CN204899774U - Rotatory steerable drilling control system structure - Google Patents

Abstract

The utility model discloses a structure of a rotary steerable drilling control system, which includes a ground control system, a ground control box, a bypass valve, an MWD system, an underground master control board and a main control board; it also includes an underground generator, a generator installation section, The coupler and the coupler installation section for installing the coupler, the attitude data acquisition component near the drill bit and the power board; the downhole generator is fixedly installed inside the generator installation section, and the end of the generator installation section is connected to the guide tool The ends of the coupler installation section are interpenetrated and fixedly connected; the attitude data acquisition component near the drill bit includes a three-axis accelerometer arranged coaxially with the circuit compartment, and the three-axis accelerometer is connected to the signal of the main control board; the power transmission of the main control board The main control board is connected to the control signal end of the hydraulic mechanism used to control the action of the wing rib through the power board and the battery in the circuit compartment. The hardware part structure of the drilling control system with the characteristics of automation, intelligence and high efficiency has been obtained.

Description

Structure of a Rotary Steerable Drilling Control System

technical field

The utility model belongs to the field of petroleum exploration and development, in particular to a structure of a control system for rotary steerable drilling.

Background technique

Rotary steerable drilling technology originated in the late 1980s. This technology was developed on the basis of sliding steerable drilling technology and technology to meet the actual needs of the petroleum industry with the improvement of related technology. The basic idea is to apply a certain continuous force to the rotating drill string in a specific direction through a specific downhole steering tool in the vicinity of the drill bit while rotating the well, with the cooperation of the drilling speed and the pump volume. The variable lateral force artificially changes the direction of the drill bit, and then achieves the purpose of geometric steering or geosteering during rotation.

Compared with traditional drilling technology, rotary steerable drilling technology can keep the drill bit in a state of continuous rotation, so the wellbore cleaning effect is better, the well trajectory control accuracy is higher, the drilling speed is faster, and the probability of accidents such as pipe sticking is smaller , the displacement extension ability is stronger. If it is equipped with a geosteering nipple, the drill bit can automatically search for oil layers at the bottom of the well and drill, so it is of great significance to the exploration and development of oil and gas resources and to improve the oil and gas recovery of oil fields.

At present, rotary steerable drilling technology is mainly in the hands of a few foreign oil technology service companies. Based on their own interests, their steering control technology and steering tools and instruments are strictly kept secret, and they monopolize prices, restrict technology, Restrictions in international bidding and delays in service have seriously affected the progress of drilling technology in my country's petroleum industry, restricted the competitiveness of domestic drilling teams in exploring overseas drilling markets, and become a bottleneck in the technological development and progress of my country's petroleum drilling industry.

In the prior art, the patent with the notification number CN102022082B discloses a method and device for transmitting ground commands for controlling a rotary steerable drilling tool. However, when this technical solution is used for drilling, because the drilling trajectory of the drill bit will deviate from the designed wellbore trajectory, it is necessary to repeatedly transmit control commands to the rotary steerable drilling tool through its ground control system. Adjusting the drilling trajectory leads to the extension of the drilling cycle and limits the improvement of drilling efficiency.

It is based on the above background that the applicant launched a research project on rotary steerable drilling technology.

Rotary steerable drilling technology can be divided into static type and dynamic type from the movement mode of the steering mechanism, and can be divided into push type and pointing type from the way of guiding force generation, and currently domestic users generally use static bias push type Rotary Steerable Drilling Tools. After years of research and development, the applicant has completed the overall structural design of the static offset push-on rotary steerable drilling tool, and successively proposed a series of technical solutions with the theme of "Static offset push-on rotary steerable drilling tool" (announcement numbers are respectively CN103939017A, CN203783462U, CN203783488U and CN203783461U), and the above-mentioned "static offset push-to-type rotary steering drilling tool" has been able to replace similar foreign products for use by virtue of its advantages such as reasonable structure and high reliability.

