阅读说明：本技术 一种基于电机变频控制的旋转导向指令下传系统 (Rotary guide instruction downloading system based on motor frequency conversion control ) 是由 刘伟 陆灯云 韩烈祥 白璟 张德军 高林 胡超 连太炜 汪洋 陈东 谭东 冯思 于 2020-04-30 设计创作，主要内容包括：本发明公开了一种基于电机变频控制的旋转导向指令下传系统,属于石油钻井技术领域,包括电机、泥浆泵、旋转导向机构和MWD系统,其特征在于：还包括UPS、输入触摸屏、电机控制器箱体、电机变频控制箱、涡轮发电机、电压采集判断器和井下微处理器,输入触摸屏与电机控制器箱体电连接,电机控制器箱体与电机变频控制箱电连接,泥浆泵与涡轮发电机连接,涡轮发电机与电压采集判断器电连接,井下微处理器与旋转导向机构电连接,MWD系统分别与井下微处理器和电压采集判断器电连接。本发明结合井下涡轮电机采集电压判断和井下微处理器编码处理实现下传指令验证,极大的减小了误码率,具有下传速度快、精度高和操作简便的特点。(The invention discloses a rotary steering instruction downloading system based on motor frequency conversion control, which belongs to the technical field of petroleum drilling and comprises a motor, a slurry pump, a rotary steering mechanism and an MWD system, and is characterized in that: the system comprises a motor controller box, a mud pump, a turbine generator, a voltage acquisition and judgment device and an underground microprocessor, wherein the input touch screen is electrically connected with the motor controller box, the motor controller box is electrically connected with the motor variable frequency control box, the mud pump is connected with the turbine generator, the turbine generator is electrically connected with the voltage acquisition and judgment device, the underground microprocessor is electrically connected with a rotary guide mechanism, and the MWD system is electrically connected with the underground microprocessor and the voltage acquisition and judgment device respectively. The method realizes the verification of the downloading instruction by combining the judgment of the voltage acquired by the underground turbine motor and the coding processing of the underground microprocessor, greatly reduces the error rate, and has the characteristics of high downloading speed, high precision and simple and convenient operation.)

1. The utility model provides a rotatory direction instruction system of passing down based on motor frequency conversion control, includes motor, slush pump, rotatory guiding mechanism and MWD system, and the motor is connected with the slush pump, its characterized in that: still include UPS, input touch-sensitive screen, machine controller box, motor variable frequency control case, turbine generator, voltage acquisition judgement device and microprocessor in the pit, the machine controller box is connected with the UPS electricity, input touch-sensitive screen and machine controller box electricity are connected, the machine controller box is connected with the machine variable frequency control case electricity, the machine variable frequency control case is connected with the motor electricity, the slush pump is connected with turbine generator, turbine generator is connected with voltage acquisition judgement device electricity, voltage acquisition judgement device is connected with microprocessor in the pit electricity, microprocessor in the pit is connected with rotatory guiding mechanism electricity, the MWD system is connected with microprocessor in the pit and voltage acquisition judgement device electricity respectively, and the MWD system is used for carrying out invalid instruction retransmission request, and the transmission of transmission instruction is to rotatory guiding mechanism.

2. The rotary steering instruction downloading system based on motor frequency conversion control according to claim 1, wherein: and the underground microprocessor is used for processing the voltage signal and judging a messy code invalid downloading instruction and a null code invalid downloading instruction.

3. The rotary steering instruction downloading system based on motor frequency conversion control according to claim 1, wherein: and the motor controller box is used for receiving input parameters input into the touch screen, processing input data and outputting a motor frequency conversion control instruction.

4. The rotary steering instruction downloading system based on motor frequency conversion control according to claim 3, wherein: and the motor variable frequency control box is used for receiving a motor variable frequency control command, carrying out command conversion and control signal amplification, and transmitting the amplified control signal to the motor.

5. The rotary steering instruction downloading system based on motor frequency conversion control according to claim 4, wherein: the motor is used for receiving the frequency conversion signal to control the rotating speed, and the pump stroke of the slurry pump is adjusted through the rotating speed of the motor to form corresponding discharge capacity.

6. The rotary steering instruction downloading system based on motor frequency conversion control according to claim 1, wherein: the turbine generator is used for generating turbine voltage under the action of slurry and transmitting the turbine voltage to the voltage acquisition judger.

7. The rotary steering instruction downloading system based on motor frequency conversion control according to claim 6, wherein: and the voltage acquisition judger is used for acquiring voltage and judging invalid voltage, and transmitting the acquired valid voltage signal to the underground microprocessor for processing.

