the other end of the sleeve (1) is connected with a receiving device (3), the other end of the adapter (2) is connected with equipment (4) to be tested,

the sleeve (1) is provided with a containing cavity (10), an opening communicated with the containing cavity (10) is formed in the side face of the sleeve (1), a cover plate (5) is covered on the opening, a support (6) is arranged in the containing cavity (10), at least one containing groove (7) is arranged on the support, the containing groove (7) is opposite to the opening, and a baffle plate (12) is arranged between every two adjacent containing grooves (7);

the circuit board is integrated with a gyroscope module, an MCU module, a CAN communication module, an FSK modulation and demodulation module and a Zigbee communication module, the MCU module acquires measurement parameters of the equipment to be tested through the CAN communication module and the FSK modulation and demodulation module, the gyroscope module acquires rotation data of the equipment to be tested, and the acquired measurement parameters and rotation data are transmitted to an upper computer through the Zigbee communication module;

the power supply module comprises a plurality of batteries and a charging management circuit for monitoring the state of the batteries, the batteries are accommodated in the accommodating groove (7), and the power supply voltage of the batteries is 10-18V;

the charging management circuit comprises a first power supply conversion module, a second power supply conversion module, a first battery voltage and current detection module, a second battery voltage and current detection module and an undervoltage overvoltage and overcurrent protection module, wherein the first power supply conversion module and the second power supply conversion module are respectively connected with the power supply module, the power supply module is used for supplying power to the circuit board through the first power supply conversion module, and the power supply module is used for supplying power to the equipment to be tested through the second power supply conversion module; the first battery voltage and current detection module is used for monitoring the voltage and current states of the power supply module, the second battery voltage and current detection module is used for monitoring the voltage and current states of the second power supply conversion module, and the undervoltage overvoltage overcurrent protection module is used for monitoring a circuit between the battery and equipment to be tested.

2. The wireless test sub for drilling as in claim 1, wherein: the sleeve (1) is also provided with a power indicator lamp (8) and a power switch (9), and the power switch is used for controlling the on-off of the power module.

3. The wireless test sub for drilling as in claim 2, wherein: the charging management circuit further comprises a first control switch and a second control switch, the MCU module is used for monitoring and judging the state of charge of the battery, when the electric quantity of the battery is lower than the set electric quantity, the MCU module controls the first control switch to be closed, and the power indicator lights are lightened to be red or flash; when the electric quantity of the battery reaches the set electric quantity, the MCU module controls the first control switch to be cut off, the second control switch to be closed, and the power indicator lights are lighted to be green.

4. The wireless test sub for drilling as in claim 1, wherein: the upper computer is provided with a Zigbee receiving module, a microprocessor and a USB-to-serial port module, wherein the Zigbee receiving module is in communication connection with the microprocessor through an asynchronous serial communication port, the Zigbee receiving module is used for receiving signals sent by the Zigbee communication module, and the microprocessor is in communication connection with the USB-to-serial port module through the asynchronous serial communication port.

5. The wireless test sub for drilling as in claim 1, wherein: the upper computer is a monitoring computer, and the monitoring computer is used for synchronously monitoring, analyzing and storing the received data.

6. The wireless test sub for drilling as in claim 1, wherein: the adapter (2) is fixedly connected with the sleeve (1) through bolts, and the adapter (2) is connected with the equipment (4) to be tested through bolts.

7. The wireless test sub for drilling as in claim 1, wherein: and a gyroscope module interface is further arranged on the adapter (2), and the gyroscope module interface is used for being connected with the gyroscope module.