However, the applicant found in practice that it is difficult to realize the automation, intelligence and high-efficiency drilling required by the modern oil exploration industry only by proposing the technical solution of "static offset push-to-type rotary steerable drilling tool (notification number: CN103939017A)". drilling.

Therefore, the applicant considers combining the structure of the "static offset push-to-rotary steering drilling tool" to design a corresponding rotary steering drilling control system structure, so as to obtain the hardware part of the drilling control system with the characteristics of automation, intelligence and high efficiency. structure.

Utility model content

Aiming at the deficiencies of the above-mentioned prior art, the technical problem to be solved by the utility model is: how to provide a rotary steerable drilling control system in combination with the structure of the "static offset push-to-type rotary steerable drilling tool" (the announcement numbers are respectively CN103939017A) Structure, in order to obtain the hardware structure of the drilling control system with the characteristics of automation, intelligence and high efficiency.

In order to solve the above technical problems, the utility model adopts the following technical solutions:

A control system for rotary steerable drilling, including a ground control system, a ground control box, a bypass valve, an MWD system, a downhole master control board with a decoding unit, and a master control board capable of controlling the movement of the ribs in the steering tool; wherein,

The ground control system includes a host computer;

The ground control system is electrically connected to the ground control box;

The bypass valve is installed on the bypass branch pipe connected with the mud pipeline, and the signal control terminal on the bypass valve is electrically connected with the ground control box; the mud pipeline is used to transport drilling fluid and guide The tool is connected with the mud pump set on the ground;

It also includes a downhole generator, a generator installation section, a coupler, a coupler installation section for installing the coupler, a near-drill bit attitude data acquisition component and a power board;

The downhole generator is fixedly installed inside the generator installation section which is generally cylindrical and has a hollow structure, and the end of the generator installation section is penetrated and fixedly connected to the end of the coupler installation section on the guide tool ;

The downhole master control board is installed on the coupler installation section, the downhole master control board has a receiving end connected to the output end of the downhole generator, and is used to receive the generated electric energy of the downhole motor and pass The decoding unit is used to decode the instructions carried in the mud; the downhole master control board also has a connection end connected to the primary side coil of the coupler and a signal end connected to the MWD system signal;

The secondary coil of the coupler is signal-connected to the main control board;

The attitude data acquisition component near the drill bit and the power board are fixedly installed in the circuit compartment on the guide tool; wherein, the attitude data acquisition component near the drill bit includes a three-axis accelerometer arranged in the Z direction coaxially with the circuit compartment, The three-axis accelerometer is connected to the main control board for signals; the power transmission end of the main control board is connected to the battery in the circuit compartment through the power board; The control signal terminal of the mechanism is connected.

In the structure of the control system of the utility model, the storage battery (high temperature rechargeable battery) is set in the circuit compartment, the main purpose of which is to ensure that the power supply can The main control board is provided with power, so that the main control board can continuously collect static near-drill attitude data in real time, providing a basis for precise control.

During normal drilling work, the voltage output by the downhole generator is rectified and stabilized to supply power to the downhole main control board and main control board, and to charge the battery at the same time.

When the drill pipe is connected to the power outage, the external power supply is switched to the battery, and the main control board collects the three-axis accelerometer, temperature sensor, and pressure sensor (the pressure sensor set in the oil injection pipeline, corresponding to the announcement number CN103939017A, the subject is "static bias Static data such as "pressure sensor 18" in the technical scheme of "push-to-type rotary steerable drilling tool" does not issue commands to the hydraulic mechanism that controls the movement of the wing ribs; at the same time, the collected static data is stored, and when the system is powered on again, it will be stored The static data is uploaded to the MWD system at the first time, and the program in the main control board compares the stored static data with the real-time collected dynamic data, quickly obtains the correct parameters, and guides the next drilling action accordingly.

As an improvement, the attitude data acquisition component near the drill bit further includes a temperature sensor, and the temperature sensor is connected to the main controller for signals.

