A ground excitation type magnetic ranging-while-drilling device

Abstract

This utility model relates to the field of oil and gas field development technology and discloses a ground-excited magnetic ranging device for drilling, including a ground excitation system, a measurement-while-drilling module, a data transmission system, and a ground ranging software system. The measurement-while-drilling module includes a turbine generator pulser, a rectifier-encoded drive sub, and a high-precision magnetic measurement sub, which are connected sequentially. The ground excitation system includes a high-power power supply and a ground host. This utility model integrates the measurement-while-drilling module into the drill string assembly, and the data is transmitted to the ground in real time via mud pulses. Engineers can see the relative position of the drill bit and each adjacent well on the screen in real time while drilling, thereby achieving active navigation and collision avoidance. This avoids the drawbacks of traditional cable-based active measurement, which requires tripping and stopping drilling operations, greatly improving drilling efficiency and saving expensive drilling rig operation time.

Description

Technical Field

[0001] This utility model belongs to the field of oil and gas field development technology, specifically, it relates to a ground-excited magnetic ranging device for drilling. Background Technology

[0002] In oil and gas field development, with the widespread application of technologies such as directional drilling, cluster wells, SAGD (steam-assisted gravity drainage) dual horizontal wells and rescue wells, it is crucial to accurately determine the relative positional relationship between the well being drilled and adjacent existing wells (especially those with casing). Achieving adjacent well positioning can effectively avoid drilling collision risks, ensure accurate wellbore trajectory guidance, and ensure precise connectivity during rescue well operations.

[0003] Magnetic ranging technology can directly determine relative position by measuring magnetic signals, and has become the mainstream direction of anti-collision technology. Traditional active magnetic ranging technology actively strengthens the magnetic field signal of the target casing by injecting excitation current into the formation, which effectively solves the problems of weak signal and detection distance. However, existing active technologies mostly adopt cable-based operations, such as using a logging truck to lower the transmitting electrode and probe, which requires interrupting the drilling process and cannot achieve real-time measurement while drilling. The operation cost is high and the efficiency is low. Therefore, we propose a ground-excited magnetic ranging device for drilling. Utility Model Content

[0004] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:

[0005] A ground-excited magnetic ranging device for drilling includes a ground excitation system, a drilling measurement module, a data transmission system, and a ground ranging software system. The drilling measurement module includes a turbine generator pulse generator, a rectifier-encoded drive section, and a high-precision magnetic measurement section, which are connected sequentially. The ground excitation system includes a high-power power supply and a ground host. The data transmission system uses mud pulse transmission. The ground ranging software system includes a data receiving module, an inversion calculation module, and a graphical user interface.

[0006] In a preferred embodiment of this utility model, the measurement while drilling module is encapsulated inside a non-magnetic drill collar.

[0007] In a preferred embodiment of this utility model, the measurement while drilling module is used to acquire downhole magnetic field and gravity field data in real time.

[0008] In a preferred embodiment of this utility model, the high-power power supply can output a zero-crossing square wave excitation signal with a frequency of 0.3-30Hz, a current of 0-20A, and a voltage of 0-1000V.

[0009] In a preferred embodiment of this utility model, the ground ranging software system is used to display the wellbore trajectory, relative distance, and azimuth in real time.

[0010] In a preferred embodiment of this utility model, the data transmission system is used to realize real-time data communication from downhole to the surface.

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] This invention integrates a measurement-while-drilling (MWD) module into the drill string assembly. Data is transmitted to the surface in real time via mud pulses. Engineers can see the relative position of the drill bit to each adjacent well on a screen while drilling, thereby achieving active navigation and collision avoidance. This avoids the drawbacks of traditional cable-based active measurement, which requires tripping and stopping the drill string, greatly improving drilling efficiency and saving expensive drilling rig operation time.

[0013] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0014] In the attached diagram:

[0015] Figure 1 This is a schematic diagram of the structure of the measurement while drilling module of this utility model;

[0016] Figure 2 This is a diagram of the passive magnetic ranging and guidance detection scheme for this utility model.

[0017] In the diagram: 1. Turbine generator pulse; 2. Rectifier encoder drive sub; 3. High-precision magnetic measurement sub. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model.

[0019] like Figures 1 to 2 As shown, this utility model provides a technical solution: a ground-excited magnetic ranging device for drilling, comprising a ground excitation system, a drilling measurement module, a data transmission system, and a ground ranging software system. The drilling measurement module includes a turbine generator pulse 1, a rectifier-encoder drive section 2, and a high-precision magnetic measurement section 3, which are connected in sequence. The ground excitation system includes a high-power power supply and a ground host. The data transmission system uses mud pulse transmission. The ground ranging software system includes a data receiving module, an inversion calculation module, and a graphical user interface.

[0020] Furthermore, the measurement-while-drilling module is encapsulated within a non-magnetic drill collar.

[0021] Furthermore, the measurement-while-drilling module is used to acquire downhole magnetic and gravity field data in real time.

[0022] Furthermore, the high-power power supply can output a zero-crossing square wave excitation signal with a frequency of 0.3-30Hz, a current of 0-20A, and a voltage of 0-1000V.

[0023] Furthermore, the ground ranging software system is used to display the wellbore trajectory, relative distance, and azimuth in real time.

[0024] Furthermore, the data transmission system is used to enable real-time data communication from downhole to the surface.

[0025] The implementation principle of a ground-excited magnetic ranging device for drilling is as follows: the ground excitation system generates a customized excitation signal, which is introduced into the formation through the wellhead injection device of the rescue well; the measurement while drilling module collects the target well casing response magnetic field and wellbore trajectory data in real time; the data transmission system transmits the data to the ground in real time through the mud pulses emitted by the turbine generator pulser; the ground ranging software system performs data inversion and visualization, and outputs relative distance and azimuth information.

Claims

1. A ground-excited magnetic ranging device for drilling, comprising a ground excitation system, a drilling measurement module, a data transmission system, and a ground ranging software system, characterized in that, The measurement while drilling module includes a turbine generator pulse (1), a rectifier-encoded drive section (2), and a high-precision magnetic measurement section (3), which are connected in sequence. The ground excitation system includes a high-power power supply and a ground host. The data transmission system uses mud pulse transmission. The ground ranging software system includes a data receiving module, an inversion calculation module, and a graphical user interface.

2. The ground-excited magnetic ranging-while-drilling device according to claim 1, characterized in that The measurement while drilling module is encapsulated inside a non-magnetic drill collar.

3. The ground-excited magnetic ranging-while-drilling device of claim 1, wherein, The measurement while drilling module is used to acquire downhole magnetic field and gravity field data in real time.

4. The ground-excited magnetic ranging device for drilling as described in claim 1, characterized in that, The high-power power supply can output a zero-crossing square wave excitation signal with a frequency of 0.3-30Hz, a current of 0-20A, and a voltage of 0-1000V.

5. The ground-excited magnetic ranging-while-drilling device of claim 1, wherein, The ground ranging software system is used to display the wellbore trajectory, relative distance, and orientation in real time.

6. The ground-excited magnetic ranging-while-drilling device of claim 1, wherein, The data transmission system is used to achieve real-time data communication from downhole to the surface.

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