8. The rotary steering command downloading system based on motor frequency conversion control according to claim 7, wherein: the motor controller box comprises a control circuit main board, a central processing module electrically connected to the control circuit main board, a power supply module, a data acquisition module and an instruction sending module, a power supply port, a data input port and an instruction output port are arranged on the motor controller box, the power supply module and the data acquisition module are electrically connected with the central processing module, the central processing module is electrically connected with the instruction sending module, the data acquisition module is connected with the data input port and used for acquiring input data and providing data for the central processing module, and the central processing module processes the input data and outputs a motor frequency conversion control instruction through the instruction output port.

9. The rotary steering command downloading system based on motor frequency conversion control according to claim 8, wherein: and the central processing module is used for converting the analog electric signal of the data acquisition module into a binary code which can be identified by the central processing module and carrying out operation.

10. The rotary steering command downloading system based on the motor frequency conversion control as claimed in claim 9, wherein: the motor frequency conversion control box comprises an instruction conversion circuit, a driving circuit and a frequency converter, wherein the instruction conversion circuit is used for setting parameters according to download bit delay time and slurry pump discharge capacity variation, converting required data into a control signal of motor rotating speed and then outputting the control signal to the driving circuit, and the driving circuit amplifies the control signal and transmits the amplified control signal to the motor.

Technical Field

The invention relates to the technical field of petroleum drilling, in particular to a rotary steering instruction downloading system based on motor frequency conversion control.

Background

The rotary steering system is a steering type drilling system which can complete the steering function in real time while drilling when a drill column is rotated and drilled. The rotary steering drilling has the characteristics of small friction resistance and torsion resistance, high drilling speed, low cost, short well construction period, smooth well track, easy regulation and control and capability of prolonging the length of a horizontal section, and is considered as the development direction of the modern steering drilling technology. The work mode of the rotary steering system is recorded in the tool through codes, when an engineer needs to change the work mode, the codes are downloaded to the tool for recognition through changing the top drive rotating speed or the displacement, and the tool switches the work mode after recognizing the codes and transmits pulse signals to the ground, so that the bidirectional communication mode is realized.

At present, there are two main methods for downloading instructions: one method is based on changing the top drive rotation speed, and the 1 and 0 codes are corresponding to the top drive rotation speed. When an instruction needs to be downloaded, the driller lifts the drill bit away from the bottom of the well and keeps the top drive high rotating speed for a certain time, then the top drive rotating speed is quickly adjusted according to the high and low rotating speeds corresponding to the codes, each rotating speed is kept for a certain time, and a series of codes are repeatedly finished in the past. The method has the advantages that the underground displacement can be kept unchanged, and the change of the rotating speed is fast. And the other method is based on changing the mud discharge capacity, and the mud pulse codes of 1 and 0 are correspondingly turned on and off of the mud pump, or the mud pulse codes of 1 and 0 are correspondingly turned on and off of the mud pump. When the command is required to be downloaded, a specific code is formed by combining the on and off states and time of the mud pump, so that the ground command can be downloaded, or the specific code is formed by manually adjusting the discharge capacity of the mud pump, combining the discharge capacity and the time of the pump, so that the ground command can be downloaded. The method is an instruction downloading method generally applied to the current rotary steering drilling system, but the speed of transmitting a downloading instruction by turning on and off a pump and manually adjusting the discharge capacity of mud is low, the precision is low, the operation is complicated, the error rate is high, the instruction downloading speed and the steering precision are influenced, meanwhile, the service life of a mud pump is greatly shortened by frequently turning on and off the pump, and the operation cost is increased.

Chinese patent publication No. CN 106703793a, published as 2017, 05 and 24 discloses a rotary steering ground control command downloading execution device, which is characterized in that: the rotary guide ground control instruction downloading execution device builds an instruction downloading control system through a pneumatic control system, and is provided with a manual position adjusting cylinder to realize discharge amount adjustment of the discharged slurry.

The rotary steering ground control command downloading and executing device disclosed in the patent document can automatically download and execute a ground control command, and does not affect normal drilling; the mud discharge capacity of the transmission and diversion flow can be manually adjusted, and the requirement of site discharge capacity is met. However, the problems of slow downloading speed, low precision, complicated operation and high error rate still exist.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a rotary guide instruction downloading system based on motor frequency conversion control.

The invention is realized by the following technical scheme:

the utility model provides a rotatory direction instruction system of passing down based on motor frequency conversion control, includes motor, slush pump, rotatory guiding mechanism and MWD system, and the motor is connected with the slush pump, its characterized in that: still include UPS, input touch-sensitive screen, machine controller box, motor variable frequency control case, turbine generator, voltage acquisition judgement device and microprocessor in the pit, the machine controller box is connected with the UPS electricity, input touch-sensitive screen and machine controller box electricity are connected, the machine controller box is connected with the machine variable frequency control case electricity, the machine variable frequency control case is connected with the motor electricity, the slush pump is connected with turbine generator, turbine generator is connected with voltage acquisition judgement device electricity, voltage acquisition judgement device is connected with microprocessor in the pit electricity, microprocessor in the pit is connected with rotatory guiding mechanism electricity, the MWD system is connected with microprocessor in the pit and voltage acquisition judgement device electricity respectively, and the MWD system is used for carrying out invalid instruction retransmission request, and the transmission of transmission instruction is to rotatory guiding mechanism.