Because the sensor (this technical solution is a three-axis accelerometer and pressure sensor) usually has a certain temperature coefficient, its output signal will drift with the temperature change, which is called "temperature drift". In order to reduce the temperature drift, some compensation measures are adopted To offset or reduce the temperature drift of its output to a certain extent, this is temperature compensation. Therefore, when the near-bit attitude data acquisition component includes a temperature sensor installed in the circuit compartment, it can detect the ambient temperature near the drill bit in real time, and then perform temperature compensation on the sensor according to the temperature value, thereby ensuring more accurate sensor output The further improvement of the data will help ensure the control accuracy of the control system structure. In addition, the setting of the temperature sensor can also detect and warn the downhole temperature, so that the electronic devices in the steering tool can be in a suitable working temperature range, thereby improving the reliability of the control system structure.

As an improvement, the downhole master control board is connected with the MWD system through an MWD adapter board.

After the above improvements are implemented, because the MWD system is a complete subsystem, the downhole master control board can form an electrical interface on the physical link connected to the MWD system through the MWD adapter board (that is, "QBUS electrical connection") , so that the near-bit attitude data is uploaded through the MWD system. The above-mentioned choice of QBUS electrical connection is because the signal of QBUS is simple (one signal line, one ground line) and the communication distance is long, so it is not easy to be interfered.

Compared with the prior art, adopting the rotary steerable drilling control system structure of the utility model can have the following beneficial technical effects:

1. The control is simpler, more efficient, saving cost and time.

The structure of the control system of the utility model only needs to issue an instruction once, and store the instruction in the main control board. Because the main control board is connected to each sensor used to measure the near-drill attitude data in the circuit compartment, it can obtain the near-drill attitude data in real time, and compare the near-drill attitude data with the data of the above command in real time. The deviation is based on the resultant force decomposition algorithm and the current near-drill attitude data to decompose and issue commands to control the ribs for guidance, thereby eliminating the above deviation. It can be seen that the utility model can realize intelligent closed-loop control in combination with the structure of "static offset push-to-type rotary steerable drilling tool" (the announcement numbers are respectively CN103939017A), automatically and efficiently drill according to the designed trajectory, and make the ground The monitoring of the control system only plays an auxiliary role. In the rotary steerable control system in the prior art, the control of the ground control system plays a leading role. It is necessary to monitor the drilling situation of the drill bit through the ground control system, and it is necessary to issue control commands multiple times through the ground control system to control the drilling of the drill bit. track adjustments.

In addition, because the attitude data acquisition component near the drill bit is fixedly installed in the circuit compartment on the guide tool, and the adjacent drill head is set (the distance between the attitude data acquisition component near the drill bit and the drill bit is about 0.5-1.5 meters), in this way, That is to say, the attitude data obtained by each sensor in the attitude data acquisition component near the drill bit is closer to the attitude data at the position of the drill bit, so that the control speed, accuracy and precision of the control system structure of the present utility model are higher, and more accurate data can be obtained. Ideal control effect.

2. Obtain more accurate and rich data to realize more limited drilling site monitoring.

Adopting the control system structure of the utility model, the data collected and calculated in the main control board and possible alarm information can be uploaded in time by means of the data transmission channel of the MWD system. It can store the command information issued, and store the data collected by each sensor used to measure the attitude data near the drill bit at regular intervals or in real time. This allows for the storage and display of large amounts of rich data in the surface control system structure or in the MWD system located at the surface, which is of great benefit for both field monitoring and post-completion analysis.

Description of drawings

Fig. 1 is a half-sectional view of a static offset push-to-rest rotary steerable drilling tool with publication number CN103939017A.

Fig. 2 is a cross-sectional view of the circuit installation section in the static offset push-to-rest rotary steerable drilling tool of the publication number CN103939017A.

Fig. 3 is a structural block diagram of the structure of the rotary steerable drilling control system of the utility model.

