A near-drill bit logging system and method based on coupling communication
A near-bit and bit technology, applied in the field of oil and gas field exploration and development, can solve problems such as the inability to effectively guarantee the stability and life of data transmission, the winding and wear of transmission lines, and achieve the effect of improving accuracy and real-time measurement and transmission
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no. 1 example
[0042] This embodiment specifically describes a near-drill logging system based on coupling communication. figure 1 A schematic diagram of the frame of the near-bit logging system is shown.
[0043] like figure 1 As shown, the near-bit logging system based on coupling communication includes: a pulser 101 , a motor 102 , a wireless short-pass drill pipe 103 , a wireless through-wall coupler 104 , a near-bit sensor 105 and a drill bit 106 . in,
[0044] The drill bit 106 is used for drilling wells.
[0045] The motor 102 is used to provide rotational power for the drill bit.
[0046] The near-drill sensor 105 is used to measure geological signals during drilling, and the near-drill sensor 105 is close to the drill bit 106 to improve logging reliability.
[0047] The wireless through-wall coupler 104 is connected with the near-drill sensor 105, and is used for transmitting the geological signal measured by the near-drill sensor 105 from the interior of the conventional drill ...
no. 2 example
[0053] This embodiment further elaborates the near-drill bit logging system based on coupling communication. figure 2 It is a schematic structural diagram of the near-drill bit logging system based on coupling communication in this embodiment. like figure 2 As shown, the near-drill bit logging system of this embodiment includes:
[0054] Conventional drill pipe 201, pulser 202, motor 203, wireless short-pass drill pipe 204, wireless through-wall coupler 205, near-bit logging sensor 206, and drill bit 207.
[0055] image 3 It is the front view of the schematic structural diagram of the wireless through-wall coupler 205 in this embodiment; Figure 4 It is a schematic top view of the structure of the wireless through-wall coupler of this embodiment. like image 3 and Figure 4 As shown, there is a transmitting antenna 304 on the rotating drill rod 302 inside the drill rod, the transmitting antenna 304 is located on the surface of the rotating body, and is composed of 4 o...
no. 3 example
[0095] This embodiment provides a near-drill bit logging method based on coupling communication. The method comprises the steps of:
[0096] In step S11, the motor provides rotational power for the drill bit to drive the drill bit to perform drilling operations.
[0097] Step S12 , the near-drill-bit sensor located at the back of the drill bit measures geological signals during drilling, and transmits the geological signals to the wireless through-wall coupler connected with the sensor.
[0098] In step S13, the wireless through-wall coupler transmits geological signals from the inside of the drill pipe to the outside of the drill pipe.
[0099] Preferably, the inside of the drill pipe is a rotating structure, and the outside of the drill pipe is a casing. The specific process may be to transmit the measured geological signal from the rotating structure inside the drill pipe to the casing outside the drill pipe.
[0100] Step S14, the wireless short transmission drill pipe r...
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