And the underground microprocessor is used for processing the voltage signal and judging a messy code invalid downloading instruction and a null code invalid downloading instruction.

And the motor controller box is used for receiving input parameters input into the touch screen, processing input data and outputting a motor frequency conversion control instruction.

And the motor variable frequency control box is used for receiving a motor variable frequency control command, carrying out command conversion and control signal amplification, and transmitting the amplified control signal to the motor.

The motor is used for receiving the frequency conversion signal to control the rotating speed, and the pump stroke of the slurry pump is adjusted through the rotating speed of the motor to form corresponding discharge capacity.

The turbine generator is used for generating turbine voltage under the action of slurry and transmitting the turbine voltage to the voltage acquisition judger.

And the voltage acquisition judger is used for acquiring voltage and judging invalid voltage, and transmitting the acquired valid voltage signal to the underground microprocessor for processing.

The motor controller box comprises a control circuit main board, a central processing module electrically connected to the control circuit main board, a power supply module, a data acquisition module and an instruction sending module, a power supply port, a data input port and an instruction output port are arranged on the motor controller box, the power supply module and the data acquisition module are electrically connected with the central processing module, the central processing module is electrically connected with the instruction sending module, the data acquisition module is connected with the data input port and used for acquiring input data and providing data for the central processing module, and the central processing module processes the input data and outputs a motor frequency conversion control instruction through the instruction output port.

And the central processing module is used for converting the analog electric signal of the data acquisition module into a binary code which can be identified by the central processing module and carrying out operation.

The motor frequency conversion control box comprises an instruction conversion circuit, a driving circuit and a frequency converter, wherein the instruction conversion circuit is used for setting parameters according to download bit delay time and slurry pump discharge capacity variation, converting required data into a control signal of motor rotating speed and then outputting the control signal to the driving circuit, and the driving circuit amplifies the control signal and transmits the amplified control signal to the motor.

The motor controller box is electrically connected with the UPS through a power supply port, receives input parameters input into the touch screen through a data input port, processes input data through the control circuit main board and outputs a motor frequency conversion control instruction through an instruction output port.

One end of the motor variable frequency control box is connected with an instruction output port of the motor controller box body, and the other end of the motor variable frequency control box is connected with the motor.

The UPS refers to an uninterruptible power supply.

The MWD system is a measurement while drilling system, and is a system which performs underground measurement and realizes wireless transmission in the drilling process and transmits measurement information data to the ground by using mud pulses in a drill string.

The beneficial effects of the invention are mainly shown in the following aspects:

1. the invention relates to a 'motor controller box body is electrically connected with a UPS, an input touch screen is electrically connected with the motor controller box body, the motor controller box body is electrically connected with a motor variable frequency control box, the motor variable frequency control box is electrically connected with a motor, a slurry pump is connected with a turbine generator, the turbine generator is electrically connected with a voltage acquisition judging device, the voltage acquisition judging device is electrically connected with a downhole microprocessor, the downhole microprocessor is electrically connected with a rotary guide mechanism, an MWD system is respectively and electrically connected with the downhole microprocessor and the voltage acquisition judging device, the MWD system is used for executing an invalid instruction retransmission request, a downlink instruction is transmitted to the rotary guide mechanism', the UPS and the input touch screen are introduced, the motor controller box body is equipped, the motor variable frequency control box is accessed for motor rotation speed control, and further pump stroke of the slurry pump at a specific time is, the turbine generator changes the rotating speed under the action of slurry to form turbine voltage under each displacement, further combines collected voltage judgment and underground microprocessor coding processing to realize downloading instruction verification, completes an invalid instruction retransmission request by means of an MWD (measurement while drilling) system, and further realizes effective downloading and verification of a rotary steering instruction.

2. According to the invention, based on the parameters of the input binary download code, the discharge capacity retention time and the code discharge capacity, the motor controller box is adopted to carry out input data acquisition and high-efficiency data processing, so that the output of a motor variable frequency control signal is realized, and the motor variable frequency control box is further utilized to rapidly and accurately control the rotating speed of the motor, thereby realizing the high-efficiency and accurate control of the pump stroke of the slurry pump, and effectively solving the problems of low download speed and low accuracy of the traditional rotary steering instruction.

3. According to the invention, after the downloading command code is input to start the downloading function, manual 'on' and 'off' of the slurry pump or manual adjustment of the pump stroke of the slurry pump are not needed to perform the command code, so that the problems of complicated operation and error rate in the conventional manual adjustment of the slurry pump for command downloading are solved, and the service life of the slurry pump is prolonged.

Drawings

The invention will be further described in detail with reference to the drawings and the detailed description, in which:

fig. 1 is a block diagram of a download system according to the present invention.

Detailed Description