In the figure, 1—non-rotating jacket, 2—tapered roller bearing, 3—O-ring, 4—rib integrated block, 5—rib, 6—plunger, 7—rotating shaft, 8—return spring, 10— Oil circuit manifold, 12—motor seat, 14—servo motor, 15—coupling, 16—piston pump, 19—pump mounting seat, 21—joint, 22—circuit compartment, 23—pressure cylinder, 24—seal Circle, 25—control circuit board (that is, the "main control board" in the structure of this control system), 26—battery, 27—external pressure sensor filter, 28—external pressure sensor, 29—test cover, 30—coupling Housing, 31—coupler (that is, the “coupler” in this control system structure), 32—outlet cover plate, 33—upper bearing seat, 34—rotating mandrel, 35—lower joint (for connecting drill bit) .

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail. Wherein, the descriptive terms such as up, down, left, right, etc. are used for the description, with the purpose of helping readers to understand, but not intended to limit.

As shown in Figures 1 to 3, a structure of a rotary steerable drilling control system includes a ground control system (not shown in the figure), a ground control box (not shown in the figure), and a bypass valve (not shown in the figure) , MWD system (not shown in the figure), downhole master control panel (not shown in the figure) with a decoding unit and capable of controlling the steering tool (the "guiding tool" here is the static bias pusher of the publication number CN103939017A type rotary steerable drilling tool) in the main control board 25 of the rib 5 action; wherein,

The ground control system includes a host computer;

The ground control system is electrically connected to the ground control box;

The bypass valve is installed on the bypass branch pipe connected with the mud pipeline, and the signal control terminal on the bypass valve is electrically connected with the ground control box; the mud pipeline is used to transport drilling fluid and guide The tool is connected with the mud pump set on the ground;

It also includes a downhole generator (not shown in the figure), a generator installation section (not shown in the figure), a coupler 31, a near-bit attitude data acquisition component (not shown in the figure) and a power board (not shown in the figure) out);

The downhole generator is fixedly installed inside the generator installation section which is generally cylindrical and has a hollow structure, and the end of the generator installation section is connected and fixed to the end of the coupler 31 installation section on the guide tool connect;

The downhole master control board is installed on the coupler installation section, the downhole master control board has a receiving end connected to the output end of the downhole generator, and is used to receive the generated electric energy of the downhole motor and pass The decoding unit is used to decode the instructions carried in the mud; the downhole master control board also has a connection end connected to the primary coil of the coupler 31 and a signal end connected to the MWD system signal;

The secondary coil of the coupler 31 is signal-connected to the main control board 25;

The attitude data acquisition component near the drill bit and the power board are fixedly installed in the circuit compartment 22 on the guide tool; wherein, the attitude data acquisition component near the drill bit includes a three-axis acceleration coaxially arranged with the circuit compartment 22 in the Z direction The triaxial accelerometer is connected to the main control board 25 for signal; the power transmission end of the main control board 25 is connected to the storage battery 26 in the circuit compartment 22 through the power board; the main control board 25 is connected to the user It is connected with the control signal end of the hydraulic mechanism controlling the action of the wing rib 5 .

During specific implementation, the main control board includes a processing module, and a storage module, a power module, and an interface module respectively connected to the processing module; the main control board is connected to the power supply board through a power supply module; the main control board The interface module is connected with the near-bit attitude data acquisition component for signal connection.

During specific implementation, the downhole generator can adopt the notification number CN201078306Y in the prior art, named "downhole mud turbine generator".

The coupler 31 can adopt the application number 201510371056.2 proposed by the applicant, named "A Transmitter for Downhole Wireless Bidirectional Signal and Electric Energy", or adopt the announcement number CN103180539B in the prior art, named "Downhole Inductor Coupler 31 components", all of which can simultaneously transmit power and signals.

Wherein, the attitude data acquisition component near the drill bit further includes a temperature sensor, and the temperature sensor is connected to the main controller for signals (not shown in the figure).

In the ground monitoring of the control system structure, in addition to the data measured by the own sensor uploaded by the MWD system, the near-drill attitude data and alarm parameter information collected by the near-drill attitude data acquisition component are uploaded to the ground through the MWD channel, thereby It is convenient to monitor the drilling process more accurately, and can customize and upload data according to the different needs of actual engineering drilling, and make full use of the upload efficiency of the MWD system.

The control system structure can upload the types of attitude data near the drill bit as follows:

Well inclination angle, gravity tool face angle, vibration value, battery power, pressure value of each rib 5, temperature value of each rib 5, bus voltage, ambient pressure, motor speed, motor current, FLASH capacity, time information (year, Month, day, hour, minute, second, week), fault alarm information (servo motor fault, positioning assembly fault, various communication faults, various sensor faults, etc.).

Wherein, the downhole master control board is connected with the MWD system through the MWD adapter board.

During specific implementation, the MWD system includes ground equipment and downhole measuring instruments, wherein the downhole measuring instruments are installed in the installation nipple fixedly connected with the static bias push-to-type rotary steerable drilling tool; the MWD adapter plate and the downhole master control board are fixedly installed in the coupler installation section;

The downhole master control board includes a first processor, and a storage module, a first communication module, a power module and an interface module respectively connected to the first processor; the interface module is also connected to the original coupler side coil signal connection;

The MWD adapter board includes a second processor, and a second communication module and a level converter respectively connected to the second processor; the level converter is also connected to the downhole measuring instrument signal; the A communication connection between the first communication module and the second communication module. The level shifter can use a 74xHCT series chip. During specific implementation, both the first communication module and the second communication module can use a wireless communication module (such as Bluetooth or infrared) or a wired communication module (CAN communication module).

The above are only the preferred embodiments of the present utility model. It should be pointed out that those skilled in the art can also make some deformations and improvements without departing from the technical solution. The above-mentioned deformations and improved technical solutions should be regarded as falling Into the scope of protection claimed by this application.

Claims (3)

1. A rotary steering drilling control system structure comprises a ground control system, a ground control box, a bypass valve, an MWD system, an underground master control board with a decoding unit and a master control board capable of controlling the action of a wing rib in a steering tool; wherein,

the ground control system comprises an upper computer;

the ground control system is electrically connected with the ground control box;

the bypass valve is arranged on a bypass branch pipe connected with the slurry pipeline, and a signal control end on the bypass valve is electrically connected with the ground control box; the mud pipeline is used for conveying drilling fluid and connecting the guiding tool with a mud pump arranged on the ground;

the device is characterized by further comprising an underground generator, a generator mounting section, a coupler mounting section for mounting the coupler, a near-bit attitude data acquisition assembly and a power panel;

the underground generator is fixedly arranged in a generator mounting section which is cylindrical as a whole and has a hollow structure, and the end part of the generator mounting section is communicated and fixedly connected with the end part of a coupler mounting section on the guiding tool;

the underground master control board is arranged at the coupler mounting section, is provided with a receiving end connected with the output end of the underground generator and is used for receiving the electric energy generated by the underground generator and decoding the instruction carried in the mud through a decoding unit; the underground master control board is also provided with a connecting end connected with a primary coil of the coupler and a signal end connected with the MWD system signal;

the secondary coil of the coupler is in signal connection with the main control board;

the near-bit attitude data acquisition assembly and the power panel are fixedly arranged in a circuit bin on the guiding tool; the near-bit attitude data acquisition assembly comprises a triaxial accelerometer which is coaxially arranged with the circuit cabin in the Z direction, and the triaxial accelerometer is in signal connection with the main control board; the power supply conveying end of the main control board is connected with a storage battery in the circuit bin through a power supply board; the main control board is connected with a control signal end of a hydraulic mechanism for controlling the movement of the wing ribs.

2. The rotary steerable drilling control system architecture of claim 1, wherein the near bit attitude data acquisition component further comprises a temperature sensor in signal connection with the master controller.

3. The rotary steerable drilling control system architecture of claim 1, wherein the downhole master control board is connected to the MWD system via an MWD adapter board.